| 摘要 |
PROBLEM TO BE SOLVED: To provide a compression refrigerating machine easily improved in a coefficient of performance, and an economizer unit which can be mounted to an existing compression refrigerating machine and improve the coefficient of performance. SOLUTION: The compression refrigerating machine includes: an evaporator 40 evaporating refrigerant liquid into refrigerant gas; a main compressor 10 sucking in and compressing the refrigerant gas; a condenser 30 drawing heat from the refrigerant gas compressed by the main compressor 10 to condense the same into the refrigerant liquid; an economizer 20 evaporating the refrigerant liquid condensed by the condenser 30 into the refrigerant gas at an economizer pressure Pm intermediate between the evaporating pressure Pe of the evaporator 40 and the condensing pressure Pc of the condenser 30, cooling the refrigerant liquid with the evaporation heat during the evaporation, and sending the cooled refrigerant liquid to the evaporator 30; and an auxiliary compressor 70 sucking in, compressing the refrigerant gas evaporated in the economizer 20 and sending the same to the condenser 30. COPYRIGHT: (C)2012,JPO&INPIT |
