Ejector cycle system
AssigneeDenso Corporation
InventorsHirotsugu Takeuchi, Makoto Ikegami
Life of this patent
Estimating the term…
Abstract
In an ejector cycle system, hot gas refrigerant discharged from a compressor is introduced into an evaporator through a bypass passage while bypassing an ejector and a gas-liquid separator in a defrosting operation for defrosting frost generated on the evaporator. In addition, a throttle or a check valve is provided in a refrigerant passage from the gas-liquid separator to a refrigerant inlet side of the evaporator. Accordingly, in the defrosting operation, the hot gas refrigerant from the compressor can be accurately introduced into the evaporator through the bypass passage without flowing toward the gas-liquid separator.
Claims17
An ejector cycle system comprising:
- a compressor for sucking and compressing refrigerant;
- a radiator which cools refrigerant discharged from the compressor;
- an evaporator for evaporating the refrigerant to obtain cooling capacity;
- an ejector including a nozzle for converting a pressure energy of high-pressure refrigerant from the radiator to a speed energy so that the high-pressure refrigerant is decompressed and expanded, and a pressure-increasing portion in which the speed energy is converted to the pressure energy so that the pressure of refrigerant is increased while refrigerant discharged from the nozzle and gas refrigerant from the evaporator are mixed;
- a gas-liquid separator for separating refrigerant flowing from the ejector into gas refrigerant and liquid refrigerant, the gas-liquid separator having a gas refrigerant outlet coupled to a refrigerant suction side of the compressor, and a liquid refrigerant outlet coupled to a side of the evaporator;
- and
- a bypass passage through which refrigerant discharged from the compressor is introduced into the evaporator while bypassing the ejector and the gas-liquid separator, in a defrosting operation for defrosting the evaporator.
An ejector cycle system comprising:
- a compressor for sucking and compressing refrigerant;
- a radiator which cools refrigerant discharged from the compressor;
- an evaporator for evaporating the refrigerant to obtain cooling capacity;
- an ejector including a nozzle for converting a pressure energy of high-pressure refrigerant from the radiator to a speed energy so that the high-pressure side refrigerant is decompressed and expanded, and a pressure-increasing portion in which the speed energy is converted to the pressure energy so that the pressure of refrigerant is increased while refrigerant discharged from the nozzle and gas refrigerant from the evaporator are mixed;
- a first gas-liquid separator for separating refrigerant flowing from the ejector into gas refrigerant and liquid refrigerant, the first gas-liquid separator having a gas refrigerant outlet coupled to a refrigerant suction side of the compressor, and a liquid refrigerant outlet coupled to a side of the evaporator;
- and
- bypass means for introducing refrigerant discharged from the compressor into the evaporator while bypassing the ejector and the first gas-liquid separator, in a defrosting operation for defrosting the evaporator.
Dependencies are inferred from the claim text.