| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a refrigerating device with an economizer circuit which can prevent excessive driving power of a compressor, a liquid back flow, or the like due to excessive refrigerant injection right after actuation, and eliminating setting of individual MOPs, capacities, or the like with respect to economizer expansion valves. <P>SOLUTION: The refrigerating device 1 with an economizer circuit includes the economizer circuit 22 separating one part of a liquid refrigerant condensed by a condenser 5, carrying out adiabatic expansion of the refrigerant by the economizer expansion valve 20, and then, guiding it to an intermediate heat exchanger 7, carrying out heat exchange with a liquid refrigerant, supercooling the liquid refrigerant, and injecting the evaporated separated refrigerant into a pressure chamber of a middle pressure of the compressor 2. The refrigerating device 1 includes refrigerant supply control means (19, 27) for carrying out inching operation of supply of the separated refrigerant to the economizer circuit 22 only at operation starting when the economizer circuit 22 is operated in a high temperature state of the intermediate heat exchanger 7. <P>COPYRIGHT: (C)2012,JPO&INPIT |
