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EP1462733B1 - Electric heating device having a heating body - Google Patents

Electric heating device having a heating body Download PDF

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Publication number
EP1462733B1
EP1462733B1 EP04005884.4A EP04005884A EP1462733B1 EP 1462733 B1 EP1462733 B1 EP 1462733B1 EP 04005884 A EP04005884 A EP 04005884A EP 1462733 B1 EP1462733 B1 EP 1462733B1
Authority
EP
European Patent Office
Prior art keywords
heating body
bases
plates
rails
heating
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.)
Expired - Lifetime
Application number
EP04005884.4A
Other languages
German (de)
French (fr)
Other versions
EP1462733A1 (en
Inventor
Pascal Guigou
Stéphane Pernet
Philippe Pierres
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 Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Publication of EP1462733A1 publication Critical patent/EP1462733A1/en
Application granted granted Critical
Publication of EP1462733B1 publication Critical patent/EP1462733B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0435—Structures comprising heat spreading elements in the form of fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0441—Interfaces between the electrodes of a resistive heating element and the power supply means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0441—Interfaces between the electrodes of a resistive heating element and the power supply means
    • F24H3/0447—Forms of the electrode terminals, e.g. tongues or clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0452—Frame constructions
    • F24H3/047—Multiple-piece frames assembled on their four or more edges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F24H9/1872—PTC

Definitions

  • the invention relates to electric heating devices, in particular for air heating installations in motor vehicles.
  • the heating of the air intended for heating the passenger compartment of a motor vehicle with a heat engine, as well as for defogging and deicing, is ensured by heat exchange between an air flow and a engine coolant circulating in an exchanger.
  • Such a device generally comprises a heating body comprising a plurality of parallel conductive plates between which are mounted heating resistive elements and radiant elements increasing the heat exchange surface with the air flow passing through the heating device.
  • the various elements of the heating body are generally assembled together by mechanical means.
  • such a bonded heating body must be connected to the plastic bases taking into account the dispersions and manufacturing tolerances of the one-piece body without penalizing the assembly time of such a heating device.
  • the purpose of the invention is to simplify and optimize the production of an electric heating device comprising a heating element, in particular to reduce manufacturing and assembly costs compared with devices of the prior art.
  • an electric heating device comprising a heating body comprising a plurality of conductive plates between which heating resistive elements are mounted and radiant elements increasing the heat exchange surface with a flow of air passing through the heating device.
  • heating the heating body being disposed between a front base and a rear base, the heating body further comprising at least one holding plate of the heating body having at its ends anchoring means cooperating with associated receiving means, by clipping , and integrated in the front and rear bases, in order to fix the heating body between these front and rear bases, characterized in that the front and rear bases have a shape of rectangular housings adapted to accommodate the ends of the heating body and having on their lateral sides of the rails protruding from the bases and cooperating with two holding plates (5a, 5b) arranged on the two outer lateral sides of the heating body (3).
  • At least a portion of said conductive plates protrude from the front base to form terminals for connection to a power supply circuit.
  • the receiving means may comprise flexible tabs arranged in the upper and lower portions of the front and rear bases.
  • the two holding plates of the heating body may comprise transverse walls having a U-shape at least on their two ends, each of the anchoring means is formed by cuts in said transverse walls, so that the flexible tongues fit together. in the cutouts of the outer conductive plates.
  • the receiving means may comprise flexible tabs arranged in said U-shaped rails.
  • the two holding plates of the heating body may have transverse walls having a U-shape at least on both ends.
  • the two outer conductive plates are U-shaped in all their lengths.
  • each of the anchoring means is formed by a recess in the plane of each of said holding plates having the U-shape on at least their two ends, and the tongues hoses are formed on the side walls of the U-shaped rails, so that said flexible tabs fit into the recesses of the holding plates.
  • each of the anchoring means is formed by cuts in the transverse walls of said U-shaped holding plates on at least their two ends, and the flexible tongues are formed in the U-branches of the rails, so that the flexible tabs are embedded in the cutouts of the holding plates.
  • each of the U-shaped rails has on its side wall a flexible blade ensuring accurate setting of the holding plates thus avoiding any problem related to the geometric dispersion of the heating body.
  • the anchoring means of the two holding plates comprise tabs intended to be folded on the associated receiving means integrated in the front and rear bases.
  • Each of the receiving means may comprise depressions in the upper and lower portions of the front and rear bases, so that said tabs of said holding plates bend in the respective recesses.
  • the rectangular housings of the front and rear bases have on their lateral sides U-shaped rails and each of the reception means comprises lugs formed on these rails, so that said lugs of said plates keep bending on the rails just outside the lugs.
  • the two holding plates can have a U-shape in all their lengths between the lugs and fit on the rails of the front and rear bases.
  • each of the U-shaped rails has on its side wall a flexible blade ensuring accurate setting of the holding plates thus avoiding any problem related to the geometric dispersion of the heating body.
  • all the elements of the heating body are fixed together by gluing, with the exception of the two holding plates.
  • all the elements of the heating body are fixed together by gluing, including the two support plates.
  • the conductive plates have folds at the ends of the heating body so that the connection terminals have a standard pitch.
  • the one or more holding plates can also form one or more conductive plates.
  • the front and rear bases can be made of plastic.
  • the figure 1 shows schematically an unclaimed heating device for example for a motor vehicle air conditioning installation.
  • the heating device 1 comprises a heating body 3 comprising a plurality of conductive plates 4 between which resistive heating elements 7 and radiant elements 9 are mounted.
  • the resistive elements 7 may be positive temperature coefficient (PTC) resistors which are usually in the form of blocks or stones. These elements, because of the strong increase in their electrical resistance from a temperature threshold (Curie point), give the heating device the ability to self-regulate as a function of temperature, which avoids any excessive heating. potentially dangerous.
  • PTC positive temperature coefficient
  • the radiant elements 9 are corrugated metal strips, for example made of steel or aluminum, which extend between the plates 4, along them, and make it possible to increase the heat exchange surface with a flow of air passing through the heating device 1 perpendicular to the plane of the heating body 3.
  • the figure 1 shows that the resistive elements 7 are arranged in rows, each of which has a plurality of resistive elements 7 spaced apart from each other along the heating body 3. One side of each resistive element 7 is in contact with a conductive plate 4, while the other side of each resistive element 7 is in contact with a radiating element 9. In turn, the radiant element 9 is disposed along another conductive plate 4.
  • the figure 1 illustrates four conductive plates 4, a holding plate 5 substantially in the middle of the heating body 3, two rows of resistive element 7, and four rows of radiant element 9.
  • these numbers can be any, and in particular we can consider that the heating body comprises two holding plates disposed on each of the two outer lateral sides of this body as will be described further with regard to the figure 3 .
  • resistive elements 7 for a row of resistive elements 7, one side of these resistive elements 7 may be in direct electrical contact with a conductive plate 4 while the other side of the resistive elements 7 may be in electrical contact with the adjacent conductive plate 4 through the radiant element 9 disposed between the two conductive plates. Therefore, the resistive elements 7 arranged in a row can be fed in parallel between two consecutive conductive plates 4.
  • the heating body may comprise any other configuration known in the prior art.
  • the resistive elements may be arranged in bars. Each bar comprises a plurality of resistive elements spaced from each other and fed in parallel between two conductive plates.
  • heating body 3 can be held together by gluing or by other types of assembly.
  • the heating body 3 is disposed between a front base 11 and a rear base 13. These bases may for example be in the form of rectangular housings adapted to receive the front and rear ends of the heating body 3.
  • front 11 and rear 13 bases are electrically insulating material, for example, plastic.
  • the holding plate 5 can form a conductive plate, but it can also be insulating.
  • At least a portion of the conductive plates 4 protrude from the front base 11 to form terminals 15 for connection to a power supply circuit not shown.
  • the holding plate 5 of the heating body 3 comprises at its ends anchoring means 17 cooperating with associated receiving means 19 integrated in the front 11 and rear 13 bases. This allows to fix the heating body 3 between these bases before 11 and rear 13.
  • the anchoring means 17 can cooperate with the associated receiving means 19 by clipping.
  • the ends of the holding plate 5 may be in the form of a harpoon thus allowing the anchoring of this holding plate in the front 11 and rear bases 13. Once anchored, the harpoon prohibits any movement.
  • heating body 3 can be fixed together, for example by gluing.
  • FIGS. 2A and 2B illustrate a first, unclaimed embodiment of a heater 1 comprising a heater 3 having a plurality of conductive plates 4 between which heating resistive elements (not shown) and radiant elements 9 of which only a portion are shown .
  • the heating body 3 is disposed between a front base 11 and a rear base 13. These front 11 and rear 13 bases have the form of rectangular housings adapted to receive the front and rear ends of the heating body 3.
  • the front base 11 comprises in in addition, a housing 21 inside which are arranged the connection terminals 15 (see figure 1 ), thereby forming a connector for connecting the heating body 3 to an electric power circuit powered for example by the vehicle battery.
  • the front 11 and rear 13 bases comprise receiving means 19 intended to cooperate with anchoring means 17 arranged at the ends of a holding plate 5 of the heating body 3.
  • These receiving means 19 comprise flexible tabs 125 arranged in the upper and lower portions of the front 11 and rear 13 bases.
  • Each of the bases comprises at least one flexible tongue.
  • each has two flexible tabs 125, substantially in the middle of the base.
  • the partial section of the Figure 2B shows that the holding plate 5 of the heating body 3 has transverse walls 37 giving them a U-shape at least at both ends. This example shows that except for its ends, the holding plate 5 is square.
  • each of the anchoring means 17 is formed by cutouts 39 in said transverse walls 37, so that the flexible tongues 125 are clipped or fit into these cutouts 39 of the holding plate 5.
  • the figure 3 is a variant of the figure 1 schematically showing a heating device whose heating body 3 comprises two holding plates 5a and 5b disposed on each of the two outer lateral sides of the heating body 3.
  • the figure 3 illustrates three conductive plates 4, two holding plates 5a and 5b, two rows of resistive element 7, and four rows of radiant element 9 but obviously these numbers can be arbitrary.
  • the holding plates 5a and 5b can also form conductive plates.
  • heating body 3 can be held together by gluing or by other types of assembly.
  • the two holding plates 5a and 5b of the heating body 3 each comprise at their two ends anchoring means 17 cooperating with associated receiving means 19 integrated in the front plates 11 and rear 13. This allows to maintain fixedly the heating body 3 between these bases before 11 and rear 13.
  • the anchoring means 17 can cooperate with the associated receiving means 19 by clipping.
  • the ends of the two holding plates Sa and 5b may have the shape of a harpoon thus allowing the anchoring of these outer conductive plates in the front 11 and rear bases 13. Once anchored, the harpoon prohibits any movement.
  • the anchoring means 17 of the two holding plates 5a and 5b may comprise lugs intended to be folded on the associated receiving means 19 integrated in the front 11 and rear 13 bases.
  • the heating body 3 can be fixed to each other, for example by gluing, with the exception of the two outer holding plates 5a and 5b.
  • the two outer holding plates 5a and 5b may not be part of the heating body 3 as such, and their anchors in the front 11 and rear 13 bases is sufficient to firmly hold the heating body 3 between these bases before 11 and back 13.
  • heating body 3 all the elements of the heating body 3 are fixed together, for example by gluing, including the two support plates 5a and 5b.
  • these two holding plates are an integral part of the heating body 3 and can be arranged inside the heating body.
  • FIGS. 4A to 8C illustrate several embodiments of a heating device comprising a heating body held between the front and rear bases by clipping.
  • FIGS. 4A to 4E illustrate a first, unclaimed embodiment of a heater 1 comprising a heater 3 having a plurality of conductive plates 5 between which heating resistive elements (not shown), two holding plates 5a1 and 5b1, and radiant elements 9 of which only a part is represented.
  • the heating body 3 is disposed between a front base 11 and a rear base 13. These front 11 and rear 13 bases have the form of rectangular housings adapted to receive the front and rear ends of the heating body 3.
  • the front base 11 comprises in in addition, a housing 21 inside which are arranged the connection terminals 15 (see figure 1 ), thereby forming a connector for connecting the heating body 3 to an electric power circuit powered for example by the vehicle battery.
  • Figure 4B illustrates a perspective view of the front base 11 showing openings 23 through which are introduced, at least a portion of the conductive plates to form the connection terminals.
  • the front 11 and rear 13 bases comprise receiving means 19 intended to cooperate with anchoring means 17 arranged at the ends of the two holding plates 5a1 and 5b1 of the heating body 3.
  • These receiving means 19 comprise flexible tongues 25 arranged in the upper and lower portions of the front 11 and rear 13 bases.
  • Each of the bases comprises at least one flexible tongue.
  • each has four flexible tabs 25, for example one in each corner, and each tab has a light 27.
  • each of the anchoring means 17 of the two holding plates 5a1 and 5b1 comprises, in the planes of these holding plates, opposite hooks 29, forming a kind of harpoon thus allowing these hooks 29 to be clipped or to fit into the slots 27 of the flexible tongues 25 in order to fix the heating body 3 between the front 11 and rear 13 bases.
  • these harpoons have the additional function of limiting the clearance between the two bases.
  • Figures 4B and 4C show that the front 11 and rear 13 bases may advantageously comprise first slots 31 for receiving the ends of one of the two holding plates (for example the plate 5b1) and second slots 33 for receiving the ends of the other holding plate 5a1.
  • the first 31 and second 33 slots thus ensure a correct adjustment of the holding plates 5b1 and 5a1 respectively. These slots thus provide guidance for the harpoons to fall into the holes 27.
  • first slots 31 provide a precise wedging of the holding plate 5b1 they host, and the second slots 33 have a clearance sufficient to accommodate said other holding plate 5a1 thus avoiding any problem related to the geometric dispersion, c that is, the manufacturing tolerances of the glued heating body 3.
  • the mounting of the heating body 3 in the front 11 and rear 13 bases is made accurately and simplicity.
  • connection terminals 15 are standard. Therefore, the conductive plates 4 may have folds 35 at the ends of the heating body 3 in order to respect the standard pitch between the connection terminals.
  • these folds 35 have other functions. They make it possible to maintain the radiant elements 9 in the heating body 3, for example during the gluing process. They also have a stop function, defining perfectly the length which separates the two bases (see Figure 5C ).
  • the Figure 4A shows that the heating body 3 has five rows of radiant elements 9 and that these two holding plates 5a1 and 5b1 are square-shaped.
  • the figure 5 is a variant of the heater shown in the Figure 4A .
  • the two holding plates 5a2 and 5b2 are U-shaped in all their lengths.
  • FIG. 6A is a perspective view of another unclaimed embodiment. According to this mode, see also Figures 6B and 6D , the receiving means are as before, flexible tabs 125 arranged in the upper and lower portions of the front 11 and rear 13 bases.
  • the two holding plates 5a3 and 5b3 of the heating body 3 comprise walls transverse 37 giving them a U-shape at least at both ends. Furthermore, each of the anchoring means 17 is formed by cutouts 39 in said transverse walls 37, so that the flexible tabs 125 are clipped or fit into these cutouts 39 of the holding plates 5a3 and 5b3.
  • the Figure 6A shows that except for their ends, the holding plates 5a3 and 5b3 are square-shaped. It is also possible that they are U-shaped in all their lengths.
  • FIGS 7A to 8C illustrate embodiments of a heating device 1 according to the invention.
  • the rectangular housings of the front 11 and rear 13 bases have on their lateral sides rails 41 projecting from the bases, for example U-shaped.
  • the two holding plates 5a4, 5b4, 5a5 and 5b5 of the heating body comprise walls having a U-shape only on their two ends and at the height of the rails 41 of the front 11 and rear 13 bases.
  • Figures 7A to 8C show that the receiving means comprise flexible tongues 225, 325 arranged in the rails 41 of the front 11 and rear 13 bases.
  • the flexible tabs 225 are formed on the side walls of the rails 41 of the bases.
  • each of the anchoring means 17 is formed by a recess 43 at the end and in the plane of each of the holding plates 5a4 and 5b4.
  • the flexible tongues 225 cluck or fit into the recesses 43 of the holding plates 5a4 and 5b4.
  • the holding plate 5a4 is a conductive plate having a fold 135 in order to respect a standard pitch between the connection terminals 15 but also to retain the radiating elements 9.
  • the pitch between the conductive plates 4 is identical to that between the terminals 15 connection, these conductive plates 4 have folds or flaps 35 for wedging the radiant elements 9 which are not represented in the Figures 7A and 7C to clarify more.
  • the flexible tongues 325 are formed in the upper and lower portions of the U-shaped rails 41 of the front 11 and rear 13 bases.
  • each of the anchoring means is formed by cutouts 45 in the transverse walls of the holding plates 5a5 and 5b5, so that the flexible tongues 325 are clipped or fit into these cutouts 45 during assembly of the body heating 3 between the front 11 and rear 13 bases.
  • each of the rails 41 U-shaped front plates 11 and rear 13 may have on its side wall a flexible blade 47 providing a precise wedging of the holding plates thus avoiding any problem related to the geometric dispersion of the heating body.
  • FIGS 9A to 10C illustrate other embodiments of a heating device 1 in which a heating body 3 is held between the front 11 and rear 13 bases by folding a portion of the two holding plates 5a6, 5b6, 5a7 and 5b7 on reception means 19 integrated in the front 11 and rear 13 bases.
  • anchoring means 17 of the two holding plates 5a6, 5b6, 5a7 and 5b7 comprise tabs 51 intended to be folded on the associated receiving means 19 integrated in the front 11 and rear 13 bases.
  • each of the receiving means 19 has recesses 53 in the upper and lower portions of the front 11 and rear 13 bases, so that the tabs 51 at the ends of the holding plates 5a6 and 5b6 bend in the respective recesses.
  • Figures 10A to 10C show that the rectangular housings of the front 11 and rear 13 bases have on their lateral sides rails 141, for example U-shaped and each of the receiving means 19 has lugs 55 formed on these rails, so that the tabs 51 to ends of the holding plates 5a7 and 5b7 fold on the rails 141 just outside the lugs 55.
  • the two holding plates 5a7 and 5b7 have a U-shape in all their lengths between the lugs 55 and fit on the rails 141 of the front 11 and rear 13 bases.
  • the small tabs 51 at the ends of the holding plates 5a7 and 5b7 are raised to allow the mounting of the bases 11 and 13 by making them slide in the two holding plates 5a7 and 5b7. Then, these small tabs 51 are folded over the rails 141 thus enclosing the lugs 55.
  • each of the rails 141 in the shape of a U may comprise on its side wall a flexible strip 147 providing a precise wedging of the holding plates 5a7 and 5b7 thus avoiding any problem related to the geometrical dispersion of the heating body 3.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)

Description

L'invention concerne les dispositifs de chauffage électrique, notamment pour des installations de chauffage d'air dans des véhicules automobiles.The invention relates to electric heating devices, in particular for air heating installations in motor vehicles.

De façon bien connue, le réchauffage de l'air destiné au chauffage de l'habitacle d'un véhicule automobile à moteur thermique, ainsi qu'au désembuage et au dégivrage, est assuré par échange de chaleur entre un flux d'air et un liquide de refroidissement du moteur circulant dans un échangeur.In a well-known manner, the heating of the air intended for heating the passenger compartment of a motor vehicle with a heat engine, as well as for defogging and deicing, is ensured by heat exchange between an air flow and a engine coolant circulating in an exchanger.

Il est connu également qu'au démarrage et pendant un certain laps de temps suivant le démarrage, les calories véhiculées par le liquide de refroidissement du moteur peuvent être insuffisantes pour assurer un chauffage rapide et efficace de l'habitacle. Cela est observé plus particulièrement avec certains types de moteur et présente un réel inconvénient par temps très froid car non seulement la température interne de l'habitacle ne peut être élevée rapidement, mais en outre les fonctions de dégivrage et désembuage ne peuvent être assurées efficacement.It is also known that at startup and for a certain period of time after starting, the calories carried by the engine coolant may be insufficient to ensure rapid and efficient heating of the passenger compartment. This is observed more particularly with certain types of engine and has a real disadvantage in very cold weather because not only the internal temperature of the passenger compartment can be raised quickly, but also the functions of defrosting and defogging can not be ensured effectively.

Pour remédier à ces inconvénients, il a été proposé de monter un dispositif de chauffage électrique complémentaire dans le flux d'air dirigé vers l'habitacle.To overcome these drawbacks, it has been proposed to mount a complementary electric heating device in the air flow directed towards the passenger compartment.

Un tel dispositif comprend généralement un corps chauffant comportant une pluralité de plaques conductrices parallèles entre lesquelles sont montés des éléments résistifs chauffant et des éléments radiants augmentant la surface d'échange thermique avec le flux d'air traversant le dispositif de chauffage. Les différents éléments du corps chauffant sont généralement assemblés entre eux par un moyen mécanique.Such a device generally comprises a heating body comprising a plurality of parallel conductive plates between which are mounted heating resistive elements and radiant elements increasing the heat exchange surface with the air flow passing through the heating device. The various elements of the heating body are generally assembled together by mechanical means.

Ainsi, des ressorts et/ou des cadres métalliques sont nécessaires pour exercer un effort sur ce corps afin d'assurer un contact électrique entre les éléments du corps chauffant et de le maintenir entre des embases. Ces ressorts compliquent le montage du corps chauffant entre ces embases. Un exemple est illustré dans le document EP1 130 337 .Thus, springs and / or metal frames are necessary to exert a force on this body to ensure electrical contact between the elements of the heating body and to maintain it between bases. These springs complicate the mounting of the heating body between these bases. An example is shown in the document EP1 130 337 .

Afin de remédier à ce problème, on a prévu des corps monobloc collés, la colle assurant alors le maintien mécanique en même temps que le lien électrique entre les éléments du corps monobloc.To remedy this problem, there is provided monobloc bodies glued, the glue then ensuring the mechanical maintenance at the same time as the electrical link between the elements of the one-piece body.

Cependant, un tel corps chauffant collé doit être relié aux embases plastiques en tenant compte des dispersions et tolérances de fabrication du corps monobloc sans pénaliser le temps d'assemblage d'un tel dispositif de chauffage.However, such a bonded heating body must be connected to the plastic bases taking into account the dispersions and manufacturing tolerances of the one-piece body without penalizing the assembly time of such a heating device.

Objet et résumé de l'inventionObject and summary of the invention

L'invention a pour but de simplifier et d'optimiser la réalisation d'un dispositif de chauffage électrique comprenant un corps chauffant, notamment pour en réduire les coûts de fabrication et de montage par rapport aux dispositifs de l'art antérieur.The purpose of the invention is to simplify and optimize the production of an electric heating device comprising a heating element, in particular to reduce manufacturing and assembly costs compared with devices of the prior art.

Ce but est atteint grâce à un dispositif de chauffage électrique comprenant un corps chauffant comportant une pluralité de plaques conductrices entre lesquelles sont montés des éléments résistifs chauffant et des éléments radiants augmentant la surface d'échange thermique avec un flux d'air traversant le dispositif de chauffage, le corps chauffant étant disposé entre une embase avant et une embase arrière, le corps chauffant comportant en outre au moins une plaque de maintien du corps chauffant comportant à ses extrémités des moyens d'ancrage coopérant avec des moyens de réception associés, par clippage, et intégrés dans les embases avant et arrière, afin de maintenir fixement le corps chauffant entre ces embases avant et arrière, caractérisé en ce que les embases avant et arrière ont une forme de boîtiers rectangulaires adaptés pour accueillir les extrémités du corps chauffant et présentant sur leurs côtés latéraux des rails débordant des embases et coopérant avec deux plaques de maintien (5a, 5b) disposées sur les deux côtés latéraux extérieurs du corps chauffant (3).This object is achieved by means of an electric heating device comprising a heating body comprising a plurality of conductive plates between which heating resistive elements are mounted and radiant elements increasing the heat exchange surface with a flow of air passing through the heating device. heating, the heating body being disposed between a front base and a rear base, the heating body further comprising at least one holding plate of the heating body having at its ends anchoring means cooperating with associated receiving means, by clipping , and integrated in the front and rear bases, in order to fix the heating body between these front and rear bases, characterized in that the front and rear bases have a shape of rectangular housings adapted to accommodate the ends of the heating body and having on their lateral sides of the rails protruding from the bases and cooperating with two holding plates (5a, 5b) arranged on the two outer lateral sides of the heating body (3).

Ainsi, le montage du corps chauffant dans le dispositif de chauffage est facilité.Thus, the mounting of the heating body in the heating device is facilitated.

Au moins une partie desdites plaques conductrices fait saillie à l'embase avant pour former des bornes de raccordement à un circuit d'alimentation électrique.At least a portion of said conductive plates protrude from the front base to form terminals for connection to a power supply circuit.

Les moyens de réception peuvent comporter des languettes flexibles aménagées dans les parties supérieure et inférieure des embases avant et arrière.The receiving means may comprise flexible tabs arranged in the upper and lower portions of the front and rear bases.

Les deux plaques de maintien du corps chauffant peuvent comporter des parois transversales présentant une forme en U au moins sur leurs deux extrémités, chacun des moyens d'ancrage est formé par des découpes dans lesdites parois transversales, de sorte que les languettes flexibles s'encastrent dans les découpes des plaques conductrices extérieures.The two holding plates of the heating body may comprise transverse walls having a U-shape at least on their two ends, each of the anchoring means is formed by cuts in said transverse walls, so that the flexible tongues fit together. in the cutouts of the outer conductive plates.

Les moyens de réception peuvent comporter des languettes flexibles aménagées dans lesdits rails en forme de U.The receiving means may comprise flexible tabs arranged in said U-shaped rails.

Les deux plaques de maintien du corps chauffant peuvent comporter des parois transversales présentant une forme en U au moins sur leurs deux extrémités.The two holding plates of the heating body may have transverse walls having a U-shape at least on both ends.

Les deux plaques conductrices extérieures sont en forme de U sur toutes leurs longueurs.The two outer conductive plates are U-shaped in all their lengths.

Selon un autre mode particulier de invention, chacun des moyens d'ancrage est formé par un évidemment dans le plan de chacune desdites plaques de maintien présentant la forme en U sur au moins leurs deux extrémités, et les languettes flexibles sont formées sur les parois latérales des rails en forme de U, de sorte que lesdites languettes flexibles s'encastrent dans les évidements des plaques de maintien.According to another particular embodiment of the invention, each of the anchoring means is formed by a recess in the plane of each of said holding plates having the U-shape on at least their two ends, and the tongues hoses are formed on the side walls of the U-shaped rails, so that said flexible tabs fit into the recesses of the holding plates.

Selon une variante, chacun des moyens d'ancrage est formé par des découpes dans les parois transversales desdites plaques de maintien présentant la forme en U sur au moins leurs deux extrémités, et les languettes flexibles sont formées dans les branches du U des rails, de sorte que les languettes flexibles s'encastrent dans les découpes des plaques de maintien.According to a variant, each of the anchoring means is formed by cuts in the transverse walls of said U-shaped holding plates on at least their two ends, and the flexible tongues are formed in the U-branches of the rails, so that the flexible tabs are embedded in the cutouts of the holding plates.

Avantageusement, chacun des rails en forme de U comporte sur sa paroi latérale une lamelle souple assurant un calage précis des plaques de maintien évitant ainsi tout problème lié à la dispersion géométrique du corps chauffant.Advantageously, each of the U-shaped rails has on its side wall a flexible blade ensuring accurate setting of the holding plates thus avoiding any problem related to the geometric dispersion of the heating body.

Selon un autre aspect de l'invention, les moyens d'ancrage des deux plaques de maintien comportent des pattes destinées à être pliées sur les moyens de réception associés intégrés dans les embases avant et arrière.According to another aspect of the invention, the anchoring means of the two holding plates comprise tabs intended to be folded on the associated receiving means integrated in the front and rear bases.

Chacun des moyens de réception peut comporter des enfoncements dans les parties supérieure et inférieure des embases avant et arrière, de sorte que lesdites pattes desdites plaques de maintien se plient dans les enfoncements respectifs.Each of the receiving means may comprise depressions in the upper and lower portions of the front and rear bases, so that said tabs of said holding plates bend in the respective recesses.

Selon un aspect particulier de l'invention, les boîtiers rectangulaires des embases avant et arrière présentent sur leurs côtés latéraux des rails en forme de U et chacun des moyens de réception comporte des ergots formés sur ces rails, de sorte que lesdites pattes desdites plaques de maintien se plient sur les rails juste à l'extérieur des ergots.According to a particular aspect of the invention, the rectangular housings of the front and rear bases have on their lateral sides U-shaped rails and each of the reception means comprises lugs formed on these rails, so that said lugs of said plates keep bending on the rails just outside the lugs.

Les deux plaques de maintien peuvent présenter une forme de U sur toutes leurs longueurs entre les ergots et s'adaptent sur les rails des embases avant et arrière.The two holding plates can have a U-shape in all their lengths between the lugs and fit on the rails of the front and rear bases.

Avantageusement, chacun des rails en forme de U comporte sur sa paroi latérale une lamelle souple assurant un calage précis des plaques de maintien évitant ainsi tout problème lié à la dispersion géométrique du corps chauffant.Advantageously, each of the U-shaped rails has on its side wall a flexible blade ensuring accurate setting of the holding plates thus avoiding any problem related to the geometric dispersion of the heating body.

Selon un aspect de l'invention, tous les éléments du corps chauffant sont fixés entre eux par collage, à l'exception des deux plaques de maintien.According to one aspect of the invention, all the elements of the heating body are fixed together by gluing, with the exception of the two holding plates.

Selon un autre aspect de l'invention, tous les éléments du corps chauffant sont fixés entre eux par collage, y compris les deux plaques de maintiens.According to another aspect of the invention, all the elements of the heating body are fixed together by gluing, including the two support plates.

Avantageusement, les plaques conductrices présentent des plis aux extrémités du corps chauffant afin que les bornes de raccordement aient un pas standard.Advantageously, the conductive plates have folds at the ends of the heating body so that the connection terminals have a standard pitch.

La ou les plaques de maintien peuvent former aussi une ou des plaques conductrices.The one or more holding plates can also form one or more conductive plates.

Les embases avant et arrière peuvent être en matière plastique.The front and rear bases can be made of plastic.

Brève description des dessinsBrief description of the drawings

  • La figure 1 ne faisant par partie de l'invention est une vue schématique d'un dispositif de chauffage électrique.The figure 1 Part of the invention is a schematic view of an electric heater.
  • La figure 2A ne faisant par partie de l'invention est une vue en perspective d'un mode de réalisation.The Figure 2A Embodiments of the invention are a perspective view of an embodiment.
  • La figures 2B est une vue en perspective d'une embase arrière du dispositif de la figure 2A .The Figures 2B is a perspective view of a rear base of the device of the Figure 2A .
  • La figure 3 ne faisant par partie de l'invention est une variante de la figure 1 montrant une vue schématique d'un dispositif de chauffage électrique comportant deux plaques de maintien.The figure 3 not forming part of the invention is a variant of the figure 1 showing a schematic view of an electric heater comprising two holding plates.
  • La figure 4A ne faisant par partie de l'invention est une vue en perspective d'un autre mode de réalisation.The Figure 4A Embodiments of the invention are a perspective view of another embodiment.
  • Les figures 4B et 4C ne faisant par partie de l'invention sont des vues en perspective des embases avant et arrière du dispositif de la figure 4A.The Figures 4B and 4C not part of the invention are perspective views of the front and rear bases of the device of the Figure 4A .
  • Les figures 4D et 4E ne faisant par partie de l'invention sont des vues en perspective avec coupes partielles illustrant les montages aux niveaux des embases avant et arrière du dispositif de la figure 4A.The Figures 4D and 4E Embodiments of the invention are perspective views with partial sections illustrating the mountings at the front and rear bases of the device of the invention. Figure 4A .
  • La figure 5 ne faisant par partie de l'invention illustre une variante du dispositif de chauffage de la figure 4A.The figure 5 not part of the invention illustrates a variant of the heating device of the Figure 4A .
  • La figure 6A ne faisant par partie de l'invention est une vue en perspective d'un mode de réalisation ; tandis que les figures 6B et 6D sont des vues en perspective des embases avant et arrière du dispositif de la figure 6A ; et que la figure 6C est une vue en perspective avec coupe partielle illustrant le montage au niveau de l'embase avant du dispositif de la figure 6A.The Figure 6A not part of the invention is a perspective view of an embodiment; while the Figures 6B and 6D are perspective views of the front and rear sockets of the device of the Figure 6A ; and that Figure 6C is a perspective view with partial section illustrating the mounting at the front base of the device of the Figure 6A .

D'autres particularités et avantages de l'invention ressortiront à la lecture de la description faite, ci-après, à titre indicatif mais non limitatif, en référence aux dessins annexés, sur lesquels :

  • la figure 7A est une vue en perspective d'un premier mode de réalisation selon l'invention ;
  • la figure 7B est une vue en perspective de l'embase avant du dispositif de la figure 7A ;
  • la figure 7C est une vue en perspective avec coupe partielle illustrant le montage au niveau de l'embase avant du dispositif de la figure 7A;
  • la figure 8A illustre une variante du dispositif de chauffage de la figure 7A ;
  • la figure 8B est une vue en perspective de l'embase avant du dispositif de la figure 8A ;
  • la figure 8C est une vue en perspective avec coupe partielle illustrant le montage au niveau de l'embase avant du dispositif de la figure 8A ;
  • la figure 9A est une vue en perspective d'un deuxième mode de réalisation selon l'invention ;
  • les figures 9B et 9C sont des vues en perspective avec coupes partielles illustrant le montage au niveau des embases avant et arrière du dispositif de la figure 9A ;
  • la figure 10A illustre une variante du dispositif de chauffage de la figure 9A ; et
  • les figures 10B et 10C sont des vues en perspective des embases avant et arrière du dispositif de la figure 10A.
Other features and advantages of the invention will appear on reading the description given below, by way of indication but not limitation, with reference to the accompanying drawings, in which:
  • the Figure 7A is a perspective view of a first embodiment according to the invention;
  • the Figure 7B is a perspective view of the front base of the device of the Figure 7A ;
  • the Figure 7C is a perspective view with partial section illustrating the mounting at the front base of the device of the Figure 7A ;
  • the figure 8A illustrates a variant of the heating device of the Figure 7A ;
  • the Figure 8B is a perspective view of the front base of the device of the figure 8A ;
  • the Figure 8C is a perspective view with partial section illustrating the mounting at the front base of the device of the figure 8A ;
  • the Figure 9A is a perspective view of a second embodiment according to the invention;
  • the Figures 9B and 9C are perspective views with partial sections illustrating the mounting at the front and rear bases of the device of the Figure 9A ;
  • the figure 10A illustrates a variant of the heating device of the Figure 9A ; and
  • the Figures 10B and 10C are perspective views of the front and rear sockets of the device of the figure 10A .

Description détaillée de modes de réalisationDetailed description of embodiments

La figure 1 montre schématiquement un dispositif de chauffage non revendiqué destiné par exemple à une installation de climatisation de véhicule automobile.The figure 1 shows schematically an unclaimed heating device for example for a motor vehicle air conditioning installation.

Le dispositif de chauffage 1 comprend un corps chauffant 3 comportant une pluralité de plaques conductrices 4 entre lesquelles sont montés des éléments résistifs 7 chauffants et des éléments radiants 9.The heating device 1 comprises a heating body 3 comprising a plurality of conductive plates 4 between which resistive heating elements 7 and radiant elements 9 are mounted.

Les éléments résistifs 7 peuvent être des résistances à coefficient de température positif (CTP) qui se présentent habituellement sous forme de blocs ou pierres. Ces éléments, du fait de la forte augmentation de leur résistance électrique à partir d'un seuil de température (point de Curie), confèrent au dispositif de chauffage la capacité de s'autoréguler en fonction de la température, ce qui évite tout échauffement excessif potentiellement dangereux.The resistive elements 7 may be positive temperature coefficient (PTC) resistors which are usually in the form of blocks or stones. These elements, because of the strong increase in their electrical resistance from a temperature threshold (Curie point), give the heating device the ability to self-regulate as a function of temperature, which avoids any excessive heating. potentially dangerous.

Les éléments radiants 9 sont des bandes métalliques ondulées, par exemple en acier ou en aluminium qui s'étendent entre les plaques 4, le long de celles-ci, et permettent d'augmenter la surface d'échange thermique avec un flux d'air traversant le dispositif de chauffage 1 perpendiculairement au plan du corps chauffant 3.The radiant elements 9 are corrugated metal strips, for example made of steel or aluminum, which extend between the plates 4, along them, and make it possible to increase the heat exchange surface with a flow of air passing through the heating device 1 perpendicular to the plane of the heating body 3.

La figure 1 montre que les éléments résistifs 7 sont disposés en rangées, dont chacune comporte une pluralité d'éléments résistifs 7 espacés les uns des autres le long du corps chauffant 3. Un côté de chaque élément résistif 7 est en contact avec une plaque conductrice 4, tandis que l'autre côté de chaque élément résistif 7 est en contact avec un élément radiant 9. A son tour, l'élément radiant 9 est disposé le long d'une autre plaque conductrice 4.The figure 1 shows that the resistive elements 7 are arranged in rows, each of which has a plurality of resistive elements 7 spaced apart from each other along the heating body 3. One side of each resistive element 7 is in contact with a conductive plate 4, while the other side of each resistive element 7 is in contact with a radiating element 9. In turn, the radiant element 9 is disposed along another conductive plate 4.

A titre d'exemple, la figure 1 illustre quatre plaques conductrices 4, une plaque de maintien 5 sensiblement au milieu du corps chauffant 3, deux rangées d'élément résistif 7, et quatre rangées d'élément radiant 9. Mais bien évidemment ces nombres peuvent être quelconques, et notamment on peut envisager que le corps chauffant comporte deux plaques de maintien disposées sur chacun des deux cotés latéraux externes de ce corps comme il sera décrit plus avant au regard de la figure 3.For example, the figure 1 illustrates four conductive plates 4, a holding plate 5 substantially in the middle of the heating body 3, two rows of resistive element 7, and four rows of radiant element 9. But obviously these numbers can be any, and in particular we can consider that the heating body comprises two holding plates disposed on each of the two outer lateral sides of this body as will be described further with regard to the figure 3 .

Ainsi, pour une rangée d'éléments résistifs 7, un côté de ces éléments résistifs 7 peut être en contact électrique direct avec une plaque conductrice 4 tandis que l'autre côté des éléments résistifs 7 peut être en contact électrique avec la plaque conductrice 4 adjacente au travers de l'élément radiant 9 disposé entre les deux plaques conductrices. Par conséquent, les éléments résistifs 7 disposés dans une rangée peuvent être alimentés en parallèle entre deux plaques conductrices 4 consécutives.Thus, for a row of resistive elements 7, one side of these resistive elements 7 may be in direct electrical contact with a conductive plate 4 while the other side of the resistive elements 7 may be in electrical contact with the adjacent conductive plate 4 through the radiant element 9 disposed between the two conductive plates. Therefore, the resistive elements 7 arranged in a row can be fed in parallel between two consecutive conductive plates 4.

Bien évidemment, le corps chauffant peut comporter une toute autre configuration connue dans l'art antérieur. Par exemple, les éléments résistifs peuvent être disposés dans des barreaux. Chaque barreau comprend une pluralité d'éléments résistifs espacés les uns des autres et alimentés en parallèle entre deux plaques conductrices.Of course, the heating body may comprise any other configuration known in the prior art. For example, the resistive elements may be arranged in bars. Each bar comprises a plurality of resistive elements spaced from each other and fed in parallel between two conductive plates.

Par ailleurs, tous les éléments constitutifs du corps chauffant 3 peuvent être maintenus entre eux par collage ou par d'autres types d'assemblage.Moreover, all the constituent elements of the heating body 3 can be held together by gluing or by other types of assembly.

Le corps chauffant 3 est disposé entre une embase avant 11 et une embase arrière 13. Ces embases peuvent par exemple avoir une forme de boîtiers rectangulaires adaptés pour accueillir les extrémités avant et arrière du corps chauffant 3.The heating body 3 is disposed between a front base 11 and a rear base 13. These bases may for example be in the form of rectangular housings adapted to receive the front and rear ends of the heating body 3.

Bien évidemment, les embases avant 11 et arrière 13 sont en matière électriquement isolante, par exemple, en matière plastique.Of course, the front 11 and rear 13 bases are electrically insulating material, for example, plastic.

En revanche, la plaque de maintien 5 peut former une plaque conductrice, mais elle peut aussi être isolante.On the other hand, the holding plate 5 can form a conductive plate, but it can also be insulating.

Au moins une partie des plaques conductrices 4 font saillie à l'embase avant 11 pour former des bornes 15 de raccordement à un circuit d'alimentation électrique non représenté.At least a portion of the conductive plates 4 protrude from the front base 11 to form terminals 15 for connection to a power supply circuit not shown.

En outre, la plaque de maintien 5 du corps chauffant 3 comporte à ses extrémités des moyens d'ancrage 17 coopérant avec des moyens de réception associés 19 intégrés dans les embases avant 11 et arrière 13. Ceci permet de maintenir fixement le corps chauffant 3 entre ces embases avant 11 et arrière 13.In addition, the holding plate 5 of the heating body 3 comprises at its ends anchoring means 17 cooperating with associated receiving means 19 integrated in the front 11 and rear 13 bases. This allows to fix the heating body 3 between these bases before 11 and rear 13.

Les moyens d'ancrage 17 peuvent coopérer avec les moyens de réception associés 19 par clippage. Par exemple, les extrémités de la plaque de maintien 5 peut avoir la forme d'un harpon permettant ainsi l'ancrage de cette plaque de maintien dans les embases avant 11 et arrière 13. Une fois ancré, le harpon interdit tout déplacement.The anchoring means 17 can cooperate with the associated receiving means 19 by clipping. For example, the ends of the holding plate 5 may be in the form of a harpoon thus allowing the anchoring of this holding plate in the front 11 and rear bases 13. Once anchored, the harpoon prohibits any movement.

On notera que, tous les éléments du corps chauffant 3 peuvent être fixés entre eux, par exemple par collage.It will be noted that all the elements of the heating body 3 can be fixed together, for example by gluing.

Les figures 2A et 2B illustrent un premier mode de réalisation non revendiqué d'un dispositif de chauffage 1 comprenant un corps chauffant 3 comportant une pluralité de plaques conductrices 4 entre lesquelles sont montés des éléments résistifs chauffant (non représentés) et des éléments radiants 9 dont seulement une partie est représentée.The Figures 2A and 2B illustrate a first, unclaimed embodiment of a heater 1 comprising a heater 3 having a plurality of conductive plates 4 between which heating resistive elements (not shown) and radiant elements 9 of which only a portion are shown .

Seule une vue en perspective de l'embase arrière est représentée sur la figure 2B, sachant que le mécanisme de montage est identique pour l'embase avant.Only a perspective view of the rear base is shown on the Figure 2B , knowing that the mounting mechanism is identical for the front base.

Le corps chauffant 3 est disposé entre une embase avant 11 et une embase arrière 13. Ces embases avant 11 et arrière 13 ont une forme de boîtiers rectangulaires adaptés pour recevoir les extrémités avant et arrière du corps chauffant 3. L'embase avant 11 comporte en outre, un logement 21 à l'intérieur duquel sont disposés les bornes 15 de raccordement (voir figure 1), formant ainsi un connecteur permettant de raccorder le corps chauffant 3 à un circuit électrique de puissance alimenté par exemple par la batterie du véhicule.The heating body 3 is disposed between a front base 11 and a rear base 13. These front 11 and rear 13 bases have the form of rectangular housings adapted to receive the front and rear ends of the heating body 3. The front base 11 comprises in in addition, a housing 21 inside which are arranged the connection terminals 15 (see figure 1 ), thereby forming a connector for connecting the heating body 3 to an electric power circuit powered for example by the vehicle battery.

Les embases avant 11 et arrière 13 comportent des moyens de réception 19 destinés à coopérer avec des moyens d'ancrage 17 disposés aux extrémités d'une plaque de maintien 5 du corps chauffant 3.The front 11 and rear 13 bases comprise receiving means 19 intended to cooperate with anchoring means 17 arranged at the ends of a holding plate 5 of the heating body 3.

Ces moyens de réception 19 comportent des languettes flexibles 125 aménagées dans les parties supérieure et inférieure des embases avant 11 et arrière 13. Chacune des embases comporte au moins une languette flexible. Selon cet exemple, chacune comporte deux languettes flexibles 125, sensiblement au milieu de l'embase.These receiving means 19 comprise flexible tabs 125 arranged in the upper and lower portions of the front 11 and rear 13 bases. Each of the bases comprises at least one flexible tongue. According to this example, each has two flexible tabs 125, substantially in the middle of the base.

La coupe partielle de la figure 2B, montre que la plaque de maintien 5 du corps chauffant 3 comporte des parois transversales 37 leur donnant une forme en U au moins à ses deux extrémités. Cet exemple montre que hormis ses extrémités, la plaque de maintien 5 est en forme d'équerre.The partial section of the Figure 2B , shows that the holding plate 5 of the heating body 3 has transverse walls 37 giving them a U-shape at least at both ends. This example shows that except for its ends, the holding plate 5 is square.

Par ailleurs, chacun des moyens d'ancrage 17 est formé par des découpes 39 dans lesdites parois transversales 37, de sorte que les languettes flexibles 125 se clippent ou s'encastrent dans ces découpes 39 de la plaque de maintien 5.Moreover, each of the anchoring means 17 is formed by cutouts 39 in said transverse walls 37, so that the flexible tongues 125 are clipped or fit into these cutouts 39 of the holding plate 5.

D'autres moyens d'ancrage et de réception sont envisageables comme il est décrit plus loin dans des exemples d'un dispositif de chauffage avec plus d'une plaque de maintien.Other means of anchoring and receiving are possible as described below in examples of a heating device with more than one holding plate.

La figure 3 est une variante de la figure 1 montrant schématiquement un dispositif de chauffage dont le corps chauffant 3 comporte deux plaques de maintien 5a et 5b disposées sur chacun des deux côtés latéraux extérieurs du corps chauffant 3.The figure 3 is a variant of the figure 1 schematically showing a heating device whose heating body 3 comprises two holding plates 5a and 5b disposed on each of the two outer lateral sides of the heating body 3.

A titre d'exemple, la figure 3 illustre trois plaques conductrices 4, deux plaques de maintien 5a et 5b, deux rangées d'élément résistif 7, et quatre rangées d'élément radiant 9 mais bien évidemment ces nombres peuvent être quelconques.For example, the figure 3 illustrates three conductive plates 4, two holding plates 5a and 5b, two rows of resistive element 7, and four rows of radiant element 9 but obviously these numbers can be arbitrary.

Les plaques de maintien 5a et 5b peuvent former aussi des plaques conductrices.The holding plates 5a and 5b can also form conductive plates.

Par ailleurs, tous les éléments constitutifs du corps chauffant 3 peuvent être maintenus entre eux par collage ou par d'autres types d'assemblage.Moreover, all the constituent elements of the heating body 3 can be held together by gluing or by other types of assembly.

En outre, les deux plaques de maintien 5a et 5b du corps chauffant 3 comportent chacune à leurs deux extrémités des moyens d'ancrage 17 coopérant avec des moyens de réception associés 19 intégrés dans les embases avant 11 et arrière 13. Ceci permet de maintenir fixement le corps chauffant 3 entre ces embases avant 11 et arrière 13.In addition, the two holding plates 5a and 5b of the heating body 3 each comprise at their two ends anchoring means 17 cooperating with associated receiving means 19 integrated in the front plates 11 and rear 13. This allows to maintain fixedly the heating body 3 between these bases before 11 and rear 13.

Les moyens d'ancrage 17 peuvent coopérer avec les moyens de réception associés 19 par clippage. Par exemple, les extrémités des deux plaques de maintien Sa et 5b peuvent avoir la forme d'un harpon permettant ainsi l'ancrage de ces plaques conductrices extérieures dans les embases avant 11 et arrière 13. Une fois ancré, le harpon interdit tout déplacement.The anchoring means 17 can cooperate with the associated receiving means 19 by clipping. For example, the ends of the two holding plates Sa and 5b may have the shape of a harpoon thus allowing the anchoring of these outer conductive plates in the front 11 and rear bases 13. Once anchored, the harpoon prohibits any movement.

En variante, les moyens d'ancrage 17 des deux plaques de maintien 5a et 5b peuvent comporter des pattes destinées à être pliées sur les moyens de réception associés 19 intégrés dans les embases avant 11 et arrière 13.In a variant, the anchoring means 17 of the two holding plates 5a and 5b may comprise lugs intended to be folded on the associated receiving means 19 integrated in the front 11 and rear 13 bases.

On notera que, tous les éléments du corps chauffant 3 peuvent être fixés entre eux, par exemple par collage, à l'exception des deux plaques de maintien extérieures 5a et 5b. Dans ce cas, les deux plaques de maintien extérieures 5a et 5b peuvent ne pas faire partie du corps chauffant 3 en tant que tel, et leurs ancrages dans les embases avant 11 et arrière 13 est suffisant pour maintenir fixement le corps chauffant 3 entre ces embases avant 11 et arrière 13.It will be noted that all the elements of the heating body 3 can be fixed to each other, for example by gluing, with the exception of the two outer holding plates 5a and 5b. In this case, the two outer holding plates 5a and 5b may not be part of the heating body 3 as such, and their anchors in the front 11 and rear 13 bases is sufficient to firmly hold the heating body 3 between these bases before 11 and back 13.

Il est aussi envisageable que tous les éléments du corps chauffant 3 soient fixés entre eux, par exemple par collage, y compris les deux plaques de maintiens 5a et 5b. Dans ce cas, ces deux plaques de maintien font partie intégrante du corps chauffant 3 et peuvent être disposées à l'intérieur du corps chauffant.It is also conceivable that all the elements of the heating body 3 are fixed together, for example by gluing, including the two support plates 5a and 5b. In this case, these two holding plates are an integral part of the heating body 3 and can be arranged inside the heating body.

Les figures 4A à 8C, illustrent plusieurs modes de réalisation d'un dispositif de chauffage comprenant un corps chauffant maintenu entre des embases avant et arrière par clippage.The Figures 4A to 8C , illustrate several embodiments of a heating device comprising a heating body held between the front and rear bases by clipping.

Les figures 4A à 4E illustrent un premier mode de réalisation non revendiqué d'un dispositif de chauffage 1 comprenant un corps chauffant 3 comportant une pluralité de plaques conductrices 5 entre lesquelles sont montés des éléments résistifs chauffant (non représentés), deux plaques de maintien 5a1 et 5b1, et des éléments radiants 9 dont seulement une partie est représentée.The FIGS. 4A to 4E illustrate a first, unclaimed embodiment of a heater 1 comprising a heater 3 having a plurality of conductive plates 5 between which heating resistive elements (not shown), two holding plates 5a1 and 5b1, and radiant elements 9 of which only a part is represented.

Le corps chauffant 3 est disposé entre une embase avant 11 et une embase arrière 13. Ces embases avant 11 et arrière 13 ont une forme de boîtiers rectangulaires adaptés pour recevoir les extrémités avant et arrière du corps chauffant 3. L'embase avant 11 comporte en outre, un logement 21 à l'intérieur duquel sont disposés les bornes 15 de raccordement (voir figure 1), formant ainsi un connecteur permettant de raccorder le corps chauffant 3 à un circuit électrique de puissance alimenté par exemple par la batterie du véhicule.The heating body 3 is disposed between a front base 11 and a rear base 13. These front 11 and rear 13 bases have the form of rectangular housings adapted to receive the front and rear ends of the heating body 3. The front base 11 comprises in in addition, a housing 21 inside which are arranged the connection terminals 15 (see figure 1 ), thereby forming a connector for connecting the heating body 3 to an electric power circuit powered for example by the vehicle battery.

En effet, la figure 4B illustre une vue en perspective de l'embase avant 11 montrant des ouvertures 23 aux travers desquelles sont introduits, au moins une partie des plaques conductrices pour former les bornes de raccordement.Indeed, the Figure 4B illustrates a perspective view of the front base 11 showing openings 23 through which are introduced, at least a portion of the conductive plates to form the connection terminals.

Les embases avant 11 et arrière 13 comportent des moyens de réception 19 destinés à coopérer avec des moyens d'ancrage 17 disposés aux extrémités des deux plaques de maintien 5a1 et 5b1 du corps chauffant 3.The front 11 and rear 13 bases comprise receiving means 19 intended to cooperate with anchoring means 17 arranged at the ends of the two holding plates 5a1 and 5b1 of the heating body 3.

Ces moyens de réception 19 comportent des languettes flexibles 25 aménagées dans les parties supérieure et inférieure des embases avant 11 et arrière 13. Chacune des embases comporte au moins une languette flexible. Selon cet exemple, chacune comporte quatre languettes flexibles 25, par exemple une dans chaque coin, et chaque languette comporte une lumière 27.These receiving means 19 comprise flexible tongues 25 arranged in the upper and lower portions of the front 11 and rear 13 bases. Each of the bases comprises at least one flexible tongue. According to this example, each has four flexible tabs 25, for example one in each corner, and each tab has a light 27.

Les figures 4D et 4E sont des vues en perspective avec coupes partielles illustrant les montages aux niveaux des embases avant et arrière du dispositif de la figure 4A. Ces figures montrent que chacun des moyens d'ancrage 17 des deux plaques de maintien 5a1 et 5b1 comporte, dans les plans de ces plaques de maintien, des crochets 29 opposés, formant une sorte de harpon permettant ainsi à ces crochets 29 de se clipper ou de s'encastrer dans les lumières 27 des languettes flexibles 25 afin de maintenir fixement le corps chauffant 3 entre les embases avant 11 et arrière 13. Au surplus, ces harpons ont pour fonction complémentaire une limitation du jeu entre les deux embases.The Figures 4D and 4E are perspective views with partial sections illustrating the mountings at the levels of the front and rear bases of the device of the Figure 4A . These figures show that each of the anchoring means 17 of the two holding plates 5a1 and 5b1 comprises, in the planes of these holding plates, opposite hooks 29, forming a kind of harpoon thus allowing these hooks 29 to be clipped or to fit into the slots 27 of the flexible tongues 25 in order to fix the heating body 3 between the front 11 and rear 13 bases. In addition, these harpoons have the additional function of limiting the clearance between the two bases.

Par ailleurs les figures 4B et 4C montrent que les embases avant 11 et arrière 13 peuvent avantageusement comporter des premières fentes 31 destinées à accueillir les extrémités d'une des deux plaques de maintien (par exemple la plaque 5b1) et des secondes fentes 33 destinées à accueillir les extrémités de l'autre plaque de maintien 5a1. Les premières 31 et secondes 33 fentes assurent ainsi un ajustement correct des plaques de maintien 5b1 et 5a1 respectivement. Ces fentes assurent donc un guidage pour que les harpons tombent dans les trous 27.Moreover, Figures 4B and 4C show that the front 11 and rear 13 bases may advantageously comprise first slots 31 for receiving the ends of one of the two holding plates (for example the plate 5b1) and second slots 33 for receiving the ends of the other holding plate 5a1. The first 31 and second 33 slots thus ensure a correct adjustment of the holding plates 5b1 and 5a1 respectively. These slots thus provide guidance for the harpoons to fall into the holes 27.

En particulier, les premières fentes 31 assurent un calage précis de la plaque de maintien 5b1 qu'elles accueillent, et les secondes fentes 33 comportent un jeu suffisant pour accueillir ladite autre plaque de maintien 5a1 évitant ainsi tout problème lié à la dispersion géométrique, c'est-à-dire aux tolérances de fabrication, du corps chauffant 3 collé. Ainsi, le montage du corps chauffant 3 dans les embases avant 11 et arrière 13 est réalisé avec précision et simplicité.In particular, the first slots 31 provide a precise wedging of the holding plate 5b1 they host, and the second slots 33 have a clearance sufficient to accommodate said other holding plate 5a1 thus avoiding any problem related to the geometric dispersion, c that is, the manufacturing tolerances of the glued heating body 3. Thus, the mounting of the heating body 3 in the front 11 and rear 13 bases is made accurately and simplicity.

D'une manière générale, le pas entre les bornes 15 de raccordement est standard. Par conséquent, les plaques conductrices 4 peuvent comporter des plis 35 aux extrémités du corps chauffant 3 afin de respecter le pas standard entre les bornes de raccordement.In general, the pitch between the connection terminals 15 is standard. Therefore, the conductive plates 4 may have folds 35 at the ends of the heating body 3 in order to respect the standard pitch between the connection terminals.

Par ailleurs, ces plis 35 ont d'autres fonctions. Ils permettent de maintenir les éléments radiants 9 dans le corps chauffant 3, par exemple pendant le processus de collage. Ils ont aussi une fonction de butée, définissant parfaitement la longueur qui sépare les deux embases (voir figure 5C).Moreover, these folds 35 have other functions. They make it possible to maintain the radiant elements 9 in the heating body 3, for example during the gluing process. They also have a stop function, defining perfectly the length which separates the two bases (see Figure 5C ).

Par ailleurs, lorsque le pas entre les plaques conductrices 4 et identique à celui entre les bornes 15 de raccordement, il est toujours avantageux que ces plaques conductrices 4 présentent des plis ou volets pour bien caler les éléments radiants 9 (voir figure 7C).Furthermore, when the pitch between the conductive plates 4 and identical to that between the connection terminals 15, it is always advantageous for these conductive plates 4 to have folds or flaps to wedge the radiant elements 9 (see FIG. Figure 7C ).

A titre d'exemple, la figure 4A montre que le corps chauffant 3 comporte cinq rangées d'éléments radiants 9 et que ces deux plaques de maintien 5a1 et 5b1 sont en forme d'équerre.For example, the Figure 4A shows that the heating body 3 has five rows of radiant elements 9 and that these two holding plates 5a1 and 5b1 are square-shaped.

La figure 5 est une variante du dispositif de chauffage illustré dans la figure 4A. Selon cette variante, les deux plaques de maintien 5a2 et 5b2 sont en forme de U sur toutes leurs longueurs.The figure 5 is a variant of the heater shown in the Figure 4A . According to this variant, the two holding plates 5a2 and 5b2 are U-shaped in all their lengths.

La figure 6A est une vue en perspective d'un autre mode de réalisation non revendiqué. Selon ce mode, voir aussi les figures 6B et 6D, les moyens de réception sont comme précédemment, des languettes flexibles 125 aménagées dans les parties supérieure et inférieure des embases avant 11 et arrière 13.The Figure 6A is a perspective view of another unclaimed embodiment. According to this mode, see also Figures 6B and 6D , the receiving means are as before, flexible tabs 125 arranged in the upper and lower portions of the front 11 and rear 13 bases.

En revanche, comme il est montré dans la coupe partielle de la figure 6C, les deux plaques de maintien 5a3 et 5b3 du corps chauffant 3 comportent des parois transversales 37 leur donnant une forme en U au moins à leurs deux extrémités. Par ailleurs, chacun des moyens d'ancrage 17 est formé par des découpes 39 dans lesdites parois transversales 37, de sorte que les languettes flexibles 125 se clippent ou s'encastrent dans ces découpes 39 des plaques de maintien 5a3 et 5b3.On the other hand, as it is shown in the partial section of the Figure 6C the two holding plates 5a3 and 5b3 of the heating body 3 comprise walls transverse 37 giving them a U-shape at least at both ends. Furthermore, each of the anchoring means 17 is formed by cutouts 39 in said transverse walls 37, so that the flexible tabs 125 are clipped or fit into these cutouts 39 of the holding plates 5a3 and 5b3.

La figure 6A montre que hormis leurs extrémités, les plaques de maintien 5a3 et 5b3 sont en forme d'équerre. Il est aussi envisageable qu'ils soient en forme de U sur toutes leurs longueurs.The Figure 6A shows that except for their ends, the holding plates 5a3 and 5b3 are square-shaped. It is also possible that they are U-shaped in all their lengths.

Les figures 7A à 8C illustrent des modes de réalisation d'un dispositif de chauffage 1 selon l'invention. Selon ces modes, les boîtiers rectangulaires des embases avant 11 et arrière 13 présentent sur leurs côtés latéraux des rails 41 débordant des embases, par exemple en forme de U.The Figures 7A to 8C illustrate embodiments of a heating device 1 according to the invention. According to these modes, the rectangular housings of the front 11 and rear 13 bases have on their lateral sides rails 41 projecting from the bases, for example U-shaped.

Seules des vues en perspectives des embases avants sont représentées sur les figures 9B et 10B, sachant que le mécanisme de montage est identique pour les embases arrières. Ces figures montrent que les deux plaques de maintien 5a4, 5b4, 5a5 et 5b5 sont en forme de U sur toutes leurs longueurs permettant ainsi de bien coopérer avec les rails 41 correspondantes des embases avant 11 et arrière 13.Only perspective views of the front bases are represented on the Figures 9B and 10B , knowing that the mounting mechanism is identical for the rear bases. These figures show that the two holding plates 5a4, 5b4, 5a5 and 5b5 are U-shaped in all their lengths, thus making it possible to cooperate well with the corresponding rails 41 of the front 11 and rear 13 bases.

Il est également envisageable que les deux plaques de maintien 5a4, 5b4, 5a5 et 5b5 du corps chauffant comportent des parois présentant une forme en U uniquement sur leurs deux extrémités et à hauteur des rails 41 des embases avant 11 et arrière 13.It is also conceivable that the two holding plates 5a4, 5b4, 5a5 and 5b5 of the heating body comprise walls having a U-shape only on their two ends and at the height of the rails 41 of the front 11 and rear 13 bases.

Par ailleurs, les figures 7A à 8C, montrent que les moyens de réception comportent des languettes flexibles 225, 325 aménagées dans les rails 41 des embases avant 11 et arrière 13.Moreover, Figures 7A to 8C , show that the receiving means comprise flexible tongues 225, 325 arranged in the rails 41 of the front 11 and rear 13 bases.

Selon le mode de réalisation des figures 7A à 7C, les languettes flexibles 225 sont formées sur les parois latérales des rails 41 des embases.According to the embodiment of Figures 7A to 7C , the flexible tabs 225 are formed on the side walls of the rails 41 of the bases.

En outre, chacun des moyens d'ancrage 17 est formé par un évidement 43 à l'extrémité et dans le plan de chacune des plaques de maintien 5a4 et 5b4. Ainsi, lors du montage du corps chauffant 3, les languettes flexibles 225 se clippent ou s'encastrent dans les évidements 43 des plaques de maintien 5a4 et 5b4.In addition, each of the anchoring means 17 is formed by a recess 43 at the end and in the plane of each of the holding plates 5a4 and 5b4. Thus, during assembly of the heating body 3, the flexible tongues 225 cluck or fit into the recesses 43 of the holding plates 5a4 and 5b4.

Par ailleurs, la figure 7C montre que la plaque de maintien 5a4 est une plaque conductrice présentant un plis 135 afin de respecter un pas standard entre les bornes 15 de raccordement mais aussi pour retenir les éléments radiants 9. Lorsque le pas entre les plaques conductrices 4 est identique à celui entre les bornes 15 de raccordement, ces plaques conductrices 4 présentent des plis ou volets 35 permettant de caler les éléments radiants 9 qui ne sont pas représentés dans les figures 7A et 7C pour plus de clarté.Moreover, the Figure 7C shows that the holding plate 5a4 is a conductive plate having a fold 135 in order to respect a standard pitch between the connection terminals 15 but also to retain the radiating elements 9. When the pitch between the conductive plates 4 is identical to that between the terminals 15 connection, these conductive plates 4 have folds or flaps 35 for wedging the radiant elements 9 which are not represented in the Figures 7A and 7C to clarify more.

Dans la variante des figures 8A à 8C, les languettes flexibles 325 sont formées dans les parties supérieure et inférieure des rails 41 en forme de U des embases avant 11 et arrière 13.In the variant of Figures 8A to 8C , the flexible tongues 325 are formed in the upper and lower portions of the U-shaped rails 41 of the front 11 and rear 13 bases.

Dans ce cas, chacun des moyens d'ancrage est formé par des découpes 45 dans les parois transversales des plaques de maintien 5a5 et 5b5, de sorte que les languettes flexibles 325 se clippent ou s'encastrent dans ces découpes 45 lors du montage du corps chauffant 3 entre les embases avant 11 et arrière 13.In this case, each of the anchoring means is formed by cutouts 45 in the transverse walls of the holding plates 5a5 and 5b5, so that the flexible tongues 325 are clipped or fit into these cutouts 45 during assembly of the body heating 3 between the front 11 and rear 13 bases.

En outre, chacun des rails 41 en forme de U des embases avant 11 et arrière 13, peut comporter sur sa paroi latérale une lamelle souple 47 assurant un calage précis des plaques de maintien évitant ainsi tout problème lié à la dispersion géométrique du corps chauffant.In addition, each of the rails 41 U-shaped front plates 11 and rear 13 may have on its side wall a flexible blade 47 providing a precise wedging of the holding plates thus avoiding any problem related to the geometric dispersion of the heating body.

Les figures 9A à 10C, illustrent d'autres modes de réalisation d'un dispositif de chauffage 1 dans lequel un corps chauffant 3 est maintenu entre des embases avant 11 et arrière 13 par pliage d'une partie des deux plaques de maintien 5a6, 5b6, 5a7 et 5b7 sur des moyens de réception 19 intégrés dans les embases avant 11 et arrière 13.The Figures 9A to 10C , illustrate other embodiments of a heating device 1 in which a heating body 3 is held between the front 11 and rear 13 bases by folding a portion of the two holding plates 5a6, 5b6, 5a7 and 5b7 on reception means 19 integrated in the front 11 and rear 13 bases.

En effet, les moyens d'ancrage 17 des deux plaques de maintien 5a6, 5b6, 5a7 et 5b7 comportent des pattes 51 destinées à être pliées sur les moyens de réception 19 associés intégrés dans les embases avant 11 et arrière 13.Indeed, the anchoring means 17 of the two holding plates 5a6, 5b6, 5a7 and 5b7 comprise tabs 51 intended to be folded on the associated receiving means 19 integrated in the front 11 and rear 13 bases.

Selon le mode de réalisation des figures 9A à 9C, chacun des moyens de réception 19 comporte des enfoncements 53 dans les parties supérieure et inférieure des embases avant 11 et arrière 13, de sorte que les pattes 51 aux extrémités des plaques de maintien 5a6 et 5b6 se plient dans les enfoncements respectifs.According to the embodiment of Figures 9A to 9C , each of the receiving means 19 has recesses 53 in the upper and lower portions of the front 11 and rear 13 bases, so that the tabs 51 at the ends of the holding plates 5a6 and 5b6 bend in the respective recesses.

En variante, les figures 10A à 10C montrent que les boîtiers rectangulaires des embases avant 11 et arrière 13 présentent sur leurs côtés latéraux des rails 141, par exemple en forme de U et chacun des moyens de réception 19 comporte des ergots 55 formés sur ces rails, de sorte que les pattes 51 aux extrémités des plaques de maintien 5a7 et 5b7 se plient sur les rails 141 juste à l'extérieur des ergots 55.Alternatively, the Figures 10A to 10C show that the rectangular housings of the front 11 and rear 13 bases have on their lateral sides rails 141, for example U-shaped and each of the receiving means 19 has lugs 55 formed on these rails, so that the tabs 51 to ends of the holding plates 5a7 and 5b7 fold on the rails 141 just outside the lugs 55.

Selon cet exemple, les deux plaques de maintien 5a7 et 5b7 présentent une forme de U sur toutes leurs longueurs entre les ergots 55 et s'adaptent sur les rails 141 des embases avant 11 et arrière 13.According to this example, the two holding plates 5a7 and 5b7 have a U-shape in all their lengths between the lugs 55 and fit on the rails 141 of the front 11 and rear 13 bases.

En effet, pour assembler le corps chauffant dans les embases 11 et 13, les petites pattes 51 aux extrémités des plaques de maintien 5a7 et 5b7 sont relevées pour permettre le montage des embases 11 et 13 en les faisant coulisser dans les deux plaques de maintien 5a7 et 5b7. Ensuite, ces petites pattes 51 sont repliées sur les rails 141 enfermant ainsi les ergots 55.Indeed, to assemble the heating body in the bases 11 and 13, the small tabs 51 at the ends of the holding plates 5a7 and 5b7 are raised to allow the mounting of the bases 11 and 13 by making them slide in the two holding plates 5a7 and 5b7. Then, these small tabs 51 are folded over the rails 141 thus enclosing the lugs 55.

En outre, chacun des rails 141 en forme de U peut comporter sur sa paroi latérale une lamelle souple 147 assurant un calage précis des plaques de maintien 5a7 et 5b7 évitant ainsi tout problème lié à la dispersion géométrique du corps chauffant 3.In addition, each of the rails 141 in the shape of a U may comprise on its side wall a flexible strip 147 providing a precise wedging of the holding plates 5a7 and 5b7 thus avoiding any problem related to the geometrical dispersion of the heating body 3.

Claims (20)

  1. Electric heating device (1) comprising a heating body (3) comprising a plurality of conductive plates (4), between which are mounted heating resistive elements (7) and radiant elements (9) increasing the heat exchange surface area with a flow of air passing through the heating device, the heating body (3) being arranged between a front base (11) and a rear base (13), said heating body (3) further comprising at least one securing plate (5; 5a, 5b) of the heating body (3) comprising, at its ends, anchoring means (17) cooperating with associated receiving means (19), by clipping, and incorporated in the front (11) and rear (13) bases, in order to fixedly secure the heating body (3) between these front (11) and rear (13) bases, characterized in that the front (11) and rear (13) bases are in the form of rectangular boxes suitable for accommodating the ends of the heating body (3) and having, on their lateral sides, rails (41) extending beyond the bases and cooperating with two securing plates (5a, 5b) arranged on the two outer lateral sides of the heating body (3).
  2. Device according to Claim 1, characterized in that at least a part of said conductive plates (4) protrudes at the front base (11) to form terminals (15) for connecting to an electrical power supply circuit.
  3. Device according to Claim 1 or 2, characterized in that the receiving means (19) comprise flexible tongues (25; 125) formed in the top and bottom parts of the front (11) and rear (13) bases.
  4. Device according to any one of Claims 1 to 3, characterized in that the two securing plates (5a3, 5b3) of the heating body (3) comprise transverse walls having a U shape at least at their two ends, each of the anchoring means (17) is formed by cutouts in said transverse walls, such that the flexible tongues (125) fit into the cutouts of the outer conductive plates (5a3, 5b3).
  5. Device according to any one of Claims 1 to 4, characterized in that the receiving means (19) comprise flexible tongues (225; 325) formed in said U-shaped rails (41).
  6. Device according to any one of Claims 1 to 5, characterized in that the two securing plates (5a4, 5b4; 5a5, 5b5) of the heating body (3) comprise transverse walls having a U shape at least at their two ends.
  7. Device according to Claim 6, characterized in that the two outer conductive plates (5a4, 5b4; 5a5, 5b5) are U-shaped over their entire lengths.
  8. Device according to any one of Claims 1 to 3, and 5 to 7, characterized in that each of the anchoring means (17) is formed by a void (43) in the plane of each of said securing plates (5a4, 5b4) having the U shape at at least their two ends, and the flexible tongues (225) are formed on the lateral walls of the U-shaped rails (41), such that said flexible tongues fit into the voids (43) of the securing plates (5a4, 5b4).
  9. Device according to any one of Claims 1 to 3, and 5 to 7, characterized in that each of the anchoring means (17) is formed by cutouts (45) in the transverse walls of said securing plates (5a5, 5b5) having the U shape at at least their two ends, and the flexible tongues (325) are formed in the branches of the U of the rails (41), such that the flexible tongues (325) fit into the cutouts (45) of the securing plates (5a5, 5b5).
  10. Device according to Claim 9, characterized in that each of the U-shaped rails (41) comprises, on its lateral wall, a thin flexible strip (47) ensuring an accurate alignment of the securing plates thus avoiding any problem associated with the geometrical dispersion of the heating body (3).
  11. Device according to Claim 1, characterized in that the anchoring means (17) of the two securing plates (5a6, 5b6; 5a7, 5b7) comprise tabs (51) intended to be folded on the associated receiving means (19) incorporated in the front (11) and rear (13) bases.
  12. Device according to Claim 11, characterized in that each of the receiving means (19) comprises indentations (53) in the top and bottom parts of the front (11) and rear (13) bases, such that said tabs of said securing plates (5a6, 5b6) are folded in the respective indentations (53).
  13. Device according to Claim 11, characterized in that the rectangular boxes of the front (11) and rear (13) bases have, on their lateral sides, U-shaped rails (141) and each of the receiving means (19) comprises snugs (55) formed on these rails, such that said tabs (51) of said securing plates (5a7, 5b7) are folded on the rails (141) just outside the snugs (55).
  14. Device according to Claim 13, characterized in that the two securing plates (5a7, 5b7) have a U shape over their entire lengths between the snugs (55) and are adapted to the rails (141) of the front (11) and rear (13) bases.
  15. Device according to Claim 14, characterized in that each of the U-shaped rails (141) comprises, on its lateral wall, a thin flexible strip (147) ensuring an accurate alignment of the securing plates (5a7, 5b7) thus avoiding any problem associated with the geometrical dispersion of the heating body (3).
  16. Device according to any one of Claims 1 to 15, characterized in that all the elements of the heating body (3) are fixed together by gluing, except for the two securing plates (5a, 5b).
  17. Device according to any one of Claims 1 to 16, characterized in that all the elements of the heating body (3) are fixed together by gluing, including the two securing plates (5a, 5b).
  18. Device according to any one of Claims 1 to 17, characterized in that the conductive plates (4) have folds at the ends of the heating body (3) in order for the connection terminals (15) to have a standard pitch.
  19. Device according to any one of Claims 1 to 18, characterized in that the securing plate or plates (5; 5a, 5b) also form one or more conductive plates.
  20. Device according to any one of Claims 1 to 19, characterized in that the front (11) and rear (13) bases are made of plastic material.
EP04005884.4A 2003-03-25 2004-03-12 Electric heating device having a heating body Expired - Lifetime EP1462733B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0303658A FR2853198B1 (en) 2003-03-25 2003-03-25 ELECTRICAL HEATING DEVICE COMPRISING A HEATING BODY
FR0303658 2003-03-25

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EP1462733A1 EP1462733A1 (en) 2004-09-29
EP1462733B1 true EP1462733B1 (en) 2014-10-22

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CN (1) CN1532080A (en)
FR (1) FR2853198B1 (en)

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EP1967398A1 (en) 2007-03-06 2008-09-10 CEBI S.p.A. Electric heater for vehicle ventilation systems
FR2922817B1 (en) * 2007-10-31 2012-12-21 Valeo Systemes Thermiques DEVICE FOR ELECTRICALLY HEATING AN AIR FLOW CIRCULATING INSIDE A VENTILATION, HEATING AND / OR AIR CONDITIONING INSTALLATION OF A MOTOR VEHICLE
FR2942867B1 (en) * 2009-03-03 2011-03-25 Valeo Systemes Thermiques HEATING DEVICE, IN PARTICULAR FOR A MOTOR VEHICLE
KR101510744B1 (en) * 2014-04-23 2015-04-09 자화전자(주) Electric heater
FR3032390B1 (en) * 2015-02-10 2018-07-27 Valeo Systemes Thermiques HOUSING OF AN ELECTRIC HEATING DEVICE
CN105409653A (en) * 2015-11-25 2016-03-23 浙江哈亿曼电子科技有限公司 Greenhouse using solar energy and PTC heating pieces
FR3056067B1 (en) * 2016-09-09 2020-11-13 Valeo Systemes Thermiques ELECTRIC HEATING DEVICE
FR3056454B1 (en) * 2016-09-29 2019-04-19 Valeo Systemes Thermiques FRAME FOR AN ELECTRIC HEATING DEVICE COMPRISING A PLASTIC DEFORMATION MEANS
FR3056456B1 (en) * 2016-09-29 2018-09-14 Valeo Systemes Thermiques FRAME FOR AN ELECTRIC HEATING DEVICE COMPRISING A PLASTIC DEFORMATION MEANS
FR3062964A1 (en) 2017-02-14 2018-08-17 Valeo Systemes Thermiques ELECTRICAL CONNECTION INTERFACE OF AN ELECTRICAL HEATING DEVICE FOR A MOTOR VEHICLE
FR3078145B1 (en) * 2018-02-19 2021-10-29 Valeo Systemes Thermiques FRAME OF AN ELECTRIC HEATING DEVICE INCLUDING AN ELASTICALLY DEFORMABLE ELEMENT
CN109131398A (en) * 2018-09-04 2019-01-04 佛山铮荣科技有限公司 The rail carriages electric heater of high security
FR3101401B1 (en) * 2019-09-26 2021-10-01 Valeo Systemes Thermiques Heating block of a heating device.

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FR2853198B1 (en) 2006-03-24
CN1532080A (en) 2004-09-29
EP1462733A1 (en) 2004-09-29
FR2853198A1 (en) 2004-10-01

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