US2266291A - Heat exchanger - Google Patents

Description

DC- 16, 1941- VF. M. YONG f 2,266,291

` `HEAT EXCHANGER Filed Jani. 16, 1959 QBY A r roRN/SY Patented Dec. 16, 1941 UNITED STAT OFFICE I .nas'rnxcnANGi-:a

Fred M. Young, Racine, Wis. .Application January 16,-1939, serial No. 251,076 Y `1 claim. (01.257-144) The present application is a' continuation in part of my application Serial No. 735,999, filed Y July 19, 1934.

An object of the present invention is to provide a heat exchanger adapted to occupy the horizontal space in a vertically positioned housing and havingtwo separate cores operatively connected together at one end by a single header,

the other ends each having individual headers,

one being positioned above the horizontal plane of the single header and the Aother `below the horizontal plane of the single header, the upper header of the `pair of Vheaders having an inlet connection and the lower header of the pair of headers having an outlet connection whereby liquid may iiow from the inlet header to the outlet header by gravity.

A further object of the present invention is to provide a connection between the inner ends of the pair of headers adapted to permit independent expansionr and contraction of the separateV banks of tubes but prevent the headers from moving longitudinally or vertically rela-- improved heatA exe core diverge 'from header I4 as clearly indicated in Figures l4 and 5. Headers Il and I1 are on a horizontal line positioned a distance apart vertically` preferably equal to about the width of a header as indicated in Figures 2 and 3.

Headers I6 and I1 are providedwith inlet and outlet openings 20 and 2|, which are positioned preferably at'the outer 'ends ofthe headers. Y i

Thus a heating or cooling liquid or gas may enter at 20, pass through one core, then through header Il and return through the lother core to outlet 2l. The .pathis thusequalized for the passage of the heating orrcooling medium and the cores may expand and contract individually.

'I'hus it will be seen that the heating or coolingv medium or condensate'may drain downwardly `through all of the tubes.

One ofthe novel features headers IB and I1 are tied together by means ofspaced apart ears 22 and 23 and bolt 24.

Thus Vwhile the separate banks of tubes may expand in a direction parallel to the tubes, they will be anchored against individual transverse or verticalmovement by headers I6 and I'I.v The unit therefore will be practically as strong as if headers I 6 andil were'made integral,L

side plates which. are adapted torcooperate with the headers to form a frame.

My improved heat exchanger when completed, K

forms a. strong, compact, unitary'structure which may be easily installed at the Iactoryfcrated and shipped individually to the place of installation and easily installed in the cabinet or air duct.

My device comprises two separate 'banks of Y tubes YI2 and I28L having a multiplicity of closely spaced strip fins I3 and I3* through which the tubes extend forming separate cores. Y

I provide a single header I4, long enough to receive the ends of tubes I2 and I2. This header is preferably provided with a flange I5, with which to attach the end of the unit to the wall of the cabinet.

Each core at the individual headers I6 and other end is provided with I'I. The tubes of each In order to provide protection for the fin edges VI provide -side plates :'25, which are attached to the headersV as at 26, by means of drive screws. 21. The screw openings in these plates are elongated as at 28. Thus after the'cores are completed the plates may be easily attached because provisionV is made for slight variations inthe distance between headers, and further,

after the unit is putin service the oblongholes 28; will Vprovide for slight unequal expansion between the tubes and plates. A

Header I4 may be rigidly ysecured to one wall ofthe duct or cabinet. Headers I8 and I1 areV preferably secured to theopposite wall of the cabinet so they are free to move longitudinally of the tubes.

One of the advantages of my advice is that it may be handled without danger of injuring the tubes before being installed in the cabinet Ybecause the pair of headers is secured together. Otherwise if one should lift one end ot the deviceVK by one of the pair of headers only, the weight of the other header and its tubes might injure the tubes. In this connection, it will be noted that the cores may consist of but a single row of tubes andtherefore they are-not very rigid.

Clearly many minor detail changes may he 5 made without departing from the spuit and scope of my device is that oi the present invention as recited in the pended claim.

Having thus shown and described my invention, I claim:

A device of the class described. comprising an elongated horizontally positioned header, a pair l of headers spaced a distance from and arranged in parallel relation with each other and with said rst header, their inner ends beingy in juxtaposition, said pair of headers having a combined length about equal to said first header, one of said pair of headers being positioned somewhat above and the other somewhat below the horizontal plane of said first header, rows of substantially straight tubes forming operating connections between said nrst and said pair of headers, closely spaced ns through which said tubes extend forming two separate cores whereby the tubes of one core incline downwardly from one o! said headers of said pair of headers to` said rst header and the tubes oi' the other core incline downwardly from said ilrst header to the other of said pair of headers, an inlet connection in the `upper header of said pair oi' headers and an outlet connection in the lower header of said pair of headers whereby a. liquid may 110W by gravity from said inlet to said outlet, said pair of headers having a connection therebetween adapted to permit independent expansion and contraction of said cores but prevent the headers of said pair of headers from moving vertically or longitudinally relative to each other.

FRED M. YOUNG.

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