An air conditioner for a vehicle having a compressor, an outer heat exchanger, a heat-radiating inner heat exchanger an expansion valve, a heat-absorbing inner heat exchanger which are connected therebetween. A connecting condition of these elements is changed into one of a cooling, a first heating
An air conditioner for a vehicle having a compressor, an outer heat exchanger, a heat-radiating inner heat exchanger an expansion valve, a heat-absorbing inner heat exchanger which are connected therebetween. A connecting condition of these elements is changed into one of a cooling, a first heating and a second heating, by controlling a refrigerant passage switching device. During the cooling, refrigerant in the air conditioner is circulated in the order of at least the outer heat exchanger, the expansion valve, the heat-absorbing inner heat exchanger and the compressor. During the first heating the refrigerant is circulated in the order of the heat-radiating inner heat exchanger, the expansion valve, the heat-absorbing inner heat exchanger and the compressor while bypassing the outer heat exchanger. During the second heating, the refrigerant is circulated in the order of the heat-radiating inner heat exchanger, the expansion valve, at least the outer heat exchanger and the compressor. Therefore, it becomes possible to implement a heating operation in a wide-range from an intensely cold condition to a slightly cool condition while saving an energy consumption.
대표청구항▼
An air conditioner for a vehicle, comprising: refrigerant; a compressor applying a workload to said refrigerant, said compressor having a refrigerant suction side and a refrigerant discharge side; an outer heat exchanger transmitting heat between said refrigerant and ambient air, said outer heat exc
An air conditioner for a vehicle, comprising: refrigerant; a compressor applying a workload to said refrigerant, said compressor having a refrigerant suction side and a refrigerant discharge side; an outer heat exchanger transmitting heat between said refrigerant and ambient air, said outer heat exchanger having a first side and a second side; a blower leading air for air-conditioning a passenger compartment of the vehicle; a heat-radiating inner heat exchanger transmitting the heat of said refrigerant to the air led by said blower, said heat-radiating inner heat exchanger having a refrigerant inlet side and a refrigerant outlet side; an expansion valve adiabatically expanding said refrigerant, said expansion value having a refrigerant inlet side and a refrigerant outlet side; a heat-absorbing inner heat exchanger transmitting the heat of the air led by said blower to said refrigerant, said heat-absorbing heat exchanger having a refrigerant inlet side and a refrigerant outlet side; and refrigerant passage switching means for setting a refrigeration cycle to one of a cooling mode, a heating mode and a weak heating mode, said refrigerant passage switching means including a plurality of parallel auxiliary conduits which connect said heat-absorbing inner heat exchanger and said outer heat exchanger in parallel during the weak heating mode, in the cooling mode, said refrigerant flowing in the order of said compressor, said outer heat exchanger, said expansion valve, said heat-absorbing inner heat exchanger and said compressor, in the heating mode, said refrigerant flowing in the order of said compressor, said heat-radiating inner heat exchanger, said expansion valve, said heat-absorbing inner heat exchanger and said compressor while bypassing said outer heat exchanger, and in the weak heating mode, said refrigerant flowing in the order of said compressor, said heat-radiating inner heat exchanger, said expansion valve, said outer heat exchanger and said compressor.
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