EP0023644A1 - Dispositif de chauffage électrique avec un élément de chauffage en un matériau conducteur à froid - Google Patents

Dispositif de chauffage électrique avec un élément de chauffage en un matériau conducteur à froid Download PDF

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Publication number
EP0023644A1
EP0023644A1 EP80104219A EP80104219A EP0023644A1 EP 0023644 A1 EP0023644 A1 EP 0023644A1 EP 80104219 A EP80104219 A EP 80104219A EP 80104219 A EP80104219 A EP 80104219A EP 0023644 A1 EP0023644 A1 EP 0023644A1
Authority
EP
European Patent Office
Prior art keywords
insulating material
heating element
material frame
heating device
electrode plates
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.)
Withdrawn
Application number
EP80104219A
Other languages
German (de)
English (en)
Inventor
Herbert Steiner
Johann Magg
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0023644A1 publication Critical patent/EP0023644A1/fr
Withdrawn legal-status Critical Current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
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • 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
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • At least the invention relates to an electrical heating device with a heating element made of PTC thermistor material, which has on two opposite surfaces electrically conductive coatings as a contact layer for power supply, through which it gives off the heat generated to two thermally conductive insulating material plates, between which it is clamped under pressure, the The heating element is covered with the insulating material plates on the two free sides, which have the contact layers, with the interposition of a layer of flexible material.
  • the invention has for its object to provide an electrical heating device of the type described, the manufacturing cost is reduced, in particular, requiring less assembly effort during assembly.
  • the heating element in a through opening of an insulating material. frame inserted and the flexible material layers in the form of electrically anchored to the insulating material frame conductive electrode plates serving as current leads are formed.
  • This design has the advantage that the PTC thermistor elements, for example two or three adjacent elements, which form a heater, are held between the electrodes and in the insulating material frame and can be stored as a finished assembly and installed during assembly.
  • This construction also has the advantage that the insulating material frame and the electrode plates protect the very break-sensitive PTC thermistor elements against damage during transport and installation in the heating device.
  • the electrode plates are connected to the insulating material frame by means of rivet connections for anchoring, the rivet connections simultaneously holding electrical connection lines for supplying current to the electrode plates and being able to establish an electrically conductive connection.
  • the riveted connection lines also facilitate assembly, since the heating assembly can be gripped on the connection lines and inserted into the recess provided for this purpose.
  • the rivet connection is expediently formed by rivet connection elements formed on the electrode plates, as a result of which separate rivets are dispensed with and the electrical connection can also be made more reliable, since a contact contact part between the rivet and the electrode plate is thus also eliminated.
  • the electrode plates and the electrical connecting line are advantageously arranged on different sides of the insulating material frame and the rivet establishes the electrical connection between them.
  • the low available space is used well and the insulating material frame is thereby held in a middle position relative to the thickness of the PTC thermistor elements.
  • the part of the insulating material plate which is penetrated by the rivet is preferably bent to a small extent on the insulating material plate, so that a rivet head which projects from this bent part does not hinder the bearing of a flat insulating material disc on the electrode. It also makes the right one Position of the insulating material frame secured.
  • the electrode plates advantageously have tab-shaped projections on their side remote from the rivet connection, over the PTC thermistor elements, which are bent in such a way that they can be hung like a hinge in the openings provided in the insulating material frame, in order in this way to provide a further connection at a location remote from the rivet connection to achieve with the insulating material frame and thus make the assembly even more solid.
  • a thin mica material disc or a mica disc advantageously serves as the insulating material frame.
  • the water bowl 2 of an electric egg cooker shown in the figures has an electric heating device 4 as the bottom.
  • the heating device 4 comprises a heating element 6 with a base plate 8, from which an annular wall 10 extends downward in order to form a receiving space 12 for a heating element assembly 14.
  • the receiving space 12 is closed at the bottom by a cover 16 which is pressed with pressure onto the heating element assembly (not shown in FIG. 1) and pressed into the annular extension 10 and which transfers the heat given off by the heating element assembly downwards to the extension 10 of the radiator 6.
  • FIGS. 3 to 5 The structure of the heating element assembly used in the receiving space 12 can be seen from FIGS. 3 to 5.
  • An insulating material frame 18 in the form of a round, thin mica material disc lies loosely in the receiving space 12, which has a circular cross section, and, loosely inserted into a large central rectangular through opening 20, contains two adjacent heating elements 22 and 24 made of thermistor material, each with their top and bottom sides
  • Contact layers 26 and 28 are provided in the form of electrically conductive coatings, for example made of aluminum, and at least therewith a piece protrudes above and below from the insulating material frame.
  • the electrode plate 30 also has a contact tab 62.
  • a circular insulating material plate 42 is inserted between the electrode plate and the bottom plate 8 forming the ceiling of the receiving space 12.
  • an electrode plate 44 is placed on the contact layers 28 of the heating elements 22 and 24, which, like the cover-side electrode plate 30, is made of a soft aluminum and cranked mounting or adjustment approaches 50 and 52 which reach through adjustment openings 46 and 48 of the insulating material frame 18 has and an offset laterally extending contact tab 60.
  • an insulating material plate 56 is inserted in its plan shape corresponding to the cover shown in FIG. 2.
  • Both insulating material plates are preferably made of a heat-conducting ceramic material, such as aluminum oxide or a silicone resin.
  • thin mica material discs can also be used advantageously.
  • electrode plates on the side remote from the adjustment lugs have a wide contact tabs 60 and 62 formed thereon, which are bent into the space between the insulating material plates 46 and 56 in order to hold flat on the thermistor elements held at medium height
  • the contact lug and the insulating material frame each have a through opening through which a hollow rivet 64 or 66 connecting these two parts is drawn, which furthermore clamps a connecting line 68 or 70 on the side of the insulating material frame 18 remote from the contact lug.
  • the insulating material frame 18 has in the extension of the contact tabs 60 and 62 edge recesses 72 and 74 through which the power supply lines can extend to facilitate assembly.
  • Power lines 68 and 70 are through vertical channels 76 and 78 in the inner wall of the annular wall 10 past the cover 16 downwards.
  • the electrode plates 30 and 44 are hooked into the insulating material frame 18 on one side of the PTC thermistor elements 22 and 24 and then placed over the PTC thermistor elements and, on the other side, are held together with the connecting line by a rivet on the insulating material frame.
  • an assembly is obtained in a relatively simple manner, in which the PTC thermistor elements are firmly held and has the connecting wires projecting therefrom, on which the assembly is grasped during final assembly and can be inserted into the receiving space 12 of the radiator 6 provided for this purpose.
  • the insulating material frame 18 and the insulating material plates 42 and 56 advantageously consist of punched-out plate-shaped mica material, the insulating material frame e.g. Can be 0.7 mm thick, while the other two insulation material plates are 0.07 mm thick.
  • the modified assembly of thermistor elements 522 in an insulating material frame 512 and electrode plates 530 and 544 shown in FIG. 6 differs from the embodiment according to FIGS. 1 to 5 primarily in that the rivet connection is formed by rivet connection elements 564 formed on the electrode plates.
  • the lower electrode plate 544 has a contact tab 560 which engages with an end section 1 forming the rivet through an opening 563 of the insulating material frame and a corresponding opening of a contact tab 568 placed on the insulating material frame 512 and is angled above the contact tab, as a result of which the electrode plate 544 and the contact tab 568 are attached to the insulating material frame 512.
  • An electrical connecting line can be connected to the contact lug 568, which preferably consists of copper or brass, by means of a plug connection element.
  • FIG. 7 shows a further modified embodiment with an insulating material frame 612 in which the PTC thermistor elements 622 are received and on which an upper elec trode plate 630 and a lower electrode plate 644 are attached.
  • a contact lug 640 of the lower electrode plate 644 has a passage 664 formed thereon, which extends through an opening 663 of the insulating material frame 612 and a corresponding opening of a contact lug 668 and is crimped above the same to form the rivet connection.
  • the upper electrode plate 630 is connected to the insulating material frame and a contact tab by means of a similar rivet connection, not shown.
  • the electrode plate is each connected to the insulating material frame by means of a hook-like hinge connection, as in the embodiment according to FIGS. 1 to 5.
  • contact tabs for connecting plug-in connection elements of the electrical connecting lines can also be formed directly on the electrode plates, which then have to be made of a suitable material.
  • the rivet connections only serve to anchor the electrode plates to the insulating material frame, which function they also have to produce the electrical connection in addition to the function in the exemplary embodiments described above.

Landscapes

  • Resistance Heating (AREA)
EP80104219A 1979-08-07 1980-07-18 Dispositif de chauffage électrique avec un élément de chauffage en un matériau conducteur à froid Withdrawn EP0023644A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2932026 1979-08-07
DE19792932026 DE2932026A1 (de) 1979-08-07 1979-08-07 Elektrische heizeinrichtung mit einem heizelement aus kaltleitermaterial

Publications (1)

Publication Number Publication Date
EP0023644A1 true EP0023644A1 (fr) 1981-02-11

Family

ID=6077863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104219A Withdrawn EP0023644A1 (fr) 1979-08-07 1980-07-18 Dispositif de chauffage électrique avec un élément de chauffage en un matériau conducteur à froid

Country Status (4)

Country Link
US (1) US4341949A (fr)
EP (1) EP0023644A1 (fr)
JP (1) JPS5669790A (fr)
DE (1) DE2932026A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312142A (en) * 1996-04-10 1997-10-15 Otter Controls Ltd Mounting controls/connectors to heating elements

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US4387291A (en) * 1980-11-28 1983-06-07 Texas Instruments Incorporated Fuel heater system and self-regulating heater therefor
GB2090710B (en) * 1980-12-26 1984-10-03 Matsushita Electric Ind Co Ltd Thermistor heating device
US4447705A (en) * 1981-06-04 1984-05-08 Clairol Incorporated Hair curlers having PTC electric heating element
US4574188A (en) * 1982-04-16 1986-03-04 Raychem Corporation Elongate electrical assemblies
US4791276A (en) * 1982-04-16 1988-12-13 Raychem Corporation Elongate electrical assemblies
US4582983A (en) * 1982-04-16 1986-04-15 Raychem Corporation Elongate electrical assemblies
US4659913A (en) * 1982-04-16 1987-04-21 Raychem Corporation Elongate electrical assemblies
US4576798A (en) * 1983-06-21 1986-03-18 Safeway Products, Inc. Contact lens disinfecting unit
US4493978A (en) * 1983-07-11 1985-01-15 Starnes Roger A Serving dish with heating means
JPS60112281A (ja) * 1983-11-18 1985-06-18 松下電工株式会社 ヒ−タ
US4719335A (en) * 1984-01-23 1988-01-12 Raychem Corporation Devices comprising conductive polymer compositions
US4761541A (en) * 1984-01-23 1988-08-02 Raychem Corporation Devices comprising conductive polymer compositions
US4777351A (en) * 1984-09-14 1988-10-11 Raychem Corporation Devices comprising conductive polymer compositions
US4728779A (en) * 1985-09-27 1988-03-01 Tdk Corporation PTC heating device
US4689475A (en) * 1985-10-15 1987-08-25 Raychem Corporation Electrical devices containing conductive polymers
US4801785A (en) * 1986-01-14 1989-01-31 Raychem Corporation Electrical devices
GB8604519D0 (en) * 1986-02-24 1986-04-03 Raychem Sa Nv Electrical devices
US4791272A (en) * 1986-10-24 1988-12-13 Windmere Corporation PTC hair roller
US4822981A (en) * 1987-06-19 1989-04-18 Hatco Corporation Self-regulating warmer device for food products
US4937435A (en) * 1987-12-14 1990-06-26 Thermon Manufacturing Company Flexible electric heating pad using PTC ceramic thermistor chip heating elements
DD301817B5 (de) * 1989-01-02 1994-03-31 Espv Elektronik Sys Prod & Vertriebs Gmbh Selbstregelnde elektrische heizeinrichtung mit ptc-heizelementen
DE3902205A1 (de) * 1989-01-26 1990-08-02 Eichenauer Gmbh & Co Kg F Halteteil fuer ptc-elemente
DE3902206A1 (de) * 1989-01-26 1990-08-02 Eichenauer Gmbh & Co Kg F Vorrichtung zum erhitzen von gasen
JP2532502Y2 (ja) * 1991-02-20 1997-04-16 株式会社村田製作所 発熱ユニット
US5283420A (en) * 1991-05-06 1994-02-01 Montalto Bartolino P Electrically heated beverage container
DE69606310T2 (de) * 1995-08-15 2001-04-05 Bourns, Multifuse (Hong Kong) Ltd. Oberflächenmontierte leitfähige bauelemente und verfahren zur herstellung derselben
TW309619B (fr) * 1995-08-15 1997-07-01 Mourns Multifuse Hong Kong Ltd
US6054692A (en) * 1997-06-25 2000-04-25 Takehiko Hitomi Heating device, heat storing type heat generating body and protective sheet for the heating device
US6020808A (en) * 1997-09-03 2000-02-01 Bourns Multifuse (Hong Kong) Ltd. Multilayer conductive polymer positive temperature coefficent device
IL122833A (en) * 1997-12-31 2002-11-10 A T C T Advanced Thermal Chips Autoclave device and thermistor heating arrangement for use therewith
US6242997B1 (en) 1998-03-05 2001-06-05 Bourns, Inc. Conductive polymer device and method of manufacturing same
US6236302B1 (en) 1998-03-05 2001-05-22 Bourns, Inc. Multilayer conductive polymer device and method of manufacturing same
US6172591B1 (en) 1998-03-05 2001-01-09 Bourns, Inc. Multilayer conductive polymer device and method of manufacturing same
KR20010079908A (ko) 1998-09-25 2001-08-22 추후보정 정의 온도 계수 폴리머 재료 제조 방법
US6121585A (en) * 1999-03-30 2000-09-19 Robert Dam Electrically heated beverage cup and cupholder system
US6429533B1 (en) 1999-11-23 2002-08-06 Bourns Inc. Conductive polymer device and method of manufacturing same
TWM240011U (en) * 2003-01-30 2004-08-01 Jia-Shiung Wu Improved structure of thermal cooker
CN102697377A (zh) * 2012-05-24 2012-10-03 何志雄 一种节能式微型电饭锅的加热体安装结构
US10244893B2 (en) * 2013-01-14 2019-04-02 Hamilton Beach Brands, Inc. Sandwich making appliance and method of making a sandwich with the same

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US2606986A (en) * 1951-07-14 1952-08-12 Barber Colman Co Resistance unit
FR1509654A (fr) * 1967-01-30 1968-01-12 Matsushita Electric Ind Co Ltd Cafetière électrique automatique
FR2141840A1 (fr) * 1971-06-15 1973-01-26 Danfoss As
US3720807A (en) * 1972-05-01 1973-03-13 Texas Instruments Inc Food warming apparatus
FR2277490A1 (fr) * 1974-07-01 1976-01-30 Texas Instruments Inc Appareil de chauffage auto-regule, notamment du carter du compresseur d'une machine de refrigeration
DE2722213A1 (de) * 1977-05-17 1978-11-30 Eichenauer Fa Fritz Elektrischer heizkoerper
DE2836247A1 (de) * 1978-08-18 1980-03-06 Bosch Siemens Hausgeraete Elektrische heizeinrichtung mit einem heizelement aus kaltleitermaterial

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US3733462A (en) * 1972-01-11 1973-05-15 Raytheon Co Heating element for flush top ranges
US3891827A (en) * 1973-01-12 1975-06-24 Gad Jets Inc Electrical heating device for use with aerosol containers
US3835434A (en) * 1973-06-04 1974-09-10 Sprague Electric Co Ptc resistor package
US3976854A (en) * 1974-07-31 1976-08-24 Matsushita Electric Industrial Co., Ltd. Constant-temperature heater
DE2743880C3 (de) * 1977-09-29 1981-05-14 Siemens AG, 1000 Berlin und 8000 München Heizeinrichtung mit einem optimierten Heizelement aus Kaltleiter-Material
DE2806159C3 (de) * 1978-02-14 1980-09-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Tauchsieder
DE2816076A1 (de) * 1978-04-13 1979-10-25 Siemens Ag Heizer mit ferroelektrischem keramik-heizelement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2606986A (en) * 1951-07-14 1952-08-12 Barber Colman Co Resistance unit
FR1509654A (fr) * 1967-01-30 1968-01-12 Matsushita Electric Ind Co Ltd Cafetière électrique automatique
FR2141840A1 (fr) * 1971-06-15 1973-01-26 Danfoss As
US3720807A (en) * 1972-05-01 1973-03-13 Texas Instruments Inc Food warming apparatus
FR2277490A1 (fr) * 1974-07-01 1976-01-30 Texas Instruments Inc Appareil de chauffage auto-regule, notamment du carter du compresseur d'une machine de refrigeration
DE2722213A1 (de) * 1977-05-17 1978-11-30 Eichenauer Fa Fritz Elektrischer heizkoerper
DE2836247A1 (de) * 1978-08-18 1980-03-06 Bosch Siemens Hausgeraete Elektrische heizeinrichtung mit einem heizelement aus kaltleitermaterial

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312142A (en) * 1996-04-10 1997-10-15 Otter Controls Ltd Mounting controls/connectors to heating elements
GB2312142B (en) * 1996-04-10 2000-09-20 Otter Controls Ltd Improvements relating to electrically powered liquid heating appliances and controls therefor

Also Published As

Publication number Publication date
DE2932026A1 (de) 1981-02-26
JPS5669790A (en) 1981-06-11
US4341949A (en) 1982-07-27

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

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Effective date: 19820120

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Inventor name: MAGG, JOHANN

Inventor name: STEINER, HERBERT