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Publication numberUS2819731 A
Publication typeGrant
Publication dateJan 14, 1958
Filing dateNov 16, 1954
Priority dateNov 16, 1954
Publication numberUS 2819731 A, US 2819731A, US-A-2819731, US2819731 A, US2819731A
InventorsLouthan Chester F
Original AssigneeGen Motors Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Refrigerating apparatus
US 2819731 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

1 Jan. 14, 1958 c. F; LOUTHAN REFRIGERATING APPARATUS Filed Nov 16, 1954 INVENTOR. Chester 5 Loy/hon BY W a?- H/s Attorney United States Patent REFRIGERATING APPARATUS Chester F. Louthan, Union, Ohio, assignor to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application November 16, 1954, Serial No. 469,069

1 Claim. (Cl. 138-38) This invention relates to refrigerating apparatus and more particularly to a heat exchanger and the method of manufacturing the same.

One object of this invention is to provide a heat exchanger having flat tubing capable of withstanding high internal pressures without distortion of the flat walls of the tubing.

It is an object of this invention to provide a heat exchanger made from multiple passage tubing capable of being bent into serpentine shape with sharp bends.

Still another object of this invention is to provide a multiple passage tubing which may be bent without using complicated or expensive dies or other devices for preventing collapse of the tubing at the return bends.

More particularly it is an object of this invention to provide a relatively fiat tube having a corrugated separator disposed within the tube.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

In the drawings:

Figure l is an elevational view showing a heat exchanger constructed in accordance with the invention;

Figure 2 is a fragmentary pictorial view showing the construction of the multiple passage flat tubing used in making the heat exchanger shown in Figure 1;

Figure 3 is a fragmentary sectional view on an enlarged scale showing the construction of one of the return bends;

Figure 4 is a fragmentary end elevational view showing a modified type of joint between the upper and lower side walls of the tube;

Figure 5 is a view similar to Figure 4 showing still another modification; and,

Figure 6 is a view similar to Figures 4 and 5 showing a rolled and brazed joint.

Referring now to the drawings wherein a preferred embodiment of the invention has been shown, reference numeral 10 generally designates a heat exchanger having a fluid conduit comprising a flat Walled tube 11 which has been bent into serpentine shape as shown and in which button type fins 12 have been slipped over the outside of the straight portions of the tubing so as to increase the eifective heating radiating surface. A frame element 14 serves as a support for use in mounting the heat exchanger in an air duct or the like. Reference numerals 16 and 18 designate the usual headers for use in making connection to the interior of the serpentine tube.

As best shown in Figure 2 of the drawing, the preferred embodiment of tubing consists of upper and lower strips 20 and 22 respectively which have transversely extending corrugations arranged as shown and which are provided with side flanges 24 which are roll-welded together so as to form one continuous section of relatively flat walled tubing. Figures 4 through 6 show alternate type of joints which may be provided between the edges of the strips. The alternate joints are preferably brazed 2,819,731 Patented Jan. 14, 1958 joints. A corrugated insert 26 has been provided as shown and this insert serves to separate the interior of the tube into a plurality of parallel passages. The insert 26 as well as the flat side walls of the tubing are corrugated transversely for a purpose to be described more fully hereinafter. The insert is formed by first forming the relatively shallow transverse corrugations in a sheet and then forming the relatively deep longitudinal corrugations.

The insert 26 is placed between the corrugated strips 20 and 22 before the edges 24 are roll-welded together. Suitable brazing material (not shown) which may be either in powder, sheet, slurry, or wire form is placed within the tubing and also between the fins and the outer walls of the tubing so that after the fins 12 have been placed on the appropriate portions of the tubing and the tubing has been bent into serpentine shape and fitted with the headers 16 and 18, the assembly may be heated so as to braze the fins 12 to the outer walls of the tubing and so as to braze the insert 26 to the side walls of the tubing along the lines where the insert 26 contacts the side walls 20 and 22. By virtue of the fact that the insert 26 is provided with transversely extending corrugations which are complementary to the corrugations formed in the side walls 20 and 22, it is obvious that when the brazing material is melted it will serve to anchor the insert in place so as to form a plurality of longitudinally extending passages. The insert as well as the corrugations in the side Walls of the tube help to add rigidity to the tubing as well as to facilitate the transfer of heat between fluid in the tube and fluid outside the tube.

The corrugations also make it possible to form sharp return bends in the tubing without danger of any collapsing of the tube at the return bends. As best shown in Figure 3 of the drawings, the corrugated portions adjacent the inside edge of the return bend becomes slightly compressed whereas the corrugations adjacent the outside edge of the return bend are slightly elongated. By virtue of the above described construction and method of manufacture, it is possible to form integral return bends in multiple passage tubing without causing undue restriction at the return bends.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, as may come within the scope of the claim which follows.

What is claimed is as follows:

A return bend construction for use in a heat exchanger comprising in combination, a fluid conveying conduit having a plurality of spaced apart substantially parallel and arcuate wall portions, a divider element interposed between said wall portions and comprising a single strip of metal arranged in zigzag form to provide a plurality of internal fins extending between said spaced apart portions of said conduit and disposed in intimate thermal contact therewith, each of said walls and said divider element having registering transversely extending corrugations, said corrugations being closer together at the inside of each return bend than at the outside of the return bend.

References Cited in the file of this patent UNITED STATES PATENTS 1,791,483 Dalgliesh Feb. 3, 1931 1,890,625 Shaw Dec. 13, 1932 1,899,080 Dalgliesh Feb. 28, 1933 1,909,005 Paugh May 16, 1933 2,068,955 Kritzer et al Jan. 26, 1937 2,090,222 Neveu Aug. 17, 1937 2,488,615 Arnold Nov. 22, 1949 2,621,027 Tatsch Dec. 9, 1952

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1791483 *May 20, 1930Feb 3, 1931Res & Dev CorpHeat-exchange device
US1890625 *Jul 7, 1930Dec 13, 1932Harold N ShawRadiator
US1899080 *Oct 29, 1931Feb 28, 1933Res & Dev CorpHeat exchange device
US1909005 *Jun 16, 1930May 16, 1933Wolverine Tube CompanyMethod of making corrugated wall tubing
US2068955 *Apr 4, 1935Jan 26, 1937Hoesel Anthony FRefrigerating coil
US2090222 *Apr 20, 1935Aug 17, 1937Frank A NeveuRadiator core
US2488615 *Jun 5, 1944Nov 22, 1949Modine Mfg CoOil cooler tube
US2621027 *Dec 11, 1946Dec 9, 1952Richard TatschPanel heating and cooling system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3013108 *Aug 2, 1956Dec 12, 1961Amp IncApparatus for insulation and compensation of electrical conductors for high temperature ambient conditions
US3043103 *Oct 10, 1958Jul 10, 1962Gen Motors CorpLiquid cooled wall
US3062021 *Dec 12, 1960Nov 6, 1962Grose Ansel BDevice for dispensing frozen fluffy cream and the like
US3348402 *Mar 27, 1964Oct 24, 1967Electrolux AbMethod of making coil for absorption refrigeration apparatus
US3412787 *Aug 8, 1967Nov 26, 1968John D. MilliganHeat exchanger
US3473346 *Sep 1, 1967Oct 21, 1969Electrolux AbCoil for absorption refrigeration apparatus
US3826304 *Nov 4, 1970Jul 30, 1974Universal Oil Prod CoAdvantageous configuration of tubing for internal boiling
US3850230 *Apr 2, 1973Nov 26, 1974Atomenergi AbHeat-exchanger
US4171015 *Mar 28, 1977Oct 16, 1979Caterpillar Tractor Co.Heat exchanger tube and method of making same
US4699091 *May 8, 1986Oct 13, 1987Waters Larry GMethod and apparatus for utilizing waste heat in hot water heaters
US4805693 *Nov 20, 1986Feb 21, 1989Modine ManufacturingMultiple piece tube assembly for use in heat exchangers
US4998580 *Jan 7, 1988Mar 12, 1991Modine Manufacturing CompanyCondenser with small hydraulic diameter flow path
US5184672 *Dec 4, 1991Feb 9, 1993Sanden CorporationHeat exchanger
US6050329 *Jun 21, 1999Apr 18, 2000Mcgraw Edison CompanyCooling fin with reinforcing ripples
US7578409 *Feb 7, 2005Aug 25, 2009Stanley Jan KulasikQuick liner release strip for waste containers
US7726390 *Jun 6, 2003Jun 1, 2010Erbslöh Aluminium GmbhHollow chamber profile made of metal, especially for heat exchangers
US8016025Nov 8, 2006Sep 13, 2011Modine Manufacturing CompanyHeat exchanger and method of mounting
US8261816Dec 17, 2004Sep 11, 2012Modine Manufacturing CompanyHeat exchanger with flat tubes
US8424592Jul 30, 2008Apr 23, 2013Modine Manufacturing CompanyHeat exchanger having convoluted fin end and method of assembling the same
US8516699Nov 22, 2011Aug 27, 2013Modine Manufacturing CompanyMethod of manufacturing a heat exchanger having a contoured insert
US20090260787 *Mar 15, 2007Oct 22, 2009Modine Manufacruring CompanyHeat exchanger for motor vehicles
US20110005738 *Nov 15, 2007Jan 13, 2011Modine Manufacturing CompanySoldered flat tube for condensers and/or evaporators
CN101821563BJul 8, 2008Mar 12, 2014工业伊尔皮亚股份公司Refrigeration circuit
DE10359806A1 *Dec 19, 2003Jul 14, 2005Modine Manufacturing Co., RacineWärmeübertrager mit flachen Rohren und flaches Wärmeübertragerrohr
EP0128023A1Jun 1, 1984Dec 12, 1984Engelhard CorporationCooling assembly for fuel cells
WO2009010839A2 *Jul 8, 2008Jan 22, 2009Ilpea Ind SpaRefrigeration circuit
WO2010055468A1 *Nov 10, 2009May 20, 2010Industrie Ilpea S.P.A.Refrigeration circuit
U.S. Classification138/38, 62/523, 165/177, 29/890.35, 62/515, 165/179, 165/149, 29/890.46
International ClassificationF28F9/00, F28F1/08
Cooperative ClassificationF28F1/08, F28F9/00
European ClassificationF28F1/08, F28F9/00