Abstract: A refrigeration cycle includes a compressor, a refrigerant radiator, first and second expansion valves configured to decompress refrigerant flowing out of the refrigerant radiator, a first evaporator configured to evaporate the refrigerant flowing out of the first expansion valve, and a second evaporator configured to evaporate the refrigerant flowing out of the second expansion valve. A heat medium circuit includes a heat exchange portion and circulates a heat medium while flowing through the heat exchange portion and the second evaporator. The first evaporator exchanges heat between the refrigerant and ventilation air blown to a space to be air conditioned, and the second evaporator exchanges heat between the heat medium and the refrigerant to evaporate the refrigerant and cool the heat medium. The heat exchange portion is made to cool the temperature regulation target.

Abstract: A composite heat exchanger is used in a vapor compression refrigeration cycle. The vapor compression refrigeration cycle includes: a compressor; a decompressor configured to decompress a high-pressure refrigerant discharged from the compressor; and an evaporator configured to evaporate a low-pressure refrigerant decompressed at the decompressor by exchanging heat between the low-pressure refrigerant and a first heat medium. The composite heat exchanger includes a condenser unit, a liquid storage unit temporarily storing a high-pressure liquid refrigerant, a sub-cooler unit sub-cooling the high-pressure liquid refrigerant through heat exchange with a second heat medium, and an internal heat exchanger unit exchanging heat between the high-pressure liquid refrigerant passed through the sub-cooler unit and the low-pressure refrigerant. The condenser unit, the sub-cooler unit and the internal heat exchanger unit are joined together by a predetermined binding element and thereby form an integral structure.

Abstract: A housing forms: a first space and a second space; and a third space that is placed on one side relative to the first space and the second space in one direction. A primary partition partitions between the first space and the second space, and secondary partitions partition the first space into a plurality of subspaces. A valve element has: a first communication passage extending through the valve element in the one direction; and a second communication passage recessed on the valve element from another side toward the one side in the one direction. In response to movement of the valve element, the valve element changes a subspace to be communicated with the third space through the first communication passage among the plurality of subspaces and also changes another subspace to be communicated with the second space through the second communication passage among the plurality of subspaces.

Abstract: A first refrigeration cycle includes a first compressor, a first radiator, an air-conditioning expansion valve, an air-conditioning evaporator, a first expansion valve, and a first evaporator. In the first refrigeration cycle, a first refrigerant evaporates in at least one of the air-conditioning evaporator or the first evaporator. A second refrigeration cycle includes a second compressor, a second radiator, a second expansion valve, and a second evaporator. A heat transfer portion switches a heat radiation destination from the first radiator to a second refrigerant in the second evaporator or outside air. In the air-conditioning evaporator, the first refrigerant absorbs heat from ventilation air blown into a space to be air conditioned as the first refrigerant evaporates. In the first evaporator, the first refrigerant absorbs heat from the outside air as the first refrigerant evaporates. In the second radiator, the second radiator radiates heat from the second refrigerant to the ventilation air.

Abstract: A refrigeration cycle device includes a compressor, a radiator, a first decompression unit, a first evaporator, a second decompression unit, and a second evaporator. A refrigerant joining portion joins refrigerant having passed through the first evaporator and the second evaporator, on a refrigerant suction side of the compressor. The first decompression unit regulates a degree of superheating of the refrigerant between the first evaporator and the refrigerant joining portion on the basis of a first physical quantity having a correlation with the degree of superheating of the refrigerant flowing between the first evaporator and the refrigerant joining portion. The second decompression unit regulates a degree of superheating of the refrigerant between the refrigerant joining portion and the compressor on the basis of a second physical quantity having a correlation with the degree of superheating of the refrigerant flowing between the refrigerant joining portion and the compressor.

Abstract: A combined heat exchanger exchanges heat between a refrigerant circulating through a vapor compression type refrigeration cycle, a first heat medium flowing through a first heat medium circuit including a first heat generating element, and a second heat medium flowing through a second heat medium circuit including a second heat generating element. The combined heat exchanger includes a refrigerant flow channel portion through which the refrigerant flows, a first heat medium flow channel portion through which the first heat medium flows, and a second heat medium flow channel portion through which the second heat medium flows. The refrigerant flow channel portion, the first heat medium flow channel portion, and the second heat medium flow channel portion are arranged to transfer heat of the refrigerant to both the first heat medium and the second heat medium.

Abstract: In an air conditioner, a heat medium circuit includes: a first branch part, a first merging part, a second branch part, and a second merging part. A first flow rate adjusting unit is disposed in the heat medium circuit between the first branch part and an outside-air heat exchanger or between the outside-air heat exchanger and the first merging part, and a second flow rate adjusting unit is disposed in the heat medium circuit between the first branch part and the first heater core or between the first heater core and the first merging part. At least one of the first flow rate adjusting unit or the second flow rate adjusting unit is configured to optionally adjust the flow rate of the heat medium, and a controller controls the at least one of the first flow rate adjusting unit or the second flow rate adjusting unit.