Entries |
Document | Title | Date |
20080196418 | Method and Control for Preventing Flooded Starts in a Heat Pump - A heat pump is provided with an improvement while switching from heating/cooling mode to a defrost mode. Prior to initiation of a defrost mode, an electronic expansion device is moved to an open position such that refrigerant can migrate between the indoor-outdoor heat exchangers. When the operation of the defrost cycle is initiated, there is a lower likelihood and severity of flooded starts, as the refrigerant, under existing pressure differential at system shutdown, will move to the heat exchanger that will be downstream of the compressor in the defrost mode. Thus, no flooded start will occur on the subsequent compressor start-up. After completion of the defrost cycle, the electronic expansion device is again opened prior to return to operation in the conventional heating/cooling mode. In case subsequent starts are in an identical mode of operation, the electronic expansion valve is kept closed during shutdown to minimize cyclic performance losses. | 08-21-2008 |
20080196419 | BUILD-UP MONITORING SYSTEM FOR REFRIGERATED ENCLOSURES - A build-up monitoring system in combination with a refrigerated enclosure comprises a refrigerated enclosure having a drain, a drain basin and a refrigeration unit adapted to maintain refrigerating conditions in the refrigerated enclosure. A build-up detector is positioned with respect to the refrigerated enclosure so as to monitor a level of build-up in the drain/drain basin. A condition analyzer receives detection data from the build-up detector, the condition analyzer identifying from the detection data a build-up in the drain/drain basin requiring an intervention. An interface indicates the requirement for the intervention. A method is provided to identify a build-up requiring an intervention in a drain/drain basin of a refrigerated enclosure. | 08-21-2008 |
20080202131 | System and Method for Controlling Defrost Cycles of a Refrigeration Device - Methods, systems and computer readable code for controlling a defrost cycle of a refrigeration device are disclosed. According to some embodiments, a defrost command is issued to a defrost heater at a time determined at least in part by a total wasted energy parameter of the compressor for at least one time interval. In some embodiments, time interval includes a plurality of runtimes, and the total wasted energy parameter of a runtime is measured relative to a chosen reference runtime such as a minimum energy runtime after a defrost or an early runtime after a defrost. Optionally, a sequence of wasted energy parameters of the compressor for a sequence of time intervals is analyzed, and then a correction is performed on at least one wasted energy parameter. | 08-28-2008 |
20080209923 | SYSTEM AND METHOD FOR VEHICLE DEFOGGING CONDITION CALCULATION AND CONTROL - A method and apparatus for controlling a vehicle HVAC system to automatically defog a windshield glass and to prevent fogging or condensation of the windshield glass. The ambient air temperature and vehicle speed are measured and used to determine a windshield glass temperature. The in-cabin air temperature and relative humidity are measured and used to determine a dewpoint. An dewpoint margin is calculated to compensate for sensor accuracy and fog predictability. A fog margin, which is based upon calculated windshield glass temperature and dewpoint, is calculated and used, in conjunction with the dewpoint margin, to control the HVAC system to anticipate potential fogging conditions and to scale the intensity of the HVAC system response based upon the severity of fogging conditions. | 09-04-2008 |
20080223049 | Adaptive defrost control for frozen product dispensers - An adaptive defrost control for a frozen product machine implements an algorithm that utilizes various operating parameters of the machine to adaptively adjust the time interval between successive defrost cycles in a manner such that defrost cycles occur only on an as-needed basis. The adaptive defrost control minimizes the time during which the machine is in a defrost cycle, thereby maximizing the uptime of the machine during which frozen can be prepared. | 09-18-2008 |
20080245081 | Refrigerator and method to control the same - A refrigerator and a method to control the same are provided. The refrigerator includes a body having a supercooling compartment, a cooling unit to provide cool air to the supercooling compartment, an electromagnetic radiation sensor to detect electromagnetic radiation emitted when a food placed in the supercooling compartment begins to freeze, an energy supply to apply energy to the food placed in the supercooling compartment to prevent freezing of the food, and a controller to receive a detection signal from the electromagnetic radiation and then to activate the energy supply. Electromagnetic radiation emitted from each beverage in a supercooled state when the beverage begins to freeze is detected and energy is applied to the beverage according to the detection. | 10-09-2008 |
20090090114 | Refrigeration control device to reduce power consumption of a refrigeration appliance - A refrigeration control device to reduce power consumption of a refrigeration appliance has an ambient temperature/humidity sensor and a main controller. The ambient temperature/humidity sensor is mounted outside the refrigeration appliance. The main controller is mounted in the refrigeration appliance, is electronically connected to the ambient temperature/humidity sensor and at least one defogging heater in the refrigeration appliance and stores a dew point formula, a defogging database and a defogging control process. The defogging database is a table of multiple standard dew point values and multiple defogging duration values. The defogging control process calculates a dew point from the dew point formula, enters the table with the closest standard dew point value and extracts the corresponding defogging duration value from the table in the defogging database and activates the defogging heater for a number of times equal to the extracted defogging duration value. | 04-09-2009 |
20090113902 | CONTROL METHOD FOR A REFRIGERATOR - A refrigerator control method is provided that may efficiently perform a defrosting operation. The method includes performing a normal operation of a refrigerating storage room and a normal operation of a freezing storage room selectively or simultaneously, setting a variable defrosting period, which is varied according to set parameters including the relative humidity of external air, and performing a defrosting operation based on the set defrosting period. | 05-07-2009 |
20090193820 | REFRIGERATION MACHINE AND OPERATING METHOD FOR IT - A refrigeration machine for a domestic refrigerator includes a compressor, a condenser and an evaporator, which are connected to form a refrigerant circuit, wherein a stop valve is arranged in a refrigerant path from the condenser to the evaporator. | 08-06-2009 |
20090241561 | Refrigerator and defrost control method thereof - Disclosed herein are a refrigerator and a defrost control method thereof that are capable of sensing an amount of frost formed on an evaporator based on a change amount of absolute humidity in the refrigerator to control a defrost operation. A defrost control method of a refrigerator including a storage chamber and an evaporator to cool the storage chamber, includes sensing absolute humidity in the storage chamber, determining an estimated amount of frost formed on the evaporator using time segments in which the absolute humidity in the storage chamber decreases, and controlling a defrost operation based on the estimated amount of frost. According to the present embodiments, it is possible to perform the defrost operation at the point of time for optimum defrost, thereby maximizing energy efficiency and cooling efficiency. | 10-01-2009 |
20090272133 | Method and Device for Deicing and Cleaning of Fans - The invention pertains to a method and apparatus for removing ice layers and/or snow layers and/or dirt layers from the rotor blades of axial fans in cooling installations for refrigerating and/or freezing products. At least one cleaning substance jet is directed toward the rotor blades of an axial fan within certain time intervals in such a way that ice layers and/or snow layers and/or dirt layers are at least separated from the surfaces of the rotor blades and transported away, wherein the rotor blades rotate with nominal speed while cleaning jets act upon their surfaces. | 11-05-2009 |
20090293512 | RADIATOR FAN CONTROL FOR HEAT PUMP HVAC - The invention relates to a radiator fan control for heat pump HVAC which can selectively reverse fan direction based on ambient temperature and reduce ice buildup on a liquid-gas converter. In one embodiment, the invention is an automobile with a liquid-gas converter located within an engine bay, a radiator located adjacent the liquid-gas converter, a first fan located adjacent the radiator, a fuel cell and motor with the inverter located adjacent the first fan, the fuel cell supplying electricity to the motor with the inverter to drive the vehicle. The invention can also include a temperature sensor located on an exterior surface the automobile to sense an ambient temperature, a heater core connected to the liquid-gas converter and located between the engine bay and the passenger area, and a control unit connected to the first fan, the temperature sensor, and the heater core. | 12-03-2009 |
20100005816 | Intelligent Defrosting Control Method for an Air Conditioner - An intelligent defrosting control for an air conditioner is disclosed, which comprises the following steps: setting a standard air pressure value; placing a high-pressure sensor on the exhaust pipe of the compressor of the air conditioner to measure the air pressure; When the air pressure measured by the high-pressure sensor is lower than the standard air pressure value, said air conditioner begins to come into the defrosting mode; otherwise, said air conditioner working in previous mode. | 01-14-2010 |
20100107661 | METHOD FOR OPERATING TRANSPORT REFRIGERATION UNIT WITH REMOTE EVAPORATOR - A transport refrigeration unit for cooling the interior of a cargo box having multiple cargo compartments includes a refrigerant compressor, a main evaporator associated with a first compartment of the trailer and a remote evaporator associated with a second compartment of the cargo box. During loading of product into at least one compartment, a controller determines the degree of superheat (CSS) in the refrigerant, compares the degree of suction superheat (CSS) to a lower limit for the degree of superheat (LSS), and continues operation of the refrigerant unit in a refrigeration mode if the degree of suction superheat (CSS) is greater than the lower limit for the degree of superheat (LSS); or terminates operation of the refrigerant unit in the refrigeration mode if the degree of suction superheat (CSS) is not greater than the lower limit for the degree of superheat (LSS) and initiates a defrost of at least one of the evaporators. | 05-06-2010 |
20100126191 | Cooling system and method of controlling the same - An oscillatory wave generating unit and an oscillatory wave sensing unit are installed at both ends of a refrigerant pipe of an evaporator of the cooling system, an amount of frost formed on the refrigerant pipe is determined by comparing a wave form of an oscillatory wave generated from one end of the refrigerant through the oscillatory wave generating unit and a wave form of the oscillatory wave sensed by the other one end of the refrigerant through the oscillatory wave sensing unit, and whether or not a defrosting operation is performed is determined by a result of the determination. The cooling system increases the accuracy in sensing the amount of the frost formed on the evaporator of a refrigerator, a Kimchi refrigerator, or an air conditioner, and respectively starts and ends the defrosting operation at proper points of time, thus enhancing a heat-exchanging performance and increasing energy efficiency. | 05-27-2010 |
20100154443 | CONTROL METHOD OF REFRIGERATOR - The present invention provides a method of controlling a refrigerator, including a main body having a plurality of storage chambers; a plurality of evaporators installed to independently cool the plurality of storage chambers, respectively; and a refrigerant control valve for controlling refrigerant introduced into the plurality of evaporators, the method includes a refrigerant control valve opening step of opening the refrigerant control valve so that the refrigerant can be introduced into at least one of the plurality of evaporators; an evaporator defrost step of, when an opening integration time of the refrigerant control valve is higher than a defrost setting time of the evaporator, at which the refrigerant is introduced by the refrigerant control valve, operating the refrigerator in a defrost mode of the evaporator in which the refrigerant is introduced; and an evaporator defrost end step of, when temperatures sensed by defrost sensors of the evaporators that are being defrosted are higher than return setting temperatures after the evaporator defrost step begins, ending the defrost mode of the refrigerator. Accordingly, the present invention is advantageous in that it can defrost each evaporator efficiently at an exact point of time at which defrosting is required. | 06-24-2010 |
20100175393 | Biomaterial Freezing - The biocontainer of the present invention provides a low cost, simple solution of many of the problems encountered during shipping, freezing and thawing of biopharmaceutical materials. The present invention enables a user to monitor the temperature profile of each biopharmaceutical container during the cryogenic process, so as to ensure the integrity of materials within each biocontainer by using a pre-installed and pre-sterilized temperature sensor. In some embodiments, the sensor assembly includes a wireless transmitter and is capable of transmitting information regarding the measured reading. In other embodiments, the sensor assembly includes a processing unit, which determines whether the temperature profile is acceptable. In a further embodiment, an indicator is included, such that the processing unit may indicate whether the biopharmaceutical material has been properly frozen. In other embodiments, the sensor assembly also includes a storage element, which is capable of storing various parameters during the freezing process. | 07-15-2010 |
20100192599 | AIR CONDITIONER AND METHOD FOR CONTROLLING THE SAME - An air conditioner is provided. The air conditioner includes a heat exchanger which exchanges heat with air by passing a coolant therethrough; an anti-freeze apparatus which prevents the freeze of water on the surface of the heat exchanger by supplying energy to the heat exchanger; and a control unit which controls the anti-freeze apparatus according to operating conditions of the air conditioner. Therefore, the air conditioner can effectively prevent the freeze of water, if any, on the surface of the heat exchanger. | 08-05-2010 |
20100205983 | AUTOMATIC DEFROST EVAPORATOR SYSTEMS - A method of defrosting a eutectic plate of a refrigeration system involves activating a defrost system when a power source is connected to the refrigeration system. The defrost system is operated for all or a portion of a defrost cycle and is then deactivated. The initiation of a subsequent defrost cycle is prevented until the power source has been disconnected from the refrigeration system for at least a selected amount of time. A defrost system may include a controller programmed to carry out the method and automatically initiate a series of defrost cycles. | 08-19-2010 |
20100251735 | REFRIGERATOR, AND METHOD FOR CONTROLLING OPERATION OF THE SAME - The present invention discloses a refrigerator which can individually cool a freezing chamber and a refrigerating chamber by dividing a heat exchange region of an evaporator into a freezing chamber side region and a refrigerating chamber side region, forming individual circulation passages for supplying cool air from each region to the freezing chamber and the refrigerating chamber, and forming a freezing chamber fan and a refrigerating chamber fan on each circulation passage, and method for controlling operation of the same which can efficiently perform a cooling operation and reduce power consumption by effectively controlling the operations of each component. | 10-07-2010 |
20100269519 | Retrofittable air conditioner to refrigeration conversion unit - A conversion unit for an air conditioning system to cause it to act like the cooling unit of a refrigeration system comprises a frost detector, an A/C temperature control defeating mechanism and a control unit which operate together to force the range of operation of the air conditioning unit into the range of operation of a refrigeration unit. The conversion unit is particularly useful for providing low cost cooling systems for farmers in third world countries for keeping their produce fresh and safe, not to mention its use by all farmers around the world and by florists or others in need or desire of an economical refrigeration alternative. The present invention is also usable to provide inexpensive cooling to RV's and to refrigerated vehicles. | 10-28-2010 |
20100275620 | APPARATUS AND METHOD FOR PROVIDING CONDENSATION- AND FROST-FREE SURFACES ON CRYOGENIC COMPONENTS - Apparatus that prevents the buildup of frost or ice on plumbing in a cryogenic delivery system ( | 11-04-2010 |
20100293972 | Sensor assembly for detecting ice crystal formation on heat exchange surface and ice-making machine incorporating the same - A sensor assembly for detecting ice crystal formation on a heat exchange surface in an ice-making machine comprises at least one microphone monitoring the sound made by a rotating blade assembly within the ice-making machine during ice slurry formation. A filter filters the output of the microphone to remove background noise. A comparator receives the output of the filter and compares the filtered microphone output with a threshold to determine if the filtered microphone output signifies ice crystal formation on the heat exchange surface. The operation of the ice-making machine can then be adjusted in a manner to allow the formed ice crystals to be removed from the heat exchange surface. | 11-25-2010 |
20110079027 | REMOVAL OF AN ACCUMULATED FROZEN SUBSTANCE FROM A COOLING UNIT - An embodiment of a probe includes a sensor and a support. The sensor is operable to provide an indication of a thickness of a frozen substance that has accumulated between the sensor and a cooling fin of a cooling unit, and the support is operable to hold the sensor spaced apart from the cooling fin. For example, a defrost controller may use an embodiment of such a probe to monitor an amount of frost build up on the fin or fins of a cooling unit (e.g., a refrigeration or freezer unit) so that the controller may initiate a defrost cycle only when warranted. Such a probe may be more reliable than other defrost-detection techniques, and such a defrost controller may increase the cooling and energy efficiencies of a cooling unit as compared to a cooling unit having a conventional defrost controller. | 04-07-2011 |
20110088415 | ADAPTIVE DEFROST CONTROLLER FOR A REFRIGERATION DEVICE - A system and method for controlling automatic defrost of a refrigerator device are provided. The system adaptively moves the defrost cycle to low usage times based on an evaluation of compressor usage in a daily cycle. | 04-21-2011 |
20110088416 | Vacuum And Freeze-Up HVAC Sensor - An apparatus for monitoring an HVAC system. The apparatus comprises a freeze-up sensor, a vacuum sensor, and a thermostat. The freeze-up sensor communicates a signal to indicate that ice is developing in the HVAC system and the vacuum sensor communicates a signal to indicate that a vacuum pressure exists in the HVAC system. When a signal is detected, the apparatus deactivates the HVAC system to prevent damage. The thermostat comprises a touch-screen display with a continuous set-point. | 04-21-2011 |
20110094245 | DEFROSTING SYSTEM AND METHOD OF REFRIGERATION - Disclosed is a defrosting system and a defrosting method of a refrigerator, the system including an evaporator configured to reduce an ambient temperature by heat exchange through movement of refrigerant, a frost monitoring camera by photographing a state of frost adhered to the evaporator, a controller configured to grasp changes of an image captured by the frost monitoring camera to determine a defrosting start time, and a heat-generating unit configured to emit heat in response to a signal applied from the controller to remove the frost, whereby an unnecessary operation of a heat-generating unit is prevented by appropriately coping with an environment that flexibly changes according to an inner situation of a refrigerator and by accurately determining, by the controller, a start time and a completion time of defrosting operation for removing frost adhered to the refrigerator. | 04-28-2011 |
20110126560 | Surged Vapor Compression Heat Transfer Systems with Reduced Defrost Requirements - Surged vapor compression heat transfer systems, devices, and methods are disclosed having refrigerant phase separators that generate at least one surge of vapor phase refrigerant into the inlet of an evaporator after the initial cool-down of an on cycle of the compressor. This surge of vapor phase refrigerant, having a higher temperature than the liquid phase refrigerant, increases the temperature of the evaporator inlet, thus reducing frost build up in relation to conventional refrigeration systems lacking a surged input of vapor phase refrigerant to the evaporator. | 06-02-2011 |
20110167844 | Defrost Vapor Recondenser - In general terms, this disclosure is directed towards a vapor recovery system. The vapor recovery system comprises material specifically designed to recondense vapor during defrost cycle. This material would be of sufficient thermal mass to remain at a lower temperature during the defrost cycle. The vapor may be condensed directly in the evaporator compartment or indirectly by removing the vapor to a remotely located recondense medium. | 07-14-2011 |
20110203299 | HEAT PUMP SYSTEM AND METHOD OF OPERATING - A heat pump system operable in a cooling mode, a heating mode and a defrost mode includes a refrigerant compressor ( | 08-25-2011 |
20110225992 | AIR CONDITIONER USING PHOTOVOLTAIC ENERGY - An air conditioner using photovoltaic energy is provided. The air conditioner may include a photovoltaic cell for converting photovoltaic energy into Direct Current (DC) power, an indoor unit for exchanging heat, and an outdoor unit for exchanging heat. Photovoltaic power generated by the photovoltaic cell may be supplied to the indoor unit and used as at least one of standby power in a standby mode, consumption power in an automatic photovoltaic mode, or auxiliary power in a cooling mode. | 09-22-2011 |
20110225993 | REFRIGERATOR HAVING A DEFROST HEATER - A refrigeration appliance includes an evaporator and a defrost heater which periodically subjects the evaporator to a defrost process, A temperature sensor is disposed at least in proximity to the evaporator and is adapted for switching off the defrost heater once the temperature sensor detects a predetermined defrost temperature. The temperature sensor provides a predetermined defrost temperature profile having first, second and third time segments. A first defrost temperature during the first time segment changes to a second defrost temperature during the second time segment, and holds the second defrost temperature during the third time segment. | 09-22-2011 |
20110225994 | REFRIGERATOR AND METHOD FOR THE TEMPERATURE CONTROL IN A REFRIGERATOR - A refrigerator, in particular a household refrigerator, includes an utility chamber for cooled goods and a control device, with which a cold air flow can be introduced into the utility chamber when a cooling signal is present. A defrost heating element is rendered operative by the control device to prevent the formation of condensate and/or ice due to the cold air flow fed into the utility chamber. A timing element keeps the heating element out of operation for a predetermined time interval in response to the generation of the cooling signal. | 09-22-2011 |
20110289945 | CONTROL METHOD OF A REFRIGERATOR - An embodiment according to the present invention is to provide a control method of a refrigerator that can operate a compressor before a start of a defrost operation and during a predetermined time to supply a high-temperature hot gas to an evaporator. With the control method of the refrigerator according to the embodiments of the refrigerator, the compressor is driven immediately before the defrost operation and the blower fan cooling the compressor stops, such that the high-temperature hot gas can be supplied to the evaporator, thereby increasing the defrost efficiency. | 12-01-2011 |
20110289946 | RADIATOR FAN CONTROL FOR HEAT PUMP HVAC - The invention relates to a radiator fan control for heat pump HVAC which can selectively reverse fan direction based on ambient temperature and reduce ice buildup on a liquid-gas converter. In one embodiment, the invention is an automobile with a liquid-gas converter located within an engine bay, a radiator located adjacent the liquid-gas converter, a first fan located adjacent the radiator, a fuel cell and motor with the inverter located adjacent the first fan, the fuel cell supplying electricity to the motor with the inverter to drive the vehicle. The invention can also include a temperature sensor located on an exterior surface the automobile to sense an ambient temperature, a heater core connected to the liquid-gas converter and located between the engine bay and the passenger area, and a control unit connected to the first fan, the temperature sensor, and the heater core. | 12-01-2011 |
20110302937 | DEMAND DEFROST FOR HEAT PUMPS - A heat exchanger includes a motor that rotates a motor shaft to rotate a fan. An operating speed of the motor shaft determines an airflow through a heat exchanger coil. The heat exchanger also includes a sensor that detects a parameter of the motor shaft and a control. The parameter detected by the sensor is communicated to the control. The parameter is one of the operating speed of the motor shaft and a motor shaft torque. If the parameter is the operating speed, the control initiates a defrost cycle when the operating speed of the motor shaft is less than or equal to a threshold value. If the parameter is the motor shaft torque, the control initiates the defrost cycle when the torque application to the motor shaft is greater than or equal to a threshold value. | 12-15-2011 |
20120023974 | REFRIGERATOR AND METHOD FOR CONTROLLING THE SAME - The present invention relates to refrigerators, and more particularly, to a refrigerator which can measure an amount of frost on an evaporator in real time and determine a frost removing time; and a method for controlling the same. | 02-02-2012 |
20120042666 | DEMAND RESPONSE MULLION SWEAT PROTECTION - An appliance such as a refrigerator receives a demand response signal indicating a peak demand period and operates the refrigerator in an energy savings mode by disabling an anti-sweat heater. A sensor on an external surface of the refrigerator enables the anti-sweat heater during the peak demand period if moisture is detected by the sensor. A preselected location can be defined where incipient moisture would form such as reducing the amount of insulation in this location. By forming a depression in the location and using an impedance-type sensor, moisture can be easily detected. The sensor signal is sent to the controller which then activates the anti-sweat heater to remove the moisture. | 02-23-2012 |
20120042667 | MICROPROCESSOR CONTROLLED DEFROST TERMINATION - An apparatus and method are disclosed for terminating a refrigeration unit's defrost function. The refrigeration unit comprises an evaporator, a temperature sensor to measure the temperature of the evaporator during a defrost function, and a controller configured to calculate the rate of temperature change and terminate the defrost function when the rate meets a specified criteria, such as a predetermined rate or a sharp increase in the rate after the evaporator temperature has increased above the freezing point of water. | 02-23-2012 |
20120055179 | DSM DEFROST DURING HIGH DEMAND - A method includes providing a standard supply of electrical power to a defrost heater during a standard defrost cycle for a refrigeration system of an appliance, detecting a high energy demand period during the standard defrost cycle, and enabling a reduced consumption of electrical power by the defrost heater in a low power defrost cycle. | 03-08-2012 |
20120055180 | ISOLATED COLD PLATE REFRIGERATION SYSTEM WITH USER SELECTED TEMPERATURE CONTROL - An isolated cold plate refrigeration system provides a cargo compartment isolated from a cold plate compartment. A user defines the target temperature of the cargo compartment. When the temperature of the cargo compartment rises above the target temperature and cool air is required to reduce the temperature of the cargo compartment, a cold plate fan is activated to move air from the cold plate compartment to the cargo compartment and from the cargo compartment to the cold plate compartment. | 03-08-2012 |
20120055181 | Cooling system and defrosting control method thereof - A cooling system including an evaporator to exchange heat with air, a frost detector installed on the evaporator to detect frost, and a control unit to determine whether a current time corresponds to a frost detection point, to control the frost detector to operate when the current time corresponds to the frost detection point, and to control a defrosting operation based on a frost detection signal from the frost detector. It is possible to accurately detect the amount of frost formed on the evaporator by executing the frost detection under constant frost detection environmental conditions. | 03-08-2012 |
20120102984 | Refrigerator and dehumidification control mehod thereof - A refrigerator and a dehumidification control method thereof to effectively perform both temperature compensation and dehumidification so as to prevent formation of dewdrops in a refrigerating compartment of the refrigerator. The control method includes detecting a temperature of outside air around the refrigerator to judge whether or not the detected temperature corresponds to a low-temperature mode requiring dehumidification, heating a refrigerating compartment by operating a refrigerating compartment heater and a refrigerating compartment fan for dehumidification if the low-temperature mode is judged, cooling the refrigerating compartment by operating a compressor while continuously operating the refrigerating compartment fan, and simultaneously cooling and heating the refrigerating compartment to enable simultaneous implementation of temperature compensation by heating of the refrigerating compartment and dehumidification by cooling of the refrigerating compartment. | 05-03-2012 |
20120159973 | CONDENSATE DRAIN ASSEMBLY - The invention provides a condensate drain assembly comprising one or more reservoirs, a conduit, and a port defining an inlet to a drip channel. The reservoir is preferably constructed to have a floor that is shaped in a manner that allows the collected condensate to be directed to the conduit. For example, the floor may be partially concave and defined by a highest point at an inside wall of the reservoir that is about opposite to the entrance to the conduit and a lowest point at a bottom of the entrance to the conduit. Additionally, the floor at the entrance to the conduit may be further defined by a cone that is open at a top and a side entering the conduit to allow the condensate to be funneled to the conduit from the reservoir. | 06-28-2012 |
20120192577 | Wear-Leveling For Components of an Auxiliary Heat Source - In at least some embodiments, an air handler includes a coil and a fan. The air handler also includes an auxiliary heat source having a plurality of heat elements. The auxiliary heat source implements a wear-leveling algorithm to cycle use of the heat elements over multiple auxiliary heat cycles. | 08-02-2012 |
20120198863 | VARIABLE POWER DEFROST HEATER - A refrigeration appliance includes a storage compartment. An evaporator cools the storage compartment. A defrost heater is associated with the evaporator. A temperature sensor senses an evaporator temperature and generates a temperature signal based on the evaporator temperature. A controller receives the temperature signal and generates a defrost heater power control signal. A power supply receives the defrost heater power control signal and controls a power level supplied to the defrost heater based on the defrost heater power control signal. A first power level is supplied to the defrost heater during a first heating interval of a defrosting operation, and, based on an evaporator temperature rise occurring during the first heating interval, the controller adjusts the defrost heater power control signal such that an adjusted power level is supplied to the defrost heater during a second heating interval of the defrosting operation. | 08-09-2012 |
20120198864 | SYSTEM, APPARATUS, AND METHOD FOR ICE DETECTION - A system, apparatus, and method for determining when an amount of ice formed on an evaporator or evaporator grid has reached a predetermined size are illustrated. An acoustic transmitter an acoustic transmitter positioned proximate to the evaporator channels acoustic signals emanating from the evaporator or evaporator grid to an acoustic sensor, which generates an electronic signal indicative of the acoustic signal. A receiver module coupled to the acoustic sensor is configured to receive the electronic signal and determine that ice formed on the evaporator has reached a predetermined size based on the electronic signal. | 08-09-2012 |
20120227423 | NETWORKED FREEZER STOCKING MANAGEMENT - A system for an ice merchandiser having a compressor in a compressor enclosure to cool the ice merchandiser includes a sensor disposed within the ice merchandiser, and a communications component disposed within the compressor enclosure and coupled to the sensor to receive signals from the sensor representative of the amount of ice in the ice merchandiser, wherein the communications component is configured to convert the received signals to a digital format and publish the signals via a network connection. | 09-13-2012 |
20120266615 | ADAPTABLE EVAPORATOR DEFROST LOGIC - Adaptable evaporator defrost logic is employed in a refrigeration system to detect a build-up of ice on the evaporator. In response to the detected build-up of ice, a defrost operation is initiated that includes decreasing the speed of the compressor. At the end of the defrost operation, the adaptable evaporator defrost logic determines whether the defrost operation was a success. If the defrost operation was a success, then normal operation is resumed. If the defrost operation was not a success, then the defrost operation is modified by turning the compressor off and extending a duration of the defrost operation. | 10-25-2012 |
20120266616 | MULTI-TYPE AIR CONDITIONER AND METHOD OF CONTROLLING THE SAME - A multi type air conditioner is provided that may include a plurality of indoor devices, each comprising an indoor heat exchanger, and a plurality of outdoor devices connected to the plurality of indoor devices, each comprising an outdoor heat exchanger. When a defrosting operation condition is satisfied during a heating operation, the plurality of outdoor devices may successively perform a defrosting operation. | 10-25-2012 |
20120279237 | AUXILIARY HEATER CONTROL DEVICE, HEATED FLUID UTILIZATION SYSTEM, AND AUXILIARY HEATER CONTROL METHOD - An auxiliary heater control device can be readily attached to a hot water heating system configured with a simple water circuit without a hot water storage tank, and is capable of preventing freezing of circulating water such that use of an auxiliary heater is minimized. When a sensed temperature tS sensed by a temperature sensor is in a range, a control device increases a rotational speed of a circulation pump. When the sensed temperature tS is in a range, the control device increases the rotational speed of the circulation pump and lowers an operating frequency of a compressor. When the sensed temperature tS is in a range, the control device increases the rotational speed of the circulation pump, lowers the operating frequency of the compressor, and activates an auxiliary heater. | 11-08-2012 |
20120318006 | DEFROST OPERATIONS AND APPARATUS FOR A TRANSPORT REFRIGERATION SYSTEM - Embodiments of apparatus, transport refrigeration units, and methods for operating the same can control defrost operations for a refrigerant vapor compression system. Embodiments can provide control for transitioning a refrigerant vapor compression system into and out of a defrost mode. | 12-20-2012 |
20130014521 | REDUCING OR AVOIDING ICE FORMATION IN AN INTERMITTENTLY OPERATED COOLING UNITAANM Lukasse; Leijn Johannes SjerpAACI EdeAACO NLAAGP Lukasse; Leijn Johannes Sjerp Ede NLAANM De Kramer-Cuppen; Janneke EmmyAACI BennekomAACO NLAAGP De Kramer-Cuppen; Janneke Emmy Bennekom NL - Disclosed is a system for and a method of reducing and/or avoiding ice formation inside a cooling space ( | 01-17-2013 |
20130019616 | HEAT ABSORBING DOOR FOR A REFRIGERATED MERCHANDISER - A door for a refrigerated merchandiser including a case that defines a product display area. The door includes a frame and a first glass pane coupled to the frame. The first glass pane has heat-absorbing glass and is configured to be positioned adjacent an ambient environment surrounding the refrigerated merchandiser to absorb radiation from the ambient environment. The door also includes a second glass pane coupled to the frame and configured to be positioned adjacent the product display area. The second glass pane includes a conductive coating. The door further includes a third glass pane positioned between and spaced from the first glass pane and the second glass pane, and has a low emissivity coating. | 01-24-2013 |
20130031917 | DEFROSTABLE HEAT EXCHANGING APPARATUS AND ASSOCIATED METHOD - A heat exchanging apparatus and an associated method are provided so as to permit a heat exchanger to be defrosted without being taken out of service. A defrostable heat exchanging apparatus includes a heat exchanger configured to cool gas flowing there through by heating a liquid also passing there through. The defrostable heat exchanging apparatus also includes a blockage positionable upstream of the heat exchanger with respect to the liquid so as to reduce flow of the liquid through a portion of the heat exchanger aligned with the blockage relative to the flow of the liquid through other portions of the heat exchanger. The defrostable heat exchanging apparatus may also include a positioning mechanism for moving the blockage relative to the heat exchanger. | 02-07-2013 |
20130042638 | REFRIGERATOR AND CONTROLLING METHOD THEREOF - The refrigerator of the present invention comprises: a refrigeration cycle composed of a compressor, a condenser and an expansion unit; an evaporator for evaporating a refrigerant which passes through the expansion unit; a heating unit for providing the heat for defrosting the evaporator; and a frost sensor unit which is provided at one side of the evaporator for sensing the amount of frost on the evaporator, and is characterized in that an operation of the frost sensor unit is started on the basis of whether operation conditions of the frost sensor unit are recognized and the heating unit selectively generates the heat according to the sensed result of the frost sensor unit. According to one embodiment of the present invention, the amount of frost on the evaporator is easily determined by the operation of the frost sensor unit and the evaporator is effectively defrosted according to the amount of frost determined thereby. | 02-21-2013 |
20130086928 | REFRIGERATOR AND CONTROL METHOD THEREOF - A refrigerator includes a low-temperature storage compartment damper to control supply of cool air to a low-temperature storage compartment, a high-temperature storage compartment damper to control supply of hot air to a high-temperature storage compartment, and a controller to control the low-temperature storage compartment damper to be opened and the high-temperature storage compartment damper to be closed while controlling a compressor and blowing fan to be driven so that the temperature of the low-temperature storage compartment reaches a low set temperature, to control the driving of the compressor and blowing fan to be stopped and the low-temperature storage compartment damper to be closed when the temperature of the low-temperature storage compartment reaches the low set temperature, and to control a defrosting heater and the blowing fan to be driven and the high-temperature storage compartment damper to be opened when the supply of cool air is stopped. | 04-11-2013 |
20130086929 | EVAPORATOR REFRIGERANT SATURATION DEMAND DEFROST - A method is disclosed for controlling initiation of a defrost cycle of an evaporator heat exchanger of a refrigeration system operatively associated with a refrigerated transport cargo box. The method includes the steps of establishing an return air-saturation temperature differential equal to the difference of a sensed air temperature of an air flow returning from the cargo box to pass over the heat exchange surface of the evaporator heat exchanger minus a refrigerant saturation temperature of a flow of refrigerant passing through the evaporator heat exchanger, comparing the return air-saturation temperature differential to a set point threshold defrost temperature differential, and if the return air-saturation temperature differential exceeds the set point threshold defrost temperature differential, initiating a defrost cycle for defrosting the evaporator heat exchanger. | 04-11-2013 |
20130098074 | HIGH PERFORMANCE REFRIGERATOR HAVING INSULATED EVAPORATOR COVER - A high performance refrigerator includes a cabinet with a refrigerated interior, an insulating cover separating a portion of the cabinet from the refrigerated interior, and a refrigeration fluid circuit having an evaporator located within the portion of the cabinet separated by the insulating cover from the refrigerated interior. The refrigerator also includes a controller that commands the refrigerator to perform a defrosting cycle when the evaporator coil requires defrosting. This defrosting cycle includes closing dampers in the insulating cover during the defrosting of the evaporator coil, thereby keeping the refrigerated interior thermally isolated from the evaporator during the defrost cycle. The controller is also operable to stop operation of a defrost heater when the evaporator reaches a first target temperature above the freezing point of water, and to re-open the dampers when the evaporator reaches a second target temperature above the freezing point of water. | 04-25-2013 |
20130098075 | HIGH PERFORMANCE REFRIGERATOR HAVING EVAPORATOR OUTSIDE CABINET - A high performance refrigerator includes a cabinet with a refrigerated interior, a refrigeration fluid circuit having an evaporator located within an insulated evaporator compartment outside the cabinet, and at least one damper that opens to permit air circulation from the refrigerated interior through the evaporator compartment. The refrigerator also includes a eutectic member configured to melt at an operating temperature of the refrigerator. The evaporator cools the refrigerated interior to a temperature below the operating temperature so that the eutectic member melts to cool the refrigerated interior or the evaporator compartment during a defrost cycle. The insulated evaporator cover limits heat transfer into the refrigerated interior during the defrost cycle to avoid temperature spikes in the refrigerated interior. | 04-25-2013 |
20130104576 | AIR CONDITIONER AND METHOD OF CONTROLLING THE SAME | 05-02-2013 |
20130104577 | DEFROSTING | 05-02-2013 |
20130139527 | Method for Controlling a Heating and Air Conditioning System in a Vehicle - A method is provided for controlling a heating and air conditioning system in a vehicle. The evaporator of the air conditioner is switched off below a predefined external temperature threshold in order to prevent the risk of icing. The external temperature threshold for switching off the evaporator as a function of the external temperature, is also defined, preferably variably, below the freezing point. | 06-06-2013 |
20130192280 | REFRIGERATOR AND DEFROSTING METHOD THEREOF - A refrigerator according to the present invention includes a compressor compressing a coolant, a condenser condensing the coolant compressed in the compressor, an expander through which the coolant condensed in the condenser passes, an evaporator evaporating the coolant expanded in the expander and cooling an inside of the refrigerator, a defroster defrosting the evaporator, a coolant adjusting valve adjusting the coolant flowing from the condenser to the evaporator, and a controller driving the compressor and turning on the defroster after closing the coolant adjusting valve. The refrigerator may minimize power consumed for defrosting and the defrosting time. | 08-01-2013 |
20130199218 | ICING PROTECTION SYSTEM FOR AN AIRCRAFT AND METHOD FOR OPERATING AN ICING PROTECTION SYSTEM - An icing protection system comprises a fuel cell, an evaporative cooling system, a thermal deicing device, a control unit and a device for measuring the pressure in the evaporative cooling system. The evaporative cooling system is in thermal contact with the fuel cell and with the thermal deicing device in order to conduct heat from the fuel cell to the thermal deicing device. The control unit controls the electrical power demanded from the evaporatively cooled fuel cell in dependence on a deviation of the pressure measured by the pressure measuring device from a predetermined NOMINAL pressure. In this way, an energetically very efficient and very well controllable icing protection system is made available that can be operated without bleed air supplied by engines or electrical energy provided by engine generators. | 08-08-2013 |
20130227973 | HEAT PUMP SYSTEM FOR VEHICLE AND METHOD OF CONTROLLING THE SAME - Disclosed therein are a heat pump system for a vehicle and a method of controlling the heat pump system, which determines that frosting begins on an exterior heat exchanger and carries out a defrosting control if a difference value between outdoor temperature and refrigerant temperature of an outlet side of the exterior heat exchanger is above a frosting decision temperature in a heat pump mode, thereby increasing frost-prevention and defrosting effects and enhancing heating performance and stability of the system because the system recognizes the beginning of frosting on the exterior heat exchanger at a proper time so as to carry out the defrosting control. | 09-05-2013 |
20130239596 | AIR CONDITIONER AND METHOD OF CONTROLLING THE SAME - An air conditioner and a method for controlling the same for securing reliability and increasing efficiency are provided. The air conditioner and the method of controlling the same detect freezing occurring in the heat exchanger of the outdoor unit, determine a time of the defrosting operation according to a freezing degree such that the defrosting operation is performed, thereby preventing cooling/heating operation efficiency and capability due to a frequent defrosting operation from being deteriorated. The air conditioner and the method of controlling the same according to the present invention provide comfort of a predetermined level to the user to solve deterioration of convenience, and remove freezing due to a defrosting operation to thereby improve efficiency during cooling/heating operations. | 09-19-2013 |
20130247598 | Current Limit Control On A Transport Refrigeration System - A method for controlling the operation of a transport refrigeration system to limit current drawn by a compressor powered by AC electric current includes the steps of: (a) determining whether an ambient temperature in which the refrigeration unit is operating has been greater than a set point ambient temperature for a first time period; (b) determining whether the refrigeration unit has been operating in a temperature pulldown mode; (c) determining whether the AC electric current is equal to or exceeds a preset maximum current limit; (d) determining whether a time period between a last defrost cycle and a next previous defrost cycle is less than fifteen minutes; and (e) if the determination is YES in both of step (a) and step (b) and is also YES in at least one of step (c) and step (d), reducing the preset maximum current limit to a reset maximum current limit. | 09-26-2013 |
20130305748 | ICEPHOBIC COATING ON THE CONDENSER COLD SIDE - An icephobic coating is disposed on at least a cold side of a condenser in an environmental control system (ECS) of an aircraft. By applying the icephobic coatings to the condenser, the adhesive strength of the ice can be significantly reduced. As a result, it is difficult for ice to stick on the condenser. The vibration in the system and the force of the air flow can then knock the ice particles off of the condenser, resulting in reduced ice buildup. | 11-21-2013 |
20130305749 | DSM ENABLING OF ELECTRO MECHANICALLY CONTROLLED REFRIGERATION SYSTEMS - An energy saving defrost control system for reducing power consumption of an electromechanically controlled refrigerator is provided. The system includes a defrost timer configured to control a compressor according to an established run time, a defrost heater control operatively connected to the defrost timer and configured to activate a defrost heater in response to a timeout by the defrost timer, a DSM module responsive to demand state signals from an associated utility indicative of at least a peak demand and off peak demand state, and a time delay latching relay comprising a timer and configured to switch to one of a low position and a high position based on the demand state signal. | 11-21-2013 |
20130327070 | CONTROL SYSTEM FOR A REFRIGERATED MERCHANDISER - A refrigerated merchandiser including a case defining a product display area supporting product and an evaporator disposed in an air passageway in fluid communication with the product display area via an outlet to direct a refrigerated airflow into the product display area. The merchandiser also includes a control system in communication with and programmed to control the refrigeration system so that the product display area is maintained within a predetermined temperature range. The control system also varies the temperature of the refrigerated airflow through the outlet above an airflow temperature threshold between about 35 degrees Fahrenheit and 41 degrees Fahrenheit at least once during a predetermined time period to avoid formation of frost on the evaporator while maintaining the product display area within the predetermined temperature range. | 12-12-2013 |
20140026600 | HVAC SYSTEM OF AN AUTOMOTIVE VEHICLE AND METHOD OF OPERATING THE SAME - A climate control system for the interior cabin of an automotive vehicle. The climate control system includes a mode selection device configured for selecting a defrost mode. When the system is in the defrost mode, a controller receives a signal from a humidity sensor indicative of the measured humidity level in the vicinity of the window. The controller compares this measured humidity level with a threshold humidity level and, if the humidity is below the threshold humidity level, the controller stops operation of a compressor being used to dehumidify the air being provided to defrost the window, thereby minimizing possible fogging of the window and increasing the efficiency of the vehicle. | 01-30-2014 |
20140033744 | COOLING APPARATUS AND CONTROL METHOD THEREOF - Disclosed herein are a cooling apparatus and a control method thereof. The cooling apparatus using latent heat of a refrigerant includes evaporators evaporating the refrigerant, a compressor compressing the evaporated refrigerant to a high pressure, defrosting heaters removing frost accumulated on the evaporators, a driving unit providing driving current selectively to the compressor or the defrosting heaters, and a control unit controlling the driving unit to provide driving current to the compressor in a cooling operation mode and controlling the driving unit to provide driving current to the defrosting heaters in a defrosting operation mode. The cooling apparatus controls the defrosting heaters using a driving circuit controlling the compressor, and thus lowers the manufacturing costs of a refrigerator operated at DC power. | 02-06-2014 |
20140053580 | Systems and methods for potable water production - Systems and methods are disclosed for water collection from atmospheric moisture in large quantities in uncontrolled outdoor environments where the temperature may be cold and humidity levels low. To extract water from air when the dew point is low, a heat exchanger cools to a point where water vapor is deposited on its surface as ice. The heat exchanger then cycles through a heating phase to melt the ice and generate liquid water. The accumulation of frost is advantageous. Frost accumulation enables water collection when the dew point is low. Disclosed variations enhance efficiency and environmental tolerance. | 02-27-2014 |
20140053581 | COOLING APPARATUS AND CONTROL METHOD THEREOF - A cooling apparatus includes a storage compartment, an evaporator to cool air in the storage compartment by evaporating a refrigerant, a compressor to compress the refrigerant evaporated by the evaporator, an air blower to supply the air cooled by the evaporator to the storage compartment and to remove frost formed on the evaporator, a storage temperature sensor to sense a temperature of the storage compartment, a driving unit to drive the compressor and the air blower, and a controller to perform a defrosting operation of operating the air blower to remove frost formed on the evaporator when a cooling operation of cooling the storage compartment is terminated and to perform the cooling operation, wherein the controller defers, when the defrosting operation is being performed, operation of the compressor, even if the temperature of the storage compartment is greater than or equal to the storage upper limit temperature. | 02-27-2014 |
20140069125 | SYSTEMS, METHODS, AND APPARATUS FOR PREVENTING CONDENSATION IN REFRIGERATED DISPLAY CASES - Systems, methods, and apparatuses are provided for preventing condensation in refrigerated display cases. A display case can be provided with one or more heater circuits and one or more sensors communicably coupled thereto. The sensor can sense ambient humidity levels, ambient temperature levels, and surface temperature levels. In certain embodiments, dewpoint temperatures may be calculated based on the ambient humidity and temperature levels provided by the sensor. The sensed ambient humidity level, temperature level, surface temperature, or calculated dewpoint can be compared to preset trigger levels and at least one of the heater circuits can be activated if the preset trigger level is violated. Activation of the heater circuit can be for a predetermined amount or percentage of time or at a predetermined voltage level based on the sensed or calculated level or the amount the sensed or calculated level is over the preset trigger level. | 03-13-2014 |
20140096545 | DUAL TEMPERATURE REFRIGERATED MERCHANDISER - A merchandiser system includes a case that has a door and a door heater. The system includes a low temperature refrigeration unit sized to fit within a case compartment and to operably couple to the case to maintain food product within a low temperature range. The system also includes a medium temperature refrigeration unit sized to fit within the compartment and operably couple to the case to maintain food product within a medium temperature range. The system includes a controller in communication with the door heater and is programmed to activate the door heater only in response to the low temperature modular refrigeration unit positioned within the compartment. One of the low temperature refrigeration unit and the medium temperature refrigeration unit is removably coupled to the case within the compartment, and is replaceable by the other refrigeration unit to change the temperature range of the product display area. | 04-10-2014 |
20140123690 | METHOD FOR IMPROVING EFFICIENCY OF A REFRIGERATOR APPLIANCE DURING A DEFROST CYCLE - A method for operating a refrigerator appliance during a defrost cycle of the refrigerator appliance is provided. The method includes deactivating a compressor of the refrigerator appliance at a beginning or commencement of the defrost cycle until a predetermined period of time elapses or a chilled chamber of the refrigerator appliance rises to a preselected temperature. The method can improve an energy efficiency of the refrigerator appliance. | 05-08-2014 |
20140137580 | Method And System For Transport Container Refrigeration Control - A method of refrigeration control through a refrigeration system of a refrigerated transport container includes performing a defrost cycle on the refrigeration system by activating a heat source; and restarting the refrigeration system after the defrost cycle has completed, wherein restarting the refrigeration system includes performing a liquid slugging avoidance process including: initiating a compressor of the refrigeration system at a speed; opening a pressure equalization valve in parallel with the compressor in response to the initiating; opening a liquid valve in series between a condenser and an evaporator after opening of the pressure equalization valve; and closing the pressure equalization valve after a period of time. | 05-22-2014 |
20140150477 | Defrost Control Using Fan Data - In various implementations, frost in a vapor compression system may be controlled. A property of a fan may be determined. A determination may be made whether a frost event and/or a nonfrost event has occurred based at least partially on the determined fan property. | 06-05-2014 |
20140150478 | Ice Sensor For a Heat Pump - In various implementations, an ice sensor may include heater(s), ice accumulation surface(s), and/or temperature sensor(s). During operation, heat from a heater may be provided to an ice accumulation surface and a temperature sensor(s) may determine temperature(s) of the ice accumulation surface. A determination of whether ice is present on the ice sensor may be based at least partially on the determined temperature(s). | 06-05-2014 |
20140150479 | Secondary Defrost for Heat Pumps - Frost may accumulate on a heat pump. In various implementations, a primary defrost operation and/or a secondary defrost operation may be utilized to remove at least a portion of the frost from the heat pump. | 06-05-2014 |
20140157800 | REFRIGERATOR AND METHOD FOR OPERATING THE SAME - A refrigerator including an evaporator to carry out heat exchange, a frost sensing unit to sense an amount of frost formed on the frost sensing unit, and a heater to be operated for removing the frost from the frost sensing unit is provided. The heater is operated in at least a portion of a defrosting section. Methods for operating the refrigerator are also provided. | 06-12-2014 |
20140165628 | AIR-CONDITIONING APPARATUS AND CONTROL METHOD THEREFOR - An order in which parts of a heat source side heat exchanger are defrosted is determined on the basis of the heat exchanger capacity of the parts of the heat source side heat exchanger, the necessary heating capacity of the parts of the heat source side heat exchanger, and the arrangement of the parts of the heat source side heat exchanger, the opening and closing of first flow switching valves, second flow switching valves, and third flow switching valves are controlled accordingly, and a defrosting operation in which a refrigerant discharged from a compressor is caused to flow through the heat source side heat exchanger is performed. | 06-19-2014 |
20140165629 | METHOD FOR CONTROLLING THE DEFROST OF AN EVAPORATOR IN A REFRIGERATION APPLIANCE - A method for controlling evaporator defrost in a refrigeration appliance having a cooling circuit with a variable cooling capacity compressor is disclosed. The method includes assessing the cooling capacity of the cooling circuit and calculating the defrost time on the basis of such cooling capacity. Defrost time is preferably assessed on the basis of the inverter frequency driving the compressor and/or the percentage of insertion of the compressor. | 06-19-2014 |
20140165630 | METHOD FOR CONTROLLING DEFROST OPERATION OF A REFRIGERATION SYSTEM - The invention relates to a method for controlling a refrigeration system by establishing a defrost period during an initial defrost period. One or more compressors of the refrigeration system are monitored to establish if the one or more compressors are running, and a parameter representative of the one or more compressors running is monitored. The monitoring establishes at least one parameter limit value representative of whether a defrost period or a non-defrost period is to be initiated. The invention also relates to a method for controlling a refrigeration system subsequent to an electrical power interruption. The invention also relates to control units for applying one or both of the methods according to the invention, and to a refrigeration system having one or more control units controlling the refrigeration system according to one or both of the methods. | 06-19-2014 |
20140216078 | REDUCED ENERGY HEAT PUMP DEFROST FOR UNOCCUPIED SPACE - Embodiments are directed to determining, by a controller comprising a processor, that a coil associated with a heat pump is subjected to a defrost cycle, determining, by the controller, that at least one of: a conditioned space is occupied, and a thermostat associated with the conditioned space indicates that an energy saving mode is not in use, and enabling, by the controller, an auxiliary heat source based on the determination that the coil is subject to the defrost cycle and the determination that the conditioned space is occupied or the thermostat indicates that the energy saving mode is not in use. | 08-07-2014 |
20140245759 | DEFROSTING APPARATUS AND DEFROSTING METHOD - The present invention relates to a defrosting apparatus comprising a vessel which is partially filled with the product to be defrosted and which rotates and/or comprises means to move the product during defrosting. | 09-04-2014 |
20140260360 | ANTI-FOG HEAT CONTROL FOR A REFRIGERATED MERCHANDISER - A refrigerated merchandiser includes a sensor coupled to a case adjacent an air inlet. The sensor is in communication with a portion of a refrigerated airflow passing through the air inlet to sense a temperature of the airflow and to generate a signal indicative of an air return temperature. The merchandiser also includes a controller in communication with the sensor to receive the signal indicative of the air return temperature, the controller further in communication with a conductive film on a door and programmed to initiate a clearing interval to clear condensation from the door in response to the signal indicative of the air return temperature reaching a first predetermined temperature threshold. | 09-18-2014 |
20140260361 | REFRIGERATION APPARATUS AND METHOD - An energy management system may include a refrigeration apparatus. Heat rejected from that apparatus may be used for heating elsewhere. There may be cooling loads which may be prone to frosting. A defrosting apparatus is provided. It is segregated from the coolant distribution array. Recaptured heat of the refrigeration apparatus may be used to defrost the cooling load heat exchangers, in an alternating or cycling mode, as may be. The apparatus may be electronically controlled. Ammonia may be used in a primary refrigeration vapour cycle system. The apparatus may also use a secondary cooling loop or system, linked to the primary system. The secondary system may be a distribution system. The secondary system may use CO | 09-18-2014 |
20140260362 | HEAT EXCHANGER, HEAT RECOVERY VENTILATOR INCLUDING THE SAME, AND METHOD FOR DEFROSTING AND CHECKING OPERATIONS THEREOF - The present invention relates to a heat exchanger, a method for manufacturing the same, a heat recovery ventilator (HRV) including the same, and a method for defrosting and checking operations thereof. | 09-18-2014 |
20140283538 | Method and Apparatus for Initiating Coil Defrost in a Refrigeration System Evaporator - A system for controlling the defrost cycle of an evaporator comprising a sensor in the coil of an evaporator or downstream of the coil, the sensor configured to determine changes in the liquid mass ratio of the refrigerant in the evaporator. The difference in liquid mass ratio relating to frost buildup on the outside of said evaporator. When the difference in liquid mass ratio reaches a predetermined amount, corresponding to an unsatisfactory frost buildup, a defrost cycle is initiated. When the liquid mass ratio returns to a value that corresponds to a defrosted evaporator, the defrost cycle is discontinued. | 09-25-2014 |
20140305145 | HOUSEHOLD APPLIANCE, SYSTEM AND METHOD OF CONTROLING HOUSEHOLD APPLIANCES - A control system and a control method for controlling input voltages ( | 10-16-2014 |
20140326005 | Galley Cooling Heat Exchanger Defrost Mechanism - A galley chiller system configured to operate in a defrost mode is provided including a cooling module, a heating element, and a fan module. The cooling module is configured to provide cool air to at least one galley monument. The cooling module includes a heat exchanger configured to have both air and a liquid coolant flow there through in a heat transfer relationship. The heating element is arranged generally adjacent a coolant inlet of the heat exchanger. The fan module is configured to circulate warm return air from the at least galley monument to the cooling module. When the galley chiller system is in the defrost mode, only liquid coolant flows through the heat exchanger. The liquid coolant is locally heated by the heating element. | 11-06-2014 |
20140331698 | AIR CONDITIONER CONDENSATE COLLECTOR - A condensate collector for an air conditioner window unit. The condensate collector includes a pan including walled sides. Two or more connectors are provided for connecting the condensate collector to the air conditioner window unit. A first one of the connectors is located on one side of the pan and a second one of the connectors is located on an opposite side of the pan from the first one of the connectors. A sponge is removably positioned within the pan, and a drain is provided including an aperture in the pan. A method of collecting condensate from an air conditioner window unit is further provided. | 11-13-2014 |
20140352335 | ADAPTIVE DEFROST - Adaptive defrost systems, computer program products, and methods are provided. A defrost cycle is initiated, and an actual time of defrost (TOD) is determined based on the defrost cycle. Additionally, a first time between defrost (TBD) between defrost cycles is determined. A variable increment time between defrost (TBDInc) is calculated based at least partially on the ideal time of defrost and the actual time of defrost. The TBD is incremented by TBDInc, resulting in a new TBD, which may be used to initiate the next defrost cycle. | 12-04-2014 |
20150027144 | AIR CONDITIONER AND CONTROL METHOD THEREOF - An air conditioner, having an outdoor unit and an indoor unit, to perform a heating operation and a defrosting operation, the air conditioner including a detection unit to detect a state of at least one selected between the outdoor unit and the indoor unit and to output the detected value, a controller to determine whether the air conditioner is in a stable state when the defrosting operation is completed and, upon determining that the air conditioner is in the stable state, to control the detected value output from the detection unit to determine entry time of the next defrosting operation, and a storage unit to store a value detected in the stable state. The entry time of the defrosting operation is accurately determined, thereby minimizing the number of times of the defrosting operation during the heating operation. | 01-29-2015 |
20150033773 | REFRIGERATOR AND OPERATING METHOD THEREOF - A refrigerator, where warm air is prevented from flowing into a storage chamber during defrosting or when cooling starts, heat transfer from a cooling chamber to the storage chamber is prevented, and the temperature rise in the storage chamber is constrained to a low level. A separator is used to divide a part of an air supply passage, to form a space portion in communication with a cooling chamber through an air supply opening portion. A first freely controllable opening portion is disposed in a separating area between the space portion and the divided air supply passage, and a second freely controllable opening portion is disposed in a separating area between the space portion and an air return passage or the cooling chamber. By setting the first and second opening portions in closed and open states, respectively, a condenser performs cooling and an air blower supplies air. | 02-05-2015 |
20150047375 | DEFROST OPERATION MANAGEMENT IN HEAT PUMPS - In various implementations, a heat pump may include heating operations and defrost operations. The heat pump may monitor cycle time(s) for one or more of the operations. Defrost operation(s) in the heat pump may be automatically adjusted based at least partially on cycle times. | 02-19-2015 |
20150075192 | AIR CONDITIONING SYSTEM AND DEFROSTING OPERATION METHOD - Temperature sensors detect an outdoor air temperature and a heat exchanger temperature of an outdoor unit, and a human detection sensor detects presence of a person in an air blowable region of each indoor unit. A control section selectively executes a first defrosting operation mode in which a defrosting operation is performed while fans of all the indoor units are stopped, and a second defrosting operation mode in which, when a frost formation amount in the heat exchanger is estimated to exceed a threshold value on the basis of the temperatures detected by the first and second temperature sensors, the indoor unit for which the human detection sensor detects no person in its air blowable region is preferentially selected, and a defrosting operation is performed while the fan of the indoor unit is forcibly operated. Such an air conditioning system and a defrosting operation method reduce time required for defrosting. | 03-19-2015 |
20150089966 | USING WEATHER DATA IN HEAT PUMP DEFROST CONTROL - A method of operating a heat pump system is provided, the heat pump system having at least a controller and configured to operate at least two defrost cycles. The method comprises receiving, at the controller, weather data for a defined geographic area proximate to an installed location of the heat pump system; and selecting, based on said weather data, one of the at least two defrost cycles. | 04-02-2015 |
20150121912 | SYSTEM AND METHOD FOR ENERGY-SAVING INDUCTIVE HEATING OF EVAPORATORS AND OTHER HEAT-EXCHANGERS - A novel method of deicing utilizing a fins-on-tubes type evaporator/heat exchanger system that is optimized for energy-saving inductive heating thereof, by configuring it to increase its resistance to a value at which the system's reactance at its working frequency is comparable to its electrical resistance. The system includes a set of tubes configured for flow of cooling material therethrough, and also includes a set of fins positioned and disposed perpendicular to, and along, the tubes, in such a way that at least a portion of the fins comprises longitudinal excisions therein. | 05-07-2015 |
20150143825 | DEFROST OPERATION MANAGEMENT - In various implementations, defrost operations may be managed. A change in the temperature of a heat exchanger may be determined. A determination whether to allow a defrost operation may be at least partially based on the determined change in the temperature of the heat exchanger. | 05-28-2015 |
20160018154 | SENSOR FOR COIL DEFROST IN A REFRIGERATION SYSTEM EVAPORATOR - A system for controlling the defrost cycle of an evaporator comprising a sensor in the coil of an evaporator or downstream of the coil, the sensor configured to determine changes in the liquid mass ratio of the refrigerant in the evaporator. The difference in liquid mass ratio relating to frost buildup on the outside of said evaporator. When the difference in liquid mass ratio reaches a predetermined amount, corresponding to an unsatisfactory frost buildup, a defrost cycle is initiated. When the liquid mass ratio returns to a value that corresponds to a defrosted evaporator, the defrost cycle is discontinued. | 01-21-2016 |
20160025404 | ANTI-CONDENSATION CONTROL SYSTEMS AND METHODS - The embodiments disclosed herein provide an electronic control system for adjusting power to a heater to prevent condensation from forming on, for example, one or more glass windows on the one or more doors of one or more refrigeration units. The control system can adjust the amount of heat applied to the one or more glass windows based on the ambient temperature outside the one or more refrigeration units, the ambient humidity outside the one or more refrigeration units, a target refrigeration temperature for the one or more refrigeration units, the structure of the one or more door windows, and/or a property of the one or more heaters, such as the maximum heating capacity of the one or more heaters. | 01-28-2016 |
20160061504 | Variable Speed Compressor Control with Sound-Controlled Defrost Mode - A drive controller for a motor of a compressor includes a drive circuit that applies voltages to windings of the motor. The drive controller includes a speed control module that controls the drive circuit to rotate the motor at a requested speed. The drive controller includes a speed determination module that generates the requested speed. The drive controller includes a defrost module that enables a defrost mode in response to a defrost command. While the defrost mode is enabled, the defrost module causes the speed determination module to (i) ramp the requested speed down from a speed demand to a defrost speed and (ii) maintain the requested speed at the defrost speed for a predetermined period of time. | 03-03-2016 |
20160075211 | METHOD AND SYSTEM FOR DEFOGGING OF VEHICLE - A method for defogging of a vehicle includes: determining whether the defogging of the vehicle is necessary based on at least any one of an outdoor temperature, an operation state of a cooler of an air conditioner, and an operation state of a blower of the air conditioner; defogging to control an air direction mode to add or increase an air volume supplied to a window if it is determined that the defogging of the vehicle is necessary. The air direction mode is maintained in a current state if it is determined that the defogging of the vehicle is not necessary. | 03-17-2016 |
20160084565 | REFRIGERATOR APPLIANCE AND METHOD OF OPERATING A REFRIGERATOR APPLIANCE - The present invention provides a refrigerator appliance and for operation of a refrigerator appliance. The refrigerator appliance and method of operating a refrigerator appliance include features for regulating the time between evaporator defrost cycles to efficiently defrost the evaporator. Features are also included for increasing the temperature of refrigerant circulating through a refrigeration system of the refrigerator appliance to prevent condensation on outer surfaces of the refrigerator. | 03-24-2016 |
20160084566 | REFRIGERATOR AND CONTROLLING METHOD THEREOF - A refrigerator including a compressor, a condenser, and an expansion unit that constitute a refrigeration cycle, an evaporator that evaporates a refrigerant that has passed through the expansion unit, a heating unit that provides heat for defrosting the evaporator, and a frost sensor unit that is provided at one side of the evaporator to sense the amount of frost on the evaporator, the frost sensor unit including a sound-source transmitting unit that generates a sound-source of a first volume to the evaporator, and a sound-source receiving unit that receives a sound-source of a second volume formed after the sound-source transmitted by the sound-source transmitting unit reflects from or passes through the evaporator, and a controller that controls the heating unit to generate heat, when the difference between the first volume and the second volume reaches a predetermined value. | 03-24-2016 |
20160116203 | SCHEDULING DEFROST EVENTS AND LINKING REFRIGERATION CIRCUITS IN A REFRIGERATION SYSTEM - Methods, devices, and systems for scheduling defrost events and linking refrigeration circuits in a refrigeration system are described herein. One method includes receiving, by a computing device, a number of defrost events per day for a refrigeration circuit, a duration for each of the number of defrost events, a start time for an initial one of the number of defrost events, and a maximum number of concurrent defrost events for the refrigeration system, determining, by the computing device, a defrost event schedule for the refrigeration circuit based on the number of defrost events per day, the duration for each of the number of defrost events, the start time for the initial one of the number of defrost events, and the maximum number of concurrent defrost events, receiving, by the computing device, an adjustment to the determined defrost event schedule, and updating, by the computing device, the defrost event schedule based on the adjustment. | 04-28-2016 |
20160123649 | DEFROSTING APPARATUS, REFRIGERATOR INCLUDING THE SAME, AND CONTROL METHOD THEREOF - A defrosting apparatus includes: an evaporator; a defrosting heater removing frost formed on the evaporator; and a controller controlling the defrosting heater until defrosting for the evaporator is completed when a driving start command for the defrosting apparatus is input, wherein the controller controls the defrosting heater to have an idle section in which the defrosting heater is not operated between a point in time in which the driving start command is input and a point in time in which the defrosting is completed. | 05-05-2016 |
20220136749 | UNIT COOLER WITH STAGGERED DEFROST ON A PLURALITY OF EVAPORATOR COILS - An HVAC system includes a unit cooler, which includes a first evaporator coil, a second evaporator coil, and a blower. The HVAC system further includes a first sensor, a second sensor, a first valve, a second valve, and a controller. The controller actuates the blower to direct air to flow over the first evaporator coil and the second evaporator coil, receives measurements from the first sensor and the second sensor, initiates a defrost cycle for the first evaporator coil by transmitting instructions to close the first valve to prevent the flow of refrigerant into the first evaporator coil, transmits instructions to open the first valve when the defrost cycle for the first evaporator coil has terminated, and initiates a defrost cycle for the second evaporator coil by transmitting instructions to close the second valve to prevent the flow of refrigerant into the second evaporator coil. | 05-05-2022 |