Патент USA US2044952код для вставки
June 23, 1936. F. A. NEVEU RADIATOR GORE. Filed Aug. 11, 1954 2,044,952 Patented June 23, 1936 2,044,952. UNITED STATES PATENT OFFICE 2,044,952 RADIATOR CORE Frank A. Neveu, Los Angeles, Calif. Application August 11, 1934, Serial No. 739,453 5 Claims. The present invention relates to new and use ful improvements in heat transfer devices, and more particularly to that type of radiators which are adapted for use in connection with the cool 5 ing systems of automobile engines or other power plants. ‘ ' , An object of my invention is to provide an arrangement effecting an increased expanse of radiating surface of the radiating ?ns of which a 10 radiator is partially composed, whereby to increase the cooling ef?ciency of the radiator. It is a further object in this connection to pro vide such increased radiating surface of the radiating ?ns without obstructing the air spaces 15 between the passageway-forming tube members, and thereby permit free passage of air through the radiator. , Another object of the present invention is to provide a radiating ?n having increased radiat ing surface as referred to hereinabove, without, however, requiring additional material-in fact, considerably less material is required in a radi ator of given size and/or cooling capacity, and consequently the cost of manufacture and weight 25 of the ?nished radiator is reduced by incorporat ing the principles of my present invention therein. Yet another object is to provide a radiator ?n of novel design, one of the advantages of which 30 is that-a radiator core embodying it need not be dipped in molten solder, as is now usually done, but instead is subject to being assembled by the “baking”. process to insure soldering of the sev-. eral ?ns to their associated tube members, 35 thereby effecting a great reduction in the amount (01.,25’2-130) portion of a modi?ed form of ‘?n, also intended for use in a radiator of the “cellular” type. Figure 3 is, a fragmentary, perspective view showing the radiating ?n of the present inven tion adapted for use in the “tubular” type of radiator. Portions of the ?gure illustrating the front of the radiator are broken away the better to show the interior construction. In terms of broad inclusion, my present in vention contemplates the use of metal fabric, or 10 wire mesh, as the material used in the construc tion of radiating ?ns for a radiator, instead of the sheet metal commonly employed for this purpose. 1 More speci?cally described, the improved radi- 15 ator ?n of the present invention comprises a sheet of wire fabric, preferably copper screen of suitable size of mesh, and composed of screen wire of suitable gauge and preferably round in cross section. The wire fabric is cut to proper 20 size and bent to proper shape to meet the re quirements of the radiator ?n. This improved form of ?n is adaptable for use in either the “cellular” type or the “tubular” type of radiator, and is susceptible to being formed into any size 25 and/or shape of ?n in order to meet the require ments of any particular installation.‘ Wire screen is available commercially in sheet form, and, on account of the smaller amount of metal necessary to form a sheet of given size, is con- 30 siderably less expensive than sheet copper,‘ which ‘is the material now commonly employed in the manufacture of radiator ?ns. Of more import ance, however, is the superiority of a radiator ?n made of wire mesh from the standpoint of 35 , of solder required in the construction of a core. . heat-radiating e?iciency as compared with a The invention possesses other objects and ad more conventional sheet metal ?n. ' vantageous features, some of which, with the foregoing, will be set forth in the following de scription of the embodiments of my invention which are illustrated in the drawing ‘accompany ing and forming a part of the speci?cation. It is understood that I do not limit myself to the 45 showing made by the said drawing and descrip tion, as I may adopt variations of the described 40 forms within the scope of my invention‘ as": set forth in the claims. Referring to the drawing: 50 ' r / ' Figure 1 is a fragmentary view in perspective showing a portion of a radiator core of ‘the “honey-comb’? or “cellular’? type, having incor porated therein a ?n embodying the principles ‘of the present invention. " Figure 2 is a perspective view showing a small This increase in e?iciency is due to the large number of foramina de?ned by the interwoven wires of metal fabric such as copper screen, inas~ 40 much as their presence insures much more inti mate contact of the air ?owing through the air passages between the tube members of a radia tor core with the metal of the ?n. It .is common practice in making ?ns from ‘15 sheet metal to deform the sheet with a large number of protrusions, corrugations, restrikes, blades, and the like, and to cut openings of vari ous size, shape, and position in the sheet in the attempt to develop a great amount. of turbulence 50 in the stream of air ?owing through the core, aswell as to cause contact of the flowing‘ air with the metal of which the core is made. The pur pose of resorting to such expedients is to remove as great a quantity of heat-from the metal con-' 55 2,044,952 2 ?ning the heated water as possible, the phe nomena of conduction, radiation, and convection all being relied upon to perform this function and thus to effect the transference of as much heat as possible from the water or other medium with in the tube members to the air ?owing through the air passages. To my knowledge, however, the use of wire screen as the material from which to a construct radiator ?ns has never before been 10 resorted to; whereas by its use, the problem of providing means for insuring the very greatest de gree of intimate contact with the metal has been met, and moreover, without interfering with or impeding the flow of air through the air passages. The air is caused to pass through a much higher number of ori?ces than can possibly be formed in any sheet metal ?n, thereby reducing the blast of air to a very large number of very ?ne streams of air, each of which is in very close contact with an area of material size contacting the associ ated ?n 8, thereby increasing the efficiency of heat transference from the tube member to the wires of the ?n, which, as will readily be under stood, are very highly ef?cient in transferring the heat to the air impinging thereagainst. The preferred form of ?n 8 for use with this type of tube member, when composed of inter woven metal wires as hereinabove .disclosed, is also deformed to present a series of corrugations, 10 but,v instead of extending transversably as has heretofore been the practice, the corrugations 2| of each ?n 8 extend longitudinally of the core, preferably throughout the entire length thereof from the upper header tank to the lower. The 15 corrugations 2| serve to increase the e?ective thickness of each ?n, enabling it to hold the two adjacent tube members ‘I separated and thus present an air channel 22 therebetween. Each \ 20 the wires de?ning the ori?ce through which that ' of the side walls of each longitudinally extend thus causing-the intimacy of contact which can be ‘developed only by means of a cutting edge ing corrugation 2| being very porous, practically no impedance is offered thereby to the ?ow of air through the channel 22,- in spite of the fact that very intimate contact of each particle of air with 25 exposed to air ?ow, and also causing turbulence, the effect of which is to direct the ?ow of air out of a straight path and into contact with a neigh boring portion of a water tube, another ?n, or another section of the same ?n. These facts are is preferable to use a ?n 8 wherein the corruga tions 2| .also are ?attened at their crests 24 thus stream is ?owing. Each of the many wires forms a cutting edge against which the air impinges, so, believed to explain partially the superiority of wire screen in the manufacture of radiator ?ns over sheet metal used for that purpose. Moreover, these advantages and others can be gained without sacri?ce of any of the advanta 35 geous features of sheet metal. If the design of any particular make of radiator core calls for any particular con?guration of ?n, the wire screen is just as susceptible to being so formed as is the more conventional sheet metal. Hence 40 any desired size, shape and/or spacing of tube members may be resorted to, the ?n being cut, bent, and/or otherwise formed into whatever size and shape of ?n is desirable with the selected tube members. 45 . v ' Figure 1, for example, shows a small portion of a radiator core 6 made up of alternately posi tioned water tube members 1 and radiating ?ns 8, the latter of which being comprised of inter ,Woven wire 9 of metal, preferably copper, embody '50 the principles of my present invention. Whereas the ?n is adaptable to any suitable type of water tube member, each of the tube members ‘I illus trated is made up of a pair of elongated strips II and |2 of copper the width of which coincides 55 'with the thickness of the ?nished core. Alon-g their edges l3 the two strips are in contact-with 20 the wires of the ?n is had a number of times equal 25 to twice the number of corrugations 2|. ' With the illustrated type of tube member ‘I, it forming corrugations 2| which are substantially 30 square in cross section, and presenting relatively large areas of contact between each ?attened crest ll of each corrugation l6 of- the proximal tube member ‘I. However, Figure 2 illustrates a modi?ed form of ?n 3| adaptable for use with 35 various other well known types of tube members of a “cellular” type core, but also embodying the present invention inasmuch as it also is con structed of wire fabric 32. This ?n 3| is also corrugated, but it di?ers from the previously de 40 scribed ?n 8 in that its corrugations 33 extend. transversably instead of longitudinally and each corrugation 33 is of triangular cross section. In order to facilitate assembly it may in some instances be advisable to provide slight irregu larities-in the surface‘of each tube member adapt ed to be engaged by complementary irregularities in the surface of the proximal ?n, thus serving as locators tending to hold the several members against slipping one on the other prior to and during the soldering process. Such locators are illustrated in Figure l as taking the form of a depression or socket member 36 at each end of each crest l6 of the tube members, within which sockets are seated, raised portions or beads 31, one of which is formed along vthe outeredge of each other and are bent to zig-zag form, whereas ‘ each outer corrugation 2| of each ?n 8. Figure 3 illustrates my present invention em- intermediate their edges, the strips are separated to de?ne a water channel l4 therebetween. -The bodied in a radiator core 4| of the “tubular” type. Here, instead of extending longitudinally of the 60 60 water channels |4 thus presented establish com munication between the upper and lower header core parallel to the tube membersand zig-zag tanks (not shown) in accordance with usual ging back and forth between two adjacent tube practice, and hence, during operation of the de members, each ?n 42, while being composed of vice, each channel M has a stream of heated - woven wire fabric 43, extends transversably of the 65 ‘water to be cooled ?owing through it. In order tubes 44, each tube 44 extending through an ap to induce turbulence in the stream of water in erture 4B in each ?n, these apertures being suit each channel l4, and thus cause more of the ably proportioned to insure contact between each heat of the water to be transmitted to the metal tube 44 and each ?n 42. The extent of such of the tube member, it is customary to deform contact can be materially increased by extending 70 the metal de?ning the water channels, as, for ?aps 41 of the metal fabric displaced in forming example, by providing transversely extending ' corrugations IS in any of several arrangements. Here the crest of each outwardly extending cor each aperture along the adjacent side wall 48 of the associated tube 44. Moreover, I prefer to bend the forward edge 5| of each ?n 42 so > rugation‘is preferably ?attened as indicated at as to form a ?ap 52 lying in a plane perpendicu 76 H. Each of these ?attened crests I1 provides lar to that of the remainder of the ?n and ex 75 2,044,952 tending ‘into contact with'the next adjacent ?n. In this manner, the front of the radiator pre sents the appearance of a continuous, ?at wire ' screen, concealing the tubes 44 therebehind" and 3 2. A radiator construction comprising a plural-J ity of tube membersdisposed in spaced parallel relation, and a radiating ?n disposed between each two adjacent’ tube members, each of said‘ requiring that all the air passing through the ?ns being composed of wire screen and corru 5 air passages between tubes ?ow through the rel gated to provide corrugations having their crests atively ?ne apertures presented by such a‘ screen. alternately on oppositefaces of the ?n, said It is customary commercial practice in assem Acrestsmaking contact with the associated tube bling cores using ?ns made of sheet metal to. members, and said corrugations extending sub 10 fasten the parts permanently together by dip stantially parallel to said tube members thereby 10 ping the assembled core in a bath of molten disposing the side walls of the corrugations in solder, causing the ?ns _to be soldered to the positions extending across the air passages'be tube members in an integral structure.‘ It is vtween said tube members, said tube members preferable, however, when using ?ns embodying having irregularities in the surfaces thereof and 15 the present invention, to avoid the dipping proc said ?ns having irregularities in the surfaces , ess of soldering, as such method would have the thereof complementary to and engaging those of tendency to clog the openings of the screen of said tube ‘members to restrain said tube mem.— which each ?n is made. Rather, a “baking” bers against movement relatively to said ?ns process should be used, wherein each tube mem prior to permanent fastening thereof. ' 20 ber is ,“tinned” before assembly, and after as .3.,In a radiator construction, a core compris 20 sembly the core dipped in a suitable acid or ‘ing a plurality of wire mesh ?ns disposed in flux, and then the entire core placed in an oven spaced‘ parallel relation, and aplurality of tube or the like where its temperature is raised high er than the melting point of the solder. The 25 solder already present on the tube members will ?ow onto the portions of the ?n in contact there- - with-forming a “sweated” joint fully as e?i cient from the standpoints of strength and heat transference as a “dipped” joint and requiring 30 so much less solder as to amount to a saving of from one to four or more pounds of solder per members spaced apart, each of said tube members extending through and making contact with all r of said ?ns, said ?ns being bent adjacent their forward edges and each ?n so bent making con tact with the next adjacent ?n to present a sub stantially continuous screen extending across the front of ‘said core. 4. In an automobile radiator, a core compris 30 ing water tube members spaced apart to de?ne core, depending on the size of the latter. The passages through which a flow of air in a predew saving in weight thus attained is material, but termined direction is induced, said water tubes extending angularly with respect to the direction the reduction in cost of the core is of still greater importance, because the cost of solder is so high as to represent a very material item in the cost of the ?nished product. The present invention contributes in another way toward reduction of manufacturing cost for the reason that} the of said air ?ow, and a ?n of foraminous material 35 interposed between each two adjacent water tube members, and-corrugated to de?ne corrugations having their crests alternately on opposite ‘faces of the ?n, said corrugations extending sub amount of copper screen necessary to construct ‘stantially parallel to said tubes and angularly 40 a ?n of given size costs materially less, because of the smaller amount of metal present, than the with respect to the direction of said air ?ow, amount of sheet copper necessary to form a ?n associated tube members and the side walls of the corrugations extending across said air pas sages, whereby said?ow of air is required to pass 45 through the foramina in said side walls. 5. In a radiator construction, a core compris of that same size. I claim: ' ' ' _ 1. A radiator construction comprising a plural ity of tube members ‘disposed in spaced parallel frelation, and a radiating ?n disposed between ' each two adjacent tube members, each of said ?ns being composed of wire screen and corru ‘ gated to provide corrugations having their crests alternately on opposite faces of the ?n, said crests making contact with the associated tube members, and said corrugations extending sub stantially parallel to the direction of ?ow through said tube members thereby disposing the side walls of the corrugations in positions extending ' across the air passages between said tube mem bers. the crests of said corrugations contacting the ing a plurality of ?n members of foraminous ma? terial disposed in spaced, parallel relation, and a plurality of tube members arranged in contact ' withosaid ?ns for transmission of heat therebe tween, said ?ns being bent adjacent edges there 'of to present po'rtions lying in the plane of the associated face of said core and contacting the next- adjacent member whereby all air going through the spaces between saidtube members is required to ?ow through at least one thickness of said foraminous material. - ' ' FRANK A. NEVEU.