EP1024680A2 - Vorrichtung mit einem Dickschicht-Heizelement und Verfahren zu dessen Herstellung - Google Patents
Vorrichtung mit einem Dickschicht-Heizelement und Verfahren zu dessen Herstellung Download PDFInfo
- 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
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
- H05B3/02—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)
Abstract
Description
- Fig. 1
- ein Schaltbild einer Vorrichtung mit einem Vorwiderstand,
- Fig. 2
- ein Dickschicht-Heizelement auf einer Trägerplatte entsprechend dem Schaltbild nach Fig. 1,
- Fig. 3
- ein Schaltbild einer Vorrichtung mit einer Spannungsteilung und
- Fig. 4
- ein Dickschicht-Heizelement auf einer Trägerplatte entsprechend dem Schaltbild nach Fig. 3.
- 10
- Dickschicht-Heizelement
- 12
- Dickschicht-Heizelement
- 14
- Kontaktfläche
- 16
- Kontaktfläche
- 18
- Versorgungsspannung
- 20
- Kontaktfläche
- 22
- Kontaktfläche
- 24
- Verbraucher
- 26
- Hauptheizkreis
- 28
- Heizkreis
- 30
- Leitungsstück
- 32
- Kontaktfeder
- 34
- Kontaktfeder
- 36
- Haltevorrichtung
- 38
- Haltevorrichtung
- 40
- Grundkörper
- 42
- Leitungsstück
- 44
- Leitungsstück
- 46
- Leitungsstück
- 48
- Leitungsstück
- 50
- Leitungsstück
- 52
- Leitungsstück
- 54
- Trägerplatte
- 56
- Kontaktfeder
- 58
- Kontaktfeder
Claims (9)
- Vorrichtung mit einem Dickschicht-Heizelement (10, 12), das über zwei Kontaktflächen (14, 16) mit einer ersten Versorgungsspannung (18) versorgt wird, dadurch gekennzeichnet, daß über zumindest eine zusätzliche Kontaktfläche (20, 22) am Dickschicht-Heizelement (10, 12) eine zweite Versorgungsspannung für einen weiteren Verbraucher (24) abgreifbar ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Dickschicht-Heizelement (10) einen Hauptheizkreis (26) und einen als Vorwiderstand dienenden zweiten Heizkreis (28) aufweist, wobei der zweite Heizkreis (28) mit dem Verbraucher (24) in Reihe und mit diesem gemeinsam über die zusätzliche Kontaktfläche (20) parallel zum Hauptheizkreis (26) geschaltet ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die zusätzliche Kontaktfläche (22) elektrisch zwischen den zwei Kontaktflächen (14, 16) am Dickschicht-Heizelement (12) angeordnet ist und durch Spannungsteilung die zweite Versorgungsspannung an einer der zwei Kontaktflächen (14, 16) und an der zusätzlichen Kontaktfläche (22) abgreifbar ist.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die zusätzliche Kontaktfläche (22) von einem niederohmigen Teil des Dickschicht-Heizelements (12) gebildet ist.
- Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der niederohmige Teil des Dickschicht-Heizelements (12) ein Leitungsstück (30) ist.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kontakt mit der zusätzlichen Kontaktfläche (20, 22) über eine Kontaktfeder (32, 34) hergestellt ist.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß zumindest ein Teil einer Haltevorrichtung (36, 38) für die Kontaktfeder (32, 34) einstückig mit einem vorhandenen Bauteil ausgeführt ist.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß das Bauteil ein Grundkörper (40) einer Steuereinheit ist.
- Verfahren zur Herstellung eines Grundkörpers (40) einer Steuereinheit für eine Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß in einem formgebenden Verfahrensschritt des Grundkörpers (40) gleichzeitig zumindest ein Teil der Haltevorrichtung (36, 38) für die zusätzliche Kontaktfeder (32, 34) angeformt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19903590 | 1999-01-29 | ||
DE1999103590 DE19903590A1 (de) | 1999-01-29 | 1999-01-29 | Vorrichtung mit einem Dickschicht-Heizelement und Verfahren zu dessen Herstellung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1024680A2 true EP1024680A2 (de) | 2000-08-02 |
EP1024680A3 EP1024680A3 (de) | 2002-05-02 |
EP1024680B1 EP1024680B1 (de) | 2005-09-14 |
Family
ID=7895819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000101111 Expired - Lifetime EP1024680B1 (de) | 1999-01-29 | 2000-01-20 | Vorrichtung mit einem Dickschicht-Heizelement und Verfahren zu dessen Herstellung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1024680B1 (de) |
DE (2) | DE19903590A1 (de) |
ES (1) | ES2249203T3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005011331A1 (en) * | 2003-07-30 | 2005-02-03 | Koninklijke Philips Electronics N.V. | Domestic appliance and heating structure for a domestic appliance |
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)
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 |
Citations (4)
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 |
EP0455069A2 (de) * | 1990-04-26 | 1991-11-06 | Toshiba Lighting & Technology Corporation | Anordnung zum Erwärmen |
WO1998006110A1 (de) * | 1996-08-03 | 1998-02-12 | Robert Bosch Gmbh | In hybridtechnik hergestellte abgleichbare spannungsteiler-anordnung |
US5793929A (en) * | 1993-02-15 | 1998-08-11 | Strix Limited | Immersion heaters with heating elements in the form of printed circuit tracks |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1999
- 1999-01-29 DE DE1999103590 patent/DE19903590A1/de not_active Withdrawn
-
2000
- 2000-01-20 DE DE50011144T patent/DE50011144D1/de not_active Expired - Lifetime
- 2000-01-20 EP EP20000101111 patent/EP1024680B1/de not_active Expired - Lifetime
- 2000-01-20 ES ES00101111T patent/ES2249203T3/es not_active Expired - Lifetime
Patent Citations (4)
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 |
EP0455069A2 (de) * | 1990-04-26 | 1991-11-06 | Toshiba Lighting & Technology Corporation | Anordnung zum Erwärmen |
US5793929A (en) * | 1993-02-15 | 1998-08-11 | Strix Limited | Immersion heaters with heating elements in the form of printed circuit tracks |
WO1998006110A1 (de) * | 1996-08-03 | 1998-02-12 | Robert Bosch Gmbh | In hybridtechnik hergestellte abgleichbare spannungsteiler-anordnung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005011331A1 (en) * | 2003-07-30 | 2005-02-03 | Koninklijke Philips Electronics N.V. | Domestic appliance and heating structure for a domestic appliance |
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 |
---|---|
EP1024680A3 (de) | 2002-05-02 |
ES2249203T3 (es) | 2006-04-01 |
DE50011144D1 (de) | 2005-10-20 |
DE19903590A1 (de) | 2000-08-03 |
EP1024680B1 (de) | 2005-09-14 |
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