US1540208A - Heat-exchange unit - Google Patents

Description

J. E. ERCANBRACK June 2, 1:91;.

HEAT EXCHANGE UNIT Filed A112. 4, 1923 '2 Sheets-Sheet 1 June 2.- 1925., 1,540, 08-

J. E. ERCANBRACK HEAT nxcnaucs UNIT F lled Auz, 9 3 ts-Shela 1 thereof.

Patented June 2, 1925; I

- uurrso sures PATENT OFFICE.

JOHN EDWARD ERCANFRACK, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-THIRD TO GEORGE F. PAUL AND QNE-THIRD TO RALPH N. HART'WICK, BOTH OF CHICAGO,

ILLINOIS.

HEAT-EXCHANGE UNIT.

application filed August 4, 1923. Seriat N'o. 655,664. To all whom it may concern: pand or contract without strain to the struc- Be it known that I, J oHN EDWARD ERCAN- ture which prevents distortion of the parts. BRACK, a citizenof the United States, and This is quite essential as it will permit, at a resident of Chicago, in the county of any time, of the disassembl of any one or 65 5 Cook and State of Illinois, have invented more of thecylinders ano tubes without certain new and useful-Improvements in a interference with remaining elements. Heat-Exchange Unit, of which the follow I prefer to carry out my invention in subing is a full, clear, and exact description, stantially the manner hereinafter described. such as will enable others skilled in the art and as more particularly pointed out in the 10 to make and use the same. claims, reference being had to theaccom- My invention relates to means for modipanying drawings that form a part of this tying the tem erature of fluids and is more specification. particularly directed to tempering of water In the drawings: and air to raise or lower the temperature Figure 1 represents a vertical side elevation of my heat exchange unit.. One of the objects of my invention is to Fig. 2 is an end view of the structure provide a heat exchange unit, or similar illustrated in Figtre 1. means, in and through which a fluid such as Fig. 3 is a transverse section drawn to steam, hot water, or brine may be circulated, an enlarged scale and taken on line 33 of and the unit is adapted to be'either im- Figure 1.

mersed in a tank of water 01'' positioned Fig. 4 is a top plan of my improved unit within a compartment through which air is showing the same installed in a structure circulated. for heating or tempering air.

In tempering air for use in heating with Fig. 5 is a top plan showing an installa- 25 warm air the structure is usually mounted tion for heating water in a tank.

in a chamber that is interposed in the air Fig. 6 is a vertical sectional view showing flue leading .from a suitable source of supthe use of my heat exchange unit with brine pl and the steam 1s circulated in the for the purpose of cooling water or air.

tu es of the structure, first upon one side In the drawings so far as practicable the 3 and then upon the opposite side of a censame reference characters have been emtral, or a box-like compartment or header ployed to designate like parts wherever to which the tubes are connected and with they occur, and by referrin to Figures 1, the interior of which, said tubes communi- 2, and 3 it will be observe my invention cate. Further objects of my invention repreferably comprises a casing or header conside in providing a structure of this charsisting of exterior side walls 10 of substanacter that is comparatively simple in conti'ally rectangular outline andspaced apart struction and which may be readily assemin parallel relation, which walls are con-. bled or fabricated and placed upon the nected by top and bottom walls 11 and 12 market as a unit. In constructing the unit respectively, and by end walls 13 and 14,

40 I have divided the same into a primary whereby an interior chamber of suitable diand a secondary side so that the fresh steam mensions is formed. Dividing this interior or other tempering fluids flowing through chamber formed as just desc ed is a longithe unit may be readily distributed. Also, tudinally disposed partition15 that is spaced with a primary and secondary side I am from the side walls 10 and extends able to better regulate the temperature of from top to bottom and the respective end the fluid being tempered and change the walls so that the chamber or interior of'the temperature either suddenly or gradually casing is divided into two similar hollow asmay be found most desirable or necessary headers 16 and 17, the former being the in the particular case. In this connection I primaryheader and communicates with a provide a unit in which the cylinders and steam pige 18 through a bored embossment tubes, and other elements, are free to ex-. 19 exten ing above the top Wall 11. Adja having a 30 and its inner end is carried by an ex-. teriorly threaded bushing 31 that is screwed cent its lower end the secondary-header 17 is provided with an outlet or aperture into which is screwed a discharge pipe 20 through which the condensation and other.

fluid may escape or be drawn off whenever desired. Opposite pipe 20 the other wall of the casing is provided with a similar aperturethat is usually closed by aplug 21 but which may be readily removed in the event an additional pipe is to be emplo ed. The end wall 13 is provided with ad itional outlets 22 that are preferably closed by plugs as is seen in Figures 1 and 2 and which may be utilized in the manner hereinafter set forth.

The walls 10 are provided with the plurality of threaded apertures in which bushings 23 and 24: are screwed, which bushings carry the cylinders 25 and 26 respectively. The. cylinders have closed outer ends 27 and 28 while their inner ends are open, as are the bushings at their inner ends, so that they communicate with the interiors of the respective primary and secondary headers 16 and 17 inside the casing. Aligning with the axes'of the threaded apertures that receive the bushings, the partition 15 is also provided with a plurality of threaded apertures extending through the same. Mounted in each cylinder 25 is a tube or pipe 29 belled or flared outer end portion substantially. half-wayintoits respective aperture in partition15 so thatthe tube or pipe 29 is separated or spaced from. the cylinder 25 and preferably free of the latter. A similar tube or pipe 32 is mounted in each of the secondary cylinders 26 and are supported at their inner ends in bushings 33 similar to the aforesaid bushings 31.

The circulation of the tempering fluid, such as steam, is throu h the pipe 18 into the upper portion of t e primary header 16 until said header is filled with the steam which finds egress through the bushings 23 and into the cylinders 25 where it passes to the outer ends of said cylinders, around the flared ends 30 of the inner tubes or pipes 29 and then passes longitudinally through ,said pipes 29 and through the central partition 15 to the opposite tubes or pipes 32 from which it is discharged around the flared ends of the latter into the space be tween said pipesand the respective cylinders 26. The tempering fluid or steam now passes back into the casing and into the secondary header 17 from which it is discharged through suitable outlets such as pipe 20 hereinbefore mentioned.

It is obvious the steam or tempering fluid will condense upon the interior walls of the structure and I have provided shallow gutters 34 and 35 upon the walls 10 within the respective primary and secondary headers,

'cumference thereof. In the event condensaand 37 res and these gutters are each spaced a slight distance above the inwardly extended ends of the bushin 23 and 24 so that the'condensation wil be carried beyond the cir- 7 0 tion should drip upon the bushings I have provided the latter with annular grooves 36 ectively upon their inwardly extended en s so as to permit the condensation to drip free of the ends of the bushings and avoid accumulation thereof within the cylinders and pipes.

In Fig. 4 I have illustrated a practical installation of my heat exchanger or unit in connection with the heating of air for the urpose of warming apartments, rooms or the like. The unit in this installation comprises the casing which I designate as A havin lateral cylinders B upon the primar si e that are shorter in length than 5 the ateral tubes C u n the secondary side. The unit is prefera ly installed within a suitable'housing that is divided longitudinally by a partition wall D so as to provide a feed passageway E in which-the primary side B of the unit is disposed and a discharge passageway F in which the secondary side of the coil is positioned. These passageways communicate through the casing G which may be exhausted by a fan so that the untempered air is drawn in through thepassageway E, past and circulated around the primary cy inders B, and then blown into the passageway F, past and circulated around the secondary c linders C. This arrangement, owing to tie fact that the primary cylinders B are hotter than the secondary cylinders C, will rapidly raise the temperature of the air passing through the primary side of the structure anddischarge 1 the air pastthe secondary c linders C in in their heated condition, in other words, the air is what might be termed pre-heated prior to circulating past the secondary cylinders. 110

In Figure 5 I have disclosed the embodiment of my heat exchange unit in a tank or cistern G, so that the circulation of the heating fluid through the primary and secondary cylinders B and C respectively from the 1 casing A will raise the temperature of the water in which the exchangeunit is emersed or submerged. Thisis found useful in dairy-farms for preventing the freezing of water for the herds and it is also desirable in laundries and other establishments where it is necessary or desirable to modify the temperature of the water from the service pipes rior to being used.

In igure 6 I show the casing A as elongated vertically and disposed within a suitable housing H that is provided with an inlet port J and an outlet port K. The housing is preferably air-tight and waterright so that neither air or water may leak 25 of my invention through the same, and the casing A of the tempering unit is adapted to receive brine or other refrigerating fluid that is circulated through the cylinders B which are arranged in the same manner as in the other installations, that is they are disposed upon each side of the casing to provide aprimary and a secondary section of'the unit. In this connection the water or air is fed into the housing H and is cooled by circulating around and between the cylinders of the unit and is discharged from the housing at a much lower temperature than that at which it enters the same.

It is obvious that a great many other installations could be illustrated, but I have,

' for the purpose of simplicity, shown but three typical embodiments. It will also be obvious that changes may be made in the structure of the tempering cylinders and the casing with which they co-o erate without materially departing from t e principle 'therein disclosed. I therefore desire it understood that refinements or modifications are fully contemplated within the scope of the appended claims.

hat I claim is:

1. A heat exchange unit comprising a hollow casing, a partition dividing the interior thereof into side-by-side headers, a plurality of cylinders extending laterally from opposite walls of said casing and communicating with the interiors of said respective headersand closed at their outer ends, and a plurality of open tubes within the cylinders and extending through said partition and non-communicating with the interiors of the respective headers, said tubes terminating adjacent the outer ends of 40 said cylinders, whereby fluid admitted to one header-is conveyed to the outer end of the adjacent cylinders and is conveyed through the partition to the outer end of an opposite cylinder by the respective tubes 5 and is discharged into the interior of the other header of the casing through the inner end of said opposite cylinder.

2. A heat exchange unit comprising a holg low casing, a partition dividing the interior thereof aligning cylinders mounted upon opposite walls of said casing and communicating with the interiors of the respective'hea'ders, and a tube extending through said partition 5 into said cylinders and terminating adjacent the outer closed ends thereof, whereby fluid from one header is conveyed through the partition by said tube from and to the outer ends of said cylinders. Y

3. A heat exchange unit comprising a hollow casing, a central partition dividing the interior thereof into side-by-side headers, said partition and the adjacent opposite walls of said casing provided with aligning apertures, a plurality of tubes mounted in into side-by-side= headers,- axiallythe c ertures of said partition and carried there of said partition through the respective apertures'ir said casing, and a plurality of cylinders having open ends secured to the respective apertures and surrounding said tubes upon the exterior of said casing, whereby fluid from one header is conveyed to the other header through the partition by the medium of said tubes in conjunction with said cylinders.

4. A heat exchange unit comprising a hollow casing having apertures therein, a plurality of cylinders mounted in aligning apertures, a plurality of tubes extending through said casing and providing passageways from the outer ends of opposite cylinders, and a partition intermediate the sides of the casing for supporting all of said tubes and through which the passageways pass, which partition divides the casmg into opposite side-by-side headers, the construction and arrangementof the partition, tubes and cylinders being such that fluid from one of said headers passes into an adjacent cylinder and is conveyed from its outer end through said partition to the outer end of an aligning cylinder by means of its respective tube and is discharged into the other header through the inner end of said aligning cylinder.

5. In a heat exchange unit a hollow casing having apertures therein, a plurality of cylindrical elements mounted in said apertures and extending externally of said casing, and means upon the interior surface of the walls of said casing for preventing condensation from entering said apertures and cylindrical elements. i

6. In a heat exchange unit a hollow casing having oppositely arranged apertures therein, a plurality of cylinders mounted in opposite apertures and extending exteriorly of said casing, gutters formed upon the interior surface of the walls of said casing about each aperture whereby condensation is prevented from entering said apertures and cylinders, and tubes supported within said casing and projecting into said cylinders.

7. A heat exchange unit comprising a hollow casing having apertures therein, cylindersext-ending from said apertures, a plurality'of tubes extending through said casing and providing passageways from the outer ends of said cylinders, said tubes having their outer ends outwardly flared whereby to restrict the passageways formed between said tubes and cylinders and to prevent condensation from entering said tubes, and common means supporting said tubes through which means passageways extend and which divide positely arranged side-by-side headers.

8. A heat exchange unit comprising a y and extending from opposite sides said easing into opsuitably apertured casing, a plurality of cylinders mounted in opposite apertures, a plurality of tubes extending through said casing and into opposite cylinders to provide passageways from opposite outer ends thereof, means for supporting said tubes within said casing, and a feed pipe leading into said casing, the capacity thereof being equal to the combined capacities of all of said tubes.

Signed at Chicago, county of Cook and State of Illinois, this 28th 'day of July, 1923.

JOHN EDWARD ERCANBRACK.

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