IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0352000
(2003-01-28)
|
우선권정보 |
KR-0061462 (2002-10-09) |
발명자
/ 주소 |
- Cho, Sung-Hea
- Park, Sung-Yeon
- Jung, Chang-Ho
- Kim, Jong-Goo
|
출원인 / 주소 |
- Samsung Electronics Co., Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
19 인용 특허 :
7 |
초록
▼
A rotary compressor having a plurality of compression chambers and adapted to vary a compression capacity according to a direction of rotation of roller pistons within the compression chambers. A rotating shaft provided with a plurality of eccentric parts drives the roller pistons to compress refrig
A rotary compressor having a plurality of compression chambers and adapted to vary a compression capacity according to a direction of rotation of roller pistons within the compression chambers. A rotating shaft provided with a plurality of eccentric parts drives the roller pistons to compress refrigerant in the compression chambers by eccentric rotations of the eccentric parts. A reversible motor selectively rotates the rotating shaft in opposite directions, and a clutch engages the roller pistons such that the roller pistons perform a compressing action or an idle action according to a rotating direction of the rotating shaft, thus varying the compression capacity of the compressor according to a rotating direction of the rotating shaft. Thus, the compression capacity may be varied without using an inverter circuit.
대표청구항
▼
1. A rotary compressor, comprising:a plurality of cylinders; a rotating shaft provided with a plurality of eccentric parts which are eccentrically rotated in compression chambers defined in the cylinders; a plurality of roller pistons rotationally coupled with the eccentric parts and which compress
1. A rotary compressor, comprising:a plurality of cylinders; a rotating shaft provided with a plurality of eccentric parts which are eccentrically rotated in compression chambers defined in the cylinders; a plurality of roller pistons rotationally coupled with the eccentric parts and which compress refrigerant in the compression chambers; a reversible motor which rotates the shaft in selectively opposite directions; and a clutch which clutches the roller pistons such that the roller pistons perform a compressing action or an idle action according to a rotating direction of the rotating shaft, thus varying a compression capacity of the compressor according to the rotating direction of the rotating shaft. 2. The rotary compressor as set forth in claim 1, wherein the cylinders comprise first and second cylinders arranged at upper and lower positions, respectively, and having different compression capacities, with first and second eccentric parts provided in the first and second cylinders, respectively, and first and second roller pistons provided in the first and second cylinders, respectively.3. The rotary compressor as set forth in claim 2, wherein the clutch comprises:first and second cam bushings having a cylindrical shape and provided between the first eccentric part and the first roller piston and between the second eccentric part and the second roller piston, respectively, and being eccentric in a radial direction; and an eccentricity control unit which controls the first and second cam bushings such that eccentric directions of the first and second cam bushings are equal to or opposite to eccentric directions of the first and second eccentric parts when the rotating direction of the rotating shaft is changed, thus controlling the first and second roller pistons to selectively perform compressing actions thereof. 4. The rotary compressor as set forth in claim 3, wherein the eccentricity control unit comprises:first and second stop pins provided on the rotating shaft to be rotated along with the rotating shaft; and a stopper which limits a slidable rotating range of each of the first and second stop pins with respect to an associated one of the first and second cam bushings within a predetermined angular range when the rotating direction of the rotating shaft is changed. 5. The rotary compressor as set forth in claim 4, wherein:the stopper comprises arc-shaped first and second locking steps, the first locking step being downwardly projected from a lower surface of the first cam bushing and the second locking step being upwardly projected from an upper surface of the second cam bushing; and the first and second stop pins are provided on the rotating shaft in such a way as to be perpendicular to the rotating shaft such that each of the first and second stop pins is stopped at either end of an associated one of the first and second locking steps according to a rotating direction of the rotating shaft. 6. The rotary compressor as set forth in claim 3, wherein the first and second cam bushings engage with each other by toothed parts provided on the first and second cam bushings, such that the first and second cam bushings are rotated together when the rotating shaft is rotated.7. The rotary compressor as set forth in claim 6, wherein the toothed parts comprise:an arc-shaped downward toothed part provided on a lower surface of the first cam bushing; and an arc-shaped upward toothed part provided on an upper surface of the second cam bushing, and engaging with the downward toothed part. 8. The rotary compressor as set forth in claim 7, wherein the eccentricity control unit comprises a stop pin provided on the rotating shaft, the stop pin perpendicularly engaged with the rotating shaft, rotating along with the rotating shaft, and alternatively stopped at first and second ends of the engaged toothed parts, to limit a slidable rotating range of the rotating shaft with respect to the first and second cam bushings within a predetermined angular range.9. The rotary compressor as set forth in claim 3, wherein the first and second cam bushings are connected to each other by a rod assembly comprising at least one rod, such that the first and second cam bushings are rotated together with the rotating shaft.10. The rotary compressor as set forth in claim 9, wherein at least one rod hole is formed on a lower surface of the first cam bushing and on an upper surface of the second cam bushing at a position corresponding to the rod hole formed on the first cam bushing, respectively, and both ends of the rod are inserted into the rod holes formed on the first and second cam bushings so as to connect the first and second cam bushings to each other.11. The rotary compressor as set forth in claim 10, wherein the eccentricity control unit comprises a stop pin provided on the rotating shaft, the stop pin perpendicularly engaged with the rotating shaft, rotating along with the rotating shaft, and alternatively stopped at first and second sides of the rod assembly, to limit a slidable rotating range of the rotating shaft with respect to the first and second cam bushings within a predetermined angular range.12. The rotary compressor as set forth in claim 3, wherein the first and second cam bushings are connected to each other by a cylindrical connecting part such that the first and second cam bushings are rotated together when the rotating shaft is rotated.13. The rotary compressor as set forth in claim 12, wherein the eccentricity control unit comprises:a stop channel circumferentially formed along a part of a sidewall of the cylindrical connecting part; and a stop pin provided on the rotating shaft the stop pin perpendicularly engaged with the rotating shaft, rotating along with the rotating shaft, and alternatively stopped at first and second ends of the stop channel, to limit a slidable rotating range of the rotating shaft with respect to the first and second cam bushings within a predetermined angular range. 14. The rotary compressor as set forth in claim 5, wherein the rotating shaft is provided with a plurality of pin holes and each stop pin is inserted into a respective one of the pin holes.15. The rotary compressor as set forth in 8, wherein the rotating shaft is provided with a pin hole and the stop pin is inserted into the pin hole.16. The rotary compressor as set forth in 11, wherein the rotating shaft is provided with a pin hole and the stop pin is inserted into the pin hole.17. The rotary compressor as set forth in 13, wherein the rotating shaft is provided with a pin hole and the stop pin is inserted into the pin hole.18. The rotary compressor as set forth in claim 14, wherein an internal threaded part is formed on an inner surface of each pin hole and an external threaded part is formed on an outer surface of each stop pin, thus allowing the stop pins to be screwed into the respective ones of the pin holes.19. The rotary compressor as set forth in claim 15, wherein an internal threaded part is formed on an inner surface of the pin hole and an external threaded part is formed on an outer surface of the stop pin, thus allowing the stop pin to be screwed into the pin hole.20. The rotary compressor as set forth in claim 16, wherein an internal threaded part is formed on an inner surface of the pin hole and an external threaded part is formed on an outer surface of the stop pin, thus allowing the stop pin to be screwed into the pin hole.21. The rotary compressor as set forth in claim 17, wherein an internal threaded part is formed on an inner surface of the pin hole and an external threaded part is formed on an outer surface of the stop pin, thus allowing the stop pin to be screwed into the pin hole.22. The rotary compressor as set forth in claim 3, wherein the eccentricity of each of the first and second eccentric parts or each of the first and second cam bushings is determined to allow an associated one of the first and second roller pistons to be eccentrically rotated to a predetermined extent during the idle action of the associated roller piston.23. The rotary compressor as set forth in claim 3, wherein the eccentricity control unit allows each of the first and second roller pistons to eccentrically rotate to a predetermined extent during an idle action of the first or second roller piston.24. The rotary compressor as set forth in claim 16, wherein each of the first and second roller pistons is provided with a relief along respective upper and lower edges of an inner surface of each of the first and second roller pistons.25. The rotary compressor as set forth in claim 17, wherein each of the first and second roller pistons is provided with a relief along respective upper and lower edges of an inner surface of each of the first and second roller pistons.26. The rotary compressor as set forth in claim 24, wherein the reliefs provided along the respective upper and lower edges of the inner surface are symmetrically formed.27. The rotary compressor as set forth in claim 25, wherein the reliefs provided along the respective upper and lower edges of the inner surface are symmetrically formed.28. The rotary compressor as set forth in claim 24, further comprising:a disc-shaped middle plate hermetically separating the first and second cylinders from each other and having a central opening; wherein each of the reliefs has one of a diagonal cross-section and a rectangular multi-stepped cross-section, and each relief is formed so that any point on a horizontal surface of the first or second roller piston, which point is in contact with the disc-shaped middle plate, is not exposed to the central opening of the middle plate when the first or second roller piston is eccentrically rotated by a predetermined extent during an idle action of the first or second roller piston. 29. The rotary compressor as set forth in claim 25, further comprising:a disc-shaped middle plate hermetically separating the first and second cylinders from each other and having a central opening, wherein each of the reliefs has one of a diagonal cross-section and a rectangular multi-stepped cross-section, and each relief is formed so that any point on a horizontal surface of the first or second roller piston, which point is in contact with the disc-shaped middle plate, is not exposed to the central opening of the middle plate when the first or second roller piston is eccentrically rotated by a predetermined extent during an idle action of the first or second roller piston. 30. The rotary compressor as set forth in claim 24 wherein a depth of each relief is determined according to a difference between a centrifugal force and an inertia moment generated in an associated one of the first and second cylinders.31. The rotary compressor as set forth in claim 25, wherein a depth of each relief is determined according to a difference between a centrifugal force and an inertia moment generated in an associated one of the first and second cylinders.32. The rotary compressor as set forth in claim 6, wherein an eccentric direction of the first cam bushing is opposite to an eccentric direction of the second cam bushing within a predetermined angular range.33. The rotary compressor as set forth in claim 9, wherein an eccentric direction of the first cam bushing is opposite to an eccentric direction of the second cam bushing within a predetermined angular range.34. The rotary compressor as set forth in claim 12, wherein an eccentric direction of the first cam bushing is opposite to an eccentric direction of the second cam bushing within a predetermined angular range.35. The rotary compressor as set forth in claim 32, wherein the predetermined angular range is limited within ±30°.36. The rotary compressor as set forth in claim 33, wherein the predetermined angular range is limited within ±30°.37. The rotary compressor as set forth in claim 34, wherein the predetermined angular range is limited within ±30°.38. The rotary compressor as set forth in claim 3, wherein the rotating shaft is provided at a predetermined position under the second eccentric part with a support step so as to upwardly support the second cam bushing and downwardly support a lower flange supporting the rotating shaft.39. The rotary compressor as set forth in claim 3, wherein an inner diameter of each of the first and second cam bushings is equal to or larger than an outer diameter of the rotating shaft, thus allowing the first and second cam bushings to be axially fitted over the rotating shaft connected to the reversible motor when assembling the compressor.40. The rotary compressor as set forth in claim 1, wherein each of the first and second roller pistons is provided with a relief along respective upper and lower edges of an inner surface of each of the first and second roller pistons.41. The rotary compressor as set forth in claim 40, wherein the upper and lower reliefs are symmetrically formed.42. The rotary compressor as set forth in claim 26, wherein each of the reliefs has one a diagonal cross-section and a rectangular multi-stepped cross-section, and each relief is formed so that any point on a horizontal surface of the first or second roller piston, which point is in contact with a disc-shaped middle plate hermetically separating the first and second cylinders from each other, is not exposed to a central opening of the middle plate during an idle action of the first or second roller piston.43. The rotary compressor as set forth in claim 40, wherein a depth of each relief is determined according to a centrifugal force and an inertia moment generated in an associated one of the first and second cylinders.44. The rotary compressor as set forth in claim 3, wherein an outer diameter of the first eccentric part is smaller than or equal to an outer diameter of the second eccentric part, and an inner diameter of the first cam bushing is smaller than or equal to an inner diameter of the second cam bushing.45. The rotary compressor as set forth in claim 3, wherein each of the first and second cam bushings is axially divided into pieces, thus allowing the first and second cam bushings to be inserted and seated into openings of the first and second roller pistons, respectively, when assembling the compressor.46. The rotary compressor as set forth in claim 1, wherein the eccentric parts of the rotating shaft have the same eccentric direction.47. The rotary compressor as set forth in claim 1, wherein respective outer diameters of the eccentric parts are equal.48. The rotary compressor as set forth in claim 2, wherein the first cylinder has a larger compression capacity than a compression capacity of the second cylinder.49. The rotary compressor as set forth in claim 48, wherein a ratio of the compression capacity of the first cylinder to the compression capacity of the second cylinder is 10:4.50. The rotary compressor as set forth in claim 2, wherein a compression capacity of the first cylinder is not equal to a compression capacity of the second cylinder.51. A variable output compressor, comprising:a plurality of compression chambers; a plurality of roller pistons, each roller piston disposed in a respective one of the plurality of compression chambers and adapted to be eccentrically driven; an eccentric drive system which: drives at least one of the plurality of roller pistons to compress a gas at a first compression ratio in one of the plurality of compression chambers, where the at least one of the roller pistons is being driven in a first angular direction; and drives at least one other of the plurality of roller pistons to compress the gas at a second compression ratio in another of the plurality of compression chambers, where the at least one other of the roller pistons is being driven in a second angular direction. 52. The rotary compressor as set forth in claim 51, wherein the eccentric drive system:drives the at least one of the plurality of roller pistons to compress the gas at a third compression ratio in the one of the plurality of compression chambers, where the at least one of the plurality of roller pistons is being driven in the second angular direction; and drives the at least one other of the plurality of roller pistons to compress the gas at a fourth compression ratio in the another of the plurality of compression chambers, where the at least one other of the plurality of roller pistons is being driven in the first angular direction. 53. The rotary compressor as set forth in claim 52, wherein one of the first and third compression ratios is zero.54. The rotary compressor as set forth in claim 52, wherein one of the second and fourth compression ratios is zero.55. The rotary compressor as set forth in claim 51, wherein a ratio of the first compression ratio to the second compression ratio is about 10:4.56. The rotary compressor as set forth in claim 51, wherein a ratio of the first compression ratio to the second compression ratio is about 4:10.57. The rotary compressor as set forth in claim 51, wherein the first and second compression ratios are equal.58. The rotary compressor as set forth in claim 52, wherein the third and fourth compression ratios are equal.59. The rotary compressor as set forth in claim 53, wherein the first and second angular directions are determined by a reversible motor.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.