US2182338A - Heat transfer apparatus - Google Patents

Description

Dec. 5, 1939. E. A. GURLIK 2,182,338

HEAT TRANSFER APPARATUS Filed March 12, 1938 an i a Patented Dec. 5, 1939 UNITED STATES HEAT TRANSFER APPARATUS Edward A. Gurlik, Hamden, Conn, assignor to The G & Manufacturing Company, New Haven, Conn., a corporation of Connecticut Application March 12, 1938 Serial No. 195,576

6 Claims.

This invention relates to heat transfer apparatus, and has more particularly in view improvements in apparatus such as used for heating the interiors of automobiles and the like, where air is heated by causing it to pass over a suitable core through which warm water circulates. The invention is not limited, however, to this particular application. The invention also relates more especially to that class of devices in which a suitable core is interposed between tanks or headers, one of which is so divided or partitioned that the water is caused to pass in one direction through one portion of the core and then in the opposite direction through the remaining portion.

The primary object of the invention is to improve the construction of the heat transfer apparatus so that it is easier to manufacture the parts and to assemble them, and so that the completed radiator or like article can be produced at minimum expense.

In the accompanying drawing:

Fig. 1 is a front elevation, with certain parts omitted, of a heat exchange device embodying my improvements, and such as used in the construction of an automobile heater;

Fig. 2 is a side elevation of the device shown in Fig. 1;

Fig. 3 is an enlarged partial section. on line 3-3 of Fig. 2;

Fig. 4 shows on a still larger scale certain of the parts illustrated in Fig. 3;

Figs. 5 and 6 are sections on lines 5-5 and 6-6, respectively, of Figs. 2 and 1, respectively;

Fig. '7 is a detail perspective view of the parti- 5 tion plate;

Fig. 8 is a detail perspective view of that portion of the header which receives said partition plate; and

Fig. 9 is a transverse sectional view of a header showing a slightly modified partition structure.

In the form of my invention shown in the drawing, a radiator core II] has attached thereto at opposite side edges headers II and I2, respectively. Header I2 is divided or partitioned off in the manner hereinafter more particularly described, so as to create an upper chamber [3 in communication with the contiguous water passages of the core, and the lower chamber l4 cut off from chamber [3 but in communication with the water passages contiguous to chamber M. The result of this arrangement is that, assuming that heated water is introduced into header l2 by way of upper pipe connection l5, such water will traverse the upper portion of the core substantially horizontally, as indicated by the arrows Hi, and pass to header ll within the upper portion thereof, and will then pass to the lower portion of said header, and thence in a horizontal direction, as indicated by the arrows ll, to the lower chamber M of header I2, from which lower 5 chamber the water is carried off by means of'the outlet I8. The air to be heated is caused to flow through the air passages provided in the core in the customary manner.

A preferred construction of the core ID is shown 10 in the Oppe and Curello Patent No. 2,020,957, of November 12, 1935, and in this case there are provided generally horizontal zig-zag water passages it and a plurality of generally horizontally disposed air passages 20 passing through the core 15 from front to rear, the core being made up of a plurality of generally loop-shaped sheet metal units which are assembled side by side, and when so assembled, create between them the intervening passages for the circulation of water. Each 20 unit preferably extends from one header com' pletely to the other and comprises a corrugated sheet metal strip disposed generally in the form of a loop and having its ends suitably interconnected. In Fig. 40f the drawing are shown three 25 of such units, and it will be noted that they are all of identical structure, but have their end joints 2i arranged in alternating or staggered relation. Therefore, as regards the portion of the core adjacent header l2, it will be seen that some of the 30 units present adjacent the core their joints 2i, while the alternate ones present flat, wide closed end portions 22, as Shown more particularly in Fig. 4.

The division of the header l2 into separate 35 upper andlower chambers is accomplished by providing in said header a partition 23, and it will be noted that this partition is opposite one of the flat radiator unit portions 22, and is provided with a flange 3 abutted and held against the portion 4 22, as shown more particularly in Fig. 4. s

The header i2 preferably comprises a stamping of elongated rectangular shape presenting a channeledportion or chamber having an open topbut a closed bottom, sides andends, the top 5 or open portion being abutted against the core T in the manner shown in Figs. 1 and 3. It will be observed that a rim or flange 24 extends continuously about the mouth portion of the header, and by means of this rim portion the header is 5 soldered to the adjacent end portion of the,core in a manner well understood in the art. The flange portion 23 of partition 23 is adapted to lie flush with this rim 24 and to have end tabs 23 on the partition flange extend across the rim in 55 metal, and it is provided at the respective ends of its body portion with rather short and wide tongues 23, which are adapted to engage by a snap action and interlock with grooved portions 25 in the sides of the header. The arrangement is such that the partition 23 is pushed into its-assembled position in the header and inter locked with the header as a result of the inherent resiliency of the header and partition, which are both made of sheet metal, and in this man-v ner, when the partition is pushed into place in assembling the device, it will not be readily displaced. The inner or bottom edge of the partition preferably engages a raised portion ZBat the bottom of the channel in the header whereby the construction is strengthened, and preferably also the partition is strengthened by the provision of the corrugations 21, as best shownin Fig. '7.

It will be observed that by my improvements the partition or dividing wall 23, when assembled with the header and core, is interposed between said parts, so as to be held in place thereby. In other Words, by attaching the header to the core the partition'or dividing wall is effectively held in place. Moreover, prior to theassemblage of the header with the core, the partition may be effectively held in assembled relation to the header by the snap interlock, as heretofore described. The header and the core are interconnected by soldering, the device being first clipped at one face of the core and then at the other face, and in this operation the solder runs up between the rim 24 and the core, and eifectively unites the parts, and in this operation, also, the solder extends over the tabs 23 of the partition and efiectively solders the partition to the header and to the core at this point, thus providing a very strong and durable con, nection. The ends of the partition flange, which are extended between the header rim and the core, serve to carry solder to and along the joint header to separate, or, in other words, be bent away from each other. For this purpose the tabs 23 on thepartition 'areformed with end extensions 23 which extend past the rim 24 and are bent down adjacent the free edge of the rim.

While I have described in considerable detail a preferred form which my invention may take, it is to. be understood that various changes and modifications may be made in the structure of claims.

What I claim is:

1. In heat exchange apparatus, a sheet metal header of channeled cross section having grooves in its side walls, asheet metal partition having tongues at its ends to engage said grooves, said header having a flanged rim, and said partition having a flange overlying said rim, and a core to the end of which said header is applied and to which the header is soldered by means of its rim, said partition flange having its ends interposed between the rim and the core and lying substantially flush with the rim.

2. In heat exchange apparatus, a honeycomb core having a plurality of fluid passages, said core comprising units having at one end of the core flat plain closed ends, a partition plate hav- 1 tition and having a rim overlying the ends of saidflange and soldered to the core. 3. In heat exchange apparatus, a header formed of sheet metal and of channeled cross section and having a flanged rim at opposite sides with depressions therein, the sidewalls of said header having grooves in their inner surfaces, a sheet metal partition member having short tongues at the ends of its body engaging said grooves and provided with a flange extending along the side of and beyond the ends of its body and engaged in the depressions of the header rim so as to be substantially flush with the rim, and a core to which said rim is soldered. 4. In heat exchange apparatus, a sheet metal header of channeled cross section having grooves in its side walls, a sheet metal partition having tongues at its ends toengage said grooves, said header having a flat rim and said partition having at its inner part a flange extending at its ends and lying flatwise against said'rim, and a core having portions abutting and soldered to said header rim and said partition flange, the ends of the partition flange being substantially flush with the rim.

5. In heat exchange apparatus, a core having liquid passages extending to an end thereof, a header having an outstanding marginal rim abutting the margins of the end surface of the core, and a partition for dividing said header into separate chambers, located within and extending across the header, said partition being provided with a flange lying against a core wall which is disposed between certain of said liquid passages, and the ends of said flange being extended between the header rim and the core and serving to carry solder along the joint between the flange and the core.

6. In heat exchange apparatus, a core having liquid passages extending to an end thereof, a header having a rim abutting portions of the end surface of the core, and a partition for dividing the header into separate chambers, lo-

cated within and extending across the header,

said partition being provided with lateral tabs contacting portions of the core and underlying the header rim and soldered to the core and rim.

EDWARD A. GURLIK.

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