Refrigeration device and compression device
AssigneeDaikin Industries, Ltd.
InventorsAzuma Kondou, Takamasa Itou, Chiharu Tomita
Life of this patent
Estimating the term…
Abstract
A refrigerant circuit includes a first compressor connected to a first suction pipe and a first discharge pipe and configured to compress a refrigerant, a second compressor connected to a second suction pipe and a second discharge pipe and configured to compress the refrigerant discharged from the first compressor, a radiator, and a high-pressure passage connecting the second discharge pipe and the radiator. A first oil drain passage guides an oil in the second compressor to one of the first suction pipe and an intermediate port of the first compressor, without via the high-pressure passage.
Claims18
A refrigeration device comprising:
- a refrigerant circuit including
- a first compressor connected to a first suction pipe and a first discharge pipe and configured to compress a refrigerant,
- a second compressor connected to a second suction pipe and a second discharge pipe and configured to compress the refrigerant discharged from the first compressor,
- a radiator,
- a high-pressure passage connecting the second discharge pipe and the radiator;
- a first oil drain passage;
- an oil separator disposed on the high-pressure passage and configured to separate an oil from the refrigerant discharged from the second compressor;
- a first oil feed passage configured to guide the oil in the oil separator to the first oil drain passage, not via the second compressor,
- a second oil feed passage configured to guide the oil in the oil separator to the second compressor,
- wherein
- the first oil drain passage guides an oil in the second compressor to one of the first suction pipe and an intermediate port of the first compressor, without via the high-pressure passage.
A refrigeration device comprising
- a refrigerant circuit including
- a first compressor connected to a first suction pipe and a first discharge pipe and configured to compress a refrigerant,
- a second compressor connected to a second suction pipe and a second discharge pipe and configured to compress the refrigerant discharged from the first compressor,
- a radiator, and
- a high-pressure passage connecting the second discharge pipe and the radiator;
- a first oil drain passage,
- an oil separator disposed on the high-pressure passage and configured to separate an oil from the refrigerant discharged from the second compressor;
- a first oil feed passage configured to guide the oil in the oil separator to the first oil drain passage, and
- a second oil feed passage configured to guide the oil in the oil separator to the second compressor,
- wherein
- the first oil drain passage guides an oil in the second compressor to one of the first suction pipe and an intermediate port of the first compressor, without via the high-pressure passage.
A compression device for supplying a compressed refrigerant to a radiator, the compression device comprising:
- a first compressor connected to a first suction pipe and a first discharge pipe and configured to compress a refrigerant;
- a second compressor connected to a second suction pipe and a second discharge pipe and configured to compress the refrigerant discharged from the first compressor;
- a high-pressure passage connecting the second discharge pipe and the radiator;
- a first oil drain passage;
- an oil separator disposed on the high-pressure passage and configured to separate an oil from the refrigerant discharged from the second compressor;
- and
- a first oil feed passage configured to guide the oil in the oil separator to the first oil drain passage, not via the second compressor,
- wherein
- the first oil drain passage guides an oil in the second compressor to one of the first suction pipe and an intermediate port of the first compressor, without via the high-pressure passage.
Dependencies are inferred from the claim text.