Apparatus for changing capacity of multi-stage rotary compressor
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0140906
(2005-06-01)
|
등록번호 |
US-7665973
(2010-04-09)
|
우선권정보 |
KR-10-2004-0088013(2004-11-01); KR-10-2005-0004710(2005-01-18) |
발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
7 |
초록
▼
An apparatus for changing capacity of a multi-stage compressor comprises: a first cylinder provided with a first suction and a first discharge port, and divided into a first suction chamber and a first compression chamber by a first rolling piston which orbits and a first vane which makes a linear m
An apparatus for changing capacity of a multi-stage compressor comprises: a first cylinder provided with a first suction and a first discharge port, and divided into a first suction chamber and a first compression chamber by a first rolling piston which orbits and a first vane which makes a linear movement in contact with the first rolling piston; a second cylinder provided with a second suction port and a second discharge port, and divided into a second suction chamber and a second compression chamber by a second rolling piston which orbits and a second vane which makes a linear movement in contact with the second rolling piston; a middle bearing inserted between the first cylinder and the second cylinder, having a bypass hole to allow communication between the compression chambers of the first cylinder and the second cylinder, and having a valve hole for communication in the middle of the bypass hole; a sliding valve slidingly coupled to the valve hole of the middle bearing, and selectively opening or closing the bypass hole; and a pressure switching unit for selectively supplying discharge pressure to one side of the sliding valve, thereby changing a capacity using all the plural compression units, and obtaining power saving effect suitable for the saving mode.
대표청구항
▼
What is claimed is: 1. An apparatus for changing capacity of a multi-stage compressor, comprising: a first cylinder provided with a first suction port and a first discharge port, wherein the first cylinder has a first inner space formed therein that is divided into a first suction chamber and a fir
What is claimed is: 1. An apparatus for changing capacity of a multi-stage compressor, comprising: a first cylinder provided with a first suction port and a first discharge port, wherein the first cylinder has a first inner space formed therein that is divided into a first suction chamber and a first compression chamber by a first rolling piston that orbits therein and a first vane that moves linearly so as to maintain contact with the first rolling piston; a second cylinder provided with a second suction port and a second discharge port, wherein the second cylinder has a second inner space formed therein that is divided into a second suction chamber and a second compression chamber by a second rolling piston that orbits therein and a second vane that moves linearly so as to maintain contact with the second rolling piston; a middle bearing positioned between the first cylinder and the second cylinder, the middle bearing having a valve hole formed therein and a bypass hole that intersects the valve hole so as to allow communication between the first and second compression chambers; a sliding valve slidably coupled to the valve hole so as to selectively open or close the bypass hole, wherein the sliding valve comprises a hollow cylindrical body having a closed end and an open end; a pressure switching unit that selectively supplies discharge pressure to one end of the sliding valve; a valve stopper provided at an outer end portion of the valve hole, wherein the valve stopper contacts the open end of the sliding valve so as to restrict movement of the sliding valve during an opening operation; an elastic member interposed between the sliding valve and the valve stopper; a stopping protrusion that extends outward from the open end of the sliding valve; and a valve stopping projection formed at an inner circumferential surface of the valve hole, wherein the valve stopping projection contacts the stopping protrusion so as to restrict movement of the sliding valve during a closing operation of the sliding valve, wherein the elastic member is fixed at spring fixing steps respectively formed on inner circumferential surfaces of the sliding valve and the valve stopper, and wherein the elastic member draws the sliding valve toward the valve stopper when pressure at a cylinder side of the sliding valve and a back pressure are balanced so as to open the bypass hole, wherein the elastic member is positioned outside of the flow path of the bypass hole so as to allow refrigerant to flow without resistance. 2. The apparatus of claim 1, wherein a volume of the first inner space of the first cylinder is different from a volume of the second inner space of the second cylinder. 3. The apparatus of claim 1, wherein the first suction port and the second suction port are disposed side by side in a horizontal direction, the first discharge port and the second discharge port are disposed colinearly in a vertical direction, and the first vane and the second vane are disposed side by side in a horizontal direction. 4. The apparatus of claim 1, wherein the bypass hole comprises a plurality of holes. 5. The apparatus of claim 1, wherein the pressure switching unit is formed in plurality. 6. The apparatus of claim 1, wherein the pressure switching unit is a pilot valve. 7. The apparatus of claim 1, wherein a phase difference between the first rolling piston and the second rolling piston is 180 degrees. 8. The apparatus of claim 1, wherein the spring fixing steps are formed in a screw thread shape. 9. The apparatus of claim 1, wherein the pressure switching unit comprises: a first switching valve housing including a high pressure inlet, a low pressure inlet and a common outlet; a switching valve slidably coupled inside the switching valve housing so as to selectively connect the high pressure inlet or the low pressure inlet to the common outlet; an electromagnet installed at one side of the switching valve housing, wherein the electromagnet moves the switching valve using power applied thereto; and a switching spring that restores the switching valve when the power applied to the electromagnet is cut off. 10. The apparatus of claim 9, wherein the pressure switching unit is connected to a high pressure connection pipe connected to a gas discharge pipe to supply high pressure to the high pressure inlet to a low pressure connection pipe connected to a suction pipe to supply low pressure to the low pressure inlet and to a common connection pipe connecting the common outlet to the back side of the sliding valve to supply the high pressure or the low pressure thereto. 11. The apparatus of claim 10, wherein the low pressure connection pipe connects the low pressure inlet to a middle portion of the suction pipe through which a refrigerant is drawn, which is connected to an accumulator that separates gas and liquid in the refrigerant.
이 특허에 인용된 특허 (7)
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Warren Tommy M. (Coweta OK) Brett James F. (Tulsa OK) Winters Warren J. (Tulsa OK), Drilling system and flow control apparatus for downhole drilling motors.
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Newman Wyatt S. (New York NY), Helical spring holder assembly.
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Kloehn Michael F. (20805 Chateau Ave. Yorbalinda CA 92686), Low energy three way valve.
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Kiyokawa Yasunori,JPX ; Saito Jisuke,JPX, Multicylinder rotary compressor.
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Saitou Jisuke (Ashikaga JPX) Kubota Kouichiro (Ota JPX) Sasaki Hidetaka (Oizumi JPX) Kiyokawa Yasunori (Oizumi JPX) Hara Masayuki (Tatebayashi JPX) Aida Makoto (Oizumi JPX), Multiple cylinder rotary compressor.
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Tokairin Masatsugu (Shizuoka JPX), Rotary compressor having a plurality of cylinder chambers partitioned by intermediate partition plate.
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Choi, Jin Kyu; Lee, Seung Kap; Kim, Cheol Woo, Variable capacity rotary compressor.
이 특허를 인용한 특허 (6)
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Byun, Sang-Myung; Lee, Seung-Jun; Lee, Yun-Hi; Choi, Yoon-Sung, 2 stage rotary compressor.
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Santos, Pedro; Pitts, Jeremy; Nelson, Andrew; Santen, Johannes; Walton, John; Westwood, Mitchell; O'Hanley, Harrison, Compressor.
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Santos, Pedro; Pitts, Jeremy; Nelson, Andrew; Santen, Johannes; Walton, John; Westwood, Mitchell; O'Hanley, Harrison, Compressor with liquid injection cooling.
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Santos, Pedro; Pitts, Jeremy; Nelson, Andrew; Santen, Johannes; Walton, John; Westwood, Mitchell; O'Hanley, Harrison, Compressor with liquid injection cooling.
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Santos, Pedro; Pitts, Jeremy; Nelson, Andrew; Santen, Johannes; Walton, John; Westwood, Mitchell; O'Hanley, Harrison, Compressor with liquid injection cooling.
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Byun, Sang-Myung; Kim, Sang-Mo, Rotary compressor with improved connection.
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