Patent ID: 8997503
Filing Date: 2015-04-07
Classification: B60H,B60L,Y02T

Abstract:
1. A vehicle air-conditioning system comprising: an HVAC unit that blows, into a vehicle interior, air whose temperature has been adjusted by a refrigerant evaporator and a second refrigerant condenser that are provided in a blowing path of a blower; a heat pump cycle in which a refrigerant compressor, a refrigerant circuit changeover section that changes a refrigerant circulating direction, a first refrigerant condenser that condenses refrigerant by performing heat exchange with outside air, a first expansion valve, and the refrigerant evaporator are connected in this order; a second expansion valve and a refrigerant/coolant heat exchanger are connected in parallel with the first expansion valve and the refrigerant evaporator; and the second refrigerant condenser is connected in parallel with the first refrigerant condenser via the refrigerant circuit changeover section; and a coolant cycle in which a coolant circulating pump, a ventilation-exhaust-heat recovery unit that recovers heat from exhaust air from the vehicle interior, a motor/battery, an electric heater, and the refrigerant/coolant heat exchanger are sequentially connected; and the ventilation-exhaust-heat recovery unit, the motor/battery, and the electric heater can be selectively used as a heat source, wherein the coolant cycle comprises a first bypass circuit for bypassing the ventilation-exhaust-heat recovery unit and the motor/battery and a second bypass circuit for bypassing the ventilation-exhaust-heat recovery unit, wherein, at the refrigerant/coolant heat exchanger, the coolant cycle recovers heat selectively from the ventilation-exhaust-heat recovery unit, the motor/battery, and the electric heater, from the ventilation-exhaust-heat recovery unit and the motor/battery, from the motor/battery and the electric heater, from the motor/battery, or from the electric heater; and the heat pump cycle can be operated in any operation mode of heating control and dehumidifying and heating control, by using the heat recovered at the refrigerant/coolant heat exchanger as a heat source.