| CPC F25B 7/00 (2013.01) [F25B 41/40 (2021.01)] | 20 Claims |
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1. A cascade unit of a refrigeration system including
a first circuit through which a heat medium carrying heat flows, including a first heat exchanger that exchanges heat between a heat source and the heat medium,
a second circuit including a compressor that compresses a refrigerant and a second heat exchanger that exchanges heat between the refrigerant and indoor air, the refrigerant circulating the second circuit,
a cascade heat exchanger that exchanges heat between the heat medium in the first circuit and the refrigerant in the second circuit,
the cascade unit comprising:
the cascaded heat exchanger;
the compressor; and
a casing that accommodates the cascade heat exchanger and the compressor, wherein
the first circuit includes a first connecting portion that connects a first pipe and a second pipe extending from the cascade heat exchanger, the first pipe and the second pipe connecting the first heat exchanger and the cascade heat exchanger, to the first pipe and the second pipe extending from the first heat exchanger inside or outside the casing,
the second circuit includes a second connecting portion that connects a liquid pipe and a gas pipe extending from the cascade heat exchanger, the liquid pipe and the gas pipe connecting the second heat exchanger and the cascade heat exchanger, the liquid pipe and the gas pipe extending from the second heat exchanger inside or outside the casing,
the first connecting portion and the second connecting portion are disposed close to each other,
the casing has a side surface that extends in a first direction extending up and down and a second direction intersecting the first direction, and
the first connecting portion and the second connecting portion are located on one side with respect to a center of the side surface in the second direction when viewed from the side surface.
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