Class / Patent application number | Description | Number of patent applications / Date published |
062151000 | Defrosting | 80 |
20090031737 | Refrigeration System - A refrigerant circuit ( | 02-05-2009 |
20090173091 | Multi-range composite-evaporator type cross-defrosting system - The present invention provides a multi-range composite-evaporator type cross-defrosting system for continuous heating operation under an environment temperature range from 20 degree to negative 40 degree Celsius. Said system employs a combination of two defrosting methods under different temperature and humidity conditions; the first defrosting method is used for the outdoor temperature range of 20 degree Celsius to 0 degree Celsius, the second defrosting method is used in the outdoor temperature range of 10 degree Celsius to negative 40 degree Celsius, and a control system will adjust the appropriate threshold for switching between the two defrosting methods. | 07-09-2009 |
20090173092 | Cross-reverse type air-conditioning system - The present invention provides an air-conditioning system capable of continuous heating operation over an outdoor temperature range of 20 degree to negative 40 degree Celsius. The present invention utilizes at least two sets of the evaporators capable of cross-reverse refrigerant circulation and cross-air defrosting process, which alternately generates the heat energy required for the defrosting process and the air-conditioning, and said air-conditioning system can apply a combination of the two defrost methods to raise overall heating efficiency. | 07-09-2009 |
20100107667 | Refrigerant Evaporators With Pulse-Electrothermal Defrosting - An pulse electro thermal defrost evaporator system has multiple refrigerant tubes formed from an electrically conductive metal and connected in parallel for refrigerant flow. These tubes are, however, connected electrically in series. A controller is capable of detecting ice accumulation and connecting the tubes to a source of electrical power for deicing when it is necessary to deice the tubes. Embodiments having a manifold having multiple conductive sections insulated from each other are disclosed for coupling tubes electrically in series. Alternative embodiments with a single, long, wide-bore, tube are disclosed, as are embodiments having an evaporating pan coupled in series or parallel with the tubes, and embodiments with thermal cutoff and electrical safety interlocks. | 05-06-2010 |
20100326102 | INSULATED ICE COMPARTMENT FOR BOTTOM MOUNT REFRIGERATOR WITH CONTROLLED DAMPER - A refrigerator includes a refrigerator cabinet, a fresh food compartment disposed within the cabinet, a freezer compartment disposed within the cabinet, an ice compartment disposed within the cabinet, and an electronic control system associated with the refrigerator and adapted to monitor and control the fresh food compartment, the freezer compartment and the ice compartment. The control system provides for energy efficient control and operation through various means, including by monitoring state of an ice maker associated with the ice compartment and controlling temperature within compartments of the refrigerator based on the ice maker state. A damper controls air flow between the fresh food and freezer compartments. The control system can direct heat to the damper if the damper becomes frozen. | 12-30-2010 |
20110000237 | INSULATED ICE COMPARTMENT FOR BOTTOM MOUNT REFRIGERATOR WITH CONTROLLED DAMPER - A refrigerator includes a refrigerator cabinet, a fresh food compartment disposed within the cabinet, a freezer compartment disposed within the cabinet, an ice compartment disposed within the cabinet, and an electronic control system associated with the refrigerator and adapted to monitor and control the fresh food compartment, the freezer compartment and the ice compartment. The control system provides for energy efficient control and operation through various means, including by monitoring state of an ice maker associated with the ice compartment and controlling temperature within compartments of the refrigerator based on the ice maker state. A damper controls air flow between the fresh food and freezer compartments. The control system can direct heat to the damper if the damper becomes frozen. | 01-06-2011 |
20110000238 | INSULATED ICE COMPARTMENT FOR BOTTOM MOUNT REFRIGERATOR WITH CONTROLLED DAMPER - A refrigerator includes a refrigerator cabinet, a fresh food compartment disposed within the cabinet, a freezer compartment disposed within the cabinet, an ice compartment disposed within the cabinet, and an electronic control system associated with the refrigerator and adapted to monitor and control the fresh food compartment, the freezer compartment and the ice compartment. The control system provides for energy efficient control and operation through various means, including by monitoring state of an ice maker associated with the ice compartment and controlling temperature within compartments of the refrigerator based on the ice maker state. A damper controls air flow between the fresh food and freezer compartments. The control system can direct heat to the damper if the damper becomes frozen. | 01-06-2011 |
20110113800 | Vehicle Air-Conditioning Apparatus - A vehicle air-conditioning apparatus, including: a refrigerant circulation channel that flows a refrigerant, the refrigerant circulation channel provided in a refrigeration cycle system including, as connected in a cyclic pattern, a compressor for the refrigerant, an outdoor heat-exchanger exchanging heat between the refrigerant and an outdoor air, an expansion valve reducing pressure of the refrigerant, and an air-conditioning heat-exchange circuit exchanging heat between the refrigerant and air to be introduced into a vehicle interior; and an equipment heat-exchange circuit connected in parallel to the circuit and exchanging heat between the refrigerant and in-vehicle equipment. The circuit includes a cooling heat-transfer medium circulation channel that circulates a heat-transfer medium for cooling. The cooling channel has a cooling heat-exchanger exchanging heat between the refrigerant in the channel and a cooling heat-transfer medium for cooling the in-vehicle equipment and a cooling circulation pump for circulating the cooling heat-transfer medium. | 05-19-2011 |
20110154839 | REFRIGERATING APPARATUS - An object of the present invention is to keep an appropriate high pressure side pressure in a refrigerant circuit while reducing noises of an operation of a blower in a refrigerating apparatus which obtains a critical pressure on a high pressure side. The refrigerating apparatus in which the refrigerant circuit is constituted of a compressor, a gas cooler, reducing means and an evaporator to obtain a supercritical pressure on the high pressure side comprises a blower which air-cools the gas cooler and a control device which controls this blower. This control device controls a revolution speed of the blower based on an outdoor temperature and an evaporation temperature of a refrigerant in the evaporator. | 06-30-2011 |
20110167848 | AIR CONDITIONING APPARATUS - An air conditioning apparatus includes a compression mechanism, a heat source-side heat exchanger, an expansion mechanism, a usage-side heat exchanger, a blower, housings and a bypass circuit. The blower feeds an air flow to the heat source-side heat exchanger. The housings is configured to accommodate the heat source-side heat exchanger and the blower in a space above the bottom plate. The bypass circuit is disposed so as to pass below the blower and the heat source-side heat exchanger. The bypass circuit is configured to bypass a third refrigerant tube on a discharge side of the compression mechanism, and at least one of a first refrigerant tube and a second refrigerant tube. The first refrigerant tube extends from the usage-side heat exchanger to the expansion mechanism. The second refrigerant tube extends from the expansion mechanism to the heat source-side heat exchanger. | 07-14-2011 |
20110209488 | AIR CONDITIONER - An air conditioner includes a refrigerant circuit, a switching valve, an outdoor fan and a controller. The refrigerant circuit sequentially circulates refrigerant through a compressor, an indoor heat exchanger, a decompression mechanism and an outdoor heat exchanger during a heating operation. The switching valve is connected to the refrigerant circuit to switch a flow direction of the refrigerant discharged from the compressor. The controller executes a defrosting operation control in which the outdoor fan is deactivated and the switching valve directs refrigerant discharged from the compressor towards the outdoor heat exchanger during a defrosting operation. The controller further maintains the switching valve so refrigerant discharged from the compressor is directed towards the outdoor heat exchanger and executes a fan defrosting operation control in which the outdoor fan is rotated for a predetermined period of time after completion of the defrosting operation when a predetermined condition is satisfied. | 09-01-2011 |
20110283725 | HOT WATER SUPPLY APPARATUS ASSOCIATED WITH HEAT PUMP - A hot water supply apparatus associated with a heat pump is provided. The hot water supply apparatus performs a hot water supply operation using a high temperature refrigerant that has been discharged from a compressor, and simultaneously performs an indoor heating operation using a two-stage refrigerant cycle. This allows the apparatus to supply hot water while simultaneously providing heating/cooling to an indoor space. | 11-24-2011 |
20120006040 | AIR CONDITIONING APPARATUS - An air conditioning apparatus includes a refrigeration cycle, a magnetic field generator, a detector and a control part. The refrigeration cycle has a compression element, a refrigerant tube in thermal contact with a refrigerant flowing through the refrigerant tube and/or a heat-generating member in thermal contact with a refrigerant flowing through the refrigerant tube. The magnetic field generator generates a magnetic field to inductively heat a heating target portion. The detector detects a state quantity in a state quantity detection portion of the refrigeration cycle. The control part performs startup magnetic field generation control during startup of an air-warming operation in which maximum magnetic field output is initiated until the state quantity detected reaches a first target state quantity, and post-startup magnetic field generation control in which the magnetic field output is restricted after the startup magnetic field generation control has ended. | 01-12-2012 |
20120291467 | REFRIGERANT CYCLE DEVICE - A refrigerant cycle device for a vehicle includes a compressor which compresses and discharges refrigerant, a discharge capacity control portion which controls a discharge capacity of the compressor. The refrigerant cycle device further includes a noise determination portion which determines whether an audible noise other than a refrigerant passing noise is in a low noise state, and/or a load determination portion which determines whether an air-conditioning thermal load is in a high load state. The discharge capacity control portion performs a gradual activation control in which the discharge capacity of the compressor is set to be lower than that determined in a normal control, when the noise determination portion determines that the audible noise is in the low noise state, and/or when the load determination portion determines that the air-conditioning thermal load is in the high load state, at an activation time of the compressor. | 11-22-2012 |
20130081416 | REFRIGERATOR - Provided is a refrigerator, which includes a main body, a door, an evaporator, a defrosting heater, a defrosting sensor, and a control part. The main body includes a food storage space and an evaporation compartment. The door selectively closes the food storage space. The evaporator is disposed in the evaporation compartment. The defrosting heater is disposed at a side of the evaporator to remove frost from an outer surface of the evaporation compartment or the evaporator. The defrosting sensor is disposed at a side of the evaporation compartment or the evaporator to sense a frost formation amount. The control part receives a sensed value transmitted from the defrosting sensor, and controls an operation of the defrosting heater according to the sensed value. A sensing period of the defrosting sensor is varied according to a frost formation amount sensed by the defrosting sensor. | 04-04-2013 |
20130139533 | ALTERNATING TYPE HEAT PUMP - An alternating type heat pump has first to third rows of outdoor unit coils adapted to selectively perform the functions of an evaporator and a condenser in accordance with the outdoor conditions and the load variations, thereby improving the performance of the heat pump, and is capable of allowing the first to third rows of outdoor unit coils to be operated as a condenser in an alternating manner under the conditions where frost on the outdoor unit coils may be formed especially in winter seasons, thereby basically preventing the conditions on which the frost is formed. | 06-06-2013 |
20130291577 | Air Conditioning Device for Vehicle - A vehicle air conditioning apparatus is provided that can extend the mileage of a vehicle by reducing the power consumed by the operation of a compressor and a heater. When a required quantity of heating Q_req is acquired, the minimum power sharing ratio between quantity of heat release Q_hpof a water-refrigerant heat exchanger 22 and quantity of heat release Q_htrof a water heater 32 is calculated, which allows the power consumption W_total to be minimized, and a compressor 21 and the water heater 32 is operated based on the result of the calculation. | 11-07-2013 |
20130305759 | AIR CONDITIONER FOR VEHICLE - An air conditioner for a vehicle is provided with: a compressor that compresses a heat exchange medium; an external heat exchanger that receives the heat exchange medium and that exchanges heat with the outside of a vehicle compartment; and an evaporator that receives the heat exchange medium and exchanges heat with the inside of a vehicle compartment, and the air conditioner for a vehicle is able to perform: a defrosting cooling operation in which the heat exchange medium that has been compressed by the compressor is made to flow into the evaporator and absorb heat, and to then flow into the external heat exchanger and release heat; and a hot gas operation in which the heat exchange medium that has been compressed by the compressor is made to flow into the external heat exchanger and release heat without being made to absorb heat in the evaporator, and, by switching between performing the defrosting cooling operation and performing the hot gas operation, the air conditioner for a vehicle performs a defrosting operation in which the external heat exchanger is defrosted. | 11-21-2013 |
20140033750 | AIR-CONDITIONING APPARATUS INCLUDING UNIT FOR INCREASING HEATING CAPACITY - An air-conditioning apparatus including a check valve in a passage between a first flow switching device and a suction side of a compressor, an expansion valve midway of a liquid extension piping, and an additional unit having a first bypass and a second bypass that are branched off from a passage between an indoor unit and the liquid expansion valve, and are connected to a passage between the check valve and the suction side of the compressor. The first bypass has, midway thereof, a first bypass expansion valve capable of controlling a throughput of refrigerant and an auxiliary heat exchanger that has a heat source different from the refrigerant, the auxiliary heat exchanger functioning as an evaporator heating the refrigerant flowing in the first bypass. The second bypass has, midway thereof, a second bypass expansion valve capable of controlling a throughput of refrigerant. | 02-06-2014 |
20140216083 | AIR-CONDITIONING APPARATUS - A refrigerant circuit is configured by connecting, by pipes, a compressor that compresses a heat-source-side refrigerant, a first refrigerant flow switching device, a heat-source-side heat exchanger, an expansion device, and one or more intermediate heat exchangers that exchange heat between a heat-source-side refrigerant and a heat medium that is different from the heat-source-side refrigerant. A controller performs control of pumps to drive the pumps at a specific pump capacity or higher to circulate the heat medium at a time when a heat recovery defrosting operation for causing the heat-source-side refrigerant that has been heated by the heat medium in the intermediate heat exchangers to flow into the heat-source-side heat exchanger for defrosting purposes. | 08-07-2014 |
20140245766 | AIR-CONDITIONING APPARATUS - A first flow switching device causes part of a refrigerant discharged from an injection compressor to flow through a first bypass pipe and be supplied to an outdoor heat exchanger targeting for defrosting. A second flow switching device causes part of the refrigerant supplied to the outdoor heat exchanger targeting for defrosting to enter a second bypass pipe. | 09-04-2014 |
20140250930 | DEHUMIDIFYING APPARATUS - A first heat exchanger, a desiccant block, and a second heat exchanger are arranged in series. In a dehumidification operation, a first operation mode in which the first heat exchanger acts as a condenser or a radiator and the second heat exchanger acts as an evaporator and a second operation mode in which the first heat exchanger acts as an evaporator and the second heat exchanger acts as a condenser or a radiator are alternately repeated. | 09-11-2014 |
20140298838 | AIR-CONDITIONING APPARATUS FOR VEHICLE - An air conditioning apparatus for a vehicle includes a refrigerant heater | 10-09-2014 |
20140311172 | OUTDOOR UNIT AND AIR-CONDITIONING APPARATUS - An outdoor unit includes a compressor compressing a sucked refrigerant and discharging compress, an outdoor heat exchanger exchanging heat between outdoor air and the refrigerant, an accumulator storing a liquefied refrigerant at a suction side of the compressor, a solenoid valve for storing the refrigerant in the outdoor heat exchanger, and a controller performing control so as to feed the refrigerant stored within the outdoor heat exchanger during a defrosting operation, to the accumulator on the basis of an amount of refrigerant within the accumulator when operation is switched to a heating operation from the defrosting operation. | 10-23-2014 |
20140338381 | REFRIGERATING AND AIR-CONDITIONING APPARATUS - A refrigerating and air-conditioning apparatus performs, even during a heating operation under air conditions leading to formation of frost, a defrosting operation while simultaneously continuing the heating operation and improves comfort through heating by securing an appropriate amount of ventilation. A plurality of refrigeration cycles independently performs a heating operation and a defrosting operation. By controlling a ventilation damper of an indoor unit that is to perform a defrosting operation to increase the amount of ventilation, a prior ventilation operation for securing the time-averaged required amount of ventilation including the period in which the defrosting operation is being performed is performed before the defrosting operation, and after the prior ventilation is terminated, the defrosting operation is started. | 11-20-2014 |
20150121925 | REFRIGERATOR - Provided is a refrigerator. The refrigerator may include a power supply unit configured to power the refrigerator using commercial power, a battery coupled to the power supply unit and configured to supply auxiliary power to the refrigerator, a power detection unit coupled to the power supply unit and the battery and configured to detect whether power is being supplied from the power supply unit, a driving unit to provide cold air, and a controller configured to control an operational mode of the driving unit based on the detection at the power detection unit. When the power supply unit is supplying power, the driving unit may be controlled to operate in a normal operation mode, and when the power supply unit is not supplying power, the driving unit may be controlled to operate in a power failure operation mode and to control the power to be supplied from the battery. | 05-07-2015 |
20150135749 | FLOW RATE ADJUSTMENT VALVE FOR REFRIGERATION CYCLE - A flow rate regulation valve is used for a refrigeration cycle device for air conditioning. The flow rate regulation valve is constituted by: an inlet flow rate control valve connected to the inlet side of an inside evaporator and functioning in the refrigeration cycle device as an expansion valve for depressurizing and expanding a refrigerant flowing into the inside evaporator; and an outlet flow rate adjustment valve connected to the outlet side of the inside evaporator and functioning as an evaporation pressure adjustment valve for adjusting evaporation pressure in the inside evaporator to a predetermined target pressure at which frost is not formed. The flow rate regulation valve is characterized in that, when the opening of one of the inlet flow rate control valve and the outlet flow rate adjustment valve increases, the flow rate regulation valve displaces so that the opening of the other decreases. | 05-21-2015 |
20160076805 | REFRIGERATOR - Provided is a refrigerator. The refrigerator may include a power supply unit configured to power the refrigerator using commercial power, a battery coupled to the power supply unit and configured to supply auxiliary power to the refrigerator, a power detection unit coupled to the power supply unit and the battery and configured to detect whether power is being supplied from the power supply unit, a driving unit to provide cold air, and a controller configured to control an operational mode of the driving unit based on the detection at the power detection unit. When the power supply unit is supplying power, the driving unit may be controlled to operate in a normal operation mode, and when the power supply unit is not supplying power, the driving unit may be controlled to operate in a power failure operation mode and to control the power to be supplied from the battery. | 03-17-2016 |
20160082810 | VEHICLE AIR CONDITIONER - There is disclosed a vehicle air conditioner capable of preventing or inhibiting deterioration of a vehicle interior heating capability which is caused by frost formation to an outdoor heat exchanger. The vehicle air conditioner includes a compressor | 03-24-2016 |
20160084555 | VEHICULAR AIR-CONDITIONING DEVICE - There is disclosed an air-conditioning device of a so-called heat pump system which acquires comfortable heating of a vehicle interior by preventing or inhibiting frost formation to an outdoor heat exchanger. A controller calculates a maximum heating capability predicted value without frosting QmaxNfst as a target value of a maximum heating capability which can be generated by a radiator | 03-24-2016 |
20190145693 | CONTROLLED DEFROST FOR REFRIGERATION SYSTEMS | 05-16-2019 |
20220136750 | OUTDOOR UNIT FOR A HEAT PUMP - An outdoor unit for a heat pump includes a refrigerant circuit, the outdoor unit including a compressor, a discharge pipe of the refrigerant circuit connected to a discharge side of the compressor, a bottom plate, the bottom plate having a base and an outer flange protruding upward from an outer edge of the base, a heat source heat exchanger supported on the bottom plate, a liquid refrigerant pipe of the refrigerant circuit connected to the heat source heat exchanger, and a defrosting bypass pipe connected at one end to the discharge pipe and at the opposite end to the liquid refrigerant pipe, the defrosting bypass pipe being arranged between an inner side of the flange and an outer side of the heat source heat exchanger. | 05-05-2022 |
062152000 | Limited area, e.g., preferred zone | 2 |
20080282714 | REFRIGERATOR DEFROSTING AND CHILLING COMPARTMENT - A defrosting and chilling compartment that can be incorporated into the fresh food compartment of a refrigerator includes separate and independent pathways for selectively conducting warming or cooling air, respectively, to a holding section in the compartment where an item to be defrosted or chilled is located. Certain of the pathways are used to conduct warming air and certain other pathways are used to conduct cooling air. A heating device is associated with the pathways that conduct warming air, and the pathways that conduct cooling air are associated with a source of cooling air. Separate air-moving devices, such as fans for example, can be provided for the separate pathways. The pathways can include a closure device for selectively and variably opening and closing the pathways. | 11-20-2008 |
20120067072 | METHODS, SYSTEMS, AND DEVICES FOR CONTROLLING ANTI-SWEAT HEATERS - The various embodiments disclosed herein relate to anti-sweat heater systems for refrigeration units. More specifically, certain embodiments relate to anti-sweat heater control systems having one or more controllers that operate anti-sweat heaters independently of each other. | 03-22-2012 |
062154000 | By energy input actuated means | 2 |
20100024452 | MICRO-CHANNEL EVAPORATOR WITH FROST DETECTION AND CONTROL - A refrigerant vapor compression system includes an evaporator having a plurality of longitudinally extending, flattened heat exchange tubes disposed in parallel, spaced relationship. Each of the heat exchange tubes has a flattened cross-section and defining a plurality of discrete, longitudinally extending refrigerant flow passages. One or more frost detection sensor(s) is/are installed in operative association with the evaporator for detecting a presence of frost/ice formation on at one of the flattened heat exchange tubes and associated heat transfer fins. A defrost system is provided and operatively associated with the evaporator heat exchanger A controller, operatively coupled to the frost detection sensor(s) and to the defrost system, selectively activates the defrost system to initiate a defrost cycle of the evaporator in response to the signal indicative of the presence of frost formation on the flattened heat exchange tubes and heat transfer fins. | 02-04-2010 |
20160201960 | VEHICLE AIR CONDITIONER | 07-14-2016 |
062155000 | Including time or program actuator | 25 |
20090145144 | CONTROLLER AND CONTROL METHOD FOR REFRIGERATING SYSTEM - In a controller for a refrigerating system including refrigerating machines and showcases, a showcase that is about to execute a defrost operation is detected on the basis of a defrost operation indicating information. When the controller receives a notification indicating start of the defrost operation from the showcase concerned or on the basis of a comparison result between a pre-stored defrost-operation start time and the present time, at least one of the refrigerating machines is instructed to reduce the output power thereof. When the showcase finishes the defrost operation, the at least one of the refrigerating machines is instructed to increase the output power thereof so that the output power of the refrigerating machine is set to stationary output power. | 06-11-2009 |
20090217684 | Equipment Control System, Control Device and Control Program - An equipment control system for equipment such as a refrigeration device, its control device, and its control program are provided in which present-round defrosting operation start time can be changed appropriately. The integrated controller | 09-03-2009 |
20090266093 | Refrigerating air conditioning system - A refrigerating air conditioning system is provided with a refrigerant circuit which includes a compressor | 10-29-2009 |
20090308089 | Control System, Integrated Control Apparatus, And Control Program - An object of the present invention is to provide a control system, an integrated control apparatus, and a control program that are capable of well maintaining freshness and quality of food articles, by reducing time for performing a recovery operation following a frost removing operation of cooling devices. In response to a start of the frost removing operation of a first showcase, an integrated control apparatus provides a second device controller (device control unit) with a “lower limit cooling instruction (increase instruction)” to increase the refrigerant supplied to a second showcase to an amount larger than that before the frost removing operation starts. In response to the “lower limit cooling instruction (increase instruction),” the second device controller (device control unit) increases the amount of the refrigerant supplied to the second showcase. | 12-17-2009 |
20100089081 | VENDING MACHINE AND METHOD FOR DEFROSTING - A method includes sensing an exposure of a refrigerated compartment of a vending machine to ambient air and, in response, sensing an initial temperature of the refrigerated compartment. The method also includes, responsive to sensing the exposure to ambient air, selecting a procedure from a plurality of procedures according to the sensed initial temperature, and controlling a refrigeration system of the vending machine using the selected procedure during an initial period. The method may include sensing a current temperature of the vending machine and, once the refrigerated compartment reaches a second predetermined temperature, controlling the refrigeration system according to the sensed current temperature, monitoring an operational characteristic of a compressor of the refrigeration system, and performing a defrost procedure according to the monitored operational characteristic. | 04-15-2010 |
20110016896 | Air conditioner for vehicle with heat pump cycle - An air conditioner for a vehicle includes a vapor compression refrigeration cycle switchable between a heat pump cycle and a cooler cycle, a heat core configured to heat air to be blown into a vehicle compartment by using coolant of an engine of the vehicle as a heat source, and a controller configured to control operation of the vapor compression refrigeration cycle. The controller controls the vapor compression refrigeration cycle to be operated as the cooler cycle so as to perform a defrosting control of the outdoor heat exchanger, and outputs an operation request signal to the engine, when the controller determines that the outdoor heat exchanger is frosted. | 01-27-2011 |
20110185755 | Cooling apparatus and frost detecting method thereof - A cooling apparatus including a frost sensor to sense frost, a multiplexer having a first input terminal, to which the frost sensor is connected, and a second input terminal as a non-connected input terminal, a signal processor to subtract a signal input through the second input terminal from a signal input through the first input terminal, and to output a signal obtained by the subtraction, and a controller to detect an amount of frost sensed by the frost sensor, based on the output signal from the signal processor. It is possible to easily and accurately determine noise contained in a signal received from the frost sensor by determining, as noise, the signal received from the input terminal, to which the frost sensor is not connected, and subtracting the noise from the signal received from each input terminal, to which the frost sensor is connected. | 08-04-2011 |
20110209489 | Heat pump defrost control - An electronic defrost system consisting of a circuit board designed to implement defrost cycle of an air source heat pump outdoor coil during the off-cycle period. off-cycle is when the house thermostat is satisfied, heat pump is timed off for two minutes and then reactivated in regular defrost cycle if defrost sensor is calling for defrost. (Temp/off cycle). When sensor opens, heat pump will shut off for two minutes to allow pressure equalization. | 09-01-2011 |
20120031127 | Defrost Fan Control Device - A defrost fan control device for a refrigerator is provided. The device comprises a container, a heat exchanger, a chamber, a suction pump, a condensate spraying device, an evaporation coil, and a blower. The suction pump is for sucking up the condensate from the container. The condensate spraying device is for spraying the condensate sucked up by the suction pump within the chamber. The evaporation coil is disposed around the condensate spraying device such that the condensate from the suction pump lands on an inner surface of the evaporation coil and evaporates the condensate. The blower is for inducing air flow within the chamber, whereby the evaporated condensate is exhausted from the chamber. | 02-09-2012 |
20120266621 | CONTAINER REFRIGERATION SYSTEM - A container refrigeration system includes a refrigerant circuit configured to perform a refrigeration cycle and including a main circuit in which a compressor, a condenser, an expansion valve, and an evaporator are connected together in this order, and a hot gas bypass circuit in which compressed refrigerant of the compressor is supplied to the evaporator by bypassing the condenser and the expansion valve; and a compressor control section configured to, in a defrosting operation in which the compressed refrigerant of the compressor returns to the compressor through the hot gas bypass circuit and the evaporator and the evaporator is defrosted, control an operating speed of the compressor such that a pressure of the compressed refrigerant of the compressor reaches a target value. | 10-25-2012 |
20130031921 | REFRIGERATING AND AIR-CONDITIONING APPARATUS - A refrigeration cycle that is formed by connecting a compressor, a condenser, expansion means, and an evaporator and that performs cooling operation; an evaporator heating device that heats the evaporator; a drain pan that receives drain-water from the evaporator and drains the drain-water; a drain-pan heating device that heats the drain pan; frost detecting means including a light-emitting element that emits light to the evaporator and a light-receiving element that receives reflected light from the evaporator and outputs a voltage according to the reflected light; and a control device that controls on-off operation of the evaporator heating device and the drain-pan heating device. The control device determines a frosting condition on the evaporator from an output of the frost detecting means and individually controls the evaporator heating device and the drain-pan heating device in accordance with the determination result. | 02-07-2013 |
20130055742 | Equipment Control System, Control Device and Control Program - An equipment control system for equipment such as a refrigeration device, its control device, and its control program are provided in which defrosting operation start time can be changed appropriately. The integrated controller controls a defrosting operation to remove frost adhered to the equipment, in which the defrosting operation is started at a fixed or varying time interval. The integrated controller stores past data based on required time for past defrosting operations for different environmental conditions. The integrated controller includes an environmental condition acquisition unit for obtaining environmental conditions; a database control unit for obtaining required time for a defrosting operation based on the past record data corresponding to the present environmental conditions from the stored past data; and a start time changing unit for changing start time of the present-round defrosting operation based on the obtained required time. | 03-07-2013 |
20130067943 | System and Method for Oil Return in an HVAC System - A system and a method are provided for returning oil in a heating, ventilation, and air conditioning (HVAC) system by determining when an ambient zone temperature is equal to or less than a temperature limit and reversing a direction of refrigerant flow of the HVAC system based on the length of time. Also, a system and a method are provided for monitoring the length of operation in a first and a second heating mode and for reversing a direction of refrigerant flow based on the length of time operation occurs in the first and second heating modes. A system and a method having a first compressor, a first heating mode, a second heating mode, a defrost mode, and a controller is disclosed. The controller selectively controls initiation of the defrost mode in response to an HVAC system operating in a heating mode of operation for a predetermined amount of time. | 03-21-2013 |
20140260384 | APPLIANCE USING HEATED GLASS PANELS - Appliances are provided with one or more heated glass panels that provide a uniform and controllable source of heat. The heated glass panels can generate heat for any desired purpose, such as drying articles and removing frost buildup in a freezer. | 09-18-2014 |
20140345309 | REFRIGERATING AND AIR-CONDITIONING APPARATUS - A refrigerating and air-conditioning apparatus performs, even during a heating operation under air conditions leading to formation of frost, a defrosting operation while simultaneously continuing a heating operation and that improves comfort through heating by ensuring an appropriate amount of ventilation. A plurality of refrigeration cycles that are capable of independently performing a heating operation and a defrosting operation, are provided. A ventilation damper of an indoor unit in which a refrigeration cycle that performs a defrosting operation is installed is closed during a defrosting operation, and a ventilation damper of an indoor unit in which a refrigeration cycle that performs a heating operation is installed is controlled to achieve a required amount of ventilation corresponding to the indoor ventilation state. | 11-27-2014 |
20150047380 | REFRIGERATING MACHINE HAVING TUBE-COOLED EVAPORATOR & AIR-COOLED EVAPORATOR - A refrigerating machine having tube-cooled evaporator & air-cooled evaporator includes a refrigerating device ( | 02-19-2015 |
20150059375 | AIR CONDITIONER FOR VEHICLE WITH HEAT PUMP CYCLE - An air conditioner for a vehicle includes a vapor compression refrigeration cycle switchable between a heat pump cycle and a cooler cycle, a heat core configured to heat air to be blown into a vehicle compartment by using coolant of an engine of the vehicle as a heat source, and a controller configured to control operation of the vapor compression refrigeration cycle. The controller controls the vapor compression refrigeration cycle to be operated as the cooler cycle so as to perform a defrosting control of the outdoor heat exchanger, and outputs an operation request signal to the engine, when the controller determines that the outdoor heat exchanger is frosted. | 03-05-2015 |
20150362247 | DEFROST APPLIANCE - A defrost appliance is provided that over comes the limitations of other methods of defrosting by use of an insulated closed inner shell, providing refrigeration and ultra violet light to control the proliferation of bacteria and circulating liquid via a pump raining it down on sealed frozen food to expedite thawing of frozen food in a controlled environment a quick, efficient, safe, easy to use means for defrosting frozen food. | 12-17-2015 |
20160161165 | AIR-CONDITIONING SYSTEM - A low-cost and highly-efficient air-conditioning system including an AHU using refrigerant of a heat pump cycle as a heat source, and capable of reducing an on/off cycle operation of compressors at a time of a low load, the system including: a plurality of outdoor units; an air handling unit; a plurality of independent heat pump cycles formed by connecting the plurality of outdoor units and the air handling unit by refrigerant pipes, each of the plurality of independent heat pump cycles including a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger; and a number control unit controlling, to satisfy a capacity demand corresponding to an air-conditioning load, based on a particular frequency range associated with the compressor, in which a certain compressor efficiency or more is obtained, a number of the compressors in operation and operating frequencies of the respective compressors in operation. | 06-09-2016 |
20160169571 | AIR CONDITIONER | 06-16-2016 |
20160178259 | AIR CONDITIONER | 06-23-2016 |
20160178261 | AIR CONDITIONER | 06-23-2016 |
20160193896 | VEHICLE AIR CONDITIONER | 07-07-2016 |
20160201959 | VEHICLE AIR CONDITIONER | 07-14-2016 |
20170234589 | REFRIGERATION CYCLE APPARATUS AND AIR-CONDITIONING APPARATUS | 08-17-2017 |
062156000 | By temperature | 19 |
20080271470 | Memory Wire Rotary Actuator - A timer is provided. The timer includes a rotatable electrically non-conducting ratchet gear, an electrically conducting pawl mechanism, and an electronic drive circuit. The ratchet gear has a plurality of teeth. The electrically conducting pawl mechanism includes a pawl configured to engage one of the plurality of teeth on the ratchet gear. The an electronic drive circuit is electrically coupled to the pawl mechanism. The electronic drive circuit passes a current through the pawl mechanism such that the pawl advances the ratchet gear by one tooth pitch. | 11-06-2008 |
20090049849 | CONTROL METHOD FOR REFRIGERATOR - A control method for a refrigerator is provided. In the method, operating conditions of a compressor are determined through a defrost sensor mounted to an evaporator to reduce power consumption. Because the operating conditions of the compressor are determined according to the temperature of the evaporator, cooling efficiency of the refrigerator can be improved, and power consumption can be reduced. | 02-26-2009 |
20110100041 | HEAT PUMP CONTROL SYSTEM USING PASSIVE DEFROST - A heat pump system includes a controller and a closed system that includes a condensing heat exchanger coil, an evaporating heat exchanger coil, a refrigerant and a compressor. The compressor is configured to compress the refrigerant, thereby causing the refrigerant to have a greater pressure in the condensing heat exchanger coil than in the evaporating heat exchanger coil. The controller is configured to perform a passive defrost of the evaporating heat exchanger coil. The passive defrost includes disabling the compressor and providing a bypass path between the condensing and evaporating heat exchanger coils that bypasses the compressor. The bypass path allows the refrigerant to flow from the condensing heat exchanger coil to the evaporating heat exchanger coil while the compressor is disabled. | 05-05-2011 |
20110192180 | Frost protection system for condensate drain pipe - A frost protection system is described for a condensate drain pipe for a boiler, air-conditioning unit etc to protect an outdoors run of the pipe. The system comprises an outdoors temperature sensor, a heater, and a controller for activating the heater in dependence upon the temperature sensed by the sensor. The heater is in the form of a flexible line (for example an electrical cable with a resistive filament). The heater (or a connection for it) passes through a fitting in the pipe indoors, and the heater extends along the inside of the outdoors run of the pipe. In cold weather, the controller activates the heater to produce heat inside the drain pipe and thus reduce the risk of the condensate freezing. | 08-11-2011 |
20110314851 | AIR CONDITIONER - An air conditioner includes a heat generating member, an electromagnetic induction heating unit, an air conditioning target space temperature detecting unit, an outdoor air temperature detecting unit, and a control unit. The heat generating member thermally contacts a refrigerant piping and/or refrigerant that flows through the refrigerant piping. The electromagnetic induction heating unit includes a magnetic field generating part that generating part generates a magnetic field in order to heat the heat generating member by induction heating. The control unit, when the refrigeration cycle is performing heating operation or defrosting operation, inhibits the generation of the magnetic field by the magnetic field generating part when the temperature of the space to be air conditioned and the outside air temperature do not satisfy a first prescribed condition or when a difference between a target set temperature and the temperature of the space does not satisfy a second prescribed condition. | 12-29-2011 |
20120031128 | Heating And Cooling Circuit With Self Heat-Up Function For Air-Conditioning System Of Electric Vehicle - The presently disclosed invention uses a heating and cooling circuit to produce both heating and cooling effects through one single air-conditioning unit. It operates in one refrigeration cycle to provide both heating and cooling effects to control the temperature in an electric vehicle's passenger compartment. It also includes a self heat-up component to prevent the outside heat exchanger from getting frozen when the outside temperature drops below 32° F. | 02-09-2012 |
20120247136 | OUTDOOR UNIT OF AIR CONDITIONER AND METHOD FOR CONTROLLING THE SAME - An outdoor unit for an air conditioning system includes a tank to store defrosting liquid, a nozzle to apply defrosting liquid from the tank to a heat exchanger, a valve to control flow of the defrosting liquid between the tank and nozzle, and a controller to control the valve based on a temperature of the heat exchanger and a number of times the valve has been set to an open state during a heating mode of the air conditioning system. | 10-04-2012 |
20120304675 | AIR-CONDITIONING APPARATUS - To obtain an air-conditioning apparatus that is capable of performing an effective defrosting operation, as well as saving energy, the air-conditioning apparatus has a heating operation mode that heats a heat medium in at least one of the heat exchangers related to heat medium, a heat recovery defrosting operation mode that melts frost attached to a heat source side heat exchanger—during the heating operation mode by operating at least one of the pumps and by making a heat source side refrigerant receive heat from the heat medium that is flowing in the at least one of the heat exchangers related to heat medium, and a bypass defrosting operation mode that melts frost attached to the heat source side heat exchanger during the heating operation mode by passing a portion or all of the heat source side refrigerant through a bypass piping. | 12-06-2012 |
20120312040 | AIR CONDITIONER IN ELECTRIC VEHICLE - The present invention relates to an air conditioner in an electric vehicle, and more particularly to an air conditioner in an electric vehicle, which can make continuous heating operation even in defrosting operation, can enhance heating efficiency and performance even in the defrosting operation, and can recover heat discharged from various components of the electric vehicle even in the defrosting operation for preventing liquid refrigerant from being introduced to a compressor. | 12-13-2012 |
20130055743 | AIR CONDITIONER FOR VEHICLE - An air-conditioner for a vehicle includes a vapor-compression refrigeration cycle, a determination unit and a controller. The refrigeration cycle includes a compressor, an inside condenser, an outside heat exchanger, and an inside evaporator. The refrigeration cycle is capable of operating an outside-air heat-absorption heating operation in which refrigerant absorbs heat at the outside heat exchanger and radiates heat at the inside condenser, and an inside-air heat-absorption heating operation in which refrigerant absorbs heat at the inside evaporator and radiates heat at the inside condenser. The determination unit determines whether or not the outside heat exchanger freezes. The controller changes over the outside-air heat-absorption heating operation to the inside-air heat-absorption heating operation when the determination unit determines that the outside heat exchanger freezes. According to the air-conditioner, a heating operation can be maintained without increasing drive power for the compressor even when the outside heat exchanger freezes. | 03-07-2013 |
20130091882 | AIR CONDITIONER - There is disclosed an air conditioner including a compressor to compress refrigerant, an indoor heat exchanger to cool or heat a room, using the refrigerant, an outdoor heat exchanger to heat-exchange the refrigerant with outdoor air, the outdoor heat exchanger comprising a front heat exchange member and a rear heat exchange member, and a defrosting module to adjust an opening degree of a passage of the refrigerant drawn into the front heat exchange member and the rear heat exchange member, wherein the defrosting module includes a first expansion valve to adjust an opening of a passage of the refrigerant introduced into the front heat exchange member and a defrosting unit to adjust an opening degree of a passage of the refrigerant between the front heat exchange member and the rear heat exchange member. | 04-18-2013 |
20130167570 | Conduit for using only at one end of, and for mildly defrosting, an evaporator without causing excessive heat to affect the evaporator or occupants in proximity to the evaporator - A conduit used only at one end of, and mildly defrosting, an evaporator without causing excessive heat to affect the evaporator in proximity to the evaporator. A tube includes at least one central passageway, at least one peripheral passageway, and at least one intermediate passageway. A refrigerant flows through the at least one peripheral passageway. A hot refrigerant gas flows through the at least one central passageway, and blends with the refrigerant flowing through the tube so as to form a defrosting blend. The defrosting blend defrosts along the full length of the tube, which occurs very rapidly due to contact of the hot refrigerant gas on the way to the end of the tube and then back through the at least one intermediate passageway of the tube as the blend. | 07-04-2013 |
20130192284 | AIR CONDITIONING APPARATUS - When the temperatures of outdoor heat exchangers | 08-01-2013 |
20140041404 | AIR CONDITIONER FOR VEHICLE - An air conditioner for a vehicle includes: a compressor that compresses a heat exchange medium; an internal heat exchanger that performs heat exchange between the heat exchange medium expelled from the compressor and air for air conditioning introduced inside a vehicle compartment; and an external heat exchanger that performs heat exchange between the heat exchange medium expelled from the internal heat exchanger and external air, wherein the air conditioner for a vehicle calculates a temperature difference between an external air temperature and a discharge port temperature of the external heat exchanger, calculates an average value of the temperature difference, and performs a defrosting operation which melts frost adhered to the external heat exchanger when an amount of change of the average value is equal to or greater than a first predetermined value. | 02-13-2014 |
20140230473 | AIR-CONDITIONING APPARATUS - In an air-conditioning apparatus, a heat source side heat exchanger, intermediate heat exchangers, and use side heat exchangers are separately formed and adapted to be disposed at separate locations, respectively. There is provided a defrosting operation function to melt frost attached around the heat source side heat exchanger, and a heating function during defrosting operation that drives a pump to circulate a heat medium and supply heating energy to the use side heat exchangers in need of heating to perform heating operation. The defrosting operation function can be executed by switching a four-way valve to cooling side to introduce a high-temperature high-pressure refrigerant flowed out of the compressor into the heat source side heat exchanger. | 08-21-2014 |
20150040592 | OUTDOOR UNIT OF AIR CONDITIONER AND AIR CONDITIONER - An outdoor unit of an air conditioner includes: an outdoor fan; an outdoor air temperature detector; and a controller, wherein the controller performs: a fan defrost operation to circulate the refrigerant in the same order as in the case of a cooling operation and rotate the outdoor fan when the outdoor air temperature is within a predetermined temperature range, a fan defrost operation over a period of a first fan defrost operation time when the outdoor air temperature is lower than a first predetermined temperature, and a fan defrost operation over a period of a second fan defrost operation time that is longer than the first fan defrost operation time when the outdoor air temperature is equal to or higher than a second predetermined temperature that is higher than the first predetermined temperature. | 02-12-2015 |
20150040593 | AIR CONDITIONER - The air conditioner | 02-12-2015 |
20160178258 | DEFROST SYSTEM FOR REFRIGERATION APPARATUS, AND COOLING UNIT | 06-23-2016 |
20170234590 | REFRIGERATION CYCLE APPARATUS AND AIR-CONDITIONING APPARATUS | 08-17-2017 |