| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump type air conditioning system which suitably warms air of a temperature regulation target despite low temperature of the outdoor air. <P>SOLUTION: The heat pump type air conditioning system includes: a compressor 11; a first condenser 12 which performs thermal conversion, in heating, between a refrigerant of high temperature and high pressure from the compressor 11 and air to warm the air and to condense the refrigerant; an expansion valve 15 which expands the refrigerant and varies the opening of the valve to vary the expansion rate of the refrigerant; a first evaporator 17 for evaporating the refrigerant; a temperature sensor 43 for detecting the outdoor air temperature; and an ECU 70 for controlling the opening of the expansion valve 15. The air conditioning system 1 has a heating circuit for circulating the refrigerant, in heating, through the compressor 11, first condenser 12, expansion valve 15, first evaporator 17 and compressor 11 in this order. When the outdoor air temperature is a predetermined temperature or lower, in heating the ECU 70 reduces the opening of the expansion valve 15 so as to enhance the enthalpy of the refrigerant flowing into the first condenser 12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
