Scroll compressor having bypass valves

Details Scroll compressor having bypass valves Scroll compressor having bypass valves

1996-12-04

1999-01-05

Vrablik, John J.

Rotary expansible chamber devices

With plural working fluid inlet or outlet passages

418 551, F04C 1804, F04C 2908

Patent

active

058554750

ABSTRACT:
A scroll compressor has a check valve assembly for selectively opening and closing a discharge port and allowing a fluid to flow only from the discharge port towards a discharge chamber. A stationary end plate mounted in the scroll compressor has a plurality of bypass holes defined therein at locations symmetrical in terms of pressure. The plurality of bypass holes are open to compression chambers closest to the discharge port and communicate with the discharge chamber. The stationary end plate also has at least one bypass valve for selectively opening and closing the bypass holes and allowing the fluid to flow only from the compression chambers towards the discharge chamber through the bypass holes. The bypass holes are serviceable to prevent an excessive compression and are positioned so as not to be closed by an orbiting scroll wrap immediately after the compression chambers closest to the discharge port have communicated with the discharge port.

REFERENCES:
patent: 4650405 (1987-03-01), Iwanami et al.
patent: 5674058 (1997-10-01), Matsuda et al.

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