EP3794299A1 - Heat exchanger for a motor vehicle - Google Patents
Heat exchanger for a motor vehicleInfo
- Publication number
- EP3794299A1 EP3794299A1 EP19745678.3A EP19745678A EP3794299A1 EP 3794299 A1 EP3794299 A1 EP 3794299A1 EP 19745678 A EP19745678 A EP 19745678A EP 3794299 A1 EP3794299 A1 EP 3794299A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- louvers
- group
- downstream
- upstream
- tubes
- 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.)
- Pending
Links
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 41
- 239000013529 heat transfer fluid Substances 0.000 claims abstract description 5
- 239000003507 refrigerant Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005096 rolling 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
- F28F1/10—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
- F28F1/126—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 consisting of zig-zag shaped fins
- F28F1/128—Fins with openings, e.g. louvered fins
Definitions
- the invention relates to a heat exchanger of a motor vehicle, in particular a radiator or a condenser.
- patent application DE102009021177 describes a fin comprising a rib plate with several rib flanks extending substantially in a geometric flow direction.
- a rib side has several louvers arranged sequentially in the direction of flow. Multiple through holes are formed with greater height than the sides of the ribs.
- the invention aims to improve this type of fins in heat exchangers.
- the subject of the invention is a motor vehicle heat exchanger, comprising:
- the fin exchanger in which at least one of the fins, in particular most of the fins or all the fins, comprises a group of upstream louvers and a group of downstream louvers, these louvers defining passages for an air flow from the upstream group to the downstream group, and the number of louvers in the upstream louver group is different of, preferably strictly greater than, the number of louvers in the downstream group of louvers.
- the invention is particularly advantageous insofar as the pressure drop is reduced at the level of the downstream group of louvers.
- the pressure drop is reduced at the level of the downstream group of louvers.
- it is notably possible to reduce the external pressure drop by about 10%. This is possible in particular thanks to a smaller number of louvers and therefore leading edges in the downstream group.
- it is possible to evacuate hot air more easily when the air circulating in contact with the tubes heats up, the warmer air being more expanded than the less hot air or the cold air.
- the number of louvers in the upstream louver group is strictly greater than the number of louvers in the downstream louver group with a difference of at least 2 or even 5 louvers.
- the number of leading edges of louvers in the upstream group is higher than the number of leading edges of louvers in the downstream group.
- the space between two neighboring shutters in the upstream group is smaller than the space between two neighboring shutters in the downstream group.
- the length projected on the axis of one of the louvers in the upstream group and that of one of the louvers in the downstream group are different.
- each fin comprises several flat parts having the shape of a flat plate, and multiple curved junction parts connecting two of the flat parts.
- each fin comprises several louvers formed on the flat part.
- each planar part has a central central region which is a part in which a direction of flow of the air flowing in the vicinity of the planar part is changed.
- the direction of inclination of the shutters is different between an upstream side of the region and a downstream side of the region.
- the subject of the invention is also a fin comprising a group of upstream louvers and a group of downstream louvers, these louvers defining passages for an air flow from the upstream group to the downstream group, and the number of louvers in the group of upstream louvers is different from, preferably strictly greater than, the number of louvers in the downstream group of louvers.
- FIG. 1 illustrates, diagrammatically and partially, a heat exchanger according to an exemplary embodiment of the invention
- - Figure 2 to 4 illustrate, schematically and partially, different views of a fin of the exchanger of Figure 1.
- a heat exchanger 100 which can be a condenser or a motor vehicle radiator, which comprises tubes 1 through which circulates a heat transfer fluid, for example a refrigerant.
- a heat transfer fluid for example a refrigerant.
- Each tube 1 has, in cross section, a substantially oval outer shape.
- the tubes 1 are arranged parallel to each other in a direction X1.
- the direction X1 is perpendicular to the direction of air flow FX which passes through the exchanger 100.
- the tubes 1 are spaced along a direction X2.
- Each of the tubes 1 has a pair of flat outer walls 2 and 3 exposed to an air passage.
- the flat walls 2 and 3 are opposite one another in the stacking direction X2 of the tubes 1.
- the flat walls 2 and 3 can be arranged to be parallel to each other.
- the exchanger 100 further comprises fins 20, each of which has a corrugated shape and which is provided in an air passage between two neighboring tubes 1.
- Each fin 20 comes into contact with the flat wall 2; 3 of a tube 1 on one side of the fin 20, and a flat wall 2; 3 of another tube 1 on the other side of the fin 2.
- the fins 2 are used as heat transfer elements which promote the exchange of heat between the air and the refrigerant by increasing a heat transfer zone between them
- the radiator further comprises a pair of collectors 4 situated at the two ends of the tubes 1 in the longitudinal direction X1 of the tubes 1.
- the collectors 4 extend in the stacking direction X2 and communicate with the tubes 1.
- Each manifold 4 comprises a central plate 5 through which the tubes 1 extend to be fixed to a respective tank 6.
- the central plate 5 is made for example of metal and a wall 7 of the manifold 4 for example of plastic.
- One of the manifolds 4 which distributes the refrigerant to the tubes 1 is called the intake manifold, and the other of the manifolds 4 which collects the refrigerant flowing from the tubes 1 is called the outlet manifold.
- Heat transfer fluid inlets and outlets, not shown, are provided respectively on the collectors 4.
- each fin 20 comprises several flat parts 21 having the shape of a flat plate, and multiple curved junction parts 22 connecting two of the flat parts 21.
- planar portions 21 and the curved joining portions 22 are arranged alternately so as to give the fin 20 an overall wavy shape.
- the curved junction parts 22 are connected to the tubes 1, and each fin 20 is thus connected to two of the neighboring tubes 1 via these junction parts 22.
- the heat is transferable between the tubes 1 and the fins 20.
- the corrugated fin 20 is obtained by rolling a thin metal plate element.
- each fin 20 comprises several louvers formed on the flat part 21.
- the louvers on the flat part 21 are arranged in two groups, namely the louvers 23 and the louvers 25.
- the group 31 of louvers 23 is an upstream group and the group 32 of louvers 25 is a downstream group, when we take takes into account the direction of flow of air which circulates through the exchanger 100. In other words, the air comes first into contact with the group 31 of louvers then with the group 32 of louvers.
- Louvers 23; 25 are obtained by cutting a part of the planar part 21 and by lifting the cut part of the planar part 21.
- the shutters 23; 25 are inclined from the flat part 21 at a predetermined angle when the shutters 23 are seen in the stacking direction of the tubes X2.
- the angle of inclination of the shutters is A1 for group 31.
- the angle of inclination of the shutters is A2 for group 32.
- the angle A1 is equal to the angle A2.
- An air passage 33 is provided between each two neighboring louvers 23, so that air can flow through the passage 33.
- An upstream end part 40 of the planar part 21 in the air flow direction is a planar part located on an upstream side of the upstream group of louvers 32.
- a downstream end part 41 of the planar part 21 is a downstream planar part 25 where no louver is provided.
- Each flat part 21 has a central central region 44 which is a part in which a direction of flow of the air flowing in the vicinity of the flat part 21 is changed.
- the central region 44 is provided between the groups of upstream louvers 31 and downstream 32.
- the inclination direction of the louvers 23; 25 is different between an upstream side of the region 44 and a downstream side of the region 44. Thus there is a change of direction between the upstream and downstream groups.
- Region 44 has a surface substantially parallel to the direction of air flow FX.
- the number N1 of louvers 23 in the upstream louver group 31 is different from the number N2 of louvers 25 in the downstream louver group 32.
- the number N1 is equal to 13.
- the number N2 is equal to 9.
- the fin is therefore asymmetrical with respect to the central region 44.
- the pitch of the shutters in the first group 31 and the pitch in the second group 32 are different.
- the projected length L1 on the FX axis of one of the louvers in the upstream group 31 and that L2 of one of the louvers in the downstream group 32 are different.
- L2 is larger than L1.
- the space E1 between two neighboring shutters in the upstream group 31 is smaller than the space E2 between two neighboring shutters in the downstream group 32.
- the air passages 33 are more numerous and smaller in the upstream group 31 than in the downstream group 32.
- the shutters are identical and regularly spaced in their respective group.
- the louvers 23 of the upstream group 31 each have a leading edge 51.
- the louvers 25 of the downstream group 32 each have a leading edge 52.
- the number of leading edges 51 is higher than the number of leading edges 52 of the downstream group 32.
- Exchanger 100 can be a multi-pass exchanger.
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)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1855070A FR3082295B1 (en) | 2018-06-11 | 2018-06-11 | MOTOR VEHICLE HEAT EXCHANGER |
PCT/FR2019/051405 WO2019239054A1 (en) | 2018-06-11 | 2019-06-11 | Heat exchanger for a motor vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3794299A1 true EP3794299A1 (en) | 2021-03-24 |
Family
ID=63834127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19745678.3A Pending EP3794299A1 (en) | 2018-06-11 | 2019-06-11 | Heat exchanger for a motor vehicle |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3794299A1 (en) |
FR (1) | FR3082295B1 (en) |
WO (1) | WO2019239054A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4023993A1 (en) * | 2020-12-29 | 2022-07-06 | Valeo Autosystemy SP. Z.O.O. | A heat exchanger |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06147785A (en) * | 1992-11-04 | 1994-05-27 | Hitachi Ltd | Outdoor heat exchanger for heat pump |
US6401809B1 (en) * | 1999-12-10 | 2002-06-11 | Visteon Global Technologies, Inc. | Continuous combination fin for a heat exchanger |
US20090173478A1 (en) * | 2008-01-09 | 2009-07-09 | Delphi Technologies, Inc. | Frost tolerant fins |
CN101846479B (en) * | 2009-03-25 | 2012-02-22 | 三花丹佛斯(杭州)微通道换热器有限公司 | Fins for heat exchanger and heat exchanger using same |
DE102009021177A1 (en) | 2009-05-13 | 2010-11-18 | Behr Gmbh & Co. Kg | Fin for heat exchanger, has rib plate with multiple rib flanks extending substantially in geometric flow direction, where multiple through holes are formed with greater height than rib flanks |
EP2667134A4 (en) * | 2011-01-21 | 2014-07-09 | Daikin Ind Ltd | Heat exchanger and air conditioner |
KR101453708B1 (en) * | 2011-01-21 | 2014-10-22 | 다이킨 고교 가부시키가이샤 | Heat exchanger and air conditioner |
-
2018
- 2018-06-11 FR FR1855070A patent/FR3082295B1/en active Active
-
2019
- 2019-06-11 EP EP19745678.3A patent/EP3794299A1/en active Pending
- 2019-06-11 WO PCT/FR2019/051405 patent/WO2019239054A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2019239054A1 (en) | 2019-12-19 |
FR3082295A1 (en) | 2019-12-13 |
FR3082295B1 (en) | 2020-07-03 |
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