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EP2402700A1 - Wärmetauscher - Google Patents

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Publication number
EP2402700A1
EP2402700A1 EP10168046A EP10168046A EP2402700A1 EP 2402700 A1 EP2402700 A1 EP 2402700A1 EP 10168046 A EP10168046 A EP 10168046A EP 10168046 A EP10168046 A EP 10168046A EP 2402700 A1 EP2402700 A1 EP 2402700A1
Authority
EP
European Patent Office
Prior art keywords
fins
group
hollow tube
tube
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.)
Withdrawn
Application number
EP10168046A
Other languages
English (en)
French (fr)
Inventor
Vincent Colard
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.)
Solaris-PAC
Walonia Space Logistics
Original Assignee
Solaris-PAC
Walonia Space Logistics
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 Solaris-PAC, Walonia Space Logistics filed Critical Solaris-PAC
Priority to EP10168046A priority Critical patent/EP2402700A1/de
Publication of EP2402700A1 publication Critical patent/EP2402700A1/de
Withdrawn legal-status Critical Current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
    • F28F1/10—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
    • F28F1/14—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 longitudinally
    • F28F1/20—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 longitudinally the means being attachable to the element
    • 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
    • F28F1/14—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 longitudinally
    • 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
    • F28F2275/06—Fastening; Joining by welding

Definitions

  • the invention relates to the field of gas / fluid heat exchangers.
  • the invention relates to a gas / fluid heat exchanger comprising a hollow tube capable of containing a fluid and having an outer wall, a first group of at least two fins superimposed and welded together as well as to tube at a first location along the outer wall of the tube, and a second group of at least one fin welded to the tube at a second location along the outer wall of the tube, the first location being different from the second location.
  • the invention also relates to a method of manufacturing such a heat exchanger.
  • JP 11047960 discloses such a heat exchanger.
  • This known heat exchanger comprises a hollow tube having an outer wall of rectangular section and a central channel of circular section. It further comprises a first group of fins stacked on each other and whose slices are placed abutting and are welded by friction against a flat face of the outer wall of the tube.
  • the exchanger comprises also a second group of fins stacked and whose slices are welded by friction against an opposite planar face of the outer wall of the tube.
  • a heat exchange can thus occur with for example air which would be in contact with the fins.
  • An object of the invention is to at least partially solve some problems of known heat exchangers.
  • an object of the invention is to provide a heat exchanger that can be achieved with fewer constraints on the shapes, dimensions and / or choice of materials of its components.
  • the heat exchanger according to the invention is characterized in that the fins of the first group are superimposed radially with respect to the hollow tube at the location of their welding to the hollow tube.
  • the heat exchanger according to the invention is characterized in that the second group comprises at least two fins superimposed and welded together and the hollow tube in the second place and in that the fins of the second group are superimposed radially with respect to the hollow tube at the location of their weld to the hollow tube.
  • Another object of the invention is to provide a heat exchanger that can be made with fewer parts than the known exchangers.
  • the heat exchanger according to the invention is preferably characterized in that at least one of the fins of the first group is welded to the hollow tube in a central part of said fin and in that said fin has wings forming an angle and extending on either side of said central portion.
  • the heat exchanger according to the invention is characterized in that at least one of the fins of the first group is at least partially in contact with the outer wall of the hollow tube outside the first location of its weld tube hollow.
  • the D.1a schematically shows a cross section of an embodiment of a heat exchanger (1) according to the invention.
  • This exchanger comprises a hollow tube (2) which is able to carry a fluid, such as a coolant for example.
  • a fluid such as a coolant for example.
  • the exchanger (1) also comprises a first group of fins (10) formed of a plurality of fins (at least two).
  • the first group of fins (10) comprises three fins superimposed on each other in the direction of their thickness and in a radial direction relative to the tube (2).
  • the proximal portions of the fins of this first group are welded together (solder (4)) through their thickness and to the tube (2) at a first location (4a) on the outer wall (3) of the tube (2). as shown in the figure.
  • the weld (4) therefore extends in depth substantially radially relative to the tube (2). Although not illustrated in this figure, the weld (4) also extends longitudinally with respect to the tube (2), either continuously or discontinuously (spot welding for example).
  • a second group of fins (20) comprising in this example a single fin, is welded to the hollow tube (2) at a second location (4b) on the outer wall (3) of the tube (2), different from the first place (4a).
  • the second place (4b) is opposite to the first place (4a) but this is not essential. It is enough that the first and the second place are different.
  • the distal portions of the fins of the first group (10) are preferably spaced from each other to allow a good flow of gas (often air) between these fins.
  • the fins may for example be thin sheets or plates.
  • a fin may for example have a thickness between 0.1 and 0.8 mm, preferably 0.2 mm.
  • the tube (2) may for example be of circular section and have an outside diameter ranging from 5 mm to 20 mm and a wall thickness ranging from 0.15 mm to 1 mm.
  • the D.1b schematically shows a cross section of an exemplary embodiment of a heat exchanger (1) according to a preferred version of the invention.
  • the second group of fins (20) has three fins superimposed radially and welded to the tube (2) in the same way as the three fins of the first group (10), but in a second location (4b) on the outer wall (3) of the tube (2), different from the first place (4a).
  • the distal portions of the fins of the second group (20) are preferably spaced from each other to allow a good flow of gas (often air) between these fins.
  • the Fig.2 schematically shows a cross section of a heat exchanger (1) according to a more preferred version of the invention.
  • the first group of fins (10) comprises two fins superimposed and radially welded to the tube (2).
  • the outer fin is folded at its central portion (30) and along a longitudinal axis relative to the tube (2), so that it has two wings (13a, 13b) s extending on either side of the central portion (30).
  • This fin is welded to the tube (2) by its central portion (30).
  • its cross section is in the shape of a "V", but a degree of asymmetry could also be suitable.
  • the inner fin is also bent at its central portion and welded to the tube by its central portion (not shown).
  • the second group of fins (20) also has two fins, similar to those of the first group but welded to the tube elsewhere in the tube.
  • the second group may alternatively comprise only one fin as illustrated in FIG. Fig. 1a .
  • Each group of fins may of course have as many fins as necessary, as long as at least one group has at least two fins superimposed radially at its weld tube.
  • Fig.3 schematically shows a cross section of an alternative embodiment of a heat exchanger (1) according to the Fig.2 .
  • the heat exchanger (1) is here provided with four groups of each time two vanes bent in the shape of "V" and welded respectively to four different locations of the outer wall of the tube (2).
  • the fig.4a schematically shows a cross section of a heat exchanger (1) according to an even more preferred version of the invention.
  • the first group of fins (10) has two fins superimposed radially at the location of their weld (4a) to the tube and the inner fin is curved at its proximal portion so that it marries substantially and at least partially the profile (here circular) of the tube outside the place (4a) of its weld to the tube, which improves the heat transfer and thus the efficiency of the exchanger. It is preferably the same for the inner fin of the second group of fins (20).
  • the 4b shows an example in which the fins of each group are all at least partially in contact with each other and / or with the tube outside the place of their soldering to the tube.
  • an inner fin is preferably bent over a larger portion of its surface than an outer fin to obtain a better distribution in the space of the surfaces of said fins, which allows a better flow of gas along the fins.
  • the Fig.5 schematically shows a cross section of an alternative embodiment of a heat exchanger according to the Fig.4 .
  • the exchanger (1) here comprises two groups (10, 20) of two fins each.
  • Each fin has two wings (13a, 13b) extending on either side of a central portion (30) of the fin.
  • each fin is partially curved in its central portion (30) in order to conform substantially and at least partially to the (here circular) profile of the tube (2) outside the location (4a, 4b) of its weld at tube.
  • an inner fin is preferably bent over a larger portion of its surface than an outer fin to obtain a better spatial distribution of the surfaces of said fins.
  • the second group may have only one fin or fins, just as the first group may have more than two fins.
  • the Fig.6 schematically shows a perspective view of the heat exchanger of the Fig. 5 .
  • the oblong shape of the tube (2) and the fins is better seen, as is the longitudinal extent of the welds (4) and the curvature of the fins around the outer wall (3) of the tube.
  • the Fig.7 schematically shows a cross section of a heat exchanger (1) according to an even more preferred version of the invention.
  • the two fins of the first group (10) are welded together as well as to the tube (2) in two distinct places (40a, 40b) along one circumference of the tube (that is, there are two separate points or welds when looking at the exchanger in cross section, as shown in Fig.7 ). This further improves the heat transfer and thus the efficiency of the exchanger.
  • the first group (10) may have more than two distinct welds according to a around the tube. It is preferably the same for the fins of the second group.
  • Fig.8 schematically shows a cross section of an alternative embodiment of a heat exchanger according to the Fig.7 .
  • a first weld (40a) connects the two fins of the first group (10) together with the tube (2), while two other welds (40b, 40c) connect the inner fin of the first group (10) to tube (2) in two other places along a perimeter of the tube. It is preferably the same for the fins of the second group (20).
  • the hollow tube (2) has a circular outer section.
  • the hollow tube (2) also has a circular inner section. This makes it possible to use commercially available tubes.
  • the tube (2) has a polygonal outer section, such as for example a square, a rectangle, a pentagon or a hexagon or any other regular or irregular polygon.
  • the Fig.9 schematically shows a cross section of another alternative embodiment of a heat exchanger according to the Fig.7 .
  • the tube (2) here has a rectangular outer section and the two groups fins (10, 20) are arranged and welded (4a, 4b) radially stacked respectively on the two opposite faces of the tube. It is also possible to have additional groups of fins on the other two faces of the tube or any other combination.
  • the tube (2) is made of a metal of the "soft” or “ductile” type such as, for example, copper, aluminum, brass and bronze.
  • a fin is made of a metal of the "soft” or “ductile” type such as, for example, copper, aluminum, brass and bronze.
  • the tube (2) is copper, and the fins are aluminum or copper.
  • the Fig.10a shows schematically a device comprising a plurality of heat exchangers (1) according to the invention.
  • the tubes (2) of each exchanger (1) are arranged in parallel and are interconnected to form a circuit capable of transporting a fluid.
  • the Fig.10B shows a cross-section according to "CC" of the device of the Fig. 10a .
  • Such a device finds its application, for example, in heat pump systems and can for example fulfill the function of an evaporator.
  • Another example of application is an air conditioning system in which the device will be used as a condenser.
  • the welding of the first group of fins (10) to the tube (2) can be a multiple passes. In this case, we first place the face of a first fin in contact with the tube, then welded this fin to the tube, then a second fin is stacked above the first, then this second fin is welded to the tube, and so on for all the fins of the first group (10).
  • the welding of the first group of fins to the tube can alternatively be a single pass. In this case, we first stack all the fins of the first group, we then put the first group of fins in facial contact with the tube, and then weld this first group to the tube in a single pass (through the different thicknesses fin).
  • the welding of this second group can for example be done by a rotation of the tube (2) relative to a welding head or vice versa.
  • this process is not limited to welding exactly two groups of fins to the tube but that it relates to the welding to the tube of a number of groups of fins greater than or equal to two, each group of fins being welded in a separate location around the perimeter of the tube.
  • At least one of the fins of the first group is welded to the tube by a central portion (30) of said fin.
  • said fin is preferably folded in its central part to form two wings (13a, 13b) extending on either side of said central portion (30), the folding taking place either before or after the welding said fin to the tube (2).
  • the soldering steps are ultrasonic welding steps. It is a welding technique known per se and by which high frequency vibrations are transmitted to the parts to be welded (here the tube and one or more fins of a group) by means of a vibrating tool called "Sonotrode" or welding head.
  • This particular welding technique to manufacture a heat exchanger according to the invention has the advantage that long welding beads can be made at high speed and that the heat releases are very low, which reduces the deformations. fins and carbon residue deposits.
  • a heat exchanger (1) comprising a hollow tube (2) capable of driving a fluid and at least two groups of fins (10, 20).
  • a first group of fins (10) comprises at least two fins welded together as well as to the outer wall (3) of the hollow tube so that they are stacked radially with respect to the hollow tube (2). place (4a) of the weld.
  • a second group of fins (20) has at least one fin welded to the outer wall (3) of the hollow tube at another location (4b) around the hollow tube.
  • the invention also relates to a method of manufacturing such a heat exchanger.

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  • 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)
EP10168046A 2010-07-01 2010-07-01 Wärmetauscher Withdrawn EP2402700A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10168046A EP2402700A1 (de) 2010-07-01 2010-07-01 Wärmetauscher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10168046A EP2402700A1 (de) 2010-07-01 2010-07-01 Wärmetauscher

Publications (1)

Publication Number Publication Date
EP2402700A1 true EP2402700A1 (de) 2012-01-04

Family

ID=43063534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10168046A Withdrawn EP2402700A1 (de) 2010-07-01 2010-07-01 Wärmetauscher

Country Status (1)

Country Link
EP (1) EP2402700A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105318188A (zh) * 2015-07-02 2016-02-10 浙江海洋学院 固接外换热片可拆连接内换热片的液化天然气气化器
EP2993437A1 (de) * 2014-08-19 2016-03-09 PARS Decín spol.s r.o. Wärmeübertragungsrohr

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE866348C (de) * 1950-11-10 1953-02-09 Linde Eismasch Ag Waermeaustauscher mit parallel zur Rohrachse verlaufenden Flossen oder Nadelreihen
US3205563A (en) * 1956-06-21 1965-09-14 Olin Mathieson Finned structure and method of manufacture
JPS5784990A (en) * 1980-11-18 1982-05-27 Furukawa Electric Co Ltd:The Heat pipe type radiator
FR2700839A1 (fr) * 1993-01-26 1994-07-29 R D Ste Civile Echangeur thermique et dispositif de refroidissement comportant un tel échangeur.
JPH1147960A (ja) 1997-08-04 1999-02-23 Showa Alum Corp 熱交換器
WO2008051066A1 (es) * 2006-10-23 2008-05-02 Gandara Granger Roman Condensador mejorado, para sistema de refrigeración

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE866348C (de) * 1950-11-10 1953-02-09 Linde Eismasch Ag Waermeaustauscher mit parallel zur Rohrachse verlaufenden Flossen oder Nadelreihen
US3205563A (en) * 1956-06-21 1965-09-14 Olin Mathieson Finned structure and method of manufacture
JPS5784990A (en) * 1980-11-18 1982-05-27 Furukawa Electric Co Ltd:The Heat pipe type radiator
FR2700839A1 (fr) * 1993-01-26 1994-07-29 R D Ste Civile Echangeur thermique et dispositif de refroidissement comportant un tel échangeur.
JPH1147960A (ja) 1997-08-04 1999-02-23 Showa Alum Corp 熱交換器
WO2008051066A1 (es) * 2006-10-23 2008-05-02 Gandara Granger Roman Condensador mejorado, para sistema de refrigeración

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2993437A1 (de) * 2014-08-19 2016-03-09 PARS Decín spol.s r.o. Wärmeübertragungsrohr
CN105318188A (zh) * 2015-07-02 2016-02-10 浙江海洋学院 固接外换热片可拆连接内换热片的液化天然气气化器

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