EP3411650A1 - Échangeur de chaleur a tubes améliorés - Google Patents
Échangeur de chaleur a tubes améliorésInfo
- Publication number
- EP3411650A1 EP3411650A1 EP17706551.3A EP17706551A EP3411650A1 EP 3411650 A1 EP3411650 A1 EP 3411650A1 EP 17706551 A EP17706551 A EP 17706551A EP 3411650 A1 EP3411650 A1 EP 3411650A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- heat exchanger
- walls
- wall
- 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.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 2
- 239000013529 heat transfer fluid Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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
- F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in 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
- F28F1/006—Tubular elements; Assemblies of tubular elements 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
- F28F1/02—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
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
- F28F1/424—Means comprising outside portions integral with inside portions
- F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
-
- 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
- F28F2001/027—Tubular elements of cross-section which is non-circular with dimples
Definitions
- the present invention relates to a heat exchanger, and more particularly to a tube for brazed type heat exchanger.
- a heat exchanger generally comprises tubes, in which a heat transfer fluid is intended to circulate, and heat exchange elements connected to these tubes.
- Brazed and mechanical type heat exchangers are usually distinguished by their manufacturing process.
- the fluid circulation tubes are generally delimited each by first and second opposed planar walls.
- the fins are interposed between the tubes to which they are connected by brazing.
- the ends of the tubes are connected to fluid collectors.
- This type of tube however, has the disadvantage of being expensive to manufacture, because it is usually made by extrusion in corrosion-sensitive materials. In addition, it is difficult to make a tube whose walls have a small thickness while maintaining channels of large width.
- the object of the invention is to propose a heat exchanger whose tubes make it possible to increase heat exchange with limited pressure losses and whose production cost is reduced.
- the subject of the invention is a heat exchanger comprising at least one flat fluid circulation tube defined by first and second opposed flat walls,
- each wall comprises elongated depressions substantially parallel to each other and to a direction of flow of the fluid intended to flow in the tube, the depressions of the first wall being shifted transversely relative to those of the second wall, so that to that Depression of the first wall extends between two depressions of the second wall.
- the depressions are elongated, there are no discontinuities along the walls of the tube, and the pressure losses are limited. Moreover, the cost of manufacturing such a tube is limited because the depressions can be made by shaping the flat walls of the tube, without extrusion.
- the depressions of the first wall being shifted transversely relative to those of the second wall, so that a depression of the first wall extends between two depressions of the second wall, the channel effect is accentuated. flat with rounded contours, this being conducive to heat exchange without significant pressure losses.
- two successive recesses of the same plane wall are separated by a flat portion of the same wall.
- each wall comprises a central portion extending in the longitudinal direction of the tube in which the depressions extend and longitudinal end portions without depressions extending in the longitudinal direction of the tube.
- the distance between the inner faces of the planar walls in the central portion having depressions is less than the distance between the inner faces of the planar walls in the longitudinal end portions.
- the distance between the outer faces of the walls in the longitudinal end portions is between 0.8 mm and 2 mm, preferably between 1 mm and 1 .4 mm.
- the length of the longitudinal end portions is between 20 mm and 40 mm.
- the section of the tube being of generally oblong shape, the width of the central part comprising depressions is equal to at least 70% of the width of the tube, preferably at least 80% of the width of the tube. , the width of the tube being defined as the major axis of the section of the tube.
- each wall includes lateral end portions extending in the lateral direction of the tube without depressions.
- the distance between the inner faces of the planar walls in the central portion having depressions is less than the distance between the inner faces of the planar walls in the lateral end portions.
- the distance between the outer faces of the walls in the lateral end portions is between 0.8 mm and 2 mm, preferably between 1 mm and 1.4 mm.
- the maximum distance between the inner faces of the walls in the central part having recesses is between 0.3 mm and 0.8 mm, preferably between 0.5 mm and 0.6 mm. In a particular embodiment, the thickness of the walls is between 0.2 mm and 0.4 mm.
- the exchanger comprising at least two consecutive fluid circulation flat tubes each delimited by first and second opposed flat walls, the section of each tube being of generally oblong shape, the distance between the median longitudinal planes of two consecutive tubes is between 5 mm and 10 mm, preferably between 5 mm and 8 mm.
- the invention also relates to a motor vehicle comprising a heat exchanger according to the invention.
- FIG. 1 is a cross-sectional view of a heat exchanger according to a particular embodiment of the invention.
- FIG. 2 is a perspective view of a portion of a tube of a heat exchanger according to a particular embodiment of the invention
- FIG. 3 is a cross-sectional view along the plane III-III of Figure 2;
- FIG. 4 is a detailed view of the circled portion IV of FIG. 3.
- FIG. 1 shows a portion of a brazed heat exchanger 1 according to the invention intended to equip a motor vehicle.
- the heat exchanger 1 comprises 2 flat tubes of fluid circulation connected by soldering to superposed fins 3. For the sake of clarity, FIG. 1 only shows one of these fins 3.
- Each tube 2 has a generally flat tubular elongated shape of substantially oblong cross-section, and is delimited by first and second opposed flat walls 2a, 2b.
- the distance, or not, P, between the median longitudinal planes of two consecutive tubes 2 is between 5 mm and 10 mm, preferably between 5 mm and 8 mm.
- the thickness T T (see in particular FIG. 3) of the first wall 2a and the second wall 2b is advantageously between 0.2 mm and 0.4 mm.
- each wall 2a, 2b comprises recesses 4 elongated substantially parallel to one another and to a direction of flow of the fluid intended to flow in the tube 2.
- the recesses 4 extend over respective central portions 6 of the first wall 2a and the second wall 2b, which extend in the longitudinal direction of the tube 2 so as to leave without recesses 4 longitudinal end portions 8 which extend in the longitudinal direction of the tube 2.
- the longitudinal term here must be understood as following the longitudinal direction of the tube, which corresponds to the direction of flow of the fluid intended to flow in the tube 2.
- the length L E of the longitudinal end portions 8 is between 20 mm and 40 mm.
- the central portion 6 comprising the recesses 4 extends in the lateral direction of the tube 2 so as to leave the end portions without recesses.
- Lateral extension of the tube should be understood here as in the lateral direction of the tube, which corresponds to the direction of the width of the tube 2, the width of the tube being defined as the large axis of the oblong section of the tube 2.
- the width W D of the central portion 6 is equal to at least 70% of the width of the tube 2, or 80% of the width of the tube 2.
- the depressions 4 have a semicircular cross section.
- the recesses of the first wall 2a are offset transversely relative to those of the second wall 2b (lower wall), so that a depression 4 of the first wall 2a extends between two recesses 4 of the second wall 2b.
- a depression 4 of the first wall 2a is located opposite a flat portion 12 of the second wall 2b.
- the distance H between the inner faces 14 of the walls p! AR- ⁇ 2a, 2b in the central part 6, where the depressions 4 extend, is less than the distance H E between the inner faces 14 of the walls 2a, 2b planes in the longitudinal end portions 8, as well as in the lateral end portions 1 0.
- the variation between, on the one hand, the maximum distance Hi between the inner faces 14 of the walls 2a, 2b in the central part 6 having depressions 4 and, on the other hand, on the other hand, the minimum distance H 2 between the internal faces 14 of the walls 2a, 2b in the central part 6 is less than 20% between the internal faces 14 of the walls 2a, 2b in the central part 6.
- the maximum distance between the inner faces 14 of the walls 2a, 2b, which corresponds to the distance H in the central portion 6 having the depressions 4, is between 0.3 mm and 0.8 mm, preferably between 0.5 mm and 0.6 mm. .
- the maximum distance between the outer faces 1 6 of the walls 2a, 2b, also called height of the tube H T is between 0.8 mm and 2 mm, preferably between 1 mm and 1 .4 mm.
- the height of the tube H T corresponds in this case to, firstly, the distance between the outer faces 16 of the walls 2a, 2b in the longitudinal end portions 8, and, secondly, to the distance between the outer faces of the walls 2a, 2b in the lateral end portions 1 0.
- the cross section of the depressions may have a general triangular or rectangular shape rather than semi-circular.
- the tube may also be a bent tube with central legs, or an electro-welded tube.
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
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1650927A FR3047554B1 (fr) | 2016-02-05 | 2016-02-05 | Echangeur de chaleur a tubes ameliores |
| PCT/FR2017/050119 WO2017134359A1 (fr) | 2016-02-05 | 2017-01-20 | Échangeur de chaleur a tubes améliorés |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3411650A1 true EP3411650A1 (fr) | 2018-12-12 |
Family
ID=55752529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17706551.3A Withdrawn EP3411650A1 (fr) | 2016-02-05 | 2017-01-20 | Échangeur de chaleur a tubes améliorés |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3411650A1 (fr) |
| CN (1) | CN109073335A (fr) |
| FR (1) | FR3047554B1 (fr) |
| WO (1) | WO2017134359A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184059A (zh) * | 2020-09-15 | 2022-03-15 | 洛阳明远石化技术有限公司 | 换热管及包括其的换热器 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5186250A (en) * | 1990-05-11 | 1993-02-16 | Showa Aluminum Kabushiki Kaisha | Tube for heat exchangers and a method for manufacturing the tube |
| KR100261006B1 (ko) * | 1996-07-03 | 2000-07-01 | 오타 유다카 | 열교환기용 편평튜우브 |
| JPH10137877A (ja) * | 1996-11-05 | 1998-05-26 | Zexel Corp | 熱交換器用チューブの製造方法 |
| US6151949A (en) * | 1999-08-25 | 2000-11-28 | Visteon Global Technologies, Inc. | Method of manufacturing a flat corrugated tube |
| CN202145023U (zh) * | 2011-07-01 | 2012-02-15 | 北京桑普电器有限公司 | 一种菱形通道充油式薄板电暖器 |
| CN204202469U (zh) * | 2014-10-29 | 2015-03-11 | 张博然 | 机翼式换热扁管 |
-
2016
- 2016-02-05 FR FR1650927A patent/FR3047554B1/fr not_active Expired - Fee Related
-
2017
- 2017-01-20 CN CN201780012753.6A patent/CN109073335A/zh active Pending
- 2017-01-20 EP EP17706551.3A patent/EP3411650A1/fr not_active Withdrawn
- 2017-01-20 WO PCT/FR2017/050119 patent/WO2017134359A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3047554B1 (fr) | 2019-05-17 |
| FR3047554A1 (fr) | 2017-08-11 |
| WO2017134359A1 (fr) | 2017-08-10 |
| CN109073335A (zh) | 2018-12-21 |
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