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
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/04—Arrangements for sealing elements into header boxes or end plates
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
  • F28F9/0224—Header boxes formed by sealing end plates into covers
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/0243—Header boxes having a circular 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
  • F28F2225/00—Reinforcing means
  • F28F2225/08—Reinforcing means for header boxes
• • 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
• • 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
  • F28F2275/04—Fastening; Joining by brazing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts

Definitions

• the invention relates to a manifold for a heat exchanger, in particular for a motor vehicle.
• the invention also relates to a corresponding heat exchanger.
• a heat exchanger is for example used in a motor vehicle, especially as a cooling system radiator, or in high pressure applications for example as a condenser of an air conditioning system.
• such a heat exchanger comprises a bundle of tubes and at least one manifold.
• This manifold is configured to receive the ends of the tubes of the heat exchanger.
• the header generally comprises a manifold for example in the form of a header plate.
• the manifold usually also has a lid which is fixed to the header plate to close the manifold.
• the collector plate makes it possible to distribute the fluid towards the heat exchange tubes or to collect the fluid coming from these heat exchange tubes.
• the collector plate is generally made of aluminum and can be made for example by stamping.
• the collector plate has a generally flat bottom.
• the collector has a bottom at least partially rounded to hold the pressure.
• the flat-bottomed or round-bottomed collector plate is usually provided with flanges surrounding openings through which the ends of the tubes of the heat exchanger bundle pass.
• the openings such as slots are made in the header plate to introduce the tubes, for example with a removal of material or on the contrary without removal of material. In the latter case, the material is pushed by the tool towards the inside of the volume defined by the manifold, thus creating a collar around the opening for the introduction of the tube.
• the collars make it possible to have a good contact between the tube and the opening in the collector plate and to obtain a good brazing quality in the case of brazed exchangers, for example all aluminum.
• the tubes are generally inserted into the opening in the same direction as the tooling to make the collars around the openings.
• the inserted tubes generally extend partially inside the manifold to ensure proper brazing and a tight, tight assembly. According to some solutions, the tubes exceed in the fluid reservoir volume by nearly half the volume of the header.
• a flat-bottom header can have so-called inverted collars, that is to say formed in the opposite direction to the insertion direction of a heat exchange tube.
• the collars then have a flared shape facing away from the volume defined by the manifold.
• inverted collars have a small flare, ie known inverted collars define a low input cone for insertion of the heat exchange tubes.
• the inlet cone may therefore not be sufficient to allow simple insertion of the heat exchange tubes, and the known solutions of the prior art may have difficulties in insertion of heat exchange tubes in the collector.
• the object of the invention is to propose a collecting box making it possible to solve these problems of the prior art.
• the subject of the invention is a collecting box for exchanger thermal device comprising a collector having an at least partially rounded shape and comprising a plurality of openings for the passage of a plurality of heat exchange tubes of the heat exchanger, and a plurality of collars surrounding the openings,
• the collector further comprises a plurality of corrugations, and in that the collars are formed at the corrugations of the collector and respectively have a substantially flared shape directed to the opposite side to the volume defined by the manifold.
• the collars are formed at vertices of the corrugations facing away from the volume defined by the manifold.
• Such an at least partially rounded box is adapted to hold the pressure in high pressure applications, and the collector with such reversed collars, that is to say whose direction is opposite to the usual direction of insertion. tubes, allows to receive the ends of the tubes that previously protruded inside the volume defined by the manifold.
• the inverted flanges of the invention define an inlet opening for the insertion of the heat exchange tubes, substantially tulip-shaped, which is sufficiently large thanks to this contribution of material.
• Said manifold may further comprise one or more of the following features, taken separately or in combination:
• the collector has at least one wall of substantially convex shape towards the outside of the volume defined by the collecting box,
• the corrugations are formed on the wall, the corrugations have respectively a height greater than 30% of the pitch of the tube, this height is sufficient to form a collar,
• the collars respectively have a substantially conical shape
• a cone formed by a collar has an angle of the order of 30 °, facilitating the introduction at the same time of the plurality of heat exchange tubes into the openings of the collector surrounded by the collars,
• the collars have respectively a first width and a second width greater than the first width, for example of the order of twice the first width, thus providing an opening wide enough to facilitate the introduction of all heat exchange tubes in the openings of the collector,
• the first width is substantially equal to the width of a tube intended to be inserted into the opening
• the collars respectively have two substantially convex flared edges, the convexity of which is oriented towards the outside of the volume defined by the manifold, the collars have a height of the order of half the height of a corrugation,
• the flanges are thinned with respect to the corrugations on the collector, so that the corrugations present respectively a first thickness and the collars respectively have a second thickness less than the first thickness of the corrugation,
• the thinning of the material at the level of a collar is at least greater than 30% of the initial thickness of the material, or even locally greater than 50% of the initial thickness of the material.
• the invention also relates to a heat exchanger, in particular for motor vehicles, comprising a bundle of heat exchange tubes whose ends are fixed to at least one header, as defined above.
• It can be a brazed heat exchanger.
• it may be a heat exchanger whose elements forming the slip box are mechanically assembled to each other.
• the heat exchange tubes have a height of between 0.8 mm and 2.5 mm, preferably between 1.2 mm and 1.8 mm.
• the pitch of the heat exchange tubes is for example between 5mm and 10mm, preferably between 6 mm and 8mm.
• FIG. 1 is a perspective view of a header box according to the invention for a heat exchanger
• FIG. 2 is a partial sectional view of the manifold of FIG. 1, receiving an end of a tube partially represented by a bundle of tubes of the heat exchanger,
• FIG. 3 is a side sectional view of the manifold of FIG. 1,
• FIG. 4a is a first perspective view of a collector of the collector box of FIGS. 1 to 3,
• FIG. 4b is a second perspective view of the collector of the collector box of FIGS. 1 to 3,
• FIG. 5 is a cross-sectional view of the collector of FIGS. 4a and 4b.
• FIG. 6 is an enlarged view of the collector of FIG. 5 receiving ends of tubes of the heat exchanger.
• FIG. 1 shows schematically and simplified a fluid manifold 1 for a heat exchanger (not shown), particularly in the automotive field.
• the heat exchanger can be used in particular as a radiator or condenser for a motor vehicle.
• the invention can be applied for a brazed heat exchanger.
• the heat exchanger comprises a bundle of tubes 3. Only one end of a tube 3 is visible in Figure 2.
• the tubes 3 are for example made of aluminum or aluminum alloy. This is, for example, tubes 3 substantially flattened.
• the manifold 1 is configured to receive at least one end of a tube 3 of the heat exchanger, more specifically to receive the ends of a plurality of tubes 3, the heat exchanger (not shown). Only one end of a tube 3 is visible in FIG.
• the manifold 1 comprises a manifold 5.
• the manifold 1 further comprises a lid 6 fixed to the manifold 5, so as to close the manifold 1.
• the collector 5 is for example made of aluminum or aluminum alloy.
• the cover 6 can be made of aluminum alloy aluminum, or alternatively plastic.
• the lid 6 can be attached to the manifold 5 for example by clipping, soldering or crimping.
• the collector 5 comprises a plurality of openings 7 for the passage of the ends of the tubes 3.
• the openings 7 have for example a substantially elongated shape, such as slots.
• the ends of the tubes 3 received in the openings 7 can then be brazed, for example to the collector 5.
• the heat exchange tubes 3 have a height of between 0.8 mm and 2.5 mm, preferably between 1.2 mm and 1.8 mm.
• the pitch of the heat exchange tubes 3, that is to say the spacing between two heat exchange tubes 3, is for example between 5mm and 10mm, preferably between 6 mm and 8mm.
• the collector 5 has a wall 8 forming a box bottom.
• the manifold 1 further comprises side walls 8 'connected to this box bottom 8.
• the wall 8 forming a bottom box also called bottom wall 8
• the bottom wall 8 of the collector 5 has a shape substantially concave with respect to the internal volume defined by the manifold 1, and substantially convex relative to the tube bundle 3 of the heat exchanger whose convexity is oriented outwardly of the volume defined by the manifold 1.
• the manifold 1 further comprises a predefined number of collars 9 formed on the collector 5 at the openings 7 to receive the ends of the tubes 3. More precisely, each opening 7 is surrounded by a collar 9.
• the collars 9 are here made without removal of material.
• the collector 5 further comprises a plurality of deformations 11. These deformations 11 are formed at the substantially convex bottom wall 8 of the collector 5. The deformations 11 are for example made to form a regular pattern.
• it is waves or waves 11.
• the corrugations 11 may be made symmetrically with respect to the longitudinal axis of the bottom wall 8 of the collector 5.
• the corrugations 11 thus have vertices extending alternately on either side of the longitudinal axis of the 5.
• the corrugations 11 have for example a plurality of vertices directed inwardly of the volume defined by the manifold 1 and a plurality of opposing vertices directed towards the opposite of the volume defined by the collecting box, and therefore outwardly of the manifold 1 and to the tube bundle 3 of the heat exchanger.
• the collars 9, better visible in Figures 4a, 4b, are formed at the corrugations 11, more precisely to the vertices of the corrugations 11 directed towards the opposite of the volume defined by the manifold.
• the openings 7 are formed by piercing or perforating the collector 5 at the apices of the corrugations 11 directed towards the opposite of the volume defined by the collecting box, and the collars 9 are made by the material around these openings 7.
• the corrugations 11 are produced with a sufficient height h (see FIG. 5), for example with a height h greater than 30% of the pitch. of tube.
• the collars 9 thus formed are directed towards the opposite of the volume defined by the manifold 1, namely towards the bundle of tubes 3 of the heat exchanger. We are talking about 9 inverted collars.
• the collars 9 have a height h 'sufficient to allow insertion of the ends of the tubes 3, for example of the order of half the height h of a corrugation 11.
• the collars 9 have a generally flared shape, such as a tulip shape.
• the collars 9 respectively have a shape substantially conical, for example of angle ⁇ of the order of 30 ° (see Figure 5).
• a collar 9 thus has two flared edges 9a, 9b, corresponding to the two large edges, connected to each other by two small edges 9c, 9d.
• This flared or substantially conical shape facilitates the introduction of the ends of the tubes 3 into the manifold 5, from the outside of the volume defined by the manifold 1 towards the inside of the volume defined by the manifold 1.
• the two flared edges 9a, 9b have, for example, a substantially convex shape whose convexity is oriented towards the outside of the volume defined by the manifold 1.
• the tulip-shaped collars 9 have respectively:
• the first width h is substantially equal to or slightly greater than the width of a tube 3 intended to be inserted into the opening 7.
• the largest width i 2 defines the opening 7 surrounded by the collar 9 for the insertion of the end of a tube 3.
• the second width i 2 is provided wide enough to allow simple insertion, and in particular at the same time the ends of the set of tubes 3 of the heat exchanger (not shown) in the openings 7.
• the second width i 2 is for example of the order of twice the first width i of the collar 9.
• the collars 9 can be thinned relative to the corrugations 11 on the collector 5. Indeed, with reference to Figure 6, a corrugation 11 has for example a first thickness e 1; and the collar 9 has a second thickness e 2 smaller than the first thickness i i of the corrugation 11.
• the collar 9 can be thinned both at the large flared edges 9a, 9b and small connecting edges 9c and 9d.
• the material is thinned at the collar 9 which can go beyond 30%, or even locally beyond 50% of the initial thickness of the material.
• this collar 9 can be lengthened.
• a collector 5 comprising such inverted collars 9 facilitates the introduction of the ends of the multiplicity of heat exchange tubes 3 of the heat exchanger at the same time and in a simple manner without the need for specific tools in particular to guide each tube 3 in the associated opening 7.
• flared and inverted collars 9 provide a sufficient opening for introduction from outside the manifold 1 to the interior of the volume defined by the manifold 1.
• these inverted collars 9 allow insertion of the ends of the tubes 3 without these ends opening into the volume defined by the manifold 1 thus promoting the flow of fluid inside the manifold 1.

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• 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)
• Details Of Heat-Exchange And Heat-Transfer (AREA)
• Air-Conditioning For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

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Family Cites Families (15)

• 2013
  • 2013-12-13 FR FR1362571A patent/FR3015016B1/fr not_active Expired - Fee Related
• 2014
  • 2014-10-14 US US15/104,035 patent/US20160377357A1/en not_active Abandoned
  • 2014-10-14 CN CN201480075251.4A patent/CN106461353B/zh active Active
  • 2014-10-14 WO PCT/EP2014/071941 patent/WO2015086195A1/fr not_active Ceased
  • 2014-10-14 KR KR1020167018906A patent/KR20160098413A/ko not_active Ceased
  • 2014-10-14 JP JP2016538586A patent/JP2017500528A/ja active Pending
  • 2014-10-14 EP EP14783865.0A patent/EP3080542B1/de active Active
• 2018
  • 2018-07-20 JP JP2018136979A patent/JP2018189363A/ja active Pending
• 2020
  • 2020-05-11 JP JP2020083313A patent/JP2020128865A/ja active Pending
• 2021
  • 2021-12-27 JP JP2021213497A patent/JP7383687B2/ja active Active

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