IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0286869
(2008-10-02)
|
등록번호 |
US-8104308
(2012-01-31)
|
우선권정보 |
JP-2007-260038 (2007-10-03) |
발명자
/ 주소 |
- Ikegami, Makoto
- Yamada, Etsuhisa
- Nishijima, Haruyuki
- Oshitani, Hiroshi
- Ozaki, Yukikatsu
|
출원인 / 주소 |
|
대리인 / 주소 |
Harness, Dickey & Pierce, PLC
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
11 |
초록
▼
In a refrigerant cycle device with an ejector, a branch portion is located at an upstream side of a nozzle portion of the ejector so that the refrigerant flowing out of an exterior heat exchanger is branched into first and second streams in a cooling operation mode. A passage switching portion is co
In a refrigerant cycle device with an ejector, a branch portion is located at an upstream side of a nozzle portion of the ejector so that the refrigerant flowing out of an exterior heat exchanger is branched into first and second streams in a cooling operation mode. A passage switching portion is configured such that the refrigerant of the first stream flows through the nozzle portion of the ejector, and the refrigerant of the second stream flows through the decompression unit, the using-side heat exchanger, and the refrigerant suction port of the ejector, in the cooling operation mode. In contrast, the refrigerant discharged from the compressor flows into the nozzle portion after passing through the using-side heat exchanger, and the refrigerant flowing out of the exterior heat exchanger flows into the refrigerant suction port of the ejector, in the heating operation mode.
대표청구항
▼
1. A refrigerant cycle device comprising: a compressor configured to compress and discharge refrigerant;an exterior heat exchanger located outside of a space to be air-conditioned, to perform heat exchange between the refrigerant and outside air;a using-side heat exchanger located to perform heat ex
1. A refrigerant cycle device comprising: a compressor configured to compress and discharge refrigerant;an exterior heat exchanger located outside of a space to be air-conditioned, to perform heat exchange between the refrigerant and outside air;a using-side heat exchanger located to perform heat exchange between the refrigerant and air to be blown into the space;a passage switching portion located to switch a refrigerant flow such that the using-side heat exchanger is operated as a refrigerant evaporator in which the refrigerant is evaporated and the exterior heat exchanger is operated as a refrigerant radiator in which the refrigerant is radiated and cooled in a cooling operation mode for cooling the space, and the using-side heat exchanger is operated as the refrigerant radiator and the exterior heat exchanger is operated as the refrigerant evaporator in a heating operation mode for heating the space;an ejector that includes a nozzle portion configured to decompress the refrigerant, and a refrigerant suction port from which the refrigerant flowing out of the heat exchanger operated as the evaporator is drawn by a high-speed flow of the refrigerant jetted from the nozzle portion in both the cooling operation mode and the heating operation mode;a branch portion configured to branch a flow of the refrigerant flowing out of the heat exchanger operated as the refrigerant radiator into first and second streams in one operation mode of the cooling operation mode and the heating operation mode;a decompression unit located in a refrigerant passage between the branch portion and the heat exchanger operated as the evaporator, to decompress the refrigerant in the one operation mode;a first check valve located in a refrigerant passage through which the refrigerant discharged from the compressor flows into the exterior heat exchanger to allow a flow of the refrigerant from the compressor toward the exterior heat exchanger in the cooling operation mode;a second check valve located in a refrigerant passage between the exterior heat exchanger and the branch portion to allow a flow of the refrigerant from the exterior heat exchanger toward the branch portion;a gas-liquid separator located to separate the refrigerant flowing out of the elector into gas refrigerant and liquid refrigerant and to introduce the separated gas refrigerant to a refrigerant suction side of the compressor; anda third check valve located in a refrigerant passage through which the separated liquid refrigerant is introduced into the exterior heat exchanger to allow a flow of the refrigerant from the gas-liquid separator to the exterior heat exchanger in the heating operation mode; whereinthe passage switching portion is switched to introduce the refrigerant of the first stream branched at the branch portion into the nozzle portion and to introduce the refrigerant of the second stream branched at the branch portion into the refrigerant suction port via the decompression unit and the heat exchanger operated as the evaporator in the one operation mode, and is switched to introduce the refrigerant flowing out of the heat exchanger operated as the radiator into the nozzle portion and to introduce the refrigerant flowing out of the heat exchanger operated as the evaporator into the refrigerant suction port in the other one operation mode of the cooling operation mode and the heating operation mode;the passage switching portion is configured such that the refrigerant discharged from the compressor is introduced into the exterior heat exchanger via the first check valve, the refrigerant flowing out of the exterior heat exchanger is introduced into the branch portion via the second check valve, and the refrigerant flowing out of the using-side heat exchanger is drawn into the refrigerant suction port of the ejector, in the cooling operation mode, andthe passage switching portion is further configured such that the refrigerant discharged from the compressor is introduced into the using-side heat exchanger, the refrigerant introduced into the exterior heat exchanger via the third check valve is drawn into the refrigerant suction port of the ejector, in the heating operation mode. 2. The refrigerant cycle device according to claim 1, further comprising an inner heat exchanger configured to perform a heat exchange between the refrigerant flowing out of the heat exchanger operated as the radiator and the refrigerant to be drawn into the compressor in the one operation mode. 3. The refrigerant cycle device according to claim 1, wherein the one operation mode is the cooling operation mode. 4. The refrigerant cycle device according to claim 1, wherein the ejector is located outside the space. 5. The refrigerant cycle device according to claim 1, wherein the using-side heat exchanger is located at an upper side of the exterior heat exchanger. 6. The refrigerant cycle device according to claim 1, wherein the using-side heat exchanger has a heat-exchanging capacity that is smaller than that of the exterior heat exchanger. 7. A refrigerant cycle device comprising: a compressor configured to compress and discharge refrigerant;an exterior heat exchanger located outside of a space to be air-conditioned, to perform heat exchange between the refrigerant and outside air;a using-side heat exchanger located to perform heat exchange between the refrigerant and air to be blown into the space;a passage switching portion located to switch a refrigerant flow such that the using-side heat exchanger is operated as a refrigerant evaporator in which the refrigerant is evaporated and the exterior heat exchanger is operated as a refrigerant radiator in which the refrigerant is radiated and cooled in a cooling operation mode for cooling the space, and the using-side heat exchanger is operated as the refrigerant radiator and the exterior heat exchanger is operated as the refrigerant evaporator in a heating operation mode for heating the space;an ejector that includes a nozzle portion configured to decompress the refrigerant, and a refrigerant suction port from which the refrigerant flowing out of the heat exchanger operated as the evaporator is drawn by a high-speed flow of the refrigerant jetted from the nozzle portion in both the cooling operation mode and the heating operation mode;a branch portion configured to branch a flow of the refrigerant flowing out of the exterior heat exchanger into first and second streams in the cooling operation mode;a decompression unit located in a refrigerant passage between the branch portion and the using-side heat exchanger to decompress the refrigerant in the cooling operation mode; anda gas-liquid separator located to separate the refrigerant flowing out of the elector into gas refrigerant and liquid refrigerant, whereinthe passage switching portion is configured such that the refrigerant of the first stream flows through the nozzle portion of the ejector, and the refrigerant of the second stream flows through the decompression unit, the using-side heat exchanger, and the refrigerant suction port of the ejector, in the cooling operation mode;the passage switching portion is further configured such that the refrigerant discharged from the compressor flows into the nozzle portion after passing through the using-side heat exchanger, and the refrigerant flowing out of the exterior heat exchanger flows into the refrigerant suction port of the ejector, in the heating operation mode; andthe gas-liquid separator is configured to introduce the separated liquid refrigerant into the exterior heat exchanger in the heating operation mode. 8. A refrigerant cycle device comprising: a compressor configured to compress and discharge refrigerant;an exterior heat exchanger located outside of a space to be air-conditioned, to perform heat exchange between the refrigerant and outside air;a using-side heat exchanger located to perform heat exchange between the refrigerant and air to be blown into the space;a passage switching portion located to switch a refrigerant flow such that the using-side heat exchanger is operated as a refrigerant evaporator in which the refrigerant is evaporated and the exterior heat exchanger is operated as a refrigerant radiator in which the refrigerant is radiated and cooled in a cooling operation mode for cooling the space, and the using-side heat exchanger is operated as the refrigerant radiator and the exterior heat exchanger is operated as the refrigerant evaporator in a heating operation mode for heating the space;an ejector that includes a nozzle portion configured to decompress the refrigerant, and a refrigerant suction port from which the refrigerant flowing out of the heat exchanger operated as the evaporator is drawn by a high-speed flow of the refrigerant jetted from the nozzle portion in both the cooling operation mode and the heating operation mode;a branch portion configured to branch a flow of the refrigerant flowing out of the heat exchanger operated as the refrigerant radiator into first and second streams in one operation mode of the cooling operation mode and the heating operation mode;a decompression unit located in a refrigerant passage between the branch portion and the heat exchanger operated as the evaporator, to decompress the refrigerant in the one operation mode, anda gas-liquid separator located to separate the refrigerant flowing out of the ejector into gas refrigerant and liquid refrigerant, whereinthe passage switching portion is switched to cause the refrigerant discharged from the compressor to be introduced into the exterior heat exchanger, to cause the refrigerant flowing out of the exterior heat exchanger into the branch portion, to introduce the refrigerant of the first stream branched at the branch portion into the nozzle portion and to introduce the refrigerant of the second stream branched at the branch portion into the refrigerant suction port of the ejector via the decompression unit and the heat exchanger operated as the evaporator in the one operation mode; andthe passage switching portion is switched to cause the refrigerant discharged from the compressor to be introduced into the using-side heat exchanger and to cause the refrigerant flowing out of the using-side heat exchanger into the nozzle portion without being branched at the branch portion, and at the same time, to cause the liquid refrigerant separated at the gas-liquid separator to be introduced into the exterior heat exchanger and to cause the refrigerant flowing out of the exterior heat exchanger to the refrigerant suction port of the ejector, in the other one operation mode of the cooling operation mode and the heating operation mode. 9. The refrigerant cycle device according to claim 8, further comprising an inner heat exchanger configured to perform a heat exchange between the refrigerant flowing out of the heat exchanger operated as the radiator and the refrigerant to be drawn into the compressor in the one operation mode. 10. The refrigerant cycle device according to claim 8, wherein the one operation mode is the cooling operation mode. 11. The refrigerant cycle device according to claim 8, wherein the ejector is located outside the space. 12. The refrigerant cycle device according to claim 8, wherein the using-side heat exchanger is located at an upper side of the exterior heat exchanger. 13. The refrigerant cycle device according to claim 8, wherein the using-side heat exchanger has a heat-exchanging capacity that is smaller than that of the exterior heat exchanger.
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