Scroll compressor
AssigneeHitachi, Ltd.
InventorsIsamu Tsubono, Masahiro Takebayashi, Isao Hayase, Koichi Inaba, Koichi Sekiguchi, Kenichi Oshima, Atsushi Shimada, Takehiro Akizawa
Life of this patent
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Abstract
There is provided a scroll compressor having high overall adiabatic efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to a backside of scroll members to produce an attractive force to attract both scroll members. A control bypass is also provided for communicating compression chambers with a discharge system only when pressure in the compression chambers is high.
Claims2
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.
Dependencies are inferred from the claim text.