Claims
- 1. A scroll compressor comprising:an orbiting scroll; a non-orbiting scroll meshed with the orbiting scroll; a back-pressure chamber provided at a back side of the orbiting scroll; a communication path communicating the back-pressure chamber with a suction pressure region; a back-pressure control valve for opening and closing the communication path in response to pressure difference between pressure in the back-pressure chamber and suction pressure; a bypass hole communicating a compression chamber, which is formed by said orbiting scroll and said non-orbiting scroll and is not communicated with a discharge port for discharging compressed fluid, with a discharge-pressure chamber communicating with the discharge port; and a bypass valve for opening and closing the bypass hole.
- 2. A scroll compressor according to claim 1, wherein said back-pressure control valve opens said communication path when pressure difference larger than pressure difference between the back-pressure chamber and the suction pressure region set in accordance with operation of said by-pass valve is generated between the pressure of the back-pressure chamber and the suction pressure.
- 3. A scroll compressor according to claim 1, wherein said orbiting scroll and said non-orbiting scroll mesh to form a plurality of compression chambers, wherein a plurality of bypass holes are provided, and wherein each of the compression chambers is communication with one of the bypass holes.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8-264042 |
Oct 1996 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation of application Ser. No. 08/942,737, filed Oct. 3, 1997, U.S. Pat. No. 6,589,035.
US Referenced Citations (9)
Foreign Referenced Citations (7)
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JP |
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Continuations (1)
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Number |
Date |
Country |
Parent |
08/942737 |
Oct 1997 |
US |
Child |
10/419232 |
|
US |