Patent ID: 6808119
Filing Date: 2004-10-26
Classification: F25B

Abstract:
A heat pump air conditioning system with a heater, comprising:an air conditioner that conditions air of a room so as to satisfy a heating load via a heating cycle formed by a refrigerant passing through a compressor, a condenser, an expansion valve and an evaporator; a heater installed within the air conditioner and driven so as to rapidly satisfy the heating load; and a control unit that controls a compression capacity of the refrigerant according to the heating load and that controls an operation of the heater; wherein the air conditioner includes: a plurality of compressors that compress a gaseous refrigerant in a low-temperature and low-pressure state so as to convert it into a high-temperature and high-pressure state; a condenser that condenses the gaseous refrigerant in the high-temperature and high-pressure state so as to convert it into a liquid refrigerant in a mid-temperature and high-pressure state; an expansion valve that decompresses the liquid refrigerant in the mid-temperature and high-pressure state so as to convert it into a low-temperature and low-pressure state; and an evaporator that evaporates the liquid refrigerant in the low-temperature and low-pressure state so as to convert it into a gaseous refrigerant in a low-temperature and low-pressure state; and the control unit includes: a sensing unit that senses whether the heating load is increased; a compressor-driving unit that one of selectively and simultaneously operates a plurality of the compressors according to the increased heating load so as to variably control the compression capacity of the refrigerant; a measuring unit that measures a full activation standby time taken to simultaneously operate a plurality of the compressors; and a heater-driving unit that drives the heater during the full activation standby time measured by the measuring unit.