ACCUMULATOR OF HEAT PUMP SYSTEM WITH PLURAL COMPRESSORS

摘要

PURPOSE: An accumulator of a heat pump system with plural compressors is provided to improve heat exchange efficiency by delaying frost of the heat exchanger with increasing temperature of refrigerant into the outdoor heat exchanger, and to increase performance of the compressor by supplying refrigerant vapor to the compressor sufficiently with controlling the heater of the accumulator according to operation of the compressors. CONSTITUTION: A heat pump system comprises plural compressors compressing refrigerant; a four-way valve installed in the discharge refrigerant pipe of the compressor to switch flow of refrigerant according to the operation mode; indoor and outdoor heat exchangers connected to the four-way valve to exchange heat of refrigerant with air; an expansion unit installed between the heat exchangers to expand refrigerant; and an accumulator(50) installed in the refrigerant inlet pipe of the compressor. A heater(53) is installed in the accumulator to generate refrigerant vapor by heating refrigerant.