Ejector cycle device
First Claim
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1. An ejector cycle device comprising:
- a compressor that draws and compresses refrigerant;
a radiator that radiates heat of high-pressure refrigerant discharged from the compressor;
an ejector disposed at a downstream side of the radiator to decompress and expand refrigerant from the radiator, wherein the ejector has a refrigerant suction port for drawing refrigerant by a high-speed refrigerant flow when refrigerant is expanded, mixes the refrigerant drawn from the refrigerant suction port with the high-speed refrigerant flow and decelerates the mixed refrigerant flow to thereby increase pressure of the mixed refrigerant flow;
an evaporator that is arranged in a refrigerant branch passage connected to the refrigerant suction port;
an opening/closing member that opens and closes a refrigerant flow and is capable of preventing refrigerant from flowing into the evaporator; and
a control unit that brings the opening/closing member into a closing state in a time period for which the operation of the compressor is stopped.
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Accused Products
Abstract
In an ejector cycle device having an ejector, an evaporator is arranged in a refrigerant branch passage connected to a refrigerant suction port of the ejector, an opening/closing member for opening and closing a refrigerant passage is disposed to prevent refrigerant from flowing into the evaporator, and a control unit intermittently controls operation of the compressor. In the ejector cycle device, the control unit brings the opening/closing member into a closing state in a time period for which the operation of the compressor is stopped. Accordingly, it can restrict liquid refrigerant from collecting in the evaporator while the compressor is stopped.
83 Citations
53 Claims
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1. An ejector cycle device comprising:
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a compressor that draws and compresses refrigerant;
a radiator that radiates heat of high-pressure refrigerant discharged from the compressor;
an ejector disposed at a downstream side of the radiator to decompress and expand refrigerant from the radiator, wherein the ejector has a refrigerant suction port for drawing refrigerant by a high-speed refrigerant flow when refrigerant is expanded, mixes the refrigerant drawn from the refrigerant suction port with the high-speed refrigerant flow and decelerates the mixed refrigerant flow to thereby increase pressure of the mixed refrigerant flow;
an evaporator that is arranged in a refrigerant branch passage connected to the refrigerant suction port;
an opening/closing member that opens and closes a refrigerant flow and is capable of preventing refrigerant from flowing into the evaporator; and
a control unit that brings the opening/closing member into a closing state in a time period for which the operation of the compressor is stopped. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An ejector cycle device comprising:
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a compressor that draws and compresses refrigerant;
a radiator that radiates heat of high-pressure refrigerant discharged from the compressor;
an ejector that includes a nozzle portion for reducing pressure of refrigerant on a downstream side of the radiator to expand the refrigerant, and draws refrigerant by a jet flow of refrigerant from the nozzle portion;
a first evaporator that evaporates refrigerant to be drawn into a refrigerant suction port of the ejector, so as to have a cooling capacity;
a second evaporator that evaporates refrigerant flowing out of the ejector, so as to have a cooling capacity;
a frost removing member that heats the first and second evaporators so as to perform a frost removing operation where frost adhering to the first and second evaporators is removed;
an evaporator temperature detecting member that detects temperature of at least one of the first evaporator and the second evaporator; and
a control unit that controls the frost removing member to heat the first and second evaporators and to perform the frost removing operation when temperature detected by the evaporator temperature detecting member reaches a predetermined temperature. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 31, 32, 33, 46)
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25. An ejector cycle device comprising:
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a compressor that draws and compresses refrigerant;
a radiator that radiates heat of high-pressure refrigerant discharged from the compressor;
an ejector that includes a nozzle portion for reducing pressure of refrigerant on a downstream side of the radiator to expand the refrigerant, and draws refrigerant by a jet flow of refrigerant from the nozzle portion;
a first evaporator that evaporates refrigerant to be drawn into a refrigerant suction port of the ejector, to have a cooling capacity;
a second evaporator that evaporates refrigerant flowing out of the ejector, to have a cooling capacity;
an accumulator that is arranged on a downstream side of the second evaporator in a refrigerant flow;
a frost removing member that heats the first and second evaporators so as to perform a frost removing operation where frost adhering to the first and second evaporators is removed;
an accumulator temperature detecting member that detects a temperature of the accumulator; and
a control unit that controls the frost removing member to heat the first and second evaporators and to perform the frost removing operation when temperature of an outer wall of the accumulator detected by the accumulator temperature detecting member reaches a predetermined temperature. - View Dependent Claims (26, 27, 28, 29, 30)
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34. An ejector cycle device comprising:
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a compressor that draws and compresses refrigerant;
a radiator that radiates heat of high-pressure refrigerant discharged from the compressor; and
an ejector that includes a nozzle portion for reducing pressure of refrigerant on a downstream side of the radiator to expand the refrigerant, and draws refrigerant by a jet flow of refrigerant from the nozzle portion;
a first evaporator that evaporates refrigerant flowing out of the ejector;
a refrigerant branch passage that is branched from a refrigerant cycle including the compressor, the radiator, the ejector, and the first evaporator, and introduces refrigerant into a refrigerant suction port of the ejector;
a second evaporator that is arranged in the refrigerant branch passage and evaporates refrigerant;
a frost removing member that is disposed to heat the first and second evaporators so as to perform a frost removing operation where frost adhering to the first and second evaporators is removed; and
a control unit that controls the frost removing member to perform the frost removing operation of the first and second evaporators. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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47. An ejector cycle device comprising:
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a compressor that draws and compresses refrigerant;
a radiator that radiates heat of high-pressure refrigerant discharged from the compressor;
an ejector that includes a nozzle portion for reducing pressure of refrigerant on a downstream side of the radiator to expand the refrigerant, and draws refrigerant by a jet flow of refrigerant from the nozzle portion;
a first evaporator that evaporates refrigerant flowing out of the ejector;
a refrigerant branch passage that is branched from a refrigerant cycle including the compressor, the radiator, the ejector, and the first evaporator and introduces refrigerant into a refrigerant suction port of the ejector;
a second evaporator that is arranged in the refrigerant branch passage and evaporates refrigerant;
a heat conductive member that connects the first evaporator and the second evaporator to transfer heat between the first evaporator and the second evaporator; and
a frost removing member that is disposed to heat the first and second evaporators to remove frost adhering to the first and second evaporators. - View Dependent Claims (48, 49, 50, 51, 52, 53)
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Specification