IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0110605
(2005-04-20)
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우선권정보 |
JP-2002-140621(2002-05-15) |
발명자
/ 주소 |
- Ogata,Gota
- Takeuchi,Hirotsugu
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
15 |
초록
▼
In an ejector-type depressurizer, a nozzle arrangement converts pressure energy of refrigerant supplied from a radiator into velocity energy to depressurize and expand the refrigerant, and a pressurizer arrangement mixes the refrigerant discharged from the nozzle arrangement with the refrigerant dra
In an ejector-type depressurizer, a nozzle arrangement converts pressure energy of refrigerant supplied from a radiator into velocity energy to depressurize and expand the refrigerant, and a pressurizer arrangement mixes the refrigerant discharged from the nozzle arrangement with the refrigerant drawn from an evaporator and converts the velocity energy of the refrigerant discharged from the nozzle arrangement into pressure energy to increase the pressure of the mixed refrigerant discharged from the pressurizer arrangement. The pressurizer arrangement includes a refrigerant passage that conducts the refrigerant supplied from the nozzle arrangement and the refrigerant supplied from the evaporator, and the refrigerant passage includes a refrigerant passing zone, through which the refrigerant from the nozzle arrangement and the refrigerant from the evaporator mainly pass during operation of the ejector-type depressurizer. A cross sectional size of the refrigerant passing zone of the refrigerant passage is variable.
대표청구항
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What is claimed is: 1. An ejector-type depressurizer for a vapor compression refrigeration system, which includes a compressor that compresses refrigerant of a low pressure space of the vapor compression refrigeration system and thereafter discharges the compressed refrigerant to a high pressure sp
What is claimed is: 1. An ejector-type depressurizer for a vapor compression refrigeration system, which includes a compressor that compresses refrigerant of a low pressure space of the vapor compression refrigeration system and thereafter discharges the compressed refrigerant to a high pressure space of the vapor compression refrigeration system, wherein the ejector-type depressurizer draws refrigerant from an evaporator of the vapor compression refrigeration system while depressurizing the refrigerant of the high pressure space and thereafter supplying the depressurized refrigerant to the low pressure space, the ejector-type depressurizer comprising: a nozzle arrangement that depressurizes and expands the refrigerant of the high pressure space to convert pressure energy of the refrigerant of the high pressure space into velocity energy of a flow of the refrigerant; a passage forming member that forms a passage, which receives the nozzle arrangement, wherein the passage forming member includes: an introducing passage portion that is formed to extend toward an outlet of the nozzle arrangement, wherein the introducing passage portion introduces the refrigerant supplied from the evaporator to merge the introduced refrigerant with the flow of the refrigerant discharged from the nozzle arrangement; and a pressurizing passage portion, which is formed to extend from the outlet of the nozzle arrangement in a refrigerant discharge direction of the nozzle arrangement, wherein the pressurizing passage portion mixes the refrigerant discharged from the nozzle arrangement with the refrigerant introduced through the introducing passage portion to convert the velocity energy of the refrigerant into pressure energy of the refrigerant; and a variable passage member that shifts a relative position of an effective outer wall of the nozzle arrangement with respect to a wall which defines the pressurizing passage portion, the nozzle arrangement being located radially inward of the wall, to change a passage cross sectional area of the pressurizing passage portion. 2. The ejector-type depressurizer according to claim 1, wherein the variable passage member includes an adjustable iris diaphragm means for varying the passage cross sectional area of the pressurizing passage portion. 3. The ejector-type depressurizer according to claim 1, wherein the variable passage member includes an elastic tubular wall, which is made of an elastically deformable material and at least partially defines the pressurizing passage portion. 4. The ejector-type depressurizer according to claim 1, wherein the variable passage member includes: a plurality of concentric tubular walls, which are concentrically arranged in the nozzle arrangement to define a plurality of concentric nozzle passage parts; a plurality of concentric tubular walls, which are concentrically arranged in the pressurizing passage portion to define a plurality of concentric pressurizing passage parts, wherein a center of a cross section of each nozzle passage part at an outlet of the nozzle passage part substantially coincides with a center of a cross section of each pressurizing passage part at an inlet of the pressurizing passage part; and at least one valve, which controls at least a part of flow of the refrigerant supplied to at least one of the plurality of nozzle passage parts. 5. The ejector-type depressurizer according to claim 1, wherein the variable passage member includes a variable mechanism, which varies the passage cross sectional area of the pressurizing passage portion. 6. The ejector-type depressurizer according to claim 5, wherein a cross section of the pressurizing passage portion has one of an ellipsoidal shape and a rectangular shape. 7. The ejector-type depressurizer according to claim 6, wherein: the cross section of the pressurizing passage portion has the ellipsoidal shape; and the variable mechanism includes at least one movable curved wall element and at least one actuator, wherein each of the at least one movable curved wall element has a curved inner surface and is moved by a corresponding one of the at least one actuator in a direction generally perpendicular to an axial direction of the refrigerant passage of the pressurizer arrangement. 8. The ejector-type depressurizer according to claim 7, wherein: the at least one movable curved wall element includes two movable curved wall elements, which are opposed to each other; and the at least one actuator includes two actuators. 9. The ejector-type depressurizer according to claim 6, wherein: the passage cross sectional area of the pressurizing passage portion has the rectangular shape; and the variable mechanism includes at least one movable flat wall element and at least one actuator, wherein each of the at least one movable flat wall element has a generally flat inner surface and is moved by a corresponding one of the at least one actuator in a direction generally perpendicular to an axial direction of the pressurizing passage portion. 10. The ejector-type depressurizer according to claim 9, wherein: the at least one movable flat wall element includes two movable flat wall elements, which are opposed to each other; and the at least one actuator includes two actuators. 11. The ejector-type depressurizer according to claim 1, wherein the variable passage member shifts a radially outer edge of an opening end of the nozzle arrangement in a radial direction. 12. The ejector-type depressurizer according to claim 11, wherein: the variable passage member includes: a plurality of nozzles that are coaxial with one another and include an inner nozzle and an outer nozzle; and a selectable passage member, which selectively supplies high pressure refrigerant to one or more of the plurality of nozzles; the passage forming member includes a plurality of walls, which are coaxial with one another and form first and second pressurizing passages to constitute the pressurizing passage portion; the first pressurizing passage has a relatively small passage cross sectional area, and the second pressurizing passage is arranged radially outward of the first pressurizing passage in a coaxial manner with respect to the first pressurizing passage and has a passage cross sectional area, which is larger than that of the first pressurizing passage; the first pressurizing passage is arranged in such a manner that the first pressurizing passage is functional at time of supplying high pressure refrigerant solely to the inner nozzle; the second pressurizing passage is arranged in such a manner that the second pressurizing passage is nonfunctional at the time of supplying the high pressure refrigerant solely to the inner nozzle and is functional at time of supplying the high pressure refrigerant to the outer nozzle. 13. The ejector-type depressurizer according to claim 11, wherein the variable passage member shifts the radially outer edge of the opening end of the nozzle arrangement between a small size and a large size, wherein the large size is larger than the small size. 14. The ejector-type depressurizer according to claim 11, wherein the variable passage member includes a movable wall member, which defines the pressurizing passage portion and is shiftable in a radial direction. 15. The ejector-type depressurizer according to claim 14, wherein the movable wall member is implemented by an adjustable iris. 16. The ejector-type depressurizer according to claim 14, wherein the movable wall member is implemented by an elastic tubular wall. 17. The ejector-type depressurizer according to claim 16, wherein the movable wall member is a member, which is expandable in the radial direction and is extendable in the radial direction. 18. The ejector-type depressurizer according to claim 14, wherein the movable wall member includes two opposed wall portions, which are opposed to each other and define the pressurizing passage portion. 19. The ejector-type depressurizer according to claim 18, wherein each of the two opposed wall portions includes a curved inner surface.
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