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
  • 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
  • F28F9/0229—Double end plates; Single end plates with hollow spaces
• • 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
  • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
  • F28F2265/02—Safety or protection arrangements; Arrangements for preventing malfunction in the form of screens or 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
  • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
  • F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage
• • 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
  • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
  • F28F2275/122—Fastening; Joining by methods involving deformation of the elements by crimping, caulking or clinching

Definitions

• the invention relates to a heat exchanger, in particular for a motor vehicle.
• the tubes are generally tubes of circular, oval or oblong cross-section, defined by a major axis and a minor axis, and having ends inserted into orifices of a collecting plate.
• a brazed heat exchanger when the connection between the tubes and the collector plate is made by soldering. This connection is rigid and can not compensate for the expansion and shrinkage phenomena related to temperature variations during the use of the heat exchanger. Over time, due to these thermal expansions and retractions, the metal in which the tubes and the collector plate are formed can become fatigued and this can lead to the formation of cracks in the connection between the tubes and the collector plate and thus potentially generating leaks or breaks.
• a known solution is to have one or more flat reinforcing plates between the collector plate and the spacers. These flat reinforcing plates are generally brazed with the collector plate and the tubes in order to increase the resistance of the assembly to the efforts related to thermal expansion and retraction. However, such flat reinforcing plates may not be sufficient to reduce the risk of rupture or crack formation.
• One of the aims of the present invention is therefore to at least partially overcome the disadvantages of the prior art and to provide an improved heat exchanger.
• the present invention therefore relates to a heat exchanger comprising: 0 a tube bundle comprising a plurality of tubes arranged parallel to each other, said tube bundle comprises spacers arranged between the tubes,
• each header comprising a header plate, said header plate comprising openings within which the pipe ends are introduced, and a flange forming a groove for receiving a lid, and
• At least one reinforcing plate disposed between a manifold plate and the spacers in parallel with the collector plate and brazed against at least a portion of the tubes of the tube bundle and said collector plate, the at least one reinforcing plate having a wall lateral projection projecting towards the header plate and at least partially covering the rim of the header plate, said side wall being brazed against said rim of the header plate.
• the presence of the side wall further strengthens the connection between the tubes and the collector plate and reduces the risk of rupture or crack formation due to thermal variations but also because of the vibrations and the pressure of the first one. heat transfer fluid within the heat exchanger.
• the reinforcing plate comprises two parallel tongues and at least one base connecting the two tongues at one of their ends so as to form a space for receiving the tubes, the tongues being in contact with the slice of the tubes.
• the tongues of the reinforcing plate comprise complementary notches of the edge of the tubes.
• the receiving space of the tubes comprises spacers passing between two tubes and connecting the tongues of the reinforcing plate.
• the spacers of the tube receiving space fill the spacing between two tubes and are brazed with said tubes.
• the heat exchanger comprises, at the level of at least one collector, two reinforcing plates arranged opposite one another on a lateral side of the heat exchanger.
• the heat exchanger comprises, at the level of at least one collector, a single reinforcing plate whose side wall is brazed with the rim of the collector plate over the entire periphery. of said collector plate.
• the reinforcing plate has a skirt on at least a portion of the periphery of the tube receiving space, said skirt protruding towards the spacers.
• the skirt has a height corresponding at least to the distance between the reinforcing plate and the spacers.
• the side wall of the reinforcing plate has crimping tabs.
• FIG. 1 shows a schematic representation of a heat exchanger
• FIG. 2 shows a diagrammatic representation in front view of a collector of a heat exchanger
• FIG. 3 shows a schematic cross-sectional representation of a collector of a heat exchanger
• FIG. 4 shows a partial diagrammatic representation in perspective with respect to a collector of a heat exchanger
• FIG. 5 shows a partial schematic representation in top view of the reinforcing plate of a collector according to a first embodiment
• FIG. 6 shows a partial schematic representation in a top view of the reinforcement plate of a collector according to FIG. a second embodiment
• Figure 7 shows a partial schematic representation in top view of the reinforcing plate of a collector according to a third embodiment
• Figure 8 shows a partial schematic perspective view below the collector of FIG. 4 according to a first variant
• FIG. 9 shows a partial diagrammatic representation in perspective below the collector of FIG. 4 according to a second variant
• FIG. 10 shows a partial schematic representation in perspective from above of a collector of a heat exchanger according to another embodiment.
• FIG. 1 shows a heat exchanger 1, generally of parallelepipedal shape, comprising a bundle formed of a plurality of tubes 2 within which a first heat transfer fluid can circulate.
• the tubes 2 may be of circular section, or preferably of oval or oblong section, defined by a major axis and a minor axis, and are arranged parallel to each other.
• interleaves 6 are arranged which act as a disrupter and increase the heat exchange surface with a second heat transfer fluid passing between the tubes 2.
• the tubes 2 and the spacers 6 are generally made of metal.
• the tubes 2 and the spacers 6 forming the bundle are fixed together by brazing.
• the spacers 6 are for example corrugated or crenellated strips, placed between the tubes 2 and fixed to said tubes 2 by soldering. This is called a brazed beam.
• the heat exchanger 1 also comprises two collectors 3 (also called water boxes), a collector 3 being disposed at each end of the tubes 2. These collectors 3 each comprise a collector plate 4 and a cover 8 coming to cover the collector plate 4 and close the collector 3. These collectors 3 allow the collection and / or distribution of the first heat transfer fluid so that it circulates in the tubes 2.
• the header plate 4 makes the connection sealingly between the collector 3 and the tube bundle 2.
• the collector plate 4 can be made of metal.
• the header plate 4 may be of generally rectangular shape.
• the header plate 4 also comprises a plurality of orifices having a shape corresponding to the shape of the section of the tubes 2 and adapted to receive the ends of the tubes 2.
• the tubes 2 are fixed to the header plate 4 sealingly by soldering.
• the heat exchanger 1 also comprises at least one of its manifolds 3, at least one reinforcing plate 10 disposed between the header plate 4 and the inserts 6.
• This reinforcing plate 10 is positioned parallel to the collector plate 4 and soldered against at least a portion of the tubes 2 of the tube bundle 2 and against said collector plate 4.
• the reinforcement plate 10 makes it possible to reinforce both the collector plate 4 and the ends of the tubes 2 and thus reduces the risk of crack formation due to fatigue of the metal during the life of the heat exchanger 1.
• each manifold 3 comprises at least one reinforcing plate 10, however it is quite possible to imagine a heat exchanger 1 of which only one of the manifolds 3 comprises at least one reinforcing plate 10.
• the heat exchanger 1 comprises, at the level of at least one of its collectors 3, two reinforcing plates 10. These reinforcing plates 10 are arranged facing each other on a lateral side of the heat exchanger 1.
• the heat exchanger 1 comprises, at the level of at least one of its collectors 3, a single reinforcing plate 10.
• This single plate of reinforcement 10 has a surface at least equal to that of the header plate and its side wall 101 is brazed with the flange 41 of said header plate 4 over the entire periphery of the header plate 4.
• the tubes 2, the spacers 6 and the collector plates 4 and the reinforcing plates 10 being brazed, the latter are made of a metal material including aluminum or aluminum alloy.
• FIG. 3 which is a diagrammatic representation of a cross-section of a collector 3
• the collector plate 4 comprises over its entire periphery a rim 41 rising towards the cover 8 so as to form a groove 42 in which inserting the cover 8.
• a seal (not shown) is inserted in this groove 42 to seal between the cover 8 and the header plate 4.
• the cover 8 is held against the header plate 4 by crimping tabs 43 disposed on the flange 41 and folded over a shoulder of the cover 8.
• the reinforcing plate 10 comprises in particular a side wall 101 projecting towards the header plate 4 and at least partially covering the rim 41 of the header plate 4.
• This side wall 101 is brazed against said rim 41 of the header plate 4.
• the presence of the side wall 101 further strengthens the connection between the tubes 2 and the collector plate 4 and reduces the risk of rupture or formation of cracks due to thermal variations but also because of the vibrations and the pressure of the first coolant within the heat exchanger 1.
• the side wall 101 covers the flange 41 over its entire height, especially until the crimping tabs 43 are born.
• the plate of reinforcement 10 may be brazed with the face of the collector plate facing tabs 6, more particularly at the groove 42.
• FIG. 4 shows a partial schematic representation in perspective of the collector 3 of the heat exchanger 1.
• the side wall 101 of the reinforcing plate 10 covers the rim 41 of the collector plate 4 in a continuous manner. that is to say on the whole periphery of the reinforcing plate 10.
• the collector plate 4 may also comprise, on the lateral sides of the heat exchanger 1, a lateral flap 44 which is folded towards the bundle of tubes 2 so as to maintain a lateral cheek 12 serving in particular to the attachment of the heat exchanger 1 to its location in the motor vehicle.
• FIG. 5 shows in more detail a reinforcing plate 10.
• the reinforcing plate 10 comprises in particular two parallel tabs 10a, 10b and at least one base 10c connecting the two tabs 10a, 10b at one of their ends. These tabs 10a, 10b and the base or bases 10c are in particular placed in a plane parallel to that of the header plate 4.
• the tongues 10a and 10b are respectively placed against the front and rear faces of the heat exchanger 1 and the base 10c against a lateral side of said heat exchanger 1.
• the tabs 10a, 10b and the at least one base 10c form a receiving space 103 of the tubes 2 in the center of the reinforcing plate 10. At this receiving space 103 , the tabs 10a, 10b are in contact with the edge of the tubes 2.
• the tongues 10a, 10b of the reinforcing plate 10 may comprise notches 105 complementary to the edge of the tubes 2.
• the heat exchanger 1 comprises, at the level of at least one of its collectors 3, two reinforcing plates 10, said reinforcing plates 10 comprise only one base 10c and have a generally U-shaped shape in a plane parallel to that of the 4.
• said reinforcing plates 10 comprise two bases 10c and have a generally parallelepipedal shape with the receiving space 103 in the center.
• the reinforcing plate 10 is formed in one piece for example by stamping and the side wall 101 is made of material with said reinforcing plate 10 and in particular with the tabs 10a, 10b and the base 10c. .
• the receiving space 103 of the tubes 2 comprises spacers 104 passing between two tubes 2 and connecting the tongues 10a, 10b of the reinforcing plate 10. As shown in FIG. 6, these spacers 104 may not be in contact with the tubes 2 in order to limit the increase in the mass of the heat exchanger 1 due to the presence of the reinforcing plate 10.
• the spacers 104 of the receiving space 103 fill the spacing between two tubes 2 and are brazed with said tubes 2.
• This variant allows in particular to increase the brazing surface between the plate of reinforcement 10 and the tubes 2 and thus strengthen them even more.
• the reinforcing plate 10 may also comprise a skirt 102 on at least a portion of the periphery of the receiving space 103 of the tubes 2. This skirt 102 projects in the direction of the spacers 6 of the bundle of tubes 2.
• This skirt 102 makes it possible in particular to further increase the brazing surface between the reinforcing plate 10 and the tubes 2 and thus to reinforce them even more.
• this skirt 102 makes it possible to limit the circulation of the second heat transfer fluid in the space between the inserts 6 and the collector 3 and thus improves the performance of the heat exchanger 1 by forcing the second heat transfer fluid to circulate in the inserts 6 where the exchange surface is larger.
• the skirt 102 has preferably a height at least corresponding to the distance between the reinforcing plate 10 and the spacers 6.
• the skirt 102 may be present only on a portion of the periphery of the receiving space 103, more particularly only at the tabs 10a, 10b.
• the skirt 102 may also be present all around the periphery of the reception space 103 and thus be present both at the tabs 10a, 10b but also at the base or bases 10c, as illustrated in FIG.
• FIG. 10 shows an embodiment of the reinforcing plate 10 where the side wall 101 further includes crimping tabs 106. These crimping tabs 106 of the reinforcing plate 10 are placed between the crimping tabs 43 of the plate collector 4 and reinforce the maintenance of the cover 8 against the collector plate 4. Thus, it is clear that the heat exchanger 1 according to the invention, allows a better resistance of the collector plate 4 and the tubes 2 due to the presence the reinforcing plate 10 and its side wall 101.

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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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=58010067

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (15)

• 2016
  • 2016-12-19 FR FR1662716A patent/FR3060726B1/fr not_active Expired - Fee Related
• 2017
  • 2017-12-18 CN CN201780086733.3A patent/CN110392816A/zh active Pending
  • 2017-12-18 WO PCT/FR2017/053665 patent/WO2018115692A1/fr active Application Filing
  • 2017-12-18 EP EP17829246.2A patent/EP3555545A1/de not_active Withdrawn
  • 2017-12-18 US US16/471,294 patent/US20200056849A1/en not_active Abandoned

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