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
  • F28F9/0246—Arrangements for connecting header boxes with flow lines
• • 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
  • F28F9/0246—Arrangements for connecting header boxes with flow lines
  • F28F9/0248—Arrangements for sealing connectors to 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
  • F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove
  • F28F2275/146—Fastening; Joining by using form fitting connection, e.g. with tongue and groove with bayonet connections

Definitions

• the invention relates to heat exchangers, in particular for a motor vehicle.
• It relates more particularly to a manifold for a brazed heat exchanger comprising walls which delimit a chamber, one of the walls of the chamber being provided with an opening, a tube being connected to this opening.
• the collector plate also called a hole plate, has a multiplicity of holes in which are received the ends of tubes which constitute the bundle of the heat exchanger. These tubes are associated with fins helping to increase the heat exchange surface.
• the collector plate is formed by a wall which delimits a chamber communicating with the tubes to allow the circulation of a heat transfer fluid in the bundle.
• One of the walls of the chamber is provided with at least one tubing to allow the entry or exit of the heat transfer fluid.
• Brazed heat exchangers include a harness mounted between two manifolds.
• the beam is formed by a multiplicity of tubes arranged parallel to each other and alternating with spacers.
• These spacers are of corrugated type, that is to say that they are formed from a metal strip deformed to form corrugations.
• a spacer disposed between two adjacent tubes comes into respective contact of the two tubes by end regions of the corrugations.
• the heat exchanger further comprises two cheeks, also called crosspieces, which frame the bundle and are arranged parallel to the tubes.
• the different parts are formed of a metallic material coated externally with a brazing alloy.
• the present invention aims to provide a manifold, and a heat exchanger comprising such a box, which allow rapid and inexpensive temporary fixing of the tubing in an opening of a wall of the manifold.
• the tube has at least one lug and by the fact that the orifice has at least one notch allowing the lug to pass through the tube.
• the tubing can be temporarily held in the opening by the lug or lugs after rotation of the tubing in one opening.
• the tubing is introduced manually or automatically into the opening, the lug (s) being placed opposite the corresponding notches formed on the periphery of the opening. Then the tubing is turned angularly by a certain angle so that the lug (s) are no longer facing the notches. Thus the tubing is temporarily held on the manifold stably during the passage of the exchanger in the furnace.
• the tubing comprises at least two lugs.
• the tubing comprises three lugs arranged at 120 ° from one another.
• the opening will then also include three notches arranged at 120 ° from one another.
• the number of notches is equal to the number of lugs of the tube, but this characteristic is not essential.
• the number of notches can also be a multiple of the number of pins. One can imagine for example that the opening has six notches arranged at 60 ° from one another, which would limit the angle of rotation necessary to introduce the pins in the notches.
• the tubing is bent and must extend in a given direction to be fitted with a flexible conduit. In this case, it is necessary to respect a precise angular orientation of the tubing relative to the manifold. If the tubing is mounted manually, the wall of the chamber which includes the opening is preferably provided with a stop which limits the rotation of the tubing by cooperation with a lug.
• Means are provided for immobilizing the tubing in a final position of its rotational movement, by tightening in the direction of its axis of rotation.
• Said immobilization means comprise a ramp formed on the internal face of said wall so as to cooperate with a lug, and a radial projection formed on the tubing opposite the external face of the wall so as to gradually tighten the wall provided of the ramp between said projection and the lug, when approaching said final position.
• Said stopper is arranged so as to stop said rotational movement in said final position.
• the internal face of the wall has a projection juxtaposed with a notch in the circumferential direction so as to cooperate with a lug having " crossed this notch to allow a rotational movement only in a determined direction.
• FIG. 1 is a partial perspective view of a manifold for a heat exchanger according to the invention, comprising a tube during assembly;
• FIG. 2 is another partial perspective view similar to Figure 1;
• Figures 3 and 4 are enlarged views similar to Figure 2 showing the tubing respectively before and after assembly;
• FIG. 5 is a longitudinal sectional view of a tube, also showing in section part of the wall of the manifold in the opening of which the end of the tube has just been introduced;
• Figure 5a is an enlarged detail of Figure 5;
• Figure 6 is a view similar to Figure 5a, showing the tubing at the end of its rotational movement
• FIG. 7 is a perspective view showing the tubing in its final position and the adjacent part of the wall of the manifold.
• FIG. 8 is an elevational view of the region of the wall shown in Figures 5 to 7 having the opening.
• the manifold comprises a first part 10 and a second part 12, each formed from a metal sheet, advantageously made of aluminum, which is shaped by conventional cutting and stamping operations.
• the first part 10 has a bottom 14 which is generally flat and of elongated rectangular shape.
• This bottom 14 is intended to constitute the collecting plate, also called “plate with holes", of the collecting box.
• This bottom comprises for this purpose a plurality of spaced holes 16 of elongated shape intended to receive tubes 18 forming part of the bundle of the heat exchanger. In the example described, these are flat tubes 18 between which are arranged fins 20 made in the form of corrugated spacers.
• the part 10 further comprises two lateral sides 22 folded opposite, and which are generally planar and parallel to each other. These sides are connected substantially perpendicular to the bottom 14 by two fold lines 24 which are parallel to each other.
• the lateral flanks 22 have in their central part respective extensions 26 and 28.
• the extension 26 has an opening 30 while the extension 28 is completely closed.
• the opening 30 is circular in shape and is intended to allow the fitting of a tube 32 of circular section.
• the second part 12 fits on the lateral flanks 22 so that these two parts jointly delimit a closed volume which communicates with the tubes 18 of the bundle. It will be understood that it is thus possible to produce, in a single brazing operation, a heat exchanger comprising a bundle formed by a multiplicity of tubes and fins, at the same time as one or two manifolds.
• FIG. 2 shows a perspective view of the respective extensions 26 and 28 of the lateral flanks 22. It can be seen that the opening 30, formed in the extension 26, has notches 34, which are three in number in the embodiment shown. The notches 34 are arranged at 120 ° from one another. The end of the tubing 32 which engages in the opening 30 comprises three lugs 36, also arranged at 120 ° from one another. These lugs form protrusions projecting towards the outside of the tubing.
• the tubing 32 includes a flange 40 which limits the penetration of the tubing in the opening 30.
• the tubing is turned in one direction or the other by a certain angle, for example 10 or 20 ° ( as shown by arrow F2 in FIG. 4), so that the pins are no longer facing the notches 34.
• the tubing is thus held sufficiently tightly on the manifold so that it is possible to perform the brazing operation without it moving.
• the pins 36 are shaped so that a slight tightening of the tube on the wall 26 is obtained.
• the tubing 32 instead of being straight cylindrical as shown in the example, has a bent shape. In this case " , it should be arranged in a precise angular orientation relative to the manifold in order to connect it to a flexible pipe of the fluid circulation circuit. If the tubing is introduced by a robot, the latter can be adjusted by so as to give a suitable angular orientation and no additional measure is necessary. If the tubing is introduced manually by an operator, the wall 26 will preferably include a boss 42 ( Figures 3 and 4), obtained for example by punching, and forming a stop which limits the rotational movement of the tubing relative to the manifold When one of the lugs 36 abuts against the boss 42, the suitable angle of rotation is obtained. It is important that the notches 34 have a small dimension so that they can be filled with the brazing alloy during the brazing operation.
• FIGs 5 to 8 illustrate a variant of the heat exchanger according to the invention, in which means are provided for immobilizing by clamping the tubing in the final position of its rotational movement, defined by the stop of the wall, so as to avoid reversing this movement.
• Figures 7 and 8 for clarity, only a square region of the wall, concentric with the opening, is shown.
• the tubing 50 is bent and its end 52 which engages in the manifold here has a single lug 54, associated with a single notch 56 of the generally circular opening 58 through which the tubing passes.
• a stop 60 analogous to the stop 42 of FIGS. 3 and 4 is formed at the edge of the opening 58, at an angular distance from the notch 56, around the axis A of the opening, slightly greater than 90 ° from so as to limit the rotation of the tubing to an angle of 90 ° counterclockwise, as seen from the inside of the manifold, according to arrow F in Figure 8.
• a ramp 62 is juxtaposed with the stop 60, at an angular distance of 90 ° relative to the notch 56.
• the ramp 62 like the stop 60, is produced by deformation, in the direction of the axis A, of the wall 64 of the manifold, in which the opening 58 is formed.
• the gap 66 which axially separates the lug 54 from the flange 68, similar to the flange 40 of FIGS. 1 to 4, of the tube 50 has a width greater than the thickness of the wall 64, so that the tubing can rotate freely around the axis A after the lug has been engaged through the notch 56.
• the lug After a rotation of an angle close to 90 ° , the lug reaches opposite the ramp 62, which has, opposite it, an inclined surface 70 so as to gradually move away from the plane of the external face 72, facing the flange 68, from the wall 64, up to a maximum distance very slightly greater than the width of the gap 66 so as to achieve an axial tightening of the wall 64 between the lug 54 and the flange 68, after a rotation of 90 °, while the lug 54 comes to bear in the circumferential direction on the stop 60, which projects to a distance from the wall 72 substantially greater than the width of the gap 66.
• a projection 74 similar to the stop 60 is produced by deformation of the wall 64, in a position slightly offset from the notch 56 in the opposite direction to that of the rotational movement of the tubing. This projection cooperates with the lug 54 to prevent a rotational movement of the tubing in the wrong direction during its manual positioning.
• clamping means comprising the ramp 62 and the polarization means comprising the projection 74, although incorporated here in the same embodiment, can be implemented independently of each other.
• both and / or the others can be used in combination with a multiplicity of lugs as described in the first embodiment.
• the heat exchanger of the invention can be used in particular to constitute a radiator for cooling the engine or a radiator for heating the passenger compartment of a motor vehicle.

Landscapes

• 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)
• Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Applications Claiming Priority (3)

Publications (3)

Family

ID=32044412

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (8)

Family Cites Families (14)

• 2001
  • 2001-05-28 EP EP01938354A patent/EP1285212B2/de not_active Expired - Lifetime
  • 2001-05-28 JP JP2002500175A patent/JP4718752B2/ja not_active Expired - Lifetime
  • 2001-05-28 WO PCT/FR2001/001639 patent/WO2001092807A1/fr not_active Ceased
  • 2001-05-28 DE DE60100862T patent/DE60100862T3/de not_active Expired - Lifetime

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events