US2011756A

US2011756A - Radiator core structure

Info

Publication number: US2011756A
Application number: US566071A
Authority: US
Inventors: Nicholas S Diamant
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-09-30
Filing date: 1931-09-30
Publication date: 1935-08-20
Anticipated expiration: 1952-08-20

Description

Aug. 20, 1935. N, s DIAMANT 2,011,756

RADIATOR CORE STRUCTURE Filed se t. 50, 1931 v IN ENTOR.

ATTORNEYS.

1 Patented Aug. 20, 1935 PATE OFFICE.

RADIATOR cons STRUCTURE Nicholas "s. Diamant, Highland Park, Mich. Application Swanse 1931 Serial No. 566,071

ZiClaims. (01157 130) This invention relates to heat interchanger.

core structure of the type used in automobile radiators and particularlyto improved spacer .plates for radiator cores.

5 In radiator cores of the cellular type it has become conventional practice to separate adjacent liquid passages by a pair of fluted spacer plates having adjacent convolutions contacting at alternate vertices with eachotherand having their intermediate spaced vertices contacting with the vertices of similar convolutions of the adjacent liquid passages. This arrangement provides three columns of cells between each pair of liquid courses, the cells of the outer and middle columns being called liquid bound and air boundcells, respectively. i

The spacer plates are generally-provided with protuberances which extend into the air and water bound cells for producing turbulence. Heretofore, it has been the practice to uniform- 1y distribute protuberances of equal sizes throughout the depth'of thecells and to determine the'amount' of turbulence by the size of the protuberances. Since the protuberances reduce the air flow through the cells,'their size is necessarily limited, for increasing of the size of the protuberances beyond a certain limit causes a reduction in the air flow through the cells which reduces the cooling of the core morethan the turbulence. r i r I have found that; the. turbulence producing means whichare located at or near the entrance tOrthELQGllS are tremendously more eifectivethan the rearward protuberance, or other turbulence -producinglmeans. The effect ,of the rearward protuberance upon the turbulence of the air, is insufiicient to compensate for the loss of cooling by the obstruction which these protuberances offer to the passage of air. By employing a construction at the entrance to the cells which produce substantially violent turbulence, or by 'providing protuberances of substantially uniform size along only the forward portions of the spacer plates sufficient turbulencejis produced without obstructing the air .fiowto an extent which causes a loss in cooling efiectgreater than-the amount that the cooling effect 'is augmented-by the turbulence producing means of any one portion of the cells. "This may'also be accomplished by cooling isincreased by. the resulting increase in providing non-uniform protuberanceswhich decrease in size from the front edges of the spacer plates to the rear edges thereof, or combining any of the above turbulence producing means in the same structure.

a The main objects of the invention are to produce initial air turbulence in the cells of a radiator core; to provide turbulence producing means which extend over only that portion of the walls of the cell'at which the cooling effect resulting 5 from turbulenceofthe 'air flow is greater than the reduction or cooling effect caused by the obstructionofiered to the air flow by the turbulence producing means; and to provide turbulence producing means on the walls of the 10 cells which progressively decrease in size from the front tothe rear end portions of the cells.

A furtherobject of the invention is to provide shoulders between the entrances to adjacent waterbound cells which serve as baffles and pro-' duce substantially violent initial turbulence as the air enters the cells. p illustrative embodiment of the invention is shown in the accompanyingdrawingyin which:

Fig. l is a fragmentary front elevation of a radiator core which embodies my invention.

Fig. 2 is a horizontal section taken on theline 2-2 of Fig. 1.

Fig.3 is a fragmentary perspective view of a spacer "plate having initial turbulence producing means. v

Fig. 4 is a-fragmentary perspective view of a spacer plate which embodies a modified form of the invention.

Inthe form shown in Figs. 1 to 3, the radiator core structure includes spaced liquid courses, or conduits I, each of which comprises a pair ofconvoluted

sheet metal plates

3 and 4 having inwardly offset marginal portions 5 and 6 solderedtogether. Between the sides of the conduits and the offset marginal portions thereof are shoulders i and 8 which extend substantially normal to the sides of the conduits.

'- 'A pair of convoluted fins or spacer plates 9 ;are dispose d between the conduits lwith alter- 40 nate' vertices I0 and II of their convolutions contacting with each other and with the vertices of" alternate convolutions of the conduits. This arrangement, as illustrated in Fig. 1, provides an interm ediate, vertical column of air bound cells [2 and spaced verticalcolumns of liquid bound cells l3.

Formed in thevertices of the convolutions of the spacer plates 9 which contact with the convolutions of the water courses I are aligning creases I4 which extend from the front to the rear edges of the spacer plates. Alternate inner vertices of each spacer plate are provided with aligning grooves I5 in which the registering vertices of the other spacer plate are received.

The marginal 'edgeportions [6 of the spacer plates 9 eXten-d outwardly beyond the shoulders 8 of the water courses and they are substantially in the same planes as the corresponding intermediate portionsof the sides of the convolutions.

of the spacer plates. With this constructiomthe shoulders 8 are not covered by the marginal portions 'of the spacer plates. amount of heating or cooling surfacefper unit cell is slightly increased, while the amount of material remains unchanged; this slight increase, however, becomes very appreciable when multiplied by the large number of cells whichlin. an average radiator may amount to 8,000 or, more. Further, these shoulderspwhich are 10- cated between adjacent liquid bound cells I3 J of each column serve as bafiies to produce a comparatively violent initial turbulence in :the 'air flow at the entrance to the cells.

Numerous other advantages are obtained by permitting th ,marginal portion l6 of the spacer plates to protrude-in a straight course beyond the shoulders and in spaced relation to the offset-portions Sand 6 of the plates ,3 and4 of the liquid conduits. ;Wi th this constructiongthe vertices of each spacer plate may extend in astraight course'from the front to therear edges of the core structureand thus the spacer plates may be conveniently formed-in production and shifted intoproper alignment with the liquid; conduits during assembly. However, with the I conventional design in whichthe oifsetniarginakpori ign p the s a r'p at s rres te at iffitu is er nged nr odu o wh n v r themarginal portions at the irontedge of the spacer plates are-notequal in; widt h to those at the rear edge. This condition occurs in v production quite commonly and the marginal por tions'ofth e spacer plates, if too long at the front, project beyond the marginal portions-5 and 61 of the water course while at the rear edge the reverse condition, occurs. By eliminating the offset mar-- ginal portions on the spacer plates, the dies'by which these plates are formed are simplified and ,rn'ad-e less 'expensive to produce. Further, when the marginal portions of" the spacer plates. are changed'and made to take a straight course, any unequal wearingof the dies which, form these marginal portions, with respect to the dies which form the marginal portions Band S'of the liquid 'conduit plates produces no trouble in production.

Further, with the spacer platesihaving Offset gmarginal portions it'becomes necessary ,to provide for a substantial clearance space between the shoulder of the plates of the liqui-dcourse s and the shoulder of thewspace'r plates, in order to assure continuous contact between the intermediate por'tio'ns. of the, vertices plates andliquidconduits.

molten solder during core depending on the 1 number of cells, present at the front andjre ar ,fa'cesII If these clearance spacers are reduced by forming the marginal portions of the spacer plates so as to'substantially contact withthe' corresponding portions of the vertices of the spacer plates, they tend to hold Therefore, the

of the spacer Thisclearance space obviously lbecomes filled with. solder when .the core. structure is dipped in its production. The presence of srrfiall.recess of this type in which solder accumulates involves a lwastejof from two tofsix'pounds oflfilder per' the intermediate portions of the vertices of the spacer plates from contacting properly with the registering vertices of the liquid conduits, and

the difficulties of aligning and preventing unequal wear of the dies are increased. I

The spacer plates 9 have protuberances i9 and I 5 which extend outwardly from opposite surfaces of the sides of the convolutions, respectively. These protuberances extend into the air bound I and liquid bound cells and produce turbulence in theair therethrough. In theior nshown in Fig. 3," the protuberances' are -provided on only the forward portions of the spacer plates so that as the air enters both the air bound and liquid exposed shdulders 8 and also by the protuberarices 29. The rearward portions of the air bound p and liq'uidlbotindcells are unobstructed. Thus,

bound cells,in'itial turbulence is'produced by the turbulence is produced depthwise in the cells in .a

mann'erwhich causes a' limited reduction in the air flow-throughthe cells and which does not reduce the cooling of the coremorethan the cooling is increased by 'the; resulting increase in turbu- 'lence. v

Intheform shown in'Fig, 4, the. spacer plate 9' has convolutions substantiallyL'identical to those shown in but the protuberances l9, are

or non-uniform size I These protuberances :are distributed; throughout substantiallyv the entire width of the spacer 9. and they decrease in size from the forward end portion of the spacer plate to the rearward end portion thereof. With this construction, turbulence is produced throughout the entire length o'f the cells, but the obstruction to the passa e chair through the cells is decreased at the rearward portions thereof'so as to prevent the obstruction offered by, the protuberances from reducing the coolingefiect, more than the turbulence whichthe prdtuberahces create increases h o lin e fec c l v V Although but several specified embodiments of th s i veniiqnh -he be n s o n an escribedit; willbe understoodthat various changes yin th e size shape and arrangement of parts'rnay b ma e wit out dep r m the it f my ,invention and it iSgIlOt my; intention to limit the :scope other thanbyhthe' terms of the appended lclaimspu. o I I :What I .claim .is: .7

volutedsheet metal, and series of protuberances extending fromlLthelwallT-cof the. convolutions of ,said spacer plate and decreasingin size progressively fromnthe front tothe rear edgeiportions ther'eof."

2.iIna radiator core structure; a water course- 1:;Aradiatoflcore spacerfplate-including con-