Vapor-compression refrigerant cycle with ejector
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0779571
(2004-02-13)
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우선권정보 |
JP-0036394 (2003-02-14) |
발명자
/ 주소 |
- Makida, Kazuhisa
- Takeuchi, Hirotsugu
- Oshitani, Hiroshi
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
9 |
초록
▼
In a vapor-compression refrigerant cycle having an ejector, a mixture refrigerant of a first refrigerant and a second refrigerant is used. When the mixture refrigerant is decompressed and expanded in a nozzle of the ejector, the first refrigerant has an adiabatic heat drop that is larger than that o
In a vapor-compression refrigerant cycle having an ejector, a mixture refrigerant of a first refrigerant and a second refrigerant is used. When the mixture refrigerant is decompressed and expanded in a nozzle of the ejector, the first refrigerant has an adiabatic heat drop that is larger than that of the second refrigerant. Further, the second refrigerant has an evaporation latent heat that is larger than that of the first refrigerant. In a gas-liquid separator, a gas-phase amount of the first refrigerant is made larger than that of the second refrigerant, and a liquid-phase amount of the second refrigerant is made larger than that of the first refrigerant. For example, the first refrigerant is propane, and the second refrigerant is butane. Accordingly, expansion energy recovered in the nozzle can be effectively converted to pressure energy in a pressure increasing portion of the ejector while cooling capacity of an evaporator can be improved.
대표청구항
▼
1. A vapor-compression refrigerant cycle comprising:a compressor for discharging a high-pressure refrigerant; a radiator for cooling the high-pressure refrigerant discharged from the compressor; an evaporator for evaporating a low-pressure refrigerant after being decompressed; an ejector including a
1. A vapor-compression refrigerant cycle comprising:a compressor for discharging a high-pressure refrigerant; a radiator for cooling the high-pressure refrigerant discharged from the compressor; an evaporator for evaporating a low-pressure refrigerant after being decompressed; an ejector including a nozzle for decompressing and expanding the high-pressure refrigerant flowing from the radiator in iso-entropy, and a pressure increasing portion in which a pressure of refrigerant to be sucked into the compressor is increased by converting expansion energy of the refrigerant to pressure energy thereof while the refrigerant discharged from the nozzle and the refrigerant sucked from the evaporator are mixed; and a gas-liquid separator for separating the refrigerant flowing from the ejector into liquid-phase refrigerant and gas-phase refrigerant, the gas-liquid separator including a gas-phase refrigerant outlet connected to a refrigerant suction side of the compressor and a liquid-phase refrigerant outlet connected to a refrigerant inlet side of the evaporator, wherein: the refrigerant is a mixture refrigerant in which a first refrigerant and a second refrigerant are mixed; when the refrigerant is decompressed and expanded in the nozzle, the first refrigerant has an adiabatic heat drop that is larger than an adiabatic heat drop of the second refrigerant; in the evaporator, the second refrigerant has an evaporation latent heat that is larger than an evaporation latent heat of the first refrigerant; and in the gas-liquid separator, a gas-phase amount of the first refrigerant is made larger than a gas-phase amount of the second refrigerant, and a liquid-phase amount of the second refrigerant is made larger than a liquid phase amount of the first refrigerant. 2. The vapor-compression refrigerant cycle according to claim 1, wherein,at an outlet of the nozzle, the first refrigerant has a gas-liquid density difference that is smaller than a gas-liquid density difference of the second refrigerant. 3. The vapor-compression refrigerant cycle according to claim 1, wherein the first refrigerant is propane, and the second refrigerant is butane.4. The vapor-compression refrigerant cycle according to claim 1, wherein the first refrigerant is hydrocarbon, and the second refrigerant is freon.5. The vapor-compression refrigerant cycle according to claim 1, wherein the evaporator is disposed to cool a medium, the vapor-compression refrigerant cycle further comprisinga heat exchanger disposed for performing a heat exchange between the medium cooled in the evaporator and air to be blown into a compartment. 6. The vapor-compression refrigerant cycle according to claim 5, wherein the mixture refrigerant of the first refrigerant and the second refrigerant is a non-azeotropic refrigerant.7. The vapor-compression refrigerant cycle according to claim 1, wherein first refrigerant and the second refrigerant are mixed in such a manner that the mixture refrigerant is decompressed in the nozzle to have a gas-phase refrigerant and a liquid-phase refrigerant, and flow speeds of the gas-phase refrigerant and the liquid-phase refrigerant discharged from the nozzle are reduced in the pressure increasing portion to an approximate equal degree.8. A vapor-compression refrigerant cycle comprising:a compressor for discharging a high-pressure refrigerant; a radiator for cooling the high-pressure refrigerant discharged from the compressor; an evaporator for evaporating a low-pressure refrigerant after being decompressed; an ejector including a nozzle for decompressing and expanding the high-pressure refrigerant flowing from the radiator in iso-entropy, and a pressure increasing portion in which a pressure of refrigerant to be sucked into the compressor is increased by converting expansion energy of the refrigerant to pressure energy thereof while the refrigerant discharged from the nozzle and the refrigerant sucked from the evaporator are mixed; and a gas-liquid separator for separating the refrigerant flowing from the ejector into liquid-phase refrigerant and gas-phase refrigerant, the gas-liquid separator including a gas-phase refrigerant outlet connected to a refrigerant suction side of the compressor and a liquid-phase refrigerant outlet connected to a refrigerant inlet side of the evaporator, wherein: the refrigerant is a mixture refrigerant in which a first refrigerant and a second refrigerant are mixed; at an outlet of the nozzle, the first refrigerant has a gas-liquid density difference that is smaller than a gas-liquid density difference of the second refrigerant; in the evaporator, the second refrigerant has an evaporation latent heat that is larger than an evaporation latent heat of the first refrigerant; and in the gas-liquid separator, a gas-phase amount of the first refrigerant is made larger than a gas-phase amount of the second refrigerant, and a liquid-phase amount of the second refrigerant is made larger than a liquid phase amount of the first refrigerant.
이 특허에 인용된 특허 (9)
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Okumura Munehiro (Hoya JPX) Nomura Takao (Matsudo JPX) Matsuda Tadashi (Yokohama JPX) Kido Shojiro (Yokohama JPX) Ishii Shinichi (Hachiouji JPX) Hattori Hideki (Tokyo JPX), Aerator and aerobic biological treatment process using same.
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Oshitani, Hiroshi; Takeuchi, Hirotsugu, Air conditioner with ejector cycle system.
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Nishii, Kenichiro, Ejector and refrigerating machine.
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Takeuchi, Hirotsugu, Ejector circuit.
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Hirotsugu Takeuchi JP; Yoshitaka Kume JP; Hiroshi Oshitani JP; Gota Ogata JP, Ejector cycle system.
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Sakai, Takeshi; Nomura, Satoshi; Takeuchi, Hirotsugu, Ejector decompression device with throttle controllable nozzle.
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Hotta, Tadashi; Ozaki, Yukikatsu; Ishikawa, Hiroshi; Takeuchi, Hirotsugu, Ejector for ejector cycle system.
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Sato, Katumi; Aoki, Kazuya; Fukuma, Kazunori; Sugawara, Tatsuya, Fuel supply device for fuel cell.
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Saito, Mika; Takeuchi, Hirotsugu, Gas-liquid separator for ejector cycle.
이 특허를 인용한 특허 (1)
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Ikegami, Makoto; Yamada, Etsuhisa; Nishijima, Haruyuki; Oshitani, Hiroshi; Ozaki, Yukikatsu, Refrigerant cycle device with ejector.
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