초록 ▼

The waste heat from a heating part mounted on a vehicle is recovered and extracted by a refrigerant for gas injection so that the heating capacity at a low ambient temperature may be effectively improved while suppressing an increase in the power consumption. At the heating time, the refrigerant is

The waste heat from a heating part mounted on a vehicle is recovered and extracted by a refrigerant for gas injection so that the heating capacity at a low ambient temperature may be effectively improved while suppressing an increase in the power consumption. At the heating time, the refrigerant is circulated in a closed circuit composed of a compressor, an indoor heat exchanger, a pressure regulator and an outdoor heat exchanger, and the refrigerant, as condensed in the indoor heat exchanger, is regulated to an intermediate pressure by a pressure regulator and introduced into a heat exchanger. In this heat exchanger, the refrigerant extracts the heat from the heating part at the side of the vehicle so that it evaporates. The refrigerant thus having evaporated is introduced through an evaporation pressure regulating valve via a gas injection passage into a gas injection port of the compressor.

대표청구항 ▼

[ What is claimed is:] [1.] A vehicular air conditioner system comprising:an air conditioning duct provided at its one end with air inlet ports and at its other end with outlet ports into a compartment of a vehicle;a blower disposed in said air conditioning duct for blowing air through said air cond

[ What is claimed is:] [1.] A vehicular air conditioner system comprising:an air conditioning duct provided at its one end with air inlet ports and at its other end with outlet ports into a compartment of a vehicle;a blower disposed in said air conditioning duct for blowing air through said air conditioning duct from said inlet ports to said outlet ports;an indoor heat exchanger disposed in said air conditioning duct for exchanging the heat with said air;an outdoor heat exchanger disposed outside of said air conditioning duct for exchanging the heat between an outside air and a refrigerant;a first pressure regulator interposed between said indoor heat exchanger and said outdoor heat exchanger for regulating the pressure of said refrigerant;a compressor having an intake port for inhaling the refrigerant at the lower pressure side of a refrigerating cycle, a gas injection port for introducing the gas refrigerant under an intermediate pressure of the refrigerating cycle, and a discharge port for discharging the compressed refrigerant;a second pressure regulator for regulating the condensed refrigerant at a higher pressure side of the refrigerating cycle to the intermediate pressure;a heat exchanger adapted to receive the refrigerant under the intermediate pressure and to cause the refrigerant under the intermediate pressure to extract the heat from a beating part, as mounted on the vehicle, and to evaporate; anda gas injection passage for introducing the gas refrigerant, as evaporated in said heat exchanger, into said gas injection port,wherein there is set at least a heating mode, in which said indoor heat exchanger can act as a condenser, and a cooling mode in which said indoor heat exchanger can act as an evaporator.