Heat source unit and refrigeration apparatus
AssigneeDaikin Industries, Ltd.
InventorsNaoto KIMURA, Iwao SHINOHARA, Masaaki TAKEGAMI, Tetsuya SHIRASAKI
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Abstract
A heat-source-side circuit of a heat source unit includes a low-stage compressor, a high-stage compressor, a heat-source-side heat exchanger, a receiver, and a venting passage. The venting passage connects an upper portion of the receiver with an inlet of the high-stage compressor. A determination unit of the heat source unit determines that the amount of the refrigerant charged in a refrigerant circuit is excessive based on the pressure and the degree of superheat of the refrigerant sucked into the high-stage compressor.
Claims5
A heat source unit connected to a utilization-side unit and forming a refrigerant circuit configured to perform a refrigeration cycle, the heat source unit comprising:
- a heat-source-side circuit including a low-stage compressor, a high-stage compressor, a heat-source-side heat exchanger, and a receiver;
- and
- a determination unit configured to determine that an amount of a refrigerant charged in the refrigerant circuit is excessive,
- wherein
- the heat-source-side circuit includes a venting passage that connects an upper portion of the receiver with an inlet of the high-stage compressor, and
- the determination unit determines that the amount of the refrigerant charged in the refrigerant circuit is excessive based on a pressure and a degree of superheat of the refrigerant sucked into the high-stage compressor.
Dependencies are inferred from the claim text.