Evaporator unit and ejector type refrigeration cycle
AssigneeDenso Corporation
InventorsThuya Aung, Yoshiyuki Okamoto
Life of this patent
Estimating the term…
Abstract
An evaporator unit includes an ejector, an upwind side heat exchanger for evaporating a discharge side refrigerant flowing from the ejector, and a downwind side heat exchanger for evaporating a suction side refrigerant to be drawn into the ejector. The ejector has a nozzle for decompressing refrigerant, and a refrigerant suction port, from which refrigerant is drawn by a high-speed flow of refrigerant jetted from the nozzle. The upwind side heat exchanger has a refrigerant superheat area, which is offset from a refrigerant superheat area of the downwind side heat exchanger in a direction perpendicular to an air flow to be cooled.
Claims13
An evaporator unit comprising:
- an ejector having a nozzle for decompressing refrigerant, and a refrigerant suction port, from which refrigerant is drawn by a high-speed flow of refrigerant jetted from the nozzle;
- an upwind side heat exchanger located at an upwind side of air flow for exchanging heat with refrigerant, wherein the upwind side heat exchanger evaporates a discharge side refrigerant flowing out of an outlet of the ejector;
- and
- a downwind side heat exchanger located at a downwind side of the upwind side heat exchanger in the air flow, wherein at least a part of the downwind side heat exchanger evaporates a suction side refrigerant to be drawn into the refrigerant suction port of the ejector,
- the upwind side heat exchanger has a refrigerant superheat area, which is offset from a refrigerant superheat area of the downwind side heat exchanger in a direction perpendicular to the air flow.
An ejector type refrigeration cycle, comprising:
- a compressor for compressing refrigerant;
- a radiator for radiating heat of a high-temperature and high-pressure refrigerant flowing from the compressor;
- and
- an evaporator unit which includes
- an ejector having a nozzle for decompressing refrigerant, and a refrigerant suction port from which refrigerant is drawn by a high-speed flow of refrigerant jetted from the nozzle,
- an upwind side heat exchanger located at an upwind side of air flow for exchanging heat with refrigerant, wherein the upwind side heat exchanger evaporates a discharge side refrigerant flowing out of an outlet of the ejector, and
- a downwind side heat exchanger located at a downwind side of the upwind side heat exchanger in the air flow, wherein at least a part of the downwind side heat exchanger evaporates a suction side refrigerant to be drawn into the refrigerant suction port of the ejector,
- the downwind side heat exchanger includes a first heat exchanging portion for evaporating the discharge side refrigerant, and a second heat exchanging portion for evaporating the suction side refrigerant,
- the evaporator unit has an occupancy rate of the second heat exchanging portion to the downwind side heat exchanger,
- the evaporator unit has a flowing ratio of a flowing amount of the suction side refrigerant to a flowing amount of refrigerant discharged from the compressor, and
- the flowing ratio is set in accordance with the occupancy rate.
Dependencies are inferred from the claim text.