Abstract: A heat exchange system includes an outdoor heat exchanger, an indoor heat exchanger, a compressor, an expansion valve, a capillary tube, and a cooling jacket. The compressor is provided on a first path that is one of two paths connecting the outdoor heat exchanger and the indoor heat exchanger, and the expansion valve, the capillary tube and a check valve are provided on a second path of the two paths connecting the outdoor heat exchanger and the indoor heat exchanger that is opposite to the path on which the compressor is provided. The cooling jacket for cooling an object to be cooled is provided between the expansion valve and the capillary tube.

Abstract: A valve case (11) includes a plurality of ports (P1, P2, P3, . . . ). A valve body (50) rotates in the valve case (11) and slide on openings of predetermined ones of the ports (P1, P2, P3, . . . ) to switch a communication state among the ports (P1, P2, P3, . . . ). A motor (31) rotates the valve body (50). A controller (500) controls a rotation speed (?) of the motor (31) in accordance with a differential pressure (?P) between internal and external pressures of the valve body (50).

Abstract: A refrigeration device includes a compressor, an outdoor heat exchanger, an expansion mechanism, an indoor heat exchanger, and a storage tank. The compressor, the outdoor heat exchanger, the expansion mechanism and the indoor heat exchanger are connected to each other. During a cooling operation, a refrigerant flows sequentially through the compressor, the outdoor heat exchanger, the expansion mechanism, and the indoor heat exchanger. During a heating operation, the refrigerant flows sequentially through the compressor, the indoor heat exchanger, the expansion mechanism, and the outdoor heat. The storage tank is configured to store the refrigerant and is provided between the outdoor heat exchanger and the expansion mechanism. The refrigeration device uses R32 as the refrigerant. A capacity of the outdoor heat exchanger is less than or equal to a capacity of the indoor heat exchanger.

Abstract: In an air-conditioning apparatus, refrigerant flows sequentially through a compressor, an outdoor heat exchanger, expansion mechanisms, and an indoor heat exchanger during a cooling operation, and refrigerant flows sequentially through the compressor, the indoor heat exchanger, the expansion mechanisms, and the outdoor heat exchanger during a heating operation. Capacity of the outdoor heat exchanger is 30% to 90% of the indoor heat exchanger. The expansion mechanisms include an upstream-side and downstream-side expansion mechanisms depressurizing refrigerant from high to intermediate pressure, and from intermediate to low pressure in the refrigerant cycle, respectively. The refrigerant is R32. A refrigerant storage tank that stores the intermediate pressure refrigerant is provided between the upstream-side and downstream side expansion mechanisms.

Abstract: A valve case (11) includes a plurality of ports (P1, P2, P3, . . . ). A valve body (50) rotates in the valve case (11) and slide on openings of predetermined ones of the ports (P1, P2, P3, . . . ) to switch a communication state among the ports (P1, P2, P3, . . . ). A motor (31) rotates the valve body (50). A controller (500) controls a rotation speed (?) of the motor (31) in accordance with a differential pressure (?P) between internal and external pressures of the valve body (50).

Abstract: An outdoor unit includes: a compressor, and a sound deadening material having sound deadening properties. The sound deadening material includes a first sound absorbing material made of glass fibers, a first scatter prevention member which prevents scattering of the glass fiber from one principal surface of the first sound absorbing material by covering the one principal surface, and a second scatter prevention member which prevents scattering of the glass fiber from the other the other principal surface of the first sound absorbing material by covering the other principal surface. The first scatter prevention member is a sound absorbing material made of fibers having high fiber strength than the glass fibers. The second scatter prevention member is a sound insulating material. The sound deadening material is wound around the compressor so that the first scatter prevention member faces the compressor.

Abstract: A movable valve element is provided so as to rotate about a predetermined shaft center. A first valve seat and a second valve seat are respectively arranged apart from the movable valve element with predetermined clearances on both sides of the movable valve element in a direction along the shaft center. A first sealing member is arranged around a communication path so as to seal a space inside the communication path from a space defined by the clearance on a side close to the first valve seat. A second sealing member is arranged around the communication path so as to seal the space inside the communication path from a space defined by the clearance on a side close to the second valve seat.

Abstract: A refrigeration circuit includes a compressor, an outdoor heat exchanger, an expansion valve, an indoor heat exchanger, and a refrigerant storage tank provided between the outdoor heat exchanger and the expansion value. Refrigerant sequentially flows through the compressor, the outdoor heat exchanger, the expansion valve and the indoor heat exchanger during an air-cooling operation. Refrigerant sequentially flows through the compressor, the indoor heat exchanger, the expansion valve, and the outdoor heat exchanger during an air-warming operation. Preferably the indoor heat exchanger is a cross-fin heat exchanger, and the outdoor heat exchanger is a stacked heat exchanger. Preferably, a capacity of the outdoor heat exchanger is no more than 100% of a capacity of the indoor heat exchanger.

Abstract: A movable valve element is provided so as to rotate about a predetermined shaft center. A first valve seat and a second valve seat are respectively arranged apart from the movable valve element with predetermined clearances on both sides of the movable valve element in a direction along the shaft center. A first sealing member is arranged around a communication path so as to seal a space inside the communication path from a space defined by the clearance on a side close to the first valve seat. A second sealing member is arranged around the communication path so as to seal the space inside the communication path from a space defined by the clearance on a side close to the second valve seat.

Abstract: An air conditioning apparatus includes a heat source unit, a first utilization unit, a second utilization unit, a refrigerant communication pipe and a control section. The heat source unit includes a heat source side compressor, a heat source side heat exchanger and a heat source side expansion mechanism. The first utilization unit includes a first utilization side compressor, a first utilization side heat exchanger and a first utilization side expansion mechanism. The second utilization unit includes a second utilization side compressor, a second utilization side heat exchanger and a second utilization side expansion mechanism. The control section is configured to control the first utilization side compressor and the first utilization side expansion mechanism in accordance with operation load of the first utilization unit, and to control the second utilization side compressor and the second utilization side expansion mechanism in accordance with operation load of the second utilization unit.

Abstract: An air conditioning apparatus includes a supercooling heat exchanger configured to exchange heat between a high-pressure refrigerant and a low-pressure refrigerant. A high-pressure liquid refrigerant pipe is wound around an external periphery of a low-pressure refrigerant suction pipe. Preferably, the supercooling heat exchanger is disposed inside the indoor unit at a position below an evaporator. Drain water from the evaporator is dispersed over the supercooling heat exchanger or a drain pipe leading from a drain pan of the evaporator is wound together with the high-pressure liquid refrigerant pipe around the low-pressure refrigerant suction pipe. In either case, cold energy of the drain water effectively acts on the high-pressure liquid refrigerant pipe to exchange heat. The supercooling heat exchanger operates with improved efficiency without any increase in the volume of the heat exchanger so that the evaporator can be made as small and compact as possible.

Abstract: A refrigerant flow dividing apparatus of a heat exchanger for refrigerating apparatus is provided with a minimal number of refrigerant flow regulating valves and suppresses increase in the size and costs of the apparatus. Refrigerant is supplied to paths of the heat exchanger for refrigerating apparatus including a heat exchanger for reheat dehumidification via a refrigerant flow divider provided with paths. Each path of the refrigerant flow divider is provided with a refrigerant flow regulating valve, and a predetermined one of the refrigerant flow regulating valves of the paths also functions as a reheat dehumidification valve.

Abstract: An air conditioning apparatus includes a heat source unit, a first utilization unit, a second utilization unit, a refrigerant communication pipe and a control section. The heat source unit includes a heat source side compressor, a heat source side heat exchanger and a heat source side expansion mechanism. The first utilization unit includes a first utilization side compressor, a first utilization side heat exchanger and a first utilization side expansion mechanism. The second utilization unit includes a second utilization side compressor, a second utilization side heat exchanger and a second utilization side expansion mechanism. The control section is configured to control the first utilization side compressor and the first utilization side expansion mechanism in accordance with operation load of the first utilization unit, and to control the second utilization side compressor and the second utilization side expansion mechanism in accordance with operation load of the second utilization unit.

Abstract: A heat exchange system includes an outdoor heat exchanger, an indoor heat exchanger, a compressor, an expansion valve, a capillary tube, and a cooling jacket. The compressor is provided on a first path that is one of two paths connecting the outdoor heat exchanger and the indoor heat exchanger, and the expansion valve, the capillary tube and a check valve are provided on a second path of the two paths connecting the outdoor heat exchanger and the indoor heat exchanger that is opposite to the path on which the compressor is provided. The cooling jacket for cooling an object to be cooled is provided between the expansion valve and the capillary tube.

Abstract: An air conditioning apparatus includes a supercooling heat exchanger configured to exchange heat between a high-pressure refrigerant and a low-pressure refrigerant. A high-pressure liquid refrigerant pipe is wound around an external periphery of a low-pressure refrigerant suction pipe. Preferably, the supercooling heat exchanger is disposed inside the indoor unit at a position below an evaporator. Drain water from the evaporator is dispersed over the supercooling heat exchanger or a drain pipe leading from a drain pan of the evaporator is wound together with the high-pressure liquid refrigerant pipe around the low-pressure refrigerant suction pipe. In either case, cold energy of the drain water is made to effectively acts on the high-pressure liquid refrigerant pipe to exchange heat. The supercooling heat exchanger operates with improved efficiency without any increase in the volume of the heat exchanger so that the evaporator can be made as small and compact as possible.

Abstract: It is an object of this invention to provide an air conditioning apparatus using supercritical refrigerant for easily regulating the circulation amount of refrigerant. A refrigeration apparatus (1b) uses refrigerant operating in the supercritical zone. The refrigeration apparatus (1b) includes a compressor (21), a first heat exchanger (23), a first expansion mechanism (V2), a subcooling heat exchanger (24), a second expansion mechanism (V3), a second heat exchanger (31) and a control section (5). The compressor is configured to compress the refrigerant. The first heat exchanger is configured to cool the high-pressure refrigerant compressed by the compressor. The first expansion mechanism is configured to decompress the refrigerant to critical pressure or less. The subcooling heat exchanger is configured to subcool the refrigerant decompressed by the first expansion mechanism. The second expansion mechanism is configured to decompress the refrigerant cooled by the subcooling heat exchanger to low pressure.

Abstract: A supercooling heat exchanger of an air conditioning apparatus is configured to exchange heat between a high-pressure refrigerant and a low-pressure refrigerant. The supercooling heat exchanger is divided into first and second heat exchangers. One of the first and second heat exchangers is disposed so that the high-pressure refrigerant and the low-pressure refrigerant flow countercurrent to each other. The other of the first and second heat exchangers is disposed so that the high-pressure refrigerant and the low-pressure refrigerant flow parallel to each other. Preferably, both heat exchangers have a high-pressure liquid refrigerant pipe that is wound around the external periphery of a low-pressure refrigerant suction pipe. The heat exchangers are thereby reduced in size.

Abstract: A controller of a refrigerant flow divider of a heat exchanger for a refrigerating device is provided. The controller supplies refrigerant to each one of a plurality of paths of the heat exchanger through the refrigerant flow divider having a plurality of paths. An electromagnetic on-off valve is provided in each of the paths of the refrigerant flow divider. The flow rate of the refrigerant in each path is adjusted relatively in correspondence with the difference in the number of times of the opening and closing per unit time among the electromagnetic on-off valves.

Abstract: An air conditioner that reverses and appropriately controls the stream of refrigerant between paths of a flow divider corresponding to an air conditioner heat exchanger having a plurality of paths to increase the heat exchange capacity is provided. The air conditioner includes a compressor, a four-way valve, an outdoor heat exchanger, a restriction device, and an indoor heat exchanger including a plurality of paths. These members are sequentially connected by a refrigerant pipe to form a refrigerant circuit. A flow divider including a plurality of paths is arranged between the indoor heat exchanger, which includes the plurality of paths, and the restriction device. A refrigerant flow amount regulation valve is provided for each of the plurality of paths in the flow divider.

Abstract: A refrigerant flow dividing apparatus of a heat exchanger for refrigerating apparatus is provided with a minimal number of refrigerant flow regulating valves and suppresses increase in the size and costs of the apparatus. Refrigerant is supplied to paths of the heat exchanger for refrigerating apparatus including a heat exchanger for reheat dehumidification via a refrigerant flow divider provided with paths. Each path of the refrigerant flow divider is provided with a refrigerant flow regulating valve, and a predetermined one of the refrigerant flow regulating valves of the paths also functions as a reheat dehumidification valve.