EP1024680A2 - Elément chauffant à couche épaisse et son procédé de fabrication - Google Patents

Elément chauffant à couche épaisse et son procédé de fabrication Download PDF

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Publication number
EP1024680A2
EP1024680A2 EP00101111A EP00101111A EP1024680A2 EP 1024680 A2 EP1024680 A2 EP 1024680A2 EP 00101111 A EP00101111 A EP 00101111A EP 00101111 A EP00101111 A EP 00101111A EP 1024680 A2 EP1024680 A2 EP 1024680A2
Authority
EP
European Patent Office
Prior art keywords
thick
heating element
additional
film heating
contact
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
EP00101111A
Other languages
German (de)
English (en)
Other versions
EP1024680A3 (fr
EP1024680B1 (fr
Inventor
Bernd Fränzel
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1024680A2 publication Critical patent/EP1024680A2/fr
Publication of EP1024680A3 publication Critical patent/EP1024680A3/fr
Application granted granted Critical
Publication of EP1024680B1 publication Critical patent/EP1024680B1/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
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H05B3/08—Heater elements structurally combined with coupling elements or holders having electric connections specially adapted for high temperatures
    • 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
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • the invention relates to a device with a thick-film heating element and a method according to the type of the independent claims.
  • the heating coil owns two connection points through which it is supplied with a supply voltage.
  • the Supply voltage for the additional consumer is at one of the connection points and on an additional contact surface between the connection points on the heating coil tapped with a contact element.
  • the additional contact area on the The heating coil is structurally complex and expensive, especially in the case of tubular heaters which the heating coil is guided in a tube. Heat is generated via the contact element dissipated by the heating coil.
  • the heating coil must not be damaged in the long term and the contact element and possibly the consumer need for high temperatures be interpreted.
  • thick-film heating elements In order to heat objects and liquids, it is known to use thick-film heating elements use, for example for heating water in a kettle, etc.
  • the thick-film heating element is made from a thick-film paste with a high ohmic Resistance produced, which is applied to a carrier plate.
  • a supply voltage is applied to the thick-film paste applied, usually a mains voltage.
  • the object of the invention is to provide a device with a heating element create a simple supply voltage for an additional consumer and can be tapped inexpensively.
  • the object is achieved by the features of the independent claims, while advantageous refinements and developments the invention can be found in the subclaims.
  • contact surfaces for the electrical connection of the Thick film heating element generally required.
  • the contact areas can be shared with the thick-film heating element can be produced inexpensively in one process step, for example in a screen printing process. Additional contact areas for one additional supply voltages do not result in additional technological outlay.
  • the thick-film heating element is proposed with one main heating circuit and a second one serving as a series resistor Execute heating circuit.
  • the second heating circuit is in series with the additional consumer and together with it via the additional contact surface parallel to the main heating circuit switched.
  • the heat loss at the series resistor or the second heating circuit is delivered and used in the same way as that of the main heating circuit or Main heat source.
  • the series resistor thus makes a contribution to the total heating output and increases the efficiency of the device.
  • the series resistor and the main heat source are advantageous from the same material and can be inexpensive in one Process step are produced, for example by means of screen printing. The cost of materials increases only slightly. Are several different supply voltages needed, can also by the flexible design of the thick-film heating element several different series resistors can be integrated as heating circuits.
  • the additional contact area electrically between arrange the two contact surfaces on the thick-film heating element and through Voltage division the second, lower supply voltage on one of the two contact surfaces and to tap on the additional contact surface. Additional material for a series resistor can be saved.
  • the contact area can be directly on the thick-film heating element in a high-resistance area to be ordered.
  • One usually applied to the thick film heater insulating protective layer must in this case on the corresponding contact surfaces be saved.
  • the contact area of a low-resistance is advantageous Part of the thick-film heating element formed, whereby less in the contact area Temperatures prevail. Contact elements and the consumer can go to lower Temperatures and thus be designed more cost-effectively.
  • the low impedance Contact areas can be from an area of low-resistance thick-film paste or from one low-resistance line section are formed. Low-resistance line sections become often used to separate parts of the thick film heater connect.
  • connection point for tapping the additional supply voltage no additional low-resistance thick-film paste is used for the additional contact area required. Furthermore, the resistance is advantageous across the board low-resistance contact area largely the same, so that at different positions the same supply voltage can be picked up on the contact surface.
  • a contact between the additional contact area and the additional consumer can be produced in various ways which appear suitable to the person skilled in the art, such as by soldering, gluing, etc.
  • the contact is particularly advantageous but made with a contact spring.
  • the consumer can connect quickly and cleanly and in particular can be detached from the contact surface. The danger contamination from solder or adhesive is avoided.
  • the Contacts for the supply voltage of the thick-film heating element also with contact springs manufactured. It can rely on largely existing and mature components become. Furthermore, additional technological outlay is avoided.
  • At least part of a holding device for the contact spring with an is advantageous existing component executed in one piece, for example a recording in one Component on which there are already contact springs for the supply voltage of the thick-film heating element are attached.
  • a manufacturer of a Kettle designed his own, according to his design needs Insert and fasten the contact spring, for example with a snap connection etc. Additional components, assembly effort and costs can be saved.
  • Devices with a thick film heating element often have a control unit which certain parameters of the device and in particular of the thick-film heating element controls, such as temperature, time of heating, etc.
  • the control unit owns a base body, which is advantageously on the support plate of the thick-film heating element or is attached to a component in the area of the thick-film heating element.
  • the basic bodies are often contact springs for the supply voltage of the thick-film heating element attached so that at least a part of the particularly advantageous Holding device for the additional contact spring is integrated.
  • the invention proposes at least a part of the holding device for the additional Contact spring simultaneously in a shaping process step of the base body, to be molded onto these, for example in an injection molding process. Additional Process steps and manufacturing costs can be saved. Basically you can however parts of the holding devices, for example recesses, also in subsequent ones Process steps are introduced, for example by cutting processes, such as drilling, milling, etc.
  • the contact spring at the consumer of the control unit for example at the manufacturer a kettle, can be installed at the manufacturer of the control unit be pre-assembled. Due to the high design flexibility, the thick-film heating element simply adapted to the position of the contact spring and a second supply voltage according to the invention via a series resistor and / or via a voltage division be tapped.
  • the control unit provides pre-assembled contact springs is a self-contained assembly that is easy to check for its function can be assembled and disassembled quickly and easily.
  • Fig. 1 shows a circuit diagram of a kettle not shown with a thick-film heating element 10, which has two supply surfaces 14, 16 (FIG. 2) with a supply voltage 18 is supplied.
  • the thick-film heating element 10 consists of individual Rolls of thick-film paste that are applied to a carrier plate 54 and over low-resistance Line pieces 42, 44, 46, 48, 50, 52 are connected.
  • the thick film heating element 10 has a main heating circuit 26 and one serving as a series resistor second heating circuit 28 (Fig. 1 and 2).
  • the second heating circuit 28 is like the main heating circuit 26 from a sheet of thick-film paste and with a consumer 24 in series and over an additional contact surface 20 connected in parallel to the main heating circuit 26.
  • the second Heating circuit 28 is via the line section 42 with the contact surface 14 and via the additional contact surface 20 and a contact spring 32 with one in Fig. 2 not closer shown consumer 24 (Fig. 1) connected, which in turn with the second contact surface 16 is connected.
  • a second supply voltage for the consumer 24 can can be tapped easily and inexpensively on the thick-film heating element 10 and the Heating power of the second heating circuit 28 or the series resistor is increased the efficiency of the kettle.
  • a control unit with a base body 40 is arranged above the carrier plate 54, the attached to the support plate 54 via fastening supports, not shown is.
  • the contacts for the supply voltage 18 for the main heating circuit 26 are over two contact springs 56, 58 made, which are attached to the base body 40.
  • the contact spring 32 for the additional contact surface 20 is also via a not shown, Holding device 36 on the base body, which is made in one piece with the base body 40 40 attached. Additional components for a holding device can be saved become.
  • FIG. 3 and 4 shows a further embodiment of the invention, in which an additional Contact area 22 electrically between the two contact areas 14, 16 of a thick-film heating element 12 is arranged. Constant components are always with the numbered the same reference numerals. By voltage division is a second supply voltage for the consumer 24 on the contact surface 16 and on the additional contact surface 22 can be tapped.
  • the thick film heating element 12 consists of individual on the Carrier plate 54 applied sheets of thick-film paste with low-resistance power pieces 30, 44, 48, 50, 52 are connected.
  • the additional contact surface 22 is formed by the power unit 30. An additional contact area can be omitted.
  • the contacts for the supply voltage 18 for the thick-film heating element 12 are Manufactured via two contact springs 56, 58, which are attached to the base body 40 of the control unit are.
  • the contact with the additional contact surface 22 is via a contact spring 34 produced, also via a not shown, in one piece with the Base body 40 designed holding device 38 is attached to the base body 40.

Landscapes

  • Resistance Heating (AREA)
  • Control Of Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)
EP20000101111 1999-01-29 2000-01-20 Elément chauffant à couche épaisse et son procédé de fabrication Expired - Lifetime EP1024680B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999103590 DE19903590A1 (de) 1999-01-29 1999-01-29 Vorrichtung mit einem Dickschicht-Heizelement und Verfahren zu dessen Herstellung
DE19903590 1999-01-29

Publications (3)

Publication Number Publication Date
EP1024680A2 true EP1024680A2 (fr) 2000-08-02
EP1024680A3 EP1024680A3 (fr) 2002-05-02
EP1024680B1 EP1024680B1 (fr) 2005-09-14

Family

ID=7895819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000101111 Expired - Lifetime EP1024680B1 (fr) 1999-01-29 2000-01-20 Elément chauffant à couche épaisse et son procédé de fabrication

Country Status (3)

Country Link
EP (1) EP1024680B1 (fr)
DE (2) DE19903590A1 (fr)
ES (1) ES2249203T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005011331A1 (fr) * 2003-07-30 2005-02-03 Koninklijke Philips Electronics N.V. Appareil electromenager et structure de chauffage d'un appareil electromenager
US9371841B2 (en) 2012-03-05 2016-06-21 Electrolux Home Products, Inc. Safety arrangement for an integrated heater, pump, and motor for an appliance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10251872B3 (de) * 2002-11-07 2004-02-05 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung und Verfahren mit einer Sensoreinheit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3344872A1 (de) * 1983-12-12 1985-06-20 Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut Spannungsteiler
JPH048557A (ja) * 1990-04-26 1992-01-13 Toshiba Lighting & Technol Corp ヒータ
US5288973A (en) * 1991-12-28 1994-02-22 Rohm Co., Ltd. Heater for sheet material
DE4341035A1 (de) * 1993-12-02 1995-06-08 Ego Elektro Blanc & Fischer Beheizung mit einer Heizeinheit
GB9302965D0 (en) * 1993-02-15 1993-03-31 Strix Ltd Immersion heaters
DE19631477A1 (de) * 1996-08-03 1998-02-05 Bosch Gmbh Robert In Hybridtechnik hergestellte abgleichbare Spannungsteiler-Anordnung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005011331A1 (fr) * 2003-07-30 2005-02-03 Koninklijke Philips Electronics N.V. Appareil electromenager et structure de chauffage d'un appareil electromenager
US9371841B2 (en) 2012-03-05 2016-06-21 Electrolux Home Products, Inc. Safety arrangement for an integrated heater, pump, and motor for an appliance

Also Published As

Publication number Publication date
ES2249203T3 (es) 2006-04-01
EP1024680A3 (fr) 2002-05-02
EP1024680B1 (fr) 2005-09-14
DE19903590A1 (de) 2000-08-03
DE50011144D1 (de) 2005-10-20

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