Refrigeration compressor having a contoured piston

Details Refrigeration compressor having a contoured piston Refrigeration compressor having a contoured piston

1991-06-06

1992-09-22

Bertsch, Richard A.

Pumps

Expansible chamber type

Having pumping chamber pressure responsive distributor

92181R, F04B 3910

Patent

active

051492547

ABSTRACT:
A small hermetic refrigeration compressor of the single reciprocating piston-type has flat valve plate extending across the open end of the cylinder with a discharge port extending through the valve plate off the center line of the cylinder bore. The piston has a generally flat end face with a recess at least partially in alignment with the discharge port, to allow improved flow of gases to the discharge port with a decreased clearance volume. Further reduction of the clearance volume can be obtained by placing a projecting post on the end face of the piston in line with the discharge port to partially fill the discharge port at top dead center.

REFERENCES:
patent: 1764953 (1930-06-01), Heath
patent: 2626102 (1953-01-01), Garland
patent: 4723896 (1988-02-01), Fritchman

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