IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0977479
(2007-10-25)
|
등록번호 |
US-7823401
(2010-11-22)
|
우선권정보 |
JP-2006-292347(2006-10-27) |
발명자
/ 주소 |
- Takeuchi, Hirotsugu
- Ikegami, Makoto
- Nishijima, Haruyuki
|
출원인 / 주소 |
|
대리인 / 주소 |
Harness, Dickey & Pierce, PLC
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
14 |
초록
▼
In a refrigerant cycle device having an ejector, a branch portion for branching a flow of refrigerant flowing out of the ejector into at least a first refrigerant stream and a second refrigerant stream is located. A first evaporator for evaporating the refrigerant of the first refrigerant stream is
In a refrigerant cycle device having an ejector, a branch portion for branching a flow of refrigerant flowing out of the ejector into at least a first refrigerant stream and a second refrigerant stream is located. A first evaporator for evaporating the refrigerant of the first refrigerant stream is located to allow the refrigerant to flow to a suction side of the compressor, and a second evaporator for evaporating the refrigerant of the second refrigerant stream is located to allow the refrigerant to flow to an upstream side of a refrigerant suction port of the ejector. In addition, the branch portion is located to maintain a dynamic pressure of the refrigerant flowing out of the ejector, and the second evaporator is connected to the branch portion in a range where the dynamic pressure can be applied to an inside of the second evaporator.
대표청구항
▼
What is claimed is: 1. A refrigerant cycle device comprising: a compressor for compressing and discharging refrigerant; a radiator for cooling high-temperature and high-pressure refrigerant discharged from the compressor; an ejector including a nozzle portion for decompressing and expanding the ref
What is claimed is: 1. A refrigerant cycle device comprising: a compressor for compressing and discharging refrigerant; a radiator for cooling high-temperature and high-pressure refrigerant discharged from the compressor; an ejector including a nozzle portion for decompressing and expanding the refrigerant on a downstream side of the radiator, and a refrigerant suction port from which refrigerant is drawn by a refrigerant flow jetted from the nozzle portion at high velocity; a branch portion for branching a flow of the refrigerant flowing out of the ejector into at least a first refrigerant stream and a second refrigerant stream; a first evaporator for evaporating the refrigerant of the first refrigerant stream branched by the branch portion to allow the refrigerant to flow to a suction side of the compressor; a second evaporator for evaporating the refrigerant of the second refrigerant stream branched by the branch portion to allow the refrigerant to flow to an upstream side of the refrigerant suction port, and a refrigerant distribution unit that includes an introduction pipe for allowing the refrigerant to flow thereinto, a first leading pipe for allowing the refrigerant to flow to the first evaporator, and a second leading pipe for allowing the refrigerant to flow to the second evaporator, wherein the branch portion maintains a dynamic pressure of the refrigerant flowing out of the ejector, wherein the branch portion and the second evaporator are connected without a throttling therebetween and the dynamic pressure of the refrigerant flowing out of the elector generally equal to a dynamic pressure of the refrigerant flowing into the second evaporator; wherein the branch portion is located inside of the refrigerant distribution unit, and wherein an inflow direction of the refrigerant in the introduction pipe is substantially the same as an outflow direction of the refrigerant in the second leading pipe. 2. The refrigerant cycle device according to claim 1, wherein the ejector further includes a diffuser portion in which the refrigerant jetted from the nozzle portion and the refrigerant drawn from the refrigerant suction port are mixed and the mixed refrigerant is pressurized, and the branch portion is connected to the ejector and the second evaporator such that the following relationship is satisfied in a target flow amount of refrigerant drawn into the refrigerant suction port: (Ps1−Ps4)+Pv1≧(Ps1−Ps2)+(Ps2−Ps3)+(Ps3−Ps4)+Pv2 wherein Ps1 is a static pressure of the refrigerant at an outlet of the diffuser portion, Pv1 is a dynamic pressure of the refrigerant at the outlet of the diffuser portion, Ps2 is a static pressure of the refrigerant at an inlet of the second evaporator, Pv2 is a dynamic pressure of the refrigerant at the inlet of the second evaporator, Ps3 is a static pressure of the refrigerant at an outlet of the second evaporator, and Ps4 is a static pressure of the refrigerant at the refrigerant suction port. 3. The refrigerant cycle device according to claim 2, wherein the second evaporator includes a plurality of evaporating portions connected in series, the device further comprising a throttle device, for decompressing and expanding the refrigerant, located between the evaporating portions. 4. The refrigerant cycle device according to claim 1, further comprising a refrigerant distribution unit that includes an introduction pipe for allowing the refrigerant to flow thereinto, a first leading pipe for allowing the refrigerant to flow to the first evaporator, and a second leading pipe for allowing the refrigerant to flow to the second evaporator, wherein the branch portion is disposed inside of the refrigerant distribution unit, and wherein an outflow direction of the refrigerant in the first leading pipe and an outflow direction of the refrigerant in the second leading pipe are respectively directed in predetermined directions with respect to an inflow direction of the refrigerant in the introduction pipe, while intersecting at a sharp angle. 5. The refrigerant cycle device according to claim 1, further comprising a flow amount adjustment unit located to adjust a flow amount of the refrigerant flowing into the nozzle portion, wherein the flow amount adjustment unit adjusts the flow amount of the refrigerant flowing into the nozzle portion such that a degree of superheat of the refrigerant on an outlet side of the first evaporator becomes a predetermined value. 6. The refrigerant cycle device according to claim 1, further comprising a flow amount adjustment unit located to adjust a flow amount of the refrigerant flowing into the nozzle portion, wherein the flow amount adjustment unit adjusts the flow amount of the refrigerant flowing into the nozzle portion such that a degree of superheat of the refrigerant on an outlet side of the second evaporator becomes a predetermined value. 7. The refrigerant cycle device according to claim 1, further comprising: a flow amount adjustment unit located to adjust a flow amount of the refrigerant flowing into the nozzle portion; and a pressure detection unit for detecting a pressure of the refrigerant on an inlet side of the second evaporator, wherein the flow amount adjustment unit adjusts the flow amount of the refrigerant flowing to the nozzle portion such that the pressure detected by the pressure detection unit becomes a target pressure. 8. The refrigerant cycle device according to claim 7, further comprising a temperature detection unit for detecting a temperature of the refrigerant on the inlet side of the second evaporator, wherein the target pressure is determined based on the temperature detected by the temperature detection unit. 9. The refrigerant cycle device according to claim 1, further comprising: a flow amount adjustment unit located to adjust a flow amount of the refrigerant flowing into the nozzle portion; and a pressure detection unit for detecting a pressure of the refrigerant on an outlet side of the second evaporator, wherein the flow amount adjustment unit adjusts the flow amount of the refrigerant flowing to the nozzle portion such that the pressure detected by the pressure detection unit becomes a target pressure. 10. The refrigerant cycle device according to claim 1, further comprising: a flow amount adjustment unit located to adjust a flow amount of the refrigerant flowing into the nozzle portion; and a temperature detection unit for detecting a temperature of the refrigerant on an outlet side of the second evaporator, wherein the flow amount adjustment unit adjusts the flow amount of the refrigerant flowing to the nozzle portion such that the temperature detected by the temperature detection unit becomes a target temperature. 11. The refrigerant cycle device according to claim 1, further comprising: a flow amount adjustment unit located to adjust a flow amount of the refrigerant flowing into the nozzle portion; and a pressure detection unit for detecting a pressure of the refrigerant on an upstream side of the flow amount adjustment unit, wherein the flow amount adjustment unit adjusts the flow amount of the refrigerant flowing to the nozzle portion such that the pressure detected by the pressure detection unit becomes a target pressure. 12. The refrigerant cycle device according to claim 1, wherein the introduction pipe, the first leading pipe and the second leading pipe have different diameters. 13. The refrigerant cycle device according to claim 1, wherein the introduction pipe and the second leading pipe of the refrigerant distribution unit are configured to extend approximately in a horizontal direction. 14. The refrigerant cycle device according to claim 1, wherein the branch portion is located within the refrigerant distribution unit at a branch position between the first leading pipe and the second leading pipe. 15. A refrigerant cycle device comprising: a compressor compressing and discharging refrigerant; a radiator cooling high-temperature and high-pressure refrigerant discharged from the compressor; an ejector including a nozzle portion decompressing and expanding the refrigerant on a downstream side of the radiator, and a refrigerant suction port from which refrigerant is drawn by a refrigerant flow jetted from the nozzle portion at high velocity; a branch portion branching a flow of the refrigerant flowing out of the ejector into at least a first refrigerant stream and a second refrigerant stream; a first evaporator evaporating the refrigerant of the first refrigerant stream branched by the branch portion to allow the refrigerant to flow to a suction side of the compressor; and a second evaporator evaporating the refrigerant of the second refrigerant stream branched by the branch portion to allow the refrigerant to flow to an upstream side of the refrigerant suction port, wherein the branch portion maintains a dynamic pressure of the refrigerant flowing out of the ejector, and wherein the dynamic pressure of the refrigerant flowing out of the ejector is generally equal to a dynamic pressure of the refrigerant flowing into the second evaporator.
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