EP3690372A1 - Wärmetauscher für ein kraftfahrzeug - Google Patents
Wärmetauscher für ein kraftfahrzeug Download PDFInfo
- Publication number
- EP3690372A1 EP3690372A1 EP19461509.2A EP19461509A EP3690372A1 EP 3690372 A1 EP3690372 A1 EP 3690372A1 EP 19461509 A EP19461509 A EP 19461509A EP 3690372 A1 EP3690372 A1 EP 3690372A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- deflector
- longitudinal direction
- forming portion
- width
- 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- Withdrawn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
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Classifications
-
- 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
- F28D1/03—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 plate-like or laminated conduits
- F28D1/0391—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 plate-like or laminated conduits a single plate being bent to form one or more conduits
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- 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
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular 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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0082—Charged air coolers
Definitions
- the invention relates to a heat exchanger for motor vehicle, in particular for a charge air cooler.
- CAC Charge Air Cooler
- the tubes of a Charge Air Cooler have a rectangular cross section.
- the turbulator fin has dimensions that fill the inside of the tube as much as possible.
- Tubes for Charge Air Coolers are produced by means of electric welding or folding. The result of such production processes is that the resulting tube height in the corners of the tube is reduced when compared to the remaining part of the tubes.
- the object of the invention is, among others, a tube for a heat exchanger, in particular for a charge air cooler installed in a motor vehicle, the tube being formed by a folded sheet and the folded sheet comprising:
- the object of the invention provides an effective solution for reducing the free space on the tube ends that are not filled by the air turbulator fins which causes bypass for air flow.
- the invention is performed using existing material, so assembling new elements is not necessary.
- the deflector portion forms an additional air channel that improves heat transfer between media. Thanks to the deflector portion the overall thermal performance of the heat exchanger increases.
- the deflector forming portion is essentially U-shaped in a cross-section perpendicular to the longitudinal direction of the tube.
- the deflector forming portion is essentially V-shaped in a cross-section perpendicular to the longitudinal direction of the tube.
- the deflector forming portion is rounded in a cross-section perpendicular to the longitudinal direction of the tube.
- the tube comprises only one deflector forming portion.
- the tube comprises deflector forming portions on the both sides of the tube.
- a lock curb is protruding from the assembling portion.
- the tube has a width (W) and a thickness (T), measured in two perpendicular directions, both perpendicular to the longitudinal axis of the tube, wherein the width is greater than the thickness.
- width of a folded portion is smaller than 50%, in particular smaller than 25%, in particular smaller than 15%, of the width of the tube.
- the deflector forming portion forms an perpendicular angle with the wall that defines the width of the tube.
- the deflector forming portion is slanted towards the closest wall that defines the thickness of the tube.
- the sealing region is fixed (e.g. brazed) to a wall of the tube, along the longitudinal direction of the tube.
- At least one deflector forming portion has an end at a distance from the inner side of the tube.
- a turbulator fin is leaning against the deflector forming portion.
- the turbulator fin is introduced into the inner vicinity of the essentially U-shaped deflector forming portion.
- the turbulator fin is introduced into the inner vicinity of the essentially V-shaped deflector forming portion.
- the turbulator fin is introduced into the inner vicinity of the rounded deflector forming portion.
- the turbulator fin comprises a corrugated sheet with a plurality of adjacent folds between a first transverse side of the sheet and a second transverse side of the sheet
- the end fold forming the edge of the sheet of at least one transverse side of the sheet has a reduced fold height compared to the fixed fold height.
- the turbulator fin is made out of the lightweight metal alloy.
- the deflector forming portion is forming an additional air channel along the longitudinal direction of the tube.
- the deflector forming portion forms an additional air channel which is of the same surface area in reference to a cross-section perpendicular to the longitudinal direction of the tube.
- the outer periphery is limited by two parallel, rectilinear sides.
- the outer periphery is substantially rectangular in reference to the cross-section perpendicular to the longitudinal direction of the tube.
- the edges of rectangle are of the folded lightweight metal, in particular an aluminum.
- a heat exchanger comprises a plurality of tubes.
- the heat exchanger is configured as a charge air cooler.
- the subject of an invention is a tube 10 which is designed for a heat exchanger 1 in particular for a charge air cooler.
- the heat exchanger 1 can be installed in a motor vehicle.
- the heat exchanger 1 comprises a plurality of tubes 10, a housing 2 and at least one inlet 3 and outlet 4.
- the state of the art is presented in the Fig. 1 , wherein the heat exchanger 1 is configured as a charge air cooler and there is a significant free space between the fin 21 and the wall of the tube 11.
- the tube 10 is formed by a folded sheet.
- the sheet is made of a lightweight metal alloy, for example an aluminum.
- the folded sheet comprises a longitudinal direction i.e. its length is determined by the central axis of created air channel.
- the tube 10 is sealed by a sealing region 14 extending along the longitudinal direction of the tube 10, so that the inner space of the tube is air-tight. Sealing is performed for example by the means of brazing the material in the brazing furnace.
- a folded portion extends from an assembling portion 29. The folded portion is forming, among others, the inner space of the tube 10 and comprises a deflector portion 13 for air flowing in the inner space of the tube 10.
- the outer periphery of the tube 10 is substantially rectangular in reference to the cross-section perpendicular to the longitudinal direction of the tube 10.
- the outer periphery is limited by two parallel rectilinear sides, so that the outer periphery is substantially rectangular in reference to a cross-section perpendicular to the longitudinal direction of the tube 10.
- the deflector portion 13 is rounded on the side of the assembling portion 29.
- the deflector portion 13 and the assembling portion 29 form essentially U-shaped composition in the cross-section perpendicularto the longitudinal direction of the tube 10.
- U-shape form can be defined as an object having a cross section in the form of letter U.
- the deflector portion 13 and the assembling portion 29 form essentially V-shaped composition in the cross-section perpendicular to the longitudinal direction of the tube 10.
- V-shape form can be defined as an object having a cross section in the form of letter V.
- Fig. 2 presents a perspective view of the tube 10.
- the tube 10 has a width (W).
- width (W) can be defined as the horizontal measurement taken at right angle to the length (L).
- the tube 10 has a thickness (T). According to the Fig. 2 , thickness (T) can be defined as the smallest of three dimensions of the tube 10.
- the width (W) and the thickness (T) are measured in two perpendicular directions, both perpendicular to the longitudinal axis of the tube.
- the width (W) is greater than the thickness (T).
- the tube 10 comprises only one deflector portion 13.
- the deflector portion 13 is located on one or the other side of the tube 10.
- it is executable to form a second deflector portion 23 out of two different sheets of material forming the tube 10. Consequently, a second sealing region 24 and a second curb 25 are also created.
- the example of this embodiment is presented in the Fig 4 .
- the assembling portion 29 is assembled (e.g. brazed) on the wall 19 in the sealing region 14.
- the tube 10 comprises a curb 15 protruding from the assembling portion 29.
- the curb 15 is carried out of the overlapped material that is bended inwardly along the longitudinal axis during the production process of the tube 10.
- the curb 15 can support a turbulator fin 20.
- the width of the deflector portion 13 should not be greater than 50% of the width (W) of the tube 10. In the other embodiment of an invention, the width of the deflector portion 13 should be smaller than 25% of the width (W) of the tube 10. In the other embodiment of an invention, the width of the deflector portion 13 should be smaller than 15% of the width (W) of the tube 10.
- the deflector portion 13 forms a perpendicular angle with the wall that defines the width of the tube 10. In this embodiment the deflector portion 13 is also parallel to the wall 19 that defines the thickness of the tube 10.
- the deflector portion 13 is slanted towards the closest wall that defines the thickness of the tube i.e. the assembling portion 29. Slanted means that the deflector portion 13 gives an oblique or sloping direction to the wall that defines the width of the tube 10 and to the wall that defines the thickness of the tube 10 i.e. the assembling portion 29.
- the deflector portion 13 is integrally locked along the longitudinal direction of the tube 10.
- the far end of the deflector portion 13 is brazed to the inner side of the tube 10.
- it can be brazed to the wall that defines the width of the tube 10, to the wall that defines the thickness of the tube 10 or to the area connecting these walls.
- At least one deflector portion 13 has an end at a distance from the inner side of the tube 10.
- the end of deflector portion 13 is defined in the cross-section perpendicular to the longitudinal direction of the tube 10 by the margin edge of the folded sheet.
- a turbulator fin 20 is a corrugated sheet made of the lightweight metal alloy comprising a plurality of adjacent folds between a first transverse side of the sheet and a second transverse side of the sheet.
- the turbulator fin 20 has the constant pitch between the adjacent walls and the edges of the folds are of the fixed height.
- the end fold 23 forming the edge of the sheet of at least one transverse side of the sheet has a reduced fold height compared to the fixed fold height. Reducing hold height enables assembling the turbulator fin 20 with the tube 10 comprising a deflector portion 13.
- a turbulator fin 20 is leaning against the deflector portion 13. This type of support ensures the proper fin pitch distribution and it is much more firm than, for example, leaning the turbulator fin 20 against the curb 15.
- the turbulator fin 20 is introduced into the inner vicinity of the deflector portion 13.
- the deflector portion 13 is essentially U-shaped or V-shaped, so entering the turbulator fin 20 into its vicinity is executable in several forms.
- the pitch between adjacent walls of the turbulator fin 20 remains constant and the far end of the turublator fin 20 is leaning against the U-shape of the deflector portion 13 as shown in the Fig. 6 .
- the pitch between adjacent walls of the turbulator fin 20 may be different i.e. the far end portion of the turbulator fin 20 is bent on the pitch or on the wall to enable entering the turbulator fin 20 into the inner vicinity of the deflector portion 13, so that the turbulator fin 20 is leaning against the assembling portion 29.
- the deflector portion 13 is forming an additional air channel along the longitudinal direction of the tube 10.
- the additional air channel is of the same surface area in reference to the cross-section perpendicular to the longitudinal direction of the tube 10.
- the additional air channel is at least partially connected in a fluidical manner with the adjacent channel i.e. the channels located on both sides of the deflector portion 13 are fluidically connected.
- the additional air channel is separated by the deflector portion 13, so that there is no fluidical connection between the channels located on both sides of the deflector portion 13.
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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19461509.2A EP3690372A1 (de) | 2019-02-01 | 2019-02-01 | Wärmetauscher für ein kraftfahrzeug |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19461509.2A EP3690372A1 (de) | 2019-02-01 | 2019-02-01 | Wärmetauscher für ein kraftfahrzeug |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3690372A1 true EP3690372A1 (de) | 2020-08-05 |
Family
ID=65278309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19461509.2A Withdrawn EP3690372A1 (de) | 2019-02-01 | 2019-02-01 | Wärmetauscher für ein kraftfahrzeug |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3690372A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU101492B1 (en) * | 2019-11-25 | 2021-05-26 | Ht Holding Luxembourg S A | Flat heat exchanger tube |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3216140C1 (de) * | 1982-04-30 | 1988-06-16 | Kühlerfabrik Längerer & Reich GmbH & Co KG, 7024 Filderstadt | Wärmeaustauscherrohr |
US20090019694A1 (en) * | 2006-01-19 | 2009-01-22 | Werner Zobel | Flat tube, flat tube heat exchanger, and method of manufacturing same |
EP2639539A1 (de) * | 2010-11-11 | 2013-09-18 | Denso Corporation | Röhre für einen wärmetauscher |
JP2014149137A (ja) * | 2013-02-04 | 2014-08-21 | Keihin Thermal Technology Corp | 扁平状熱交換管およびその製造方法 |
-
2019
- 2019-02-01 EP EP19461509.2A patent/EP3690372A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3216140C1 (de) * | 1982-04-30 | 1988-06-16 | Kühlerfabrik Längerer & Reich GmbH & Co KG, 7024 Filderstadt | Wärmeaustauscherrohr |
US20090019694A1 (en) * | 2006-01-19 | 2009-01-22 | Werner Zobel | Flat tube, flat tube heat exchanger, and method of manufacturing same |
EP2639539A1 (de) * | 2010-11-11 | 2013-09-18 | Denso Corporation | Röhre für einen wärmetauscher |
JP2014149137A (ja) * | 2013-02-04 | 2014-08-21 | Keihin Thermal Technology Corp | 扁平状熱交換管およびその製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU101492B1 (en) * | 2019-11-25 | 2021-05-26 | Ht Holding Luxembourg S A | Flat heat exchanger tube |
WO2021105200A1 (en) * | 2019-11-25 | 2021-06-03 | Ht Holding Luxembourg S.A. | Flat heat exchanger tube |
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