| CPC F25B 7/00 (2013.01) [F24F 11/89 (2018.01); F25B 9/008 (2013.01); H05K 7/20145 (2013.01)] | 17 Claims |
|
1. A cascade unit of a refrigeration cycle apparatus,
the refrigeration cycle apparatus including:
a first circuit including a first heat exchanger in which a heat medium carrying heat flows, the first heat exchanger causing a heat source and the heat medium to exchange heat with each other;
a second circuit in which a refrigerant flows, the second circuit including a compressor and a second heat exchanger that exchanges heat with indoor air; and
a cascade heat exchanger that exchanges heat between the heat medium flowing in the first circuit and the refrigerant flowing in the second circuit,
the cascade unit comprising:
the compressor configured to discharge the refrigerant in a supercritical state;
the cascade heat exchanger;
an electric component;
a fan that generates an air flow around the electric component;
a cascade casing that accommodates the compressor, the electric component, and the fan; and
an electric component casing that accommodates the electric component and is disposed above the compressor,
wherein the refrigerant is a refrigerant including a carbon dioxide refrigerant,
the electric component casing houses the fan and an electric component mounting plate to which the electric component is mounted, and has a first surface located between the compressor and the electric component and has a bottom surface located between the compressor and the electric component,
the electric component casing has an electric-component-casing-intake-opening,
the cascade casing has a cascade-casing-intake-opening,
the electric-component-casing-intake-opening and the cascade-casing-intake-opening overlap with each other in a front view of the cascade unit, and are configured to guide air outside the cascade casing into the electric component casing by driving of the fan,
the guided air is directed by a ventilation opening of the electric component mounting plate to flow along opposite sides of the electric component mounting plate within the electric component casing, and
the electric-component-casing-intake-opening is provided on neither the first surface nor the bottom surface.
|