Patent ID: RE43805

Claim:
Refrigeration/air conditioning equipment comprising: a compressor; a four-way valve; an indoor heat exchanger; a first decompressor; and an outdoor heat exchanger, wherein these components are coupled circularly, and heat is supplied from the indoor heat exchanger, the refrigeration/air conditioning equipment further comprising: an intermediate-pressure receiver disposed between the indoor heat exchanger and the first decompressor; a first internal heat exchanger that exchanges heat between a refrigerant in the intermediate-pressure receiver and a refrigerant in a suction pipe of the compressor; and an injection circuit in which part of a refrigerant between the indoor heat exchanger and the first decompressor is bypassed and is injected into a compression chamber in the compressor, the injection circuit comprising: a second decompressor; a second internal heat exchanger that exchanges heat between a refrigerant having a pressure reduced by the second decompressor and the refrigerant between the indoor heat exchanger and the first decompressor; and a heat source for heating a refrigerant, disposed between the second internal heat exchanger and the compressor.