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US20170067694A1 - Flat tube for heat exchanger - Google Patents

Flat tube for heat exchanger Download PDF

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Publication number
US20170067694A1
US20170067694A1 US15/308,855 US201515308855A US2017067694A1 US 20170067694 A1 US20170067694 A1 US 20170067694A1 US 201515308855 A US201515308855 A US 201515308855A US 2017067694 A1 US2017067694 A1 US 2017067694A1
Authority
US
United States
Prior art keywords
tube
fin
walls
section
heat exchanger
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.)
Abandoned
Application number
US15/308,855
Other languages
English (en)
Inventor
Erwan Etienne
Patrick Boisselle
Samuel Bry
Jean-Philippe Berthome
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.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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
Application filed by Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Assigned to VALEO SYSTEMES THERMIQUES reassignment VALEO SYSTEMES THERMIQUES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BERTHOME, JEAN-PHILIPPE, BOISSELLE, PATRICK, BRY, Samuel, ETIENNE, Erwan
Publication of US20170067694A1 publication Critical patent/US20170067694A1/en
Abandoned legal-status Critical Current

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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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • 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
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements

Definitions

  • the present invention relates to the technical field of motor vehicle heat exchangers and relates more specifically to a tube for a heat exchanger of this kind.
  • the exchanger tubes concerned are so-called “flat” tubes intended to pass through the openings in a plurality of fins of the heat exchanger.
  • the tubes are shaped in the heat exchanger by expansion, so that they are pressed against the edges of the openings in the fins.
  • a tube of the kind referred to is already known from document FR 2 722 563, said tube exhibiting an oblong cross section which is substantially equivalent to that of an opening in a fin.
  • a tube of this kind comprises two longitudinal walls facing one another which are curved and exhibit a concave portion (in other words, a portion having a convexity turned towards the inside of the tube), even though the tube has a restricted outer width in a region in which the longitudinal walls are closest one to the other.
  • This kind of particularly flat tube is therefore adapted to be located in a small-size heat exchanger.
  • Tubes of this kind are subject to an elastic spring back of their walls after shaping in the openings of the fins. This elastic springback of the walls of the tube creates play between the walls and the openings in the fins which results in a reduction in heat conductance between the tube and the fins.
  • the particular aim of the present invention is to overcome the aforementioned problems by proposing a heat exchanger tube, the thermal efficiency of which is improved.
  • the object of the invention is a tube for a motor vehicle heat exchanger exhibiting a cross section comprising two opposite longitudinal walls, each wall being provided with at least two concave portions.
  • a particularly flat tube which exhibits dimensions adapted to be fitted in a small-size heat exchanger, while eliminating the cohesion problems between the walls of the tube and the opening in the fin.
  • this particular tube shape allows an elastic springback of the walls of the tube to be avoided following its shaping by expansion.
  • the sides of the tube remain pressed against the edges of the opening and prevent the problem of play emerging between the openings in the fins and the walls of the tube.
  • the conductance of heat between the fins and the tube is therefore optimized, which thereby improves the thermal efficiency of the exchanger.
  • the tube as defined above may, moreover, comprise one or more of the following characteristics, either alone or in combination.
  • the two concave portions are separated by a convex portion.
  • a shape of this kind should be understood in the broadest sense, in other words without the convex portion having to have a particular shape.
  • the convex portion is of such a size that the internal perimeter of the section has a value that is at least 2% greater than the section of a tube in which the walls are straight.
  • the convex portion allows the internal perimeter of the tube, also referred to as the wetted perimeter, to be increased by a value of 2% in respect of a tube that does not exhibit any convexity, the result of this being an increase in the tube's heat exchange performance.
  • the walls of the tube are connected to one another by sections which are substantially circular or even oval in shape.
  • a length L Tube denotes the greatest distance between the sections with a substantially circular shape on the outside of the tube
  • a width I Tube denotes the smallest distance between the two walls of the tube on the outside of the tube
  • a flatness ratio T f of the tube is defined by the relationship:
  • Another object of the invention is a fin comprising at least one substantially oblong opening which comprises an edge provided with two opposite longitudinal walls, each one provided with at least two convex portions.
  • the specific shape of a fin of this kind is particularly appropriate for avoiding an elastic springback of the walls of the tube following shaping in an opening in the fin.
  • FIG. 1 is a sectional view of a tube according to the invention
  • FIG. 2 is an elevation of a portion of a fin intended to receive a tube in FIG. 1 .
  • a tube 10 according to the invention is depicted prior to its shaping by deformation.
  • Said tube exhibits a substantially oblong cross section comprising longitudinal walls 12 facing one another, each wall being provided with at least two concave portions 14 .
  • the tube 10 comprises two hollow forms 14 which are substantially curved.
  • each longitudinal wall 12 is connected to one another by two end sections 16 which are circular in shape.
  • a convex portion 18 is arranged between the two concave portions 14 of each longitudinal wall 12 .
  • each wall 12 of the tube exhibits a raised section arranged between the two hollow shapes 14 .
  • the tube 10 is produced from a metal alloy adapted to be easily deformed and has a wall with a substantially constant thickness e.
  • the tube has a length L Tube denoting the greatest distance separating the two end sections 16 which are substantially circular in shape on the outside of the tube and a width I Tube denoting the shortest distance between the two walls 12 of the tube on the outside of the tube.
  • a flatness ratio T f of the tube can be defined by the relationship:
  • a fin 20 which is generally rectangular in shape comprises a plurality of holes 22 disposed in a row along axis N.
  • the holes 22 in a fin 20 are separated in twos by louvered rows 24 well known to the person skilled in the art, the function of which is to increase the heat exchange of the fins 20 .
  • Each opening 22 exhibits a cross section which is substantially oblong in shape, comprising two longitudinal edges 26 facing one another, each edge 26 being provided with at least two convex portions 28 .
  • the two convex portions 28 of an edge 26 of the opening 22 are separated by a concave portion 30 .
  • each longitudinal edge exhibits one hollow section and two raised sections.
  • Each opening 22 in a fin 20 therefore has a shape that is substantially identical to that of a tube 10 , but its dimensions are smaller, in order to allow the tube to be threaded inside the opening 22 prior to shaping.
  • each opening is configured to receive a tube as previously described, in such a manner that an assembly formed by an opening provided with a tube exhibits play J between the tube and the receiving opening that matches it.
  • a method of shaping a tube 10 according to the invention in a plurality of fins 20 of a heat exchanger In a first stage, the tube 10 is positioned in an opening 22 of at least one fin 20 , in such a manner that the tube 10 is positioned to create play J between the tube and the opening, said play J not having a consistent value over the entire periphery of the tube. The tube is then made to press against the inside of the opening 22 in the fin due to the expansion of its walls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US15/308,855 2014-05-05 2015-05-05 Flat tube for heat exchanger Abandoned US20170067694A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1454043 2014-05-05
FR1454043A FR3020670B1 (fr) 2014-05-05 2014-05-05 Tube plat pour echangeur de chaleur
PCT/EP2015/059867 WO2015169808A1 (fr) 2014-05-05 2015-05-05 Tube plat pour échangeur de chaleur

Publications (1)

Publication Number Publication Date
US20170067694A1 true US20170067694A1 (en) 2017-03-09

Family

ID=51293096

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/308,855 Abandoned US20170067694A1 (en) 2014-05-05 2015-05-05 Flat tube for heat exchanger

Country Status (8)

Country Link
US (1) US20170067694A1 (fr)
EP (1) EP3140603A1 (fr)
JP (1) JP2017515087A (fr)
KR (1) KR20160145138A (fr)
CN (1) CN106461349A (fr)
FR (1) FR3020670B1 (fr)
MX (1) MX2016014498A (fr)
WO (1) WO2015169808A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105444470B (zh) * 2015-12-24 2017-12-05 潍柴动力股份有限公司 一种汽车空调蒸发器
CN109210964A (zh) * 2018-09-30 2019-01-15 珠海格力电器股份有限公司 一种热交换器及包含其的空调
CN109186302B (zh) * 2018-09-30 2024-05-03 珠海格力电器股份有限公司 一种翅片及具有其的热交换器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1412862A (en) * 1919-11-01 1922-04-18 Habib Vita Radiator
US1502301A (en) * 1922-09-06 1924-07-22 Fedders Mfg Co Inc Radiator
US3771595A (en) * 1971-09-22 1973-11-13 Modine Mfg Co Heat exchange device
US4715432A (en) * 1984-05-26 1987-12-29 Gea Luftkuehlergesellschaft Happel Gmbh & Co. Air-cooled tube condenser
US5692559A (en) * 1995-05-29 1997-12-02 Long Manufacturing Ltd. Plate heat exchanger with improved undulating passageway
US6170565B1 (en) * 1996-12-04 2001-01-09 Zexel Corporation Heat exchanger
US20040211056A1 (en) * 2003-02-20 2004-10-28 Mitsubishi Denki Kabushiki Kaisha Heat exchanger tube expanding apparatus
FR2909912A1 (fr) * 2006-12-14 2008-06-20 Valeo Systemes Thermiques Procede de realisation d'une ailette pour echangeur de chaleur, ailette obtenue par un tel procede et echangeur de chaleur comportant une telle ailette

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402850A1 (fr) * 1977-09-09 1979-04-06 Ferodo Sa Dispositif de tube a ailettes pour echangeur de chaleur, notamment pour radiateur de vehicule automobile, et son procede de fabrication
JPS59134771U (ja) * 1983-02-23 1984-09-08 カルソニックカンセイ株式会社 プレ−トフイン型熱交換器のチユ−ブ取付構造
CN85104424B (zh) * 1985-06-11 1988-10-12 Gea空冷设备哈佩尔有限公司 空气冷却式表面冷凝器
FR2611034A1 (fr) * 1987-02-12 1988-08-19 Jean Buffet Conduit d'echangeur a paroi deformable, et echangeur realise avec de tels conduits
JP2002340490A (ja) * 2001-05-18 2002-11-27 Denso Corp 熱交換器
KR100906769B1 (ko) * 2002-01-31 2009-07-10 한라공조주식회사 오뚜기형 유로를 갖는 열교환기용 튜브 및 이를 이용한열교환기
JP2010255918A (ja) * 2009-04-24 2010-11-11 Daikin Ind Ltd 空気熱交換器
JP5850693B2 (ja) * 2011-10-05 2016-02-03 日野自動車株式会社 熱交換器用チューブ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1412862A (en) * 1919-11-01 1922-04-18 Habib Vita Radiator
US1502301A (en) * 1922-09-06 1924-07-22 Fedders Mfg Co Inc Radiator
US3771595A (en) * 1971-09-22 1973-11-13 Modine Mfg Co Heat exchange device
US4715432A (en) * 1984-05-26 1987-12-29 Gea Luftkuehlergesellschaft Happel Gmbh & Co. Air-cooled tube condenser
US5692559A (en) * 1995-05-29 1997-12-02 Long Manufacturing Ltd. Plate heat exchanger with improved undulating passageway
US6170565B1 (en) * 1996-12-04 2001-01-09 Zexel Corporation Heat exchanger
US20040211056A1 (en) * 2003-02-20 2004-10-28 Mitsubishi Denki Kabushiki Kaisha Heat exchanger tube expanding apparatus
FR2909912A1 (fr) * 2006-12-14 2008-06-20 Valeo Systemes Thermiques Procede de realisation d'une ailette pour echangeur de chaleur, ailette obtenue par un tel procede et echangeur de chaleur comportant une telle ailette

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Machine Translation FR 2909912 A1 *

Also Published As

Publication number Publication date
WO2015169808A1 (fr) 2015-11-12
KR20160145138A (ko) 2016-12-19
FR3020670A1 (fr) 2015-11-06
CN106461349A (zh) 2017-02-22
JP2017515087A (ja) 2017-06-08
EP3140603A1 (fr) 2017-03-15
FR3020670B1 (fr) 2019-03-22
MX2016014498A (es) 2017-05-23

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