EP0500429A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0500429A1
EP0500429A1 EP92400398A EP92400398A EP0500429A1 EP 0500429 A1 EP0500429 A1 EP 0500429A1 EP 92400398 A EP92400398 A EP 92400398A EP 92400398 A EP92400398 A EP 92400398A EP 0500429 A1 EP0500429 A1 EP 0500429A1
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EP
European Patent Office
Prior art keywords
propeller
motor
tubes
engine
opposite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92400398A
Other languages
German (de)
French (fr)
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EP0500429B1 (en
Inventor
Hervé Couetoux
Thierry Collette
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Thermique Moteur SA
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Valeo Thermique Moteur SA
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Publication of EP0500429A1 publication Critical patent/EP0500429A1/en
Application granted granted Critical
Publication of EP0500429B1 publication Critical patent/EP0500429B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven

Definitions

  • the invention relates to a device for exchanging heat between a fluid and atmospheric air, in particular for cooling the heat engine of a motor vehicle.
  • Such a device comprising a heat exchanger having two opposite main parallel faces and comprising a bundle of tubes, the tubes of which extend parallel to said faces, opening out to at least one fluid box, and further comprising a fan propeller. disposed opposite one of the main faces of the exchanger, in line with the bundle of tubes, and being able to rotate about an axis perpendicular to said faces, so as to produce a forced air flow through the exchanger, thus that a drive motor for the propeller, the engine and the propeller being fixed to the heat exchanger.
  • the drive motor is also disposed opposite the same main face of the exchanger, the propeller being mounted directly on the output shaft of the engine.
  • This arrangement has the advantage of simplifying the fixing of the motor-fan unit to the heat exchanger, and making any transmission member between the engine and the propeller superfluous.
  • the object of the invention is to remedy the aforementioned drawbacks.
  • the engine located outside the perimeter of the heat exchanger, does not obstruct the circulation of air in line with the tube bundle.
  • the weight of the propeller being low compared to that of the engine, the means of fixing the propeller on the exchanger may have reduced dimensions, further increasing the passage section available for air circulation.
  • the superimposition of the axial dimension of the motor on the thickness of the tube bundle reduces the size of the device in the direction of the thickness. This advantage is particularly important in current automobile construction where the space available in the engine compartment is strictly limited.
  • the drive motor is advantageously arranged beyond the fluid box with respect to the beam.
  • the propeller being mounted on a support extending opposite the same face of the heat exchanger as the propeller and itself fixed on the exchanger in the region of the fluid box and in the region opposite to this, the drive motor is mounted on a portion of the support extending in overhang beyond the fluid box.
  • the arrangement according to the invention makes the motor insensitive to this air flow and in particular to the heating thereof. by contact with the tubes.
  • the device illustrated in FIGS. 1 to 3 intended for cooling the coolant of the heat engine of a motor vehicle, comprises a heat exchanger or cooling radiator 1, comprising a bundle of tubes 2 formed of a multiplicity of elongated tubes 3 all parallel each passing through a stack of dissipation fins 4 in the form of thin rectangular plates.
  • the tubes 3 and the fins 4 form a parallelepiped block having two opposite main faces 5 and 6, parallel to the axes of the tubes.
  • the radiator 1 also comprises a fluid box 7 disposed at one end of the tube bundle and provided with a connector 8, or two connectors, for the entry of the coolant into the radiator and / or for the outlet from this radiator fluid.
  • the interior of the fluid box communicates with all of the tubes 3 so as to allow the circulation of the cooling fluid along each of them, from or to the fluid box.
  • the tubes can be connected to another fluid box, or be connected in pairs in a U shape.
  • the fluid box 7 has a boss 9 on which is fixed one end of a sheet metal support 10 having the general shape of a strip extending in the longitudinal direction of the tubes 3 between the boss 9 and a second fixing point not shown located at the end of the exchanger opposite the fluid box 7, this second attachment point may belong to another fluid box, or to a cross member.
  • the direction of the width of the support 10 is parallel to the faces 5 and 6 of the tube bundle and perpendicular to the axes of the tubes. This width represents only a small fraction of that of the bundle of tubes.
  • the support 10 In its middle part, the support 10 carries a fixed shaft 11, oriented perpendicular to the faces 5 and 6.
  • a fan propeller 13 On the shaft 11 can rotate the hub 12 of a fan propeller 13, which propeller comprises a multiplicity of blades 14 s' extending radially between the hub 12 and a peripheral ring 15 forming a single piece with these and with a cylindrical intermediate ring 16 having a groove 17 forming a pulley.
  • a transmission belt 18 engages in this groove and in the groove of another pulley 19 secured to the output shaft 20, parallel to the shaft 11, of an electric motor 21.
  • This motor is located at- beyond the body of the fluid box 7 relative to the tube bundle 2, therefore outside the perimeter of the radiator 1, as seen in the direction of the axis of the shafts 11 and 20, hereinafter called the axial direction.
  • a mounting flange 22 secured to the motor housing and extending along a plane perpendicular to the axial direction is applied by fixing screws not shown on a mounting surface formed by a face 23 of a flange 24 molded with the fluid box.
  • Two reinforcing ribs 25, also molded with the fluid box and extending parallel to the axial direction and to the length of the tubes, are connected to the flange 24.
  • the motor 21 passes through an opening in the flange 24 and extends in the axial direction in both directions beyond the thickness of the radiator 1.
  • the size of the device in the axial direction corresponds substantially to that of the motors alone, without that is added, even in part, the thickness of the radiator.
  • the size of the device in the axial direction would correspond at least to that of the engine plus the thickness of the bundle of tubes (that is to say the width of the fins 4) and of the part of the fluid box 7 projecting beyond the face 6 of the tube bundle.
  • the diameter of the pulley 17 is greater than that of the pulley 19, so that the propeller 13 rotates less quickly than the motor 21.
  • Figures 4 and 5 illustrate a variant of the device and the same references as in Figures 1 and 2 are used to designate similar elements.
  • the flange 24 and the ribs 25 are removed, the support 10 'carrying the propeller not shown is fixed on two bosses 9' of the fluid box 7 'and extends 10 "beyond these to support the the engine is cantilevered, which results in a simplification of the assembly of the motor-fan assembly and an improvement in its rigidity.
  • the radiator 101 illustrated schematically in Figures 6 and 7 comprises a bundle of tubes 102 similar to the bundle 2 of Figures 1 to 5 at the opposite ends of which are arranged two fluid boxes 107 and 107a respectively.
  • a support made of ribbed sheet metal 110 extends from one end to the other of the bundle 102, opposite one of the main faces 105 of the latter, and is fixed by means not shown on the fluid boxes 107 and 107a.
  • This support carries a bearing 130 in which a shaft 131, oriented perpendicular to the face 105, can rotate while being immobilized in translation.
  • the shaft 131 is fitted into the hub 112 of a fan propeller 113.
  • the hub 112 is connected by a radial flange 132 to an intermediate ring 116, a multiplicity of blades 114 extending between the latter and a peripheral ring 115 .
  • the support 110 at its connection with the fluid box 107, also carries an electric motor 121 whose axis of rotation is parallel to the longitudinal direction of the tubes of the bundle 102, and therefore perpendicular to the direction of the shaft 131.
  • the output shaft 120 of the engine extends towards the central region of the radiator 101 to the vicinity of the shaft 131, and its free end is guided in a bearing 133 secured to the bearing 130.
  • a bevel gear 134 integral with the shaft 120 meshes with another bevel gear 135 formed on the edge of the intermediate cylindrical ring 116 of the propeller 113 facing the shaft 120 and opposite the bundle of tubes 102, this ring 116 being connected to the flange 132 on the side facing the beam 102.
  • the ratio of the diameters of the pinions 134 and 135, like that of the pulleys 19 and 17 of the device of FIGS. 1 to 3, is provided to ensure a rotational speed of the propeller lower than that of the motor.
  • the motor 121 extends partly opposite the fluid box 107, and partly opposite the bundle of tubes 102. Unlike the motor 21 of FIGS. 1 to 5, it partly masks the bundle of tubes, but in a lesser measure than coaxial propeller motors of the prior art. The overall dimensions of the assembly in the direction of the axis of the propeller is also reduced due to the orientation of the motor perpendicular to this axis. This arrangement has the advantage over that of FIGS. 1 to 5 of a space requirement on the surface of the device limited to that of the radiator itself.
  • a second motor 121a mounted on the support 110 opposite the fluid box 107a and in part of the bundle of tubes 102, and arranged symmetrically with the motor 121 relative to the axis of the propeller 113.
  • the output shaft 120a of motor 121a is coaxial with output shaft 120 of motor 121, and also extends to the vicinity of shaft 131 of the propeller, its free end being guided in a bearing 133a secured to the bearings 130 and 133.
  • a bevel gear 134a secured to the shaft 120a also meshes with the bevel gear 135.
  • the propeller 113 can be driven either by one or the other of the motors 121 and 121a, or by both at the same time. This arrangement makes it possible to rotate the propeller at various speeds of choice, by supplying only one of the motors, and / or by supplying them both in series or in parallel. Furthermore, each of the motors requiring less power than the single motor of the device in FIGS. 6 and 7 may have a smaller diameter, which reduces the size of the device in the direction of the axis of the propeller.
  • the motor or motors of FIGS. 6 to 9 can be mounted as desired on the fluid box or boxes, independently of the propeller support, or else on the latter, as described.
  • the engine or each engine of the devices described can be controlled so as to rotate intermittently and / or at variable speed as a function of the temperature of the coolant, by means of control members including a temperature sensor. arranged in the corresponding fluid box.
  • control members including a temperature sensor. arranged in the corresponding fluid box.
  • the arrangement according to the invention makes it possible to group these control members in the vicinity of the engine, for example in a control box mounted on the fluid box, and to connect them to the engine by one or more short conductors.

Abstract

Le moteur (21) du groupe moto-ventilateur est disposé en dehors du périmètre du radiateur (1), comme vu dans la direction de l'axe (11) de l'hélice, et sa dimension dans ladite direction se superpose, au moins en partie, à l'épaisseur du faisceau de tubes du radiateur (2). Il entraîne l'hélice (13), disposée en regard du faisceau de tubes, par l'intermédiaire d'une courroie (18). L'encombrement de l'ensemble dans la direction axiale est réduit, et le moteur ne gêne pas la circulation de l'air à travers le radiateur. <IMAGE>The motor (21) of the motor-fan unit is arranged outside the perimeter of the radiator (1), as seen in the direction of the axis (11) of the propeller, and its dimension in said direction overlaps, at least in part, to the thickness of the radiator tube bundle (2). It drives the propeller (13), placed opposite the bundle of tubes, by means of a belt (18). The overall dimensions of the assembly in the axial direction are reduced, and the engine does not obstruct the circulation of air through the radiator. <IMAGE>

Description

L'invention concerne un dispositif pour l'échange de chaleur entre un fluide et l'air atmosphérique, notamment pour le refroidissement du moteur thermique d'un véhicule automobile.The invention relates to a device for exchanging heat between a fluid and atmospheric air, in particular for cooling the heat engine of a motor vehicle.

On connaît un tel dispositif comprenant un échangeur de chaleur présentant deux faces principales opposées parallèles et comportant un faisceau de tubes dont les tubes s'étendent parallèlement auxdites faces, en débouchant à au moins une boîte à fluide, et comprenant en outre une hélice de ventilateur disposée en regard de l'une des faces principales de l'échangeur, au droit du faisceau de tubes, et pouvant tourner autour d'un axe perpendiculaire auxdites faces, de façon à produire un courant d'airforcé à travers l'échangeur, ainsi qu'un moteur d'entraînement pour l'hélice, le moteur et l'hélice étant fixés à l'échangeur de chaleur.Such a device is known comprising a heat exchanger having two opposite main parallel faces and comprising a bundle of tubes, the tubes of which extend parallel to said faces, opening out to at least one fluid box, and further comprising a fan propeller. disposed opposite one of the main faces of the exchanger, in line with the bundle of tubes, and being able to rotate about an axis perpendicular to said faces, so as to produce a forced air flow through the exchanger, thus that a drive motor for the propeller, the engine and the propeller being fixed to the heat exchanger.

Dans ce dispositif connu, le moteur d'entraînement est également disposé en regard de la même face principale de l'échangeur, l'hélice étant montée directement sur l'arbre de sortie du moteur. Cette disposition présente l'avantage de simplifier la fixation du groupe moto-ventilateur sur l'échangeur de chaleur, et de rendre superflu tout organe de transmission entre le moteur et l'hélice.In this known device, the drive motor is also disposed opposite the same main face of the exchanger, the propeller being mounted directly on the output shaft of the engine. This arrangement has the advantage of simplifying the fixing of the motor-fan unit to the heat exchanger, and making any transmission member between the engine and the propeller superfluous.

Ces avantages ont pour contrepartie les inconvénients suivants. L'encombrement du moteur dans la direction axiale, relativement important, s'ajoute à l'épaisseur du faisceau de tubes. Le moteur lui-même et ses moyens de fixation à l'échangeur de chaleur couvrent une fraction non négligeable de la surface de l'échangeur de chaleur, réduisant ainsi la section disponible pour la circulation de l'air entraîné par l'hélice. Le moteur et l'hélice tournent à la même vitesse, alors que la vitesse de rotation idéale est différente pour ces deux éléments. Enfin, dans le cas où le groupe moto-ventilateur est disposé en aval du faisceau de tubes d'un radiateur de refroidissement, par rapport au courant d'air qu'il produit, le moteur est balayé par de l'air déjà réchauffé par son contact avec les tubes, ce qui peut nuire à son propre refroidissement.These advantages have the following drawbacks. The relatively large size of the motor in the axial direction adds to the thickness of the tube bundle. The engine itself and its means of attachment to the heat exchanger cover a non-negligible fraction of the surface of the heat exchanger, thereby reducing the section available for the circulation of air driven by the propeller. The engine and propeller rotate at the same speed, while the ideal rotation speed is different for these two elements. Finally, in the case where the motor-fan unit is arranged downstream of the bundle of tubes of a cooling radiator, with respect to the air flow it produces, the engine is swept by air already heated by contact with the tubes, which can affect its own cooling.

Le but de l'invention est de remédier aux inconvénients précités.The object of the invention is to remedy the aforementioned drawbacks.

Ce but est atteint, selon l'invention, par un dispositif tel que défini en introduction, dans lequel le moteur est disposé en dehors du périmètre de l'échangeur de chaleur, et sa dimension dans la direction de l'axe de l'hélice se superpose, au moins en partie, à l'épaisseur de l'échangeur de chaleur.This object is achieved, according to the invention, by a device as defined in the introduction, in which the engine is arranged outside the perimeter of the heat exchanger, and its dimension in the direction of the axis of the propeller. overlaps, at least in part, with the thickness of the heat exchanger.

Le moteur, disposé en dehors du périmètre de l'échangeur de chaleur, ne gêne pas la circulation de l'air au droit du faisceau de tube. De plus, le poids de l'hélice étant faible par rapport à celui du moteur, les moyens de fixation de l'hélice sur l'échangeur peuvent avoir des dimensions réduites, augmentant encore la section de passage disponible pour la circulation de l'air. Par ailleurs, la superposition de la dimension axiale du moteur à l'épaisseur du faisceau de tube diminue l'encombrement du dispositif dans la direction de l'épaisseur. Cet avantage est particulièrement important dans la construction automobile actuelle où l'espace disponible dans le compartiment moteur est strictement limité.The engine, located outside the perimeter of the heat exchanger, does not obstruct the circulation of air in line with the tube bundle. In addition, the weight of the propeller being low compared to that of the engine, the means of fixing the propeller on the exchanger may have reduced dimensions, further increasing the passage section available for air circulation. . Furthermore, the superimposition of the axial dimension of the motor on the thickness of the tube bundle reduces the size of the device in the direction of the thickness. This advantage is particularly important in current automobile construction where the space available in the engine compartment is strictly limited.

Le moteur d'entraînement est avantageusement disposé au-delà de la boîte à fluide par rapport au faisceau.The drive motor is advantageously arranged beyond the fluid box with respect to the beam.

Il peut alors être fixé sur une face de montage prévue sur la boîte à fluide.It can then be fixed on a mounting face provided on the fluid box.

Alternativement, l'hélice étant montée sur un support s'étendant en regard de la même face de l'échangeur de chaleur que l'hélice et lui-même fixé sur l'échangeur dans la région de la boîte à fluide et dans la région opposée à celle-ci, le moteur d'entraînement est monté sur une portion du support s'étendant en porte-à-faux au-delà de la boîte à fluide.Alternatively, the propeller being mounted on a support extending opposite the same face of the heat exchanger as the propeller and itself fixed on the exchanger in the region of the fluid box and in the region opposite to this, the drive motor is mounted on a portion of the support extending in overhang beyond the fluid box.

La dissociation des axes du moteur et de l'hélice permet de les relier par des organes de transmission communiquant à cette dernière une vitesse de rotation inférieure à celle du moteur. Il est en effet avantageux, pour le rendement du moteur, que celui-ci tourne à une vitesse relativement élevée, alors que la rotation de l'hélice à cette même vitesse produirait un bruit désagréable.The dissociation of the axes of the engine and the propeller makes it possible to connect them by transmission members communicating to the latter a lower speed of rotation than that of the engine. It is indeed advantageous, for the efficiency of the engine, that the latter rotates at a relatively high speed, while the rotation of the propeller at this same speed would produce an unpleasant noise.

Enfin, lorsque l'hélice est disposé en aval du faisceau de tube par rapport au courant d'air qu'elle produit, la disposition selon l'invention rend le moteur insensible à ce courant d'air et notamment au réchauffement de celui-ci par le contact avec les tubes.Finally, when the propeller is arranged downstream of the tube bundle with respect to the air flow which it produces, the arrangement according to the invention makes the motor insensitive to this air flow and in particular to the heating thereof. by contact with the tubes.

D'autres caractéristiques et avantages de l'invention ressortiront de la description détaillée ci-après, et des dessins annexés dans lesquels :

  • - la figure 1 est une vue partielle en élévation d'un dispositif selon l'invention ;
  • - la figure 2 est une vue partielle de ce même dispositif, selon la flèche F2 de la figure 1, avec arrachement partiel ;
  • - la figure 3 est une vue partielle selon la flèche F3 de la figure 1, partiellement en coupe ;
  • - la figure 4 est une vue partielle correspondant à la figure 1, relative à une variante ;
  • - la figure 5 est une vue partielle correspondant à la figure 3, relative à cette même variante ;
  • - les figures 6 et 7 sont des vues schématiques, partiellement en coupe, respectivement de côté et de face d'un autre dispositif selon l'invention ; et
  • - les figures 8 et 9 sont des vues analogues aux figures 6 et 7 respectivement, relatives à une variante.
Other characteristics and advantages of the invention will emerge from the detailed description below, and from the appended drawings in which:
  • - Figure 1 is a partial elevational view of a device according to the invention;
  • - Figure 2 is a partial view of the same device, according to arrow F2 of Figure 1, with partial cutaway;
  • - Figure 3 is a partial view along arrow F3 of Figure 1, partially in section;
  • - Figure 4 is a partial view corresponding to Figure 1, relating to a variant;
  • - Figure 5 is a partial view corresponding to Figure 3, relating to this same variant;
  • - Figures 6 and 7 are schematic views, partially in section, respectively from the side and from the front of another device according to the invention; and
  • - Figures 8 and 9 are views similar to Figures 6 and 7 respectively, relating to a variant.

Le dispositif illustré aux figures 1 à 3, destiné au refroidissement du fluide de refroidissement du moteur thermique d'un véhicule automobile, comprend un échangeur de chaleur ou radiateur de refroidissement 1, comportant un faisceau de tubes 2 formé d'une multiplicité de tubes allongés 3 tous parallèles traversant chacun un empilement d'ailettes de dissipation 4 sous forme de plaques minces rectangulaires. Les tubes 3 et les ailettes 4 forment un bloc parallélépipédique présentant deux faces principales opposées 5 et 6, parallèles aux axes des tubes.The device illustrated in FIGS. 1 to 3, intended for cooling the coolant of the heat engine of a motor vehicle, comprises a heat exchanger or cooling radiator 1, comprising a bundle of tubes 2 formed of a multiplicity of elongated tubes 3 all parallel each passing through a stack of dissipation fins 4 in the form of thin rectangular plates. The tubes 3 and the fins 4 form a parallelepiped block having two opposite main faces 5 and 6, parallel to the axes of the tubes.

Le radiateur 1 comporte également une boîte à fluide 7 disposée à une extrémité du faisceau de tube et munie d'un raccord 8, ou de deux raccords, pour l'entrée du fluide de refroidissement dans le radiateur et/ou pour la sortie de ce fluide du radiateur. L'intérieur de la boîte à fluide communique avec l'ensemble des tubes 3 de façon à permettre la circulation du fluide de refroidissement le long de chacun d'eux, à partir de la boîte à fluide ou vers celle-ci. A l'extrémité du faisceau, non représentée, opposée à la boîte à fluide 7, les tubes peuvent être reliés à une autre boîte à fluide, ou être raccordée deux à deux en U.The radiator 1 also comprises a fluid box 7 disposed at one end of the tube bundle and provided with a connector 8, or two connectors, for the entry of the coolant into the radiator and / or for the outlet from this radiator fluid. The interior of the fluid box communicates with all of the tubes 3 so as to allow the circulation of the cooling fluid along each of them, from or to the fluid box. At the end of the bundle, not shown, opposite the fluid box 7, the tubes can be connected to another fluid box, or be connected in pairs in a U shape.

La boîte à fluide 7 présente un bossage 9 sur lequel est fixée une extrémité d'un support en tôle 10 ayant la forme générale d'une bande s'étendant dans la direction longitudinale des tubes 3 entre le bossage 9 et un second point de fixation non représenté situé à l'extrémité de l'échangeur opposé à la boîte à fluide 7, ce second point de fixation pouvant appartenir à une autre boîte à fluide, ou à une traverse. La direction de la largeur du support 10 est parallèle aux faces 5 et 6 du faisceau de tubes et perpendiculaire aux axes des tubes. Cette largeur ne représente qu'une faible fraction de celle du faisceau de tubes. Dans sa partie médiane, le support 10 porte un arbre fixe 11, orienté perpendiculairement aux faces 5 et 6. Sur l'arbre 11 peut tourner le moyeu 12 d'une hélice de ventilateur 13, laquelle hélice comporte une multiplicité de pales 14 s'étendant radialement entre le moyeu 12 et une couronne périphérique 15 en formant une seule pièce avec ceux-ci et avec une couronne intermédiaire cylindrique 16 présentant une gorge 17 formant poulie.The fluid box 7 has a boss 9 on which is fixed one end of a sheet metal support 10 having the general shape of a strip extending in the longitudinal direction of the tubes 3 between the boss 9 and a second fixing point not shown located at the end of the exchanger opposite the fluid box 7, this second attachment point may belong to another fluid box, or to a cross member. The direction of the width of the support 10 is parallel to the faces 5 and 6 of the tube bundle and perpendicular to the axes of the tubes. This width represents only a small fraction of that of the bundle of tubes. In its middle part, the support 10 carries a fixed shaft 11, oriented perpendicular to the faces 5 and 6. On the shaft 11 can rotate the hub 12 of a fan propeller 13, which propeller comprises a multiplicity of blades 14 s' extending radially between the hub 12 and a peripheral ring 15 forming a single piece with these and with a cylindrical intermediate ring 16 having a groove 17 forming a pulley.

Une courroie de transmission 18 s'engage dans cette gorge et dans la gorge d'une autre poulie 19 solidaire de l'arbre de sortie 20, parallèle à l'arbre 11, d'un moteur électrique 21. Ce moteur est situé au-delà du corps de la boîte à fluide 7 par rapport au faisceau de tube 2, donc en dehors du périmètre du radiateur 1, comme vu dans la direction de l'axe des arbres 11 et 20, appelée ci-après direction axiale. Une bride de montage 22 solidaire du boîtier du moteur et s'étendant selon un plan perpendiculaire à la direction axiale est appliquée par des vis de fixation non représentées sur une surface de montage constituée par une face 23 d'un flasque 24 venu de moulage avec la boîte à fluide. Deux nervures de renforcement 25, également venues de moulage avec la boîte à fluide et s'étendant parallèlement à la direction axiale et à la longueur des tubes, se raccordent au flasque 24.A transmission belt 18 engages in this groove and in the groove of another pulley 19 secured to the output shaft 20, parallel to the shaft 11, of an electric motor 21. This motor is located at- beyond the body of the fluid box 7 relative to the tube bundle 2, therefore outside the perimeter of the radiator 1, as seen in the direction of the axis of the shafts 11 and 20, hereinafter called the axial direction. A mounting flange 22 secured to the motor housing and extending along a plane perpendicular to the axial direction is applied by fixing screws not shown on a mounting surface formed by a face 23 of a flange 24 molded with the fluid box. Two reinforcing ribs 25, also molded with the fluid box and extending parallel to the axial direction and to the length of the tubes, are connected to the flange 24.

Le moteur 21 traverse une ouverture du flasque 24 et s'étend dans la direction axiale dans les deux sens au-delà de l'épaisseur du radiateur 1. Ainsi l'encombrement du dispositif dans la direction axiale correspond sensiblement à celle du moteurseul, sans que s'y ajoute, même en partie, l'épaisseur du radiateur. Au contraire, si le moteur était disposé, avec l'hélice 13, en regard de la face 5 du faisceau de tubes, l'encombrement du dispositif dans la direction axiale correspondrait au moins à celle du moteur additionnée de l'épaisseur du faisceau de tubes (c'est-à-dire la largeur des ailettes 4) et de la partie de la boîte à fluide 7 faisant saillie au-delà de la face 6 du faisceau de tubes.The motor 21 passes through an opening in the flange 24 and extends in the axial direction in both directions beyond the thickness of the radiator 1. Thus the size of the device in the axial direction corresponds substantially to that of the motors alone, without that is added, even in part, the thickness of the radiator. On the contrary, if the engine were arranged, with the propeller 13, facing the face 5 of the bundle of tubes, the size of the device in the axial direction would correspond at least to that of the engine plus the thickness of the bundle of tubes (that is to say the width of the fins 4) and of the part of the fluid box 7 projecting beyond the face 6 of the tube bundle.

Le diamètre de la poulie 17 est supérieur à celui de la poulie 19, de sorte que l'hélice 13 tourne moins vite que le moteur 21.The diameter of the pulley 17 is greater than that of the pulley 19, so that the propeller 13 rotates less quickly than the motor 21.

Les figures 4 et 5 illustrent une variante du dispositif et les mêmes références qu'aux figures 1 et 2 y sont utilisées pour désigner des éléments semblables. Le flasque 24 et les nervures 25 sont supprimés, le support 10' portant l'hélice non représentée est fixé sur deux bossages 9' de la boîte à fluide 7' et se prolonge en 10" au-delà de ceux-ci pour supporter le moteur en porte-à-faux. Il en résulte une simplification du montage du groupe moto-ventilateur et une amélioration de sa rigidité.Figures 4 and 5 illustrate a variant of the device and the same references as in Figures 1 and 2 are used to designate similar elements. The flange 24 and the ribs 25 are removed, the support 10 'carrying the propeller not shown is fixed on two bosses 9' of the fluid box 7 'and extends 10 "beyond these to support the the engine is cantilevered, which results in a simplification of the assembly of the motor-fan assembly and an improvement in its rigidity.

Le radiateur 101 illustré schématiquement aux figures 6 et 7 comprend un faisceau de tubes 102 semblable au faisceau 2 des figures 1 à 5 aux extrémités opposées duquel sont disposées deux boîtes à fluide 107 et 107a respectivement. Un support en tôle nervurée 110, non représenté sur la figure 7 pour plus de clarté, s'étend d'une extrémité à l'autre du faisceau 102, en regard de l'une des faces principales 105 de celui-ci, et est fixé par des moyens non représentés sur les boîtes à fluide 107 et 107a. Ce support porte un palier 130 dans lequel un arbre 131, orienté perpendiculairement à la face 105, peut tourner en étant immobilisé en translation. L'arbre 131 est emmanché dans le moyeu 112 d'une hélice de ventilateur 113. Le moyeu 112 est relié par un flasque radial 132 à une couronne intermédiaire 116, une multiplicité de pales 114 s'étendant entre cette dernière et une couronne périphérique 115.The radiator 101 illustrated schematically in Figures 6 and 7 comprises a bundle of tubes 102 similar to the bundle 2 of Figures 1 to 5 at the opposite ends of which are arranged two fluid boxes 107 and 107a respectively. A support made of ribbed sheet metal 110, not shown in FIG. 7 for clarity, extends from one end to the other of the bundle 102, opposite one of the main faces 105 of the latter, and is fixed by means not shown on the fluid boxes 107 and 107a. This support carries a bearing 130 in which a shaft 131, oriented perpendicular to the face 105, can rotate while being immobilized in translation. The shaft 131 is fitted into the hub 112 of a fan propeller 113. The hub 112 is connected by a radial flange 132 to an intermediate ring 116, a multiplicity of blades 114 extending between the latter and a peripheral ring 115 .

Le support 110, au niveau de sa liaison avec la boîte à fluide 107, porte également un moteur électrique 121 dont l'axe de rotation est parallèle à la direction longitudinale des tubes du faisceau 102, et par conséquent perpendiculaire à la direction de l'arbre 131. L'arbre de sortie 120 du moteur s'étend vers la région centrale du radiateur 101 jusqu'au voisinage de l'arbre 131, et son extrémité libre est guidée dans un palier 133 solidaire du palier 130. Un pignon conique 134 solidaire de l'arbre 120 engrène avec un autre pignon conique 135 formé sur la tranche de la couronne cylindrique intermédiaire 116 de l'hélice 113 tournée vers l'arbre 120 et à l'opposé du faisceau de tubes 102, cette couronne 116 se raccordant au flasque 132 du côté tourné vers le faisceau 102. Le rapport des diamètres des pignons 134 et 135, comme celui des poulies 19 et 17 du dispositif des figures 1 à 3, est prévu pour assurer une vitesse de rotation de l'hélice inférieure à celle du moteur.The support 110, at its connection with the fluid box 107, also carries an electric motor 121 whose axis of rotation is parallel to the longitudinal direction of the tubes of the bundle 102, and therefore perpendicular to the direction of the shaft 131. The output shaft 120 of the engine extends towards the central region of the radiator 101 to the vicinity of the shaft 131, and its free end is guided in a bearing 133 secured to the bearing 130. A bevel gear 134 integral with the shaft 120 meshes with another bevel gear 135 formed on the edge of the intermediate cylindrical ring 116 of the propeller 113 facing the shaft 120 and opposite the bundle of tubes 102, this ring 116 being connected to the flange 132 on the side facing the beam 102. The ratio of the diameters of the pinions 134 and 135, like that of the pulleys 19 and 17 of the device of FIGS. 1 to 3, is provided to ensure a rotational speed of the propeller lower than that of the motor.

Le moteur 121 s'étend pour partie en regard de la boîte à fluide 107, et pour partie en regard du faisceau de tubes 102. Contrairement au moteur 21 des figures 1 à 5, il masque en partie le faisceau de tubes, mais dans une moindre mesure que les moteurs coaxiaux aux hélices de l'état de la technique. L'encombrement de l'ensemble dans la direction de l'axe de l'hélice est également réduit en raison de l'orientation du moteur perpendiculairement à cet axe. Cette disposition présente par rapport à celle des figures 1 à 5 l'avantage d'un encombrement en surface du dispositif limité à celui du radiateur lui-même.The motor 121 extends partly opposite the fluid box 107, and partly opposite the bundle of tubes 102. Unlike the motor 21 of FIGS. 1 to 5, it partly masks the bundle of tubes, but in a lesser measure than coaxial propeller motors of the prior art. The overall dimensions of the assembly in the direction of the axis of the propeller is also reduced due to the orientation of the motor perpendicular to this axis. This arrangement has the advantage over that of FIGS. 1 to 5 of a space requirement on the surface of the device limited to that of the radiator itself.

On retrouve dans le dispositif des figures 8 et 9 tous les éléments décrits à propos des figures 6 et 7, qui par conséquent ne seront pas décrits de nouveau. S'y ajoute un second moteur 121a monté sur le support 110 en regard de la boîte à fluide 107a et en partie du faisceau de tubes 102, et disposé symétriquement du moteur 121 par rapport à l'axe de l'hélice 113. L'arbre de sortie 120a du moteur 121a est coaxial à l'arbre de sortie 120 du moteur 121, et s'étend également jusqu'au voisinage de l'arbre 131 de l'hélice, son extrémité libre étant guidée dans un palier 133a solidaire des paliers 130 et 133. Un pignon conique 134a solidaire de l'arbre 120a engrène également avec le pignon conique 135.We find in the device of Figures 8 and 9 all the elements described in connection with Figures 6 and 7, which therefore will not be described again. Added to this is a second motor 121a mounted on the support 110 opposite the fluid box 107a and in part of the bundle of tubes 102, and arranged symmetrically with the motor 121 relative to the axis of the propeller 113. The output shaft 120a of motor 121a is coaxial with output shaft 120 of motor 121, and also extends to the vicinity of shaft 131 of the propeller, its free end being guided in a bearing 133a secured to the bearings 130 and 133. A bevel gear 134a secured to the shaft 120a also meshes with the bevel gear 135.

L'hélice 113 peut être entraînée indifféremment par l'un ou l'autre des moteurs 121 et 121a, ou par les deux à la fois. Cette disposition permet de faire tourner l'hélice à différentes vitesses au choix, en alimentant un seul des moteurs, et/ou en les alimentant tous deux en série ou en parallèle. Parailleurs, chacun des moteurs nécessitant une puissance moindre que le moteur unique du dispositif des figures 6 et 7 peut avoir un diamètre plus petit, ce qui diminue l'encombrement du dispositif dans la direction de l'axe de l'hélice.The propeller 113 can be driven either by one or the other of the motors 121 and 121a, or by both at the same time. This arrangement makes it possible to rotate the propeller at various speeds of choice, by supplying only one of the motors, and / or by supplying them both in series or in parallel. Furthermore, each of the motors requiring less power than the single motor of the device in FIGS. 6 and 7 may have a smaller diameter, which reduces the size of the device in the direction of the axis of the propeller.

Comme le moteur des figures 1 à 5, le ou les moteurs des figures 6 à 9 peuvent être montés au choix sur la ou les boîtes à fluide, indépendamment du support de l'hélice, ou bien sur ce dernier, comme décrit.Like the motor of FIGS. 1 to 5, the motor or motors of FIGS. 6 to 9 can be mounted as desired on the fluid box or boxes, independently of the propeller support, or else on the latter, as described.

Comme connu en soi, le moteur ou chaque moteur des dispositifs décrits peut être commandé de façon à tourner par intermittence et/ou à vitesse variable en fonction de la température du fluide de refroidissement, au moyen d'organes de commandes incluant un capteur de température disposé dans la boîte à fluide correspondante. La disposition selon l'invention permet de grouper ces organes de commande au voisinage du moteur, par exemple dans un boîtier de commande monté sur la boîte à fluide, et de les relier au moteur par un ou des conducteurs de faible longueur.As known per se, the engine or each engine of the devices described can be controlled so as to rotate intermittently and / or at variable speed as a function of the temperature of the coolant, by means of control members including a temperature sensor. arranged in the corresponding fluid box. The arrangement according to the invention makes it possible to group these control members in the vicinity of the engine, for example in a control box mounted on the fluid box, and to connect them to the engine by one or more short conductors.

Claims (10)

1. - Dispositif pour l'échange de chaleur entre un fluide et l'air atmosphérique, notamment pour le refroidissement du moteur thermique d'un véhicule automobile, comprenant un échangeur de chaleur (1) présentant deux faces principales opposées parallèles (5,6) et comportant un faisceau (2) de tubes dont les tubes (3) s'étendent parallèlement auxdites faces, en débouchant à au moins une boîte à fluide (7), et comprenant en outre une hélice de ventilateur (13) disposée en regard de l'une (5) des faces principales de l'échangeur, au droit du faisceau de tubes, et pouvant tourner autour d'un axe perpendiculaire auxdites faces, de façon à produire un courant d'air forcé à travers l'échangeur, ainsi qu'un moteur d'entraînement (21) pour l'hélice, le moteur et l'hélice étant fixés à l'échangeur de chaleur, le moteur (21,121,121 a) étant disposé au moins en partie en dehors du périmètre du faisceau de tubes, comme vu dans la direction de l'axe de l'hélice (13, 113), et est relié à cette dernière par des moyens de transmission (17,18,19 ; 134,135), caractérisé en ce que le moteur (21) est disposé en dehors du périmètre de l'échangeur de chaleur, et en ce que sa dimension dans la direction de l'axe de l'hélice se superpose, au moins en partie, à l'épaisseur de l'échangeur de chaleur.1. - Device for exchanging heat between a fluid and atmospheric air, in particular for cooling the heat engine of a motor vehicle, comprising a heat exchanger (1) having two opposite main principal faces (5,6 ) and comprising a bundle (2) of tubes, the tubes (3) of which extend parallel to said faces, opening out to at least one fluid box (7), and further comprising a fan propeller (13) arranged opposite one (5) of the main faces of the exchanger, in line with the bundle of tubes, and which can rotate about an axis perpendicular to said faces, so as to produce a forced air flow through the exchanger, as well as a drive motor (21) for the propeller, the engine and the propeller being fixed to the heat exchanger, the engine (21,121,121 a) being arranged at least partly outside the perimeter of the beam of tubes, as seen in the direction of the axis of the propeller (13, 113), and is connected to the latter by transmission means (17,18,19; 134,135), characterized in that the motor (21) is arranged outside the perimeter of the heat exchanger, and in that its dimension in the direction of the axis of the propeller overlaps, at least in part, to the thickness of the heat exchanger. 2. - Dispositif selon la revendication 1, caractérisé en ce que le moteur (21) est disposé au-delà de la boîte à fluide par rapport au faisceau (2).2. - Device according to claim 1, characterized in that the motor (21) is arranged beyond the fluid box with respect to the beam (2). 3. - Dispositif selon la revendication 1, caractérisé en ce que le moteur (121,121 a) est disposé au moins en partie en regard de la boîte à fluide (7), son arbre de sortie étant orienté perpendiculairement à l'axe de l'hélice (113).3. - Device according to claim 1, characterized in that the motor (121,121 a) is arranged at least partially opposite the fluid box (7), its output shaft being oriented perpendicular to the axis of the propeller (113). 4. - Dispositif selon 1 a revendication 1. caractérisé en ce que l'échangeur de chaleur comprend deux boîtes de fluide situées respectivement aux extrémités opposées du faisceau de tubes, et en ce que deux moteurs sont disposés au moins en partie en regard des deux boîtes à fluide respectivement, leurs arbres de sortie étant orientés perpendiculairement à l'axe de l'hélice.4. - Device according to 1 a claim 1. characterized in that the heat exchanger comprises two fluid boxes located respectively at the opposite ends of the tube bundle, and in that two motors are arranged at least partially opposite the two fluid boxes respectively, their output shafts being oriented perpendicular to the axis of the propeller. 5. - Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que le moteur est fixé sur une face de montage (23) prévue sur la boîte à fluide.5. - Device according to one of claims 1 to 4, characterized in that the motor is fixed to a mounting face (23) provided on the fluid box. 6. - Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que l'hélice et le ou les moteurs sont montés sur un support (10) s'étendant en regard de la même face (5) de l'échangeur de chaleur que l'hélice et lui-même fixé sur l'échangeur dans la région de la boîte à fluide et dans la région opposée à celle-ci, ou dans les régions des deux boîtes à fluide.6. - Device according to one of claims 1 to 5, characterized in that the propeller and the motor or motors are mounted on a support (10) extending opposite the same face (5) of the exchanger heat that the propeller and itself fixed on the exchanger in the region of the fluid box and in the region opposite to it, or in the regions of the two fluid boxes. 7. - Dispositif selon la revendication 6, caractérisé en ce que le moteur d'entraînement (21) est monté sur une portion du support (10") s'étendant en porte-à-faux au-delà de la boîte à fluide.7. - Device according to claim 6, characterized in that the drive motor (21) is mounted on a portion of the support (10 ") extending in overhang beyond the fluid box. 8. - Dispositif selon l'une des revendications précédentes, caractérisé en ce que les moyens de transmission (19,18,17 ; 134,134a,135) communiquent à l'hélice une vitesse de rotation différente de celle du moteur.8. - Device according to one of the preceding claims, characterized in that the transmission means (19,18,17; 134,134a, 135) communicate to the propeller a speed of rotation different from that of the engine. 9. - Dispositif selon l'une des revendications 1 à 8. caractérisé en ce que les moyens de transmission comprennent des engrenages coniques (134,134a,135).9. - Device according to one of claims 1 to 8. characterized in that the transmission means comprise bevel gears (134,134a, 135). 10. - Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que les moyens de transmission comprennent des poulies (17, 19) et une courroie (18).10. - Device according to one of claims 1 to 8, characterized in that the transmission means comprise pulleys (17, 19) and a belt (18).
EP92400398A 1991-02-21 1992-02-14 Heat exchanger Expired - Lifetime EP0500429B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9102098 1991-02-21
FR9102098A FR2673242B1 (en) 1991-02-21 1991-02-21 MOUNTING OF A MOTOR-FAN GROUP ON A MOTOR VEHICLE COOLING RADIATOR.

Publications (2)

Publication Number Publication Date
EP0500429A1 true EP0500429A1 (en) 1992-08-26
EP0500429B1 EP0500429B1 (en) 1994-11-09

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EP (1) EP0500429B1 (en)
DE (1) DE69200636T2 (en)
FR (1) FR2673242B1 (en)

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Also Published As

Publication number Publication date
EP0500429B1 (en) 1994-11-09
DE69200636D1 (en) 1994-12-15
US5242013A (en) 1993-09-07
FR2673242B1 (en) 1995-01-20
FR2673242A1 (en) 1992-08-28
DE69200636T2 (en) 1995-03-16

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