US1785576A - Refrigerating mechanism - Google Patents

Description

1930. H. A. BRYSSELBOUT 1,785,576

REFRIGERATING MECHANISM Filed Jan. 18, 1928 QwQmtoc Xevzzd 6 55/55?! 1011f Patented Dec. 16,- 1930 UNITED STATES PATENT, OFFICE HENRI A. BRYSSELBOUT, F DETROIT, MICHIGAN, ASSIGNOR TO COPELAND PRODUCTS,

INC., A CORPORATION 013 MICHIGAN BEFRIGERATING MECHANISM Application filed January 18,

This invention relates to refrigerating apparatus and particularly to an improved con- 'lllVGIlfiOIl and inwhich like struction of 'the heat exchange mechanism thereof, the principal object being the provision of a new and novel form of heat exchange mechanism permitting more rapid transfer of heat to or from the same than in conventional constructions.

Another object is to provide a heat exchange unit for refrigerating mechanisms in which a natural draft or flow of air isinduced to carry heat away from or transfer heat to the same.

'Afurther object is to provide a heat exchan e unit for refrigerating mechanisms in which certain of the refrigerant passages are provided with heat conducting fins arranged in the form of a stack or chimney whereby the transfer of heat to or from the refrigerant passages through the fins to the air will induce a rapid flow of air through the chimney in order to accelerate the transfer of heat between the air and refrigerant passages.

The above being among the objects of the present invention the same consists in certainfeatures of construction and combinations of reference to the accompanying drawing, and then claimed, having the above and other objects inview.

Inv the accompanying drawing which illustrates a suitable embodiment of the present numerals refer to like parts throughout the several views:

Fig. 1 is a vertical sectional view taken through a refrigerator cabinet and illustrating a mechanical refrigerator unit constructed inaccordance with the present invention in connection therewithr ig. 2 is an enlarged perspective view of e evaporator or cooling unit. Fig. 3*is a side view'of one of the stacks and' co-operating tubin of the evaporator unit with certain portlons thereof broken away to better illustrate the construction ofthe same.

Fig.4 is a sectional View taken on theline 4--4OfFig.3.'

Fig. 5 is a modification'of the construction shown in the previous views whereby the parts to be hereinafter described with 1 1928. Serial No. 247,581.

evaporator unit may be supported from a oor.

It has been the conventional practice in the heat exchange device of refrigerating mechanisms to provide fins on the tubes through which the refrigerant is conducted for the urposes of accelerating the transfer of heat etween the refrigerant and the air, or other fluid from which heat is absorbed or to which heat is transferred. These fins have taken various shapes and forms. Some have been extended arounds tubes in helical forma tion, others have horizontal fins through which the various tubes extend in thermal contact therewith, and others have vertically extending fiat plate-like fins. This invent1on particularly deals with the heat transfer units having fins of the latter class and deals with a construction for improving the efficiency of the same by forming them to simulate a stack or chimney whereby in the trans fer of heat a relatively rapid flow of the fluid, to which heat is transferred from the refrigerant or from which heat is transferred to the refrigerant is caused to take place, thereby accelerating such heat transfer.

In'accordance with the present invention I show in the accompanyin drawing a re frigerator cabinet having a bottom wall 10, side walls 11 and a top wall 12. The top wall 12 is provided with an opening 13 of generous cooling element may be removed and is closed by an air tight cover. 14:. ,Within' the cabinet and extending between the back wall 15 and front wall (not shown) are a pair 0 spaced vertically extending partitions or walls 16 which terminate short of the top and bottom of the refrigerator cabinet. The

vdeflector 19 is positioned below the space between the free edges of the deflectors 18 proportions through which the and is spaced therefrom whereby to form passages between the same and the deflectors 18 for the circulation of air. The edges of the deflector 19 may be bent upwardly as shown so that it may serve as a drip trough for the collection of melted frost from the cooling unit.

Supportedon the removable cover 14 is a compressor 21 driven through the belt 22 by the electric motor 23. A condenser 24 of conventional construction is shown connected to the outlet side of the compressor and is adaptedto be cooled by the fan 23' secured to the shaft of the motor. The refrigerant from the .condenser 24 is adapted to be collected in the conventional receiver 25. Supported below the cover 14 by bolts such as 26 is a float valve chamber 27 which may be of conventional construction and which serves to regulate the flow of liquid refrigerant to the cooling or evaporator unit. A tube 28 connects the chamber 27 from a point above the 'normal level of refrigerant therein with the intake side of the compressor, and another tube 29 connects the chamber 27 with the receiver 25. The chamber 27 has secured thereto a plurality of tubes 30 and 31 the interiors of which connect with the interior of the chamber 27 at a point below the normal level of refrigerant therein and extend downwardly therefrom in spaced I each 0t relationship to each other to form a plurality of loops. The loops formed by the tubes 30 are positioned in the same plane and within the-loops formed by the tubes 31, thus formingla series of double loops spaced from er along the length of the chamber 27.

In accordance with the present invention I secure between each pair of double loops 30 and 31 a pair of spaced vertically extending box-like structures or shells 32 having open tops and bottoms and which'constitute the chimneys or. stacks previously referred to. Each stack 32 is soldered or otherwise secured to the tubes 30 and 31 in thermal contact therewith. The vertically extending portions of the tubes 30 and 31 are preferably so spaced from each other in relation to the horizontal dimensions of the stacks 32 that there is an equal distance measured on the surface of the stacks 32 in a horizontal direction between each of the tubes. This permits an equal cooling -or heating effect to be transmitted by all portions of the stacks 32, which are preferably formed of copper or other metal of high heat conducting qualities, to each of the tubes.

It will be noted that when the unit comprising the chamber27, tubes 30 and 31 and stacks 32 is in place it is positioned between the cover 14 and deflectors 18, and between the partitions '16, and is spaced from all of these. When this apparatus is employed as the cooling unit or evaporator as shown and is positioned in a refrigerator cabinet as shown, and the refrigerating mechamsm is functioning in a normal manner, the refrig-.

the stack. By forming the stacks in the manner shown such air is confined to straight vertical movement through theinterior of the stacks which. thereby has the same effect creating a draft as in the stacks used in connection with conventional heating plants except for the reversal of direction of flow. I

have found that by the employment of such stacks the rate of heat ex'chan'e of a given size ofrefrigerating unit may e materially increased over those constructions which employ simple cooling fins'only. This flow of air through the cooling unit as descrloed may be further accelerated by the provision of the partition 16 as shown in the drawings in the refrigerator cabinet which thereby forms a second stack construction with the cabinet.

It will be aparent from the foregoing that the construction disclosed may be employed either in connection with an evaporator as shown or with a condenser, and the effect will be the same in either case. It will also be apparent that the. particular arrangement of the refrigerant carrying tubes in respect to the stacks 32 may be varied to' suit the tastes of the particular designer or manufacturer without materially altering the action of the same, and the spacing of the tubes themselves is relatively immaterial solong as they are in substantial thermal contact withthe stacks.

porting the lower ends of the stacks 32 clear of the floor 35 to allow a free flow of'air under the same.

, It is'obvious that the float type of valve for feeding the refrigerant to tubes may be re-- placed by any other suitable type of automatic feed device and that either a mechanical compressionor absorption type of refrigerating mechanism may be used in conection with 'dicated in Fig. 5 so asto form legs for supthe same,and other f rmal changes may be made in thespecific em odiment of the invention described without. departing from the 'spirit or substance of the broad invention, the

scope of which is commensurate with the appended claims.

What I claim is:

1. -'In combination, a looped refrigerant passage flying in a single plane, a second looped refrigerant passage lyin in a plane parallel to the first mentione plane and within the first mentioned loop, and a box-like structure of heat conducting material having an open top and bottom and having a face secured in thermalcontact with one leg of each of said loops.

2. In a device of the type described, a shell-like structure of heatconducting material having substantially imperforate side walls and-an open top and bottom, and a pair of spaced looped refrigerant carying tubes in thermal contact with said structure, said loops projecting below the lower end of said structure whereby to provide legs for supporting said structure on a horizontal supporting surface without materially restricting the free flow of air through the same.

3. In a device of the ty e described, in combination, a pair of loope refrigerant carrying'tubes positioned in substantially the,

same 'plane and one loop being positioned within the other, a second pair of loops substantially identical to the first" mentioned pair and spaced therefrom, and a tubular sheet metal structure having an open top and bottom positioned between corresponding legs of corresponding loops and in thermal contact with one leg of each loop of both pairs of loops.

4. In a device of the type described, in combination, a pair of looped refrigerant carrying tubes positioned one within the other, a second pair of like tubes spaced from the first mentioned pair, a tubular sheet metal structure having an open top and bottom positioned between said pairs of loops and in thermal contact with one legof each'loop of each pair of loops, and a second similar tubular sheet metal structure positioned between said pairs of loops in spaced relation with respect to the first mentioned structure and in thermal contact with the remaining legs of each loop of said airs of loops.

5. In a device 0 the type described, in combination, a pair of spaced tubular members having an open top and bottom and substantially imperforate side walls, a pair of spaced looped refrigerant tubes secured in thermal contact with said members adjacent faces thereof, a looped refrigerant tube surrounding .each of the first mentioned looped tubes and spaced therefrom, the lower ends of the last mentioned looped tubes being downwardly spaced from the lower edges of said members, and said last mentioned tubes being secured in thermal contact to said members.

6. In combination, a refrigerator cabinet formed to provide a stack-like passage therein, a refrigerant evaporator unit mounted in said stack-like structure, and auxiliary heat

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