WO2018078253A1 - Heat exchanger and method for manufacturing a heat exchanger - Google Patents

Heat exchanger and method for manufacturing a heat exchanger Download PDF

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Publication number
WO2018078253A1
WO2018078253A1 PCT/FR2017/052897 FR2017052897W WO2018078253A1 WO 2018078253 A1 WO2018078253 A1 WO 2018078253A1 FR 2017052897 W FR2017052897 W FR 2017052897W WO 2018078253 A1 WO2018078253 A1 WO 2018078253A1
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WO
WIPO (PCT)
Prior art keywords
connector
tubing
heat exchanger
shock wave
pipe
Prior art date
Application number
PCT/FR2017/052897
Other languages
French (fr)
Inventor
Christophe Chevallier
Georges De Pelsemaeker
Frédéric MESLIN
Jean-Yves HASCOET
Original Assignee
Valeo Systemes Thermiques
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Publication date
Application filed by Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2018078253A1 publication Critical patent/WO2018078253A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
    • B21D26/12—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal

Definitions

  • the invention relates to a heat exchanger and a method of manufacturing a heat exchanger.
  • Patent application US 201 1/0239696 discloses an evaporator which allows a heat exchange between the refrigerant circulating in the evaporator and the air flow intended to be delivered inside the passenger compartment which passes through the evaporator prior to its distribution inside the passenger compartment through an air distribution mouth of the air conditioning.
  • the evaporator has tubings for supplying and discharging refrigerant fluid.
  • the invention aims in particular to improve the mounting of the tubing or pipes.
  • the subject of the invention is therefore a method for manufacturing a heat exchanger comprising a bundle of heat exchange channels in which a cooling fluid circulates, this exchanger being connected to at least one tubing, in particular an aluminum tubing, arranged for supplying or discharging the cooling fluid, the method comprising the following steps:
  • this connector possibly being a component of the heat exchanger or a remote component mounted at one end of the pipe opposite the heat exchanger,
  • the invention advantageously provides rapid expansion of the tubing and an assembly without temperature effect, to maintain the mechanical properties of the material of the connector, or block, in its initial state.
  • the hydro-magneto-forming is carried out using an electrical device provided with electrodes and a tank of liquid, in particular water, the electrodes being arranged to generate a shock wave causing hydro-magneto forming.
  • the electric current flowing in the electrodes is chosen between 100 and 600 kAmp.
  • the electrical device comprises a pulse generator of 40 to 800 microF and 3 to 15 kV, connected to the electrodes.
  • the shock wave is of ultra fast formation, time ranging from 40 to 120 m / s.
  • the forming takes between 10 and 100 micro seconds.
  • the electrical device comprises a piston for generating a secondary shock wave being pushed by the shock wave generated in the water by the electrodes, this secondary shock wave being able to assemble the tubing with the connector.
  • the material of the tubing is deformed under the action of this secondary shock wave and this deformed material by meeting the connector crushes against this connector and the energy thus released allows a fusion of material between the tubing and the connector. This achieves a kind of welding.
  • the device comprises a wave amplifier formed of two cylinders of different diameters in which the piston moves.
  • the piston has a nose capable of pushing the liquid.
  • the nose has a cavity for containing liquid that participates in the creation of the secondary shock wave.
  • This cavity serves as a thrust surface.
  • the nose by its geometric dimensions, can allow an amplification of the shock wave of a factor greater than 3.
  • two sealing zones are provided.
  • the one or more sealing zones are formed with the aid of an annular seal.
  • the sealing zone at the outlet of the connector is in contact with the inside of the tubing.
  • the region delimited between these two sealing zones is arranged to be filled with liquid in which a secondary shock wave is generated.
  • the tubing has an internal diameter of between 7 mm and 14 mm, and a thickness of between 1 mm and 1.5 mm.
  • the tubing and the connector are made of aluminum.
  • the invention further relates to an exchanger obtained by the method according to one of the preceding claims.
  • the connector may be an interface flange on the exchanger.
  • the connector may be a block mounted at one end of the tubes.
  • the exchanger is an evaporator or a condenser for the air conditioning system, or any other heat exchange device such as a water cooler or chiller.
  • the invention also relates to a heat exchanger, in particular for an air conditioning system, in particular a motor vehicle, obtained according to the method described above, this heat exchanger comprising:
  • a connector arranged to be in fluid communication with at least one of the channels of the beam
  • connection tubing mounted on the connector by hydro-magneto forming.
  • FIG. 1 diagrammatically and partially illustrates an evaporator according to an exemplary embodiment of the invention
  • FIG. 1 a illustrates, schematically and partially, a connector block
  • FIG. 2 illustrates, schematically and partially, the implementation of the method according to the invention.
  • FIG. 2a illustrates a detail of FIG. 2.
  • FIG. 1 shows a heat exchanger 1 according to the invention.
  • This heat exchanger can be used in particular as an evaporator of an air conditioning circuit of a motor vehicle, in which a first fluid circulates, such as a coolant in the supercritical state, such as CO2 in particular.
  • the heat exchanger 1 is for example intended to condition a second fluid, such as the flow of air to the passenger compartment of the motor vehicle, by heat exchange with the refrigerant circulating in the heat exchanger.
  • the heat exchanger 1 is for example placed inside an air conditioning unit generally located in the passenger compartment of the vehicle.
  • the refrigerant evaporating within the heat exchanger 1 working in evaporator captures caloric energy from the air flow to the passenger compartment, to allow the passage of refrigerant from a liquid phase to a gas phase.
  • the heat exchanger 1 comprises a stack of tubes or heat exchange channels 3 stacked.
  • the beam also has two closure plates 5 on either side of the heat exchange tubes 3, that is to say at the longitudinal ends of the beam. At least one of the closure plates 5 has at least one orifice which opens into a tubing 7 or 9 for the supply or delivery of refrigerant fluid.
  • the closure plates 5 are absent.
  • the connector 10 has a passage 14 to partially receive the tubing 7; 9, as shown in Figure 2a.
  • the method according to the invention described in FIG. 2 comprises the following steps:
  • the hydro-magneto-forming is carried out using an electrical device 20 provided with electrodes 21 and 22 and a tank of liquid 23, water in the example described, the electrodes being arranged to generate a shock wave W causing the hydro-magneto forming.
  • the electric current flowing between the electrodes 21 and 22 is chosen between 100 and 600 kAmp.
  • the electrical device 20 comprises a pulse generator 24 of
  • the shock wave is ultra fast formation, time ranging from 40 to 120 m / s and the forming takes between 10 and 100 micro seconds.
  • the electrical device 20 comprises a piston 25 for generating a secondary shock wave WS being pushed by the shock wave generated in the water by the electrodes 21 and 22, this secondary shock wave being able to assemble the tubing 7, 9 with the connector 10.
  • the material of the tubing 7, 9 deforms under the action of this secondary shockwave WS and this deformed material by meeting the connector crushes against this connector and the energy thus released allows a melting of material between the tubing and the connector. This achieves a kind of welding.
  • the device 20 comprises a wave amplifier formed of a cylinder 28 in which the piston 25 moves.
  • the piston 25 has a nose 30 adapted to push the liquid.
  • This nose 30 has a cavity 31 for containing liquid that participates in the creation of the secondary shock wave. This cavity serves as a thrust surface.
  • Two sealing zones 33 and 34 are provided.
  • the sealing zones 33 and 34 are formed with the aid of two annular seals 37.
  • the sealing zones 33 and 34 at the outlet of the connector 10 are in contact with the inside of the tubing 7, 9.
  • the region delimited between these two sealing zones 33 and 34 is arranged to be filled with liquid in which a secondary shock wave is generated.
  • the tubing 7, 9 has an internal diameter of between 7 mm and 14 mm, and a thickness of between 1 mm and 1.5 mm.

Abstract

The invention concerns a method for manufacturing a heat exchanger comprising a bundle of heat exchanger channels in which a coolant circulates, this exchanger being connected to at least one pipe, in particular an aluminium pipe, arranged to supply or discharge the coolant, the method comprising the following steps: - providing a connector (10) arranged to be in fluidic communication with the pipe, it being possible for this connector to be a component of the exchanger or to be a remote component mounted at an end of the pipe opposite the exchanger, - providing a connecting pipe (7; 9) on the connector so as to allow a fluidic connection between them, - assembling the pipe with the connector by expanding the pipe in the connector by magnetohydraulic forming.

Description

Echangeur thermique et procédé de fabrication d'un échangeur thermique  Heat exchanger and method of manufacturing a heat exchanger
L'invention concerne un échangeur thermique et un procédé de fabrication d'un échangeur thermique. The invention relates to a heat exchanger and a method of manufacturing a heat exchanger.
On connaît par la demande de brevet US 201 1/0239696 un évaporateur qui permet un échange thermique entre le fluide réfrigérant circulant dans l'évaporateur et le flux d'air destiné à être délivré à l'intérieur de l'habitacle qui traverse l'évaporateur préalablement à sa distribution à l'intérieur de l'habitacle à travers une bouche de distribution d'air de la climatisation. L'évaporateur comporte des tubulures pour l'alimentation et le refoulement en fluide réfrigérant. Patent application US 201 1/0239696 discloses an evaporator which allows a heat exchange between the refrigerant circulating in the evaporator and the air flow intended to be delivered inside the passenger compartment which passes through the evaporator prior to its distribution inside the passenger compartment through an air distribution mouth of the air conditioning. The evaporator has tubings for supplying and discharging refrigerant fluid.
Il est en outre connu d'assembler une tubulure avec un bloc par collage-assemblage mécanique. L'invention vise notamment à améliorer le montage de la ou des tubulures. It is further known to assemble a tubing with a block by mechanical bonding. The invention aims in particular to improve the mounting of the tubing or pipes.
L'invention a ainsi pour objet un procédé de fabrication d'un échangeur thermique comportant un faisceau de canaux d'échange thermique dans lesquels circule un fluide de refroidissement, cet échangeur étant relié à au moins une tubulure, notamment une tubulure en aluminium, agencée pour l'alimentation ou le refoulement du fluide de refroidissement, le procédé comportant les étapes suivantes : The subject of the invention is therefore a method for manufacturing a heat exchanger comprising a bundle of heat exchange channels in which a cooling fluid circulates, this exchanger being connected to at least one tubing, in particular an aluminum tubing, arranged for supplying or discharging the cooling fluid, the method comprising the following steps:
- fournir un connecteur agencé pour être en communication fluidique avec la tubulure, ce connecteur pouvant être un composant de l'échangeur ou être un composant déporté monté à une extrémité de la tubulure opposée à l'échangeur, providing a connector arranged to be in fluid communication with the pipe, this connector possibly being a component of the heat exchanger or a remote component mounted at one end of the pipe opposite the heat exchanger,
- disposer une tubulure de raccordement sur le connecteur en vue de permettre une liaison fluidique entre eux, assembler la tubulure avec le connecteur par expansion de la tubulure dans le connecteur par hydro-magnéto formage. arranging a connecting pipe on the connector in order to allow a fluid connection between them, assemble the tubing with the connector by expanding the tubing in the connector by hydro-magneto forming.
L'invention assure avantageusement l'expansion rapide de la tubulure et un assemblage sans effet de température, permettant de conserver les propriétés mécaniques de la matière du connecteur, ou bloc, dans son état initial. The invention advantageously provides rapid expansion of the tubing and an assembly without temperature effect, to maintain the mechanical properties of the material of the connector, or block, in its initial state.
Selon un aspect de l'invention, l'hydro-magnéto formage est réalisé à l'aide d'un dispositif électrique pourvu d'électrodes et d'une cuve de liquide, notamment de l'eau, les électrodes étant agencés pour générer une onde de choc provoquant l'hydro-magnéto formage. According to one aspect of the invention, the hydro-magneto-forming is carried out using an electrical device provided with electrodes and a tank of liquid, in particular water, the electrodes being arranged to generate a shock wave causing hydro-magneto forming.
Selon un aspect de l'invention, le courant électrique circulant dans les électrodes est choisi compris entre 100 et 600 kAmpères. According to one aspect of the invention, the electric current flowing in the electrodes is chosen between 100 and 600 kAmp.
Selon un aspect de l'invention, le dispositif électrique comporte un générateur d'impulsion de 40 à 800 microF et de 3 à 15 kV, relié aux électrodes. According to one aspect of the invention, the electrical device comprises a pulse generator of 40 to 800 microF and 3 to 15 kV, connected to the electrodes.
Selon un aspect de l'invention, l'onde de choc est de formation ultra rapide, de temps compris de 40 à 120 m/s. According to one aspect of the invention, the shock wave is of ultra fast formation, time ranging from 40 to 120 m / s.
Selon un aspect de l'invention, le formage dure entre 10 et 100 micro secondes. According to one aspect of the invention, the forming takes between 10 and 100 micro seconds.
Selon un aspect de l'invention, le dispositif électrique comporte un piston pour générer une onde de choc secondaire en étant poussé par l'onde de choc généré dans l'eau par les électrodes, cette onde de choc secondaire étant capable assembler la tubulure avec le connecteur. La matière de la tubulure se déforme sous l'action de cette onde de choc secondaire et cette matière déformée en rencontrant le connecteur s'écrase contre ce connecteur et l'énergie ainsi dégagée permet une fusion de matière entre la tubulure et le connecteur. Ceci réalise une sorte de soudure. According to one aspect of the invention, the electrical device comprises a piston for generating a secondary shock wave being pushed by the shock wave generated in the water by the electrodes, this secondary shock wave being able to assemble the tubing with the connector. The material of the tubing is deformed under the action of this secondary shock wave and this deformed material by meeting the connector crushes against this connector and the energy thus released allows a fusion of material between the tubing and the connector. This achieves a kind of welding.
Selon un aspect de l'invention, le dispositif comporte un amplificateur d'onde formé de deux cylindres de diamètres différents dans lesquels se déplace le piston. According to one aspect of the invention, the device comprises a wave amplifier formed of two cylinders of different diameters in which the piston moves.
Selon un aspect de l'invention, le piston comporte un nez apte à pousser le liquide. According to one aspect of the invention, the piston has a nose capable of pushing the liquid.
Selon un aspect de l'invention, le nez présente une cavité pour contenir du liquide qui participe à la création de l'onde de choc secondaire. Cette cavité sert comme surface de poussée. According to one aspect of the invention, the nose has a cavity for containing liquid that participates in the creation of the secondary shock wave. This cavity serves as a thrust surface.
Le nez, par ses dimensions géométriques, peut permettre une amplification de l'onde de choc d'un facteur supérieur à 3. The nose, by its geometric dimensions, can allow an amplification of the shock wave of a factor greater than 3.
Selon un aspect de l'invention, deux zones d'étanchéité sont prévues. Selon un aspect de l'invention, la ou les zones d'étanchéité sont formées avec l'aide d'un joint annulaire. According to one aspect of the invention, two sealing zones are provided. According to one aspect of the invention, the one or more sealing zones are formed with the aid of an annular seal.
Selon un aspect de l'invention, la zone d'étanchéité à la sortie du connecteur est en contact avec l'intérieur de la tubulure. According to one aspect of the invention, the sealing zone at the outlet of the connector is in contact with the inside of the tubing.
Selon un aspect de l'invention, la région délimitée entre ces deux zones d'étanchéité est agencée pour être rempli de liquide dans lequel une onde de choc secondaire est générée. According to one aspect of the invention, the region delimited between these two sealing zones is arranged to be filled with liquid in which a secondary shock wave is generated.
Selon un aspect de l'invention, la tubulure présente un diamètre intérieur compris entre 7 mm et 14 mm, et une épaisseur comprise entre 1 mm et 1 .5 mm. Selon un aspect de l'invention, la tubulure et le connecteur sont réalisés à base d'aluminium. According to one aspect of the invention, the tubing has an internal diameter of between 7 mm and 14 mm, and a thickness of between 1 mm and 1.5 mm. According to one aspect of the invention, the tubing and the connector are made of aluminum.
L'invention a encore pour objet un échangeur obtenu par le procédé selon l'une des revendications précédentes. Le connecteur peut être une bride d'interface sur l'échangeur. En variante, le connecteur peut être un bloc monté à une extrémité des tubulures. The invention further relates to an exchanger obtained by the method according to one of the preceding claims. The connector may be an interface flange on the exchanger. Alternatively, the connector may be a block mounted at one end of the tubes.
Selon un aspect de l'invention, l'échangeur est un évaporateur ou un condenseur pour le système de climatisation, ou tout autre dispositif d'échange thermique tel qu'un refroidisseur d'eau ou chiller. According to one aspect of the invention, the exchanger is an evaporator or a condenser for the air conditioning system, or any other heat exchange device such as a water cooler or chiller.
L'invention concerne encore un échangeur thermique, notamment pour un système de climatisation, notamment de véhicule automobile, obtenu selon le procédé décrit ci-dessus, cet échangeur thermique comportant : The invention also relates to a heat exchanger, in particular for an air conditioning system, in particular a motor vehicle, obtained according to the method described above, this heat exchanger comprising:
un faisceau de canaux d'échange thermique dans lesquels circule un fluide de refroidissement,  a bundle of heat exchange channels in which circulates a cooling fluid,
un connecteur agencé pour être en communication fluidique avec l'un au moins des canaux du faisceau,  a connector arranged to be in fluid communication with at least one of the channels of the beam,
- une tubulure de raccordement monté sur le connecteur par hydro-magnéto formage. - A connection tubing mounted on the connector by hydro-magneto forming.
L'invention sera mieux comprise et d'autres détails, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante faite à titre d'exemples non limitatifs en référence au dessin annexé dans lequel : The invention will be better understood and other details, characteristics and advantages of the invention will become apparent on reading the following description given by way of nonlimiting example with reference to the appended drawing in which:
- la figure 1 illustre, schématiquement et partiellement, un évaporateur selon un exemple de réalisation de l'invention,  FIG. 1 diagrammatically and partially illustrates an evaporator according to an exemplary embodiment of the invention;
- la figure 1 a illustre, schématiquement et partiellement, un bloc connecteur,  FIG. 1 a illustrates, schematically and partially, a connector block,
- la figure 2 illustre, schématiquement et partiellement, la mise en œuvre du procédé selon l'invention, et  FIG. 2 illustrates, schematically and partially, the implementation of the method according to the invention, and
- la figure 2a illustre un détail de la figure 2. On a représenté sur la figure 1 un échangeur thermique 1 selon l'invention. Cet échangeur thermique peut être notamment utilisé en tant qu'évaporateur d'une boucle de climatisation d'un véhicule automobile, dans laquelle circule un premier fluide, tel qu'un fluide réfrigérant à l'état supercritique, tel que du CO2 notamment. FIG. 2a illustrates a detail of FIG. 2. FIG. 1 shows a heat exchanger 1 according to the invention. This heat exchanger can be used in particular as an evaporator of an air conditioning circuit of a motor vehicle, in which a first fluid circulates, such as a coolant in the supercritical state, such as CO2 in particular.
L'échangeur thermique 1 est par exemple destiné à conditionner un deuxième fluide, tel que le flux d'air à destination de l'habitacle du véhicule automobile, par échange thermique avec le fluide réfrigérant circulant dans l'échangeur thermique. L'échangeur thermique 1 est par exemple placé à l'intérieur d'un boîtier de climatisation généralement situé dans l'habitacle du véhicule.  The heat exchanger 1 is for example intended to condition a second fluid, such as the flow of air to the passenger compartment of the motor vehicle, by heat exchange with the refrigerant circulating in the heat exchanger. The heat exchanger 1 is for example placed inside an air conditioning unit generally located in the passenger compartment of the vehicle.
Lorsque la boucle de climatisation fonctionne de façon à refroidir le flux d'air à destination de l'habitacle, le fluide réfrigérant s'évaporant au sein de l'échangeur thermique 1 travaillant en évaporateur capte de l'énergie calorique du flux d'air à destination de l'habitacle, afin de permettre le passage du fluide réfrigérant d'une phase liquide à une phase gazeuse.  When the air conditioning loop operates to cool the flow of air to the passenger compartment, the refrigerant evaporating within the heat exchanger 1 working in evaporator captures caloric energy from the air flow to the passenger compartment, to allow the passage of refrigerant from a liquid phase to a gas phase.
Selon l'exemple illustré, l'échangeur thermique 1 comprend un faisceau de tubes ou canaux d'échange thermique 3 empilés.  According to the illustrated example, the heat exchanger 1 comprises a stack of tubes or heat exchange channels 3 stacked.
Le faisceau présente en outre deux plaques de fermeture 5 de part et d'autre des tubes d'échange thermique 3, c'est-à-dire aux extrémités longitudinales du faisceau. Au moins l'une des plaques de fermeture 5 présente au moins un orifice qui débouche dans une tubulure 7 ou 9 pour l'alimentation ou le refoulement en fluide réfrigérant.  The beam also has two closure plates 5 on either side of the heat exchange tubes 3, that is to say at the longitudinal ends of the beam. At least one of the closure plates 5 has at least one orifice which opens into a tubing 7 or 9 for the supply or delivery of refrigerant fluid.
Dans le cas où le fluide réfrigérant est du CO2, les plaques de fermeture 5 sont absentes.  In the case where the coolant is CO2, the closure plates 5 are absent.
Ces tubulures 7, 9 se raccordent, à leurs extrémités à un bloc 10 généralement en aluminium formant un connecteur au sens de l'invention, comme visible sur la figure 1 a. Ces éléments forment un ensemble bride/tubulures. La tubulure 7 ;9 et le connecteur 10 sont réalisés à base d'aluminium. These pipes 7, 9 are connected at their ends to a generally aluminum block 10 forming a connector in the sense of the invention, as visible in Figure 1a. These elements form a flange / tubing assembly. The tubing 7; 9 and the connector 10 are made of aluminum.
Le connecteur 10 comporte un passage 14 pour recevoir partiellement la tubulure 7 ;9, comme visible sur la figure 2a. Le procédé selon l'invention décrit à la figure 2 comporte les étapes suivantes : The connector 10 has a passage 14 to partially receive the tubing 7; 9, as shown in Figure 2a. The method according to the invention described in FIG. 2 comprises the following steps:
- fournir le connecteur 10 agencé pour être en communication fluidique avec la tubulure 7, 9,  provide the connector 10 arranged to be in fluid communication with the tubing 7, 9,
- disposer la tubulure de raccordement 7, 9 sur le connecteur 10 en vue de permettre une liaison fluidique entre eux, arranging the connecting pipe 7, 9 on the connector 10 in order to allow a fluid connection between them,
- assembler la tubulure 7, 9 avec le connecteur 10 par expansion de la tubulure dans le connecteur par hydro-magnéto formage. - Assemble the tubing 7, 9 with the connector 10 by expanding the tubing in the connector by hydro-magneto forming.
L'hydro-magnéto formage est réalisé à l'aide d'un dispositif électrique 20 pourvu d'électrodes 21 et 22 et d'une cuve de liquide 23, de l'eau dans l'exemple décrit, les électrodes étant agencés pour générer une onde de choc W provoquant l'hydro-magnéto formage. The hydro-magneto-forming is carried out using an electrical device 20 provided with electrodes 21 and 22 and a tank of liquid 23, water in the example described, the electrodes being arranged to generate a shock wave W causing the hydro-magneto forming.
Le courant électrique circulant entre les électrodes 21 et 22 est choisi compris entre 100 et 600 kAmpères. Le dispositif électrique 20 comporte un générateur d'impulsion 24 deThe electric current flowing between the electrodes 21 and 22 is chosen between 100 and 600 kAmp. The electrical device 20 comprises a pulse generator 24 of
40 à 800 microF et de 3 à 15 kV, relié aux électrodes. 40 to 800 microF and 3 to 15 kV, connected to the electrodes.
L'onde de choc est de formation ultra rapide, de temps compris de 40 à 120 m/s et le formage dure entre 10 et 100 micro secondes. The shock wave is ultra fast formation, time ranging from 40 to 120 m / s and the forming takes between 10 and 100 micro seconds.
Le dispositif électrique 20 comporte un piston 25 pour générer une onde de choc secondaire WS en étant poussé par l'onde de choc généré dans l'eau par les électrodes 21 et 22, cette onde de choc secondaire étant capable assembler la tubulure 7, 9 avec le connecteur 10. La matière de la tubulure 7,9 se déforme sous l'action de cette onde de choc secondaire WS et cette matière déformée en rencontrant le connecteur s'écrase contre ce connecteur et l'énergie ainsi dégagée permet une fusion de matière entre la tubulure et le connecteur. Ceci réalise une sorte de soudure. The electrical device 20 comprises a piston 25 for generating a secondary shock wave WS being pushed by the shock wave generated in the water by the electrodes 21 and 22, this secondary shock wave being able to assemble the tubing 7, 9 with the connector 10. The material of the tubing 7, 9 deforms under the action of this secondary shockwave WS and this deformed material by meeting the connector crushes against this connector and the energy thus released allows a melting of material between the tubing and the connector. This achieves a kind of welding.
Le dispositif 20 comporte un amplificateur d'onde formé d'un cylindre 28 dans lequel se déplace le piston 25. The device 20 comprises a wave amplifier formed of a cylinder 28 in which the piston 25 moves.
Le piston 25 comporte un nez 30 apte à pousser le liquide. The piston 25 has a nose 30 adapted to push the liquid.
Ce nez 30 présente une cavité 31 pour contenir du liquide qui participe à la création de l'onde de choc secondaire. Cette cavité sert comme surface de poussée. This nose 30 has a cavity 31 for containing liquid that participates in the creation of the secondary shock wave. This cavity serves as a thrust surface.
Deux zones d'étanchéité 33 et 34 sont prévues. Two sealing zones 33 and 34 are provided.
Les zones d'étanchéité 33 et 34 sont formées avec l'aide de deux joints annulaires 37. Les zones d'étanchéité 33 et 34 à la sortie du connecteur 10 sont en contact avec l'intérieur de la tubulure 7,9. The sealing zones 33 and 34 are formed with the aid of two annular seals 37. The sealing zones 33 and 34 at the outlet of the connector 10 are in contact with the inside of the tubing 7, 9.
La région délimitée entre ces deux zones d'étanchéité 33 et 34 est agencée pour être remplie de liquide dans lequel une onde de choc secondaire est générée. La tubulure 7, 9 présente un diamètre intérieur compris entre 7 mm et 14 mm, et une épaisseur comprise entre 1 mm et 1 .5 mm. The region delimited between these two sealing zones 33 and 34 is arranged to be filled with liquid in which a secondary shock wave is generated. The tubing 7, 9 has an internal diameter of between 7 mm and 14 mm, and a thickness of between 1 mm and 1.5 mm.

Claims

REVENDICATIONS
1 . Procédé de fabrication d'un échangeur thermique comportant un faisceau de canaux d'échange thermique dans lesquels circule un fluide de refroidissement, cet échangeur étant relié à au moins une tubulure, notamment une tubulure en aluminium, agencée pour l'alimentation ou le refoulement du fluide de refroidissement, le procédé comportant les étapes suivantes : 1. A method of manufacturing a heat exchanger comprising a bundle of heat exchange channels in which a cooling fluid circulates, this heat exchanger being connected to at least one tubing, in particular an aluminum tubing, arranged for feeding or discharging the cooling fluid, the method comprising the following steps:
- fournir un connecteur (10) agencé pour être en communication fluidique avec la tubulure, ce connecteur pouvant être un composant de l'échangeur ou être un composant déporté monté à une extrémité de la tubulure opposée à l'échangeur, - Provide a connector (10) arranged to be in fluid communication with the pipe, this connector may be a component of the heat exchanger or be a remote component mounted at one end of the pipe opposite the exchanger,
- disposer une tubulure de raccordement (7 ;9) sur le connecteur en vue de permettre une liaison fluidique entre eux,arranging a connecting pipe (7; 9) on the connector in order to allow a fluid connection between them,
- assembler la tubulure avec le connecteur par expansion de la tubulure dans le connecteur par hydro-magnéto formage, dans lequel l'hydro-magnéto formage est réalisé à l'aide d'un dispositif électrique (20) pourvu d'électrodes et d'une cuve de liquide, notamment de l'eau, les électrodes étant agencés pour générer une onde de choc provoquant l'hydro-magnéto formage, et dans lequel le dispositif électrique comporte un piston (25) pour générer une onde de choc secondaire en étant poussé par l'onde de choc généré dans l'eau par les électrodes, cette onde de choc secondaire étant capable assembler la tubulure avec le connecteur. - Assembling the tubing with the connector by expanding the tubing in the connector by hydro-magneto forming, wherein the hydro-magneto forming is performed using an electrical device (20) provided with electrodes and a tank of liquid, in particular water, the electrodes being arranged to generate a shock wave causing the hydro-magneto-forming, and wherein the electrical device comprises a piston (25) for generating a secondary shock wave while being pushed by the shock wave generated in the water by the electrodes, this secondary shock wave being able to assemble the tubing with the connector.
2. Procédé selon la revendication précédente, dans lequel le dispositif comporte un amplificateur d'onde formé de deux cylindres de diamètres différents dans lesquels se déplace le piston. 2. Method according to the preceding claim, wherein the device comprises a wave amplifier formed of two cylinders of different diameters in which the piston moves.
3. Procédé selon la revendication précédente, dans lequel le piston comporte un nez (30) apte à pousser le liquide. 4. Procédé selon la revendication précédente, dans lequel le nez3. Method according to the preceding claim, wherein the piston comprises a nose (30) adapted to push the liquid. 4. Method according to the preceding claim, wherein the nose
(30) présente une cavité pour contenir du liquide qui participe à la création de l'onde de choc secondaire. (30) has a cavity for containing liquid which participates in the creation of the secondary shock wave.
5. Procédé selon l'une des revendications précédentes, dans lequel deux zones d'étanchéité (33 ; 34) sont prévues. 5. Method according to one of the preceding claims, wherein two sealing zones (33; 34) are provided.
6. Procédé selon la revendication précédente, dans lequel la ou les zones d'étanchéité sont formées avec l'aide d'un joint annulaire. 7. Procédé selon la revendication 5 ou 6, dans lequel la zone d'étanchéité (34) à la sortie du connecteur est en contact avec l'intérieur de la tubulure. 6. Method according to the preceding claim, wherein the one or more sealing zones are formed with the aid of an annular seal. 7. The method of claim 5 or 6, wherein the sealing zone (34) at the outlet of the connector is in contact with the inside of the tubing.
8. Procédé selon l'une des revendications précédentes, dans lequel la tubulure présente un diamètre intérieur compris entre 7 mm et 14 mm, et une épaisseur comprise entre 1 mm et 1 .5 mm. 8. Method according to one of the preceding claims, wherein the tubing has an inner diameter of between 7 mm and 14 mm, and a thickness between 1 mm and 1 .5 mm.
9. Echangeur obtenu par le procédé selon l'une des revendications précédentes. 9. Exchanger obtained by the method according to one of the preceding claims.
PCT/FR2017/052897 2016-10-26 2017-10-20 Heat exchanger and method for manufacturing a heat exchanger WO2018078253A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1660379 2016-10-26
FR1660379A FR3057946B1 (en) 2016-10-26 2016-10-26 THERMAL EXCHANGER AND METHOD OF MANUFACTURING A HEAT EXCHANGER

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1422388A (en) * 1964-12-02 1965-12-24 Siemens Ag Assembly process of tubular construction elements
US4860656A (en) * 1987-09-21 1989-08-29 Imperial Chemical Industries Plc Joining metal tubes in a liquid environment
US20110239696A1 (en) 2008-12-26 2011-10-06 Showa Denko K.K. Evaporator having cold thermal energy storage function

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1422388A (en) * 1964-12-02 1965-12-24 Siemens Ag Assembly process of tubular construction elements
US4860656A (en) * 1987-09-21 1989-08-29 Imperial Chemical Industries Plc Joining metal tubes in a liquid environment
US20110239696A1 (en) 2008-12-26 2011-10-06 Showa Denko K.K. Evaporator having cold thermal energy storage function

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FR3057946B1 (en) 2019-09-13

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