EP0097612B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0097612B1
EP0097612B1 EP19830730057 EP83730057A EP0097612B1 EP 0097612 B1 EP0097612 B1 EP 0097612B1 EP 19830730057 EP19830730057 EP 19830730057 EP 83730057 A EP83730057 A EP 83730057A EP 0097612 B1 EP0097612 B1 EP 0097612B1
Authority
EP
European Patent Office
Prior art keywords
portions
needle
heat exchanger
end portions
flat
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
Application number
EP19830730057
Other languages
German (de)
French (fr)
Other versions
EP0097612A2 (en
EP0097612A3 (en
Inventor
Ryomyo Takasago Technical Institute Hamanaka
Michio Takasago Technical Institute Fujimoto
Yoshiaki Nagoya Technical Institute Aoki
Yoshinori Nagoya Technical Institute Watanabe
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP9146582U external-priority patent/JPS58194384U/en
Priority claimed from JP15901782U external-priority patent/JPS5965275U/en
Priority claimed from JP17331282U external-priority patent/JPS5976885U/en
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0097612A2 publication Critical patent/EP0097612A2/en
Publication of EP0097612A3 publication Critical patent/EP0097612A3/en
Application granted granted Critical
Publication of EP0097612B1 publication Critical patent/EP0097612B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F28D1/0478—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag the conduits having a non-circular cross-section
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • 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
    • F28F1/24—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 and extending transversely
    • F28F1/32—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 and extending transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings

Definitions

  • the present invention relates to a heat exchanger comprising a flat pipe for allowing a heat exchange medium to pass therethrough, said pipe, in cross-section, being meanderingly arranged so that its flat surfaces are parallel to each other at a predetermined interval, and a corrugated fin being arranged in a needle configuration in the space between said flat surfaces so as to be parallel to each other in the width direction of the flat pipe.
  • a heat exchanger of similar configuration is generally known from GB-A-1 218 635. Further opposite projecting end portions of the fins are known from EP-A-74 122.
  • Object of the invention is to provide a heat exchanger which can improve performance of heat transfer.
  • This object of the present invention can be achieved by a heat exchanger according to the above mentioned species, characterised in that needle portions of the corrugated fin are shaped into a circular form in cross-section between opposite end portions, whereas between said respective needle portions openings, at the curved portions of said end portions fin-free portions and between the needle portions and the opposite end portions bending portions are formed, so that respective adjacent needle portions are caused to alternately oppositely project from a standard plane.
  • a heat exchanger of the present invention makes use of an extruded flat pipe 1, by way of a heat transfer pipe, in which partition walls 1a are installed therein in its lengthwise direction, as in a conventional one.
  • the one extruded flat pipe 1 may be caused to meander so that its flat surfaces 1b may be confronted with each other at an interval and disposed in parallel, alternatively many extruded flat pipes 1 may be connected to each other with the interposition of headers.
  • a needle fin group In the spaces defined by the flat surfaces 1 b, there is secured a needle fin group in a manner normal to the lengthwise direction of the flat plate 1 by use of a brazing material or adhesive.
  • the heat exchanger illustrated in Figs. 1, 2 and 3 comprises a flat pipe in cross section and a corrugate fin 50 meanderingly arranged in a space defined by the flat surfaces 1b of the flat pipe 1.
  • a corrugate fin 50 meanderingly arranged in a space defined by the flat surfaces 1b of the flat pipe 1.
  • needle portions 50b are formed in a ladder-like form between opposite end portions 50a, 50a, and the respective needle portions 50b are shaped into a substantially circular form in cross section.
  • openings 50c between the respective needle portions 50b, there are formed openings 50c, and at the curved portions 50a' of the end portions 50a, there are formed fin-free portions 50d in order to facilitate the inflow and outflow of the air flow 4.
  • bending portions 50e are formed between the needle portions 50b and the opposite end portions 50a, 50a so that the respective adjacent needle portions 50b, 50b may be caused to alternately oppositely project by a predetermined distance from a plane comprising the opposite end portions 50a, 50a.
  • corrugate fins 50 are arranged so that they may be in parallel with each other in the width direction of the flat surfaces 1 b of the flat pipe 1, and the fin pitch of the needle portions 50b is P Ts ,
  • the needle portions 50b are caused to alternately project from the plane of the opposite end portions 50a, therefore the downstream needle portions 50b can efficiently be heat exchanged with the air flow 4, which improve the air-side heat transfer rate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

  • The present invention relates to a heat exchanger comprising a flat pipe for allowing a heat exchange medium to pass therethrough, said pipe, in cross-section, being meanderingly arranged so that its flat surfaces are parallel to each other at a predetermined interval, and a corrugated fin being arranged in a needle configuration in the space between said flat surfaces so as to be parallel to each other in the width direction of the flat pipe.
  • A heat exchanger of similar configuration is generally known from GB-A-1 218 635. Further opposite projecting end portions of the fins are known from EP-A-74 122.
  • It has been found that a heat exhanger of the above mentioned configuration has an unsatisfactory efficiency since that transfer is lowered due to uninformed flow velocity.
  • Object of the invention is to provide a heat exchanger which can improve performance of heat transfer.
  • This object of the present invention can be achieved by a heat exchanger according to the above mentioned species, caracterised in that needle portions of the corrugated fin are shaped into a circular form in cross-section between opposite end portions, whereas between said respective needle portions openings, at the curved portions of said end portions fin-free portions and between the needle portions and the opposite end portions bending portions are formed, so that respective adjacent needle portions are caused to alternately oppositely project from a standard plane.
  • An embodiment of the invention is shown in the drawings in which:
    • Fig. 1 is a partial cross-sectional view of the needle fins,
    • Fig. 2 is an enlarged perspective view of the needle fins and
    • Fig. 3 is a partial cross-sectional view of the heat exchanger.
  • A heat exchanger of the present invention makes use of an extruded flat pipe 1, by way of a heat transfer pipe, in which partition walls 1a are installed therein in its lengthwise direction, as in a conventional one. The one extruded flat pipe 1 may be caused to meander so that its flat surfaces 1b may be confronted with each other at an interval and disposed in parallel, alternatively many extruded flat pipes 1 may be connected to each other with the interposition of headers. In the spaces defined by the flat surfaces 1 b, there is secured a needle fin group in a manner normal to the lengthwise direction of the flat plate 1 by use of a brazing material or adhesive.
  • The heat exchanger illustrated in Figs. 1, 2 and 3 comprises a flat pipe in cross section and a corrugate fin 50 meanderingly arranged in a space defined by the flat surfaces 1b of the flat pipe 1. As shown in Fig. 2, in the case of this corrugate fin 50, needle portions 50b are formed in a ladder-like form between opposite end portions 50a, 50a, and the respective needle portions 50b are shaped into a substantially circular form in cross section. Further, between the respective needle portions 50b, there are formed openings 50c, and at the curved portions 50a' of the end portions 50a, there are formed fin-free portions 50d in order to facilitate the inflow and outflow of the air flow 4. Furthermore, bending portions 50e are formed between the needle portions 50b and the opposite end portions 50a, 50a so that the respective adjacent needle portions 50b, 50b may be caused to alternately oppositely project by a predetermined distance from a plane comprising the opposite end portions 50a, 50a.
  • The thus prepared corrugate fins 50 are arranged so that they may be in parallel with each other in the width direction of the flat surfaces 1 b of the flat pipe 1, and the fin pitch of the needle portions 50b is PTs,
  • According to the heat exchanger above, the needle portions 50b are caused to alternately project from the plane of the opposite end portions 50a, therefore the downstream needle portions 50b can efficiently be heat exchanged with the air flow 4, which improve the air-side heat transfer rate.

Claims (1)

  1. A heat exchanger comprising a flat pipe (1) for allowing a heat exchanger medium to pass therethrough, said pipe, in cross-section, being meanderingly arranged so that its flat surfaces (1b) are parallel to each other at a predetermined interval, and a corrugated fin (50) being arranged in a needle configuration in the space between said flat surfaces so ss to be parallel to each other in the width direction of the flat pipe, caracterised in that needle portions (50b) of the corrugated fin (50) are shaped into a circular form in cross-section between opposite end portions (50a), whereas between said respective needle portions (50b) openings (50c), at the curved portions (50a') of said end portions (50a) fin-free portions (50d) and between the needle portions (50b) and the opposite end portions (50a) bending portions (50e) are formed, so that respective adjacent needle portions (50b) are caused to alternately oppositely project from a standard plane.
EP19830730057 1982-06-21 1983-06-21 Heat exchanger Expired EP0097612B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP9146582U JPS58194384U (en) 1982-06-21 1982-06-21 Heat exchanger
JP91465/82 1982-06-21
JP15901782U JPS5965275U (en) 1982-10-22 1982-10-22 Heat exchanger
JP159017/82 1982-10-22
JP173312/82 1982-11-16
JP17331282U JPS5976885U (en) 1982-11-16 1982-11-16 Heat exchanger

Publications (3)

Publication Number Publication Date
EP0097612A2 EP0097612A2 (en) 1984-01-04
EP0097612A3 EP0097612A3 (en) 1985-01-23
EP0097612B1 true EP0097612B1 (en) 1988-08-10

Family

ID=27306751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830730057 Expired EP0097612B1 (en) 1982-06-21 1983-06-21 Heat exchanger

Country Status (4)

Country Link
EP (1) EP0097612B1 (en)
AU (1) AU1599483A (en)
CA (1) CA1230872A (en)
DE (1) DE3377666D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01111965U (en) * 1988-01-21 1989-07-27
US8177932B2 (en) 2009-02-27 2012-05-15 International Mezzo Technologies, Inc. Method for manufacturing a micro tube heat exchanger
DE102017217568A1 (en) * 2017-10-04 2019-04-04 Mahle International Gmbh Heat exchanger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH219262A (en) * 1939-08-28 1942-01-31 Ungarische Radiatoren Fabriks Lamella heat exchange device.
FR1119126A (en) * 1954-02-20 1956-06-15 Escher Wyss Ag Tube bundle for heat exchangers and method for its manufacture
FR1526316A (en) * 1967-04-14 1968-05-24 Chausson Usines Sa Improvements to secondary heat sinks for radiators and unit heaters
US3776015A (en) * 1970-12-01 1973-12-04 Chausson Usines Sa Process for manufacturing expanded and corrugated heat exchanger cores from metal strip material
AU556955B2 (en) * 1981-09-09 1986-11-27 Mulock-Bentley, D. And Associates Pty. Ltd. Heat exchanger

Also Published As

Publication number Publication date
EP0097612A2 (en) 1984-01-04
CA1230872A (en) 1987-12-29
EP0097612A3 (en) 1985-01-23
DE3377666T2 (en) 1988-09-15
AU1599483A (en) 1984-01-05
DE3377666D1 (en) 1988-09-15

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