US1791483A - Heat-exchange device - Google Patents

Description

Feb. 3, 1931i. H.'v. DALGLlEsH 1,791,483

HEAT'EXCHANGE DEVICE Filed May 20, 1930 2 Sheets-Sheet 1 @Wwf/ 4. 'Y MW mmmf Feb. 3, 1931. H. v. DALGLIESH HEATv EXCHANGE DEVICE Filed May 20, 1950 2 Sheets-Sheet 2 dummy:

Patented Feb. 3, 1931 UNITED STATES PATENT OFFICE HERBERT V. DALGLIESH, OF ATLNTA, GEORGIA, ASSIG-NOR, BY MESNE ASSIGNMENTS, TO RESEARCH & DEVELOPMENT CORPORATION Application led May 20,

l tortuous passage for a liquid in contact with a wall exteriorly contacted by a gaseous medium of different temperature so arranged that substantially the entire surface of the wall is utilized for heat conduction and that portions of the liquid are caused to move more slowly than other portions thereof to provide a homogeneous temperature throughout the bodyv of the liquid. A

Y It is a further object of the invention to provide a heat exchange device comprising spaced corrugated plates so arranged as to present no direct path for liquid to flow therebetween but forcing the liquid to flow in a tortuous path and provided with means to space the plates apart and to correctly locate the plates relative to'each other in assembly, said means providing internal bracing for the plates.

It is a further object of the invention specically to provide an oil cooler for use with internal combustion motors.

Further objects of the invention will ap pear from the following description when read in connection with the accompanying drawings showing illustrative embodiments of the invention and wherein Fig. 1 is an end view of an oil cooler;

Fig. 2 is a side elevation of an oil cooler partly broken away;

Fig. 3 is a plan view of the heat exchange element of the cooler partly broken away;

- Fig. 4 is a detail vertical cross section of a form of the device wherein the heat exchange elements are arranged in parallel suitable, for instance, for use as an automobile radiator;

Fig. 5 is a detail horizontal section on line 5-.5 of Fig. 4; l;

Fig. 6 is a detail perspective view, the end 'shown in vertical section to illustrate the structure of the heat exchange device, the arrangement shown being that adapted for an 1930. Serial N0. 454,013.

oil cooler such as shown in Figs. 1 to 3'in.

elusive; and

Figs. 7 and 8 are detail perspective views shown in end section of modified forms.

As shown in Figs. 4 and 6, the heat exchange elements constructed in accordance with the invention are formed of corrugated plates 10, 11 shown as formed with angular corrugations although it is obvious that curved corrugations may be utilized in the same manner.

To space the plates 10, 11 apart and to properly locate the corrugations of the two plates with respect to eachother so as to provide a tortuous path for liquid flowing therebetween, there are shown a plurality of spaced strips 12 which are likewise corrugated but with corrugations considerably more shallow than are the corrugations of plates 10, 11.

The strips 12 are as shown applied vto one of the plates as for instance plate 10 with the apices of the interiorly projecting corrugations of plate 10 in contact with the apices of the oppositely directed corrugatins of the strip 12 and the plate 11 is then placed into contact with the strips 12 with the apices thereof in contact with the alternate corrugations of the strips. The result of such assembly is that the corrugations of the plates 10 and 11 are in nested relation but spaced apart from each other providing a zigzag path for flow of liquid between the plates, the spacing being such as to cause a slight overlap of the inwardly -extending corrugation .crests.

Since the strips 12 are provided with corrugations more shallow than the corrugations of the plates 10, 11, the liquid owing between the plates `has access to the inner surfaces of the plates 10, 11, not only between the strips 12 but behind the saine and the liquid flowing between the plates will flow more rapidly in the spaces between the strips 12 than does the liquid which enters the spaces behind the strips. There will thus result a multitude of eddies in the liquid causing the liquid to be thoroughly mixed as it flows between the plates and the entire body of liquid will be cooled. or heated uniformly as it leaves the space between the plates.

tinned, with solder and then the plates and strips pressed together are heated to cause 'the 5 contacting portions of lthe plates with. the strips to adhere by`virtue of the solder thus providing a structure whichis-inwardly rein'- forced suiciently to prevent moderate pressures from', causing bulging of the plates. In the form of the invention shown in Fig. 7 the strips. 12 arewreplaced by .sheets of wire mesh material; 30 which sheets are each -provided a fstructurfe which is more easily assembled and which proyides a greater num-y ber of points 'of adhesion than provided by the strips. -The wire mesh will still cause a thorough mixing ofl the liquid flowing ;0 through the device and will also give substantially the entire radiating surface of? the co1'.-

rugated plates.

In the form of Fig. 8 the strips .12 are replaced by wires 31 which are also corrugated u; but provide a less mixing. of the fluidaslt flows lbetween the plates.

In the vutilization of thejexchange element thus described as an oil cooler for use with internal combustion enginesin the form shown Figs.l 1 to 3 inclusive and 6, the platesof. a desired width, that is a desired extent longitudinally of the'corrugations, are assembled in such manner as to provide for How of oil through the elements in-series.. As shown in Fig. 6 the first` two platesV 10 `and 11'to the left of the figure have their end margins ex-l tended, lapping as at 13 andsoldered together and into 'the opening thus provided a coupling pipe vmaybe introduced and soldered as for instance that shown at 14Fig. 3. At the lower end of 'the plates lOand 11 just referred to the plate 10 of the first pair'of plates -is lapped togetherwith the plate 10 of the second .element as indicated lat 1,5,`the

lapped margins lbeing soldered together and also the margins of the plates l1 of these two elements are lapped as indicated at 16, the arrangement being such as to provide'a header to receive liquid from the lirst vertical travel -between plates 10 and 1l,v which header is in communication with the second pair of plates.

'By the provision of laps lland 18 shown at the top o f Fig. 6, the -next pair of elements is likewise connected and the arrangement is .which it is desired to utilize as for instance three pairs as shown in Figs. lg'to 3 inclusive. As an outlet for oil from `the final pair of plates of the series, a pipe` 32 is shown as to. By this construction the flow of oil will continued throughout the number of elements be'substantially uniform across the width of the last element from bottom to .top thereof.,

closed as by dipping the end of t e assembled device into a bath of solder leaving the spaces between the plates 10 and the plates 11 respectively 'open for passage of the gaseous medium as air 1n the case of the oil cooler.

The ends of the lowenheaders are shown 'as provided with cleanout screw plugs 33 llwhich mav be removed to enable corrugated vas al whole ito .the4` same depth' as the strips12 and tinned. There is thus In utilizing the thus described structure as van oil cooler there' is shown a Vcasing 21 as ofsheet' metal shaped into -rectangular form with the endsl turnedl into parallel iian ges 22, 23 which may be secured together as by bolts 24 when the'assembly indicated in Fig. 3 has been placed therein.

Desirably angle members 25 are secured into each' corner of the casing 21 to space the heat exchange element from,.the walls of the casing 21 to permit air to ow therebetween. l To direct air into the space between the plates ,10 and 11 oflthe assembly of Fig. 3,

there 'is shown a aring'extension of the walls'` `of the casing 21indicated at 26. i

In use of thisidevice for cooling an internal combustlon engine as for mstanceof an automobile, thefdevice 1s supportedln any suitable manner as at one side of themotor with the flaring member 26 directedtoward the stream of air from'the fan of the motor and' ,the 'oil passages .of the device are placed into the circulation of the oil of the motor by means of couplings 14 and 19. Desirably the device is connected in series with the usual loil filter, therefore being in a bypassof the main lubricant circulation to the bearing sursettlings to faces of the motor.1 This arran ement is' desirable since experiments have s own that so connected the co ling of the oil will be suf- ,ficient with rela ively sma-ll overall dimensions of the device andbecause in the'bypass the pressure upon the oil will be less.than would be metwith inthe main oil circulaltion. Obviously however the device may be placed in the said main circulation system,'in

vwhich event a larger device must be utilized to vprovide passage -of .the large quantity 'of internal pressures. It is 'obvious that the device may be placed as a section of the radiator of the automobile, and when so' applied may be formed with a less number of vertical elements ofv greater height ,lif desired.,A

For other uses of the invention the elements comprising plates 10, 11 and strips ,12 may be oil therethrough without developing too great ias connected to upper and lower headers27, 28, 3

as indicated i'n Figs. 4 and 5 in which ar rangement the passage of liquid to be cooled through the elements would be in parallel.

While the wire mesh of Fig. 7 is shown ar'-l ranged with the wires erpendicular and parallel respectively wit the corru ations of the plates, it is obvious that all o the wires Y different VVtempera/17117@ Minor changes may be made in the physical embodiment of the invention within the scope of the appended claims without departing from the spirit of the invention.

I claim:

1`. A heat exchange element comprising, in combination, spaced deformed plates associ- 1 ated to provide a tortuous path for iiuid flowing therebetween,` a plurality of spaced elements between said plates spanning said deformities and contacting the plates at a plurality of spaced points whereby said fluid may surround said elements to provide heat exchange within the mass of the fiuid,said elements providing heat conductivity between said mass and said plates.

2. vAn oil cooling` device comprising, in

' combination, a plurality of heat exchange elements as claimed in claim l connected for flow ofoil therethrough in series, means to .connect the first and last of said elements to the lubrication system of a machine.

3. An oil cooling device comprising, in combination, a plurality of heat exchange elements as claimed in claim l4 arranged in parallel relation, headers connecting an end of each element 'with the adjacent' end of the y succeeding element to provide for flow of oil therethrough in series and means to connect the free ends'of the lirst and last elements with the lubrication system of amachine.

4. An oil cooling device comprising, in combination, a plurality of heat exchange elements as claimed in claim' 1 arranged in parallel relation, headers connecting an end of each element with the adjacent end of the succeeding element to provide for flow of oil therethrough in series, means to connect the free ends of the iirst and last elements with the lubrication system of a machine, and removable plugs in the ends of some of headers for cleaning purposes.

`5. heat exchange element comprising, in combination, spaced deformed lates associated to provide atortuous path or Huid flowing ;the'rebe'tween,V spacing a vplurality of spaced'el'ements between -said plates spannlng said deformities` and secured to the plates at av plurality of s aced pointswhereby said fluid may surround said means to provide heat exchange 4within the massI of the said fluid, said elements providing heat conductivity between said mass and said plates.

6. A heat exchange element comprising, in'

combinatiomspaced deformed plates inwardly presenting alternate convexities and concavities, those on each plate arranged 1n staggered relation to those on the opposed plate, spacing and turbulence producing means between said plates, said means comprising a sheet o f f grg'amjnousmateral, Said sheet conta'tiiig and secured to the inwardly directed ,crests of said deformities.

rial spaced -apart a distance substantially equal to their width, said strips contacting with and secured to the inwardly directed crests of the corrugations of the plates.

8. A heat exchange element, comprising in combination, spaced corrugated plates providing a tortuous passage therebetween, a

plurality of spaced spacing elements between said plates, said elements corrugated to a less depth than said plates and with the distances between crests equal to the corrugations of said plates, the concavities of the corrugations of the elements contacting with the inwardly directed crests of the corrugations of the plates.

9. A heat exchange element, comprising-in combination, corrugated 'plates so spaced apart that the crests of the inwardly directed corrugations stand closely adjacent a common plane, a plurality of spaced spacing and locating elements between said plates, isaid elements corrugated to register with the corrugations of said plates but to a less depth than the latter, the concavities vof the corrugatio'ns ofthe elements contacting with the inwardly directed crests of the corrugations of the plates andsecured thereto at a plurality of points along each of said crests.

10. A heat exchange element, comprising in combination, corrugated plates-so spaced that the crests of the inwardly directed corrugations stand closely adjacent a common plane and opposite the concavities of the oposite plate corrugations, spacing and locating means comprlsing a plurality of wires extending at an angle to the said corrugations, said` wires corrugated to register wlth the corrugations of the plates but tor a less depth than the corrugations ofthe plates, the concavities of the wire corrugations :contacting with and secured to theinwardly-facing crests of the corrugations of the plates.

11. A heat exchange element, comprising in combination, a plurality of corrugated plates so spaced and arranged that the Walls of the corrugations of each are parallel to those of the other with the inwardly directed 5 crests closely adjacent a common plane, spacing vand locating means between said plates comprising a sheet of Wire mesh material corl rugated as a whole to register with but-corrugated to a less depth than said plates, some .o ofthe wires of said mesh extending at an f angle to the corrugations of said plates, the inwardly directed crests of the plates contacting with the concavities of and` secured to the corrugations of the mesh. 5A `12. An oil cooling device comprising, in combination, aplurality of parallel spaced elements each comprising a pair of spaced I corrugated plates providing a tortuous path Vfor liquid therebetween, the spaces between ofsaid k'plates at the edges thereof closed, an end of the outside elements closed and pro` vided with means for coupling to an oil circulation pipe of a machine, the plates of the alternate ends of the elements overlapped 5 with and connected to the plates of the adj acent elements to provide headers to enclose la path for oil flow through the assembled elements in series, an open'ended casing enclosingV the assembly and a flaring 'ilange to i direct a blast of air through the assembly lengthwise of the corrugations.

13. An oil cooling devicecomprising, in. combination, a plurality of spaced elements each comprising' a pair of spaced deformed i plates providing a tortuous path for liquid therebetween, the spaces between the plates of each elementat the edges thereof closed, an end of each outside element closed and provided with means for coupling to an oil circulation pipe of-amachine, means to place each Vof the alternate remaining ends of said j elements intocommunicationwith an end of an adjacent element to enclose a path for oil i'low ythrouh said elements in series and f means in the outlet end element to provide more-restricted How from said element adjacent the coupling than at the edge remote therefrom.

' HERBERT V. DALGLIESH.

'I CERTIFICATE or CORRECTION.

'Patent No. 1, 791,'4153. Granted February' 3, y 1931, to

HERBERT v.-DALCL1ESH.

AIt is hereby certifiedvthat error' appears in the printed specificationf the.I above numbered patent requiring correction` as follows: Page 3, line`60, claim "-.Y'lstrike out `the word "spacing"; and that the said Letters Patent should'be Aread with this correction therein that the same may `eonformtothe record of,

' thecasc in the lPatent Office. 1 l i y' Signed and ysealed this 24th day of February, A. D. 1931.,

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