US3695347A - Corrugated dissipator for tube and dissipator radiator core and process for manufacturing the same - Google Patents

Corrugated dissipator for tube and dissipator radiator core and process for manufacturing the same Download PDF

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Publication number
US3695347A
US3695347A US94238A US3695347DA US3695347A US 3695347 A US3695347 A US 3695347A US 94238 A US94238 A US 94238A US 3695347D A US3695347D A US 3695347DA US 3695347 A US3695347 A US 3695347A
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US
United States
Prior art keywords
straps
grille
dissipator
corrugated
set forth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US94238A
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English (en)
Inventor
Andre Chartet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chausson Usines SA
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Chausson Usines SA
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Filing date
Publication date
Application filed by Chausson Usines SA filed Critical Chausson Usines SA
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • F28F1/128—Fins with openings, e.g. louvered fins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/12—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes expanded or perforated metal plate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
    • Y10S165/507—Straight side-by-side conduits joined for flow of one fluid
    • Y10S165/509—Side-by-side conduits lie in common plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49377—Tube with heat transfer means

Definitions

  • radiators provided particularly for vehicles with a core of tubes between which are placed dissipators constituted of corrugated intercalaries.
  • the invention has came from-the surprising facts which have been found that the heat dissipation of a corrugated intercalary is at a maximum at the level of the leading edge or said dissipators and then decreases rapidly. Besides it has become apparent that it would be possible to substantially reduce the dissipator thickness if it was possible to multiply the leading edges but without restricting the contact surface between the dissipator and the tube wall. It has also become apparent that the disturbers formed up to now into the dissipators, excessively increased the loss of the air load passing through the core, whereby the air volume, that is the air mass, passing through the core is thus reduced of course to the prejudice of the quantity of the dissipated heat.
  • This invention embodies a new disturber in taking the above conditions into consideration and allowing to appreciably increase, the heat dissipation for a radiator having a specified weight of metal constituting the dissipators, or to appreciably reduce the weight of metal constituting said dissipators for a same heat dissipation capacity of the radiator.
  • the dissipator has continuous supporting areas on the tube wall between which it is placed, said continuous areas being connected to each other by folded straps, alternately bent in one way and in the other way, the straps of same bend of each fold stretching in parallel to each others whereby the straps coming next are respectively imbricated by each other.
  • the invention also relates to a process for manufacturing the above mentioned dissipator.
  • parallel and lengthwise set of slots are made, said slots being separated by a continuous section, in the lengthwise way of a thin strip to delimit parallel straps, the delimited straps are performed bya same lot of slots to fold them alternately one way and to the other, the straps, in line, made from two successive sets of slots having their curve opposite, the strip is corrugated at the level of each continuous section separating each set of straps and the so-corrugated strip advances while being retained in the undulated section thereof, which causes the straps of successive set of straps to become imbricated between each other.
  • FIG. 1 is a front view of a radiator of which the core is provided with dissipators of the present invention.
  • FIG. 2 is a diagrammatic perspective view illustrating a manufacturing step for the intercalaries of the present invention.
  • FIG. 3 is a diagrammatic elevation view at a smaller scale than FIG. 2 and illustrating another manufacturing step.
  • FIG. 4 is a sectional perspective view of the finished dissipator.
  • FIGS. 5 and 5a are lengthwise sectional views of same dissipator section, FIG. 5a showing a modification.
  • FIG. 6 is a end view partly in section along line Vl- Vlof FIG. 5.
  • FIG. 7 is a slightly enlarged sectional view and shown along line VII-VII of FIG. 5.
  • FIG. 8 is a diagrammatic view illustrating a development of the invention.
  • FIG. 1 shows a radiator in which 1 and 2 designate two water boxes provided with connection tubes 3 and a filling flange 4.
  • the water boxes overlap collectors 5 and 6 in which run the ends of the core tubes 7.
  • Dissipators 8 are placed between each tube or row of tubes 7 to form exchange secondary surfaces between the fluid circulating into tubes 7 and the fluid passing through the core.
  • a very thin metallic strip 9 is utilized, as thin as some hundredths of millimeters, for instance made of copper, brass or aluminum, and sets of slots 10, 10a, etc of a similar length are made in the lengthwise way on said strip.
  • Each set of slots is separated by a solid portion 11 designed to form the supporting surface for the dissipator on the wall of tubes 7 of the core, this supporting surface being continuous from one to the other lateral edges of strip 9, as shown in FIG. 2.
  • slots 10, 10a, etc. are for instance made with roller 12 (FIG. 3) but said slots could also be made by a press or by any other means.
  • the strip 9 is performed for example with a second set'of rollers 13 (FIG. 3) working successively on two pre-slotted sections of strip, that is, with reference to FIG. 2 on the two pre-slotted sections 10 and 10
  • This preforming causes the lengthwise pre-corrugations of successive straps delimited by slots 10, 10a.
  • two successive straps, such as 14 and 14a are respectively preformed to turn their concavity up and down, and the two next straps such as 15 and 15a are formed in the opposite direction, while the space 11 separating the two slots 10,, 10 is not preformed.
  • the bend of straps can be not continuous,-said straps being then folded at a median section and thus delimiting two sections obviously linear on each side of the folding line.
  • each strap in the cross-section way, for example by forming a median fold 16a which can be easily obtained by the same rollers as those performing the above described preforming or before this operation, with the rollers making the slots 10, 10a.
  • the transversal curve given to each strap is also alternated.
  • the strap 14 is curved in a way opposite to the one of the adjacent strap 15.
  • the result of said curve is first to slightly. separate the adjacent lateral edges of two successive straps as shown for edges a and b of straps Hand 15. Said curve also makes possible a folding of the straps more important than the one shown on FIG. 2 but only in one way.
  • the curve also makes the straps more rigid and finally is designed to create a turbulence in the fluid fiow running through the core in the direction of the arrow f 1 of FIG. 7 and consequently to increase the quantity of the dissipated heat for a same surface of metal.
  • An additional operation consists of corrugating the pre-formed strip, exactly as it is made upon the manufacturing of corrugated dissipators, which is most of the time performed with a set of rollers, such as rollers 16. Said corrugation has the effect to alternately bend in opposite directions the solid portions 11 separating each set of pre-corrugated straps.
  • each section has bowed portions 17 defining said straps.
  • the so-corrugated strip passes on a guide 18 and is directed under a block 19 which reducesthe advance thereof in the way indicated by the arrow f said advance being caused thereto by the rollers.
  • the height of block 19 is adjusted in such a way that the successive folds formed by the strip be partly crushed as the advance of the strip is reduced.
  • the pre-corrugation of the straps is increased, said straps being folded in the way they are pre-corrugated or prefolded and the straps of a fold being imbricated by those of next fold.
  • FIG. 4 it is shown that straps l4 and 14a which were oppositely folded are set in parallel to each other, it is the same for straps 15, 15a which are folded in the other way. It is also noticed that two continuous sections are respectively set on one and the other of the two sides of the formed dissipator, which is especially noticed for sections 11 and II of FIG. 2 which respectively appear at upper and lower sections of two successive folds of the dissipator shown on FIG. 4.
  • FIG. a shows a case where the straps, instead of presenting a continuous bend, are pre-folded substantially at their median section, to form angles 20, thus each of them defining appreciably linear segments 21, 22.
  • each strap corresponds to more than two successive folds of the constituted corrugated dissipator.
  • the friction made by the block is substantially the same as the one made by the guide 18, it can then be obtained that the section 1 1 be shifted by half-a-pitch in comparison with section 11,, that is be placed just at the median section of the space separating the two sections 11 and 11 of FIG. 5.
  • the length of the straps can be different according to needs, for example it can progressively change in the direction of the air circulation, whereby the convection coefficient is modified depending on the air heating.
  • a grille for a heat exchanger having spaced parallel tubes for conveying a fluid heat transfer medium comprising an elongate member of heat conducting material having a generally zig-zag configuration to be disposed between two parallel tubes of an exchanger and including alternate angular and intermediate portions therebetween, the angular portions at the opposite sides of said grille constituting supporting areas for engagement with the respective tubes, and the intermediate portions having longitudinally extending slits dividing said portions into a plurality of side by side longitudinally extending straps which alternatively extend in opposite directions relative to the plans of said portions, the straps of adjacent intermediate portions being interleaved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
US94238A 1969-12-03 1970-12-01 Corrugated dissipator for tube and dissipator radiator core and process for manufacturing the same Expired - Lifetime US3695347A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR696941714A FR2069902B1 (enrdf_load_html_response) 1969-12-03 1969-12-03

Publications (1)

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US3695347A true US3695347A (en) 1972-10-03

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US94238A Expired - Lifetime US3695347A (en) 1969-12-03 1970-12-01 Corrugated dissipator for tube and dissipator radiator core and process for manufacturing the same

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US (1) US3695347A (enrdf_load_html_response)
JP (1) JPS503217B1 (enrdf_load_html_response)
BE (1) BE759255A (enrdf_load_html_response)
DE (1) DE2059593A1 (enrdf_load_html_response)
ES (2) ES386075A1 (enrdf_load_html_response)
FR (1) FR2069902B1 (enrdf_load_html_response)
GB (1) GB1326774A (enrdf_load_html_response)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071934A (en) * 1975-10-17 1978-02-07 Brazeway, Inc. CFT Box fin
US4141411A (en) * 1973-06-14 1979-02-27 Kalnin Igor M Tubular heat exchanger
US4365667A (en) * 1979-02-07 1982-12-28 Hitachi, Ltd. Heat exchanger
US5390731A (en) * 1994-06-29 1995-02-21 Ford Motor Company Heat exchanger fin
US6453987B1 (en) * 2001-10-19 2002-09-24 Chunyao Cheng Unitary heat-dissipating fin strip unit with straight strip portions and U-shaped strip portions
US20100024508A1 (en) * 2007-02-01 2010-02-04 Frank Opferkuch Tubes and method and apparatus for producing tubes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440235A1 (fr) * 1978-10-30 1980-05-30 Mesplier Pierre Poincons et matrices alternes permettant l'emboutissage et le cisaillage simultanes de plaques metalliques destinees a recevoir des tubes ronds ou oblongs. les tubes enfonces en force permettent d'obtenir un contact intime avec la plaque metallique pour realisation d'echangeurs
AU556955B2 (en) * 1981-09-09 1986-11-27 Mulock-Bentley, D. And Associates Pty. Ltd. Heat exchanger
US4488593A (en) * 1982-09-10 1984-12-18 D. Mulock-Bentley And Associates (Proprietary) Limited Heat exchanger
JP2006010200A (ja) * 2004-06-25 2006-01-12 Daikin Ind Ltd 熱交換器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899080A (en) * 1931-10-29 1933-02-28 Res & Dev Corp Heat exchange device
US2652233A (en) * 1951-01-02 1953-09-15 Fedders Quigan Corp Automotive type cellular radiator core
US3241610A (en) * 1961-10-16 1966-03-22 Peerless Of America Fin and tube stock assemblies for heat exchange units

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265127A (en) * 1963-10-21 1966-08-09 Ford Motor Co Heat exchange element

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899080A (en) * 1931-10-29 1933-02-28 Res & Dev Corp Heat exchange device
US2652233A (en) * 1951-01-02 1953-09-15 Fedders Quigan Corp Automotive type cellular radiator core
US3241610A (en) * 1961-10-16 1966-03-22 Peerless Of America Fin and tube stock assemblies for heat exchange units

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141411A (en) * 1973-06-14 1979-02-27 Kalnin Igor M Tubular heat exchanger
US4071934A (en) * 1975-10-17 1978-02-07 Brazeway, Inc. CFT Box fin
US4365667A (en) * 1979-02-07 1982-12-28 Hitachi, Ltd. Heat exchanger
US5390731A (en) * 1994-06-29 1995-02-21 Ford Motor Company Heat exchanger fin
US6453987B1 (en) * 2001-10-19 2002-09-24 Chunyao Cheng Unitary heat-dissipating fin strip unit with straight strip portions and U-shaped strip portions
US20100024508A1 (en) * 2007-02-01 2010-02-04 Frank Opferkuch Tubes and method and apparatus for producing tubes
US8561451B2 (en) * 2007-02-01 2013-10-22 Modine Manufacturing Company Tubes and method and apparatus for producing tubes

Also Published As

Publication number Publication date
BE759255A (fr) 1971-04-30
ES386075A1 (es) 1973-03-16
DE2059593A1 (de) 1971-06-09
FR2069902A1 (enrdf_load_html_response) 1971-09-10
JPS503217B1 (enrdf_load_html_response) 1975-02-01
ES194743Y (es) 1975-06-01
ES194743U (es) 1975-01-01
GB1326774A (en) 1973-08-15
FR2069902B1 (enrdf_load_html_response) 1974-03-01

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