EP3393202B1 - Élément chauffant ptc et son procédé de fabrication - Google Patents

Élément chauffant ptc et son procédé de fabrication Download PDF

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Publication number
EP3393202B1
EP3393202B1 EP18167827.7A EP18167827A EP3393202B1 EP 3393202 B1 EP3393202 B1 EP 3393202B1 EP 18167827 A EP18167827 A EP 18167827A EP 3393202 B1 EP3393202 B1 EP 3393202B1
Authority
EP
European Patent Office
Prior art keywords
ptc
conductors
insulating layer
sheet metal
heating element
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.)
Active
Application number
EP18167827.7A
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German (de)
English (en)
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EP3393202A1 (fr
Inventor
Marcel Lösch
Michael Niederer
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.)
Eberspaecher Catem GmbH and Co KG
Original Assignee
Eberspaecher Catem GmbH and Co KG
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.)
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Publication of EP3393202A1 publication Critical patent/EP3393202A1/fr
Application granted granted Critical
Publication of EP3393202B1 publication Critical patent/EP3393202B1/fr
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/24—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor being self-supporting
    • 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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H05B2203/023—Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system

Definitions

  • the present invention relates to a PTC heating element with the preamble features of claim 1.
  • a PTC heating element is usually part of an electric heater and is made DE 10 2012 013 770 A1 known.
  • Similar PTC heating elements are off EP 2 337 425 A1 .
  • the present invention relates in particular to a heating element for an electrical heating device in a motor vehicle.
  • PTC heating elements such as, for example EP 1 253 808 A1 or.
  • EP 1 395 098 A1 are known, depending on an electrical conductor on opposite major side surfaces of the PTC element.
  • the conductor track is usually formed from a contact plate, which is connected to a position frame, for example, is sealingly sealed in the position frame.
  • PTC elements have self-regulating properties. With increasing heating, the power consumption decreases as the electrical resistance of the PTC element increases. Thus, one has always strived for a good heat extraction from the PTC element. Furthermore, in PTC heating elements for the automotive industry to ensure cost-effective production. The structure of the PTC heating element must be scalable and reliably producible even within large tolerance limits within predetermined tolerance limits.
  • the present invention has for its object to provide a PTC heating element, which allows a high heat extraction and good efficiency.
  • the present invention proposes a PTC heating element having the features of claim 1.
  • the electrical contacting takes place via end faces of the PTC element. Accordingly, there is an electrical contact for the introduction of the power current in the PTC element at the end faces.
  • the frontal surfaces are those Surfaces that connect the major side surfaces.
  • the contacting can take place on opposite longitudinal sides and / or on the broad sides of the PTC element.
  • a provided on the two main side surfaces of the PTC element trace is usually missing.
  • the PTC heating elements are less thick. Since the heat extraction mainly takes place via the main side surfaces of the PTC element, a higher heat density can be achieved with the face-side surface contacting of the PTC element.
  • the heat of the PTC element can be dissipated better via these main side surfaces of the PTC element than in the prior art.
  • the heat is usually introduced directly into an insulating layer and transmitted via this by means of heat conduction to the outer surface and discharged there.
  • the outer surface of the insulating layer is usually exposed in the flow of the fluid to be heated.
  • the PTC heating element according to the invention can be used as a PTC heating element in a water or air heater.
  • both conductor tracks may be formed as sheet metal strips and provided with corresponding contact springs, wherein each sheet metal strip has at least one contact spring, possibly also a plurality of successive contact springs to touch the end face of the PTC element at different locations and to energize them there.
  • the conductor tracks are preferably formed by identically shaped metal strips, whereby the productivity in the production of the PTC heating element according to the invention can be increased.
  • both conductor tracks are formed by sheet metal strips, of which at least one sheet metal strip, preferably both sheet metal strips, forms at least one contact spring (s).
  • This contact spring is elastically against an end face of the PTC element.
  • the two metal strips are electrically connected to each other via insulating bridge elements.
  • the bridge elements can be plugged onto the sheet metal strips in order to secure a position of the sheet metal strips, in which the one of the contact springs can already rest under elastic bias on a front side surface of the PTC element.
  • the contact plates are usually applied against the PTC element with elastic deformation of the contact spring (s). Thereafter, the bridge elements are pushed over the end of the sheet metal strips to secure the position of the metal strip relative to the PTC element.
  • a bridge element in such a way that the metal strip on one side in the bridge element can be inserted.
  • the metal strips should be pivotable relative to the bridge element in order to approximate the contact spring (s) against the end face of the PTC element, in this case to pivot the metal strips and this subsequently in a substantially parallel orientation to each other by another bridge element in the corresponding end position to back up.
  • the bridge element and the metal strip has interlocking interlocking means, via which the bridge element and the metal strip are connected to each other.
  • This embodiment leaves open the possibility to move the metal strips parallel to each other, including the PTC element until the contact spring (s) abuts against the end face (s) of the PTC element (s), so that via this contact spring (s) electrical contacting of the PTC element can take place.
  • This end position of the metal strip is secured by the interlocking means.
  • the sheet metal strips punched retaining eyes have, in which protrude cams of the bridge element to connect the metal strips together and to secure against the required to hold the spring force of the contact spring holding force.
  • the bridge element is preferably associated with a counter element, which is connectable to the bridge element for securing the positive connection.
  • the counter element may be formed identically to the bridge element, so that the cam of the one bridge element can be locked in a recess of the counter element and a cam of the counter element in a recess of the bridge element.
  • the bridge element and the counter element are connected to each other, preferably locked together.
  • the two sheet-metal strips are positioned in a predetermined manner relative to one another via the cams penetrating the holding tongues and held captive.
  • the bridge element or the counter element are preferably made of a technical plastic, in particular a hard component such as polyamide, PBT or polyethylene.
  • the plastic can be reinforced by fibers. It is in particular a plastic to choose, which has a relatively high temperature resistance, so that even under the operating conditions of the PTC heating element, the bridge element and the counter element position the two metal strips relative to each other so that a secure contact of the PTC element between the metal strip over the Life is maintained.
  • the aforementioned positive locking means are preferably designed as latching means. These locking means usually have latching guide surfaces perpendicular to the direction of force action extend the spring force of the contact spring. As part of the joining of the latching connection, the latching means engage on top of each other, so that the positive connection is secured in the joining direction. Usually, however, the locking means are movable in the direction of the direction of force of the contact spring, in order to enable the manufacture and possibly release of the latching connection.
  • a securing means is proposed, which cooperates with the bridge element, preferably integrally formed thereon and has a spring force of the contact spring counteracting backup surface. This backup surface is not part of the locking surfaces. Usually, the backup surfaces are outside the locking means.
  • the securing surfaces may for example be provided on a projection which cooperates directly with the metal strip or a counter-projection formed on the counter-element.
  • the PTC heating element is preferably provided with an insulating layer.
  • This insulating layer covers the PTC element.
  • the insulating layer is preferably directly against the PTC element.
  • the insulating layer may in this case be connected via an adhesive layer to the PTC element.
  • the insulating layer between adjacent bridge elements or counter-elements to the bridge elements preferably on all sides of the bridge element and / or the metal strip spaced, on the PTC element.
  • the bridge element and / or the counter element have positioning projections, between which the insulating layer is positioned.
  • the conductor tracks are enveloped with a plastic material, which forms an edge of the insulating layer, this otherwise but essentially free-standing plastic frame.
  • the plastic material for forming the plastic frame is preferably an elastic thermoplastic material, for example a TPE or a duroplastic or elastomer. It should be selected a plastic material, which has good wetting properties to the material of the insulating layer.
  • the insulating layer is preferably through a ceramic layer formed, for example, an alumina plate. In this case, also, the adhesive layer between the PTC element and the insulating layer prevents voltage spikes, by which the relatively brittle alumina plate can break.
  • the present invention further proposes a method for producing a PTC element.
  • a PTC element is arranged between two interconnects, of which at least one interconnect is formed by a metal strip which forms a contact spring. It goes without saying that this metal strip can also form several contact springs. Thereafter, the traces are approximated until the contact spring is biased against an end face of the PTC element. Thereupon, the setting of the conductor tracks to secure the elastic contacting takes place on an end face of the PTC element by the elastically deformed contact spring.
  • a heat cell is provided with a PTC element which is contacted in a simple and secure manner at its end face.
  • the heat extraction from the PTC element over the main side surfaces thereof can be improved.
  • the conductor tracks are defined by an electrically insulating bridge element by positive connection of the bridge element with at least one of the conductor track.
  • the positive connection between the bridge element and the respective conductor track, especially in the form of a sheet metal strip is formed.
  • an insulating layer is glued to the PTC element, which is arranged between adjacent bridge elements. After the conductor tracks have been laid, another insulating layer is placed on the other, free side of the PTC element.
  • the two main side surfaces of the PTC element are provided with an insulating layer and are not exposed with their current-carrying surfaces in the medium to be heated.
  • the conductor tracks are usually sheathed in an insulating manner. This is preferably done by a the printed conductors and the insulating layers on the edge, the insulating layers but otherwise essentially free-standing plastic frame.
  • the plastic frame is made regularly by molding a plastic material.
  • a counter element is connected to the associated bridge element. This connection is usually made before placing the other insulating layer and to secure the connection between the bridge element and the conductor track.
  • the provided on the counter element lateral position projections improve the positionally accurate positioning of the insulating layer.
  • the FIG. 1 shows a conductor made by punching and bending of a sheet metal strip 2.
  • the sheet-metal strip 2 forms a punched-formed by contact tongue 4, which can be used as a male plug-in element in a plug receptacle, for example, a terminal board or a plug.
  • the sheet metal strip 2 is divided into three identical segments 6. Each individual segment 6 has two contact springs 8 formed by stamping and bending. The contact springs 8 form a convexly curved contact surface 10 for engagement with a PTC element, which is in FIG. 2 represented and identified there by reference numeral 12.
  • the metal strips 2 each have between the segments 6 and at the end thereof provided widened connecting segments 14 which project inward and are provided with a retaining eye 16.
  • FIG. 1 four identically shaped bridge elements 18 are shown, which form a support surface 20 for the sheet metal strip 2. In about the middle width of the bridge element 18, this is surmounted by projecting into the respective segments 6 spacers 22 which are integrally formed on the bridge segment 18. Also integrally on the bridge segment 18 positioning projections 24 are provided. While the spacers 22 are located on the plane occupied by the sheet metal strip 2, the positioning projections are located 24 below this level, leaving only the in FIG. 1 front positioning projections 24 can be seen. As FIG. 1 it can be seen, the spacers 22 are off-center relative to an imaginary central longitudinal axis L, which extends through the center of the respective bridge elements 18.
  • Each bridge member 18 has on opposing sides with respect to the spacer 22, a cam 26 which is formed of four radially elastically deformable locking elements, each forming a quadrant of the cam 26, and a recess 28 adapted to receive the elastic cam 26 adapted is.
  • FIG. 1 is by reference numeral 30, an insulating layer present in the form of an alumina plate recognizable.
  • This alumina plate is located below the respective spacers 22 and between opposing positioning projections 24. By these positioning projections 24, the insulating sheet 30 is positioned in the width direction.
  • the retaining eyes 16 are pushed over the cam 26, so that the sheet metal strip 2 in the in FIG. 1 shown phase of the assembly is already locked to the respective bridge elements 18.
  • an adhesive layer can be applied to the insulating layer 30.
  • the adhesive layer is applied to the inner major side surface of the insulating layer 30.
  • FIG. 2 shows the subsequent manufacturing step, in which on the one hand marked with the reference numeral 12 PTC element is placed on the inner surface of the insulating layer 30 and glued over the adhesive with this. Furthermore, a second identical to the sheet metal strip 2 formed sheet metal strip 32 is pre-positioned as another conductor. As can be seen, the contact surfaces 10 of this metal strip 32 are at a distance from the PTC element 12. The retaining eyes 16 of the metal strip 32 are also not aligned with the recesses 28 of the bridge elements 18.
  • FIG. 3 are the two metal strips 2, 32 moved towards each other and thus approximated each other.
  • the contact surfaces 10 of the provided on the metal strip 32 contact springs 8 lie against an end face 34 of the PTC element 12.
  • the contact surfaces 10 lie against the longitudinal end face 34th of the PTC element 12, whereas the end faces on the broad side of the PTC element are positioned over the spacers 22 and kept at a distance from the actual bridge elements 18. This results in a best-case selective contact between the bridge element 18 and the PTC element 12, whereby air and creepage distances are controllable.
  • the bridge element 18 is made of an electrically insulating plastic material.
  • FIGS. 4 and 5 make it clear that the cams 26 each engage in the recesses 28 of the counter-element 36.
  • cams 26 of the counter-element 36 engage in associated recesses 28 of the bridge element 18.
  • the bridge elements 18 and the counter-elements 36 are each locked in pairs with the inclusion of the metal strips 2, 32, in order to secure a resilient biasing force over which the contact springs 8 abut the front side against the PTC elements 12.
  • an adhesive is usually applied to the major side surface of the PTC element 12 To bond the insulating layers 38 here with the main side surface of the PTC element 12. This results in an improved heat transfer between the main side surface of the PTC element 12 and the opposite insulating layers 30, 38th
  • FIG. 5 molded intermediate product with an elastic plastic, which may be formed by a thermoplastic in the form of a TPE, an elastomer or a duromer.
  • an elastic plastic which may be formed by a thermoplastic in the form of a TPE, an elastomer or a duromer.
  • the encapsulation takes place with complete inclusion of the elements 18, 36.
  • the insulating layers 30, 38 are grasped at the edge by the plastic to be encapsulated. This results in a plastic frame 40, which leaves only windows in which the insulating layers 30, 38 exposed and which is adapted to transmit the heat generated by the PTC element 12 to the medium to be heated directly over the insulating layer 30 and 38 respectively ,
  • FIG. 6 further illustrates a formed by the elastic material of the plastic frame 40 sealing structure 42 which adjacent to the contact tongues 4, the local elements 18, 36 is provided substantially circumferentially surrounding.
  • the sealing structure 42 comprises a plurality of circumferential sealing beads 44, which widen conically radially starting from the contact tongues 4.
  • This sealing structure 42 forms a male element of a stretched connection for inserting the embodiment shown into a partition wall of an electric heating device, which fluid-tightly separates a circulation chamber, which carries the fluid to be heated, from a connection chamber in which the PTC heating element shown here reaches over its contact tongues 4 electrically connected.
  • a circuit board or other means may be provided for grouping a plurality of PTC heating elements into a heating circuit and / or a control device for controlling the power current of the PTC heating element (s); (see. EP 2 607 121 B1 . EP 2 440 004 B1 . EP 1 921 896 ).
  • the contact tongues 4 project beyond the insulating plastic frame 40. All other electrically conductive parts of the PTC heating element are covered in an insulating manner by the plastic frame 40.
  • the mutual spacers 22 abut each other with securing surfaces lying opposite one another at the level of the central longitudinal axis L.
  • the corresponding backup area is in FIG. 2 designated by reference numeral 46.
  • the spacer 22 forms with its base accordingly a securing projection whose securing surface 46 is perpendicular to the line of action of the force applied by the contact spring 8 spring force extends.
  • this backup surface 46 is formed by the other spacer 22 as a securing counter-projection on the counter-element 36 form-fitting manner. So here is the spring force by positive engagement of two locking surfaces 46, which are integrally formed on the bridge element 18 and counter element 36, held. This positive connection relieves the extent formed by the holder eyes 16 and the cam 26 positive connection. Due to the rigid locking surfaces 46, a solid support of the spring force is achieved, which can not be guaranteed due to the radial elasticity of the cam 26 with the necessary accuracy positioning.

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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)
  • Resistance Heating (AREA)
  • Thermistors And Varistors (AREA)

Claims (14)

  1. Elément chauffant PTC avec un élément PTC (12), qui est contacté de manière électriquement conductrice à deux polarités différentes à l'aide de deux pistes conductrices électriques (2, 32), caractérisé en ce que les deux pistes conductrices sont réalisées chacune respectivement par une bande de tôle (2, 32) d'étendue sensiblement plate, qui forme au moins un ressort de contact (8) s'étendant dans le plan de la bande de tôle (2, 32) et s'appuyant de manière élastique contre une surface de côté frontal (34) de l'élément PTC (12).
  2. Elément chauffant PTC selon la revendication 1, caractérisé en ce que les deux pistes conductrices sont réalisées par des bandes de tôle (2, 32), et en ce que les deux bandes de tôle (2, 32) sont de conformation identique.
  3. Elément chauffant PTC selon la revendication 1 ou la revendication 2, caractérisé en ce que les deux pistes conductrices sont réalisées par une bande de tôle (2, 32), qui forment chacune respectivement au moins un ressort de contact (8) s'appuyant de manière élastique contre une surface de côte frontal (34) de l'élément PTC (12), et en ce que les deux bandes de tôle (2, 32) sont reliées mutuellement par des éléments de pontage (18, 36) électriquement isolants.
  4. Elément chauffant PTC selon l'une des revendications précédentes, caractérisé en ce que les bandes de tôle (2, 32) sont reliées, par l'intermédiaire de moyens de liaison par complémentarité de formes (16, 26) s'engageant les uns dans les autres, à un élément de pontage (18) électriquement isolant, et en ce qu'à l'élément de pontage (18) est associé un élément conjugué (36), qui peut être relié à l'élément de pontage (18) pour sécuriser la liaison par complémentarité de formes.
  5. Elément chauffant PTC selon la revendication 4, caractérisé en ce que l'élément de pontage (18) et l'élément conjugué (36) sont de configuration identique.
  6. Elément chauffant PTC selon la revendication 4 ou la revendication 5, caractérisé en ce que les moyens de liaison par complémentarité de formes sont réalisés par des moyens d'encliquetage (16, 26) formant des surfaces d'encliquetage, et en ce que l'élément de pontage (18) interagit avec un moyen de sécurisation (22), qui, lorsque les bandes de tôle (2, 32) sont assemblées, forme une surface de sécurisation (46) faisant office de butée antagoniste à la force de ressort du ressort de contact (8).
  7. Elément chauffant PTC selon l'une des revendications précédentes, caractérisé en ce que l'élément PTC (12) est recouvert d'une couche isolante (30, 38), et en ce que les pistes conductrices (2, 32) sont enveloppées d'une matière plastique, qui forme un cadre de matière plastique (40) enserrant la couche isolante (30, 38) sur les bordures, mais laissant celle-ci sensiblement libre par ailleurs.
  8. Elément chauffant PTC selon la revendication 7, caractérisé en ce que la couche isolante (30, 38) est formée par une couche de céramique assemblée par collage à l'élément PTC (12).
  9. Elément chauffant PTC selon la revendication 7 ou la revendication 8 et l'une des revendications 4 à 6, caractérisé en ce que l'élément de pontage (18) et/ou l'élément conjugué (36) présentent des protubérances de positionnement (24) latérales, entre lesquelles est positionnée la couche isolante (30, 38).
  10. Procédé de fabrication d'un élément chauffant PTC selon l'une des revendications 1 à 9, d'après lequel on agence un élément PTC (12) entre deux pistes conductrices (2, 32) dont au moins une piste conductrice est formée par une bande de tôle, qui forme au moins un ressort de contact (8), d'après lequel on rapproche les deux pistes conductrices (2, 32) jusqu'à ce que le ressort de contact (8) s'appuie sous précontrainte contre une surface de côté frontal (34) de l'élément PTC (12), et on fixe les deux pistes conductrices (2, 32) dans cette position.
  11. Procédé selon la revendication 10, caractérisé en ce que l'on assure la fixation des deux pistes conductrices (2, 32) à l'aide d'un élément de pontage (18) électriquement isolant, par une liaison par complémentarité de formes de l'élément de pontage (18) avec au moins l'une des deux pistes conductrices (2, 32).
  12. Procédé selon la revendication 10 ou la revendication 11, caractérisé en ce que l'on assemble par collage l'élément PTC (12) à une couche isolante (30, 38), qui est agencée entre des éléments de pontage voisins, et en ce qu'après la fixation des deux pistes conductrices (2, 32), on applique une autre couche isolante (38) sur l'élément PTC (12).
  13. Procédé selon la revendication 12, caractérisé en ce que l'on enveloppe les deux pistes conductrices (2, 32) par une matière plastique enserrant les couches isolantes sur leur bordure mais les laissant sensiblement libres par ailleurs.
  14. Procédé selon la revendication 12 ou la revendication 13, caractérisé en ce qu'avant l'application de l'autre couche isolante (38), on relie un élément conjugué (36) à l'élément de pontage (18) pour sécuriser la liaison entre l'élément de pontage (18) et au moins l'une des deux pistes conductrices (2, 32).
EP18167827.7A 2017-04-18 2018-04-17 Élément chauffant ptc et son procédé de fabrication Active EP3393202B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017206487.0A DE102017206487B4 (de) 2017-04-18 2017-04-18 PTC-Heizelement und Verfahren zu dessen Herstellung

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EP3393202A1 EP3393202A1 (fr) 2018-10-24
EP3393202B1 true EP3393202B1 (fr) 2019-07-24

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Publication number Priority date Publication date Assignee Title
DE102019204401A1 (de) 2019-03-28 2020-10-01 Eberspächer Catem Gmbh & Co. Kg PTC-Heizelement und elektrische Heizvorrichtung umfassend ein solches
DE102019204472A1 (de) * 2019-03-29 2020-10-01 Eberspächer Catem Gmbh & Co. Kg Wärmeerzeugendes Element und elektrische Heizvorrichtung enthaltend ein solches
EP3922473A1 (fr) 2020-06-12 2021-12-15 Bundesdruckerei GmbH Procédé de production d'une image imprimée sur un support de données pour un document de sécurité ou de valeur

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DE102017206487A1 (de) 2018-10-18
DE102017206487B4 (de) 2020-07-02

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