US1893521A

US1893521A - Tube for heat exchange devices

Info

Publication number: US1893521A
Application number: US408497A
Authority: US
Inventors: Arthur B Modine
Original assignee: Modine Manufacturing Co
Current assignee: Modine Manufacturing Co
Priority date: 1929-11-20
Filing date: 1929-11-20
Publication date: 1933-01-10
Anticipated expiration: 1950-01-10

Description

Jan. 10, 1933. A. B. MODINE TUBE FOR HEAT EXCHANGE DEVICES Filed Nov. 20, 1929 W; we

:Patcnted Jan. 10, 1933 rarer:

ABTHUE TH. MODINIE, F RAGINE, WISCONSIN, ASSIGNOR TO MODINE MLANUFAG'I'URHTG LGMIPANY, 0F BAGLCNE WISCONSIN, A COBIGRATICN OF WESCQNSIN TUBE FOB HEAT EXCHANGE DEVICES Application filed November 20, 1929.- Serial No. 408,497.

The invention relates to improvements in heat exchange devices and is herein shown and described as performing the function of a device of this character which is employed to maintain a medium of an internal combustion engine in a cooled condition.

The invention has, among its prime objects, the provision of a construction whereby air which is circulated between the tubes of the radiator to efi'ect a cooling of the circulating medium, is caused to be directed by the tubes into engagement therewith, be agitated thereby and thus facilitate cooling and maintenance of the fluid in a cool condition.

It is an object of the invention to construct the fluid conducting passages in a manner to accomplish the advantages just referred to.

Another object of the invention is to form the tubes for the circulating medium in a m manner to provide a recessed ortion and an extending or protruding tubu argiortion, the latter forming a fluid passage an to arrange tubes fashioned as above-in spaced relation to each other with the projecting or tubular portion of one tube arranged relatively to the recessed portion of an adjacent tube to thereby provide' a tortuous path forair passing between the tubes and also to thereby provide means for agitating said air during its travel all between said tubes and in addition to provide means for directing said air towards the tubes to thus result in increasin the cooling efiiciency of heat exchange devices.

It is another object to combine with fluid 85 passages constructed as above, heat radiating fins, the latter being fashioned to agitate air passing between said fins.

The invention has these and other objects, all of which will be explained in detail and 4 more readily understood when read in conjunction with the accompanying drawing which illustrates one embodiment of which the invention is susceptible, it being obvious that changes and modifications may be re- 4 sorted to without departing from the spirit of the appended claims forming a part hereof.

In the drawing, Fig. 1 is a front elevation of an automobile radiator constructed ac- 59 cording to the invention;

Fig. 2 is a section taken on line 2 2 of Fig. 1, the parts being shown at a slightly enlarged scale Fig. 3 is a section taken on line 33 of Fig. 1, also slightly enlarged; and

Fig. 4 is a perspective View of the tubes employed. in the structure shown in Fig. 1, having heat radiating fins associated there- Wit 1 The embodiment of the invention illustrated in the drawing is shown as being employed in connection withan automobile radiator generally designated 10, however, it is understood that theuse of the invention is not limited to radiators employed for this purpose. The radiator shown includes the tanks 11 and 12 having theinlet 13 and the outlet 14, the tanks being connected together by a plurality of vertically arranged fluid tubes or passages 15 which form a communication between the tanks and provide passages for y the cooling medium which circulates through the radiator and back to the water jacket of an engine (not shown) with which the radiator is associated.

The structure as shown in Fig. 1 also contemplates the use of parallel horizontally arranged fins 16 which in the present construction are apertured to allow the association thereof with the tubes 15. It is understood that the tubes generally designated 15 are arranged in spaced relation to each other and thus provide a passage permitting air to travel between them.

By referring particularly to Figs. 2 and 4 it will be noted that each of the tubes generally designated 15 is fashioned to provide a plurality of longitudinally extending

fluid passages

17, 18 and 19 and the

recessed portions

20, 21 and 22, the tubular portion 18 being arranged at the recess such as 20. It

may be here stated that any desired number of projections and recess-es may be utilized. It will be noted also that the tubular passages such as 1?, l8 and 19 and the recessed portions produce shoulders 23 which form afiles which are provided to engage air passing between the tubes and cause its agitation and thus increase the cooling eficiency of the air. 1W

, Win44 By again referring to Figs. 3 and 4, it will be seen that the tubular assages form projections and that said pro ections of one tube are arranged opposite a recess of an adjacent tube and since the tubes generally designated 15 are arranged in spaced relation to each other, a tortuous space is produced between said tubes which will increase the distance which the air is compelled to travel during its passage between said tubes and thus more efficiently cool the circulating or cooling medium contained in the tubular pzssages such as 17, 18 and 19. It will also noted that the relative arrangement of the tubes such as 17, 18 and 19 and the recesses of the tubes generall designated 15 cause the air passing throug the space between said tubes 15 to be successively directed in opposed directions toward said tubes which will also agitate the air and manifestly increase the cooling effect upon the fluid circulating through the tubular passages such as 17 18 and 19. s

here be stated that the tubes gen- It ma I erally d esignated 15 may be formed of a single sheet of relatively thin material which sheet is bent longitudinally intermediate the edges of the material, the free edges thereof being brought together and welded or other wise secured with each other to form a leakproof connection at the connected edges thereof. Whereas the tubes 15 are constructed in this manner, it is understood that this particular construction need not be adhered to as various other constructions may be resorted to without departing from the spirit of the invention.

. It will be noted by again referring to 3 that a wall such as 240i a recess such-as 20 projects a slight distance beyond the termination of the side walls of an adjacent vtubular passage such as 18 and that this wall 24 is spaced a slight distance from the depressions forming the wall of the recesses such as 21 and 22 which results in providing a relatively narrow space between these portions in which a portion of the'cooling medium is contained during circulation, which will thus subject a very thin film of cooling medium to the action of a current of air and thus assist to quickly reduce the temperature of the cooling medium circulating throu. h the radiator at this point.

Asfiefore stated, it is contemplated, when found desirable, to associate the fins 16 with tubes 15 constructed as above described and to form said fins to produce means for engagin the air passing. between said tubes cause said airto be turbulated. To

vide one or more projections and recesses respectively designated25 and '26 which will engagethe air and agitateit. These fins may tures such as 2-7 to allow said fins to be provided with a plurality of aperpassed endwise along the tubes nerally designated 15 to the desired position u on said tubes to which said fins are brazed or soldered in the usual manner.

From the foregoing descri tion of the invention, it is manifest that t e construction of the tubes is such that said tubes provide a simple and efiicient means for causing air which is introduced between said tubes to be compelled to travel a tortuous path, be agitated and brought into engagement with the sides of the tubes. It is further evident that by'constructing said tubes in a manner to provide each tube with a plurality of fluid passages that the cooling medium circulating through a given tube is divided into a plurality of separate streams which will thus cause the temperature of the fluid to be more quickly dissipated. The association of fins with a construction such as this character will increase the cooling efiiciency of devices of this character and thus result in producing an effective cooling construction.

Having thus described the invention, what I claim and desire to cover by Letters Patcut is:

1. A radiator comprised of a plurality of tubes, each tube having a plurality of fluid passages, one tube being arranged in spaced relation to an adjacent tube, the fluid passages of one tube bein arranged relatively to the fluid passages 0% an ad acent tube to thereby provide means for directing air into contacLwith tubes defining said space and agitating said air during passage through said space and transversely arranged fins having air agitating'means connected with said tubes.

2. A radiator comprised of a luralit of tubes, each tube having a plurality of uid pasages, one tube being arranged in spaced relation to an adjacent tube, the fluid passages of one tube bein arranged relatively to the fluid passages 0% thereby provide means for directing air into contactwith tubes defining said space and agitating said air during passage through said spaceand transversely arran ed heat radiating strips connected withsmd tubes, said strips being formed to provide recesses and projections.

an ad acent tube to its In witness whereof, I hereunto subscribe I ago