Abstract: The purpose of the present invention is to integrate a heating air-conditioning configuration and a cooling system of a vehicle, to enable more efficient heating air conditioning. A vehicle air-conditioning device is provided with: a radiator used for cooling a vehicle-side heat-generating apparatus; a heater core that exchanges heat between a coolant and air to be blown into a vehicle cabin; and coolant passages through which the coolant flows so as to be circulated between the heater core and the radiator. Furthermore, the vehicle air-conditioning device is provided with a water heater which is integrated with a power element for air conditioning formed of a semiconductor element with high heat resistance and which causes the power element and a heat-generating body to heat the coolant flowing to the heater core.

Abstract: A vehicle air-conditioning system includes an HVAC unit that blows air whose temperature is adjusted by a refrigerant evaporator and a second refrigerant condenser. The system includes a heat pump cycle in which a refrigerant compressor, a refrigerant circuit changeover section, a first refrigerant condenser, a first expansion valve, and the refrigerant evaporator are sequentially connected. The system includes a second expansion valve and a refrigerant heat exchanger connected in parallel with the first expansion valve and the refrigerant evaporator. The second refrigerant condenser is connected in parallel with the first refrigerant condenser. The system includes a coolant cycle in which a coolant circulating pump, a ventilation-exhaust-heat recovery unit, a motor/battery, an electric heater, and the refrigerant heat exchanger are sequentially connected, and the ventilation-exhaust-heat recovery unit, motor/battery, and electric heater can be selectively used as a heat source.

Abstract: A vehicle air-conditioning system includes: an HVAC unit that blows air whose temperature has been adjusted by a refrigerant evaporator and a second refrigerant condenser; a heat pump cycle in which a refrigerant compressor, a refrigerant circuit changeover section, a first refrigerant condenser, a first expansion valve, and the refrigerant evaporator are sequentially connected, in which a second expansion valve and a refrigerant/coolant heat exchanger are connected in parallel with the first expansion valve and the refrigerant evaporator, and in which the second refrigerant condenser is connected in parallel with the first refrigerant condenser; and a coolant cycle in which a coolant circulating pump, a ventilation-exhaust-heat recovery unit, a motor/battery, an electric heater, and the refrigerant/coolant heat exchanger are sequentially connected, and in which the ventilation-exhaust-heat recovery unit, the motor/battery, and the electric heater can be selectively used as a heat source.