EP0234608A1 - Procédé de fabrication d'un élément chauffant auto-régulateur - Google Patents

Procédé de fabrication d'un élément chauffant auto-régulateur Download PDF

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Publication number
EP0234608A1
EP0234608A1 EP87200052A EP87200052A EP0234608A1 EP 0234608 A1 EP0234608 A1 EP 0234608A1 EP 87200052 A EP87200052 A EP 87200052A EP 87200052 A EP87200052 A EP 87200052A EP 0234608 A1 EP0234608 A1 EP 0234608A1
Authority
EP
European Patent Office
Prior art keywords
elastomer
layer
solution
resistance
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.)
Granted
Application number
EP87200052A
Other languages
German (de)
English (en)
Other versions
EP0234608B1 (fr
Inventor
André Marcel Alfred Van Bokestal
Henri Louis Lorrain
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of EP0234608A1 publication Critical patent/EP0234608A1/fr
Application granted granted Critical
Publication of EP0234608B1 publication Critical patent/EP0234608B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the invention relates to a method for producing a self-regulating heating element which, as a heat source, has at least one resistance body made of a material with a positive temperature coefficient of the electrical resistance (also referred to as PTC resistance).
  • Such a heating element is known from DE-PS 26 14 433, which is characterized in that the resistance body or the resistance bodies lies or lie between metal bodies, on the inner wall of a casing on the side facing away from the resistance body or the resistance bodies in heat-exchanging contact.
  • the covering can consist of glass, ceramic or a thermally highly conductive elastic plastic, if desired in a metal outer covering.
  • DE-PS 26 41 894 The material which has been tried and tested in practice is described in DE-PS 26 41 894 and consists of a vulcanized plastic which is stable at the highest operating temperature of the element, an electrically insulating heat-conducting metal compound and, if desired, another filler.
  • the vulcanized plastic is preferably silicone rubber.
  • Magnesium oxide, trivalent iron oxide or aluminum oxide can be used as the heat-conducting metal compound and silicon dioxide as the filler.
  • Pressing the mating parts of the casing, one part of which is pushed into the other, or pressing a pressed part with a second material, are processes which are practically difficult to carry out and which cannot be automated.
  • Another possibility is to wrap the whole thing from PTC resistors with the enveloping metal parts in an insulating plastic film, for example made of polymid, before this whole thing is pushed into the pressed casing. This process is also complex.
  • the method according to the invention is characterized in that a layer of an elastomer is applied by means of a solution on the inside and / or outside of a covering produced by the pressing method.
  • the elastomer is applied by means of a solution in the form of a layer.
  • the elastomer preferably has a viscosity that is higher than that of the pressed part and varies from 200 mPa / s to 1,000,000 mPa / s. This means that the layer has a higher elasticity than the pressed part.
  • the elastomer may be of a two-component addition polymerized silicone resin type or a condensation polymerized elastomer type.
  • a solution in a simple solvent or a mixture of solvents is assumed, which is allowed to evaporate after the application.
  • Fillers such as metal oxides, which have a higher thermal conductivity, dyes or stabilizers can also be added to the solution of the elastomer.
  • a layer on the outside of the ge pressed part must be attached, this can be done in the immersion process.
  • An inner layer is obtained by filling the pressed part with the relevant material and then emptying it again, a layer forming on the walls. It is usually advisable to vibrate the solution during contact so that a layer with a constant thickness is obtained. After the attachment, it is dried and heated so that it is polymerized further.
  • the method according to the invention offers many advantages; the transport of the pressed casing to a filling device or to an immersion device can be easily automated. Furthermore, the diameter of the element can be reduced to less than 8 mm, which gives it a practically interesting range of dimensions. In addition, if the pressed part of the casing breaks due to a defect, the more elastic second casing attached by means of a liquid remains effective and loosens locally from the pressed part during the crack, so that no current-carrying metal parts are released.
  • 1 and 2 are 1 and 2 resistance bodies with a positive temperature gradient of the resistance. These resistance bodies are clamped between two semi-cylindrical metal bodies 3 and 4, which consist for example of aluminum.
  • Fig. 3 shows a heating element corresponding to Fig. 1, but in which the layer 5 on the inside of the pressed part has been replaced by a similar layer 9 on the outside thereof.

Landscapes

  • Resistance Heating (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Surface Heating Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP87200052A 1986-01-23 1987-01-16 Procédé de fabrication d'un élément chauffant auto-régulateur Expired - Lifetime EP0234608B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8600142A NL8600142A (nl) 1986-01-23 1986-01-23 Werkwijze voor de vervaardiging van een zelf-regelend verhittingselement.
NL8600142 1986-01-23

Publications (2)

Publication Number Publication Date
EP0234608A1 true EP0234608A1 (fr) 1987-09-02
EP0234608B1 EP0234608B1 (fr) 1992-09-02

Family

ID=19847454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87200052A Expired - Lifetime EP0234608B1 (fr) 1986-01-23 1987-01-16 Procédé de fabrication d'un élément chauffant auto-régulateur

Country Status (8)

Country Link
US (1) US4835370A (fr)
EP (1) EP0234608B1 (fr)
JP (1) JPS62172683A (fr)
KR (1) KR870007641A (fr)
CA (1) CA1281532C (fr)
DE (1) DE3781426D1 (fr)
DK (1) DK28887A (fr)
NL (1) NL8600142A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3101999A1 (fr) * 2015-06-02 2016-12-07 Eberspächer catem GmbH & Co. KG Élement de chauffage a coefficient de temperature positif (ctp) et dispositif de chauffage electrique pour un vehicule automobile comprenant un tel element de chauffage ctp

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687064A (en) * 1986-03-24 1987-08-18 Rjm, Inc. Green peanut harvester
US5414241A (en) * 1992-05-11 1995-05-09 Sekisui Kaseihin Kogyo Kabushiki Kaisha Heater, a method of manufacturing the same, and an anti-condensation mirror incorporating the same
DE9309071U1 (de) * 1993-06-17 1993-08-19 Fritz Eichenauer Gmbh & Co Kg, 76870 Kandel Elektrisches Widerstandsheizelement
JPH0773958A (ja) * 1993-09-03 1995-03-17 Texas Instr Japan Ltd 加熱装置
US5586214A (en) * 1994-12-29 1996-12-17 Energy Convertors, Inc. Immersion heating element with electric resistance heating material and polymeric layer disposed thereon
EP1467599B1 (fr) * 2003-04-12 2008-11-26 Eichenauer Heizelemente GmbH & Co.KG Dispositif pour l'admission des éléments de chauffe en céramique et procédé pour la production de tels
DE10316908A1 (de) * 2003-04-12 2004-10-21 Eichenauer Heizelemente Gmbh & Co. Kg Heizvorrichtung
KR100609452B1 (ko) * 2005-05-20 2006-08-03 모딘코리아 유한회사 피티씨 로드 조립체 및 이를 포함하는 차량용 프리히터
US20100200569A1 (en) * 2009-02-12 2010-08-12 Tom Richards, Inc. Controlled force ptc heater
CN101945505A (zh) * 2010-08-31 2011-01-12 上海吉龙经济发展有限公司 一种双重水路密封的ptc加热器
US20120217233A1 (en) * 2011-02-28 2012-08-30 Tom Richards, Inc. Ptc controlled environment heater
US20120248092A1 (en) * 2011-03-30 2012-10-04 Palo Alto Research Center Incorporated Low temperature thermistor process
DE102012107600B4 (de) * 2012-08-20 2015-10-08 Borgwarner Ludwigsburg Gmbh Elektrische Heizvorrichtung zum Beheizen von Fluiden
KR102476376B1 (ko) * 2017-08-31 2022-12-12 현대자동차주식회사 전기차량의 냉각수 가열장치
DE102018101453A1 (de) * 2018-01-23 2019-07-25 Borgwarner Ludwigsburg Gmbh Heizvorrichtung und Verfahren zum Herstellung eines Heizstabes
CN209689202U (zh) * 2019-03-25 2019-11-26 上海荣威塑胶工业有限公司 Ptc液体加热装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1191732A (en) * 1966-05-18 1970-05-13 Elpag Ag Chur Treating Stainless Chrome-Nickel Steel Surfaces of Tubular Electrical Heaters
DE1765622A1 (de) * 1968-06-20 1971-09-02 Tuerk & Hillinger Kg Elektrisches Heizkabel und Verfahren zu seiner Herstellung
FR2292395A1 (fr) * 1974-11-20 1976-06-18 Matsushita Electric Ind Co Ltd Generateur de chaleur scelle thermostatique
EP0008235A2 (fr) * 1978-08-10 1980-02-20 Eaton Corporation Compositions de polymères semi-conductrices aptes à être utilisées dans des dispositifs de chauffage électrique; câbles flexibles de chauffage fabriqués en utilisant lesdites compositions et procédé pour la fabrication de tels câbles
GB2064928A (en) * 1979-12-03 1981-06-17 Eichenauer Gmbh & Co Kg F Electrical resistance heating element
DE3104608A1 (de) * 1980-03-27 1982-01-07 Walther Dr. 1190 Wien Menhardt Selbstregelndes heizelement mit einem widerstands-heizkoerper aus stromleitendem keramikmaterial
FR2496382A1 (fr) * 1980-12-13 1982-06-18 Fudickar Kg C S Dispositif de chauffage electrique, notamment pour elements chauffants, appareils menagers ou plateaux de presses, et procede de fabrication
EP0057172A2 (fr) * 1981-01-26 1982-08-04 Walther Dr. Menhardt Elément chauffant auto-régulateur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3233028A (en) * 1960-04-27 1966-02-01 Erie Technological Prod Inc Method of making a capacitor
NL7504083A (nl) * 1975-04-07 1976-10-11 Philips Nv Zelfregelend verwarmingselement.
NL7511173A (nl) * 1975-09-23 1977-03-25 Philips Nv Zelfregelend verwarmingselement.
US4086467A (en) * 1976-07-19 1978-04-25 Texas Instruments Incorporated Electronic heater for high voltage applications
JPS5315640A (en) * 1976-07-28 1978-02-13 Hitachi Heating Appliance Co Ltd Heating unit
US4330929A (en) * 1979-12-06 1982-05-25 Siemens Corporation Process for making an electrical component having a metallic casing with a conformable plastic coating

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1191732A (en) * 1966-05-18 1970-05-13 Elpag Ag Chur Treating Stainless Chrome-Nickel Steel Surfaces of Tubular Electrical Heaters
DE1765622A1 (de) * 1968-06-20 1971-09-02 Tuerk & Hillinger Kg Elektrisches Heizkabel und Verfahren zu seiner Herstellung
FR2292395A1 (fr) * 1974-11-20 1976-06-18 Matsushita Electric Ind Co Ltd Generateur de chaleur scelle thermostatique
EP0008235A2 (fr) * 1978-08-10 1980-02-20 Eaton Corporation Compositions de polymères semi-conductrices aptes à être utilisées dans des dispositifs de chauffage électrique; câbles flexibles de chauffage fabriqués en utilisant lesdites compositions et procédé pour la fabrication de tels câbles
GB2064928A (en) * 1979-12-03 1981-06-17 Eichenauer Gmbh & Co Kg F Electrical resistance heating element
DE3104608A1 (de) * 1980-03-27 1982-01-07 Walther Dr. 1190 Wien Menhardt Selbstregelndes heizelement mit einem widerstands-heizkoerper aus stromleitendem keramikmaterial
FR2496382A1 (fr) * 1980-12-13 1982-06-18 Fudickar Kg C S Dispositif de chauffage electrique, notamment pour elements chauffants, appareils menagers ou plateaux de presses, et procede de fabrication
EP0057172A2 (fr) * 1981-01-26 1982-08-04 Walther Dr. Menhardt Elément chauffant auto-régulateur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3101999A1 (fr) * 2015-06-02 2016-12-07 Eberspächer catem GmbH & Co. KG Élement de chauffage a coefficient de temperature positif (ctp) et dispositif de chauffage electrique pour un vehicule automobile comprenant un tel element de chauffage ctp

Also Published As

Publication number Publication date
JPS62172683A (ja) 1987-07-29
CA1281532C (fr) 1991-03-19
US4835370A (en) 1989-05-30
NL8600142A (nl) 1987-08-17
EP0234608B1 (fr) 1992-09-02
DE3781426D1 (de) 1992-10-08
DK28887A (da) 1987-07-24
KR870007641A (ko) 1987-08-20
DK28887D0 (da) 1987-01-20

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