EP0054901A1 - Dispositif de chauffage électrique - Google Patents

Dispositif de chauffage électrique Download PDF

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Publication number
EP0054901A1
EP0054901A1 EP81110491A EP81110491A EP0054901A1 EP 0054901 A1 EP0054901 A1 EP 0054901A1 EP 81110491 A EP81110491 A EP 81110491A EP 81110491 A EP81110491 A EP 81110491A EP 0054901 A1 EP0054901 A1 EP 0054901A1
Authority
EP
European Patent Office
Prior art keywords
ptc resistor
plate
heating device
opening
pushed
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
EP81110491A
Other languages
German (de)
English (en)
Other versions
EP0054901B1 (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.
  • 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-GM 79 19 839 and DE-GM 7929 548.
  • a PTC resistor as a self-regulating heating element with a connecting electrode on one Heat distribution plate soldered on.
  • 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 current supply of the motor vehicle connects.
  • the assembly of this PTC resistor and its connections is very complex due to the solder connections. The connections must be made carefully to achieve the lowest possible electrical and thermal contact resistance. In addition, long-term thermal stress cracks can occur in the solder joints.
  • the invention has for its object to provide an electrical heating device of the type mentioned, the PTC resistor can be installed quickly and safely - that is, without large electrical and thermal resistances.
  • the invention solves this problem in that the PTC resistor is designed as a flat cylindrical ring, the outer ring surfaces of which form the connection electrodes, that a continuous opening is arranged in the plate to be heated, and that the PTC resistor has its first connection electrode around the opening at the Plate rests 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.
  • Figure 1 shows the individual parts of a heating device as they are arranged before assembly between a lower and an upper punch of an assembly press.
  • Figure 2 shows the fully assembled heater according to Figure 1 .:
  • 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 lies with a ring shaped connecting electrode 9 on the thermal paste 5.
  • An annular contact part 11 in the form of a brass disk with a plug tongue 12 is placed on the other annular connecting electrode 10.
  • the contact part 11 can be flat - as shown - or as a hood overlapping the PTC resistor, see indicated by the dot-dash line 11 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 with a T-shaped cross section and a slotted spring washer 15 which interacts with it and is known as a "quick fastener".
  • the spring member 14 is made of a heat-resistant plastic, e.g. glass fiber reinforced polycarbonate. It comprises a flat annular pressure 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 the spring washer 15 is formed in the area between the locking fingers 15b slightly smaller than the diameter of the pin 14b. 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 15b 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)
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 true EP0054901A1 (fr) 1982-06-30
EP0054901B1 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589025A1 (fr) * 1985-10-21 1987-04-24 Matherm Embout pour resistances electriques realisees sous la forme d'un ruban metallique ondule
EP0388044A3 (fr) * 1989-03-17 1991-01-23 Minnesota Mining And Manufacturing Company Contact pour film métallisé
EP0521181A1 (fr) * 1991-07-03 1993-01-07 David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH Elément chauffant à PTC

Families Citing this family (11)

* 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
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
JP2532502Y2 (ja) * 1991-02-20 1997-04-16 株式会社村田製作所 発熱ユニット
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

Citations (7)

* 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
FR1509654A (fr) * 1967-01-30 1968-01-12 Matsushita Electric Industrial Co Ltd Cafetière électrique automatique
DE1814682A1 (de) * 1967-12-20 1969-07-24 Texas Instruments Inc Selbstregelnde Heizvorrichtung
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
US3955170A (en) * 1974-11-29 1976-05-04 Texas Instruments Incorporated Solid state switch
US4237366A (en) * 1979-03-19 1980-12-02 Texas Instruments Incorporated Heated automobile mirror

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972002A (en) * 1958-01-28 1961-02-14 Ted A Wayman Fluid-tight joint and cable mounting
BE668892A (fr) 1964-09-11
DE2438476B2 (de) * 1974-08-09 1979-03-29 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka (Japan) Temperaturkonstante Heizeinrichtung
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
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

Patent Citations (8)

* 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
FR1509654A (fr) * 1967-01-30 1968-01-12 Matsushita Electric Industrial Co Ltd Cafetière électrique automatique
DE1814682A1 (de) * 1967-12-20 1969-07-24 Texas Instruments Inc Selbstregelnde Heizvorrichtung
FR1595972A (fr) * 1967-12-20 1970-06-15
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
US3955170A (en) * 1974-11-29 1976-05-04 Texas Instruments Incorporated Solid state switch
US4237366A (en) * 1979-03-19 1980-12-02 Texas Instruments Incorporated Heated automobile mirror

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589025A1 (fr) * 1985-10-21 1987-04-24 Matherm Embout pour resistances electriques realisees sous la forme d'un ruban metallique ondule
EP0388044A3 (fr) * 1989-03-17 1991-01-23 Minnesota Mining And Manufacturing Company Contact pour film métallisé
EP0521181A1 (fr) * 1991-07-03 1993-01-07 David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH Elément chauffant à PTC

Also Published As

Publication number Publication date
EP0054901B1 (fr) 1984-09-26
DE3048452C2 (de) 1983-08-25
DE3048452A1 (de) 1982-07-22
US4404463A (en) 1983-09-13

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