US2553247A - Compressor - Google Patents

Description

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COMPRESSOR Filed Nov; 19, ma 2 sheets-sheet 2 @nvm/Moz 'l ZiZF'azz/Zef patented May 1.5, 1195i UNITED YSTATES ATENT oFFlcE 1 Claim.

This invention relates to the art of refrigeration and more particularly to a compressor for use in small refrigeration plants, such for instance as used in household mechanical refrigerators.

It has for one of its objects a device in which no moving parts are located within the compression chamber, therefore no lubricant is required inside the chamber to coat the walls thereof with a lm of insulation thereby materially reducing the eiciency of the device.

Another object is in the absence of reciprocating parts whereby noise is reduced to a minimum.

Another object is in the few parts comprising the structure, which lend to a reduction in cost of manufacture and assembly and further in the expense of maintenance and operation.

With these and other objects in view, the invention resides in the arrangement and combination of parts hereinafter described and particularly pointed out in the appended claim.

In the drawing:

Fig. 1 is a top plan view of the device.

Fig. 2 is a view in side elevation there being parts in section, the cutting plane of the section being indicated by the line 2-2 of Fig. 1.

Fig. 3 is a view in elevation taken at right angles to and enlarged over the showing in Fig. 2 there being parts broken away and other parts in section, the cutting plane being indicated at 3-3 of Fig. 1.

Referring to the drawings specically by characters of reference the numeral I designates a base on which the component parts of the device are mounted. At 2 is shown a housing for suitable reduction gearing 3, comprising in the present instance a worm 4 mounted on a shaft 5, that receives motion from a motor 6, through a coupling 'I. The worm 4 is in mesh with a gear wheel 8, mounted on a shaft 9. The shaft 9 extends from opposite sides of the housing 2 and has secured to each projecting end an eccentric I0, and the high point of each eccentric being located 180 degrees apart on the shaft 9.

Guide rods II are erected on the base I in pairs, each pair being connected at the top by a cross plate I2, Transverse brace bars I3 are secured, together with the cross plates I2 to the top of the upright rods II by nuts I4. A crosshead I5 is mounted for sliding movement on the guide rods Il. A roller I6 mounted on the under side of the cross head I5, overrides the face of the cam as shown.

The compressor unit I'I is of the bellows or accordion type, constructed of a series of exible metal members hermetically sealed. Thus, even in the expanded position of the compressor unit, there is a high ratio of wall to cubic area. This ratio of course is heightened further during the compressed position of the unit. The bottom of the unit I'I rests on a resilient cushion I8 supported in a socket formed in the crosshead I5. The upper end of the compressor unit bears against the cross member I2 and is provided. with inlet and exhaust ports I9 and 26 respectively. Each port is tted with a check valve, diagrammatically illustrated at 2| and 22.

The cubical area of the compressor chamber H is further reduced by the introduction of a ller member 23 within the chamber, whereby reexpansion of gases on account of heat generated during compression is reduced to a minimum, with the ller member cooperating with thiei bellows wall to increase the above mentioned ra 1o.

Attention is called to the fact that by elongation of the shaft 9 any number of compressor units may be operated from a single source of power application.

What is claimed is:

In a compressor for refrigerating chambers a base; pairs of upstanding parallelguide posts rigidly mounted at opposite sides of said base; fixed plates rigidly secured to the respective pairs, each plate being extended between the upper ends of the guide posts of a pair and being formed with a pair of oppositely check valved openings extending therethrough, said openings respectively comprising an outlet and an inlet for refrigerant gases; spaced crossheads each having end openings through which the guide posts of a pair extend, said crossheads being mounted for up and down sliding movement upon the guide posts; a pair of bellows each flxedly secured at its upper and lower ends respectively to a xed plate and a crosshead, said check valved openings being in ccmmunication with the interior of said bellows; and means for imparting up and down reciproeating movement to said crossheads, said means being adapted to elevate one crosshead simultaneously with lowering of the other crosshead for alternating compression of the respective bellows, thus to provide a substantially continuous flow of compressed refrigerant gases through said outlet openings, said means constituting a motor mounted upon said base; a reducing gear box mounted on the base and REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Number u 438,404

Name Date Meckert Sept. 16, 1884 Kottusch June 13, 1916 Holmes Nov. 21, 1922 -il'rankenield Apr. 13, 1926 Greenwald May 13, 1930 Smith Nov. 19, 1935 FOREIGN PATENTS Country Date "Great Britain 1935

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