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EP0743501A1 - Heat exchanger for automotive vehicle,provided with a temperature sensor - Google Patents

Heat exchanger for automotive vehicle,provided with a temperature sensor Download PDF

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Publication number
EP0743501A1
EP0743501A1 EP96107591A EP96107591A EP0743501A1 EP 0743501 A1 EP0743501 A1 EP 0743501A1 EP 96107591 A EP96107591 A EP 96107591A EP 96107591 A EP96107591 A EP 96107591A EP 0743501 A1 EP0743501 A1 EP 0743501A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
temperature sensor
housing
exchanger according
tubes
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.)
Ceased
Application number
EP96107591A
Other languages
German (de)
French (fr)
Inventor
Michel Simonin
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
Original Assignee
Valeo Thermique Moteur SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP0743501A1 publication Critical patent/EP0743501A1/en
Ceased legal-status Critical Current

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Classifications

    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/52—Heat exchanger temperature

Definitions

  • the invention relates to a heat exchanger for a heating and / or air conditioning installation of a motor vehicle, of the type comprising a bundle of tubes passing through fins and suitable for being traversed by a fluid, as well as a temperature sensor suitable for measure the temperature of the fluid in the exchanger.
  • Such a heat exchanger is most often produced in the form of a radiator forming part of the vehicle engine cooling circuit.
  • the temperature sensor is a thermal contact of the bimetallic strip type or with a thermodilatable wax capsule which is used to control the starting or stopping of a motorized fan unit serving to pulsate a flow of air capable of sweeping the beam.
  • this temperature sensor is mounted on a water box of the exchanger, into which the tubes of the bundle open.
  • the senor is fixed through a wall of the water box by means of a nut housed in the water box and sealed by tightening a seal mounted between the wall of the water box. and a sensor base.
  • an electric cable and a connector must be provided to connect the temperature sensor to the electric motor of the fan unit.
  • the object of the invention is in particular to overcome the aforementioned drawbacks.
  • the temperature sensor comprises a thermosensitive element maintained in external contact with a selected tube of the bundle, being housed between the fins.
  • the temperature is detected by direct contact of the thermosensitive element of the temperature sensor with the wall of a tube chosen from the bundle of the heat exchanger.
  • thermosensitive element of the temperature sensor is housed between the fins, it is protected from external influences.
  • the heat exchanger comprises an intermediate piece traversed by the tubes and inserted between the fins, this intermediate piece comprising a housing suitable for receiving the heat-sensitive element of the temperature sensor and opening onto the tube selected.
  • This intermediate piece then forms a support for the temperature sensor and at the same time makes it possible to shelter the thermosensitive element of the sensor in the housing.
  • This insert preferably has the general shape of a fin and has holes for passage bundle tubes, the housing of the temperature-sensitive element of the temperature sensor opening laterally into one of the holes for passage of the tubes.
  • this intermediate piece is a plate, for example made of plastic, suitable for being inserted between two fins and having a thickness sufficient to accommodate the heat-sensitive element of the temperature sensor in its thickness.
  • the temperature sensor is carried by a housing fixed on the intermediate piece.
  • the invention applies very particularly to a heat exchanger, in particular of the radiator type, in which the temperature sensor is connected to a fan unit arranged opposite the bundle of tubes.
  • the invention then provides that the fan assembly is supported by the intermediate piece.
  • the intermediate piece supports both the fan unit and the temperature sensor, which simplifies the construction of the heat exchanger by saving an electrical cable and a connector.
  • the fan assembly comprises a support fixed to the intermediate piece and forming a housing for the temperature sensor.
  • this box is included in a tab used for fixing the fan assembly to the intermediate piece.
  • the fins of the bundle are cut locally in the region of the tube chosen to form a housing suitable for receiving the thermosensitive element of the temperature sensor.
  • thermosensitive element is advantageously placed in an elastic ring, for example made of elastomer, introduced into the housing of the fins.
  • the temperature sensor is carried by a housing fixed to the bundle of tubes.
  • This second embodiment of the invention also applies to the specific case of a heat exchanger, in particular of the radiator type, in which the temperature sensor is connected to a fan unit arranged opposite the bundle of tubes.
  • the fan assembly comprises a support fixed to the tube bundle and forming the housing for the temperature sensor.
  • the invention provides that this electric wire is surrounded by a wire guide placed in the housing formed in the fins.
  • the housing formed by cutting the fins is used both for the heat-sensitive element of the temperature sensor and for the wire guide.
  • This wire guide is advantageously carried by the temperature sensor housing.
  • the temperature sensor housing is preferably integral with the motor of the fan unit and houses an electronic control circuit connected to the temperature sensor and to the motor.
  • the temperature sensor is of the negative temperature coefficient (NTC) type.
  • FIG. 1 shows a heat exchanger 10 which, in the example, is a radiator for cooling the engine of a motor vehicle.
  • the exchanger 10 comprises an exchanger body 12 capped at its two ends by two water boxes 14 and 16, respectively by means of two collecting plates 18 and 20.
  • the water box 14 is provided with two pipes 22 and 24 used for the inlet and outlet of a fluid capable of traversing the body of the exchanger.
  • the body 12 comprises a multiplicity of parallel tubes 26 (in the example two rows of twenty tubes) forming a bundle, sealingly connected to the collector plates 18 and 20 and passing through a multiplicity of fins.
  • the latter consist of thin metallic sheets of generally rectangular shape arranged parallel to each other and perpendicular to the tubes 26.
  • the exchanger body 12 incorporates in its middle, that is to say at mid-length of the tubes 26, an intermediate piece 30 which has substantially the same rectangular shape as the fins 28.
  • the piece 30 is produced in the form a rectangular plate, advantageously made of plastic, having a thickness e ( Figures 1 and 4) significantly greater than that of a fin, and the value of which may, for example, be between 1 and 2 cm.
  • the intermediate piece 30 comprises a multiplicity of holes 32 serving for the passage of the tubes 26 of the body 12 (FIG. 3). It is inserted between two consecutive fins during assembly of the body 12 of the exchanger.
  • the exchanger 10 is equipped with a fan motor unit 34 comprising an electric motor 36 driving in rotation about an axis XX, a propeller 38 placed opposite a large face 40 of the body 12.
  • the propeller 38 comprises a hub 42 connected by radial vanes 44 to a profiled skirt 46.
  • the fan unit 34 is fixed directly to the intermediate piece 30 by a support comprising two opposite tabs 48 and 50.
  • the tab 48 of generally triangular shape (Figure 1), is fixed to the intermediate piece 30 by means of a screw 52 ( Figures 1 and 2).
  • the tab 50 is hollow to define an internal housing 54 (FIG. 3) and it is fixed directly to the intermediate piece 30 by a screw 56 (FIGS. 1 to 3).
  • the part 30 has for this purpose a hole 58 formed in its thickness (FIGS. 3 and 4) for receiving the screw 56.
  • a similar hole (not shown) makes it possible to receive the screw 52 of the tab 48.
  • thermosensitive element 62 emerging from an internal face 64 of the tab 50, and produced in the form of a cylindrical finger.
  • the heat-sensitive element 62 is capable of being introduced into a housing 66 formed in the thickness of the intermediate piece 30 and opening out laterally opposite a selected tube 26C of the bundle (FIGS. 3 and 4).
  • the thermosensitive element 62 of the temperature sensor 60 comes into direct external contact with the wall of the tube 26C to detect the temperature of this wall and, consequently, that of the fluid traversing the tubes of the beam.
  • the temperature sensor 60 is, in the example, a sensor of the type with a negative temperature coefficient, also called CTN.
  • the housing 54 houses an electronic control circuit 68 connected, on the one hand, to the temperature sensor 60 and, on the other hand, to the electric motor 36 of the fan unit.
  • the latter is also electrically supplied by an electric wire 70 which runs along a part of the intermediate piece 30 and then passes through the box 54 to supply the electric motor 36.
  • the electronic circuit 68 controls the starting or stopping of the fan unit 34 as a function of the temperature information delivered by the sensor 60.
  • thermosensitive element 62 of the sensor is completely enclosed in the housing 66 and therefore sheltered from any external disturbances.
  • the sensor 60 delivers temperature information which perfectly represents the temperature of the fluid circulating in the heat exchanger.
  • FIGS. 5 to 8 describe a heat exchanger according to a second embodiment of the invention.
  • the heat exchanger shown in FIG. 5 is similar to that of FIG. 1 and also equipped with a fan unit 34.
  • the fan assembly 34 is, in this example, fixed directly to the bundle of tubes by means of a support 72 of generally triangular shape and by three screws 74 passing through the thickness of the bundle.
  • the latter does not have any intermediate piece, as in the case of the embodiment described above.
  • the support 72 is extended by a box 76 of generally parallelepiped shape which is similar to the box 54 of the previous embodiment.
  • the housing 76 houses a temperature sensor 60 identical or similar to that described above, this sensor 60 comprising a thermosensitive element 62 in the form of a cylindrical finger coming into contact with a chosen tube 26C of the bundle.
  • the heat-sensitive element 62 is placed in an elastic ring 78, for example made of elastomer, projecting from the bottom 80 of the housing 76 (FIG. 7).
  • the fins 28 are cut locally in the region of the tube chosen 26C for define a housing 82 used to receive, on the one hand, the heat-sensitive element 62 surrounded by its ring 78 and, on the other hand, a wire guide 84 carried by the housing 76 (FIG. 7).
  • the wire guide 84 crosses the thickness of the tube bundle and is used for the passage of an electric wire 86 supplying the electric motor 36 of the fan unit.
  • the box 76 also houses an electronic control circuit 68, similar to that of the previous embodiment, connected to the temperature sensor 60 and to the electric motor 36.
  • the temperature sensor can be used for purposes other than those of controlling a fan unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The heat exchanger (10) comprises a set of tubes (26) passing through fins (28), with fluid flowing through the tubes and a temperature sensor (60) measuring the temperature within the heat exchanger. The temperature sensors comprises a thermo-sensitive element held externally in contact with a chosen tube (26C) within the set of tubes, and lodged between the fins (28). The thermo-sensitive element is used to control operation of an electrically powered fan (34), the supply cable for which may pass across the heat exchanger in order to include connection to the sensitive element. The wire may lie in a seating formed in the exchanger, with a guide wire surrounding it. The sensor may be NTC element.

Description

L'invention concerne un échangeur de chaleur pour une installation de chauffage et/ou de climatisation de véhicule automobile, du type comprenant un faisceau de tubes traversant des ailettes et propres à être parcourus par un fluide, ainsi qu'un capteur de température propre à mesurer la température du fluide dans l'échangeur.The invention relates to a heat exchanger for a heating and / or air conditioning installation of a motor vehicle, of the type comprising a bundle of tubes passing through fins and suitable for being traversed by a fluid, as well as a temperature sensor suitable for measure the temperature of the fluid in the exchanger.

Un tel échangeur de chaleur est le plus souvent réalisé sous la forme d'un radiateur faisant partie du circuit de refroidissement du moteur du véhicule.Such a heat exchanger is most often produced in the form of a radiator forming part of the vehicle engine cooling circuit.

Généralement, le capteur de température est un thermocontact du type bilame ou à capsule de cire thermodilatable qui sert à commander la mise en marche ou l'arrêt d'un groupe motoventilateur servant à pulser un flux d'air propre à balayer le faisceau.Generally, the temperature sensor is a thermal contact of the bimetallic strip type or with a thermodilatable wax capsule which is used to control the starting or stopping of a motorized fan unit serving to pulsate a flow of air capable of sweeping the beam.

Dans les solutions connues, ce capteur de température est monté sur une boîte à eau de l'échangeur, dans laquelle débouchent les tubes du faisceau.In known solutions, this temperature sensor is mounted on a water box of the exchanger, into which the tubes of the bundle open.

Pour cela, le capteur est fixé au travers d'une paroi de la boîte à eau par l'intermédiaire d'un écrou logé dans la boîte à eau et rendu étanche par serrage d'un joint monté entre la paroi de la boîte à eau et une embase du capteur.For this, the sensor is fixed through a wall of the water box by means of a nut housed in the water box and sealed by tightening a seal mounted between the wall of the water box. and a sensor base.

Le principal inconvénient de cette solution connue est qu'il faut prévoir des aménagements spéciaux au travers de la boîte à eau, notamment pour assurer l'étanchéité du montage du capteur de température.The main drawback of this known solution is that special arrangements must be made through the water box, in particular to ensure the tightness of the mounting of the temperature sensor.

En outre, il faut prévoir un câble électrique et un connecteur pour relier le capteur de température au moteur électrique du groupe motoventilateur.In addition, an electric cable and a connector must be provided to connect the temperature sensor to the electric motor of the fan unit.

L'invention a notamment pour but de surmonter les inconvénients précités.The object of the invention is in particular to overcome the aforementioned drawbacks.

Elle propose à cet effet un échangeur de chaleur du type défini en introduction, dans lequel le capteur de température comprend un élément thermosensible maintenu en contact externe avec un tube choisi du faisceau, en étant logé entre les ailettes.To this end, it offers a heat exchanger of the type defined in the introduction, in which the temperature sensor comprises a thermosensitive element maintained in external contact with a selected tube of the bundle, being housed between the fins.

Ainsi, la détection de la température s'effectue par un contact direct de l'élément thermosensible du capteur de température avec la paroi d'un tube choisi du faisceau de l'échangeur de chaleur.Thus, the temperature is detected by direct contact of the thermosensitive element of the temperature sensor with the wall of a tube chosen from the bundle of the heat exchanger.

Il n'est alors plus nécessaire de prévoir des aménagementsspéciaux dans la boîte collectrice de l'échangeur de chaleur.It is then no longer necessary to provide special arrangements in the header box of the heat exchanger.

En outre, du fait que l'élément thermosensible du capteur de température est logé entre les ailettes, il se trouve protégé des influences extérieures.In addition, because the thermosensitive element of the temperature sensor is housed between the fins, it is protected from external influences.

Dans une forme de réalisation de l'invention, l'échangeur de chaleur comprend une pièce intercalaire traversée par les tubes et insérée entre les ailettes, cette pièce intercalaire comportant un logement propre à recevoir l'élément thermosensible du capteur de température et débouchant sur le tube choisi.In one embodiment of the invention, the heat exchanger comprises an intermediate piece traversed by the tubes and inserted between the fins, this intermediate piece comprising a housing suitable for receiving the heat-sensitive element of the temperature sensor and opening onto the tube selected.

Il suffit alors d'insérer cette pièce intercalaire, entre deux ailettes du faisceau, lors de l'assemblage de ce dernier.It then suffices to insert this intermediate piece, between two fins of the bundle, during the assembly of the latter.

Cette pièce intercalaire forme alors support pour le capteur de température et permet en même temps d' abriter l' élément thermosensible du capteur dans le logement.This intermediate piece then forms a support for the temperature sensor and at the same time makes it possible to shelter the thermosensitive element of the sensor in the housing.

Cette pièce intercalaire affecte de préférence la forme générale d'une ailette et comporte des trous pour le passage des tubes du faisceau, le logement de l'élément thermosensible du capteur de température débouchant latéralement dans l'un des trous de passage des tubes.This insert preferably has the general shape of a fin and has holes for passage bundle tubes, the housing of the temperature-sensitive element of the temperature sensor opening laterally into one of the holes for passage of the tubes.

Avantageusement, cette pièce intercalaire est une plaque, par exemple en matière plastique, propre à être insérée entre deux ailettes et présentant une épaisseur suffisante pour loger l'élément thermosensible du capteur de température dans son épaisseur.Advantageously, this intermediate piece is a plate, for example made of plastic, suitable for being inserted between two fins and having a thickness sufficient to accommodate the heat-sensitive element of the temperature sensor in its thickness.

De préférence, le capteur de température est porté par un boîtier fixé sur la pièce intercalaire.Preferably, the temperature sensor is carried by a housing fixed on the intermediate piece.

L'invention s'applique tout particulièrement à un échangeur de chaleur, notamment du type radiateur, dans lequel le capteur de température est relié à un groupe motoventilateur disposé en regard du faisceau de tubes.The invention applies very particularly to a heat exchanger, in particular of the radiator type, in which the temperature sensor is connected to a fan unit arranged opposite the bundle of tubes.

L'invention prévoit alors que le groupe motoventilateur est supporté par la pièce intercalaire.The invention then provides that the fan assembly is supported by the intermediate piece.

Il en résulte que la pièce intercalaire supporte à la fois le groupe motoventilateur et le capteur de température, ce qui permet de simplifier la construction de l'échangeur de chaleur en économisant un câble électrique et un connecteur.As a result, the intermediate piece supports both the fan unit and the temperature sensor, which simplifies the construction of the heat exchanger by saving an electrical cable and a connector.

Avantageusement, le groupe motoventilateur comprend un support fixé à la pièce intercalaire et formant un boîtier pour le capteur de température.Advantageously, the fan assembly comprises a support fixed to the intermediate piece and forming a housing for the temperature sensor.

Selon une autre caractéristique de l'invention, ce boîtier est inclus dans une patte servant à la fixation du groupe motoventilateur sur la pièce intercalaire.According to another characteristic of the invention, this box is included in a tab used for fixing the fan assembly to the intermediate piece.

Dans une autre forme de réalisation de l'invention, les ailettes du faisceau sont découpées localement dans la région du tube choisi pour former un logement propre à recevoir l'élément thermosensible du capteur de température.In another embodiment of the invention, the fins of the bundle are cut locally in the region of the tube chosen to form a housing suitable for receiving the thermosensitive element of the temperature sensor.

Cet élément thermosensible est avantageusement placé dans une bague élastique, par exemple en élastomère, introduite dans le logement des ailettes.This thermosensitive element is advantageously placed in an elastic ring, for example made of elastomer, introduced into the housing of the fins.

Selon une autre caractéristique de l'invention, le capteur de température est porté par un boîtier fixé sur le faisceau de tubes.According to another characteristic of the invention, the temperature sensor is carried by a housing fixed to the bundle of tubes.

Cette seconde forme de réalisation de l'invention s'applique également au cas particulier d'un échangeur de chaleur, notamment du type radiateur, dans lequel le capteur de température est relié à un groupe motoventilateur disposé en regard du faisceau de tubes.This second embodiment of the invention also applies to the specific case of a heat exchanger, in particular of the radiator type, in which the temperature sensor is connected to a fan unit arranged opposite the bundle of tubes.

Selon l'invention, le groupe motoventilateur comprend un support fixé au faisceau de tubes et formant le boîtier pour le capteur de température.According to the invention, the fan assembly comprises a support fixed to the tube bundle and forming the housing for the temperature sensor.

Dans le cas où le groupe motoventilateur est alimenté par un fil électrique traversant le faisceau de tubes, l'invention prévoit que ce fil électrique soit entouré par un guide-fil placé dans le logement formé dans les ailettes.In the case where the fan unit is powered by an electric wire passing through the bundle of tubes, the invention provides that this electric wire is surrounded by a wire guide placed in the housing formed in the fins.

Ainsi, le logement formé par découpe des ailettes sert à la fois à l'élément thermosensible du capteur de température et au guide-fil.Thus, the housing formed by cutting the fins is used both for the heat-sensitive element of the temperature sensor and for the wire guide.

Ce guide-fil est avantageusement porté par le boîtier du capteur de température.This wire guide is advantageously carried by the temperature sensor housing.

Quelle que soit la forme de réalisation, le boîtier du capteur de température est de préférence solidaire du moteur du groupe motoventilateur et loge un circuit électronique de commande relié au capteur de température et au moteur.Whatever the embodiment, the temperature sensor housing is preferably integral with the motor of the fan unit and houses an electronic control circuit connected to the temperature sensor and to the motor.

Selon encore une autre caractéristique de l'invention, le capteur de température est du type à coefficient de température négatif (CTN).According to yet another characteristic of the invention, the temperature sensor is of the negative temperature coefficient (NTC) type.

Dans la description qui suit, faite seulement à titre d'exemple, on se réfère aux dessins annexés, sur lesquels :

  • la figure 1 est une vue en élévation d'un échangeur de chaleur équipé d'un motoventilateur et d'un capteur de température selon une première forme de réalisation de l'invention;
  • la figure 2 est une vue en coupe selon la ligne II-II de la figure 1;
  • la figure 3 est une vue à échelle agrandie du détail A de la figure 2;
  • la figure 4 est une vue partielle de face du faisceau et de la pièce intercalaire, le boîtier étant enlevé;
  • la figure 5 est une vue en élévation d'un échangeur de chaleur équipé d'un motoventilateur et d'un capteur de température selon une seconde forme de réalisation de l'invention;
  • la figure 6 est une vue en coupe selon la ligne VI-VI de la figure 5;
  • la figure 7 est une vue à échelle agrandie du détail B de la figure 6; et
  • la figure 8 est une vue partielle de face du faisceau au niveau du logement du capteur de température.
In the description which follows, given solely by way of example, reference is made to the appended drawings, in which:
  • Figure 1 is an elevational view of a heat exchanger equipped with a fan motor and a temperature sensor according to a first embodiment of the invention;
  • Figure 2 is a sectional view along line II-II of Figure 1;
  • Figure 3 is an enlarged view of detail A in Figure 2;
  • Figure 4 is a partial front view of the bundle and the insert, the housing being removed;
  • Figure 5 is an elevational view of a heat exchanger equipped with a fan motor and a temperature sensor according to a second embodiment of the invention;
  • Figure 6 is a sectional view along line VI-VI of Figure 5;
  • Figure 7 is an enlarged view of detail B of Figure 6; and
  • Figure 8 is a partial front view of the beam at the housing of the temperature sensor.

On se réfère à la figure 1 qui représente un échangeur de chaleur 10 qui, dans l'exemple, est un radiateur servant au refroidissement du moteur thermique d'un véhicule automobile. L'échangeur 10 comprend un corps d'échangeur 12 coiffé, à ses deux extrémités, par deux boîtes à eau 14 et 16, respectivement par l'intermédiaire de deux plaques collectrices 18 et 20. La boîte à eau 14 est munie de deux tubulures 22 et 24 servant à l'entrée et à la sortie d'un fluide propre à parcourir le corps de l'échangeur.Referring to Figure 1 which shows a heat exchanger 10 which, in the example, is a radiator for cooling the engine of a motor vehicle. The exchanger 10 comprises an exchanger body 12 capped at its two ends by two water boxes 14 and 16, respectively by means of two collecting plates 18 and 20. The water box 14 is provided with two pipes 22 and 24 used for the inlet and outlet of a fluid capable of traversing the body of the exchanger.

Le corps 12 comprend une multiplicité de tubes parallèles 26 (dans l'exemple deux rangées de vingt tubes) formant un faisceau, raccordés à étanchéité aux plaques collectrices 18 et 20 et traversant une multiplicité d'ailettes. Ces dernières sont constituées par des feuilles métalliques minces de forme générale rectangulaire disposées parallèlement entre elles et perpendiculairement aux tubes 26.The body 12 comprises a multiplicity of parallel tubes 26 (in the example two rows of twenty tubes) forming a bundle, sealingly connected to the collector plates 18 and 20 and passing through a multiplicity of fins. The latter consist of thin metallic sheets of generally rectangular shape arranged parallel to each other and perpendicular to the tubes 26.

Le corps d'échangeur 12 incorpore en son milieu, c'est-à-dire à mi-longueur des tubes 26, une pièce intercalaire 30 qui affecte sensiblement la même forme rectangulaire que les ailettes 28. La pièce 30 est réalisée sous la forme d'une plaque rectangulaire, avantageusement en matière plastique, présentant une épaisseur e (figures 1 et 4) nettement supérieure à celle d'une ailette, et dont la valeur peut, à titre d'exemple, être comprise entre 1 et 2 cm.The exchanger body 12 incorporates in its middle, that is to say at mid-length of the tubes 26, an intermediate piece 30 which has substantially the same rectangular shape as the fins 28. The piece 30 is produced in the form a rectangular plate, advantageously made of plastic, having a thickness e (Figures 1 and 4) significantly greater than that of a fin, and the value of which may, for example, be between 1 and 2 cm.

La pièce intercalaire 30 comprend une multiplicité de trous 32 servant au passage des tubes 26 du corps 12 (figure 3). Elle est insérée entre deux ailettes consécutives lors de l'assemblage du corps 12 de l'échangeur.The intermediate piece 30 comprises a multiplicity of holes 32 serving for the passage of the tubes 26 of the body 12 (FIG. 3). It is inserted between two consecutive fins during assembly of the body 12 of the exchanger.

L'échangeur 10 est équipé d'un groupe motoventilateur 34 comprenant un moteur électrique 36 entraînant en rotation, autour d'un axe XX, une hélice 38 disposée en regard d'une grande face 40 du corps 12.The exchanger 10 is equipped with a fan motor unit 34 comprising an electric motor 36 driving in rotation about an axis XX, a propeller 38 placed opposite a large face 40 of the body 12.

L'hélice 38 comprend un moyeu 42 relié par des aubes radiales 44 à une jupe profilée 46. Le groupe motoventilateur 34 est fixé directement sur la pièce intercalaire 30 par un support comprenant deux pattes opposées 48 et 50.The propeller 38 comprises a hub 42 connected by radial vanes 44 to a profiled skirt 46. The fan unit 34 is fixed directly to the intermediate piece 30 by a support comprising two opposite tabs 48 and 50.

La patte 48, de forme générale triangulaire (figure 1), est fixée à la pièce intercalaire 30 au moyen d'une vis 52 (figures 1 et 2).The tab 48, of generally triangular shape (Figure 1), is fixed to the intermediate piece 30 by means of a screw 52 (Figures 1 and 2).

La patte 50 est creuse pour définir un boîtier interne 54 (figure 3) et elle est fixée directement à la pièce intercalaire 30 par une vis 56 (figures 1 à 3). La pièce 30 comporte à cet effet un trou 58 ménagé dans son épaisseur (figures 3 et 4) pour recevoir la vis 56. Un trou analogue (non représenté) permet de recevoir la vis 52 de la patte 48.The tab 50 is hollow to define an internal housing 54 (FIG. 3) and it is fixed directly to the intermediate piece 30 by a screw 56 (FIGS. 1 to 3). The part 30 has for this purpose a hole 58 formed in its thickness (FIGS. 3 and 4) for receiving the screw 56. A similar hole (not shown) makes it possible to receive the screw 52 of the tab 48.

Dans le boîtier 54 est disposé un capteur de température 60 muni d'un élément thermosensible 62 sortant d'une face interne 64 de la patte 50, et réalisé sous la forme d'un doigt cylindrique.In the housing 54 is arranged a temperature sensor 60 provided with a thermosensitive element 62 emerging from an internal face 64 of the tab 50, and produced in the form of a cylindrical finger.

L'élément thermosensible 62 est propre à s'introduire dans un logement 66 formé dans l'épaisseur de la pièce intercalaire 30 et débouchant latéralement en regard d'un tube choisi 26C du faisceau (figures 3 et 4). Lorsque les deux pattes 48 et 50 sont fixées sur la pièce intercalaire, l'élément thermosensible 62 du capteur de température 60 vient en contact externe direct avec la paroi du tube 26C pour détecter la température de cette paroi et, par conséquent, celle du fluide parcourant les tubes du faisceau.The heat-sensitive element 62 is capable of being introduced into a housing 66 formed in the thickness of the intermediate piece 30 and opening out laterally opposite a selected tube 26C of the bundle (FIGS. 3 and 4). When the two tabs 48 and 50 are fixed on the intermediate piece, the thermosensitive element 62 of the temperature sensor 60 comes into direct external contact with the wall of the tube 26C to detect the temperature of this wall and, consequently, that of the fluid traversing the tubes of the beam.

Le capteur de température 60 est, dans l'exemple, un capteur du type à coefficient de température négatif, encore appelé CTN.The temperature sensor 60 is, in the example, a sensor of the type with a negative temperature coefficient, also called CTN.

Le boîtier 54 loge un circuit électronique de commande 68 relié, d'une part, au capteur de température 60 et, d'autre part, au moteur électrique 36 du groupe motoventilateur.The housing 54 houses an electronic control circuit 68 connected, on the one hand, to the temperature sensor 60 and, on the other hand, to the electric motor 36 of the fan unit.

Ce dernier est en outre alimenté électriquement par un fil électrique 70 qui court le long d'une partie de la pièce intercalaire 30 et traverse ensuite le boîter 54 pour alimenter le moteur électrique 36.The latter is also electrically supplied by an electric wire 70 which runs along a part of the intermediate piece 30 and then passes through the box 54 to supply the electric motor 36.

Le circuit électronique 68 commande la mise en marche ou l'arrêt du groupe motoventilateur 34 en fonction des informations de température délivrées par le capteur 60.The electronic circuit 68 controls the starting or stopping of the fan unit 34 as a function of the temperature information delivered by the sensor 60.

L'élément thermosensible 62 du capteur se trouve complètement enfermé dans le logement 66 et donc à l'abri d'éventuelles perturbations extérieures. Il en résulte que le capteur 60 délivre une information de température qui représente parfaitement la température du fluide circulant dans l'échangeur de chaleur.The thermosensitive element 62 of the sensor is completely enclosed in the housing 66 and therefore sheltered from any external disturbances. As a result, the sensor 60 delivers temperature information which perfectly represents the temperature of the fluid circulating in the heat exchanger.

On se réfère maintenant aux figures 5 à 8 pour décrire un échangeur de chaleur selon une seconde forme de réalisation de l'invention.Reference is now made to FIGS. 5 to 8 to describe a heat exchanger according to a second embodiment of the invention.

L'échangeur de chaleur représenté à la figure 5 est semblable à celui de la figure 1 et équipé également d'un groupe motoventilateur 34.The heat exchanger shown in FIG. 5 is similar to that of FIG. 1 and also equipped with a fan unit 34.

Toutefois, le groupe motoventilateur 34 est, dans cet exemple, fixé directement sur le faisceau de tubes par l'intermédiaire d'un support 72 de forme générale triangulaire et par trois vis 74 traversant l'épaisseur du faisceau. Ce dernier ne comporte pas de pièce intercalaire, comme dans le cas de la forme de réalisation précédemment décrite.However, the fan assembly 34 is, in this example, fixed directly to the bundle of tubes by means of a support 72 of generally triangular shape and by three screws 74 passing through the thickness of the bundle. The latter does not have any intermediate piece, as in the case of the embodiment described above.

Le support 72 se prolonge par un boîtier 76 de forme générale parallélépipédique qui s'apparente au boîtier 54 de la forme de réalisation précédente.The support 72 is extended by a box 76 of generally parallelepiped shape which is similar to the box 54 of the previous embodiment.

Le boîtier 76 loge un capteur de température 60 identique ou similaire à celui décrit précédemment, ce capteur 60 comportant un élément thermosensible 62 en forme de doigt cylindrique venant en contact avec un tube choisi 26C du faisceau.The housing 76 houses a temperature sensor 60 identical or similar to that described above, this sensor 60 comprising a thermosensitive element 62 in the form of a cylindrical finger coming into contact with a chosen tube 26C of the bundle.

L'élément thermosensible 62 est placé dans une bague élastique 78, par exemple en élastomère, faisant saillie à partir du fond 80 du boîtier 76 (figure 7).The heat-sensitive element 62 is placed in an elastic ring 78, for example made of elastomer, projecting from the bottom 80 of the housing 76 (FIG. 7).

Comme on le voit sur la figure 8, les ailettes 28 sont découpées localement dans la région du tube choisi 26C pour définir un logement 82 servant à accueillir, d'une part, l'élément thermosensible 62 entouré par sa bague 78 et, d'autre part, un guide-fil 84 porté par le boîtier 76 (figure 7).As can be seen in FIG. 8, the fins 28 are cut locally in the region of the tube chosen 26C for define a housing 82 used to receive, on the one hand, the heat-sensitive element 62 surrounded by its ring 78 and, on the other hand, a wire guide 84 carried by the housing 76 (FIG. 7).

Le guide-fil 84 traverse l'épaisseur du faisceau de tubes et sert au passage d'un fil électrique 86 alimentant le moteur électrique 36 du groupe motoventilateur.The wire guide 84 crosses the thickness of the tube bundle and is used for the passage of an electric wire 86 supplying the electric motor 36 of the fan unit.

Le boîtier 76 loge également un circuit électronique de commande 68, analogue à celui de la forme de réalisation précédente, relié au capteur de température 60 et au moteur électrique 36.The box 76 also houses an electronic control circuit 68, similar to that of the previous embodiment, connected to the temperature sensor 60 and to the electric motor 36.

L'invention n'est pas limitée aux formes de réalisation décrites précédemment à titre d'exemple.The invention is not limited to the embodiments described above by way of example.

Ainsi, le capteur de température peut être utilisé à d'autres fins que celles de la commande d'un groupe motoventilateur.Thus, the temperature sensor can be used for purposes other than those of controlling a fan unit.

Claims (15)

Echangeur de chaleur pour une installation de chauffage et/ou de climatisation de véhicule automobile, du type comprenant un faisceau de tubes (26) traversant des ailettes (28) et propres à être parcourus par un fluide, ainsi qu'un capteur de température (60) propre à mesurer la température du fluide dans l'échangeur de chaleur (10),
caractérisé en ce que le capteur de température (60) comprend un élément thermosensible (62) maintenu en contact externe avec un tube choisi (26C) du faisceau, en étant logé entre les ailettes (28).Heat exchanger for a heating and / or air conditioning installation of a motor vehicle, of the type comprising a bundle of tubes (26) passing through fins (28) and suitable for being traversed by a fluid, as well as a temperature sensor ( 60) suitable for measuring the temperature of the fluid in the heat exchanger (10),
characterized in that the temperature sensor (60) comprises a thermosensitive element (62) held in external contact with a selected tube (26C) of the bundle, being housed between the fins (28). Echangeur de chaleur selon la revendication 1, caractérisé en ce qu'il comprend une pièce intercalaire (30) traversée par les tubes (26) et insérée entre les ailettes (28), cette pièce intercalaire (30) comportant un logement (66) propre à recevoir l'élément thermosensible (62) du capteur de température (60) et débouchant sur le tube choisi (26C).Heat exchanger according to claim 1, characterized in that it comprises an intermediate piece (30) through which the tubes (26) pass and inserted between the fins (28), this intermediate piece (30) comprising a clean housing (66) receiving the thermosensitive element (62) from the temperature sensor (60) and opening onto the chosen tube (26C). Echangeur de chaleur selon la revendication 2, caractérisé en ce que la pièce intercalaire (30) affecte la forme générale d'une ailette (28) et comporte des trous (32) pour le passage des tubes (26) du faisceau, et en ce que le logement (66) pour l'élément thermosensible (62) du capteur de température (60) débouche latéralement dans l'un des trous de passage (32) des tubes (26).Heat exchanger according to claim 2, characterized in that the intermediate piece (30) has the general shape of a fin (28) and has holes (32) for the passage of the tubes (26) of the bundle, and in that that the housing (66) for the thermosensitive element (62) of the temperature sensor (60) opens laterally into one of the passage holes (32) of the tubes (26). Echangeur de chaleur selon l'une des revendications 2 et 3, caractérisé en ce que la pièce intercalaire (30) est une plaque, par exemple en matière plastique, propre à être insérée entre deux ailettes (28) et présentant une épaisseur (e) suffisante pour loger l'élément thermosensible (62) du capteur de température (60) dans son épaisseur.Heat exchanger according to one of claims 2 and 3, characterized in that the intermediate piece (30) is a plate, for example made of plastic, suitable for being inserted between two fins (28) and having a thickness (e) sufficient to accommodate the thermosensitive element (62) of the temperature sensor (60) in its thickness. Echangeur de chaleur selon l'une des revendications 2 à 4, caractérisé en ce que le capteur de température (60) est porté par un boîtier (54) fixé sur la pièce intercalaire (30).Heat exchanger according to one of Claims 2 to 4, characterized in that the temperature sensor (60) is carried by a housing (54) fixed on the intermediate piece (30). Echangeur de chaleur selon la revendication 5, dans lequel le capteur de température (60) est relié à un groupe motoventilateur (34) disposé en regard du faisceau de tubes (26), caractérisé en ce que le groupe motoventilateur (34) comprend un support (48, 50) fixé à la pièce intercalaire (30) et formant le boîtier (54) pour le capteur de température (60).Heat exchanger according to claim 5, in which the temperature sensor (60) is connected to a fan unit (34) arranged opposite the bundle of tubes (26), characterized in that the fan unit (34) comprises a support (48, 50) fixed to the intermediate piece (30) and forming the housing (54) for the temperature sensor (60). Echangeur de chaleur selon l'une des revendications 5 et 6, caractérisé en ce que le boîtier (54) est inclus dans une patte (50) servant à la fixation du groupe motoventilateur (34) sur la pièce intercalaire (30).Heat exchanger according to one of claims 5 and 6, characterized in that the housing (54) is included in a lug (50) used for fixing the fan assembly (34) to the intermediate piece (30). Echangeur de chaleur selon la revendication 1, caractérisé en ce que les ailettes (28) du faisceau sont découpées dans la région du tube choisi (26C) pour former un logement (82) propre à recevoir l'élément thermosensible (62) du capteur de température (60).Heat exchanger according to claim 1, characterized in that the fins (28) of the bundle are cut in the region of the selected tube (26C) to form a housing (82) suitable for receiving the heat-sensitive element (62) of the temperature (60). Echangeur de chaleur selon la revendication 8, caractérisé en ce que l'élément thermosensible (62) du capteur de température (60) est placé dans une bague élastique (78) introduite dans le logement (82) découpé dans les ailettes.Heat exchanger according to claim 8, characterized in that the thermosensitive element (62) of the temperature sensor (60) is placed in an elastic ring (78) inserted in the housing (82) cut out in the fins. Echangeur de chaleur selon l'une des revendications 8 et 9, caractérisé en ce que le capteur de température (60) est porté par un boîtier (76) fixé sur le faisceau de tubes.Heat exchanger according to one of claims 8 and 9, characterized in that the temperature sensor (60) is carried by a housing (76) fixed to the bundle of tubes. Echangeur de chaleur selon la revendication 10, dans lequel le capteur de température (60) est relié à un groupe motoventilateur (34) disposé en regard du faisceau de tubes (26), caractérisé en ce que le groupe motoventilateur (34) comprend un support (72) fixé au faisceau de tubes et formant le boîtier (76) pour le capteur de température (60).Heat exchanger according to claim 10, in which the temperature sensor (60) is connected to a fan unit (34) arranged opposite the bundle of tubes (26), characterized in that the fan unit (34) comprises a support (72) fixed to the tube bundle and forming the housing (76) for the temperature sensor (60). Echangeur de chaleur selon la revendication 11, dans lequel le groupe motoventilateur (34) est alimenté par un fil électrique (86) traversant le faisceau de tubes, caractérisé en ce que le fil électrique (86) est entouré par un guide-fil (84) placé dans le logement (82) formé dans les ailettes.Heat exchanger according to claim 11, in which the fan assembly (34) is supplied by an electric wire (86) passing through the bundle of tubes, characterized in that the electric wire (86) is surrounded by a wire guide (84 ) placed in the housing (82) formed in the fins. Echangeur de chaleur selon la revendication 12, caractérisé en ce que le guide-fil (84) est porté par le boîtier (76) du capteur de température (60).Heat exchanger according to claim 12, characterized in that the wire guide (84) is carried by the housing (76) of the temperature sensor (60). Echangeur de chaleur selon l'une des revendications 5 à 7 et 10 à 13, caractérisé en ce que le boîtier (54;76) est solidaire du moteur électrique (36) du groupe motoventilateur (34) et loge un circuit électronique de commande (68) relié au capteur de température (60) et au moteur électrique (36).Heat exchanger according to one of claims 5 to 7 and 10 to 13, characterized in that the housing (54; 76) is integral with the electric motor (36) of the fan unit (34) and houses an electronic control circuit ( 68) connected to the temperature sensor (60) and to the electric motor (36). Echangeur de chaleur selon l'une des revendications 1 à 14, caractérisé en ce que le capteur de température (60) est du type à coefficient de température négatif (CTN).Heat exchanger according to one of claims 1 to 14, characterized in that the temperature sensor (60) is of the type with negative temperature coefficient (NTC).
EP96107591A 1995-05-18 1996-05-13 Heat exchanger for automotive vehicle,provided with a temperature sensor Ceased EP0743501A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9505933A FR2734348B1 (en) 1995-05-18 1995-05-18 HEAT EXCHANGER PROVIDED WITH A TEMPERATURE SENSOR FOR A MOTOR VEHICLE
FR9505933 1995-05-18

Publications (1)

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EP0743501A1 true EP0743501A1 (en) 1996-11-20

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EP (1) EP0743501A1 (en)
BR (1) BR9602278A (en)
FR (1) FR2734348B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0965737A3 (en) * 1998-06-17 2002-03-20 Siemens Canada Limited Internal combustion engine total cooling control system
US20080264600A1 (en) * 2005-10-20 2008-10-30 Behr Gmbh & Co. Kg Apparatus for Conveying a Cooling Air Flow

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3096763B1 (en) * 2019-05-27 2023-05-12 Valeo Systemes Thermiques Motor vehicle electric radiator equipped with a temperature measuring device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257554A (en) * 1978-11-20 1981-03-24 Flex-A-Lite Products Corporation Fan assembly
EP0470905A1 (en) * 1990-08-08 1992-02-12 Valeo Thermique Moteur Control casing for the cooling of an automobile engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257554A (en) * 1978-11-20 1981-03-24 Flex-A-Lite Products Corporation Fan assembly
EP0470905A1 (en) * 1990-08-08 1992-02-12 Valeo Thermique Moteur Control casing for the cooling of an automobile engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0965737A3 (en) * 1998-06-17 2002-03-20 Siemens Canada Limited Internal combustion engine total cooling control system
US20080264600A1 (en) * 2005-10-20 2008-10-30 Behr Gmbh & Co. Kg Apparatus for Conveying a Cooling Air Flow
US8230910B2 (en) * 2005-10-20 2012-07-31 Behr Gmbh & Co. Kg Apparatus for conveying a cooling air flow having a cooling domes

Also Published As

Publication number Publication date
FR2734348B1 (en) 1997-07-04
FR2734348A1 (en) 1996-11-22
BR9602278A (en) 1998-01-13
MX9601873A (en) 1997-07-31

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