Refrigeration/air conditioning equipment

摘要

Refrigeration/air conditioning equipment includes a first internal heat exchanger (18a) for exchanging heat between a refrigerant to be sucked in a compressor (3) and a high-pressure liquid refrigerant, an injection circuit (13) for evaporating a bypassed high-pressure liquid at intermediate pressure and injecting the vaporized refrigerant into the compressor (3), a second internal heat exchanger (10) for exchanging heat between the high-pressure liquid refrigerant and the refrigerant to be injected, and a heat source (17) for heating the refrigerant to be injected.