US1495034A - Evaporator - Google Patents

Description

May 20, 1924. 1,495,034

c. ORR

EVAPORATOR,

Filed June 29, 1920 HHS wanna: CAPACITY SUFFIICI'ENT TO HOLD ALL LIQUID REFHIGEHANT uv SYSTEM I Inventor: M CErkO P,

Patented May 20, 1924.

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CLARK one, or roa'r WAYNE, INDIANA, ASSIGNOR 'ro emmaer. anaemic eoanr,

' a conronarron or new are K EVAPORATOR.

Application filed June 29, 1920. Serial No. 892,668.

To all whom, it may concern:

Be it known that I, GLARK ORR, a citizen of the United States, residing at Fort Wayne, county of Allen, State of Indiana, have invented certain new and useful Improvements in Eva orators, of which the following is a speci cation.

This invention relates to evaporators and more particularly to those which are provided with means for separating liquids of different specific gravities. Evaporators of this character may be incorporated in refrigerating systems of that type wherein the refrigerant in gaseous condition is com-- pressed and cooled until it is liquified and then allowed to evaporate. The liquid refrigerant when .it enters the evaporator is often mixed with lubricant from the compressor or other parts of the apparatus and my improved evaporator is adapted to separate the refrigerant from the lubricant and return the lubricant to the circulating system while the liquid refrigerant is re tained in the evaporator as long as it re-' mains a liquid.

Referring to the drawing, Fig. 1 is a section of one form of evaporator embodying my invention; Fig. 2 is a sectional view partly diagrammatic of a refrigerating system emplqfiying a modified form of evaporator; and ig. 3 is a section showing a still further modification.

In the form shown in Fig. 1, my evaporator comprises two dish-shaped members 10 and 11, secured together at their edges and forming an evaporating chamber 12. An inlet p1pe 13 communicates with the evaporatin cured in the top of the member 10 and pipe 15 secured to the bushing 16 at the bottom of the chamber serves as an outlet. Bushing 16 is extended a predetermined distance into the chamber 12. andhas secured thereto by the means of brackets '17 a baflie plate 18.

:When the evaporator is used in a refrigerating system the mixture, of liquid refrigerant and lubricant enters the evaporator through pipe 13, flows over the home plate 18 and collects in the bottom of the chamber 12. The lubricant, being lighter than the refrigerant, rises to the top. and ultimately overflows the bushing 16 and is returned to thecompressor. The space between the bushing 16 and bottom of the chamber through bushing'ld, se-

chamber is so dimensioned that it will hold all of the liquid refrigerant used in the system. The result is therefore that all liquid refrigerantentering the chamber 12 remains therein until entirely evaporated. The baflie plate 18 serves to divert the entering stream of refrigerant from the outlet opening and to spread it over a large surface to facilitate its evaporation. The shape of the evaporating receptacle is such as to form a large cooling surface.

In Fig. 2 the evaporator is composed of a plurality of chambers to provide a still greater cooling surface. The chambers are connected by nipples or bushings 19 which together with the bushing 20 pro'ect some distance above the bottoms. of t e chambers and form a stora e s ace for holding a substantial part of t e 11 uid refrigerant of the system. This provi es a combined storage space of a' capacity equal to the entire volume of liquid refrigerant used in the system. The bafiie plates 18 are supported upon brackets 21 which rest upon the lower dish-shaped members 22. In ig. 2 I have shown the We orator connected with the compressor an condenser 26 of a refrigerating system. While the "evaporator is shown at one side of the compressor and condenser, it will be understood that the same may be located beneath the compressor and condenser such as where for example it may be desired to mount the compressor and condenser over anopening in the top orator 'dlrectly beneath the refrigerating compartment.

The form. shown in Fig. 3 difiers from that shown in Fig. 2 by the addition of collars 23 which are secured to and depend from the bafie plates 18. These collars surround and extend somewhat below the outlet openings and. each is provided at its top with a cut-away portion 24. This form is adapted for use with lubricants which are heavier than the refrigerant. In operation the mixture collects in the lower part of the chambers, the heavier lubricant settling to the bottom and ultimately covering the lower edges of thecollars 23.' As the mixture contmues to collect, the lubricent is forced to rise in the space between the collar and the outlet bushing by the hydrostatic pressure and finally overflows this buehieg'end passes into'the next chamof the refrigerator and the evapnaeaoaa her or into the outlet pipe 15.. The vaporized refrigerant passes out of the chambers through the openings formed by the cut-away portions 24:. By properly proportioning the parts, this form of my invention maybe used in refrigerating systems which employ lubricants either of reater or less specific gravity than the retrigerant. In case a lighter lubricant is used, the openings formed by the cut-away portions 24.- will serve as overflow openings.

It is obvious that the collars 23 may be connected to the outlet bushings instead of to the battle plates or they may serve as a means for supporting the battle plates.

What I claim as new and desire to secure by Letters Patent of the United States, 1s

1. In a refrigerating? system, an evaporator comprising a casing having an inlet opening in the top thereof, an overflow outlet opening through the bottom thereof, and a battle located within said casing between said openings, said casing and outlet opening bemg arranged to form a storage space within said casing beneath said outlet opening for holding a substantial part of the liquid refrigerant of said systom.

2. In a refrigerating system, an evapo rator comprising a easlng formed of dishshaped members secured together at their edges, said casing having an inlet opening in the top thereof, an overflow outlet opening through the bottom" thereof, and a bafie within said casing located between said openings, said casing and outlet opening bemg arranged to form a storage space within said casing beneath said outlet -opening for holding a substantial part of the liquid refrigerant of said system.

3. In a refrigerating system, an evaporator comprising a casing, having an inlet opening, a hollow bushing havin imperforated walls extending through the bottom of said casing and communicating with the interior of said casin at some distance above the bottom thereot storage space for holding a substantial part of the liquid refrigerant of said system and a baflle plate located between said inlet opening and said bushing.

4. In an evaporator, a casing having an inlet at the top thereof, and a tubular outlet member extending through and opening some distance above the bottom thereof, a bafiie plate supported from said casing and extending between said inlet and the opening of said tubular member and a collar secured to said plate, and surrounding and spaced from said tubular member, said collar being also spaced from the bottom of said casing and being provided at its upper end with a cut-away portion.

5. In a refrigerating system, an evaporator provided with an outlet passage extending upwardly into said evaporator and opening some distance above the bottom thereof and forming a storage space for holding a substantial part of the liquid refrigerant of said system, a collar surrounding said passage and having cut away portions communicating with said evaporator at a point above said opening.

In witnesswhereof, I have, hereunto set my hand this 23rd day of June 1920'.

CLARK ORR.

and thereby forming a

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