The present invention provides a cooling/heating vapor injection system comprising: a compressor that compresses and circulates a refrigerant; a first branch part into which the compressed refrigerant is introduced to be branched; a first refrigerant line which is branched from the first branch part to allow the refrigerant to move therein, and has a condenser and a first expansion valve disposed therein; a second refrigerant line which is branched from the first branch part to allow the refrigerant to move therein, and has an indoor unit and a second expansion valve disposed therein; a gas-liquid separator into which the refrigerant passing through the 10 first refrigerant line or the second refrigerant line flows; and a second branch part into which the refrigerant passing through the gas-liquid separator flows, wherein the gas-liquid separator moves a liquid-phase refrigerant to the second branch part, and moves a gas-phase refrigerant to the compressor.

An embodiment heat pump system for a vehicle includes a valve module for controlling a flow of a coolant according to a selected mode for temperature adjustment of a vehicle interior and temperature adjustment of a battery module, a first line connected to the valve module, an electrical component on the first line, a second line connected to the first line and the valve module, a radiator on the second line, a third line connected to the valve module, wherein the battery module is on the third line, a fourth line connected to the valve module and the third line, a fifth line connected to the valve module, a chiller on the fifth line, a sixth line connected to the first line and the fifth line, and a seventh line connected to the third line and the fifth line.

Methods and system for providing heat to a vehicle are presented, whereby a refrigerant loop is operated to heat a cabin of the vehicle via heat generated by a compressor and heat generated by a resistive heating element. The heat generated by the compressor and the heat generated by the resistive heating element are transferred to a refrigerant before it is transferred to the cabin. In one example, in a first mode, an evaporator bypass valve on an evaporator bypass conduit of the A/C system is opened to route the refrigerant around an evaporator of the A/C system to increase a temperature of the refrigerant in the refrigerant loop; and in a second mode, the evaporator bypass valve is closed to route the refrigerant through the evaporator, where heat is released to a flow of air across the evaporator that is directed to the vehicle cabin.

The present invention aims to suppress a coolant from bypassing a non-cooling unit without lowering the productivity. The power converter according to the present invention includes: a power semiconductor module; and a flow path forming body having a flow path in which the power semiconductor module is disposed and an opening which is connected with the flow path, wherein the power semiconductor module includes a first fin formed on one surface and a second fin formed on another surface which faces the one surface so as to sandwich the semiconductor element, the flow path forming body has a first coolant control unit and a second coolant control unit which are arranged so as to sandwich the first fin, the first coolant control unit and the second coolant control unit are formed to be overlapped with a region of the power semiconductor module where the first fin is not formed, and a first flow path is formed along the first coolant control unit and the second coolant control unit.

There is disclosed an air conditioning device for vehicle in which in a defrosting mode to defrost an outdoor heat exchanger, the defrosting of the outdoor heat exchanger can be achieved without hindrance while maintaining heating of a vehicle interior. A refrigerant discharged from a compressor 2 radiates heat in a radiator 4 and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in an outdoor heat exchanger 7 to heat the vehicle interior. The air conditioning device for vehicle includes an injection circuit 40 which distributes a part of the refrigerant flowing out from the radiator 4 to return the part to the compressor 2. When a controller 32 passes the high-temperature refrigerant through the outdoor heat exchanger 7 to perform defrosting, the controller operates the injection circuit 40 to return the refrigerant to the compressor 2.

A pilot on-off valve in a refrigeration cycle device includes a main on-off valve that opens or closes a bypass passage through which a high-pressure side portion and a low-pressure side portion of a cycle communicate with each other, and a pilot valve that opens or closes a communication passage through which an inflow port and an outflow port of the pilot on-off valve communicate with each other. When the main on-off valve opens the bypass passage, the pilot valve opens the communication passage in a state where a refrigerant passage, in which a refrigerant flowing out of the pilot on-off valve flows, is closed.

A heat exchange system for a vehicle including a battery, an electric motor, and a transmission system is provided. The heat exchange system includes a heat pump, and a heat exchanger. The heat pump is used for air conditioning. The heat pump includes an electric compressor that compresses a refrigerant. The electric compressor is configured to be driven with electric power from the battery. The heat exchanger is configured to exchange heat between the refrigerant and lubricating oil that lubricates the transmission system.

There is disclosed an air conditioning device for vehicle in which in a defrosting mode to defrost an outdoor heat exchanger, the defrosting of the outdoor heat exchanger can be achieved without hindrance while maintaining heating of a vehicle interior. A refrigerant discharged from a compressor 2 radiates heat in a radiator 4 and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in an outdoor heat exchanger 7 to heat the vehicle interior. The air conditioning device for vehicle includes an injection circuit 40 which distributes a part of the refrigerant flowing out from the radiator 4 to return the part to the compressor 2. When a controller 32 passes the high-temperature refrigerant through the outdoor heat exchanger 7 to perform defrosting, the controller operates the injection circuit 40 to return the refrigerant to the compressor 2.

The invention relates to a flow circuit system (1) for a vehicle, with a first flow circuit (10) guiding a first fluid and operable as a heat pump, and a second flow circuit (50) with a conveying device (31) guiding a second fluid, and a switching device (35), wherein in the provided flow direction of the first fluid downstream of a compressor (3) and upstream of an expansion element (15), at least one first heat exchanger (7) between the first and second fluids, wherein the second flow circuit (50) has at least two flow circuit modes, wherein in the first flow circuit mode, apart from the at least one conveying device (31) for the second fluid and the at least one first heat exchanger (7), at least one outside heat exchanger (37) which may be flowed through by the second fluid and is configured as a radiator is connected to the second flow circuit (50), and in the second flow circuit mode this at least one outside heat exchanger (37) is not connected to the at least second flow circuit (50) containing the conveyor device (31) and the first heat exchanger (7), and preferably is also a heating flow circuit. In this way more flexibility is created in the flow circuit system (1) for a vehicle.

A vehicular air conditioning device includes a blower, a heating heat exchanger, an auxiliary heater, and a blower controller. The heating heat exchanger heats blown air by exchanging heat between the blown air and the cooling water of the in-vehicle device emitting heat during operation. The blower controller is configured to control the operation of the blower. The blower controller is configured to increase a blowing capacity of the blower with increase of a temperature of the cooling water. The blower controller, during operation of the auxiliary heater, increases the blowing capacity after a waiting time during which the increase of the blowing capacity is prohibited has elapsed since a start-up switch of a vehicle system is turned on. The vehicular air conditioning is capable of implementing a quick warming of the in-vehicle device without impairing the heating feeling of occupant.