EP0521181B1 - Elément chauffant à PTC - Google Patents

Elément chauffant à PTC Download PDF

Info

Publication number
EP0521181B1
EP0521181B1 EP91111056A EP91111056A EP0521181B1 EP 0521181 B1 EP0521181 B1 EP 0521181B1 EP 91111056 A EP91111056 A EP 91111056A EP 91111056 A EP91111056 A EP 91111056A EP 0521181 B1 EP0521181 B1 EP 0521181B1
Authority
EP
European Patent Office
Prior art keywords
insulating frame
ptc element
electrode plate
electrode plates
pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91111056A
Other languages
German (de)
English (en)
Other versions
EP0521181A1 (fr
Inventor
Franz Bohlender
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.)
DBK David and Baader GmbH
Original Assignee
DBK David and Baader GmbH
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 DBK David and Baader GmbH filed Critical DBK David and Baader GmbH
Priority to DE59107483T priority Critical patent/DE59107483D1/de
Priority to EP91111056A priority patent/EP0521181B1/fr
Priority to ES91111056T priority patent/ES2086434T3/es
Publication of EP0521181A1 publication Critical patent/EP0521181A1/fr
Application granted granted Critical
Publication of EP0521181B1 publication Critical patent/EP0521181B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/144—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals or tapping points being welded or soldered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient

Definitions

  • the present invention relates to a PTC heater according to the preamble of claim 1.
  • a PTC heater is known from DE-A-30 42 420.
  • Such radiators usually have several flat heating elements.
  • the heating elements consist of a positioning frame made of insulating material, which has several openings in which form-adapted PTC elements are arranged.
  • the positioning frame is covered on both sides by electrode plates, so that the PTC elements are in contact with both electrode plates and are prevented from falling out of the openings.
  • voltage is applied to the electrode plates, a current flows through the PTC elements, as a result of which they are heated and can be used to heat their surroundings.
  • a problematic point in the production of such radiators or heating elements is the connection between the electrode plates with the position or insulating frame. With a number of previously known heating elements, this is achieved by means of suitable, attached clamping devices.
  • the attachment of the electrode plates to the positioning or insulating frame is achieved by means of connecting lugs formed on the electrode plates, which are inserted through openings in the positioning frame and bent over on the other side of the positioning frame.
  • Electrode plates on the positioning frame is that the electrode plates must be made of a relatively strong sheet metal, so that the connecting lugs formed on the electrode plate and having the same sheet thickness are sufficiently strong so that one by bending the connecting lugs on the other side of the positioning frame permanent and firm connection can be achieved.
  • high sheet thicknesses for the electrode plates are undesirable because they hinder the heat conduction between the heating PTC elements and the environment.
  • Another disadvantage of attaching the electrode plates to the positioning or insulating frame by means of connecting lugs is the great outlay for assembly. The connecting lugs can easily bend when the electrodes are joined to the position frame, so that manual, time-consuming re-erection of the connecting lugs is necessary.
  • the object of the present invention is therefore to provide a PTC radiator in which a permanent, firm connection between the electrodes and the insulating frame can be produced in a simple and automation-appropriate manner.
  • the invention provides a PTC heating element in which, in addition to a firm and permanent connection between the electrode plates and the insulating frame, which can be produced easily and in a manner suitable for automation, electrode plates of very low thickness can be used.
  • the present invention has the advantage of a particularly simple type of connector.
  • the plug connection is formed only by a pin formed on the insulating frame and an opening provided on the electrode plate, the diameters of which are dimensioned such that the pin sits in the opening of the electrode by means of a press fit.
  • This connector is extremely easy to manufacture and thereby lowers the manufacturing costs of the PTC radiator.
  • Another advantage is the simple assembly of the electrodes with the insulating frame, which makes it easy to automate the assembly, which in turn lowers the manufacturing costs for the PTC radiator.
  • the danger can be eliminated that the electrodes are inadvertently short-circuited if the insulating frame does not have a bore connecting its opposite sides, which could cause a short-circuit.
  • the subject matter of claim 1 also has the advantage of an automation-appropriate and therefore cost-reducing connection possibility of the electrode plates with the insulating frame.
  • a particular advantage of this embodiment can be seen in the fact that the plug connection is completely flat, ie without elevations on the side of the electrode plate facing away from the insulating frame. As a result, the electrode can lie evenly on the body to be heated, so that good heat coverage is ensured.
  • the embodiment of the present invention according to the features of claim 3 has the advantage that the hollow pins are easy to manufacture and can be easily expanded by means of an embossing mandrel inserted from the opposite side of the insulating frame.
  • the embodiment of the present invention according to the features of claims 4 and 8 in which the electrodes are made of sheet metal strips with a thickness of less than 0.2 mm, preferably 0.1 mm, has the advantage that the electrodes, due to low thickness have a particularly good thermal conductivity.
  • the embodiment of the invention according to the features of claim 7 has the advantage that through the opening designed as a slot, the electrodes are firmly connected to the insulating frame, but can expand freely when heated, so that no tension and in particular, the electrodes are not bent open, as a result of which the contact between the PTC elements and the electrodes could deteriorate.
  • each electrode reliably closes the openings covered by it, so that falling out of the PTC elements, even if they are very small, is reliably prevented.
  • the PTC heater has an insulating frame 1 with openings 2 and shape-adapted PCT resistance elements 3 used therein on.
  • the flat insulating frame is surrounded on both sides by electrodes 4 and 4a, so that the PTC elements are held securely between the electrode plates 4 and 4a and are in contact with them.
  • the electrode plates 4 and 4a are firmly connected to the insulating frame 1 by means of plug connections 5.
  • the plug connections consist of pins 6 and 6 'and openings 7 and 7'.
  • One of the electrode plates shown in FIG. 1 could also be designed in two pieces to achieve three heating levels. A first heating level would then correspond to heating only one PTC element, a second heating level to heating the other PTC element and a third heating level to heating both PTC elements simultaneously.
  • the two-part electrode plate could be formed by two of the shorter electrode plates shown in FIG. 2.
  • the pins are integrally formed on the electrode plates.
  • the pins are inserted into the openings 7, which are dimensioned such that each electrode is press-fitted to the insulating frame.
  • Each electrode is attached to the insulating frame with at least two such plug connections.
  • each electrode plate is connected to the insulating frame at as many points as is necessary to hold the PTC elements securely in the openings.
  • FIGS. 3a and 3b show one possibility of how the pins can be manufactured extremely easily and in a manner suitable for automation.
  • a cross slot 8 is punched in at the point where the pin is to be provided.
  • the triangular, punched tongues 9 are then placed perpendicular to the electrode plate by means of a stamp, so that the pin 6 is formed.
  • the insulating frame expediently has a bore with a profile according to FIG. 4.
  • Fig. 4 shows a cross section through a plug connection 5 on the insulating frame. It can be seen that the bore of the opening 7 has a larger diameter in the outer regions than in the inner region of the bore.
  • the pin 6 of the electrode 4 or 4a has a diameter which corresponds approximately to the diameter of the narrowed point 10 of the opening 7.
  • the plug connections shown in FIGS. 1 and 4 have the advantage that after the electrode plate has been fastened to the insulating frame, no elevations occur on the surface of the electrode plate facing away from the insulating frame.
  • the PTC radiator can therefore lie flat on the body to be heated, which ensures good heat conduction.
  • each electrode plate 4 has cutouts 13 in the areas in which the openings for the respective other electrode plate are provided in the insulating frame. Such a recess is also necessary if the widening of the pegs shown in FIG. 4 is to be carried out with the aid of an embossing mandrel, since the widening of the pegs in one of the electrodes must not be blocked by the other electrode from access to the openings.
  • the electrode plates are preferably made of a spring-hard brass sheet with a thickness of less than 0.2 mm, but preferably of 0.1 mm. Such thin brass sheets have excellent thermal conductivity, so that the heat given off by the PTC elements can be passed on to the environment.
  • the pins 6 ' are not formed on the electrode plates 4 or 4a, but on the insulating frame 1 itself. Accordingly, the electrode plates 4 and 4a have openings 7 '.
  • the pins 6 'and the openings 7' are dimensioned with respect to one another in such a way that the electrodes are press-fitted to the insulating frame 1 by means of an interference fit are connected.
  • the openings 7 ' can also be designed as slots 7', so that a temperature-dependent expansion of the electrode plates to avoid mechanical stresses is made possible.
  • the cutouts can again be useful if one of the electrode plates is designed in two pieces in order to achieve three heating levels.
  • the recesses 13 enable the short electrodes arranged on a common side of the insulating frame to be arranged in a space-saving and contact-free manner so that they engage in the respective recess of the other electrode.
  • the electrode plates 4 and 4a can be connected to the electrical supply lines 15 by a crimp connection 14 provided integrally on the electrode plates.
  • a connection to the electrical lines 15 according to FIG. 1 is also possible via plugs 16 which are plugged onto tongues 17 formed on the electrode plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Resistance Heating (AREA)

Claims (9)

  1. Corps de chauffe à coefficient positif de température comprenant un cadre isolant (1), au moins deux plaques formant électrode (4, 4a) disposées sur les deux côtés du cadre isolant et reliées chacune de manière fixe au cadre isolant en au moins deux points, et au moins un élément à coefficient positif de température (3) inséré dans un perçage (2) du cadre isolant (1), situé entre les deux plaques formant électrode et en contact avec ces dernières, la fixation de chaque plaque formant électrode (4, 4a) étant réalisée en un point déterminé sur le cadre isolant (1) au moyen d'un assemblage à emboîtement (5) réalisé de manière intégrale sur le cadre isolant et la plaque formant électrode, caractérisé en ce que l'assemblage à emboîtement est constitué d'un téton (6) réalisé sur la plaque formant électrode (4, 4a) et d'un orifice (7) réalisé sur le cadre isolant, les diamètres du téton et de l'orifice étant dimensionnés l'un par rapport à l'autre de manière telle que le téton est logé dans l'orifice par ajustage serré.
  2. Corps de chauffe à coefficient positif de température selon la revendication 1, caractérisé en ce que l'orifice dans le cadre isolant (1) est formé par un perçage qui traverse complètement le cadre isolant et qui présente à l'intérieur du cadre isolant un diamètre rétréci (10) de manière telle que le téton (6) pénètre avec sa pointe par la zone rétrécie jusqu'à une zone plus large et est élargi dans cette position.
  3. Elément à coefficient positif de température selon la revendication 2, caractérisé en ce que le téton (6) est réalisé creux pour pouvoir mieux être élargi.
  4. Elément chauffant à coefficient positif de température selon l'une des revendications précédentes, caractérisé en ce que les plaques formant électrode (4, 4a) sont réalisées sous la forme de bandes de tôle d'une épaisseur inférieure à 0,2 mm, de préférence de 0,1 mm.
  5. Corps de chauffe à coefficient positif de température selon la revendication 4, caractérisé en ce que le téton est formé sur la bande de tôle par estampage d'une fente en croix (8) dans la bande de tôle et cambrage des languettes (9) triangulaires ainsi obtenues.
  6. Corps de chauffe à coefficient positif de température comprenant un cadre isolant (1), au moins deux plaques formant électrode (4,4a) disposées sur les deux côtés du cadre isolant et reliées chacune de manière fixe au cadre isolant en au moins deux points, et au moins un élément à coefficient positif de température (3) inséré dans un perçage (2) du cadre isolant (1), situé entre les deux plaques formant électrode et en contact avec ces dernières, la fixation de chaque plaque formant électrode (4, 4a) étant réalisée en un point déterminé sur le cadre isolant (1) au moyen d'un assemblage à emboîtement (5) réalisé de manière intégrale sur le cadre isolant et la plaque formant électrode, caractérisé en ce que l'assemblage à emboîtement est constitué de son téton (6') réalisé sur le cadre isolant (1) et d'un orifice (7') réalisé sur la plaque formant électrode (4,4a), les diamètres du téton et de l'orifice étant dimensionnés l'un par rapport à l'autre de manière telle que le téton est logé dans l'orifice par ajustage serré.
  7. Corps de chauffe à coefficient positif de température selon la revendication 6, caractérisé en ce que l'orifice est réalisé sous forme de fente (7') pour permettre à la plaque formant électrode (4, 4a) de se dilater librement sous l'effet de la température.
  8. Corps de chauffe à coefficient positif de température selon la revendication 6 ou 7, caractérisé en ce que les plaques formant électrode (4,4a) sont réalisées sous forme de bandes de tôle d'une épaisseur inférieure à 0,2 mm, de préférence 0,1 mm.
  9. Corps de chauffe à coefficient positif de température selon l'une des revendications précédentes caractérisé en ce que chaque plaque formant électrode (4, 4a) est reliée au cadre isolant (1) par respectivement au moins un assemblage à emboîtement (5), devant les côtés frontaux de chaque perçage (2) recouvert par ladite plaque.
EP91111056A 1991-07-03 1991-07-03 Elément chauffant à PTC Expired - Lifetime EP0521181B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59107483T DE59107483D1 (de) 1991-07-03 1991-07-03 PTC-Heizkörper
EP91111056A EP0521181B1 (fr) 1991-07-03 1991-07-03 Elément chauffant à PTC
ES91111056T ES2086434T3 (es) 1991-07-03 1991-07-03 Dispositivo calentador de ptc.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91111056A EP0521181B1 (fr) 1991-07-03 1991-07-03 Elément chauffant à PTC

Publications (2)

Publication Number Publication Date
EP0521181A1 EP0521181A1 (fr) 1993-01-07
EP0521181B1 true EP0521181B1 (fr) 1996-02-28

Family

ID=8206895

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111056A Expired - Lifetime EP0521181B1 (fr) 1991-07-03 1991-07-03 Elément chauffant à PTC

Country Status (3)

Country Link
EP (1) EP0521181B1 (fr)
DE (1) DE59107483D1 (fr)
ES (1) ES2086434T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL121915A0 (en) * 1997-10-07 1998-03-10 Body Heat Ltd Immersible PTC heating device
ES2236991T3 (es) * 1999-06-15 2005-07-16 DAVID & BAADER DBK SPEZIALFABRIK ELEKTRISCHER APPARATE UND HEIZWIDERSTANDE GMBH Dispositivo de calefaccion destinado para el calentamiento de aire.
DE20121116U1 (de) * 2001-12-21 2003-04-24 Fritz Eichenauer GmbH & Co. KG, 76870 Kandel Elektrische Heizeinrichtung zum Beheizen einer Flüssigkeit in einem Kfz
DE102006013271B4 (de) 2006-03-21 2011-05-19 Rittal Gmbh & Co. Kg Kondensatverdunster
DE102016224296A1 (de) * 2016-12-06 2018-06-07 Eberspächer Catem Gmbh & Co. Kg Elektrische heizvorrichtung
DE102021112839B3 (de) 2021-05-18 2022-06-09 Ntt New Textile Technologies Gmbh Verfahren zur Herstellung einer Verbindung zwischen einer Elektrode und einem elektrischen Leiter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242567A (en) * 1978-06-05 1980-12-30 General Electric Company Electrically heated hair straightener and PTC heater assembly therefor
DE3042420A1 (de) * 1980-11-11 1982-06-24 Fritz Eichenauer GmbH & Co KG, 6744 Kandel Elektrischer heizkoerper mit ein oder mehreren flachen, quaderfoermigen heizelementen
DE3048452C2 (de) * 1980-12-22 1983-08-25 Kabelwerke Reinshagen Gmbh, 5600 Wuppertal Elektrische Heizvorrichtung
US4728779A (en) * 1985-09-27 1988-03-01 Tdk Corporation PTC heating device

Also Published As

Publication number Publication date
ES2086434T3 (es) 1996-07-01
EP0521181A1 (fr) 1993-01-07
DE59107483D1 (de) 1996-04-04

Similar Documents

Publication Publication Date Title
EP1391965B1 (fr) Borne à ressort pour conducteur électrique
EP1777720B1 (fr) Élément électrique, notamment support de relais, avec borne élastique et procédé de fabrication
EP2505931B2 (fr) Dispositif de chauffage électrique doté d'un élément plat comprenant des pistes conductrices et procédé de fabrication d'un tel élément plat
EP2866306B1 (fr) Prise de contact pour un connecteur à fiches électrique
EP0557744B1 (fr) Interrupteur thermique
DE19825971C1 (de) Elektrisches Steckverbindungsteil
DE2409075A1 (de) Elektrischer verbinder
DE69005126T2 (de) Elektrischer Steckerstift.
DE1217476B (de) Elektrische Vielfachsteckvorrichtung
WO2017182633A1 (fr) Contact enfichable
EP3375048A1 (fr) Contact à enficher
DE1765470C3 (de) Elektrischer Verbinder
DE10257759A1 (de) Elektrische Steckverbindung mit einem Gehäuse und einem Hochstromkontakt
EP3446367B1 (fr) Contact enfichable
EP0536523B1 (fr) Borne de connexion
EP0521181B1 (fr) Elément chauffant à PTC
DE102008014337A1 (de) Leiterplattenverbinder
WO2011131310A1 (fr) Prise de courant électrique
DE3433822C2 (fr)
DE69319259T2 (de) Verbesserte Kontakte für den Anschluss von Spulenwicklungen
DE4410951A1 (de) Flachfederkontakt für eine Steckverbindung und Verfahren zu seiner Herstellung
EP0285927B1 (fr) Thermostat
DE4241242A1 (de) Elektrischer Zustandsfühler
DE69821547T2 (de) Verfahren zur Herstellung von elektrischen Verbindern und Verbinder
EP1974417A1 (fr) Dispositif pour raccorder un élément de liaison

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19930125

17Q First examination report despatched

Effective date: 19940902

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

ITF It: translation for a ep patent filed

Owner name: STUDIO GLP S.R.L.

REF Corresponds to:

Ref document number: 59107483

Country of ref document: DE

Date of ref document: 19960404

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960426

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2086434

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20070720

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20070723

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20070718

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080829

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20080723

Year of fee payment: 18

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080703

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20080704

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080704

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100202