US1840318A - Radiator core - Google Patents

Description

Jan. 12, G HORVATH /41ADIATOR CORE Filed March 7, 1929 2 Sheets-Sheet l I N VEN TOR.

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A TTORNE Y.

Jan. 12, 1932. G. M. HORVATH I 1,840,318

RADIATOR CORE Filed Marclf'l, 1929 2 SheetSSheet 2 INVENTOR.

A TTORNE Y.

Patented Jan. 12, 1932 PATENT OFFICE GEZA M. HORVATH, OF DETROIT, MICHIGAN RADIATOR CORE Application filed March 7, 1929. Serial No. 344,938.

The present invention relates to heat exchange devices and more especially to socalled radiators for liquid cooled internal combustion engines such as are used with automotive vehicles.

Among the objects of the invention is to provide a core for such radiators which shall be more easily and economically constructed than the commonly used types of radiator L core and which at the same time shall be more eflicient in heat exchange than the known types of construction.

Another object is the simplifying of the operation'of preparing the partsand assembling them in the proper relation.

7 Still other objects will readily occur to those skilled in the art upon reference to the following description and theaccompanying drawings in which Fig. 1 is a fragmentary View in elevation of a radiator constructed in accordance with the present invention.

Fig. 2 is an elevation of a portion of the core of such a radiator.

;5 Fig. 3 is a side elevation taken as from either side ofthe construction shown in Fig. 4.

Fig. 4 is a section on the line 44 of Fig. 3.

Fig. 5 is a perspective view of a portion of 7 one of the spacer elements.

0 Fig. 5a is a section on line 5a-5a of Fig. 5. 7

Figs. 6 to 10 inclusive are perspective views showing the steps of formation of one of the water tubes.

4 As indicated in the drawings the radiator core consists broadly of a series of flattened vertical tubes maintained in spaced relation by means of spacers 21 which latter are adapted to present a very large area of )surface to the air passing through the core between the tubes 20. The spacer is preferably of the form shown in Fig. 5 and consists of a strip of metal of good heat conduc tivity such as copper orbronze shaped as ini dicated in' thisfigure.

By passing the strips of metal through suitable rollers or dies they are slitted and corrugated as indicated in this figure so as to present numerous angular projections on each 1 side of the centralplane of the sheet and it is preferred to so form these strips that there are approximately the same number of angular projections on each side of this plane. These angular projections, which are indicated at 22, are all of substantially the same height so as to contact with a water tube as will be described later; and it is preferred also to bend the metal left in the median plane alternately up and down as indicated at 22a so that the passing air will be deflected laterally.

The spacer elements described are produced preferably by means of such a machine as is set forth and claimed in the prior United States Patent No. 1,940,212, issued Sept. 18, 1917, to the present applicant.

The water tubes are preferably formed as indicated in Figs. 6 to 10 and also in Figs. 3 and 4. In the formation of the tubes the flat blank is first passed through suitable rollers to give it the formation shown in Fig. 7 in which two parallel depressed portions 31 are separated by a wide flat portion 32 and having a flat edge 33 on each side.

. The next step in the operation of forming the tubes consists in regularly corrugating the portions 31 to produce the effect indicated at 31a in Fig. 8.

After the ribbon or blank has been formed as in Fig. 8, it is cut to a suitable length and bent over on itself along the line 35 so as to produce the flattened corrugated tube with the edges 33 coming together.

Before the bending operation which is described, is carried out, it is preferred to flatten the blank at each end and bend outward at right angles a portion thereof to form a flange have been hooked together as indicated the.

mating hooking elements will be flattened to fix them permanently together in a tightly locked seam. This operation provides a series of the flattened tubes of whatever number may be found desirable, all locked together to form a unit.

the angular projections on the spacing elements will each lie in a depression of the corrugatedwallofawater tube. 7 7

Before forming the parts as described above, is it preferred to tin the metalso that all of the parts will be provided .witha coat: ing of the tinning material which will'preferably be a soldering material, so that. after.-

assembling the several parts as just mentioned the whole assembly is ,theniheatedgto such temperature as will melt the tinning or soldering coating thereon I and when the -'assembly isallow-ed to cool all the parts will be united into one whole.

'By this operation the spacer element becomes united to th'e water tubes with-ametallicunion and permits thereby the ready conduct of heat from the walls of the tube to the spacer element and consequently a more ready passageof heatfrom the water-to the passing air.

In carrying out the heating opera-"ion the simplestmethod and the preferred method is to dip the assembly into a bath of oil, preferably palm oil or tallow, heated to a sufficient,

temperatureso that-the oil not only furnishes the heat necessary for the soldering operation, butacts as a fluxto prevent oxidation during the heating and'also acts as a meansto prevent oxidatlon during the cooling off ofthe assembly.

However, before allowing the assembly,-

thus prepared 'to' cool, it is preferred to dip the front andrear faces a short-distance into a bath of melted solder so as to reinforce the edges of the spacers and tubes and insure the sealing of the edges of the latter.

The corrugating of the walls of-rthe water tubing increases the outside area andalso a more intimate contact-between the water and the metal of the tubes is accomplished because of the agitation ofthe waterpassing therethrough. The strength of the assembly is also increased in that-the projecting portions of" the spacer are lined in position through their lying Withinthecorrugations Even before soldering the assembly-the coacting ofthese angular projections or corrugations In a radiator core, a plurality of parallel,

vertically disposed water tubes each of which includestwo substantially parallel and adj acent sheets having symmetrically disposed, horizontal, outward crimps or projections, each sheet having-'its -upper and lower edges bentoutwardlyto form horizontal flanges having elongated hooks on their free edges,

the hooks of the adjacent sheets of-adjacent tubes being interlocked to form a core, the tubes being-formed to provide-a str ight line, vertical path therethrough, the spaces between theinterlocked sheets containing a spacer memberw having projecting portions which overlap and :underlap the projections or crimpsof the tube-sheotsand which are secured thereto, substantially: as shown.

GEZA M. HORVA'DH;

prevents relative movement of" the parts, in, 5 handling the assembly:

It Yllll be noted that the presentconstruction provides for conductionof the heat from the water notonly to the outer surfaceofthe water tubes as in conventional construction but'also toth'e metal ;of the spacer, thereby greatly increasing the heat dissipation surface. v

Further, forming the spacers, as def scribed and uniting them with the watei" tubes, the latter are greatly reinforced and enabled to withstand considerable internal Nil

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