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WO1997014927A1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

Info

Publication number
WO1997014927A1
WO1997014927A1 PCT/EP1996/004490 EP9604490W WO9714927A1 WO 1997014927 A1 WO1997014927 A1 WO 1997014927A1 EP 9604490 W EP9604490 W EP 9604490W WO 9714927 A1 WO9714927 A1 WO 9714927A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
heat exchanger
strips
strip
exchanger according
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.)
Ceased
Application number
PCT/EP1996/004490
Other languages
English (en)
Inventor
Bjørn VESTERGAARD
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.)
Yara Technology BV
Norsk Hydro Elektrisk Kvaelstof AS
Original Assignee
Norsk Hydro Technology BV
Norsk Hydro Elektrisk Kvaelstof AS
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 Norsk Hydro Technology BV, Norsk Hydro Elektrisk Kvaelstof AS filed Critical Norsk Hydro Technology BV
Priority to AU72937/96A priority Critical patent/AU7293796A/en
Publication of WO1997014927A1 publication Critical patent/WO1997014927A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F28F1/24—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
    • 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
    • F28F2215/00—Fins
    • F28F2215/12—Fins with U-shaped slots for laterally inserting conduits

Definitions

  • the invention relates to a heat exchanger including a number of strips stacked adjacent one another in parallel relationship to provide air passages, and at least one flat tube for carrying a fluid, said tube or tubes passing through holes in the strips and being fitted in the holes in heat exchange relationship with the strips.
  • Such a heat exchanger is known from US - A - 4 428 419.
  • a number of flat tubes is passing through a number of holes provided in the strips. Each tube being fitted within one hole and being completely surrounded by the edges of that hole.
  • the tubes can be used for a fluid fiow passing in parallel through all the tubes at the same time. Otherwise it is possible to make the right connections between the ends of the individual tubes in order to provide one or more flows in series.
  • each individual tube must be connected to a manifold or header system after the fins and tubes have been assembled into a heat exchanger core.
  • the connections to headers/Manifolds or other coupling systems are normally done by brazing or soldering, a process that may give reduced contact between the fins and the tubes in the heated zones.
  • it is a costly procedure that may require the use of a brazing furnace, an operation that also may change the surface properties of the fins.
  • Another type of heat exchanger is known from US - A - 5 372 188. In this unit, the fins are of a zig-zag type inserted as strips between the flat tubes. The assembly and joining of this type of heat exchanger is done by brazing of the complete heat exchanger in a special process. This involves a costly production line which is not suitable for small-scale production.
  • each tube is zigzag folded so as to have a number of rectilinear sections interconnected by bent portions or headers.
  • These connection to the headers can be made by simple flame brazing or by adhesive bonding before the fins are inserted. Since the strips are not present during the assembly of tubes and headers, it is easy to gain access to the joints for brazing/soldering or gluing.
  • each strip is provided with holes with such dimension that each opening fits around two sections of the same tube.
  • each strip is provided with elongated holes with such dimension that each hole fits around one section of the tube.
  • each elongated hole has a slot-like shape with an open end at one end of the strip.
  • each tube comprising rectilinear sections and bent portions can easily be fitted to the strips by inserting the same through the open ends of the slot-like holes.
  • Fig. 1 a front view, partly in cross-section of a heat exchanger according to the invention
  • Fig. 2 a side view of the heat exchanger of Fig. 1
  • Fig. 3 a cross-section, on enlarged scale, according to the line Ill-Ill in Fig.
  • Fig. 4 a perspective view of the heat exchanger of Fig. 1 before assembling
  • Fig. 5 a cross-section, as in Fig. 3 of a modified embodiment of the heat exchanger according to the invention.
  • FIG. 6a and 6b cross-section corresponding to the cross-section of fig. 3 of a conventional heat exchanger and a heat exchanger according to the invention.
  • Fig. 7 a schematic representation of the heat flow in a heat exchanger having tubes and strips.
  • Fig. 8 a cross-section corresponding to the cross-section of Fig. 3 of a modified form of the invention.
  • the heat exchanger 1 comprises a number of strips 2, which in the embodiment shown each consists of a rectangular plate made of a material with good heat conducting properties such as aluminium or aluminium alloys.
  • the strips 2 are positioned in a parallel way with respect to each other thereby forming a cooling pack.
  • the strips can be of a plain type or can have enhancements such as corrugations, louvers, etc.
  • Each strip 2 is provided with a number of openings or holes 3 which in the
  • 80 embodiment shown have an elongated form, and are open ended to one side so as to form cut-outs in the strip 2, as shown in Figs 1 and 3.
  • a flat tube 4 is inserted in the openings 3 of the cooling pack, the flat tube 4 being bent in a serpentine way and as such is composed of a number of rectilinear sections 5 and bent portions 6. Otherwise the tube may be cut in a
  • the flat tube is preferably of the type obtained by multiple port extrusion, i.e. a flat tube having a number of parallel internal flowing channels 10 (see Fig. 3); for , a fluid (liquid or two phase mixture) separated by innerwalls 11 , the outer wails of such tube being formed by two parallel flat walls 13 and 14 interconnected by
  • Such a tube may be produced by a single step extrusion process by using especially adapted extrusion dies.
  • the main advantage of such flat tubes is that the heat exchange surface is much greater compared with traditional round tubes, so that heat exchangers based upon this type of tubes are more effective.
  • the slots 3 in the fin stock have a slightly tapered form, so that the finstock can more easily be positioned over the tubes 4. In order to improve the stability and to improve the thermal contact adhesives may be used between the fins and the tube.
  • FIG. 4 A piece of flat tube 4 is for instance folded in a serpentine 110 shape i.e. a construction comprising a number of rectilinear portions 5 interconnected by bent portion 6.
  • the rectilinear portions are parallel to each other and the distance between the facing outer walls of two adjacent rectilinear portions is equal to the smallest distance between two adjacent openings 3 in the strips 2.
  • the heat exchanger of the embodiment shown has parallel rectilinear sections of tubes it is possible, according to the invention, to use non-parallel . rectilinear sections.
  • the strips are to be provided with openings which are not located on the same place in each strip, but the position of the opening is gradually changing from one strip to another. It is even possible to
  • 125 have a tube with not completely rectilinear sections, but with e.g. undulated sections between two bent portions 6. Basically it is even possible to have random configuration, provided the openings 3 in the strips are made accordingly.
  • spacers are normally provided between the 130 strips of the fin stock. These spacers may be removed after assembly. Such spacers will make the fin stock more rigid, support the slotted portion of the finstock and facilitate assembly. They also will position the fins at this right location along the tube.
  • Each strip 3 is 135 provided with a number of substantially rectangular openings 24 with four rounded corners 25.
  • One dimension of the opening 24 corresponds to the width of the flat tube 4 to be used in connection with this strip 2.
  • the other dimension is substantially bigger than the height of the tube 5. In fact that dimension is substantially equal to the distance between two non-facing walls of two adjacent
  • FIG. 8 there is shown a modified shape of a tube which can be used in the heat exchanger according to the invention.
  • a tube 41 has a tapered corss-sectio ⁇ and the cut-outs or opening 42 in the strips 2 have a corresponding shape, so that the tube 41 can be easily inserted into the cut-out and pushed further until a 150 good connection between tube 41 and strip is obtained.
  • Such a tapered tube 41 can be produced either directly as extruded or extruded with parallel sides with subsequent wedge-rolling .
  • the foliar of the cut-out 42 is designed in such a way that an elastic adjustment within the geometrical tolerances of tube and strip is possible.
  • a traditional heat exchanger has a configuration as shown in fig. 6A, whereas the heat exchanger according to the invention has the configuration according to fig.
  • the heat flow is from Block 80, which represents the 185 refrigerant to block 81 representing the tubing. From block 81 (the tubing) the heat transfer flow goes either directly to block 82 representing the ambient art, or through block 83 representing the stripes.
  • the different flows are indicated as 91 , 92, 93 and 94 respectively.

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)

Abstract

Cet échangeur de chaleur présente un certain nombre de bandes empilées, adjacentes les unes aux autres parallèlement, afin de constituer des passages à air, ainsi qu'au moins un tube plat servant à transporter un fluide. Chaque tube passe à travers des trous ménagés dans les bandes, est ajusté dans ceux-ci pour que s'effectue l'échange de chaleur avec les bandes et est plié en zigzag de manière à présenter un certain nombre de sections rectilignes reliées entre elles par des portions pliées.
PCT/EP1996/004490 1995-10-17 1996-10-16 Echangeur de chaleur Ceased WO1997014927A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU72937/96A AU7293796A (en) 1995-10-17 1996-10-16 Heat exchanger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP95202797.7 1995-10-17
EP95202797A EP0769669A1 (fr) 1995-10-17 1995-10-17 Echangeur de chaleur

Publications (1)

Publication Number Publication Date
WO1997014927A1 true WO1997014927A1 (fr) 1997-04-24

Family

ID=8220725

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/004490 Ceased WO1997014927A1 (fr) 1995-10-17 1996-10-16 Echangeur de chaleur

Country Status (3)

Country Link
EP (1) EP0769669A1 (fr)
AU (1) AU7293796A (fr)
WO (1) WO1997014927A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000019162A1 (fr) 1998-09-30 2000-04-06 Norsk Hydro Asa Ailette d'echangeur de chaleur
JPWO2015041216A1 (ja) * 2013-09-20 2017-03-02 三菱電機株式会社 熱交換器、その熱交換器を用いた空気調和装置、及びその熱交換器の製造方法
JP2017129302A (ja) * 2016-01-19 2017-07-27 株式会社Uacj 熱交換器及びその製造方法
JP2023075587A (ja) * 2021-11-19 2023-05-31 三星電子株式会社 熱交換器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006037302A1 (de) * 2006-08-08 2008-02-14 Behr Gmbh & Co. Kg Wärmetauscher, insbesondere für eine Kraftfahrzeug-Klimaanlage
CN102089602B (zh) * 2008-07-07 2012-12-05 阿塞里克股份有限公司 蒸发器
EP2657637A4 (fr) * 2011-01-21 2014-07-09 Daikin Ind Ltd Échangeur de chaleur et climatiseur
CN103314267B (zh) 2011-01-21 2015-09-30 大金工业株式会社 热交换器及空调机
FR3111417B1 (fr) 2020-06-11 2022-07-29 Calopor Appareil de réfrigération avec dispositif de retrait de chaleur statique monobloc

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532301A (en) * 1945-11-29 1950-12-05 Mccord Corp Condenser
FR1022039A (fr) * 1950-07-13 1953-02-26 Leon Daum & Cie Formes d'ailettes pour condenseurs et procédés de mise en place
DE2605262A1 (de) * 1976-02-11 1977-08-18 Benteler Werke Ag Lamellenwaermetauscher aus durchgehendem metallband
JPS62166294A (ja) * 1986-01-16 1987-07-22 Nippon Denso Co Ltd 熱交換器
US4842185A (en) * 1986-04-25 1989-06-27 Mitsubishi Aluminum Co., Ltd. Method of brazing a heat exchanger using a reaction flux
JPH02154987A (ja) * 1988-12-06 1990-06-14 Matsushita Refrig Co Ltd フィン付熱交換器
JPH04177091A (ja) * 1990-11-08 1992-06-24 Toshiba Corp 熱交換器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU960522A2 (ru) 1980-01-28 1982-09-23 Предприятие П/Я А-1697 Трубчато-пластинчатый теплообменник

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532301A (en) * 1945-11-29 1950-12-05 Mccord Corp Condenser
FR1022039A (fr) * 1950-07-13 1953-02-26 Leon Daum & Cie Formes d'ailettes pour condenseurs et procédés de mise en place
DE2605262A1 (de) * 1976-02-11 1977-08-18 Benteler Werke Ag Lamellenwaermetauscher aus durchgehendem metallband
JPS62166294A (ja) * 1986-01-16 1987-07-22 Nippon Denso Co Ltd 熱交換器
US4842185A (en) * 1986-04-25 1989-06-27 Mitsubishi Aluminum Co., Ltd. Method of brazing a heat exchanger using a reaction flux
JPH02154987A (ja) * 1988-12-06 1990-06-14 Matsushita Refrig Co Ltd フィン付熱交換器
JPH04177091A (ja) * 1990-11-08 1992-06-24 Toshiba Corp 熱交換器

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 001 (M - 656) 6 January 1988 (1988-01-06) *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 404 (M - 1018) 31 August 1990 (1990-08-31) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 487 (M - 1323) 9 October 1992 (1992-10-09) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000019162A1 (fr) 1998-09-30 2000-04-06 Norsk Hydro Asa Ailette d'echangeur de chaleur
JPWO2015041216A1 (ja) * 2013-09-20 2017-03-02 三菱電機株式会社 熱交換器、その熱交換器を用いた空気調和装置、及びその熱交換器の製造方法
JP2017129302A (ja) * 2016-01-19 2017-07-27 株式会社Uacj 熱交換器及びその製造方法
JP2023075587A (ja) * 2021-11-19 2023-05-31 三星電子株式会社 熱交換器

Also Published As

Publication number Publication date
AU7293796A (en) 1997-05-07
EP0769669A1 (fr) 1997-04-23

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