# US 5,344,289 A · Deflection system for alien particles in a refrigeration motor compressor

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- Number: US 5,344,289 A
- Document ID: US5344289A
- Status: Granted
- Kind: A
- Application number: 08/073,448
- Filed: 1993-06-08
- Granted: 1994-09-06
- Earliest claimed: 1992-07-03
- Assignees: Necchi Compressori S.r.l.
- Inventors: Antonio Fasce
- Web page: https://patentgrep.com/patent/US5344289A

## CPC

- F04B 39/0072: {characterised by assembly or mounting}
- F04B 39/0055: {with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes}
- Y10S 181/403: Refrigerator compresssor muffler
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A muffler system for a refrigeration motor-compressor comprising an upper and lower case, a compressor formed by a motor and by a body in which a muffler is fixed, a tube fixed to the lower case conveying the refrigerant gas into the cases, an asymmetric side groove provided along the muffler and positioned with regard to the tube, through which the gas arrives in the case, in such a way that the refrigerant gas passes near a farther side of the groove with an angle of incidence causing the alien particles suspended in the gas to rebound far from the muffler and the gas to be kept by the groove side nearer to the tube and an inlet in the groove for conveying the gas to the compressor cylinder.

## Claims

### Claim 1

A muffler system for a refrigeration motor-compressor comprising an upper and lower case, a body mounted within said lower case, a compressor mounted on said body, a motor operatively connected to said compressor, a muffler mounted on said compressor, a tube having a longitudinal axis fixed to said lower case for conveying refrigerant gas into said cases and a V-shaped groove having asymmetrical sides positioned transversely to the longitudinal axis of said tube and along the muffler, one side of said groove closest to said tube being of lesser depth than said side further away from said tube, said side of said groove further away from said tube having an angle of incidence with the longitudinal axis of said tube such that alien particles suspended in the refrigerant flow over said side of said groove of lesser depth to strike the side of said groove of greater depth and upon striking the side of the groove of greater depth causing said particles to rebound away from said muffler, and said groove defining means for conveying refrigerant gas to said compressor.

### Claim 2 (depends on 1)

The muffler according to claim 1, wherein said means comprise an inlet formed at an end of said groove at the apex thereof.

### Claim 3 (depends on 1)

The muffler according to claim 1 wherein said angle of incidence is smaller than 90.degree..