IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0376365
(2008-01-16)
|
등록번호 |
US-8087260
(2012-01-03)
|
우선권정보 |
JP-2007-009498 (2007-01-18) |
국제출원번호 |
PCT/JP2008/050403
(2008-01-16)
|
§371/§102 date |
20090204
(20090204)
|
국제공개번호 |
WO2008/087958
(2008-07-24)
|
발명자
/ 주소 |
- Ogata, Takeshi
- Hikichi, Takumi
- Okaichi, Atsuo
- Matsui, Masaru
- Hasegawa, Hiroshi
|
출원인 / 주소 |
|
대리인 / 주소 |
Hamre, Schumann, Mueller & Larson, P.C.
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
10 |
초록
▼
A fluid machine (201) includes: a compression mechanism (2) for compressing a working fluid; an expansion mechanism (4) for expanding the working fluid and for recovering mechanical power from the expanding working fluid; a shaft (5) for coupling the compression mechanism (2) and the expansion mecha
A fluid machine (201) includes: a compression mechanism (2) for compressing a working fluid; an expansion mechanism (4) for expanding the working fluid and for recovering mechanical power from the expanding working fluid; a shaft (5) for coupling the compression mechanism (2) and the expansion mechanism (4) and for transferring the mechanical power recovered by the expansion mechanism (4) to the compression mechanism (2); and a closed casing (1) for accommodating the compression mechanism (2), the shaft (5) and the expansion mechanism (4), and having an internal space into which the working fluid that has been compressed by the compression mechanism (2) is discharged. A refrigerant passage space (7) through which a refrigerant to be drawn into the expansion mechanism (4) passes is formed between an expansion chamber of the expansion mechanism (4) and the internal space of the closed casing (1).
대표청구항
▼
1. A fluid machine comprising: a compression mechanism for compressing a working fluid;an expansion mechanism for expanding the working fluid and for recovering mechanical power from the expanding working fluid;a shaft for coupling the compression mechanism and the expansion mechanism and for transf
1. A fluid machine comprising: a compression mechanism for compressing a working fluid;an expansion mechanism for expanding the working fluid and for recovering mechanical power from the expanding working fluid;a shaft for coupling the compression mechanism and the expansion mechanism and for transferring the mechanical power recovered by the expansion mechanism to the compression mechanism; anda closed casing for accommodating the compression mechanism, the shaft and the expansion mechanism, and having an internal space into which the working fluid that has been compressed by the compression mechanism is discharged,wherein the expansion mechanism is a rotary expansion mechanism including: a roller mounted on the shaft; a cylinder in which the roller is disposed; and a suction pipe for guiding the working fluid to be expanded to the expansion mechanism,the cylinder is provided with a through-hole extending in an axis direction of the shaft between an expansion chamber in the cylinder and an outer circumferential surface of the cylinder, the through-hole having a larger flow passage area than that of the suction pipe, andthe suction pipe, the through-hole, and a suction port opening to the expansion chamber are arranged in this order along a flow direction of the working fluid so that the working fluid that has flowed into the through-hole through the suction pipe flows from a first side to a second side of the axis direction and thereafter is drawn into the expansion chamber through the suction port. 2. The fluid machine according to claim 1, wherein a plurality of the through-holes are provided in the cylinder so that the through-holes have a larger flow passage area in total than that of the suction pipe. 3. The fluid machine according to claim 2, wherein the through-holes are provided circumferentially around the expansion chamber. 4. The fluid machine according to claim 2, wherein the expansion mechanism further includes: a branching passage for communicating the suction pipe and the through-holes, and formed on the first side of the axis direction so that the working fluid is guided from the suction pipe to each of the through-holes; and a merging passage for communicating the through-holes and the suction port, and formed on the second side of the axis direction so that the working fluid is merged after flowing through each of the through-holes and drawn from the suction port into the expansion chamber. 5. The fluid machine according to claim 4, wherein the expansion mechanism further includes a first closing member for closing the cylinder on the first side, the first closing member is provided with the branching passage, and the suction pipe is connected to the first closing member so that the working fluid can be supplied to the branching passage. 6. The fluid machine according to claim 5, wherein a part of the first closing member is in contact with the cylinder, the branching passage is constituted of a recessed portion formed in the part, and each of the through-holes faces the recessed portion of the first closing member. 7. The fluid machine according to claim 4, wherein the expansion mechanism further includes a second closing member for closing the cylinder on the second side, and the second closing member is provided with the suction port and the merging passage. 8. The fluid machine according to claim 2, wherein each of the through-holes has a larger flow passage area than that of the suction pipe. 9. A fluid machine comprising: a compression mechanism for compressing a working fluid;an expansion mechanism for expanding the working fluid and for recovering mechanical power from the expanding working fluid;a shaft for coupling the compression mechanism and the expansion mechanism and for transferring the mechanical power recovered by the expansion mechanism to the compression mechanism; anda closed casing for accommodating the compression mechanism, the shaft and the expansion mechanism, and having an internal space into which the working fluid that has been compressed by the compression mechanism is discharged,wherein the expansion mechanism is a rotary expansion mechanism including: a roller mounted on the shaft; a cylinder in which the roller is disposed; and a suction pipe for guiding the working fluid to an expansion chamber formed between the roller and the cylinder,the cylinder is provided with a plurality of through-holes extending in an axis direction of the shaft between the expansion chamber and an outer circumferential surface of the cylinder, andthe expansion mechanism further includes: a branching passage for communicating the suction pipe and the through-holes, and formed on a first side of the axis direction so that the working fluid is guided from the suction pipe to each of the through-holes; and a merging passage for communicating the through-holes and a suction port opening to the expansion chamber, and formed on a second side of the axis direction so that the working fluid is merged after flowing through each of the through-holes and drawn from the suction port into the expansion chamber. 10. A fluid machine comprising: a compression mechanism for compressing a working fluid;an expansion mechanism for expanding the working fluid and for recovering mechanical power from the expanding working fluid;a shaft for coupling the compression mechanism and the expansion mechanism and for transferring the mechanical power recovered by the expansion mechanism to the compression mechanism;a closed casing for accommodating the compression mechanism, the shaft and the expansion mechanism, and having an internal space into which the working fluid that has been compressed by the compression mechanism is discharged; anda jacket disposed around the expansion mechanism, the jacket forming, around the expansion mechanism, a space through which the working fluid to be drawn into the expansion mechanism passes. 11. The fluid machine according to claim 10, wherein: the jacket includes a pipe having an internal space used as the space and wound in spirals around the expansion mechanism in such a manner that adjacent spiral portions of the pipe are in contact with each other; andthe pipe also is used as a suction pipe for guiding the working fluid to be expanded to the expansion mechanism, and one end of the pipe extends outside the closed casing and the other end thereof is connected to the expansion mechanism. 12. The fluid machine according to claim 10, wherein: the expansion mechanism is a rotary expansion mechanism including: a roller mounted on the shaft; a cylinder in which the roller is disposed; and a suction pipe for guiding the working fluid to be expanded to the expansion mechanism; andthe jacket includes a cover member for covering entirely an outer circumferential surface of the cylinder from a first side to a second side in an axis direction of the shaft so that the space is formed between the jacket and the cylinder. 13. A refrigeration cycle apparatus comprising the fluid machine according to claim 1, claim 9, or claim 10.
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