EP1024680B1 - Device with thick film heater and its manufacturing process - Google Patents
Device with thick film heater and its manufacturing process Download PDFInfo
- Publication number
- EP1024680B1 EP1024680B1 EP20000101111 EP00101111A EP1024680B1 EP 1024680 B1 EP1024680 B1 EP 1024680B1 EP 20000101111 EP20000101111 EP 20000101111 EP 00101111 A EP00101111 A EP 00101111A EP 1024680 B1 EP1024680 B1 EP 1024680B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- contact surface
- thick
- thick film
- additional
- 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 - Lifetime
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 preamble of the independent claims.
- a heating coil by voltage division, a second supply voltage to tap for an additional consumer.
- the heating coil has two connection points, via which it is supplied with a supply voltage.
- the Supply voltage for the additional load is at one of the connection points and at an additional contact surface between the connection points on the heating coil tapped with a contact element.
- the additional contact surface at the Heating coil is structurally complex and expensive, especially in tubular heaters, in where the heating coil is guided in a tube.
- About the contact element is heat removed from 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 are known use, for example, to heat water in a kettle, etc.
- the thick-film heating element is made of a thick film paste with a high ohmic Resistance produced, which is applied to a carrier plate.
- a supply voltage to the thick-film paste created is usually a mains voltage.
- the object of the invention is to provide a device with a heating element create a supply voltage for an additional consumer easy and can be tapped inexpensively.
- the object is achieved by the features solved the independent claims, while advantageous embodiments and developments the invention can be taken from the dependent claims.
- contact surfaces for electrical connection of the Thick film heating element generally needed.
- the contact surfaces can be shared with the thick-film heating element are produced inexpensively in one process step, for example in a screen printing process. Additional contact surfaces for one further supply voltage cause no additional technological effort.
- the thick-film heating element with a main heating circuit and serving as a resistor second Run the heating circuit.
- the second heating circuit is in series with the additional load and together with this over the additional contact surface parallel to the main heating circuit connected.
- the heat loss at the series resistor or the second heating circuit is delivered and used in the same way as the main heating circuit or the Main heat source.
- the series resistor thus contributes to the total heating power and increases the efficiency of the device.
- the series resistor and the main heat source are advantageous from the same material and can be cost effective in one Process step are prepared, for example by screen printing. The cost of materials increases only slightly. Becomes several different supply voltages may also be due to the flexible design of the thick-film heating element several different series resistors are integrated as heating circuits.
- the additional contact surface electrically between to arrange the two contact surfaces on the thick-film heating element and through Voltage division the second, lower supply voltage at one of the two contact surfaces and tap off at the additional contact surface. Additional material for a series resistor can be saved.
- the contact surface can directly on the thick-film heating element in a high-impedance region to be ordered.
- a commonly applied to the thick film heating element insulating protective layer must in this case at the corresponding contact surfaces be saved.
- the contact surface of a low-impedance is advantageous Part of the thick film heating element formed, whereby in the contact area lower Temperatures prevail. Contact elements and the consumer can on lower Temperatures and thus be designed more cost-effective.
- the low-resistance Contact surfaces can range from a range of low-resistance thick-film paste or one low-resistance line piece are formed. Be low-impedance line pieces commonly used to interconnect individual parts of the thick film heating element connect.
- a contact between the additional contact surface and the additional consumer can be prepared in various ways that appear to be suitable to a person skilled in the art, such as by soldering, gluing, etc. Particularly advantageous is the contact but made with a contact spring. The consumer can connect quickly and cleanly and in particular be released again from the contact surface. The danger contamination by solder or adhesive is avoided. Furthermore, the Contacts for the supply voltage of the thick film heating element also with contact springs produced. It can be used on largely existing and mature components become. Furthermore, a technological extra effort is avoided.
- a holding device for the contact spring with a existing component integrally executed for example, a recording in one Component on which already contact springs for the supply voltage of the thick film heating element are attached.
- a recording for example, a manufacturer of a Wasserkochers his own, designed according to its design requirements Insert contact spring and fastened, for example by a latching connection, etc. Additional components, assembly costs and costs can be saved.
- a control unit which certain parameters of the device and in particular the thick-film heating element controls, such as temperature, time of heating, etc.
- the control unit has a body advantageously on the support plate of the thick film heating element or attached to a component in the region of the thick film heating element.
- To the Base bodies are often contact springs for the supply voltage of the thick-film heating element attached, so that at this particularly advantageous at least part of 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 at the same time in a shaping step of the body, to be formed on these, for example in an injection molding process. Additional Process steps and production costs can be saved. Basically you can However, parts of the holding devices, such as recesses, even in subsequent Procedural steps are introduced, for example by machining processes, like drilling, milling, etc.
- the contact spring at the consumer of the control unit for example, the manufacturer a kettle
- this can be installed by 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 a voltage division be tapped.
- pre-assembled contact springs provides the control unit a self-contained and easily verifiable on their function assembly, the easy and quick to assemble and disassemble.
- Fig. 1 shows a circuit diagram of a kettle not shown with a thick-film heating element 10, via two contact surfaces 14, 16 (FIG. 2) with a supply voltage 18 is supplied.
- the thick-film heating element 10 consists of individual Webs thick film paste applied to a support plate 54 and 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 serving as a resistor second heating circuit 28 ( Figures 1 and 2).
- the second heating circuit 28 is like the main heating circuit 26 from a web thick-film paste and is connected to 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 piece 42 with the contact surface 14 and over additional contact surface 20 and a contact spring 32 with a in Fig. 2 is not closer shown consumer 24 (Fig. 1) connected, in turn, with the second contact surface 16 is connected.
- a second supply voltage for the consumer 24 can simply and inexpensively tapped on the thick-film heating element 10 and the Heating power of the second heating circuit 28 and the series resistor is to increase the efficiency of the kettle used.
- a control unit is arranged with a main body 40, fastened by not shown fastening supports on the support plate 54 is.
- the contacts for the supply voltage 18 for the main heating circuit 26 are over two contact springs 56, 58 made, which are fixed to the base body 40.
- the contact spring 32 to the additional contact surface 20 is also not shown in detail, integral with the base body 40 running holding device 36 on the body 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 surface 22 electrically between the two contact surfaces 14, 16 of a thick-film heating element 12 is arranged. Constant components are basically with the the same reference numerals. By voltage division is a second supply voltage for the consumer 24 at the contact surface 16 and at the additional contact surface 22 can be tapped.
- the thick-film heating element 12 consists of individual on the Carrier plate 54 applied webs thick-film paste, which with low-impedance nurse Culture En 30, 44, 48, 50, 52 are connected.
- the additional contact surface 22 is formed by the service piece 30. An additional contact surface can be omitted.
- the contacts for the supply voltage 18 for the thick-film heating element 12 are made via two contact springs 56, 58 which are fastened to the main body 40 of the control unit are.
- the contact with the additional contact surface 22 is via a contact spring 34 produced, which also has a not shown in one piece with the Base body 40 executed holding device 38 is fixed to the base body 40.
Landscapes
- Resistance Heating (AREA)
- Control Of Resistance Heating (AREA)
- Surface Heating Bodies (AREA)
Description
Die Erfindung geht aus von einer Vorrichtung mit einem Dickschicht-Heizelement und einem Verfahren nach der Gattung der unabhängigen Ansprüche.The invention relates to a device with a thick-film heating element and a method according to the preamble of the independent claims.
Bei Vorrichtungen mit einer Heizwendel ist bekannt, neben einer Versorgungsspannung für die Heizwendel mit einem Vorwiderstand eine zweite, niedrigere Versorgungsspannung für einen zusätzlichen Verbraucher abzugreifen, beispielsweise für eine Betriebsanzeigeleuchte, für einen Elektromotor usw. Der Vorwiderstand ist dabei mit dem Verbraucher in Reihe und gemeinsam mit diesem parallel zur Heizwendel geschaltet. Soll ein großer Spannungsabfall realisiert werden, sind teure und großvolumige Hochleistungswiderstände erforderlich. Die Widerstände müssen mit einer zusätzlichen Halterung montiert und deren Wärme muß mit hohem konstruktiven und kostenintensivem Aufwand gezielt abgeführt werden.In devices with a heating coil is known, in addition to a supply voltage for the heating coil with a series resistor a second, lower supply voltage for an additional consumer, for example for a service indicator, for an electric motor, etc. The series resistor is with the consumer connected in series and together with this parallel to the heating coil. Should a large voltage drops are realized, are expensive and large-volume high-performance resistors required. The resistors must be mounted with an additional bracket and their heat must be targeted with high constructive and costly effort be dissipated.
Ferner ist bekannt, an einer Heizwendel durch Spannungsteilung eine zweite Versorgungsspannung für einen zusätzlichen Verbraucher abzugreifen. Die Heizwendel besitzt zwei Anschlußstellen, über die sie mit einer Versorgungsspannung versorgt wird. Die Versorgungsspannung für den zusätzlichen Verbraucher wird an einer der Anschlußstellen und an einer zusätzlichen Kontaktfläche zwischen den Anschlußstellen an der Heizwendel mit einem Kontaktelement abgegriffen. Die zusätzliche Kontaktfläche an der Heizwendel ist konstruktiv aufwendig und teuer, insbesondere bei Rohrheizkörpern, bei denen die Heizwendel in einem Rohr geführt wird. Über das Kontaktelement wird Wärme von der Heizwendel abgeführt. Die Heizwendel darf dadurch auf Dauer nicht beschädigt und das Kontaktelement und möglicherweise der Verbraucher müssen für hohe Temperaturen ausgelegt werden. Furthermore, it is known to a heating coil by voltage division, a second supply voltage to tap for an additional consumer. The heating coil has two connection points, via which it is supplied with a supply voltage. The Supply voltage for the additional load is at one of the connection points and at an additional contact surface between the connection points on the heating coil tapped with a contact element. The additional contact surface at the Heating coil is structurally complex and expensive, especially in tubular heaters, in where the heating coil is guided in a tube. About the contact element is heat removed from 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.
Um Gegenstände und Flüssigkeiten zu erwärmen, ist bekannt, Dickschicht-Heizelemente einzusetzen, beispielsweise zur Erwärmung von Wasser in einem Wasserkocher usw. Das Dickschicht-Heizelement wird aus einer Dickschichtpaste mit einem hohen ohmschen Widerstand hergestellt, die auf eine Trägerplatte aufgebracht wird. Um den Gegenstand bzw. die Flüssigkeit zu erwärmen, wird an die Dickschichtpaste eine Versorgungsspannung angelegt, und zwar in der Regel eine Netzspannung.To heat objects and liquids, thick-film heating elements are known use, for example, to heat water in a kettle, etc. The thick-film heating element is made of a thick film paste with a high ohmic Resistance produced, which is applied to a carrier plate. To the object or to heat the liquid, is a supply voltage to the thick-film paste created, and usually a mains voltage.
Die Aufgabe der Erfindung besteht darin, eine Vorrichtung mit einem Heizelement zu schaffen, bei der eine Versorgungsspannung für einen zusätzlichen Verbraucher einfach und kostengünstig abgreifbar ist. Die Aufgabe wird erfindungsgemäß durch die Merkmale der unabhängigen Ansprüche gelöst, während vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung den Unteransprüchen entnommen werden können.The object of the invention is to provide a device with a heating element create a supply voltage for an additional consumer easy and can be tapped inexpensively. The object is achieved by the features solved the independent claims, while advantageous embodiments and developments the invention can be taken from the dependent claims.
Bei Dickschicht-Heizelementen werden Kontaktflächen zum elektrischen Anschluß des Dickschicht-Heizelements generell benötigt. Die Kontaktflächen können gemeinsam mit dem Dickschicht-Heizelement in einem Verfahrensschritt kostengünstig hergestellt werden, beispielsweise in einem Siebdruckverfahren. Zusätzliche Kontaktflächen für eine weitere Versorgungsspannung bewirken keinen technologischen Mehraufwand.In thick-film heating elements contact surfaces for electrical connection of the Thick film heating element generally needed. The contact surfaces can be shared with the thick-film heating element are produced inexpensively in one process step, for example in a screen printing process. Additional contact surfaces for one further supply voltage cause no additional technological effort.
In einer vorteilhaften Ausgestaltung der Erfindung wird vorgeschlagen, das Dickschicht-Heizelement mit einem Hauptheizkreis und einem als Vorwiderstand dienenden zweiten Heizkreis auszuführen. Der zweite Heizkreis ist mit dem zusätzlichen Verbraucher in Reihe und gemeinsam mit diesem über die zusätzliche Kontaktfläche parallel zum Hauptheizkreis geschaltet. Die Verlustwärme am Vorwiderstand bzw. des zweiten Heizkreises wird auf die gleiche Weise abgegeben und genutzt wie die des Hauptheizkreises bzw. der Hauptwärmequelle. Der Vorwiderstand liefert somit einen Beitrag zur Gesamtheizleistung und erhöht den Wirkungsgrad der Vorrichtung. Der Vorwiderstand und die Hauptwärmequelle sind vorteilhaft aus dem gleichen Material und können kostengünstig in einem Verfahrensschritt hergestellt werden, beispielsweise mittels Siebdruck. Der Materialaufwand erhöht sich nur geringfügig. Werden mehrere unterschiedliche Versorgungsspannungen benötigt, können ferner durch die flexible Gestaltungsweise des Dickschicht-Heizelements mehrere unterschiedliche Vorwiderstände als Heizkreise integriert werden. In an advantageous embodiment of the invention is proposed, the thick-film heating element with a main heating circuit and serving as a resistor second Run the heating circuit. The second heating circuit is in series with the additional load and together with this over the additional contact surface parallel to the main heating circuit connected. The heat loss at the series resistor or the second heating circuit is delivered and used in the same way as the main heating circuit or the Main heat source. The series resistor thus contributes to the total heating power and increases the efficiency of the device. The series resistor and the main heat source are advantageous from the same material and can be cost effective in one Process step are prepared, for example by screen printing. The cost of materials increases only slightly. Becomes several different supply voltages may also be due to the flexible design of the thick-film heating element several different series resistors are integrated as heating circuits.
Anstatt einen Spannungsabfall über einen Vorwiderstand zu erzeugen, wird in einer Ausgestaltung der Erfindung vorgeschlagen, die zusätzliche Kontaktfläche elektrisch zwischen den zwei Kontaktflächen am Dickschicht-Heizelement anzuordnen und durch Spannungsteilung die zweite, niedrigere Versorgungsspannung an einer der zwei Kontaktflächen und an der zusätzlichen Kontaktfläche abzugreifen. Zusätzliches Material für einen Vorwiderstand kann eingespart werden.Instead of generating a voltage drop across a series resistor, in one embodiment proposed the invention, the additional contact surface electrically between to arrange the two contact surfaces on the thick-film heating element and through Voltage division the second, lower supply voltage at one of the two contact surfaces and tap off at the additional contact surface. Additional material for a series resistor can be saved.
Die Kontaktfläche kann direkt am Dickschicht-Heizelement in einem hochohmigen Bereich angeordnet werden. Eine üblicherweise auf dem Dickschicht-Heizelement aufgebrachte isolierende Schutzschicht muß in diesem Fall an den entsprechenden Kontaktflächen freigespart werden. Vorteilhaft wird jedoch die Kontaktfläche von einem niederohmigen Teil des Dickschicht-Heizelements gebildet, wodurch im Kontaktbereich geringere Temperaturen herrschen. Kontaktelemente und der Verbraucher können auf niedrigere Temperaturen und damit kostengünstiger ausgelegt werden. Die niederohmigen Kontaktflächen können von einem Bereich niederohmiger Dickschichtpaste oder von einem niederohmigen Leitungsstück gebildet werden. Niederohmige Leitungsstücke werden häufig verwendet, um einzelne Teile des Dickschicht-Heizelements miteinander zu verbinden. Wird eine derartige Verbindungsstelle zum Abgriff der zusätzlichen Versorgungsspannung genutzt, wird keine zusätzliche niederohmige Dickschichtpaste für die zusätzliche Kontaktfläche benötigt. Ferner ist der Widerstand vorteilhaft auf der gesamten niederohmigen Kontaktfläche weitgehend gleich, so daß bei unterschiedlichen Positionen auf der Kontaktfläche die gleiche Versorgungsspannung abgegriffen werden kann.The contact surface can directly on the thick-film heating element in a high-impedance region to be ordered. A commonly applied to the thick film heating element insulating protective layer must in this case at the corresponding contact surfaces be saved. However, the contact surface of a low-impedance is advantageous Part of the thick film heating element formed, whereby in the contact area lower Temperatures prevail. Contact elements and the consumer can on lower Temperatures and thus be designed more cost-effective. The low-resistance Contact surfaces can range from a range of low-resistance thick-film paste or one low-resistance line piece are formed. Be low-impedance line pieces commonly used to interconnect individual parts of the thick film heating element connect. If such a connection point for tapping the additional supply voltage used, no additional low-resistance thick-film paste for the additional contact surface needed. Furthermore, the resistance is advantageous throughout low resistance contact surface largely the same, so that at different positions on the contact surface, the same supply voltage can be tapped.
Ein Kontakt zwischen der zusätzlichen Kontaktfläche und dem zusätzlichen Verbraucher kann auf verschiedene, dem Fachmann als geeignet erscheinende Arten hergestellt werden, wie beispielsweise durch Löten, Kleben usw. Besonders vorteilhaft wird der Kontakt jedoch mit einer Kontaktfeder hergestellt. Der Verbraucher kann schnell und sauber angeschlossen und insbesondere wieder von der Kontaktfläche gelöst werden. Die Gefahr einer Verschmutzung durch Lot oder Klebstoff wird vermieden. Ferner werden häufig die Kontakte für die Versorgungsspannung des Dickschicht-Heizelements ebenfalls mit Kontaktfedern hergestellt. Es kann auf weitgehend bestehende und ausgereifte Bauteile zurückgegriffen werden. Ferner wird ein technologischer Mehraufwand vermieden. A contact between the additional contact surface and the additional consumer can be prepared in various ways that appear to be suitable to a person skilled in the art, such as by soldering, gluing, etc. Particularly advantageous is the contact but made with a contact spring. The consumer can connect quickly and cleanly and in particular be released again from the contact surface. The danger contamination by solder or adhesive is avoided. Furthermore, the Contacts for the supply voltage of the thick film heating element also with contact springs produced. It can be used on largely existing and mature components become. Furthermore, a technological extra effort is avoided.
Vorteilhaft ist zumindest ein Teil einer Haltevorrichtung für die Kontaktfeder mit einem vorhandenen Bauteil einstückig ausgeführt, beispielsweise eine Aufnahme in einem Bauteil, an dem bereits Kontaktfedern für die Versorgungsspannung des Dickschicht-Heizelements befestigt sind. In die Aufnahme kann beispielsweise ein Hersteller eines Wasserkochers seine eigene, entsprechend seiner konstruktiven Erfordernisse gestaltete Kontaktfeder einsetzen und befestigten, beispielsweise durch eine Rastverbindung usw. Zusätzliche Bauteile, Montageaufwand und Kosten können eingespart werden.It is advantageous at least a part of a holding device for the contact spring with a existing component integrally executed, for example, a recording in one Component on which already contact springs for the supply voltage of the thick film heating element are attached. In the recording, for example, a manufacturer of a Wasserkochers his own, designed according to its design requirements Insert contact spring and fastened, for example by a latching connection, etc. Additional components, assembly costs and costs can be saved.
Häufig besitzen Vorrichtungen mit einem Dickschicht-Heizelement eine Steuereinheit, die bestimmte Parameter der Vorrichtung und insbesondere des Dickschicht-Heizelements steuert, wie beispielsweise Temperatur, Zeit der Erwärmung usw. Die Steuereinheit besitzt einen Grundkörper, der vorteilhaft auf der Trägerplatte des Dickschicht-Heizelements oder an einem Bauteil im Bereich des Dickschicht-Heizelements befestigt ist. An dem Grundkörper sind häufig Kontaktfedern für die Versorgungsspannung des Dickschicht-Heizelements befestigt, so daß an diesem besonders vorteilhaft zumindest ein Teil der Haltevorrichtung für die zusätzliche Kontaktfeder integriert wird. In einer Ausgestaltung der Erfindung wird vorgeschlagen zumindest einen Teil der Haltevorrichtung für die zusätzliche Kontaktfeder gleichzeitig in einem formgebenden Verfahrensschritt des Grundkörpers, an diesen anzuformen, beispielsweise in einem Spritzgußverfahren. Zusätzliche Verfahrensschritte und Fertigungskosten können eingespart werden. Grundsätzlich können jedoch Teile der Haltevorrichtungen, beispielsweise Ausnehmungen, auch in nachträglichen Verfahrensschritten eingebracht werden, beispielsweise durch spanende Verfahren, wie Bohren, Fräsen usw.Often devices with a thick-film heating element have a control unit which certain parameters of the device and in particular the thick-film heating element controls, such as temperature, time of heating, etc. The control unit has a body advantageously on the support plate of the thick film heating element or attached to a component in the region of the thick film heating element. To the Base bodies are often contact springs for the supply voltage of the thick-film heating element attached, so that at this particularly advantageous at least part of Holding device for the additional contact spring is integrated. In one embodiment The invention proposes at least a part of the holding device for the additional Contact spring at the same time in a shaping step of the body, to be formed on these, for example in an injection molding process. additional Process steps and production costs can be saved. Basically you can However, parts of the holding devices, such as recesses, even in subsequent Procedural steps are introduced, for example by machining processes, like drilling, milling, etc.
Anstatt die Kontaktfeder beim Verbraucher der Steuereinheit, beispielsweise beim Hersteller eines Wasserkochers, zu montieren, kann diese beim Hersteller der Steuereinheit vormontiert werden. Aufgrund der hohen Gestaltungsflexibilität kann das Dickschicht-Heizelement einfach an die Position der Kontaktfeder angepaßt und eine zweite Versorgungsspannung erfindungsgemäß über einen Vorwiderstand und/oder über eine Spannungsteilung abgegriffen werden. Mit vormontierten Kontaktfedern stellt die Steuereinheit eine in sich geschlossene und leicht auf ihre Funktion überprüfbare Baugruppe dar, die einfach und schnell montiert und demontiert werden kann. Instead of the contact spring at the consumer of the control unit, for example, the manufacturer a kettle, this can be installed by 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 a voltage division be tapped. With pre-assembled contact springs provides the control unit a self-contained and easily verifiable on their function assembly, the easy and quick to assemble and disassemble.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawing an embodiment of the invention is shown. The drawing, the description and the claims include numerous features in combination. The expert The features will expediently consider individually and to meaningful further Combine combinations.
Es zeigen:
- 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.
- Fig. 1
- a circuit diagram of a device with a series resistor,
- Fig. 2
- a thick-film heating element on a carrier plate according to the circuit diagram of FIG. 1,
- Fig. 3
- a circuit diagram of a device with a voltage division and
- Fig. 4
- a thick-film heating element on a support plate according to the diagram of FIG. 3rd
Fig. 1 zeigt ein Schaltbild eines nicht näher dargestellten Wasserkochers mit einem Dickschicht-Heizelement
10, das über zwei Kontaktflächen 14, 16 (Fig. 2) mit einer Versorgungsspannung
18 versorgt wird. Das Dickschicht-Heizelement 10 besteht aus einzelnen
Bahnen Dickschichtpaste, die auf einer Trägerplatte 54 aufgebracht und über niederohmige
Leitungsstücke 42, 44, 46, 48, 50, 52 verbunden sind. Das Dickschicht-Heizelement
10 besitzt einen Hauptheizkreis 26 und einen als Vorwiderstand dienenden
zweiten Heizkreis 28 (Fig. 1 u. 2). Der zweite Heizkreis 28 besteht wie der Hauptheizkreis
26 aus einer Bahn Dickschichtpaste und ist mit einem Verbraucher 24 in Reihe und über
eine zusätzliche Kontaktfläche 20 parallel zum Hauptheizkreis 26 geschaltet. Der zweite
Heizkreis 28 ist dabei über das Leitungsstück 42 mit der Kontaktfläche 14 und über die
zusätzliche Kontaktfläche 20 und eine Kontaktfeder 32 mit einem in Fig. 2 nicht näher
dargestellten Verbraucher 24 (Fig. 1) verbunden, der wiederum mit der zweiten Kontaktfläche
16 verbunden ist. Eine zweite Versorgungsspannung für den Verbraucher 24 kann
einfach und kostengünstig am Dickschicht-Heizelement 10 abgegriffen werden und die
Heizleistung des zweiten Heizkreises 28 bzw. des Vorwiderstands wird zur Steigerung
des Wirkungsgrads des Wasserkochers genutzt.Fig. 1 shows a circuit diagram of a kettle not shown with a thick-
Über der Trägerplatte 54 ist eine Steuereinheit mit einem Grundkörper 40 angeordnet,
der über nicht näher dargestellte Befestigungsstützen auf der Trägerplatte 54 befestigt
ist. Die Kontakte für die Versorgungsspannung 18 für den Hauptheizkreis 26 sind über
zwei Kontaktfedern 56, 58 hergestellt, die am Grundkörper 40 befestigt sind. Die Kontaktfeder
32 zur zusätzlichen Kontaktfläche 20 ist ebenfalls über eine nicht näher dargestellte,
einstückig mit dem Grundkörper 40 ausgeführte Haltevorrichtung 36 am Grundkörper
40 befestigt. Zusätzliche Bauteile für eine Haltevorrichtung können eingespart
werden.Above the
Fig. 3 und 4 zeigt eine weitere Ausgestaltung der Erfindung, bei der eine zusätzliche
Kontaktfläche 22 elektrisch zwischen den zwei Kontaktflächen 14, 16 eines Dickschicht-Heizelements
12 angeordnet ist. Gleichbleibende Bauteile sind grundsätzlich mit den
gleichen Bezugszeichen beziffert. Durch Spannungsteilung ist eine zweite Versorgungsspannung
für den Verbraucher 24 an der Kontaktfläche 16 und an der zusätzlichen Kontaktfläche
22 abgreifbar. Das Dickschicht-Heizelement 12 besteht aus einzelnen auf die
Trägerplatte 54 aufgebrachte Bahnen Dickschichtpaste, die mit niederohmigen Leistungsstücken
30, 44, 48, 50, 52 verbunden sind. Die zusätzliche Kontaktfläche 22 ist
vom Leistungsstück 30 gebildet. Eine zusätzliche Kontaktfläche kann entfallen.Fig. 3 and 4 shows a further embodiment of the invention, in which an
Die Kontakte für die Versorgungsspannung 18 für das Dickschicht-Heizelement 12 sind
über zwei Kontaktfedern 56, 58 hergestellt, die am Grundkörper 40 der Steuereinheit befestigt
sind. Der Kontakt mit der zusätzlichen Kontaktfläche 22 wird über eine Kontaktfeder
34 hergestellt, die ebenfalls über eine nicht näher dargestellte, einstückig mit dem
Grundkörper 40 ausgeführte Haltevorrichtung 38 am Grundkörper 40 befestigt ist. The contacts for the
- 1010
- Dickschicht-HeizelemenThick film Heizelemen
- 1212
- Dickschicht-HeizelemenThick film Heizelemen
- 1414
- Kontaktflächecontact area
- 1616
- Kontaktflächecontact area
- 1818
- Versorgungsspannungsupply voltage
- 2020
- Kontaktflächecontact area
- 2222
- Kontaktflächecontact area
- 2424
- Verbraucherconsumer
- 2626
- HauptheizkreisHauptheizkreis
- 2828
- Heizkreisheating circuit
- 3030
- Leitungsstückline section
- 3232
- Kontaktfedercontact spring
- 3434
- Kontaktfedercontact spring
- 3636
- Haltevorrichtungholder
- 3838
- Haltevorrichtungholder
- 4040
- Grundkörperbody
- 4242
- Leitungsstückline section
- 4444
- Leitungsstückline section
- 4646
- Leitungsstückline section
- 4848
- Leitungsstückline section
- 5050
- Leitungsstückline section
- 5252
- Leitungsstückline section
- 5454
- Trägerplattesupport plate
- 5656
- Kontaktfedercontact spring
- 5858
- Kontaktfedercontact spring
Claims (9)
- Device with a thick film heating element (10, 12), which is supplied with a first supply voltage (18) by way of two contact surfaces (14, 16), characterised in that a second supply voltage for a further load (24) can be derived by way of at least one additional contact surface (20, 22) at the thick film heating element (10, 12).
- Device according to claim 1, characterised in that the thick film heating element (10) comprises a main heating circuit (26) and a second heating circuit (28) serving as a protective resistor, wherein the second heating circuit (28) is connected in series with the load (24) and, in common with this, in parallel with the main heating circuit (26) by way of the additional contact surface (20).
- Device according to claim 1, characterised in that the additional contact surface (22) is electrically arranged between the two contact surfaces (14, 16) at the thick film heating element (12) and the second supply voltage can be derived at one of the two contact surfaces (14, 16) and at the additional contact surface (22) by voltage division.
- Device according to claim 3, characterised in that the additional contact surface (22) is formed by a low resistance part of the thick film heating element (12).
- Device according to claim 4, characterised in that the low resistance part of the thick film heating element (12) is a conductor member (30).
- Device according to one of the preceding claims, characterised in that the contact with the additional contact surface (20, 22) is produced by way of a contact spring (32, 34).
- Device according to claim 6, characterised in that at least a part of a holding device (36, 38) for the contact spring (32, 34) is formed integrally with a component which is present.
- Device according to claim 7, characterised in that the component is a base body (40) of a control unit.
- Method of producing a base body (40) of a control unit for a device according to claim 8, characterised in that at least a part of the holding device (36, 38) for the additional contact spring (32, 34) is formed integrally in a shape-imparting method step of a base body (40) at the same time.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19903590 | 1999-01-29 | ||
| DE1999103590 DE19903590A1 (en) | 1999-01-29 | 1999-01-29 | Device with a thick-film heating element and method for its production |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1024680A2 EP1024680A2 (en) | 2000-08-02 |
| EP1024680A3 EP1024680A3 (en) | 2002-05-02 |
| EP1024680B1 true EP1024680B1 (en) | 2005-09-14 |
Family
ID=7895819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20000101111 Expired - Lifetime EP1024680B1 (en) | 1999-01-29 | 2000-01-20 | Device with thick film heater and its manufacturing process |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1024680B1 (en) |
| DE (2) | DE19903590A1 (en) |
| ES (1) | ES2249203T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10251872B3 (en) * | 2002-11-07 | 2004-02-05 | BSH Bosch und Siemens Hausgeräte GmbH | Water hardness control sensor device for domestic purposes, has sensor unit for acquiring a parameter, especially for controlling water hardening, and a unit for precipitating out dissolved lime in water sample |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3344872A1 (en) * | 1983-12-12 | 1985-06-20 | Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut | Voltage divider |
| JPH048557A (en) * | 1990-04-26 | 1992-01-13 | Toshiba Lighting & Technol Corp | Heater |
| US5288973A (en) * | 1991-12-28 | 1994-02-22 | Rohm Co., Ltd. | Heater for sheet material |
| DE4341035A1 (en) * | 1993-12-02 | 1995-06-08 | Ego Elektro Blanc & Fischer | Safe-condition monitoring unit for electrical load device |
| GB9302965D0 (en) * | 1993-02-15 | 1993-03-31 | Strix Ltd | Immersion heaters |
| DE19631477A1 (en) * | 1996-08-03 | 1998-02-05 | Bosch Gmbh Robert | Adjustable voltage divider arrangement manufactured in hybrid technology |
-
1999
- 1999-01-29 DE DE1999103590 patent/DE19903590A1/en not_active Withdrawn
-
2000
- 2000-01-20 ES ES00101111T patent/ES2249203T3/en not_active Expired - Lifetime
- 2000-01-20 DE DE50011144T patent/DE50011144D1/en not_active Expired - Lifetime
- 2000-01-20 EP EP20000101111 patent/EP1024680B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1024680A2 (en) | 2000-08-02 |
| DE50011144D1 (en) | 2005-10-20 |
| EP1024680A3 (en) | 2002-05-02 |
| DE19903590A1 (en) | 2000-08-03 |
| ES2249203T3 (en) | 2006-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1152639B2 (en) | Electrical heating unit, particularly for liquid supports | |
| EP0474795B1 (en) | Printed circuit board for a power electronic circuit | |
| AT402983B (en) | TEMPERATURE GUARD | |
| EP2455680B1 (en) | Electric continuous-flow heaters | |
| DE19522126C2 (en) | Electronic load switch for a motor vehicle, for example flasher unit | |
| EP3138162A1 (en) | High-current electrical circuit having a circuit board and a bus bar | |
| DE3824865A1 (en) | MANUFACTURE OF SOLAR AREAS | |
| EP0809094A1 (en) | Method for making a sensor device for temperature measurement | |
| EP1024680B1 (en) | Device with thick film heater and its manufacturing process | |
| EP1586223A1 (en) | Electrical connection element, especially for electric tool switches | |
| DE2951072C2 (en) | Transition from a coaxial component to a microwave circuit arranged on a substrate | |
| EP1523225B1 (en) | Heating assembly with PTC elements, particularly for motor vehicles | |
| DE3040867A1 (en) | SEMICONDUCTOR ADDITION AND METHOD FOR THEIR PRODUCTION | |
| DE112016005718B4 (en) | CARRIER FOR AN OPTOELECTRONIC DEVICE, METHOD FOR MANUFACTURING A CARRIER FOR AN OPTOELECTRONIC DEVICE, WAFER AND SOLDERING METHOD | |
| DE2843967B2 (en) | Series resistor component, in particular for heater fans for motor vehicles | |
| DE69716398T2 (en) | High energy and / or power dissolving resistance and manufacturing process | |
| DE102022122142B4 (en) | Method for controlling the heating of a heating loop of a steering wheel, associated arrangement and use | |
| DE3722726A1 (en) | HEATED STAMP | |
| EP1006755A2 (en) | Electrical cooktop | |
| EP1624739B1 (en) | Electric heating for motor vehicles | |
| DE3147494A1 (en) | Mirror which can be heated electrically | |
| DE102021112964A1 (en) | Current measurement arrangement with temperature effect compensation, its use in a motor vehicle and associated method for current measurement | |
| DE2251446C3 (en) | Brush for electrical machines | |
| WO2002071804A1 (en) | Ceramic cooking system comprising a glass ceramic plate, an insulation layer and heating elements | |
| DE10232821A1 (en) | Car fuel tank level sensor manufacturing process uses electroplating, sputtering, evaporation or chemical deposition through magnetically clamped mask |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Kind code of ref document: A2 Designated state(s): DE ES FR GB |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| RIC1 | Information provided on ipc code assigned before grant |
Free format text: 7H 05B 3/26 A, 7H 01C 17/24 B, 7G 01R 1/20 B |
|
| 17P | Request for examination filed |
Effective date: 20021104 |
|
| AKX | Designation fees paid |
Free format text: DE ES FR GB |
|
| 17Q | First examination report despatched |
Effective date: 20031008 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BSH BOSCH UND SIEMENS HAUSGERAETE GMBH |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20050928 |
|
| REF | Corresponds to: |
Ref document number: 50011144 Country of ref document: DE Date of ref document: 20051020 Kind code of ref document: P |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2249203 Country of ref document: ES Kind code of ref document: T3 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20060615 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 16 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R081 Ref document number: 50011144 Country of ref document: DE Owner name: BSH HAUSGERAETE GMBH, DE Free format text: FORMER OWNER: BSH BOSCH UND SIEMENS HAUSGERAETE GMBH, 81739 MUENCHEN, DE Effective date: 20150402 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: PC2A Owner name: BSH HAUSGERATE GMBH Effective date: 20150527 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD Owner name: BSH HAUSGERATE GMBH Effective date: 20151022 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20180201 Year of fee payment: 19 Ref country code: GB Payment date: 20180125 Year of fee payment: 19 Ref country code: DE Payment date: 20180131 Year of fee payment: 19 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20180124 Year of fee payment: 19 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50011144 Country of ref document: DE |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20190120 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190801 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190131 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190120 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20200310 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190121 |