Patent ID: 7353664
Filing Date: 2008-04-08
Classification: F25B

Abstract:
1. A heat pump comprising: a compressor; indoor and outdoor heat exchangers for condensing or evaporating refrigerant compressed by the compressor according to cooling or heating operation mode; a four-way valve for guiding the flow of the compressed refrigerant to the indoor heat exchanger or the outdoor heat exchanger according to the cooling or heating operation mode; an expansion valve for selectively decreasing the pressure of liquid refrigerant according to the cooling or heating operation mode; a check valve selectively opened or closed according to the cooling or heating operation mode for guiding the flow of the liquid refrigerant to the expansion valve; an accumulator for preventing the liquid refrigerant from entering into the inlet of the compressor; a plurality of connection pipes for connecting the compressor, the indoor and outdoor heat exchangers, the four-way valve, the expansion valve, the check valve, and the accumulator to one another such that the compressor, the indoor and outdoor heat exchangers, the four-way valve, the expansion valve, the check valve, and the accumulator communicate with one another; and a heat exchange part for performing heat exchange between the connection pipe connected to the inlet of the accumulator and extending through the heat exchange part and the connection pipe connected to the indoor heat exchanger.