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Publication numberUS3435891 A
Publication typeGrant
Publication dateApr 1, 1969
Filing dateMar 23, 1967
Priority dateMar 23, 1967
Publication numberUS 3435891 A, US 3435891A, US-A-3435891, US3435891 A, US3435891A
InventorsFrank W Parrish
Original AssigneeInt Rectifier Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Air flow baffle for rectifier heat exchanger
US 3435891 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

' AApril 1, 1969. l |l=.w. PARRISH AIR FLOW BAFFLE FOR RECTIFIER HEAT EXCHANGER sheet l or 2 f Filed uarch 23. 1%?

AIR FLOW BAFFLE FO RECTIFIER HEAT EXCHANGER Filed March 23.- 1S67 April l, 1969 F. PARRISH 2 ofz Sheet A fw m@ w M y 4 y |V M Inflil/ M M w lll IIIIH /II| on K, Q W if W 4/ 4@ f w a w e y MWW\ M, Zv Il. Y .r Ullin y IJ, L@ M I hl Ma Ir f uw Q Ml [ad Wa M y" .wz y, n I in @L Lf 2\O 7u Q 3 Mw l www 4., ik 5. n l .if G. E 4H v I z Arm/@5x5 United States Patent Oiice U.S. Cl. 165--121 3 'Claims ABSTRACT F THE DISCLOSURE An air baille positioned in the air shunt space between two forced cooled heat exchangers has bailles which direct air away from the path between the heat exchangers and into the surfaces of the heat exchangers. The baille is made of insulation material and has bailles of progressively longer lengths to redirect air from the air shunt path over the full length of the heat exchangers.

This invention relates to forced air cooling and more particularly relates to a novel air baille located in the air shunt space between two forced air heat exchangers for distributing the air from the air shunt region into the surfaces of the heat exchangers along their full length.

It is, therefore, a primary object of this invention to improve the eiliciency of the cooling medium in a forced cooled pair of spaced heat exchangers.

Another object of this invention is to utilize, for cooling, the air or .gas which normally ilows through the space between spaced heat exchangers which have ilns to increase their surface areas.

These and other objects of the invention will become readily apparent upon a consideration of the following descriptions and ydrawings in which:

FIGURE 1 shows in perspective two spaced heat exchangers for receiving diodes in connection with a cooling fan for directing cooling air along the iinned surface of the heat exchangers.

FIGURE 2 shows an electrical circuit diagram of a circuit which incorporates the structure of FIGURE 1.

FIGURE 3 is a perspective view of the air baille of the present invention.

FIGURE 4 is a top view of the heat exchangers of FIGURE 1 with the air baille of FIGURE 3 disposed in the air shunt between the two heat exchangers.

FIGURE 5 is a cross-sectional view of FIGURE 4 taken across the section line 5-5 in FIGURE 44.

Referring iirst to FIGURE 1, there is illustrated a typical arrangement of forced cooled heat exchangers, which are conductive buses and 11 having suitable elongated cooling ns of the usual type. Buses 10 and 11 have suitable threaded openings which threadably receive the threaded studs of parallel connected diodes 12, 13, 14 and 15, 16, 17 respectively. Buses 10 and 11 are closely spaced, but are insulated from one another when they are operated at different potentials. A common source of forced air or gas, such as fan 18 then directs air along the length of buses 10 and 11 and their respective fins.

FIGURE 2 is a typical circuit application for the arrangement of FIGURE 1 as a single phase-ful1 wave rectiier including a suitable transformer 19, the diodes 12 to 17. For purposes of illustration, buses 10 and 11 are considered connected to the anodes of diodes 12 to 17, thus requiring electrical insulation between buses 10 and 11. Obviously numerous circuit applications would require such insulation.

Since the ends of the adjacent iins of buses 10 and 11 must be spaced from one another an air space, or air shunt exists between the buses. This space oilers less im- 3,435,891 Patented Apr. l, 1969 pedance to air ilow than do the fins, so an appreciable amount of cooling air ilows directly through this air shunt without contributing to the cooling of buses 10 and 11.

In accordance with the invention, a novel baille is located in this air space and contains a plurality of spaced vanes of increasing length for diverting air passing down the air shunt laterally from the shunt and toward the adjacent surfaces of the shunt.

FIGURE 3 shows the novel baille 30 in perspective view as comprising a molded unitary body having a base 31 which has a central vane 32, and laterally directed vanes 33 to 40 extending therefrom. The rear of central vane 32 spreads into end vanes 41 and 42. A top section 31a similar to base 31 is also provided but is removed in FIGURE 3 in the interest of clarity. Each of the vanes 33 to 42 form the same angle to central vane 32, of about 45 but the vanes become progressively longer to successively pick off a more interiorly disposed section of air in the air shunt. As will be seen, this permits the air of the air shunt to be uniformly distributed along the full length of the heat exchangers, or buses 10 and 11, forming the air shunt. Convenient mounting openings such as opening 43 are provided in base 31. Batlle 30 is made of material which has high dielectric strength, is resistant to arcing, is stable at high temperatures, presents a smooth surface to prevent adherence of dust, resistance to chemical attack, good `dimensional stability and low to moderate flexibility. Typically, the baille could be made of polyvinylchloride.

While FIGURE 3 shows the vanes extending inwardly from the lateral sides of the base 31, it is clear that other vane arrangements could be used to break up the laminar ilow of air in the air shunt and to induce turbulence into the air and cause impingement of the air on the heat exchangers.,Moreover, other vane shapes with various air foils could also be used.

FIGURES 4 and 5 show how the baille of FIGURE 3 can be inserted into the air shunt between buses 10 and 11 of FIGURE l.

FIGURES 4 and 5 illustrate insulation support base members 50, 51 and 52. Buses 10 and 11 are bolted to supports 50, 51, and 52, as illustrated in FIGURE 5 by bolts 53-54 and 5556 for the case of support 50. The baille 30 is thus bolted into the free air space between the ends of the adjacent ilns of buses as by bolts 57 and 58 which pass through openings in base 31 and into openings in supports 50 and 52 resectively. Air ilow will then be diverted as shown by the arrows in FIGURE 4 with the progressively longer vanes diverting the air in the air shunt laterally toward one or the other of the buses 10 and 11.

Although there has been described a preferred embodiment of this novel invention, many variations and modifications will now be apparent to those skilled in the art. Therefore, this invention is to be liinited, not by the specific disclosure herein, but only by the appending claims.

The embodiments of the invention in which an exclusive privilege or property is claimed are defined as follows:

1. In combination, a iirst elongated heat exchanger; a second elongated heat exchanger parallel to and spaced from said iirst heat exchanger; a source of forced gas for moving gas along the direction of elongation of said iirst and second heat exchangers; and elongated baille means positioned in the space between said iirst and second heat exchangers; and elongated baille means positioned in the space between said iirst and second heat eX- changers and extending parallel to said iirst and second heat exchangers; said elongated baille means comprising a base section having a central vane extending longitudinally along said base section and a plurality of vanes perpendicular from said base section and positioned alternately on opposite sides of said central vanes; said pluralityy of vanes longitudinally spaced along the length of said base section and extending generally perpendicular to the plane including said rst and second heat exchangers and said baffle means; said plurality of vanes having generally plane surfaces forming acute angles to the -direction of elongation of said baille means to divert air flow along the space between said rst and second heat exchangers toward the adjacent surfaces of said irst and second heat exchangers; the adjacent surfaces of said rst and second heat exchangers having longitudinally extending ns; and a central vane extending longitudinally along said base section; said plurality of vanes positioned alter- 15 nately on opposite sides of said central vane.

2. The combination as set forth in claim 1, wherein said plurality of vanes have a progressively increased length in direction of air flow.

3. The combination as set forth in claim 1, wherein 4 said plurality of vanes extend inwardly from the lateral sides of said base section and fall short of said central vane.

References Cited UNITED STATES PATENTS 2,169,109 8/ 1939 Muller 317-234 X 2,340,855 2/1944 Abrams 165-51 X 2,842,722 7/ 1958 Diebold S17-234 2,904,316 9/ 1959 Hagen et al 165-126 2,927,250 3/ 1960 Scharli 317-100 3,179,570 4/1965 Le Foll 165-181 X 3,364,987 1/ 1968 Bylund et al. 1165-122 X ROBERT A. OLEARY, Primary Examiner.

A. W. DAVIS, JR., Assistant Exwmine.

U.S. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2169109 *Jul 8, 1936Aug 8, 1939Gen ElectricAir cooling means for dry rectifiers
US2340855 *Aug 12, 1942Feb 8, 1944Victor R AbramsSupplementary radiant heat cooling fins
US2842722 *Mar 4, 1957Jul 8, 1958Int Rectifier CorpRectifier mounting device
US2904316 *Jul 26, 1955Sep 15, 1959Union Stock Yard And Transit CCold room cooler for meats and other perishable products
US2927250 *Sep 16, 1957Mar 1, 1960 Cooling arrangement for semi-conductor rectifiers
US3179570 *Aug 1, 1960Apr 20, 1965Commissariat Energie AtomiqueThermal exchange of the fuel elements in nuclear reactor
US3364987 *Sep 23, 1965Jan 23, 1968Asea AbRectifier assembly comprising semi-conductor rectifiers with two separate heat sinks
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3590915 *Apr 15, 1969Jul 6, 1971Gunter RiedelHeat sink assembly for electronic components
US3790860 *Jul 17, 1972Feb 5, 1974Trygen Electronics IncPower supply chassis assembly for electronic circuit with cooling
US3792338 *May 31, 1972Feb 12, 1974Nouvelle De Fab Pour L Auto LeSelf-contained transformer-rectifier assembly
US3870930 *Oct 18, 1973Mar 11, 1975Siemens AgImproved semiconductor rectifier assembly having a pivotable control module
US4007402 *May 29, 1975Feb 8, 1977The Lucas Electrical Company LimitedThree phase full wave rectifier assembly
US4161016 *Dec 12, 1977Jul 10, 1979General Electric CompanySemiconductor and heat sink assembly
US4184199 *Aug 14, 1978Jan 15, 1980Siemens AktiengesellschaftHeavy duty rectifier
US4535384 *Jun 12, 1984Aug 13, 1985Fujitsu Ltd.Heat sink for a semiconductor device
US4670817 *Oct 1, 1984Jun 2, 1987Venus Scientific Inc.Heat sink and interconnection arrangement for series connected power diodes
US4790373 *Sep 8, 1987Dec 13, 1988Hughes Tool CompanyCooling system for electrical components
US4802532 *Jan 23, 1987Feb 7, 1989British Telecommunications Public Limited CompanyHeat sink
US5053920 *Oct 9, 1990Oct 1, 1991Digital Equipment CorporationIntegrated power conversion
US5304845 *Sep 30, 1992Apr 19, 1994Digital Equipment CorporationApparatus for an air impingement heat sink using secondary flow generators
US8125776 *Feb 23, 2010Feb 28, 2012Journée Lighting, Inc.Socket and heat sink unit for use with removable LED light module
US8724325 *May 19, 2009May 13, 2014Hamilton Sundstrand CorporationSolid state switch arrangement
US20100296254 *May 19, 2009Nov 25, 2010Schnetker Ted RSolid state switch arrangement
US20110207366 *Feb 23, 2010Aug 25, 2011Journee Lighting, Inc.Socket and heat sink unit for use with removable led light module
Classifications
U.S. Classification165/121, 363/141, 174/16.3, 165/80.3, 257/909, 361/694, 165/138, 257/E23.99, 257/722
International ClassificationH01L23/467
Cooperative ClassificationH01L23/467, Y10S257/909
European ClassificationH01L23/467