EP0054901B1 - Dispositif de chauffage électrique - Google Patents

Dispositif de chauffage électrique Download PDF

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Publication number
EP0054901B1
EP0054901B1 EP81110491A EP81110491A EP0054901B1 EP 0054901 B1 EP0054901 B1 EP 0054901B1 EP 81110491 A EP81110491 A EP 81110491A EP 81110491 A EP81110491 A EP 81110491A EP 0054901 B1 EP0054901 B1 EP 0054901B1
Authority
EP
European Patent Office
Prior art keywords
plate
ptc resistor
heating apparatus
opening
fastening member
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
EP81110491A
Other languages
German (de)
English (en)
Other versions
EP0054901A1 (fr
Inventor
Bernd Eder
Ekkehard Dipl.-Ing. Wösthoff
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.)
Kabelwerke Reinshagen GmbH
Original Assignee
Kabelwerke Reinshagen 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 Kabelwerke Reinshagen GmbH filed Critical Kabelwerke Reinshagen GmbH
Publication of EP0054901A1 publication Critical patent/EP0054901A1/fr
Application granted granted Critical
Publication of EP0054901B1 publication Critical patent/EP0054901B1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders

Definitions

  • the invention relates to an electrical heating device for heating a plate using a flat PTC resistor, which is designed as a flat, cylindrical ring.
  • Such heating devices have become known, for example, for the heating of exterior mirrors of motor vehicles, cf. the published documents of German utility models DE-GM7919839 and DE-GM 7929 548.
  • a PTC resistor is soldered on as a self-regulating heating element with a connecting electrode on a heat distribution plate.
  • the heat distribution plate there is connected to an electrical line via a soldering point, which is connected, for example, to the body (earth) of the motor vehicle.
  • the other connection electrode is also connected by soldering to an electrical line that leads to the switch that connects the heating circuit to the power supply of the motor vehicle.
  • the assembly of this PTC resistor and its connections is very complex due to the solder connections. The connections must be carried out carefully in order to achieve the lowest possible electrical and thermal contact resistance. In addition, long-term thermal stress cracks can occur in the solder joints.
  • Hollow cylindrical PTC resistors with current supply electrodes on both end faces can also be found in the prior art, see document DE-A-14 65 439 and FR-A-1 509 654. Also disc springs for contacting a flat, circular PTC resistors within a housing are known, compare DE-A 2540029. Here, however, the pressure forces depend on the dimensions of the housing.
  • the invention is based on the object of FR-A-1 509 654 to provide an electrical heating device of the type mentioned, the PTC resistor of which can be installed quickly and safely - that is to say without large electrical and thermal resistances.
  • the invention solves this problem in that the outer ring surfaces of the PTC resistor form the connecting electrodes, that a through opening is arranged in the plate to be heated, that the PTC resistor bears with its first connecting electrode around the opening on the plate and that a fastening member is pushed through the opening of the PTC resistor and through the opening of the plate, which presses the PTC resistor onto the plate.
  • the second connection electrode can be contacted in that the fastening member presses an annular, electrical contact part onto the second connection electrode of the PTC resistor.
  • An improved heat distribution at the PTC resistor is achieved in that the fastening member presses a perforated heat distribution plate onto the second connection electrode.
  • the contact part can either be designed as a heat distribution plate itself or the contact part is arranged between the PTC resistor and the heat distribution plate.
  • the fastening part can be formed in several parts and, for example, consist of a T-shaped spring part with a pin and a self-locking, slotted spring washer, the spring washer with the interposition of the plate, the PTC resistor and possibly the heat distribution plate and / or the contact part the pin is pushed on and the pushed-on parts are pressed against each other.
  • an elastic corrugated ring can be arranged between the pushed-on parts on the one hand and the spring washer on the other hand.
  • the invention requires neither solder connections for connecting the electrical lines to the electrodes of the PTC resistor nor for thermal contacting between the PTC resistor and the plate to be heated.
  • the assembly can largely be done mechanically. Larger tolerances in the dimensions, for example in the thicknesses, of the components involved can also be easily compensated for, so that there is always a sufficient contact force between the PTC resistor and the plate to be heated or the electrical connecting members.
  • the plate 1 to be heated can be a thin aluminum sheet and can be used, for example, to heat a motor vehicle exterior mirror in a known manner.
  • the plate 1 has a round through hole 2, and a plug tongue 3 for connection to the power supply.
  • Thermal compound 5 is applied to the ring surface 4 around the hole 2.
  • the PTC resistor 6 rests with an annular connection electrode 9 on the thermal paste 5.
  • An annular contact part 11 in the form of a brass disk with a tongue 12 is placed on the other annular connecting electrode 10.
  • the contact part 11 can be flat - as shown - or as a hood covering the PTC resistor, see with dash-dot lines at 11 ' indicates in FIG. 2.
  • a corrugated ring 13 is provided to ensure sufficient spring forces.
  • the actual fastening device is composed of a spring part 14 which is T-shaped in cross section and a slotted spring washer 15 which interacts with it and is known as a "fastener".
  • the spring part 14 consists of a heat-resistant plastic, for. B. glass fiber reinforced polycarbonate. It comprises a flat annular pressing part 14a and a hollow pin 14b.
  • the hollow pin 14b is stepped and formed with a conical transition 14c and a front projection 14d.
  • the slotted spring washer 15 is made from spring steel in a plate shape and has a central through opening 15a and a plurality of locking fingers 15b, which extend at an acute angle to the disk plane and are distributed on the inner circumference.
  • the assembly takes place in that the spring part 14 is placed with its pressing part 14a on a lower punch 16 or another solid base. Parts 1, 5, 6, 11 and 13 are now attached to the pin 14b. Then the spring washer 15 is placed on the chamfer 14d of the pin 14b; because the central opening 15a of the spring washer 15 is formed somewhat smaller than the diameter of the pin 14b in the area between the locking fingers 15b. Then the spring washer 15 is pushed onto the pin 14b with the aid of the upper punch 17. The locking fingers 15b bend and the corrugated ring 13 is compressed. After the desired contact pressure has been achieved, the upper punch 17 is moved back. The locking fingers 15 b now hook into the pin 14b, so that the parts 1, 5, 6, 11 and 13 are kept pressed together. The consequence of this is good thermal and electrical contacting of these parts, see FIG. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Resistance Heating (AREA)
  • Air-Conditioning For Vehicles (AREA)

Claims (8)

1. Dispositif de chauffage électrique pour chauffer une plaque (1) à l'aide d'une résistance plate (6) à coefficient de température positif réalisée sous la forme d'une bague cylindrique aplatie, caractérisé par le fait que les surfaces annulaires externes (9, 10) de la résistance (6) à coefficient de température positif forment les électrodes de raccordement, par le fait que la plaque (1) devant être chauffée est percée d'un trou traversant (2), par le fait que la résistance (6) à coefficient de température positif est appliquée par sa première électrode de raccordement (9) autour du trou (2) de ladite plaque (1) et par le fait qu'une pièce de fixation (14), pressant la résistance (6) à coefficient de température positif contre la plaque (1), est poussée à travers l'orifice (7) de ladite résistance (6) à coefficient de température positif et à travers le trou (2) de ladite plaque (1).
2. Dispositif de chauffage selon la revendication 1, caractérisé par le fait que la pièce de fixation (14) presse une pièce annulaire de contact électrique (11) contre la seconde électrode de raccordement (10) de la résistance (6) à coefficient de température positif.
3. Dispositif de chauffage selon la revendication 1, caractérisé par le fait que la pièce de fixation (14) presse contre la seconde électrode de raccordement une tôle perforée (11) répartitrice de chaleur.
4. Dispositif de chauffage selon les revendications 2 et 3, caractérisé par le fait que la pièce de contact (11) est réalisée sous la forme d'une tôle répartitrice de chaleur.
5. Dispositif de chauffage selon les revendications 2 et 3, caractérisé par le fait que la pièce de contact est intercalée entre la résistance à coefficient de température positif et la tôle répartitrice de chaleur.
6. Dispositif de chauffage selon l'une des revendications 1 à 5, caractérisé par le fait que la pièce de fixation (14, 15) est en plusieurs parties.
7. Dispositif de chauffage selon la revendication 6, caractérisé par le fait que la pièce de fixation se compose d'un élément élastique (14) en forme de T comportant un tenon (14b), ainsi que d'un disque annulaire fendu (15) se bloquant automatiquement ; et par le fait que le disque annulaire élastique (15) est enfilé sur le tenon (14b) en emprisonnant la plaque (1), la résistance (6) à coefficient de température positif et éventuellement la tôle répartitrice de chaleur et/ou la pièce de contact (11), les éléments enfilés (1, 6, 11) étant pressés les uns contre les autres.
8. Dispositif de chauffage selon la revendication 7, caractérisé par le fait qu'une bague ondulée élastique (13) est intercalée entre les éléments enfilés (1, 6, 11) et le disque annulaire élastique (15).
EP81110491A 1980-12-22 1981-12-16 Dispositif de chauffage électrique Expired EP0054901B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3048452 1980-12-22
DE3048452A DE3048452C2 (de) 1980-12-22 1980-12-22 Elektrische Heizvorrichtung

Publications (2)

Publication Number Publication Date
EP0054901A1 EP0054901A1 (fr) 1982-06-30
EP0054901B1 true EP0054901B1 (fr) 1984-09-26

Family

ID=6119932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110491A Expired EP0054901B1 (fr) 1980-12-22 1981-12-16 Dispositif de chauffage électrique

Country Status (3)

Country Link
US (1) US4404463A (fr)
EP (1) EP0054901B1 (fr)
DE (1) DE3048452C2 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8233516U1 (de) * 1982-11-30 1983-03-24 Flabeg GmbH, 8510 Fürth Elektrischer heizbelag fuer spiegel
DE3311803A1 (de) * 1983-03-31 1984-10-11 Stettner & Co, 8560 Lauf Elektrische heizvorrichtung, insbesondere fuer spiegel
FR2589025B1 (fr) * 1985-10-21 1987-12-11 Matherm Embout pour resistances electriques realisees sous la forme d'un ruban metallique ondule
US4942286A (en) * 1987-11-13 1990-07-17 Thermacon, Inc. Apparatus for heating a mirror or the like
US5015824A (en) * 1989-02-06 1991-05-14 Thermacon, Inc. Apparatus for heating a mirror or the like
US4894029A (en) * 1989-03-17 1990-01-16 Minnesota Mining And Manufacturing Company Contact for metallized film
JP2532502Y2 (ja) * 1991-02-20 1997-04-16 株式会社村田製作所 発熱ユニット
ES2086434T3 (es) * 1991-07-03 1996-07-01 David & Baader Dbk Spezfab Dispositivo calentador de ptc.
US5561272A (en) * 1993-08-11 1996-10-01 Siemens Aktiengesellschaft Sleeve head having a plurality of cable introduction openings
DE4405040C2 (de) * 1994-02-17 1997-09-25 Marcel Peter Hofsaes Elektrisches Heizgerät
US5856773A (en) * 1996-11-04 1999-01-05 Raychem Corporation Circuit protection device
US6316746B1 (en) 2000-06-23 2001-11-13 Carolyn M. Golston Defrosting assembly for a mirror of a vehicle
US20080314893A1 (en) * 2007-06-25 2008-12-25 Adair Joel E Heating device with adjusting electrical contact
WO2014026000A1 (fr) * 2012-08-10 2014-02-13 Duro Dyne Corporation Broche-support d'isolation convertible

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB505783A (en) * 1937-11-17 1939-05-17 Cressall Mfg Company Ltd Improvements in terminals for electric conductors
US2972002A (en) * 1958-01-28 1961-02-14 Ted A Wayman Fluid-tight joint and cable mounting
BE668892A (fr) 1964-09-11
FR1509654A (fr) * 1967-01-30 1968-01-12 Matsushita Electric Industrial Co Ltd Cafetière électrique automatique
US3646315A (en) * 1967-12-20 1972-02-29 Texas Instruments Inc Self-regulated heating device
US3798419A (en) * 1973-03-12 1974-03-19 Gould Inc Electrical surface heating assembly
FR2254171A1 (en) * 1973-12-07 1975-07-04 British Oxygen Co Ltd Electric heater for flowing liquids - uses porous tube of resistive material as removable immersion heater
DE2438476B2 (de) * 1974-08-09 1979-03-29 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka (Japan) Temperaturkonstante Heizeinrichtung
US3955170A (en) * 1974-11-29 1976-05-04 Texas Instruments Incorporated Solid state switch
DE2540029C3 (de) 1975-09-09 1981-07-30 Siemens AG, 1000 Berlin und 8000 München Haltevorrichtung für Kaltleiter
US4091267A (en) * 1976-07-19 1978-05-23 Texas Instruments Incorporated Self-regulating electric heater
JPS5814206B2 (ja) * 1977-08-27 1983-03-17 松下電工株式会社 ヘア−カ−ラ
US4237366A (en) * 1979-03-19 1980-12-02 Texas Instruments Incorporated Heated automobile mirror
DE7919839U1 (de) 1979-07-11 1980-02-07 Kabelwerke Reinshagen Gmbh, 5600 Wuppertal Beheizbarer spiegel, insbesondere rueckblickspiegel fuer kraftfahrzeuge
DE7929548U1 (de) 1979-10-18 1980-01-31 Kabelwerke Reinshagen Gmbh, 5600 Wuppertal Beheizbarer spiegel, insbesondere rueckblickspiegel fuer kraftfahrzeuge

Also Published As

Publication number Publication date
DE3048452C2 (de) 1983-08-25
DE3048452A1 (de) 1982-07-22
US4404463A (en) 1983-09-13
EP0054901A1 (fr) 1982-06-30

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