US3298432A

US3298432A - Radiators

Info

Publication number: US3298432A
Application number: US369478A
Authority: US
Inventors: Przyborowski Stanislaus
Original assignee: Individual
Current assignee: Individual
Priority date: 1964-05-22
Filing date: 1964-05-22
Publication date: 1967-01-17
Anticipated expiration: 1984-01-17

Description

Jan. 17, 1967 S. PRZYBOROWSKI RADIATORS 3 Sheets-Sheet l Filed May 22, 1964 FIGQ' INVENTOR.

borows /a' S'an/s/aus pr BY /n/ A TTY Jam 17, 1967 s. PRzYBoRowsKl RADIATORS 3 Sheets-Sheet 2 Filed May 22, 1964 INVENTOR. lam'slaus Pybomu/s/ United States Patent O 3,298,432 RADIATORS` Stanislaus Przyborowski, 234 Allenhurst Road, Amherst, N.Y. 14226 Filed May 22, 1964, Ser. No. 369,478 2 Claims. (Cl. 165-153) This invention relates to heat exchange apparatus, and it has particular reference to improved iin and tube cores of the cellular-tubular type adapted for use in `automobile radiators or car heaters.

In modern production of fin and tube cores, the dual desiderata of high thermal efficiency and exceedingly light-weight in the fin elements of the core has provoked manufacturing problems, such as difficulty of production and loss of physical strength in the core. This has been aggravated in the slit fin type of ribbon which is physically weaker than former types. In the present invention, the handicaps of the slit 1in and extremely light gage ribbon is overcome through the provision of a completely reinforced ribbon which permits clean shearing and constant reproduction with normal tooling methods. The reinforcement is so devised that it is attained with advantageous increase in thermal effectiveness as a result of its ability to promote proper air flow characteristics.

Otherfeatures of the invention including assembly advantages will be more fully set forth as this description proceeds, and the novelty will be pointed out in the appended claims. In the drawings:

FIG. l is a general view of the rear face of a radiator having the lin and tube structure of the invention.

FIGS. 2 and 3 are side and bottom views of the radiator of FIG. 1.

FIG. 4 is an enlarged section on the line 4-4 of FIG. 2.

FIG. 5 is an enlarged section on the line 5-5 of FIG. 4.

FIG. 6 is an enlarged fragmentary side elevation as viewed from the right of FIG. 3.

FIG. 7 is an enlarged fragmentary section on the line 7-7 of FIG. 6.

FIG. 8 is a view of the radiator ribbon after the first forming thereof, and before the nal forming operation.

FIGS. 9 and 10 are views similiar to FIG. 8 where the ribbon is provided with differing preliminary forming.

FIG. ll is an enlarged fragmentary cross section similar to FIG. 4 of another embodiment of the invention where the ribbon of FIG. 10 is used.

FIG. 12 is a view showing diagrammatically the forming steps involved in the production of the ribbon.

The radiator 10 of FIG. l consists of upper and

lower tanks

11 and 12, respectively, between which extend equally spaced parallel tubes 13 of the typical flat cross section. Fins 14 in the form of zig-zag ribbons occupy the spaces between adjacent tubes and contact the tubes to provide extended heat exchange surface as well understood in the art. Y

The fins 14, wherein the invention resides, are of the slit type with the difference that in its preliminary form has a at ribbon R (FIG. 8) with advantageously located reinforcements before finally being lslit `and formed into zig-zag formation. This Will be better understood by referring to FIG. 12 where a coil C of at ribbon material is introduced between preliminary forming rolls F to provide the pre-formed at ribbon R of FIG. 8, whereupon it then passes through rolls Z, wherein the ribbon is finally formed into slit and zig-zag formation before being cut into proper lengths in a shearing unit S. In FIG. 8, there is shown a portion of a preliminary formed ribbon R which is used in the form illustrated in FIGS. l through 8, inclusive. It will be seen that the marginal and

medial portions

15 and 16 of the ribbon are provided with

transverse corrugations

17 and 18, respectively. In the intermediate areas M between such corrugations, equally 'ice spaced continuous vertical ribs 19 are provided. When the ribbon is folded into zig-zag formation to provide the finished fins 14, the folds 20 thereof are nearly parallel as appears in FIG. 7, where the marginal corrugations 17 may be seen to the left of such view. Referring now to FIGS. 4, 5 and 6, it will be seen that the intermediate areas M are cut to provide slit portions 22 having the same spacing as the vertical ribs 19 which occupy the center of each slit portion. The slit portions 22 are bent in angular fashion to provide a plurality of air inlet nozzles 23, thereby providing a structure capable of disseminating air owing from the front to the rear of the radiator core 10.

The medial portion 16 of each fold 20 is formed with an enlarged truncation 25 having a flat top 26 containing the previously described central corrugation 18 and sloping sides 27 terminating at the innermost of the slits 22. The right hand folds as located in the conventional section FIG. 7 show the corrugated formation at the center of the truncations 25, while the intermediate folds show sections through the vertical ribs 19 of the slit portions 22.

It is preferred that the crests 24 of the zig-zag formation of the lfolds 20 be sligthly depressed at areas which are contacted by the tubes 13 to form saddles 29. Such saddles are very slightly offset from the top of each press, and in providing a moderate seat for each tube, -it effects a better soldering operation as will be presently described.

It will be observed in FIG. 5 that in the outermost slit portions adjacent the margin of the ribbon that the corrugations 17 have actually been cut through. This is advantageous particularly when the ribbon is of minimum thickness, since it has been found that clean shearing even with the fairly dull tools can be effected.

In the embodiment of the invention FIGS. 10 and 11, the ribbon R1 is preliminarily formed throughout its area with a herringbone formation of ribs 32 of extremely fine spacing. When this ribbon is given its nal processing, it appears -as in FIG. ll, wherein the ns 33 are bent into folds 30 as in the first embodiment of the invention. 'Ihe folds 30 are cut to provide a plurality of slit portions 34, and a medial portion 35 containing an enlarged truncation 36. The crests 37 are formed with depressed areas which form saddles 291 for receiving the tubes as in the first embodiment of the invention.

The ribs -and/or corrugations as described are useful during the process of forming and slitting the ribbon and also provide yafter assembly of the radiator, a selectively strengthened structure, not interfering with but rather enhancing the heat exchange values of the radiator. It is therefore not intended that the invention be limited to the precise location and disposal of such ribs and corrugations since it is anticipated that they may be variously applied, depending on the type and usage of the radiator. For example, in FIG. 9, a uniformly transverse rib 38 in a ribbon R11 is shown. This may be useful in cores where compressive yielding of tthe ribbons is desired. It is therefore intended that numerous variations of the principle heretofore described may be used without departing from the spirit of the invention except as set forth in the accompanying claims wherein,

I claim:

1. A radiator comprising spaced tanks, each having header portions, a core including a plurality of independent tubes having an elongated cross-section, said tubes being positioned between said headers and being grouped in rows at the `front and back of the core with their narrow dimensions disposed transversely, and continuous fins of Zig-Zag formation disposed between said rows, said zig-zag formation consisting of crest portions and relatively planar folds, a plurality of slits formed in each of said folds, said slits being disposed relatively perpendicular to Patented Jan. 17, 1967` said crest portions and having portions offset relative to the planar folds, and corrugations of fine pitch formed in said fins and disposed angularly With respect to said slits, said corrugations being of a herringbone arrangement and being disposed throughout 4a major area of said folds, said tubes being solder coated to permit bonding of the tubes to the tins upon application of heat.

2. A radiator comprising spaced tanks, each having header portions, a core including a plurality of independent tubes having an elongated cross-section, said tubes being positioned between said headers and being grouped in rows at the front and back of the core with their narrow dimensions disposed transversely, and continuous ins of zig-zag formation consisting of crest portions and relatively planar folds, a plurality of slits formed in each of said folds, said slits being disposed relatively perpendicular to said crest portions and having portions oset relative to the planar folds, and corrugations of ne pitch formed in said ns in the marginal portions of the folds thereof disposed substantially parallel to each other and to said crest portions, and ribs formed in each slit portion of said folds, said ribs being disposed substan- References Cited by the Examiner UNITED STATES PATENTS 1,950,500 3/1934 Loprich et al. 165-152 2,011,854 8/1935 Emmons et al. 113-118 2,063,757 12/1936 Saunders 165-153 2,252,210 r8/1941 Seemiller 113-118 3,003,749 10/1961 Morse 165-152 FOREIGN PATENTS 635,188 4/1950 Great Britain.

ROBERT A. OLEARY, Primary Examiner.

v 20 A. W. DAVIS, Assistant Examiner.

Claims

2. A RADIATOR COMPRISING SPACED TANKS, EACH HAVING HEADER PORTIONS, A CORE INCLUDING A PLURALITY OF INDEPENDENT TUBES HAVING AN ELONGATED CROSS-SECTION, SAID TUBES BEING POSITIONED BETWEEN SAID HEADERS AND BEING GROUPED IN ROWS AT THE FRONT BACK OF THE CORE WITH THEIR NARROW DIMENSIONS DISPOSED TRANSVERSELY, AND CONTINUOUS FINS OF ZIG-ZAG FORMATION CONSISTING OF CREST PORTIONS AND RELATIVELY PLANAR FOLDS, A PLURALITY OF SLITS FORMED IN EACH OF SAID FOLDS, SAID SLITS BEING DISPOSED RELATIVELY PERPENDICULAR TO SAID CREST PORTIONS AND HAVING PORTIONS OFFSET RELATIVE TO THE PLANAR FOLDS, AND CORRUGATIONS OF FINE PITCH FORMED IN SAID FINS IN THE MARGINAL PORTIONS OF THE FOLDS THEREOF DISPOSED SUBSTANTIALLY PARALLEL TO EACH OTHER AND TO SAID CREST PORTIONS, AND RIBS FORMED IN EACH SLIT PORTION OF SAID FOLDS, SAID RIBS BEING DISPOSED SUBSTANTIALLY PARALLEL TO SAID SLIT PORTIONS, SAID TUBES BEING SOLDER COATED TO PERMIT BONDING OF THE TUBES TO THE FINS UPON APPLICATION OF HEAT.