EP0026457B1 - Dispositif de chauffage avec élément chauffant utilisant une résistance CTP - Google Patents

Dispositif de chauffage avec élément chauffant utilisant une résistance CTP Download PDF

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Publication number
EP0026457B1
EP0026457B1 EP80105756A EP80105756A EP0026457B1 EP 0026457 B1 EP0026457 B1 EP 0026457B1 EP 80105756 A EP80105756 A EP 80105756A EP 80105756 A EP80105756 A EP 80105756A EP 0026457 B1 EP0026457 B1 EP 0026457B1
Authority
EP
European Patent Office
Prior art keywords
heating element
aluminium oxide
heating device
plates
plate
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
Application number
EP80105756A
Other languages
German (de)
English (en)
Other versions
EP0026457A2 (fr
EP0026457A3 (en
Inventor
Peter Dipl.-Phys. Kleinschmidt
Hans Dr. Meixner
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT80105756T priority Critical patent/ATE5122T1/de
Publication of EP0026457A2 publication Critical patent/EP0026457A2/fr
Publication of EP0026457A3 publication Critical patent/EP0026457A3/de
Application granted granted Critical
Publication of EP0026457B1 publication Critical patent/EP0026457B1/fr
Expired legal-status Critical Current

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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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/141—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
    • 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
    • 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

Definitions

  • the invention relates to a heating device with a PTC (ceramic PTC) heating element, as specified in the preamble of claim 1.
  • PTC semiconductor PTC
  • DE-A-2 743 880 describes a heating device with an optimized heating element made of thermistor material.
  • the PTC thermistor heating element has an essential feature a thickness of only 0.5 to 2 mm with a specific electrical resistance of the PTC thermistor material kept in a relatively narrow range, which must also have a Curie temperature that is at least 50 ° C higher than the shutdown temperature provided for the heater. This switch-off temperature is z. B. for boiling water 100 ° C (373 K).
  • Another important feature of a heating device according to the above-mentioned DE-OS is that the heat dissipation is as large as possible on both sides of the plate of the PTC thermistor heating element. The same size of heat dissipation on both sides takes precedence over extremely good heat dissipation on only one side.
  • a heating device with a semiconductor heating element with a positive temperature coefficient is known, in which the heating element is also a plate.
  • the other parts of this heating device lying on and under this plate, and in particular the necessary electrode sheets, are only in contact with the heating element in this device and are held as a complete package by the housing in a tight bond.
  • connection units are provided whose respective base part can be soldered to the respective connection of the heating element.
  • This simplification is also intended to include the attachment of the connecting lugs, which likewise have to be attached in a technologically less complex manner.
  • the present invention is based on the consideration of providing the manufacturer of devices with electrical heating devices with a PTC heating device of this type, which is, for example, a wire heater with the electrically insulating body around it.
  • a PTC heating device of this type which is, for example, a wire heater with the electrically insulating body around it.
  • the connecting lugs led outwards are at a distance from one another which complies with the VDE regulations, because in the case of the disk-shaped thermistor heating elements, the two electrodes located on the upper sides of the PTC thermistor disk are only a maximum of 2 mm apart .
  • the electrical connection lugs of the sandwich are at a sufficiently large distance from one another without losing the advantage of the small volume of the PTC thermistor heating element for comparatively high heating power.
  • the upper plate made of sintered aluminum oxide which is visible in the perspective view, is designated by 2. Such a sintered body has high mechanical strength.
  • the frame made of plastic material is designated by 12, with which a tight, in particular liquid-tight, connection is made between the upper and the lower aluminum oxide plate (not visible in FIG. 1).
  • This frame runs around the whole sandwich.
  • 21 and 22 are the connecting lugs for the supply of the operating voltage, for. B. 220 volt mains voltage.
  • the required minimum distance from one another can be maintained without difficulty after a sandwich as shown in FIG. B. 500 watt heating power (for a switch-off temperature of z. B. 100 ° C) has dimensions in the order of 35 times 35 mm.
  • FIG. 1 Details of the structure of a sandwich of FIG. 1 go from the sectional view of the Fig. 2 shows, in which the PTC heating element according to the aforementioned DE-OS is designated by 1.
  • the upper and lower aluminum oxide plates are designated by 2.
  • This not only has a relatively high ductility, but also a melting point that is sufficiently above the temperature to which the PTC heating element can heat up to a maximum (beyond its Curie temperature).
  • the edges of the two aluminum oxide plates 2 are connected to one another. It is also advantageous to produce the frame 12 by means of an injection molding process, specifically directly on the sandwich, wherein the space between the heating element 1 and the frame 12 visible in FIG. 2 can also be practically completely filled. However, it is advisable to leave a space for the heating element 1, even if only extremely small, for lateral thermal expansion, provided that the plastic is not sufficiently elastic in any case.
  • the already mentioned layers 4 made of a ductile solder not only serve as elastic cushion in principle known per se for another type of installation, namely with the application of pressure, but the solder layers 4 also have the important function of mechanical cohesion here.
  • the heating element 1 has on its plate sides 11 a full-area, solderable metallization made of z. B. baking silver, and the respective opposite surfaces of the aluminum oxide plates 2 are metallized at least up to the size of the surface of the heating element.
  • a metallization layer for the alumina plates can e.g. B. also from stoving silver or z. B. consist of plasma or flame sprayed copper, aluminum, zinc.
  • FIG. 2 is a section according to 11-11 of FIG. 1, so that only the connecting lug 22 can be seen in the illustration in FIG. 2. This is guided through the frame 12 and electrically connected on the inside of the sandwich to the metallization of the one aluminum oxide plate 2. In particular, this terminal lug 22 is soldered on. For this purpose, it can be provided that the metallization of the aluminum oxide plate only extends beyond the edge of the heating element at the relevant point.
  • the connecting lug 21 which is not visible in FIG. 2, is arranged and electrically connected to that in FIG. 2 and to the metallization of the lower aluminum oxide plate 2 in FIG. 2.
  • a thickness between 0.5 and 2 mm is recommended for the aluminum oxide plates 2. Such a small thickness results in only little thermal resistance with an already good thermal conductivity of the A1 2 0 3 .
  • This metallization 11 is preferably produced from stoving silver in the form of a double layer.
  • a first layer of baked-on silver In-Ga-Ag alloy No. E 4106, Demetron
  • a silver branding tincture. No. E 4100, Demetron
  • This double layer of stoving silver is ideal for the further soldering process.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Electronic Switches (AREA)
  • Semiconductor Integrated Circuits (AREA)

Claims (7)

1. Dispositif de chauffage comprenant un élément chauffant à résistance à coefficient de température positif, qui est métallisé sur ses surfaces formant plaques et qui est agencé en sandwich, des plaques en alumine frittée étant appliquées sur les deux surfaces formant plaques de l'élément chauffant, caractérisé en ce que pour un sandwich d'une seule pièce (fig. 1) les surfaces des plaques en alumine (2) qui sont respectivement en regard des surfaces formant plaques (11) sont métallisées de manière à pouvoir être brasées, en ce qu'entre ces surfaces formant plaques (11) et ces surfaces métallisées sont prévues respectivement des couches (4) en matière à braser ductile, par lesquelles l'élément chauffant (1) et les plaques en alumine (2) sont brasés l'un aux autres sur toute la surface et en ce que les barrettes de connexion (22, 23) sont brasées sur les plaques d'alumine (2) par la matière à braser.
2. Dispositif de chauffage suivant la revendication 1, caractérisé en ce que la couche (4) en matière à braser ductile est maintenue à une épaisseur d'au moins 0,1 mm.
3. Dispositif de chauffage suivant la revendication 1 ou 2, caractérisé en ce que les plaques d'alumine (2) dépassent suffisamment du bord de l'élément chauffant à résistance à coefficient de température positif (1).
4. Dispositif de chauffage suivant la revendication 1, 2 ou 3, caractérisé en ce que les bords des plaques d'alumine (2) sont reliés entre eux par un cadre (12) sans fin.
5. Dispositif de chauffage suivant les revendication 1 à 4, caractérisé en ce que l'espace disponible ménagé par les bords des plaques d'alumine (2) en saillie de l'élément chauffant à résistance à coefficient de température positif est empli d'une matière plastique du cadre (12) résistant à la chaleur.
6. Dispositif de chauffage suivant les revendications 1 à 5, caractérisé en ce que le cadre (12) est fabriqué par injection de matière plastique.
7. Dispositif de chauffage suivant les revendications 1 à 6, caractérisé en ce que, quand on utilise de la pâte d'argent cuite pour la métallisation des surfaces formant plaques (11) de l'élément chauffant (1), la plaque (1) est recuite entre 300 et 400°C pendant 12 heures environ après le dépôt des couches de pâte d'argent cuite.
EP80105756A 1979-09-28 1980-09-24 Dispositif de chauffage avec élément chauffant utilisant une résistance CTP Expired EP0026457B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105756T ATE5122T1 (de) 1979-09-28 1980-09-24 Heizeinrichtung mit kaltleiter-heizelement.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2939505 1979-09-28
DE2939505 1979-09-28

Publications (3)

Publication Number Publication Date
EP0026457A2 EP0026457A2 (fr) 1981-04-08
EP0026457A3 EP0026457A3 (en) 1981-04-15
EP0026457B1 true EP0026457B1 (fr) 1983-10-19

Family

ID=6082213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105756A Expired EP0026457B1 (fr) 1979-09-28 1980-09-24 Dispositif de chauffage avec élément chauffant utilisant une résistance CTP

Country Status (5)

Country Link
EP (1) EP0026457B1 (fr)
JP (1) JPS5657289A (fr)
AT (1) ATE5122T1 (fr)
DE (1) DE3065380D1 (fr)
ES (1) ES8105914A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7667166B2 (en) 2005-09-23 2010-02-23 Catem Gmbh & Co. Kg Heat-generating element of a heating device
US20200163161A1 (en) * 2017-05-05 2020-05-21 Eltek S.P.A. Electrical heating device, in particular with ptc effect

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531595B1 (fr) * 1982-08-03 1985-06-07 Thomson Csf Dispositif de rechauffage utilisable sur un capteur d'incidence aerodynamique
DE3583932D1 (de) * 1984-12-18 1991-10-02 Matsushita Electric Ind Co Ltd Selbstregelnder heizartikel mit elektroden welche direkt mit einer ptc-schicht verbunden sind.
DE4405040C2 (de) * 1994-02-17 1997-09-25 Marcel Peter Hofsaes Elektrisches Heizgerät
HU1068U (en) * 1996-12-09 1997-05-28 Fujas Heating element
JP2005040408A (ja) 2003-07-24 2005-02-17 Olympus Corp 発熱素子
ES2360884T3 (es) * 2005-09-23 2011-06-10 EBERSPÄCHER CATEM GMBH & CO. KG Elemento generador de calor de un dispositivo de calefacción.
ES2303712T3 (es) 2005-09-23 2008-08-16 CATEM GMBH & CO. KG Elemento generador de calor para un dispositivo de calefaccion.
US7576305B2 (en) 2006-09-22 2009-08-18 Catem Gmbh & Co. Kg Heat-generating element of a heating device
ES2322492T3 (es) 2006-10-25 2009-06-22 EBERSPACHER CATEM GMBH & CO. KG Elemento generador de calor para un dispositivo calefctor y procedimiento de fabricacion del mismo.
US9839072B2 (en) 2012-03-08 2017-12-05 Eberspacher Catem Gmbh & Co. Kg Heat generating element with connection structure
EP2637474B1 (fr) * 2012-03-08 2016-08-17 Eberspächer catem GmbH & Co. KG Elément chauffant
EP2637475B9 (fr) * 2012-03-08 2017-01-25 Eberspächer catem GmbH & Co. KG Elément chauffant
EP3273177B1 (fr) 2016-07-18 2020-09-09 Eberspächer catem GmbH & Co. KG Dispositif de chauffage électrique
DE102016224296A1 (de) * 2016-12-06 2018-06-07 Eberspächer Catem Gmbh & Co. Kg Elektrische heizvorrichtung
FR3073116A1 (fr) * 2017-10-30 2019-05-03 Valeo Systemes Thermiques Unite de chauffage comprenant un bloc chauffant surmoule par un element d'etancheite
EP3584808B1 (fr) 2018-06-18 2021-10-06 Mahle International GmbH Module de chauffage ptc destiné à chauffer un fluide
DE102019204665A1 (de) 2019-03-06 2020-09-10 Eberspächer catem Hermsdorf GmbH & Co. KG PTC-Heizelement und eine elektrische Heizvorrichtung
DE102020202508A1 (de) 2020-02-27 2021-09-02 Eberspächer catem Hermsdorf GmbH & Co. KG PTC Heizeinrichtung
DE102020113124A1 (de) * 2020-05-14 2021-11-18 Eberspächer catem Hermsdorf GmbH & Co. KG PTC-Heizzelle und Verfahren zu deren Herstellung
DE102020208643A1 (de) * 2020-07-09 2022-01-13 Eberspächer Catem Gmbh & Co. Kg Heizzelle und PTC-Heizeinrichtung umfassend eine solche
DE102020120472A1 (de) * 2020-08-04 2022-02-10 Eberspächer catem Hermsdorf GmbH & Co. KG Verfahren zur Herstellung eines PTC-Heizelements und PTC-Heizelement
DE102020120473A1 (de) * 2020-08-04 2022-02-10 Eberspächer catem Hermsdorf GmbH & Co. KG Verfahren zur Herstellung eines PTC-Heizelements und PTC-Heizelement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619242A1 (de) * 1976-04-30 1977-11-10 Murata Manufacturing Co Heizvorrichtung mit einem halbleiter-heizelement mit positivem temperaturkoeffizienten
US4091267A (en) * 1976-07-19 1978-05-23 Texas Instruments Incorporated Self-regulating electric heater
DE2804749C3 (de) * 1978-02-04 1980-07-31 Fa. Fritz Eichenauer, 6744 Kandel Durchlauferhitzer
DE2835742A1 (de) * 1978-08-16 1980-02-28 Bosch Siemens Hausgeraete Heizeinrichtung mit einem heizelement aus kaltleitermaterial
DE2845965C2 (de) * 1978-10-21 1983-01-20 Fritz Eichenauer GmbH & Co KG, 6744 Kandel Elektrisches Widerstandsheizelement
DE2901711A1 (de) * 1979-01-17 1980-07-31 Siemens Ag Elektrodenbeschichtung fuer kaltleiter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7667166B2 (en) 2005-09-23 2010-02-23 Catem Gmbh & Co. Kg Heat-generating element of a heating device
US20200163161A1 (en) * 2017-05-05 2020-05-21 Eltek S.P.A. Electrical heating device, in particular with ptc effect

Also Published As

Publication number Publication date
ATE5122T1 (de) 1983-11-15
ES495391A0 (es) 1981-06-16
DE3065380D1 (en) 1983-11-24
EP0026457A2 (fr) 1981-04-08
ES8105914A1 (es) 1981-06-16
JPS5657289A (en) 1981-05-19
EP0026457A3 (en) 1981-04-15

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