US1998663A - Radiator core - Google Patents

Description

Ap 1935- w. o. EMMONS ET AL 1,998,663

RADIATOR CORE Filed March 25, 1934 fllulief 92. @mzjaui .n, M m

m 6 a d 1 m w Patented Apr. 23, 1935 I I i RADIATOR cons Willard 0. Emmons and Walter R. Ramsaur, Lockport, N. Y., assignors to General Motors Corporation, Detroit, Miclh, a corporation of Delaware Application March 23, 1934, Serial No. 716,930

3 Claims. (Cl. 257-130) a This invention relates to heat exchange devices a top tank or inlet header '2, and a bottom tank and concerns structural details of a cellular type or outlet header 3, adapted for connection, reradiator core. One of its primary objects is to spectively, with the discharge and intake fittings provide a core which compares favorably with of a cylinder block cooling jacket. For the flow of 5 commercial cores now on the market in both eilicooling medium from one tank to the other the 5 ciency and ease of manufacture, but which is less core is made up of a number of passages 4, spaced complicated in design, cheaper to produce, and apart by fin strips 5. The fln strip shown in the just as rugged in construction. drawing is of -;corrugated outline providing a The invention has to doparticularly with the I series of fins 6 extending between adjacent walls 10 formation of wall strips which are grouped in of the adjoinin tubes t divide e spa e i o 10 pairs with their intermediate wall portions spaced a number of relatively small air cells and being apart, and their opposite edges internested and j in n p apart relation at h ir sides joined together to provide a passageway for fluid with next succeeding fins through comparatively flow. In the preferred embodiment each wall wide bends 1, constituting the peaks or apices of strip contains a longitudinal succession of flat e or u Each fi has se louvered 15 main wall portions extending in a single plane p n 8 to direct, h ir Stream pr iv y with interiorly projecting head or ridge projecfrom cell to Cell in its P a through the core, tions therebetween pressed outwardly on transand in r W p Contact of h radiating 11 verse lines so as not to disturb the straight line face by a maximum number of air particles with flow of fluid, and a longitudinal succession of negli i attli o st u ti n f fl w. 20 spacer knees along each edge of the strip pressed T two S Walls of eaeh Water tube D out of the plane of the strip in the direction op- Sage 4 are identical a da nested together w t posite to but in transverse alinement with the eorre5p0nding Parts in ta r d r a ion- Each bead portions. By this arrangement, the strain involves a Preformed Strip os Width dete incident to the stretching of the metal is dismines the depth of the core As shown in the 25 tributed across the strip on a transverse line, the draw n it i mad up p i c pa y f a l n itudi- UNITED STATES PATENT OFFICE stretching of the central part balancing the nal Succession of fl w P n 9, ll lyin in stretch placedin the edges and stiffening the tube a common Plane and P v di an u obstructed againstflimsiness while leaving the inner face interior surface. A succession of spacer knees practically flat. III are pressed inwardly along both edges of the 30 Because a pair of cooperating flat faced strips Strip in corrugated Outline and these a d P owill provide a freestraight line .flow, the tube J'eetions may he termed Substantially -D with space, when the core is used in an engine cooling rounded Peaks and Valleys- Rounded d o system, for example, may be relatively narrow the u a turin standpoint, are Pr ra t for the flow of cooling water in athin stream Shari) comers, Since they are easier to form, 35 without running into conditions sometimes arissult in less die wear a the metal i not so i ely ing with plates which are corrugated t produce to tear when stretched in the forming operation. turbulence but which restrict the fiow to the out- The forming dies, which are usually of t e o let tankso that the water may be drawn out of type, may be so constructed that a he knees 40 the radiator faster than it flows into the core, are pressed out of the plane of the strip o ne 40 causing boiling, and th delivery of th aerated side, there also will be pressed in transverse water to the cylinder block. With the free flow alinement therewith, a iff nin rib or head ll of water, although in thin streams, steam pockets across Strip, but in the pp irec ion or r eliminated and a-moreunjform temperature outwardly from the wall and between the flat 4 exists between the top and bottom of the cylinder p r ions If only the edge p r n w re to be block. Y stretched the unstretched intermediate portion In the accompanying drawing, Figure 1 is a, would be too weak for practical purposes and the front elevation of a radiator assembly for use on forming of the beads, th r f re, not only ba nc a motor vehicle; Figure 2 shows in perspective a for he Stretching f the edges, u l d ri id y fragment of the core; Figure 31s a transverse secto the wall without interfering or bailling the flow 50 tion of one of the water tubes, and Figure 4 is a through the tube. vertical section through a portion of the core. To further compensa f the Stretching o h Referring to the drawing, the radiator assemedge portions, reversely pressed semi-spheroidal bly, as will be readily understood, includes a heat rroie tions I! a o m d i t wa im ediatee dissipating unit or core I, having at opposite ends 1y adjacent the knees, and these-serve tolocate 55 between one another the curved peaks I of the fin strip. They also assist in the assembly of the core by providing inclined centering and guiding surfaces on which the fins ride to final seating position. As an optional detail a central series of spacer knees l3 may be provided to guard against inward collapse of the tube, particularly if the core, is of great depth.

We claim: u.

1. A radiator core having a series of spaced fiuid passages with corrugated fin strips therebetween, each passage comprising a pair of complementary plates arranged face to face and joined along their edges and each plate being formed from a fiat strip with a series of longitudinally spaced and relatively narrow line depressions extending outwardly therefrom and defining therebetween a succession of fiat wall portions projecting in a common plane and inwardly extending ofisets of substantially V-shape, in the opposite edge portions, the peak of each inward ofiset being rounded and in transverse alinement with one of said outward line depressions and adapted to nest in staggered relation with the ofiset edge portion of the complementary plate, and a longitudinal succession of rounded embossments pressed outwardly adjacent and in transverse alinement to said inwardly offset portions for locating the corrugated fin strip.

2. In a radiator core, a series of nested plates, each having opposite edge portions stretched at regular intervals throughout its length to provide a continuous succession of spacer knees projecting from the plane of the plate on one side thereof, with the knees along one edge in transverse alinement with those along the other edge, and having its intermediate portion stretched at spaced intervals coinciding with those above mentioned to provide spaced narrow ridges in ,transverse alinement with the knees but projecting out of the plane of the plate on the other side thereof, with portions between said narrow ridges and throughout the major extent of the plate undisturbed in the plane of the plate to afford a substantially fiat wall.

3. In a heat transfer unit, a series of spaced apart fluid flow tubes, each providing a substantially straight uninterrupted passageway and comprising a pair of spaced wall strips joined and sealed at opposite edges, each strip having between its edge portions a longitudinal succession of relatively wide fiat wall portions extending in a single plane and separated one from another by relatively narrow transverse ridges pressed outwardly from said plane, and in each edge portionin transverse alinement with said ridges, a longitudinal succession of inwardly pressed spacer knees internesting with complementary knees of the mating wallstrip.

WILLARD O. EWONS. WALTER R. RAMSAUR.

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