Noise attenuator of compressor

Details Noise attenuator of compressor Noise attenuator of compressor

1994-04-19

1996-12-17

Dang, Khanh

Pumps

With muffler acting on pump fluid

417902, 181403, F04B 3900

Patent

active

055846742

ABSTRACT:
A noise attenuator for a refrigerant-circulating compressor includes a casing whose interior space is divided into first and second chambers. The first chamber has an inlet for receiving refrigerant and is connected by a conduit with the second chamber. Additional conduits connect the second chamber with the compressor inlet. The cavity length L of the first chamber is determined as a function of a compressor noise to be attenuated, using the formula fr=C/4L (2n+1), where fr is the frequency of the noise, C is the speed of sound in refrigerant, and n is any whole integer (including zero). The first chamber may comprise a first portion and a second portion in the form of a branch line, with the cavity length L being defined by a combination of both of the portions.

REFERENCES:
patent: 3785167 (1974-01-01), Sahs
patent: 4109751 (1978-08-01), Kabele
patent: 4239461 (1980-12-01), Elson
patent: 4313715 (1982-02-01), Richardson, Jr.
patent: 4371054 (1983-02-01), Wirt
patent: 4401418 (1983-08-01), Frichman
patent: 4990067 (1991-02-01), Sasano et al.

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