Scroll type compressor with variable displacement mechanism

Details Scroll type compressor with variable displacement mechanism Scroll type compressor with variable displacement mechanism

1990-05-10

1992-12-22

Smith, Leonard E.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417440, 418 551, F04B 4902, F04B 4908

Patent

active

RE0341487

ABSTRACT:
A variable displacement type compressor is disclosed. The compressor includes a housing having fluid inlet and fluid outlet ports. A fixed scroll is fixed within the housing and has a circular end plate from which a first spiral element extends. The end plate of the fixed scroll partitions the inner chamber of the compressor housing into a front chamber connected to the fluid inlet port and a rear chamber. The rear chamber is divided into a discharge chamber connected to the fluid outlet port and an intermediate pressure chamber. The end plate of the fixed scroll has at least two holes which connect the fluid pockets to the intermediate pressure chamber. The end plate also has a communicating channel which connects the front chamber to the intermediate chamber. A control device controls the communication between the front chamber and intermediate pressure chamber. The control device is disposed on the intermediate pressure chamber, and a valve element of the control means is operated by pressure from the discharge chamber.

REFERENCES:
patent: 3759057 (1973-09-01), English
patent: 4459817 (1984-07-01), Inagaki et al.
patent: 4468178 (1984-08-01), Hiraga et al.
patent: 4505651 (1985-03-01), Terauchi et al.
patent: 4557670 (1985-12-01), Inagaki et al.
patent: 4642034 (1987-02-01), Terauchi

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