REFRIGERATION DEVICE

摘要

Provided is a refrigeration device that efficiently employs an ejector in a refrigeration cycle. A first-stage ejector 41a provided in a refrigeration device sucks a refrigerant gas by the ejection of a high-pressure refrigerant liquid obtained by condensing a high-pressure refrigerant gas emitted from a compressor 20, and increases the pressure of a mixed fluid thereof. A first-stage heat exchanger 34a cools a fluid to be cooled by exchanging heat with the mixed fluid the pressure of which has been increased by the first-stage ejector 41a. A first-stage gas-liquid separator 33a separates a liquid accompanying the refrigerant gas generated by the first-stage heat exchanger 34a, and sends the liquid to the compressor 20. A next-stage heat exchanger 34b cools the fluid to be cooled by exchanging heat with a refrigerant obtained by expanding, with an expander 36b, the refrigerant liquid that did not vaporize in the first-stage heat exchanger 34a. The refrigeration device also includes a flow path 501 that supplies a refrigerant gas generated by the next-stage heat exchanger 34b to a suction opening 413 of the first-stage ejector 41a.