Scroll type compressor with displacement adjusting mechanism

Details Scroll type compressor with displacement adjusting mechanism Scroll type compressor with displacement adjusting mechanism

1982-03-09

1984-08-28

Vrablik, John J.

Pumps

Expansible chamber type

Having separate noncyclic valve

418 55, 137870, 251141, F04B 4902, F04C 1802, F04C 2910

Patent

active

044681780

ABSTRACT:
A scroll type compressor is disclosed. The compressor includes a housing. A fixed scroll is joined to the housing and includes a first end plate from which a first wrap extends. An orbiting scroll also includes second end plate from which a second wrap extends. The wraps interfit at an angular and radial offset to make a plurality of line contacts to define at least one pair of sealed off fluid pockets. The first end plate is formed with at least two holes which are placed at the symmetrical positions. A first of the holes is placed at a location, defined by involute angles, within the area defined by .phi. end >.phi.1>.phi. end-2.pi., where .phi.0 end is the final involute angle of the wrap which extends from the end plate having the holes, and .phi. 1 is the involute angle at which the first hole is placed. The second hole is located at an involute angle approximately .phi.1-.pi.. A control mechanism controls the opening and closing of the holes to thereby control the capacity of compressor.

REFERENCES:
patent: 1859879 (1932-05-01), Longacre
patent: 3386472 (1968-06-01), Szonntagh
patent: 3751001 (1973-08-01), Rayment
patent: 4192152 (1980-03-01), Armstrong et al.
patent: 4216661 (1980-08-01), Tojo et al.
patent: 4357132 (1982-11-01), Kousokabe
patent: 4383805 (1983-05-01), Teegarden et al.

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