WO2000019162A1 - Ailette d'echangeur de chaleur - Google Patents

Ailette d'echangeur de chaleur Download PDF

Info

Publication number
WO2000019162A1
WO2000019162A1 PCT/EP1998/006246 EP9806246W WO0019162A1 WO 2000019162 A1 WO2000019162 A1 WO 2000019162A1 EP 9806246 W EP9806246 W EP 9806246W WO 0019162 A1 WO0019162 A1 WO 0019162A1
Authority
WO
WIPO (PCT)
Prior art keywords
holes
tubes
strip
strip portions
heat exchanger
Prior art date
Application number
PCT/EP1998/006246
Other languages
English (en)
Inventor
Bjarne Arvid Espedal
Original Assignee
Norsk Hydro Asa
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 Asa filed Critical Norsk Hydro Asa
Priority to AU10286/99A priority Critical patent/AU1028699A/en
Priority to PCT/EP1998/006246 priority patent/WO2000019162A1/fr
Publication of WO2000019162A1 publication Critical patent/WO2000019162A1/fr

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
    • 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
    • F28F1/30—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 being attachable to the element

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 a number of tubes for carrying a fluid, said tubes passing through holes in the strips and being fitted in the holes in heat exchanging relationship with the strips.
  • Aluminum offers additional tube shapes beyond the conventional round tube.
  • the most promising design flexibility for compact heat exchangers are linked to multi-port extruded tubes.
  • MPE- tube concept is presently linked to brazing technology for the whole unit including investment of fairly expensive furnace equipment. This type of industry are also confronted with environmental issues.
  • the heat exchanger concept presented here have the main advantage of utilizing mechanical assembling technology only utilizing flame brazing for header/ manifold. Thereby would this method represent a significant improvement with respect to cost and be a more environmental friendly process. Compared to conventional mechanical methods utilizing tube expansion technics which need some level of lubrication, this concept do not need any lubrication of the parts included in the assembled heat exchanger unit.
  • MPE tubes are applied in both se ⁇ entine and parallel flow (PF) heat exchanger concepts.
  • the concept presented here is applicable to both heat exchanger designs mentioned.
  • the most efficient concept for MPE tubes are linked to PF technology due to the very small flow cross section of the individual tubes.
  • the concept presented here is also especially aware of solutions aiming for design flexibility for this type of concept.
  • This document present a method based on inserting tubes into a fin-stack with slightly trapezoidal shape in such a way that tubes are gradually pushed into a good contact towards the fin.
  • Fig. 1 is a schematic representation of the method for mounting a number of tubes in strips according to the invention
  • Fig. 2 is a schematic representation of an assembled heat exchanger according to the invention
  • Fig. 3 is a schematic representation of a modified embodiment of an assembled heat exchanger according to the invention.
  • Fig.4 is a schematic representation of a heat exchanger according to the invention which is modified into a two-row system
  • Fig. 5 is a schematic representation of a heat exchanger according to the invention which is modified into a multi-row system.
  • Fig. 1 there are shown a number of tubes 1 , in a schematic cross section to be used as heat exchanging tubes in a heat exchanger.
  • these tubes have the shape of a so-called flat tube, but within the concept of the invention it is possible to use other types of tubes such as flat oval tube, flat multiple-port extruded tubes, or even round tubes.
  • each strip is in fact composed out of two strip portions 3 and 4, which after assembling will form together substantially one strip. Both strip portions 3 and 4 have a rectangular shape, but other shapes are possible as well.
  • strip portion 3 there is a number of holes 5, which in this case have an elongated shape ending in one of the longitudinal edges 6 of the strip portion 3.
  • the dimensions and shape of the holes 5 are chosen in such a way that the shape of a hole 5 corresponds to a substantial portion of the outer shape of the tube 1 , but with somewhat smaller dimensions, which means the tube 1 can only be accommodated into the hole 5 by a press-fit, i.e. the edges of the hole 5 need to be deformed slightly in order to have the tube 1 inserted in the hole 5.
  • the depth of hole 5 as measured from edge 6 is nearly equal to the biggest dimension of the tube 1 , thereby ensuring a good hold of the tube after insertion into the hole.
  • the hole 5 may have a depth about equal to half the biggest dimension of the tube.
  • the strip portion 4 is also provided with holes 8 ending in one of the longitudinal edges 9 of the strip portion 4.
  • these holes 8 have a semi-circular-like shape, with the biggest dimension in line with the edge 9. But other shapes are possible as will be discussed below.
  • a number of strip portions 6 is positioned in a parallel relationship, preferably with fixed distances between neighbouring strip portions 5 the edges 6 being all located in one plane.
  • This pack of strips is bent slightly around an axis which is pe ⁇ endicular to the surface of the strip portion 3 in such a way that open ends of the holes 5 are widened slightly so that the holes 5 will have a trapezium-like opening as shown in dotted lines in Fig. 1.
  • a number of tubes 1 is also positioned in a parallel relationship to each other in such a way that a pack of tubes 1 can be inserted into the widened holes 5 in one movement.
  • a stack is made of a number of parallel strip portions 4 with all their edges 9 in one plane. This stack is pushed on the free end of the tubes 1 already positioned in the holes 5 such that every strip portion 3 is positioned in line with a strip portion 4. In this way the strip portions 4 are fixed to the ends of the tubes 1 by means of a press-fit ensuring sufficient holding forces to keep the strip portions 4 in position.
  • a heat exchanger unit has been obtained as schematically shown in Fig. 2.
  • a small gap which can be used for draining off condensation water or the like if air is used as fluid at the outside part of the tubes 5.
  • this gap is increasing the turbulence of the flow of the fluid outside of the tubes 1 , thereby increasing the heat exchanging efficiency.
  • clamping means may be provided to keep the strip portions 3 and 4 together. Clamping, e.g. by means of side plates might be useful as well in order to ensure the return to the original shape of the strip portions after bending, and to stabilize the final configuration. This might be needed in applications where the heat exchanger is subject to vibrations.
  • the configuration shown in fig. 2 was used as a practical example using multiple port extruded tubes of 20 X 6 mm. Four tubes were used in parallel, at a distance of 25 mm between two neighbouring tubes, resulting in a strip length of 125 mm (4 X 25 mm + 25 mm). The width of the strip portion 3 being 20mm and of strip portion 4 being 11mm. The depth of hole 5 was 14mm and of hole 8 was 5mm leaving a web of 6 mm between the hole 5 and 8 and the respective outer edges. In order to get a smooth insertion of tubes, an increase of the hole opening close to 0,5 mm would be needed. This could be achieved by a bending radius of 1375 mm which would result in a strain as low as 0,44 % at the bottom of the holes 5.
  • the holes 8 have a semi-circular-shape, but other shapes can be used as well, especially if a bending of the strip portion 5 is used to press the strip portion 4 on the tube ends.
  • a preferred shape is the rounded shape, e.g. semi-circular as shown, as this is easier to manufacture and ensure good contact forces, without the risk of overstress in the otherwise present corners, but other shapes, such as trapezium-shape are possible as well.
  • tubes are used having a different cross-section, such a round or flat oval tubes, it is needed to use two nearly identical strip portions 3 and 4 as each strip portion has to accommodate approximately half of the tube circumference. In these circumstances it is useful to use bending of the strip portions for the assembling of the heat exchanger, and additional connecting means might be needed in order to keep the strip portions together.
  • each strip is composed of two strip portions 13 and 14 which might be completely identical, dependent upon the ultimate configuration of the heat exchanger.
  • a number of holes 15, 19 and 16, 18 has been provided the holes 15 and 16 having a big depth and the holes 18, 19 a small depth, so that after assembling a staggered relationship between the tubes 11 is obtained.
  • assembling this type of heat exchanger requires the bending of each strip portion 13 and 14. If two rows of heat-exchanging tubes are required in order to have the required heat exchanging capacity, the embodiment of fig. 4 can be used.
  • each strip is composed of three strip portions 23, 24 and 25.
  • strip portions 23 and 25 are identical, and each is provided with a number of holes 26 or 27 having a big depth.
  • Strip portion 24 has a rectangular shape and its two parallel longitudinal edges are provided with holes 28 having a small depth, comparable to the holes 8 in fig. 1. Assembling this type of heat exchanger can be done by bending the strip portion 23 and inserting a first set of tubes 21 , bending the strip portion 25 and inserting a second set of tubes 22, whereupon both set of tubes are pressed in the holes 28 of the strip portion 24.
  • each strip is composed of a number of strip portions 35, 36, 38, 39 and 40.
  • Strip portion 35 has been provided with a number of holes 45 having a big depth, where the subsequent strip portions 36 and 38 are identical and are provided with one series of holes 47, 48 having a big depth and another series of holes 46, having a small depth.
  • Strip portion 39 has been provided with two series of holes 49, 50 having a small depth and at last strip portion 40 has been provided with one series of holes 51 having a big depth.
  • Assembling the heat exchanger is started with bending a stack of strip portions 35 and inserting a set of tubes 55. Subsequently a set tubes 56 is inserted in a bended stack of strip portions 36, and after releasing the bending forces, the two strip portions 35 and 36 are pressed together, thereby fixing the set of tubes 55 into the holes 46. This process is repeated until the strip portion 38 has been added to the already assembled strip portions. As a next step a set of tubes 58 is inserted into the holes 51 with bending a stack of strip portions 40, and after releasing the bending forces the strip portions 40 and the already assembled strip portions 35, 36, 38 are pressed towards the strip portions 39 whereby the tubes 48 and 58 are pressed into the holes 49 and 50 respectively.

Landscapes

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

Abstract

Cet échangeur de chaleur comporte un certain nombre de lames empilées, adjacentes les unes aux autres en parallèle, ainsi qu'un certain nombre de tubes transportant un fluide. Ces tubes (1) passent par des trous ménagés dans les lames et sont emmanchés dans ces trous de manière que s'effectue l'échange de chaleur avec les lames. Chaque lame se compose d'au moins deux éléments (3, 4) se trouvant sur un même plan, et chaque élément comporte un certain nombre de trous (5, 8) se terminant sur le bord (6, 9) faisant face à un bord parallèle (6, 9) de l'autre élément de lame correspondant (3, 4), les trous se trouvant dans chaque paire d'éléments de lame étant alignés de manière à recevoir les tubes (1).
PCT/EP1998/006246 1998-09-30 1998-09-30 Ailette d'echangeur de chaleur WO2000019162A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU10286/99A AU1028699A (en) 1998-09-30 1998-09-30 Heat exchanger fin
PCT/EP1998/006246 WO2000019162A1 (fr) 1998-09-30 1998-09-30 Ailette d'echangeur de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1998/006246 WO2000019162A1 (fr) 1998-09-30 1998-09-30 Ailette d'echangeur de chaleur

Publications (1)

Publication Number Publication Date
WO2000019162A1 true WO2000019162A1 (fr) 2000-04-06

Family

ID=8167083

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/006246 WO2000019162A1 (fr) 1998-09-30 1998-09-30 Ailette d'echangeur de chaleur

Country Status (2)

Country Link
AU (1) AU1028699A (fr)
WO (1) WO2000019162A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2375164A (en) * 2001-05-04 2002-11-06 Llanelli Radiators Ltd Heat exchanger system
WO2007028462A1 (fr) * 2005-09-02 2007-03-15 Behr Gmbh & Co. Kg Echangeur de chaleur assemble mecaniquement
FR3053108A1 (fr) * 2016-06-27 2017-12-29 Valeo Systemes Thermiques Echangeur de chaleur ameliore evitant les defauts de contact entre tubes et ailettes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB359102A (en) * 1930-08-15 1931-10-22 Serck Radiators Ltd Improvements in or relating to cooling and heating radiators
JPH02154987A (ja) * 1988-12-06 1990-06-14 Matsushita Refrig Co Ltd フィン付熱交換器
US5467816A (en) * 1993-02-08 1995-11-21 Larinoff; Michael W. Finned tubes for air-cooled steam condensers
EP0769669A1 (fr) * 1995-10-17 1997-04-23 Norsk Hydro Technology B.V. Echangeur de chaleur
DE29808171U1 (de) * 1997-04-28 1998-09-03 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Wärmetauscher

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB359102A (en) * 1930-08-15 1931-10-22 Serck Radiators Ltd Improvements in or relating to cooling and heating radiators
JPH02154987A (ja) * 1988-12-06 1990-06-14 Matsushita Refrig Co Ltd フィン付熱交換器
US5467816A (en) * 1993-02-08 1995-11-21 Larinoff; Michael W. Finned tubes for air-cooled steam condensers
EP0769669A1 (fr) * 1995-10-17 1997-04-23 Norsk Hydro Technology B.V. Echangeur de chaleur
WO1997014927A1 (fr) 1995-10-17 1997-04-24 Norsk Hydro Technology B.V. Echangeur de chaleur
DE29808171U1 (de) * 1997-04-28 1998-09-03 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Wärmetauscher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 404 (M - 1018) 31 August 1990 (1990-08-31) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2375164A (en) * 2001-05-04 2002-11-06 Llanelli Radiators Ltd Heat exchanger system
GB2409511A (en) * 2001-05-04 2005-06-29 Calsonic Kansei Uk Ltd Heat exchanger with spaced tubes and fins
GB2375164B (en) * 2001-05-04 2005-11-30 Llanelli Radiators Ltd Heat exchanger system
GB2409511B (en) * 2001-05-04 2005-11-30 Calsonic Kansei Uk Ltd Heat exchanger system
WO2007028462A1 (fr) * 2005-09-02 2007-03-15 Behr Gmbh & Co. Kg Echangeur de chaleur assemble mecaniquement
FR3053108A1 (fr) * 2016-06-27 2017-12-29 Valeo Systemes Thermiques Echangeur de chaleur ameliore evitant les defauts de contact entre tubes et ailettes

Also Published As

Publication number Publication date
AU1028699A (en) 2000-04-17

Similar Documents

Publication Publication Date Title
US6032728A (en) Variable pitch heat exchanger
US4778004A (en) Heat exchanger assembly with integral fin unit
US5207738A (en) Heat exchanger manifold assembly
US5501270A (en) Plate fin heat exchanger
US5482115A (en) Heat exchanger and plate fin therefor
US5052480A (en) Pipe for coolant condenser
EP1231448A3 (fr) Echangeur de chaleur
US5094293A (en) Heat exchanger
JPH01193596A (ja) 熱交換器用プレートフィン
US20090065184A1 (en) Heat exchanger
US2734259A (en) Method of making heat exchanger
JP3329893B2 (ja) 熱交換器のヘッダタンク
US6594897B2 (en) Method for manufacturing coolant tube of heat exchanger
US6364006B1 (en) Beaded plate for a heat exchanger and method of making same
US4881311A (en) Heat exchanger assembly with integral fin unit
EP0631100A2 (fr) Echangeur de chaleur à courants parallèles
JP3049386B2 (ja) 複合熱交換器
EP3657117A1 (fr) Procédé de fabrication d'échangeur de chaleur, procédé de superposition d'échangeur de chaleur, échangeur de chaleur et échangeur de chaleur à rangées multiples
WO2000019162A1 (fr) Ailette d'echangeur de chaleur
US5634519A (en) Heat exchanger, especially for cooling a high temperature air stream
US3106958A (en) Heat exchanger
CN217464958U (zh) 微通道换热器组及具有其的空调***
EP1065464A1 (fr) Echangeur de chaleur avec joue latérale à compression variable
JP2000055583A (ja) 熱交換器
WO1997014927A1 (fr) Echangeur de chaleur

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

122 Ep: pct application non-entry in european phase