| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem in a heat pump air conditioning applying outdoor air as its heat source, that heating capacity is lowered when an outdoor air temperature is lowered, as a result, a coefficient of performance (COP) is lowered, and further it can not be used as a heater, when the outdoor air temperature is remarkably lowered. SOLUTION: According to this invention, as a refrigerant at a high pressure-side, of a refrigerant circuit for cooling storage equipment flows to a cascade heat exchanger without passing through a condenser in a heating operation of a refrigerant circuit for air conditioning, the waste heat from the high pressure-side refrigerant of the refrigerant circuit for cooling storage equipment can be efficiently recovered. In particular, as the high pressure-side refrigerant of the refrigerant circuit for cooling storage equipment flows to an evaporator without passing through the condenser, after it passes through the cascade heat exchanger, the heat is prevented from being excessively exhausted outdoors in the condenser when the outdoor temperature is low. COPYRIGHT: (C)2007,JPO&INPIT
|
