EP3503671B1 - Dispositif de chauffage électrique ainsi que son procédé de fabrication - Google Patents

Dispositif de chauffage électrique ainsi que son procédé de fabrication Download PDF

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Publication number
EP3503671B1
EP3503671B1 EP18213797.6A EP18213797A EP3503671B1 EP 3503671 B1 EP3503671 B1 EP 3503671B1 EP 18213797 A EP18213797 A EP 18213797A EP 3503671 B1 EP3503671 B1 EP 3503671B1
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EP
European Patent Office
Prior art keywords
heat
compound
electrically insulating
ptc element
ptc
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
EP18213797.6A
Other languages
German (de)
English (en)
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EP3503671A1 (fr
Inventor
Kurt Walz
Kai-Fabian Bürkle
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 EP3503671A1 publication Critical patent/EP3503671A1/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
    • H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • H05B3/262—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an insulated metal plate
    • 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
    • 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
    • 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
    • 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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • 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
    • H05B3/40—Heating elements having the shape of rods or tubes
    • 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
    • H05B2203/022—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 an electrical heating device, in particular for a motor vehicle, with heat-emitting elements and with a heat-generating element which is thermally conductively connected to the heat-emitting elements on opposite main side surfaces and has a positioning frame and at least one PTC heating element which is provided in the positioning frame and has main side surfaces for heat extraction.
  • This PTC element is connected to contact plates of different polarity.
  • the main side surfaces of the positioning frame are provided with a frame opening leading to the PTC element.
  • Such prior art is, for example, from EP 1 768 459 A1 known.
  • a contact sheet which is provided with insulation on the outside, rests on opposite main side surfaces of the PTC element.
  • a heat-dissipating element in the form of a layer of corrugated ribs rests against this insulation.
  • EP 2 397 788 A1 can be regarded as generic and anticipating the preamble features of claim 1.
  • EP 3 101 365 A1 discloses a heat generating element received in a U-shaped recess. This consists of a PTC element and contact plates glued to it on both sides. This heat-generating cell is wrapped in an electrically insulating foil and placed in the U-shaped pocket. A wedge element presses the heat generating element within the pocket against the inner surfaces of the U-shaped pocket.
  • the present invention is based on the problem of specifying an electrical heating device and a method for producing such that can be operated with good efficiency, with the method being able to be carried out simply and reliably.
  • an electric heating device with the features of claim 1 is proposed with the present invention.
  • This differs from the aforementioned prior art in that the electrically insulating mass bridges the distance between the heat-emitting element and the PTC element or the contact plate in a direction perpendicular to the main side surface of the PTC element and that the heat-emitting element against the electrically insulating mass is applied and connected to the heat-generating element via the electrically insulating mass.
  • the present invention is based on the consideration that the positioning frame specifies a receiving space which is in liquid or viscous form with the electrically insulating mass state can be filled. This receiving space is surrounded at least laterally, possibly also completely, by the positioning frame.
  • the positioning frame can form a corresponding receiving space for both main side surfaces of the PTC element.
  • the PTC element is usually located centrally in the positioning frame in the vertical direction. Due to its design, the positioning frame can specify one PTC recording or multiple PTC recordings for the predetermined positioning of multiple PTC elements within the positioning frame.
  • the PTC recordings usually specify the position of a PTC element in a form-fitting manner within the positioning frame.
  • the PTC element can be contacted on the face side with a contact plate.
  • the contact plate does not rest on a main side surface of the PTC element, but rather on a front edge surface of the PTC element that surrounds the main side surface.
  • the heat-emitting surface of the PTC element is at least partially exposed within the frame opening.
  • the electrically insulating mass is filled against the surface of the PTC element. Accordingly, the PTC element forms the lower limit of the frame opening.
  • the contact sheet delimits the frame opening on the underside and is wetted with the electrically insulating compound on the side opposite the PTC element.
  • the electrically insulating mass extends from the inside of the positioning frame, i. H. the surface of the PTC element and/or the contact plate to the outside, usually up to an outer surface of the positioning frame.
  • the electrically insulating compound is preferably applied against the surface of the heat-emitting element provided there before or during curing, so that the electrically insulating compound binds against the heat-emitting element when the electrically insulating compound hardens, which is to be preferred, and this binds to the PTC with good thermal conductivity -Element couples and also a unit of heat-emitting element and heat-generating element is formed. It goes without saying that this unit comprises two heat-emitting elements which are in contact with opposite main side surfaces of the positioning frame and are preferably joined in this way together with the heat-generating element to form a unit.
  • the heat-generating element does not have to be symmetrical in height direction, with the PTC element extending in the axis of symmetry.
  • One such configuration is although preferable.
  • a positioning frame with one or more PTC elements can be prepared first, which already forms a core or an insert made of a material with good thermal conductivity on one side, for example provided with an electrically insulating mass that is held against the heat-emitting element on this side of the alignment frame is glued. From the opposite side, for example, a PTC element, optionally with the associated contact plate, can be placed against such a layer of electrically insulating mass. This is followed by the filling of the opposite frame opening with the insulating compound.
  • the distance bridged by the mass extends in the vertical direction and thus in a direction at right angles to the extension of the main side surface of the PTC element or the positioning frame. As a rule, almost the entire main side surface of the PTC element is wetted with or covered by the mass.
  • the electrically insulating mass is preferably an addition-crosslinking two-component polymer, for example a correspondingly crosslinking silicone.
  • the polymer should be resistant to hydrolysis.
  • Good thermal conductivity of at least 2 W/(m K) is important.
  • the mass preferably has a thermal conductivity of 3, particularly preferably 5 W/(m K).
  • a proportion of filler is usually added to the mass.
  • This filler consists of particles with good thermal conductivity which, however, have electrically insulating properties.
  • particles of aluminum oxide can be used as a filler content. It can be gas or water atomized particles.
  • a filler content of at least 50% by volume is preferred, particularly preferably between 85% by volume and 95% by volume.
  • Flakes are preferably used as the filler content, ie particles with an irregular geometry and a considerable grain size distribution. Such a property of the proportion of filler improves the packing of the filler as densely as possible within the liquid phase. The particles can interlock well and have direct contact with each other, which has a favorable effect on the heat transport through the mass.
  • the proportion of filler with good thermal conductivity is preferably mixed in before mixing the components of each individual component. This improves the degree of mixing of the resulting electrically insulating composition.
  • the compound should also have a good dielectric strength of at least 10 kV/mm, more preferably at least 20 kV/mm.
  • the specific breakdown resistance should be at least 1.9 ⁇ 10 -5 ⁇ /cm.
  • the CTI value relevant for tracking resistance should be CTI > 600.
  • the electrically insulating compound can be designed in such a way that the two components crosslink at room temperature. Such crosslinking is known to be accelerated with increasing temperature.
  • the PTC element can be energized in order to crosslink the electrically insulating mass, and heat can thereby be generated inside the product to be manufactured.
  • the PTC element is usually operated with a voltage below the operating voltage. Optimum heating is important for controlled curing of the electrically insulating mass without the formation of bubbles. The temperature inside must not rise too quickly.
  • the voltage for curing the mass is set to a value that is below the actual operating point. In the case of a heat-generating element which is operated with a high voltage, for example 350 V, the voltage for heating may be 200 V.
  • the curing preferably takes place with a stamp, through which the electrically insulating mass is not only pressed in the frame opening, but is also cured.
  • This stamp can rest directly against the electrically insulating mass or with the interposition of the heat-emitting element or a part thereof.
  • the compressive stress is also used to securely connect the heat-emitting element to the heat-generating element and to permanently secure the connection by curing the electrically insulating mass.
  • the electrically insulating mass Before the electrically insulating mass has hardened and after it has been introduced into the frame opening, it can be smoothed out in order to remove excess material and make the surface more uniform, so that the heat-emitting element can be applied to the heat-generating element over the entire surface of the electrically insulating mass.
  • the stamp is preferably heated or heated before or during the pressing.
  • the positioning frame has projections projecting beyond the PTC element on both sides. These protrusions prevent you direct contact between the heat-emitting element, usually made of metal, and the electrically conductive parts of the heat-generating element.
  • the protrusions ensure a minimum space filled with the electrically insulating compound.
  • the corresponding contact surface is usually formed by pins that protrude beyond the PTC element on both sides.
  • the PTC element can be surmounted by a plurality of pins on its opposite main side surfaces, so that the PTC element is positively fixed in position between the pins within the positioning frame in the direction of the frame opening.
  • the pegs have an extent in the longitudinal direction of the usually elongated frame, which is preferably less than the longitudinal extent of the PTC element. This consideration is based on the fact that the material forming the positioning frame has poorer thermal conductivity than the electrically insulating mass, so that the surface areas of the material forming the positioning frame are within the frame opening, i.e. the space between the main side surface of the PTC element and the associated heat-emitting element should be filled with the electrically insulating mass as much as possible.
  • the heat-generating element can rest directly against one of the pins or with the mass interposed.
  • the method specified for solving the above problem with the present invention specifies the arrangement of at least one PTC element in the positioning frame and at a distance from the main side faces of the same. Then the frame opening is filled with an electrically insulating compound with good thermal conductivity. This mass is introduced into the frame opening in such a way that the distance between the main side surface and the PTC element is bridged. This distance is specified either by the surface of the PTC element itself or by a contact plate lying against this surface. What has been said about the device claim applies here accordingly.
  • a heat-emitting element is then placed against the mass, which can also be placed against parts, in particular projections, of the positioning frame, if necessary, in order to maintain the necessary distance from the PTC element.
  • the mass is then hardened by applying an external force against the heat-emitting element.
  • the heat-emitting element is thus connected to the heat-generating element when the compound hardens against the PTC element, with the compound being interposed.
  • the 1 shows a positioning frame 2, which is formed by two parallel extending positioning frame strips 4.
  • each of the positioning frame strips 4 has projections 6 spaced apart from one another in the longitudinal direction of the strips 4 and which extend in the vertical direction (cf. 1 ) are provided one above the other, so that they form a PTC receptacle 8 for a PTC element marked with reference numeral 10 .
  • the PTC element 10 is held in a form-fitting manner in the vertical direction H in the PTC receptacle 8 .
  • the PTC element 10 projects beyond the individual projections 6 in the longitudinal direction of the positioning frame strips 4. Between individual PTC elements 10, which are provided one behind the other in one plane in the longitudinal direction of the positioning frame 2, there is a gap 12 two adjacent PTC elements 10 spaced from each other.
  • the clear transverse distance between the two positioning frame strips 4 is selected such that a main side surface 14 of the PTC element 10 is completely exposed in a frame opening marked with reference number 16.
  • the main side surfaces 14 of the PTC elements 10 are contacted with contact plates 18 which are extended at least on one side beyond the positioning frame 2 in its longitudinal direction L in order to form contact tongues for the electrical connection of the electrical heating device.
  • the corresponding contact plates 18 are energized with different polarities, ie, after connection to a power supply, they are connected to line paths inside the vehicle of different polarities.
  • This connection can be made with the interposition of a control device integrated into a frame, preferably made of plastic, and an outer perimeter of a single, in 2 shown and marked with reference numeral 20 heating rod or several such heating rods 20 can be. This achieves a structural unit consisting of the heating element(s) 20 and the control device via the frame.
  • the 1 shows an electrically insulating mass 22 filled into the opposite frame openings 16 after this mass 22 has been applied to a main side surface 24 of the positioning frame has been smoothed out.
  • the electrically insulating mass 22 extends to the contact plates 18.
  • the mass 22 does not protrude beyond the positioning frame 2 in the height direction.
  • the mass 22 ends flush with the surface of the positioning frame 2.
  • Heat-emitting elements 26 are provided on both sides against the main side surface 24 of the positioning frame 2 .
  • These layers of corrugated ribs 26 consist of one sheet metal strip, if necessary of several sheet metal strips. At least one of the metal strips is bent over in a meandering manner to form corrugated ribs 28 of the heat-emitting element 26 .
  • the apex of these corrugated ribs 28 preferably rests directly against the main side surface 24 of the positioning frame 2 . You are fully or partially immersed in the electrically insulating mass.
  • the corrugated ribs 28 can also bear against a metal strip of the heat-emitting element 26 which is provided between the crests of the individual corrugated ribs and the main side surface 24 of the positioning frame 2 or the surfaces of the projections 6 .
  • the heat-emitting element 26 is connected to the electrically insulating mass 22 over its entire surface.
  • connection takes place, for example, after the heat-emitting layers 26 have been placed against the opposite main side surfaces 24 of the positioning frame 2. Then the respective heat-emitting elements 26 are pressed from the outside. These partially displace the electrically insulating mass 22 which has not yet hardened, possibly until the heat-emitting elements 26 come into contact with the projections 6 . The end position of the heat-emitting elements 26 is thus specified. A minimum distance is created between the heat-emitting elements 26 and the electrically conductive parts of a heat-generating element, identified by reference number 30 .
  • the heat-generating element 26 consists of the PTC elements 10, the contact plates 18 lying on both sides and the positioning frame 2 as well as the electrically insulating mass 22 filled therein and finally hardened preferably heated, so that the electrically insulating mass 22 hardens accelerated.
  • the heat-generating element 30 can be energized in order to 2 to heat the electric heating device shown on the inside as well, thus accelerating the curing process.
  • the projections 6 lie with their outer surface below the plane defining the main side surface 24 of the positioning frame 2 .
  • the heat-emitting Elements 26 are slightly narrower than the transverse spacing of the positioning frame strips 4 in the plane of the main side surface 24 of the positioning frame 2.
  • the heat-emitting elements 24 are also fixed by the positioning frame 2 in the width or transverse direction B of the positioning frame.
  • the heat-emitting elements 26 are then glued to the heat-generating element 30, but are also held in a form-fitting manner.
  • the figures only show a section of the heat-generating element 30 or the heating element 20 in the longitudinal direction.
  • the contact plates 18 with contact tongues integrally formed thereon by stamping usually protrude beyond the positioning frame 2 on one side.
  • positioning frame 2 protrudes beyond the ends of the contact plates.
  • a corresponding filling is carried out on the opposite side, leaving the contact tongues free, so that the heat-generating element can be easily electrically connected.

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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)

Claims (10)

  1. Dispositif de chauffage électrique, en particulier pour un véhicule automobile, comprenant un élément générateur de chaleur (30) et des éléments émetteurs de chaleur (26) qui sont appliqués sur celui-ci d'une manière conduisant la chaleur sur des côtés opposés, dans lequel l'élément générateur de chaleur (30) présente un cadre de positionnement (2) et au moins un élément PTC (10) qui est prévu dans le cadre de positionnement (2), et présente des surfaces latérales principales (14) pour le découplage thermique et est appliqué sur des tôles de contact (18) de polarité différente, dans lequel une surface latérale principale (24) du cadre de positionnement (2) est pourvue d'une ouverture de cadre (16) menant à l'élément PTC (10), dans lequel
    une masse électriquement isolante (22) présentant une bonne conductivité thermique est introduite dans l'ouverture de cadre (16), caractérisé en ce que la masse électriquement isolante (22) comble la distance entre l'élément émetteur de chaleur (26) et l'élément PTC (10) ou la tôle de contact (18) dans une direction perpendiculaire à la surface latérale principale (14) de l'élément PTC (10) et en ce que l'élément émetteur de chaleur (26) est appliqué contre la masse électriquement isolante (22) et est relié à l'élément émetteur de chaleur (26) par l'intermédiaire de la masse électriquement isolante (22).
  2. Dispositif de chauffage électrique selon la revendication 1, caractérisé en ce que le cadre de positionnement (2) forme l'élément PTC (10) avec des saillies (6) dépassant des deux côtés, qui forment des surfaces d'appui pour l'élément émetteur de chaleur (26).
  3. Dispositif de chauffage électrique selon la revendication 1 ou 2, caractérisé en ce que le cadre de positionnement (2) présente des deux côtés de l'élément PTC (10) des ouvertures de cadre (16), dans lesquelles est introduite respectivement la masse électriquement isolante (22), qui couvre la distance entre les éléments émetteurs de chaleur (26) et l'élément PTC (10) ou la tôle de contact associée (18).
  4. Dispositif de chauffage électrique selon l'une quelconque des revendications précédentes, caractérisé en ce que le cadre de positionnement (2) est formé par deux barres (4) s'étendant parallèlement, qui reçoivent entre elles plusieurs éléments PTC (10) et des tôles de contact (18) qui sont appliquées à celles-ci et qui sont reliées entre elles par l'intermédiaire de la masse électriquement isolante (22).
  5. Procédé de fabrication d'un dispositif de contact électrique selon l'une quelconque des revendications 1 à 4, dans lequel
    - au moins un élément PTC (10) est agencé dans un cadre de positionnement (2) à distance de surfaces latérales principales (24) du cadre de positionnement (2),
    - une masse électriquement isolante (22) présentant une bonne conductivité thermique est introduite dans une ouverture de cadre (16), laquelle permet de couvrir la distance entre l'une des surfaces latérales principales (24) et l'élément PTC (10),
    - un élément émetteur de chaleur (26) est appliqué contre la masse (22) et
    - la masse (22) est comprimée et durcie entre l'élément émetteur de chaleur (26) et l'élément PTC (10).
  6. Procédé selon la revendication 5, caractérisé en ce que la masse (22) est rendue lisse après l'introduction de la masse (22) dans l'ouverture de cadre (16).
  7. Procédé selon la revendication 5 ou 6, caractérisé en ce que la masse (22) est une masse de matière plastique réticulante qui est durcie par application de chaleur.
  8. Procédé selon l'une quelconque des revendications 5 à 7, caractérisé en ce que la masse (22) est comprimée par un poinçon chauffé dont l'apport de chaleur accélère le durcissement de la masse (22).
  9. Procédé selon l'une quelconque des revendications 5 à 8, caractérisé en ce que la masse (22) comprend un polymère à deux composants réticulant par addition, chacun des composants étant mélangé à une charge ayant une bonne conductivité thermique avant le mélange des composants.
  10. Procédé selon l'une quelconque des revendications 5 à 9, caractérisé en ce qu'une charge à géométrie et granulométrie irrégulières est mélangée à la masse (22).
EP18213797.6A 2017-12-22 2018-12-19 Dispositif de chauffage électrique ainsi que son procédé de fabrication Active EP3503671B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017223779.1A DE102017223779A1 (de) 2017-12-22 2017-12-22 Elektrische Heizvorrichtung sowie ein Verfahren zur Herstellung derselben

Publications (2)

Publication Number Publication Date
EP3503671A1 EP3503671A1 (fr) 2019-06-26
EP3503671B1 true EP3503671B1 (fr) 2023-02-22

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EP18213797.6A Active EP3503671B1 (fr) 2017-12-22 2018-12-19 Dispositif de chauffage électrique ainsi que son procédé de fabrication

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EP (1) EP3503671B1 (fr)
CN (1) CN109963362B (fr)
DE (1) DE102017223779A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3191655B2 (ja) * 1996-01-26 2001-07-23 松下電器産業株式会社 正特性サーミスタ発熱体
CN2427945Y (zh) * 2000-03-10 2001-04-25 巫嘉雄 新型陶瓷电热栅
TWI251320B (en) * 2003-07-04 2006-03-11 Fuji Polymer Ind Thermal conductive composition, a heat-dissipating putty sheet and heat-dissipating structure using the same
ES2303712T3 (es) 2005-09-23 2008-08-16 CATEM GMBH & CO. KG Elemento generador de calor para un dispositivo de calefaccion.
EP2211589A1 (fr) * 2009-01-23 2010-07-28 Behr GmbH & Co. KG Caloporteur
EP2397788A1 (fr) * 2010-06-17 2011-12-21 Behr GmbH & Co. KG Caloporteur et procédé de fabrication d'un tel caloporteur
EP2730854B1 (fr) * 2012-11-12 2015-06-03 Betacera Inc. Chauffage du compartiment intérieur de voiture
EP3101365B1 (fr) * 2015-06-02 2019-12-04 Eberspächer catem GmbH & Co. KG Procédé de fabrication d'un dispositif de chauffage électrique
EP3101364B1 (fr) * 2015-06-02 2017-08-30 Eberspächer catem GmbH & Co. KG Dispositif de chauffage électrique

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CN109963362B (zh) 2022-01-18
EP3503671A1 (fr) 2019-06-26
CN109963362A (zh) 2019-07-02
DE102017223779A1 (de) 2019-06-27

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