Heat pump type air conditioner for vehicle

摘要

A heat pump type air conditioner for a vehicle has a compressor to which a condenser and a inner heat exchanger are connected through a first switching valve. The condenser is connected at its refrigerant outlet to the inner heat exchanger through a second switching valve. An refrigerant outlet of the inner heat exchanger is connected to an evaporator through an expansion valve. A refrigerant outlet of the evaporator is connected to the compressor. The first switching valve functions to change the operation or the air conditioner between heating and cooling. The first and second switching valves function to allow to flow the refrigerant into the outer heat exchanger even if in heating, according to the thermal condition of the outer heat exchanger. Therefore, it becomes possible to stably implement heating without causing a stagnation of the refrigerant in the outer condenser even under a cold thermal condition.