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
  • F28F9/0219—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
  • 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
  • F28D1/04—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 tubular conduits
  • F28D1/053—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 tubular conduits the conduits being straight
  • F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
  • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
• • 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

Definitions

• the invention relates to the field of heat exchangers and more particularly relates to a header manifold, of the type comprising a substantially flat plate with openings for receiving tubes of a heat exchanger, and side edges raised s extending at an angle of said plate and connected thereto by at least one curved portion in which ribs are formed, each having a convexity extending substantially in the direction of extension of the lateral edges.
• collectors are used in particular in collector boxes obtained by assembling two collector pieces, namely a collector and a cover, the collector being most often made of aluminum or aluminum-based alloy.
• Such manifolds are used in heat exchangers and in particular in radiators for cooling the motor or the charge air of motor vehicles.
• the coolant or the charge air which circulates in the header and in the tubes, is at a high pressure and at a temperature that may exceed 100 ° C.
• One of the main difficulties in the design of such manifolds is to obtain a good pressure resistance for the manifold, without using too large a width of material to achieve it.
• Some collector boxes are already known whose design aims to solve this problem, such as that presented in US 2003 217838.
• the collector has a substantially U-shaped section, and its thickness is doubled by a fold of material at the the connection between the branches of the U and the bottom of it. This type of design increases the use of raw material, occupies a lot of space, and the need to braze the collector on itself at the level of the folds prevents inter alia the use of an anticorrosive coating inside that -this.
• FR 2,720,490 discloses a header plate having openings in a substantially planar region which is connected to at least one generally cylindrical curved region away from the plane of the planar region, in which the cylindrical shape is interrupted by a multiplicity of recessed areas. Although it offers good resistance to fracture, this type of collector plate is nevertheless particularly poorly adapted to the insertion of the tubes.
• the invention aims to improve the situation.
• the invention proposes for this purpose a collector, of the type comprising a substantially flat plate with holes for receiving tubes of a heat exchanger, as well as raised lateral edges extending at an angle of said plate and connected to that by at least one curved portion in which are formed ribs each having a convexity extending substantially in the direction of extension of the lateral edges, the plate further comprising additional ribs between at least said holes.
• the ribs of the plate each have a convexity extending substantially in the direction opposite to the direction of extension of the lateral edges.
• the ribs of the plate are disposed between each of the holes, and each hole is thus surrounded by two ribs whose convexities form a tube insertion guide.
• Such a collector is particularly interesting in that it offers a high resistance to the pressure at break thanks to the ribs made, while offering the possibility of guiding the tubes for their insertion.
• the lateral edges also have ribs, the ribs of each lateral edge being each able to have a convexity extending in the directions of the opposite lateral edge. At least some of the ribs of the lateral edges may be arranged in continuity with the ribs of the curved portion, or on the contrary be arranged on the manifold alternately with the ribs of the curved portion.
• the ribs of the lateral edges extend over a portion of the lateral edges not including the end thereof.
• Such a collector is further reinforced by the presence of the ribs on the lateral edges.
• the positioning of the ribs of the lateral edges in the continuity or on the contrary alternating with the ribs of the curved portion makes it possible to better control the characteristics of the deformation of the collector.
• positioning the convexity of the ribs to the opposite side edge, that is to say towards the inside of the manifold when it mounted saves space.
• the limited extent of the ribs of the lateral edges makes it possible to position a cover inside the edges of the collector, to which it can then be fixed according to known methods.
• the collector has a substantially U-shaped section, whose branches form the lateral edges.
• the collector can also be made of aluminum or aluminum alloy.
• the invention also relates to a collector box which comprises a collector having the characteristics mentioned above, and a cover for closing the collector.
• the manifold and the lid both have a substantially U-shaped section.
• the branches of this U form respective lateral edges for the two collector pieces, the cover being adapted to be brazed on at least a portion of the lateral edges of the collector, in the vicinity of the end thereof.
• FIG. 1 is a partial side view of a heat exchanger comprising a manifold according to the invention
• FIG. 2 is a sectional view, on an enlarged scale, of the manifold on the line II-II of Figure 1;
• FIG. 3 is a partial sectional view along the line III-III of Figure 2, taken at one end of the manifold;
• FIG. 4 is a partial perspective view showing the ribs of the collector.
• FIG. 5 is a partial perspective view of a variant of FIG. 4.
• FIG. 1 shows a heat exchanger 10 comprising a manifold 12 according to the invention, in which open ends of tubes 14 of a heat exchange bundle.
• the tubes 14 are parallel flat tubes between which are arranged corrugated inserts 16 forming heat exchange fins.
• the exchanger 10 comprises an opposite header (not shown) similar to the manifold 12.
• the heat exchanger 10 finds particular application in motor vehicles and is designed to be made by soldering in a single operation while offering significant pressure and rupture performance.
• the manifold 12 consists of two nested metal parts intended to be assembled by brazing.
• the manifold 12 comprises a manifold 18 made in the form of a U-shaped metal element (for example aluminum or aluminum alloy) having a bottom wall or plate 20, provided with holes 22 for
• the manifold also has two lateral walls or lateral edges 24 connected to the plate 20.
• the side walls 24 of the manifold 18 forming the two branches of the U are of identical height, the height being able however to vary with respect to the bottom wall 20.
• the plate 20 is generally flat and it is the same side edges 24. The latter are connected to the plate 20 at an angle of about 90 °. This angle could be different.
• the connection of the plate 20 and the lateral edges 24 is effected by curved portions 26.
• the lateral edges 24 have a variable height in the vicinity of the end of the collector 18.
• the lateral edges 24 of the collector comprise two curved portions 28 which are each extend to the plate 20.
• the manifold 12 comprises another part, namely a lid 30 made in the form of a U-shaped metal element (for example aluminum or an aluminum alloy) having a bottom wall 32, extending in a plane parallel to the plane of extension of the plate 20, and two side walls 34 connected to the bottom wall 32.
• the lateral edges 34 of the lid are generally planar and make an angle of about 90 ° with the bottom wall 32.
• the side walls 34 of the cover 30 forming the two branches of the U may be of identical height.
• the cover 30 is fitted into the manifold 18 so that their respective U-profiles are oriented in the same direction, that is to say opposite the tubes 14 of the heat exchanger bundle.
• the cover 30 further comprises two end regions 36 (FIG. 3), each of which is curved in the direction of the plate 20 of the collector 18. In each of these end portions, the bottom wall 32 of the cover has a curved portion. 38 ends with a rim 40 clean to bear against the plate 20 of the manifold 18.
• the flange 40 is connected itself to a centered portion 42 of each side edge of the lid to close the manifold 12.
• the collector 12 is advantageously made by folding a metal sheet clean to impart a U-shaped profile, the holes 22 for the insertion of the tubes 14 being preferably made in the metal part after folding.
• the lid 30 is advantageously made by stamping, the end portions of the lid being also made in this stamping operation.
• Figure 4 is a partial perspective view of the manifold 12 which provides a better view of the distribution of the ribs.
• the collector 18 is stamped to form three distinct types of ribs at the plate 20, lateral edges 24 and curved portions 26.
• Ribs 50 are first made between each of the holes 22.
• the ribs 50 extend over the entire width of the plate 20, between the curved portions 26 of the lateral edges 24.
• the ribs 50 thus extend regularly over the length of the collector 18.
• the ribs 50 have a substantially V-shaped section, and are made outwardly of the box 12.
• the ribs 50 thus have a convexity extending substantially in the opposite direction to the direction of extension of the side edges.
• the ribs 50 thus form protrusions surrounding the holes 22.
• Each pair of ribs 50 surrounding a given hole 22 forms an insertion guide for the tubes 14, each using a branch of the V constituting it.
• ribs 50 Other types of section are possible for the ribs 50, to allow insertion further better tubes 14 while ensuring optimum rigidity to the manifold 18.
• Ribs 52 are formed in the curved portions 26. Like the ribs 50, the ribs 52 extend in the width direction of the plate 20, and they are each arranged opposite a rib 50 in the continuity of that -this.
• the ribs 52 are made towards the inside of the box 12.
• the ribs 52 thus have a convexity extending substantially in the direction of extension of the lateral edges 24.
• a region 54 makes it possible to connect each rib 50 to the rib 52 which is in its continuity and expresses itself in a substantially opposite direction.
• the ribs 52 can significantly increase the resistance to pressure and breaking. This aspect is all the more critical as, traditionally, the portions 26 constitute important weak points for the box-type manifolds 12.
• ribs 56 are formed in the lateral edges 24. Like the ribs 50 and 52, the ribs 56 extend in the width direction of the plate 20, and they are each arranged opposite a rib 52, in the continuity of this one.
• the ribs 56 are also formed towards the inside of the box 12.
• the ribs 56 thus have a convexity extending substantially in the direction of the opposite lateral edge.
• the ribs 56 extend over most of the lateral edges 24, up to a selected distance the end of the edges 24 which allows the housing and brazing of the cover 30 in the manifold 18.
• the ribs 50, 52 and 56 are not only in continuity with each other, but also continuous. These ribs thus form a rib which extends over the entire width of the collector 18, from a position close to the end of a lateral edge to another position close to the end of the opposite lateral edge, via the plate.
• all the holes 22 shown are bordered with ribs 50, 52 and 56, it is not excluded that the holes 22 at the ends of the plate 20 are bordered by a single rib 50, 52 or 56 or not at all.
• the ribs 50 and 52 are unchanged in their constitution and their arrangement.
• the ribs 56 are offset, and each disposed opposite a hole 22, that is to say alternately with a rib 52.
• the invention is not limited to heat exchangers whose collector boxes are made of aluminum or aluminum alloy. It can in particular apply to plastic plate and cover manifolds, ribs being made for example at the groove of the collector plate and between the holes therein.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Details Of Heat-Exchange And Heat-Transfer (AREA)
• Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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• 2005
  • 2005-11-02 FR FR0511181A patent/FR2892807B1/fr not_active Expired - Fee Related
• 2006
  • 2006-10-31 US US12/092,508 patent/US8997844B2/en active Active
  • 2006-10-31 PL PL06807681T patent/PL1957927T3/pl unknown
  • 2006-10-31 JP JP2008538355A patent/JP5084735B2/ja active Active
  • 2006-10-31 AT AT06807681T patent/ATE438833T1/de not_active IP Right Cessation
  • 2006-10-31 DE DE602006008345T patent/DE602006008345D1/de active Active
  • 2006-10-31 WO PCT/EP2006/067960 patent/WO2007051790A1/fr active Application Filing
  • 2006-10-31 EP EP06807681A patent/EP1957927B1/de active Active

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