IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0393037
(2006-03-30)
|
등록번호 |
US-7520142
(2009-07-01)
|
우선권정보 |
JP-2005-105992(2005-04-01); JP-2005-195105(2005-07-04); JP-2006-036532(2006-02-14) |
발명자
/ 주소 |
- Saito, Mika
- Takeuchi, Hirotsugu
- Takano, Yoshiaki
- Oshitani, Hiroshi
- Ishizaka, Naohisa
- Ogata, Gota
- Maehara, Takuo
|
출원인 / 주소 |
|
대리인 / 주소 |
Harness, Dickey & Pierce, PLC
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
8 |
초록
▼
An ejector type refrigerating cycle comprises a compressor, a heat radiating device, an ejector, and a first vaporizing device, which are connected in a circuit to form a refrigerating cycle. A bypass passage is provided between an inlet port and a suction port of the ejector, so that a part of the
An ejector type refrigerating cycle comprises a compressor, a heat radiating device, an ejector, and a first vaporizing device, which are connected in a circuit to form a refrigerating cycle. A bypass passage is provided between an inlet port and a suction port of the ejector, so that a part of the refrigerant is bifurcated to flow through the bypass passage. A second vaporizing device is provided in the bypass passage. An internal heat exchanger is further provided between an outlet side of the heat radiating device and the inlet side of the ejector, so that the enthalpy of the high-pressure refrigerant from the heat radiating device is reduced, to thereby increase an enthalpy difference between the inlet side and outlet side of the first and second vaporizing devices. As a result, the cooling capability by the both vaporizing devices can be improved.
대표청구항
▼
What is claimed is: 1. An ejector type refrigerating cycle comprising: a compressor sucking refrigerant and compressing the same; a heat radiating device radiating heat from high-pressure refrigerant pumped out from the compressor; an ejector having a nozzle portion depressurizing and expanding the
What is claimed is: 1. An ejector type refrigerating cycle comprising: a compressor sucking refrigerant and compressing the same; a heat radiating device radiating heat from high-pressure refrigerant pumped out from the compressor; an ejector having a nozzle portion depressurizing and expanding the refrigerant from the heat radiating device, a suction port sucking the refrigerant by high speed refrigerant flow ejected from the nozzle portion, and a pressure increasing portion mixing the high speed refrigerant ejected from the ejector nozzle with the refrigerant sucked from the suction port and increasing fluid pressure of the refrigerant while converting the speed energy of the refrigerant to pressure energy; a first vaporizing device evaporating the refrigerant from the ejector to perform a cooling operation; a first bypass passage bifurcated at a bifurcating point which is located at an inlet side of the ejector supplying a part of the refrigerant from the heat radiating device to the suction port of the ejector so that the refrigerant from the heat radiating device is divided at the bifurcating point into two refrigerant flows which are simultaneously and respectively supplied to the nozzle portion of the ejector and to the first bypass passage; a first restricting device provided in the first bypass passage depressurizing the part of the refrigerant from the heat radiating device; a second vaporizing device provided in the first bypass passage at an outlet side of the first restricting device so that the first restricting device is provided between the bifurcating point and an inlet side of the second vaporizing device evaporating the refrigerant to perform a cooling operation; and an internal heat exchanger carrying out heat exchange between low-pressure refrigerant on an inlet side of the compressor and high-pressure refrigerant on an outlet side of the compressor; wherein the refrigerant from the compressor is supplied via the heat radiating device to a high-pressure side refrigerant passage of the internal heat exchanger, and the refrigerant from the first vaporizing device is exclusively supplied to a low-pressure side refrigerant passage of the internal heat exchanger. 2. An ejector type refrigerating cycle according to claim 1, wherein the high-pressure side refrigerant passage of the internal heat exchanger is arranged in the first bypass passage at an inlet side of the first restricting device. 3. An ejector type refrigerating cycle according to claim 1, further comprising: a gas-liquid separator provided at an outlet side of the first vaporizing device separating the refrigerant into gas phase and liquid phase refrigerants, wherein the low-pressure side refrigerant passage of the internal heat exchanger is arranged at an outlet side of the gas-liquid separator. 4. An ejector type refrigerating cycle according to claim 1, wherein at least one of the high-pressure side and low-pressure side refrigerant passages comprises multiple passage portions, which are respectively arranged in different refrigerant passages of the refrigerating cycle. 5. An ejector type refrigerating cycle according to claim 1, wherein the internal heat exchanger is formed into a double pipe structure having an inside pipe formed in an inside of an outside pipe, the high-pressure side refrigerant passage is formed by one of the passage of the inside pipe and the passage formed between the inside and outside pipes, and the low-pressure side refrigerant passage is formed by the other of the passage of the inside pipe and the passage formed between the inside and outside pipes. 6. An ejector type refrigerating cycle comprising: a compressor sucking refrigerant and compressing the same; a heat radiating device radiating heat from high-pressure refrigerant pumped out from the compressor; an ejector having a nozzle portion depressurizing and expanding the refrigerant from the heat radiating device, a suction port sucking the refrigerant by high speed refrigerant flow ejected from the nozzle portion, and a pressure increasing portion mixing the high speed refrigerant ejected from the ejector nozzle with the refrigerant sucked from the suction port and increasing fluid pressure of the refrigerant while converting the speed energy of the refrigerant to pressure energy; a first vaporizing device evaporating the refrigerant from the ejector to perform a cooling operation; a first bypass passage bifurcated at an inlet side of the ejector supplying a part of the refrigerant from the heat radiating device to the suction port of the ejector; a first restricting device provided in the first bypass passage depressurizing the part of the refrigerant from the heat radiating device; a second vaporizing device provided in the first bypass passage at an outlet side of the first restricting device evaporating the refrigerant to perform a cooling operation; an internal heat exchanger carrying out heat exchange between low-pressure refrigerant on an inlet side of the compressor and high-pressure refrigerant on an outlet side of the compressor; a second bypass passage bifurcated at the inlet side of the ejector supplying a part of the refrigerant from the heat radiating device to the inlet side of the compressor; a second restricting device provided in the second bypass passage depressurizing the part of the refrigerant passing through the second bypass passage; a third vaporizing device provided in the second bypass passage at an outlet side of the second restricting device evaporating the refrigerant to perform a cooling operation. 7. An ejector type refrigerating cycle according to claim 6, wherein a low-pressure side refrigerant passage of the internal heat exchanger is arranged in a refrigerant passage at a downstream side of a link-up point of an outlet side of the first vaporizing device and an outlet side of the third vaporizing device. 8. An ejector type refrigerating cycle according to claim 6, wherein the internal heat exchanger comprises at least first and second heat exchanging devices, a first high-pressure side refrigerant passage is formed in the first heat exchanging device, so that high-pressure refrigerant flowing in the first bypass passage passes through the first high-pressure side refrigerant passage, and a second high-pressure side refrigerant passage is formed in the second heat exchanging device, so that high-pressure refrigerant flowing in the second bypass passage passes through the second high-pressure side refrigerant passage. 9. An ejector type refrigerating cycle comprising: a compressor sucking refrigerant and compressing the same; a heat radiating device radiating heat from high-pressure refrigerant pumped out from the compressor; an expansion valve provided in a refrigerant passage on an outlet side of the heat radiating device controlling condition of low-pressure refrigerant at the inlet side of the compressor by adjusting a passage opening area of the refrigerant passage; an ejector having a nozzle portion depressurizing and expanding the refrigerant from the expansion valve, a suction port sucking the refrigerant by high speed refrigerant flow ejected from the nozzle portion, and a pressure increasing portion mixing the high speed refrigerant ejected from the ejector nozzle with the refrigerant sucked from the suction port and increasing fluid pressure of the refrigerant while converting the speed energy of the refrigerant to pressure energy; a first vaporizing device evaporating the refrigerant from the ejector to perform a cooling operation; a bypass passage bifurcated at a bifurcating point which is located at an inlet side of the ejector supplying a part of the refrigerant from the expansion valve to the suction port of the ejector so that the refrigerant from the expansion valve is divided at the bifurcating point into two refrigerant flows which are simultaneously and respectively supplied to the nozzle portion of the ejector and to the bypass passage; a restricting device provided in the bypass passage depressurizing the part of the refrigerant from the expansion valve; a second vaporizing device provided in the bypass passage at an outlet side of the restricting device so that the restricting device is provided between the bifurcating point and an inlet side of the second vaporizing device evaporating the refrigerant to perform a cooling operation; and an internal heat exchanger carrying out heat exchange between low-pressure refrigerant on the inlet side of the compressor and high-pressure refrigerant on an inlet side of the expansion valve, or between the low-pressure refrigerant on the inlet side of the compressor and intermediate-pressure refrigerant on an outlet side of the expansion valve, the refrigerant from the compressor is supplied, via the heat radiating device or the heat radiating device and the expansion valve, to a high-pressure side refrigerant passage or to an intermediate-pressure refrigerant passage of the internal heat exchanger, and the refrigerant from the first vaporizing device is exclusively supplied to a low-pressure side refrigerant passage of the internal heat exchanger. 10. An ejector type refrigerating cycle according to claim 9, wherein the internal heat exchanger carries out the heat exchange between a high-pressure side refrigerant passage provided at the inlet side of the expansion valve and the low-pressure side refrigerant passage provided at the inlet side of the compressor. 11. An ejector type refrigerating cycle according to claim 9, wherein the internal heat exchanger carries out the heat exchange between an intermediate-pressure side refrigerant passage provided in the bypass passage at the inlet side of the restricting device and the low-pressure side refrigerant passage provided at the inlet side of the compressor. 12. An ejector type refrigerating cycle according to claim 9, wherein the internal heat exchanger carries out the heat exchange between an intermediate-pressure side refrigerant passage provided between the outlet side of the expansion valve and a bifurcating point of the bypass passage and the low-pressure side refrigerant passage provided at the inlet side of the compressor. 13. An ejector type refrigerating cycle according to claim 9, wherein the restricting device is formed by a capillary tube, and the heat exchange of the internal heat exchanger is carried out between the capillary tube and the low-pressure side refrigerant passage on the inlet side of the compressor. 14. An ejector type refrigerating cycle according to claim 9, wherein the expansion valve controls the condition of the low-pressure refrigerant between the outlet side of the first vaporizing device and the low-pressure side refrigerant passage in accordance with temperature and pressure of such refrigerant. 15. An ejector type refrigerating cycle comprising: a compressor sucking refrigerant and compressing the same; a heat radiating device radiating heat from high-pressure refrigerant pumped out from the compressor; an ejector having a nozzle portion depressurizing and expanding the refrigerant from the heat radiating device, a suction port sucking the refrigerant by high speed refrigerant flow ejected from the nozzle portion, and a pressure increasing portion mixing the high speed refrigerant ejected from the ejector nozzle with the refrigerant sucked from the suction port and increasing fluid pressure of the refrigerant while converting the speed energy of the refrigerant to pressure energy; a first vaporizing device evaporating the refrigerant from the ejector to perform a cooling operation; a first bypass passage bifurcated at an inlet side of the ejector supplying a part of the refrigerant from the heat radiating device to the suction port of the ejector; a first restricting device provided in the first bypass passage depressurizing the part of the refrigerant from the heat radiating device; a second vaporizing device provided in the first bypass passage at an outlet side of the first restricting device evaporating the refrigerant to perform a cooling operation; an internal heat exchanger carrying out heat exchange between low-pressure refrigerant on an inlet side of the compressor and high-pressure refrigerant on an outlet side of the compressor; wherein the first and second vaporizing devices are integrally formed into one unit. 16. An ejector type refrigerating cycle comprising: a first refrigerating circuit including; a compressor compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant; a heat radiating device connected to an outlet side of the compressor cooling down the high-pressure refrigerant; an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the heat radiating device, the ejector further having a nozzle portion depressurizing and expanding the refrigerant from the heat radiating device, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy; and a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor; a second refrigerating circuit including; the compressor; the heat radiating device; a bypass passage bifurcated from a bifurcating point which is located at an inlet side of the ejector and connected to the suction port of the ejector so that the refrigerant from the heat radiating device is divided at the bifurcating point into two refrigerant flows which are simultaneously and respectively supplied to the nozzle portion of the ejector and to the bypass passage; a restricting device provided in the bypass passage depressurizing the refrigerant from the heat radiating device; a second vaporizing device provided in the bypass passage so that the restricting device is provided between the bifurcating point and an inlet side of the second vaporizing device; and the first vaporizing device; and an internal heat exchanger having high-pressure side and low-pressure side refrigerant passages, wherein the high-pressure side refrigerant passage is provided between the outlet side of the heat radiating device and the inlet port of the ejector, and/or between the outlet side of the heat radiating device and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor; wherein the refrigerant from the compressor is supplied, via the heat radiating device to the high-pressure side refrigerant passage of the internal heat exchanger, and the refrigerant from the first vaporizing device is exclusively supplied to the low-pressure side refrigerant passage of the internal heat exchanger. 17. An ejector type refrigerating cycle according to claim 16, further comprising: a gas-liquid separator provided at the outlet side of the heat radiating device. 18. An ejector type refrigerating cycle according to claim 16, further comprising: a restricting device provided in the bypass passage at the inlet side of the second vaporizing device. 19. An ejector type refrigerating cycle according to claim 16, further comprising: an accumulator provided between the outlet side of the first vaporizing device and the low-pressure side refrigerant passage of the internal heat exchanger. 20. An ejector type refrigerating cycle according to claim 16, wherein the heat radiating device comprises first and second heat radiating portions, the high-pressure side refrigerant passage of the internal heat exchanger comprises first and second refrigerant passage portions, the first refrigerating circuit is formed by the compressor, the first heat radiating portion, the first refrigerant passage portion of the internal heat exchanger, the second heat radiating portion, the inlet and outlet ports of the ejector, the first vaporizing device, an accumulator, and the low-pressure side refrigerant passage of the internal heat exchanger, and the second refrigerating circuit is formed by the compressor, the first heat radiating portion, the first refrigerant passage portion of the internal heat exchanger, the second heat radiating portion, the second refrigerant passage portion, a restricting device, the second vaporizing device, the suction and outlet ports of the ejector, the first vaporizing device, the accumulator, and the low-pressure side refrigerant passage of the internal heat exchanger. 21. An ejector type refrigerating cycle according to claim 16, further comprising: an expansion device provided between the outlet side of the high-pressure side refrigerant passage of the internal heat exchanger and the inlet port of the ejector, and between the outlet side of the high-pressure side refrigerant passage of the internal heat exchanger and the inlet side of the second vaporizing device. 22. An ejector type refrigerating cycle according to claim 16, wherein the first and second vaporizing devices are integrally formed into one unit. 23. An ejector type refrigerating cycle comprising: a first refrigerating circuit including; a compressor compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant; a heat radiating device connected to an outlet side of the compressor cooling down the high-pressure refrigerant; an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the heat radiating device, the ejector further having a nozzle portion depressurizing and expanding the refrigerant from the heat radiating device, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy; and a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor; a second refrigerating circuit including; the compressor; the heat radiating device; a bypass passage bifurcated from the inlet side of the ejector and connected to the suction port of the ejector; a second vaporizing device provided in the bypass passage; and the first vaporizing device; an internal heat exchanger having high-pressure side and low-pressure side refrigerant passages, wherein the high-pressure side refrigerant passage is provided between the outlet side of the heat radiating device and the inlet port of the ejector, and/or between the outlet side of the heat radiating device and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor; a third refrigerating circuit including; the compressor; the heat radiating device; a second bypass passage bifurcated from the inlet side of the ejector and connected to the outlet side of the first vaporizing device; and a third vaporizing device provided in the second bypass passage. 24. An ejector type refrigerating cycle according to claim 23, further comprising: a restricting device provided in the second bypass passage at the inlet side of the third vaporizing device. 25. An ejector type refrigerating cycle comprising: a first refrigerating circuit including; a compressor compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant; a heat radiating device connected to an outlet side of the compressor cooling down the high-pressure refrigerant; an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the heat radiating device, the ejector further having a nozzle portion depressurizing and expanding the refrigerant from the heat radiating device, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy; and a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor; a second refrigerating circuit including; the compressor; the heat radiating device; a bypass passage bifurcated from the inlet side of the ejector and connected to the suction port of the ejector; a second vaporizing device provided in the bypass passage; and the first vaporizing device; an internal heat exchanger having high-pressure side and low-pressure side refrigerant passages, wherein the high-pressure side refrigerant passage is provided between the outlet side of the heat radiating device and the inlet port of the ejector, and/or between the outlet side of the heat radiating device and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor; wherein the internal heat exchanger comprises first and second heat exchanging portions, the first refrigerating circuit is formed by the compressor, the heat radiating device, the inlet and outlet ports of the ejector, the first vaporizing device, an accumulator, and the low-pressure side refrigerant passage of the first heat exchanging portion, the second refrigerating circuit is formed by the compressor, the heat radiating device, the high-pressure side refrigerant passage of the first heat exchanging portion, a restricting device, the second vaporizing device, the suction and outlet ports of the ejector, the first vaporizing device, the accumulator, and the low-pressure side refrigerant passage of the first heat exchanging portion, and a third refrigerating circuit is formed by the compressor, the heat radiating device, the high-pressure side refrigerant passage of the second heat exchanging portion, a restricting device, a third vaporizing device and the low-pressure side refrigerant passage of the second heat exchanging portion. 26. An ejector type refrigerating cycle comprising: a first refrigerating circuit including; a compressor compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant; a heat radiating device connected to an outlet side of the compressor cooling down the high-pressure refrigerant; an expansion valve arranged at the outlet side of the heat radiating device depressurizing the refrigerant from the heat radiating device; an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the expansion valve, the ejector further having a nozzle portion depressurizing and expanding the refrigerant from the expansion valve, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy; and a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor; a second refrigerating circuit including; the compressor; the heat radiating device; the expansion valve; a bypass passage bifurcated from a bifurcating point which is located at an inlet side of the ejector and connected to the suction port of the ejector so that the refrigerant from the expansion valve is divided at the bifurcating point into two refrigerant flows which are simultaneously and respectively supplied to the nozzle portion of the ejector and to the bypass passage; a restricting device provided in the bypass passage for depressurizing the refrigerant from expansion valve; a second vaporizing device provided in the bypass passage so that the restricting device is provided between the bifurcating point and an inlet side of the second vaporizing device; and the first vaporizing device; and an internal heat exchanger having intermediate-pressure side and low-pressure side refrigerant passages, wherein the intermediate-pressure side refrigerant passage is provided between the outlet side of the expansion valve and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor; wherein the refrigerant from the compressor is supplied via the heat radiating device and the expansion valve to the intermediate-pressure side refrigerant passage of the internal heat exchanger, and the refrigerant from the first vaporizing device is exclusively supplied to the low-pressure side refrigerant passage of the internal heat exchanger. 27. An ejector type refrigerating cycle comprising: a first refrigerating circuit including; a compressor compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant; a heat radiating device connected to an outlet side of the compressor cooling down the high-pressure refrigerant an expansion valve arranged at the outlet side of the heat radiating device depressurizing the refrigerant from the heat radiating device; an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the expansion valve, the ejector further having a nozzle portion depressurizing and expanding the refrigerant from the expansion valve, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy; and a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor; a second refrigerating circuit including; the compressor; the heat radiating device; the expansion valve; a bypass passage bifurcated from a bifurcating point which is located at an inlet side of the ejector and connected to the suction port of the ejector so that the refrigerant from the expansion valve is divided at the bifurcating point into two refrigerant flows which are simultaneously and respectively supplied to the nozzle portion of the ejector and to the bypass passage; a restricting device provided in the bypass passage for depressurizing the refrigerant from the expansion valve; a second vaporizing device provided in the bypass passage; and the first vaporizing device; and an internal heat exchanger having intermediate-pressure side and low-pressure side refrigerant passages, wherein the intermediate-pressure side refrigerant passage is provided between the outlet side of the expansion valve and the bifurcating point, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor; wherein the refrigerant from the compressor is supplied, via the heat radiating device and the expansion valve to the intermediate-pressure side refrigerant passage of the internal heat exchanger, and the refrigerant from the first vaporizing device is exclusively supplied to the low-pressure side refrigerant passage of the internal heat exchanger. 28. An ejector type refrigerating cycle comprising: a first refrigerating circuit including; a compressor compressing gas phase refrigerant and pumping out compressed high-pressure refrigerant; a heat radiating device connected to an outlet side of the compressor cooling down the high-pressure refrigerant; an expansion valve arranged at the outlet side of the heat radiating device depressurizing the refrigerant from the heat radiating device; an ejector having an inlet port, an outlet port and a suction port, in which the inlet port of the ejector is connected to an outlet side of the expansion valve, the ejector further having a nozzle portion depressurizing and expanding the refrigerant from the expansion valve, wherein the outlet port mixes the high speed refrigerant ejected from the nozzle portion with the refrigerant sucked from the suction port and increases fluid pressure of the refrigerant while converting the speed energy of the refrigerant to the pressure energy; and a first vaporizing device connected at its inlet side to the outlet port of the ejector, and at its outlet side to the inlet side of the compressor; a second refrigerating circuit including; the compressor; the heat radiating device; the expansion valve; a bypass passage bifurcated from a bifurcated point which is located at an inlet side of the ejector and connected to the suction port of the ejector so that the refrigerant from the expansion valve is divided at the bifurcating point into two refrigerant flows which are simultaneously and respectively supplied to the nozzle portion of the ejector and to the bypass passage; a restricting device provided in the bypass passage for depressurizing the refrigerant from the expansion valve; a second vaporizing device provided in the bypass passage; and the first vaporizing device; and an internal heat exchanger having intermediate-pressure side and low-pressure side refrigerant passages, wherein the intermediate-pressure side refrigerant passage is provided between the inlet side of the ejector and the inlet side of the second vaporizing device, whereas the low-pressure side refrigerant passage is provided between the outlet side of the first vaporizing device and the inlet side of the compressor; wherein the refrigerant from the compressor is supplied, via the heat radiating device and the expansion valve to the intermediate-pressure side refrigerant passage of the internal heat exchanger; the refrigerant from the first vaporizing device is exclusively supplied to the low-pressure side refrigerant passage of the internal heat exchanger; a capillary tube is provided in the bypass passage, an upstream portion of which forms the intermediate-pressure side refrigerant passage of the internal heat exchanger, and a downstream portion of the capillary tube is formed at an outside of the internal heat exchanger, so that the refrigerant in the downstream portion is not heat exchanged with the refrigerant in the low-pressure side refrigerant passage of the internal heat exchanger.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.