Patent application number | Description | Published |
20110314848 | COMBINED AIR-CONDITIONING AND HOT-WATER SUPPLY SYSTEM - A configuration provided with a heat source unit, an indoor unit, a circuit for a hot-water supply heat source provided with a refrigerant—refrigerant heat exchanger and throttle means for the hot-water supply heat source, and a branch unit that distributes a refrigerant flowing through the indoor unit and the circuit for hot-water supply heat source and also provided with a refrigerating cycle for air conditioning in which the indoor unit and the circuit for hot-water supply heat source are connected in parallel and connected to the heat source unit by at least two connection pipelines via the branch unit and a refrigerating cycle for hot-water supply in which a compressor for hot-water supply, a heat-medium—refrigerant heat exchanger, throttle means for hot-water supply, and the refrigerant—refrigerant heat exchanger are connected in series, in which the refrigerating cycle for air conditioning and the refrigerating cycle for hot-water supply are connected so as to exchange heat between the refrigerant for air conditioning and the refrigerant for hot-water supply in the refrigerant—refrigerant heat exchanger. | 12-29-2011 |
20130014525 | SWITCHING DEVICE AND AIR-CONDITIONING APPARATUSAANM Koge; HirofumiAACI TokyoAACO JPAAGP Koge; Hirofumi Tokyo JPAANM Kawagoe; TomokazuAACI TokyoAACO JPAAGP Kawagoe; Tomokazu Tokyo JPAANM Azuma; KojiAACI TokyoAACO JPAAGP Azuma; Koji Tokyo JP - A switching device or the like efficiently performs operations such as the cutting off of a refrigerant and is easy to maintain, design, and manufacture at low cost even if the switching device is included in, for example, an air-conditioning apparatus including a plurality of indoor units. A plurality of shut-off valves for individually stopping the flow of a refrigerant are provided in a plurality of pipes for making a refrigerant circulate between a heat source unit and a plurality of indoor units. The shut-off valves are integrated into pairs. A number of pairs of the shut-off valves corresponding to the number of indoor units are grouped together. | 01-17-2013 |
20130061622 | REFRIGERATING AND AIR-CONDITIONING APPARATUS - A refrigerating and air-conditioning apparatus is provided, with which a cold-storage/refrigeration load and air-conditioning loads such as a cooling load and a heating load can be simultaneously processed and a stable heat source can be supplied throughout the year. In the refrigerating and air-conditioning apparatus, heating energy or cooling energy stored in the primary-side refrigerant is usable as an air-conditioning load through the indoor heat exchanger while cooling energy stored in the primary-side refrigerant is transferred to the secondary-side refrigerant circulated in the cold-storage/refrigeration refrigeration cycle through the first refrigerant-refrigerant heat exchanger so as to be usable as a cold-storage/refrigeration load. | 03-14-2013 |
20130213072 | COMBINED AIR-CONDITIONING AND HOT-WATER SUPPLY SYSTEM - A combined air-conditioning and hot-water supply system that, if a temperature that is set in a hot-water supply unit is higher than a temperature of refrigerant discharged from a compressor when the combined air-conditioning and hot-water supply system is in a heating operation cycle state, increases a target condensing temperature of an outdoor unit above the target condensing temperature that has been set, and controls an opening degree of an indoor expansion device to be less than the opening degree that has been set, such that a heating load of an indoor unit is maintained constant. | 08-22-2013 |
20130219945 | COMBINED HOT WATER SUPPLY AND AIR-CONDITIONING DEVICE - A combined hot water supply and air-conditioning device supplies heat source even in a case where the outside air temperature is high such as in summertime. | 08-29-2013 |
20140297057 | HEAT PUMP SYSTEM, CONTROL DEVICE, TEMPERATURE ADJUSTMENT METHOD, AND PROGRAM - The refrigerant discharged from a compressor is distributed based on the priorities set by the user in advance and the remaining refrigerant is further distributed based on the priorities. Thus, setting the priorities for indoor units according, for example, to the usage of work spaces and the like in an office building, the user can operate a heat pump system efficiently in accordance with the intended use. Furthermore, the remaining capacity of the outdoor unit is distribute to the remaining indoor units according to their priorities so that the indoor units are operated efficiently within the range of the cooling capacity of the outdoor unit. | 10-02-2014 |
20150040597 | AIR-CONDITIONING APPARATUS - An outdoor heat exchanger includes tube-outside heat transfer coefficient adjusting means configured to adjust a heat transfer coefficient αo of the outside of a heat transfer tube through which a refrigerant flows, tube-inside heat transfer coefficient adjusting means configured to adjust a heat transfer coefficient αi of the inside of the heat transfer tube through which the refrigerant flows, and heat transfer area adjusting means configured to adjust a heat transfer area A where the refrigerant exchanges heat with a heat medium. A controller controls the heat transfer coefficient αo of the outside of the heat transfer tube, the heat transfer coefficient αi of the inside thereof, and the heat transfer area A to control a heat exchange amount of the outdoor heat exchanger. | 02-12-2015 |
20150176879 | AIR-CONDITIONING APPARATUS - In a heating main operation mode in which a load to be processed by the heating operation is dominant during cooling and heating mixed operation, an air-conditioning apparatus closes an opening and closing valve, and adjust the opening degree of an expansion device in accordance with the evaporating temperature of a load-side unit requesting cooling. | 06-25-2015 |
20150211776 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus includes a heat-source-unit-side heat exchanger, a plurality of use-side heat exchangers, and a relay unit provided between the heat-source-unit-side heat exchanger and the plurality of use-side heat exchangers. The relay unit is configured to switch part of the plurality of use-side heat exchangers to a cooling operation side to switch part of the plurality of use-side heat exchangers to a heating operation side, and simultaneously performs a cooling and heating simultaneous operation by switching each of the plurality of use-side heat exchangers to the cooling operation side or the heating operation side in accordance with a control instruction. | 07-30-2015 |
20150219373 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus that includes a compressor, a heat-source-side heat exchanger, a plurality of use-side heat exchangers, and a relay unit which switches some of the plurality of use-side heat exchangers to the cooling operation side and which switches some of the plurality of use-side heat exchangers to the heating operation side and that performs a cooling and heating simultaneous operation by switching each of the plurality of use-side heat exchangers to the cooling operation side or the heating operation side in accordance with a control instruction, includes a second flow rate control device which adjusts the flow rate of the refrigerant flowing into the compressor, a third flow rate control device which is connected in parallel to the second flow rate control device and which adjusts the flow rate of the refrigerant flowing into the heat-source-side heat exchanger, and a controller which adjusts the second flow rate control device and the third flow rate control device. The controller adjusts the opening degree of the second flow rate control device and the opening degree of the third flow rate control device in accordance with the outside air temperature. | 08-06-2015 |
20150316284 | AIR-CONDITIONING APPARATUS - Provided is an air-conditioning apparatus capable of performing a cooling and heating mixed operation, including: a heat source unit including a compressor; a plurality of indoor units; a relay unit; a first relay unit-side bypass pipe configured to cause a part of refrigerant, which is discharged from the compressor and flows into the relay unit, to flow between a heat source unit-side heat exchanger and an indoor unit-side heat exchanger; a second relay unit-side flow rate control device provided to the first relay unit-side bypass pipe; and a controller configured to control an opening degree of the second relay unit-side flow rate control device so that, in an operation in which the heat source unit-side heat exchanger functions as an evaporator, a discharge temperature of a discharge refrigerant discharged from the compressor is equal to or lower than a heat-resistant temperature of the compressor. | 11-05-2015 |
20150330655 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus includes a compressor for compressing and discharging refrigerant; an outdoor heat exchanger for exchanging heat between the refrigerant and a heat medium that enters the outdoor heat exchanger; an indoor heat exchanger for exchanging heat between the refrigerant and a surrounding medium of use; a bypass pipe for bypassing the refrigerant that is to enter the outdoor heat exchanger; and a bypass flow control valve arranged on the bypass pipe, for adjusting a flow of the refrigerant that is to enter the outdoor heat exchanger, in which the outdoor heat exchanger includes a first passage through which the refrigerant flows, and a second passage through which the heat medium flows, and in which the first passage allows the refrigerant to flow upward. | 11-19-2015 |
Patent application number | Description | Published |
20120255320 | AIR-CONDITIONING HOT-WATER SUPPLY COMBINED SYSTEM - Provided is an air-conditioning hot-water supply combined system configured such that, in the case where all of load side units perform a cooling operation and a hot water load (heating load) is low during a cooling and heating mixed operation in a cooling cycle, an input of an air conditioning refrigerant block is reduced to increase the COP of the system. An air-conditioning hot-water supply combined system A reduces a target condensing temperature in a heat source unit in the case where a heating load in load side units and a hot water load in a hot water unit are less than a predetermined reference value in a cooling operation cycle state. | 10-11-2012 |
20130098092 | HEAT PUMP - A first bypass pipe has one end connected to a main pipe extending from a compressor to an indoor heat exchanger, and its other end branched off into parts that are each connected to the main pipe on an inlet side of an outdoor heat exchanger, and a second bypass pipe has one end connected to an injection port communicating with the compression chamber of the compressor in which compression is taking place and its other end branched off into parts that are each connected to the main pipe on an outlet side of the outdoor heat exchangers. During a defrosting operation that removes frost on the outdoor heat exchangers, a part of the refrigerant discharged from the compressor is supplied from the first bypass pipe to the outdoor heat exchanger to be defrosted, and is then passed through the second bypass pipe and injected from the injection port of the compressor. | 04-25-2013 |
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 |