Rotary compressor for changing compression capacity
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04C-002/00
F04C-028/18
출원번호
UP-0556428
(2004-04-27)
등록번호
US-7854602
(2011-02-14)
우선권정보
KR-10-2003-0030347(2003-05-13)
국제출원번호
PCT/KR2004/000964
(2004-04-27)
§371/§102 date
20070423
(20070423)
국제공개번호
WO04/102000
(2004-11-25)
발명자
/ 주소
Bae, Ji Young
Roh, Chul Gi
Park, Kyoung Jun
Jang, Chang Yong
Kim, Jong Bong
Ko, Young Hwan
출원인 / 주소
LG Electronics Inc.
대리인 / 주소
Birch, Stewart, Kolasch & Birch, LLP
인용정보
피인용 횟수 :
5인용 특허 :
3
초록▼
A rotary compressor for changing a compression capacity of the compressor includes a driving shaft being rotatable clockwise and counterclockwise, and having an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circum
A rotary compressor for changing a compression capacity of the compressor includes a driving shaft being rotatable clockwise and counterclockwise, and having an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circumference of the eccentric portion so as to contact an inner circumference of the cylinder; a vane installed elastically in the cylinder to contact the roller continuously; a first bearing installed in the cylinder, for rotatably supporting the driving shaft; a second bearing installed in the cylinder, for rotatably supporting the driving shaft and guiding the fluid into the fluid chamber; discharge ports communicating with the fluid chamber; and a valve assembly having openings separated by a predetermined angle from each other, the valve assembly having a center which is eccentrically installed by a predetermined distance from a center of the cylinder.
대표청구항▼
The invention claimed is: 1. A rotary compressor comprising: a driving shaft being rotatable clockwise and counterclockwise, and having an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circumference of the eccent
The invention claimed is: 1. A rotary compressor comprising: a driving shaft being rotatable clockwise and counterclockwise, and having an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circumference of the eccentric portion so as to contact an inner circumference of the cylinder, performing a rolling motion along the inner circumference and forming a fluid chamber to suck and compress fluid along with the inner circumference; a vane installed elastically in the cylinder to contact the roller continuously; a first bearing installed in the cylinder, for rotatably supporting the driving shaft; a second bearing installed in the cylinder, for rotatably supporting the driving shaft and guiding the fluid into the fluid chamber; discharge ports communicating with the fluid chamber; and a valve assembly having openings separated by a predetermined angle from each other, for allowing the openings to selectively introduce the fluid into the fluid chamber through the second bearing at a predetermined position of the fluid chamber according to rotation direction of the driving shaft, the valve assembly having a center which is eccentrically installed by a predetermined distance from a center of the cylinder. 2. The rotary compressor of claim 1, wherein the roller compresses the fluid using the overall fluid chamber only when the driving shaft rotates in any one of the clockwise direction and the counterclockwise direction. 3. The rotary compressor of claim 1, wherein the roller compresses the fluid using a portion of the fluid chamber when the driving shaft rotates in the other of the clockwise direction and the counterclockwise direction. 4. The rotary compressor of claim 1, wherein any one of the openings is positioned inside or outside the fluid chamber according to the rotation direction of the driving shaft. 5. The rotary compressor of claim 4, wherein when any one of the openings is opened according to the rotation direction of the driving shaft to introduce the fluid into the fluid chamber, the opened opening is positioned inside the fluid chamber, and when any one of the openings is closed, the closed opening is positioned outside the fluid chamber so as to prevent the fluid from being stored therein. 6. The rotary compressor of claim 1, wherein the discharge ports comprise a first discharge port and a second discharge port which are positioned facing each other with respect to the vane. 7. The rotary compressor of claim 1, wherein the valve assembly comprises: a first valve installed rotatably between the cylinder and the bearing; and a second valve for guiding a rotary motion of the first valve. 8. The rotary compressor of claim 7, wherein the first valve comprises a disk member contacting the eccentric portion of the driving shaft and rotating in the rotation direction of the driving shaft. 9. The rotary compressor of claim 7, wherein the first valve has a diameter larger than an inner diameter of the cylinder. 10. The rotary compressor of claim 7, wherein the first valve rotates about a rotational center which is axially biased by a predetermined distance from a center of the driving shaft while the driving shaft rotates. 11. The rotary compressor of claim 7, wherein the second bearing comprises suction ports, which communicate with the fluid chamber and are spaced apart by a predetermined angle from each other. 12. The rotary compressor of claim 11, the suction ports comprise: a first suction port located in the vicinity of the vane; and a second suction port spaced apart by a predetermined angle from the first suction port. 13. The rotary compressor of claim 12, wherein the first suction port is positioned spaced by approximately 10° from the vane clockwise or counterclockwise. 14. The rotary compressor of claim 12, wherein the second suction port is positioned in a range of 90-180° from the vane to face the first suction port. 15. The rotary compressor of claim 12, wherein the first valve comprises: a first opening communicating with the first suction port when the driving shaft rotates in any one of the clockwise direction and the counterclockwise direction; and a second opening communicating with the second suction port when the driving shaft rotates in the other of the clockwise direction and the counterclockwise direction. 16. The rotary compressor of claim 15, wherein the second opening is positioned outside the fluid chamber when being positioned at a closed site by the rotation of the driving shaft. 17. The rotary compressor of claim 16, wherein the second opening is positioned outside the fluid chamber when the driving shaft rotates separated from the vane by a predetermined angle when the driving shaft rotates in any one of the clockwise direction and the counterclockwise direction and thereby the first suction port communicates with the first opening. 18. The rotary compressor of claim 15, wherein the first valve further comprises a third opening for opening the third suction port simultaneously when the second suction port is opened. 19. The rotary compressor of claim 15, wherein the first opening opens the third suction port as soon as the second suction port is opened. 20. The rotary compressor of claim 7, wherein the valve assembly further comprises control means for controlling a rotation angle of the first valve such that the corresponding suction ports are precisely opened according to the rotation directions. 21. The rotary compressor of claim 20, wherein the control means comprises: a curved groove formed at the first valve and having a predetermined length; and a stopper formed on the bearing and inserted into the curved groove. 22. The rotary compressor of claim 21, wherein the control means comprises: a projection formed on the first valve and projecting in a radial direction of the first valve; and a groove formed on the second valve, for receiving the projection movably. 23. The rotary compressor of claim 21, wherein the control means comprises: a projection formed on the second valve and projecting in a radial direction of the second valve; and a groove formed on the first valve, for receiving the projection movably. 24. The rotary compressor of claim 21, wherein the control means comprises: a projection formed on the second valve and projecting inwardly in a radial direction of the second valve; and a groove for movably receiving the projection formed in the first valve. 25. The rotary compressor of claim 24, wherein a clearance formed between the projection and the cut-away portion opens the first suction port or the third suction port according to the rotational direction of the driving shaft. 26. The rotary compressor of claim 1, wherein the second bearing comprises suction ports communicating with the fluid chamber and being spaced apart by a predetermined angle from each other. 27. The rotary compressor of claim 26, further comprising a plurality of suction pipes individually connected with the suction ports, for supplying the fluid to be compressed to the cylinder. 28. The rotary compressor of claim 26, further comprising a suction plenum connected with the suction ports, for preliminarily storing fluid to be compressed. 29. The rotary compressor of claim 28, wherein the suction plenum accommodates oil separated from the stored fluid. 30. The rotary compressor of claim 28, wherein the suction plenum is installed at a lower portion of the bearing in the vicinity of the suction port. 31. The rotary compressor of claim 28, wherein the suction plenum has 100-400% a volume as large as the fluid chamber. 32. The rotary compressor of claim 28, wherein the suction plenum is connected with a suction pipe through a predetermined fluid passage, the suction pipe supplying the fluid to be compressed. 33. The rotary compressor of claim 1, wherein the second bearing rotatably supports the driving shaft, and preliminarily stores the fluid to be sucked and then guides the fluid into the fluid chamber. 34. The rotary compressor of claim 33, the second bearing comprises: a body defining a predetermined inner space; and a sleeve for receiving the driving shaft rotatably. 35. The rotary compressor of claim 34, wherein the valve assembly comprises: a first valve installed rotatably between the cylinder and the bearing; and a second valve for guiding a rotary motion of the first valve. 36. The rotary compressor of claim 35, wherein the second bearing has a single opening that is formed on an upper portion of the body and communicates with the openings of the valve assembly. 37. The rotary compressor of claim 35, wherein the first valve comprises a disk member contacting the eccentric portion of the driving shaft and rotating in the rotation direction of the driving shaft. 38. The rotary compressor of claim 35, wherein the first valve has a diameter larger than an inner diameter of the cylinder. 39. The rotary compressor of claim 37, wherein the first valve rotates about a rotational center which is axially biased by a predetermined distance from a center of the driving shaft while the driving shaft rotates. 40. The rotary compressor of claim 35, wherein the first valve comprises: a first opening communicating with the inner space when the driving shaft rotates in any one of the clockwise direction and the counterclockwise direction; and a second opening communicating with the inner space when the driving shaft rotates in the other of the clockwise direction and the counterclockwise direction. 41. The rotary compressor of claim 40, wherein the first opening is positioned in the vicinity of the vane when the driving shaft rotates in any one of the clockwise direction and the counterclockwise direction. 42. The rotary compressor of claim 40, wherein the second opening is positioned spaced apart by a predetermined angle from the vane when the driving shaft rotates in the other of the clockwise direction and the counterclockwise direction. 43. The rotary compressor of claim 40, wherein the second opening is positioned outside the fluid chamber when being positioned at a location closed by the rotation of the driving shaft. 44. The rotary compressor of claim 43, wherein the second opening is positioned outside the fluid chamber when the driving shaft rotates in any one of the clockwise direction and the counterclockwise direction and thereby the first opening is positioned in the vicinity of the vane. 45. The rotary compressor of claim 40, wherein the first and second openings are circular or polygonal. 46. The rotary compressor of claim 40, wherein the first and second openings are cut-away portions. 47. The rotary compressor of claim 40, wherein the first and second openings are rectangles each having a predetermined curvature. 48. The rotary compressor of claim 40, the first valve further comprises a third opening communicating with the second bearing simultaneously with the second opening when the driving shaft rotates in the other of the clockwise direction and the counterclockwise direction. 49. The rotary compressor of claim 48, wherein the third opening is positioned between the second opening and the vane. 50. The rotary compressor of claim 40, wherein the second bearing further comprises a closing portion configured to selectively close the openings according to the rotation direction of the driving shaft. 51. The rotary compressor of claim 50, wherein the closing portion selectively closes a second opening of a first valve of the valve assembly. 52. The rotary compressor of claim 51, wherein the second opening is positioned outside the fluid chamber when being positioned at a location closed by the rotation of the driving shaft. 53. The rotary compressor of claim 52, wherein the second opening is positioned outside the fluid chamber when the driving shaft rotates in any one of the clockwise direction and the counterclockwise direction and thereby the first opening is positioned in the vicinity of the vane. 54. The rotary compressor of claim 50, wherein the closing portion is a rib extending between the body and the sleeve. 55. The rotary compressor of claim 35, wherein the second bearing further comprises a supporting portion for supporting the valve assembly. 56. The rotary compressor of claim 55, wherein the supporting portion is comprised of one end of the sleeve configured to support the valve assembly. 57. The rotary compressor of claim 55, wherein the supporting portion is at least one boss including a coupling hole supporting the valve assembly and for coupling the second bearing to the cylinder. 58. The rotary compressor of claim 57, wherein the bosses are formed on a wall of the body. 59. The rotary compressor of claim 34, wherein the inner space has 100-400% a volume as large as the fluid chamber. 60. The rotary compressor of claim 34, wherein the second bearing accommodates oil separated from the stored fluid. 61. The rotary compressor of claim 34, wherein the second bearing further comprises a suction hole to which the suction pipe for supplying the fluid is connected. 62. The rotary compressor of claim 61, wherein the suction hole is positioned in the vicinity of the vane. 63. The rotary compressor of claim 61, wherein the suction pipe has a coupling (joint) configured to firmly fix the suction pipe to the suction hole around the suction pipe.
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이 특허에 인용된 특허 (3)
Tomayko Edward A. (Cuyler NY) Pandeya Prakash N. (Clay NY), Reversible fixed vane rotary compressor having a reversing disk which carries the suction port.
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