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EP0114071B1 - Temperature control device - Google Patents

Temperature control device Download PDF

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Publication number
EP0114071B1
EP0114071B1 EP84100348A EP84100348A EP0114071B1 EP 0114071 B1 EP0114071 B1 EP 0114071B1 EP 84100348 A EP84100348 A EP 84100348A EP 84100348 A EP84100348 A EP 84100348A EP 0114071 B1 EP0114071 B1 EP 0114071B1
Authority
EP
European Patent Office
Prior art keywords
ptc
resistor
connecting tongue
spring strip
thermostat according
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
Application number
EP84100348A
Other languages
German (de)
French (fr)
Other versions
EP0114071A2 (en
EP0114071A3 (en
Inventor
Hanno Roller
Roland Starck
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.)
Eichenauer Heizelemente GmbH and Co KG
Original Assignee
Fritz Eichenauer GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6748950&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0114071(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fritz Eichenauer GmbH and Co KG filed Critical Fritz Eichenauer GmbH and Co KG
Publication of EP0114071A2 publication Critical patent/EP0114071A2/en
Publication of EP0114071A3 publication Critical patent/EP0114071A3/en
Application granted granted Critical
Publication of EP0114071B1 publication Critical patent/EP0114071B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/504—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by thermal means

Definitions

  • the invention relates to a temperature monitor with a fixed contact provided with a first connecting tongue and a movable contact cooperating therewith, connected to the associated second connecting tongue, with a bimetallic element lifting the moving contact from the fixed contact and with one of the two contacts mentioned formed switch contact connected in parallel PTC resistor, which rests on one of the connecting tongues and is held there by elastic clamping.
  • a generic temperature monitor is known from DE-A-2 113388.
  • the known temperature monitor is used in a housing, a PTC element being arranged in the insertion region of the housing between the two connecting lugs.
  • the PTC element can be held by an inserted spring.
  • the movable contact can be lifted off the fixed contact by being connected to the connecting tongue associated with it via the bimetal element.
  • the housing and thus the PTC element are sealed with a sealing compound.
  • the PTC element serves to keep the switch open after it has been brought into the open state by an overtemperature or an overcurrent of the device protected by it, as long as the power supply has not been switched off externally.
  • PTC elements are sensitive elements and can easily break. This can occur during use, but also during manufacture. For this reason, efforts are made to connect the sensitive PTC stone to the device to be protected as late as possible. This should also be possible in a simple and convenient manner. Furthermore, when a radiator provided with a temperature monitor is transported from the manufacturer of the same to the processor, who installs it, for example, in a hair dryer or in another electrical device, the PTC element can be damaged. The entire temperature monitor that is spotted or riveted must then be removed and replaced.
  • the invention has for its object to further develop a generic temperature monitor so that it can be used in electric radiators, responds quickly and its resistance element is replaceable in a simple and convenient manner, but is still reliably held on the contact wire to which it is applied .
  • the above object is achieved with a temperature monitor of the type mentioned at the outset in that the PTC resistance against the first connecting tongue is pressed by a spring strip attached to the second connecting tongue and projecting from there below the first connecting tongue, which in which the PTC resistor has a convex shape facing the PTC resistor on the connection lug area.
  • the configuration according to the invention can be achieved in a simple and convenient manner that the PTC stone is introduced into the temperature monitor only late and in particular only after it has been connected to an electric radiator, which is done by dots or rivets, especially if this is done automatically, a PTC brick, if it had been used earlier, could easily be damaged.
  • the invention allows damaged PTC elements to be replaced relatively easily and conveniently when transporting radiators provided with temperature monitors from the manufacturer to the processor, who install them in an electrical device.
  • the supplier of the radiator can immediately deliver a certain number of PTC elements separately to replace damage that can never be excluded. This prevents such damaged radiators from being sent back and forth between processors and manufacturers by simply replacing the stone. The same can if necessary.
  • Figure 1 shows an embodiment of the temperature monitor according to the invention in side view
  • Figure 2 shows a section through the
  • the open temperature monitor 1 shown in FIG. 1 without a housing has connection cables 2 which are fixed to an insulating part 3 of the temperature monitor 1.
  • There is also a contact arrangement which consists of a strip-shaped bimetal element 5 which is electrically connected to and held by a connecting tongue 2 and at the end of which a button-like movable contact 5 'is attached.
  • the contact 5 ' is assigned a fixed contact 4 which is fastened to the other connecting tongue 2'.
  • a spring strip 7 is fastened to the connecting tongue 2 by being punctured onto the connecting tongue 2 with a bent end 8.
  • the spring strip 7 projects from there to below the connecting tongue 2 ', wherein it is under the spring action directed towards the connecting tongue 2'.
  • a PTC resistance tablet 6 is arranged between the tongue 2 'and the spring strip 7.
  • the spring strip 7 has a convex shape 12 facing the PTC element 6.
  • the PTC element is thus simply pressed flat against the tongue 2 'and held under the spring action of the spring strip 7.
  • the PTC element 6 can tilt around the convex shape 12 and adjust such that it lies flat and flat against the tongue 2 'over the entire surface and horizontally. On the one hand, this results in optimal heat extraction and, on the other hand, optimal electrical contacting, so that the function of the temperature monitor is optimally guaranteed. Nevertheless, the PTC element can be exchanged easily and conveniently.
  • the temperature monitor 1 is in the manner shown in FIG. 3 in series with a consumer 9, such as a heater or the like. switched. From the circuit diagram of FIG. 3 it can be seen that the PTC element 6 is connected in parallel to the contact arrangement, that is to say bridges it. If current is now applied, it flows from a connecting tongue, for example 2, via the bimetallic element 5, the movable contact 5 'attached to it, to the fixed contact 4 and from there to the connecting tongue 2' and from there to the consumer 9, which then, for example is heated.
  • the bimetallic element 5 of the temperature monitor 1 opens, which - as usual - is arranged in the vicinity of the consumer 9, the contact arrangement 4, 5 ', so it lifts the movable contact 5 'from the fixed contact 4.
  • the current flow through the contact arrangement is therefore interrupted.
  • the PTC resistor also has such a low conductivity that practically no current flows through it to the consumer 9. The consumer 9 is no longer burdened and the temperature in the consumer drops.
  • the conductivity in the PTC element 6 increases, as a result of which the latter heats itself up and stabilizes with a low current flow and this corresponding heating, the temperature being released to the surroundings, in particular in the exemplary embodiment shown to the fixed contact 4 and from it radiating onto the bimetallic element 5 is such that the contact arrangement 4, 5 'remains open.
  • the consumer can therefore not be overloaded. A significant release of heat from the consumer or radiator 9 is therefore not possible. Only after the consumer 9 has been switched off by hand also no more current flows through the PTC element 6, so that it cools down and the bimetallic element 5 closes the contact arrangement 4, 5 'and the consumer after a certain time, in particular after checking the source of the error can be used again.
  • the current flowing through the PTC element 6 when the contact arrangement is open can be selected in a suitable manner.
  • the PTC element 6 is only clamped between the connecting lug 2 'and the spring strip 7, it can, if necessary, for example when the device in which the temperature monitor 1 is used , Vibrations, be attached even more securely.
  • the PTC element 6 can additionally be secured against slipping by a shrink tube enveloping it and the parts contacting it or a housing made of plastic.
  • the same parts are present as far as they are, with the same reference symbols as bisker.
  • the spring strip 7 pressing the PTC element 6 against the exclusion tongue 2 ' has a convex shape 12 below the PTC element, which rests only on the PTC element 6 and with which the spring strip 7 presses the PTC element 6 against the Terminal tongue 2 'presses.
  • the spring strip 7 is also molded into a cup-shaped plastic part, the mass of the plastic part 13 following the pattern 12 on its concave side, while the convex side of the pattern 12 lies freely inside the part 13 .
  • the PTC element is set here, ie it is held in the lateral direction by the cup-shaped design of the plastic part 13.
  • the spring strip 7 is fixed with its connecting part 8 at 14 on the connecting tongue 2.
  • the plastic used for part 13 is Ryton.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Thermistors And Varistors (AREA)
  • Control Of Temperature (AREA)

Description

Die Erfindung betrifft einen Temperaturwächter mit einem mit einer ersten Anschlußzunge versehenen feststehenden Kontakt und einem mit diesem zusammenwirkenden, mit der ihm zugehörigen zweiten Anschlußzunge verbundenen beweglichen Kontakt, mit einem den beweglichen Kontakt vom feststehenden Kontakt abhebenden Bimetallelement und mit einem zu dem aus den beiden genannten Kontakten gebildeten Schaltkontakt parallel geschalteten PTC-Widerstand, der an einer der Anschlußzungen anliegt und dort durch elastische Klemmung gehalten ist.The invention relates to a temperature monitor with a fixed contact provided with a first connecting tongue and a movable contact cooperating therewith, connected to the associated second connecting tongue, with a bimetallic element lifting the moving contact from the fixed contact and with one of the two contacts mentioned formed switch contact connected in parallel PTC resistor, which rests on one of the connecting tongues and is held there by elastic clamping.

Ein gattungsgemäßer Temperaturwächter ist aus der DE-A-2 113388 bekannt. Der bekannte Temperaturwächter ist in einem Gehäuse eingesetzt, wobei im Einschubbereich des Gehäuses zwischen den beiden Anschlußlaschen ein PTC-Element angeordnet ist. Das PTC-Element kann weiter durch eine eingelegte Feder gehalten werden. Der bewegliche Kontakt ist vom feststehenden Kontakt abhebbar, indem er über das Bimetallelement mit der ihm zugehörigen Anschlußzunge verbunden ist.A generic temperature monitor is known from DE-A-2 113388. The known temperature monitor is used in a housing, a PTC element being arranged in the insertion region of the housing between the two connecting lugs. The PTC element can be held by an inserted spring. The movable contact can be lifted off the fixed contact by being connected to the connecting tongue associated with it via the bimetal element.

Das Gehäuse und damit das PTC-Element sind mit einer Abdichtmasse abgedichtet. Das PTC-Element dient dazu, den Schalter, nachdem dieser durch eine Übertemperatur oder einen Überstrom des durch ihn geschützten Geräts in den Öffnungszustand gebracht worden ist, offen zu halten, solange nicht die Stromzufuhr extern abgestellt wurde.The housing and thus the PTC element are sealed with a sealing compound. The PTC element serves to keep the switch open after it has been brought into the open state by an overtemperature or an overcurrent of the device protected by it, as long as the power supply has not been switched off externally.

Abgesehen davon, daß die Eindichtung eines PTC-Steines diesen in seinem Verhalten und seiner Kennlinie nachteilig verändern kann, so daß die ursprünglich vorgesehene Funktion nicht mehr gewährleistet ist, sind PTC-Elemente empfindliche Elemente und können leicht brechen. Dies kann während des Gebrauchs, aber auch schon während der Herstellung auftreten. Aus diesem Grunde ist man bestrebt, den empfindlichen PTC-Stein erst möglichst spät mit dem zu schützenden Gerät in Verbindung zu bringen. Auch soll dies in einfacher und bequemer Weise geschehen können. Weiterhin kann es beim Transport eines mit einem Temperaturwächter versehenen Heizkörpers vom Hersteller desselben zum Weiterverarbeiter, der diesen beispielsweise in einen Fön oder in ein sonstiges elektrisches Gerät einbaut, zu einer Beschädigung des PTC-Elements kommen. Es muß dann der gesamte Temperaturwächter, der angepunktet oder angenietet ist, entfernt und ausgetauscht werden.Apart from the fact that the sealing of a PTC stone can adversely change its behavior and characteristic curve, so that the originally intended function is no longer guaranteed, PTC elements are sensitive elements and can easily break. This can occur during use, but also during manufacture. For this reason, efforts are made to connect the sensitive PTC stone to the device to be protected as late as possible. This should also be possible in a simple and convenient manner. Furthermore, when a radiator provided with a temperature monitor is transported from the manufacturer of the same to the processor, who installs it, for example, in a hair dryer or in another electrical device, the PTC element can be damaged. The entire temperature monitor that is spotted or riveted must then be removed and replaced.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Temperaturwächter derart weiter zu entwickeln, daß er bei elektrischen Heizkörpern einsetzbar ist, schnell anspricht und sein Widerstandselement in einfacher und bequemer Weise auswechselbar ist, dennoch aber zuverlässig an der Kontaktzuuge, an der es anliegt, gehalten ist.The invention has for its object to further develop a generic temperature monitor so that it can be used in electric radiators, responds quickly and its resistance element is replaceable in a simple and convenient manner, but is still reliably held on the contact wire to which it is applied .

Erfindungsgemäß wird die genannte Aufgabe bei einem Temperaturwächter der eingangs genannten Art dadurch gelöst, daß der PTC-Widerstand gegen die erste Anschlußzunge durch einen an der zweiten Anschlußzunge befestigten, von dort unterhalb die erste Anschlußzunge ragenden Federstreifen gedrückt wird, der in dem den PTC-Widerstand an die Anschlußlasche andrückenden Bereich eine dem PTC-Widerstand zugewandte konvexe Ausprägung aufweist.According to the invention, the above object is achieved with a temperature monitor of the type mentioned at the outset in that the PTC resistance against the first connecting tongue is pressed by a spring strip attached to the second connecting tongue and projecting from there below the first connecting tongue, which in which the PTC resistor has a convex shape facing the PTC resistor on the connection lug area.

Durch die erfindungsgemäße Ausgestaltung kann in einfacher und bequemer Weise erreicht werden, daß der PTC-Stein erst spät und insbesondere erst dann in den Temperaturwächter eingebracht wird, nachdem dieser mit einem elektrischen Heizkörper verbunden ist, was durch Punkten oder Nieten erfolgt, wobei, insbesondere wenn dies automatisiert erfolgt, ein PTC-Stein, wenn er schon früher eingesetzt worden wäre, leicht beschädigt werden könnte. Darüberhinaus erlaubt die Erfindung, daß möglicherweise beim Transport von mit Temperaturwächtern versehenen Heizkörpern vom Hersteller zum Weiterverarbeiter, die diese in ein elektrisches Gerät einbauen, beschädigte PTC-Elemente relativ einfach und bequem ausgetauscht werden können. Hierzu kann der Lieferer des Heizkörpers sogleich eine gewisse Anzahl PTC-Elemente separat zum Ersatz von nie auszuschließenden Beschädigungen mitliefern. Hierdurch wird ein Hin- und Hersenden derartiger beschädigter Heizkörper zwischen Weiterverarbeiter und Hersteller vermieden, indem einfach ein Austausch des Steines erfolgt. Gleiches kann ggfls. auch bei beim Endnutzer beschädigten Geräten geschehen, wodurch die Gewährung von Garantieleistungen vereinfacht wird. Die trotz dieser Auswechselbarkeit zuverlässige Auskopplung der durch das PTC-Element erzeugten Wärme wird durch die konvexe Ausprägung des das PTC-Element gegen eine Anschlußzunge drückenden Federstreifen erreicht, wodurch das PTC-Element gegen diesen eben angedrückt wird, was für die optimale Auskopplung der Warme wichtig ist.The configuration according to the invention can be achieved in a simple and convenient manner that the PTC stone is introduced into the temperature monitor only late and in particular only after it has been connected to an electric radiator, which is done by dots or rivets, especially if this is done automatically, a PTC brick, if it had been used earlier, could easily be damaged. In addition, the invention allows damaged PTC elements to be replaced relatively easily and conveniently when transporting radiators provided with temperature monitors from the manufacturer to the processor, who install them in an electrical device. For this purpose, the supplier of the radiator can immediately deliver a certain number of PTC elements separately to replace damage that can never be excluded. This prevents such damaged radiators from being sent back and forth between processors and manufacturers by simply replacing the stone. The same can if necessary. also happen to devices damaged by the end user, which simplifies the granting of warranty services. The reliable decoupling of the heat generated by the PTC element despite this interchangeability is achieved by the convex shape of the spring strip pressing the PTC element against a connecting tongue, as a result of which the PTC element is pressed against it, which is important for the optimal decoupling of the heat is.

Weiter bildungen der Erfindung ergeben sich aus den Unteransprüchen. Ein Ausfühungsbeispiel des erfindungsgemäßen Temperaturwächters wird nach stekend im einzelnen erläutert. Dabei zeigt:Further developments of the invention emerge from the subclaims. An exemplary embodiment of the temperature monitor according to the invention is explained in detail after rising. It shows:

Figur 1 eine Ausführungsform des erfindungsgemäßen Temperaturwächters in Seitenansicht;Figure 1 shows an embodiment of the temperature monitor according to the invention in side view;

Figur 2 einen Schnitt durch dieFigure 2 shows a section through the

Ausführungsform in der Fig. 1 entlang der Linie 11 - II;

  • Figur 3 ein Schaltbild eines Temperaturwächters Zusammen mit einem Verbracher;
  • Figur 4 eine Ausgestaltung des erfindungsgemäßen Temperaturwächters;
  • Figur 5 einen Teil der Ausgestaltung nach Fig. 4 im Längsschnitt; und
  • Figur 6 einen Schnitt entlang XI -XI der Fig. 5.
Embodiment in Figure 1 along the line 11 - II.
  • Figure 3 is a circuit diagram of a temperature monitor together with a combustor;
  • Figure 4 shows an embodiment of the temperature monitor according to the invention;
  • Figure 5 shows part of the embodiment of Figure 4 in longitudinal section. and
  • 6 shows a section along XI -XI of FIG. 5.

Der in der Fig. 1 dargestellte offene Temperaturwächter 1 ohne Gehäuse weist Anschlußzuugen 2 auf, die an einem Isolierteil 3 des Temperaturwächters 1 festgelegt sind. Es ist weiterhin eine Kontaktanordnung vorhanden, die aus einem mit einer Anschlußzunge 2 elektrisch verbundenen und durch diese gehaltenen streifenförmigen Bimetallelement 5 besteht, an dessen Ende ein knopfartiger beweglicher Kontakt 5' befestigt ist. Dem Kontakt 5' ist ein feststehender Kontakt 4 zugeordnet, der an der anderen Anschtußzunge 2' befestigt ist. An der Anschlußzunge 2 ist ein Federstreifen 7 befestigt, indem er mit einem umgebogeuen Ende 8 auf die Anschtßzunge 2 aufgepunktet ist. Der Federstreifen 7 ragt von dort bis unterhalb Anschlußzunge 2', wobei er unter auf die Anschlußzunge 2' hin gerichteter Federwirkung steht.The open temperature monitor 1 shown in FIG. 1 without a housing has connection cables 2 which are fixed to an insulating part 3 of the temperature monitor 1. There is also a contact arrangement which consists of a strip-shaped bimetal element 5 which is electrically connected to and held by a connecting tongue 2 and at the end of which a button-like movable contact 5 'is attached. The contact 5 'is assigned a fixed contact 4 which is fastened to the other connecting tongue 2'. A spring strip 7 is fastened to the connecting tongue 2 by being punctured onto the connecting tongue 2 with a bent end 8. The spring strip 7 projects from there to below the connecting tongue 2 ', wherein it is under the spring action directed towards the connecting tongue 2'.

Zwischen der Zunge 2' und dem Federstreifen 7 ist eine PTC-Widerstandstablette 6 angeordnet. Der Federstreifen 7 weist eine dem PTC-Element 6 zugewandte konvexe Ausprägung 12 auf. Das PTC-Element wird so lediglich unter der Federwirkung des Federstreifens 7 flach gegen die Zunge 2' gedrückt und festgehalten. Das PTC-Element 6 kann um die konvexe Ausprägung 12 derart kippen und sich einstellen, daß es eben und flach an der Zunge 2' vollflächig und waagerecht anliegt. Dies ergibt einerseits eine optimale Wärmeauskopplung und andererseits eine optimale elektrische Kontaktierung, so daß die Funktion des Temperaturwächters bestens gewährleistet ist. Dennoch bleibt eine einfache und bequeme Austauschbarkeit des PTC-Elements gewährleistet.A PTC resistance tablet 6 is arranged between the tongue 2 'and the spring strip 7. The spring strip 7 has a convex shape 12 facing the PTC element 6. The PTC element is thus simply pressed flat against the tongue 2 'and held under the spring action of the spring strip 7. The PTC element 6 can tilt around the convex shape 12 and adjust such that it lies flat and flat against the tongue 2 'over the entire surface and horizontally. On the one hand, this results in optimal heat extraction and, on the other hand, optimal electrical contacting, so that the function of the temperature monitor is optimally guaranteed. Nevertheless, the PTC element can be exchanged easily and conveniently.

Der Temperaurwächter 1 wird in der aus der Fig. 3 ersichtlichen Weise in Reihe mit einem Verbraucher 9, wie einem Heizgerät od.dgl. geschaltet. Aus der Schaltskizze der Fig. 3 ist ersichtlich, daß das PTC-Element 6 zur Kontaktanordnung parallel geschaltet ist, diese also überbrückt. Wird nun Strom angelegt, so fließt dieser von einer Anschlußzunge, beispielsweise 2, über das Bimetallelement 5, den an diesem befestigten beweglichen Kontakt 5', zum feststehenden Kontakt 4 und von diesem zur Anschlußzunge 2' und von dort zum Verbraucher 9, der dann beispielsweise beheizt wird. Tritt nun ein Fehler auf, beispielsweise wird der Verbraucher 9 über eine gewisse Grenze hinaus überhitzt, so öffnet das Bimetallelement 5 des Temperaturwächters 1, der - wie üblich - in der Nachbarschaft zum Verbraucher 9 angeordnet wird, die Kontaktanordnung 4, 5', hebt also den beweglichen Kontakt 5' vom feststehenden Kontakt 4 ab. Der Stromfluß durch die Kontaktanordnung wird daher unterbrochen. Aufgrund der vom Verbraucher 9 abgegebenen Umgebungswärme hat auch der PTC-Widerstand eine solch geringe Leitfähigkeit, daß über ihn Praktisch kein Strom mehr zum Verbraucher 9 fließt. Der Verbraucher 9 wird so nicht mehr belastet und die Temperatur im Verbraucher sinkt ab. Mit Absinken der Temperatur erhöht sich aber die Leitfähigkeit im PTC-Element 6, wodurch sich dieses selbst erwärmt und sich mit einem geringen Stromfluß und diesem entsprechender Erwärmung stabilisiert, wobei die Temperaturabgabe an die Umgebung, insbesondere im dargestellten Ausführungsbeispiel zum feststehenden Kontakt 4 und von diesem abstrahlend auf das Bimetallelement 5 derart ist, daß die Kontaktanordnung 4, 5' weiterhin geöffnet bleibt.The temperature monitor 1 is in the manner shown in FIG. 3 in series with a consumer 9, such as a heater or the like. switched. From the circuit diagram of FIG. 3 it can be seen that the PTC element 6 is connected in parallel to the contact arrangement, that is to say bridges it. If current is now applied, it flows from a connecting tongue, for example 2, via the bimetallic element 5, the movable contact 5 'attached to it, to the fixed contact 4 and from there to the connecting tongue 2' and from there to the consumer 9, which then, for example is heated. If an error now occurs, for example the consumer 9 is overheated beyond a certain limit, the bimetallic element 5 of the temperature monitor 1 opens, which - as usual - is arranged in the vicinity of the consumer 9, the contact arrangement 4, 5 ', so it lifts the movable contact 5 'from the fixed contact 4. The current flow through the contact arrangement is therefore interrupted. Because of the ambient heat given off by the consumer 9, the PTC resistor also has such a low conductivity that practically no current flows through it to the consumer 9. The consumer 9 is no longer burdened and the temperature in the consumer drops. As the temperature drops, however, the conductivity in the PTC element 6 increases, as a result of which the latter heats itself up and stabilizes with a low current flow and this corresponding heating, the temperature being released to the surroundings, in particular in the exemplary embodiment shown to the fixed contact 4 and from it radiating onto the bimetallic element 5 is such that the contact arrangement 4, 5 'remains open.

Der Verbraucher kann daher nicht überlastet werden. Eine nennenswerte Abgabe von Wärme vom Verbraucher oder Heizkörper 9 ist daher nicht möglich. Erst nach Abschalten des Verbrauchers 9 von Hand fließt auch durch das PTC-Element 6 kein Strom mehr, so daß dieses sich abkühlt und das Bimetallelement 5 die Kontaktanordnung 4, 5' schlieBt und der Verbraucher nach einer gewissen Zeit, insbesondere nach einer Überprüfung der Fehlerquelle wieder genutzt werden kann. Der bei geöffneter Kontaktanordnung durch das PTC-Element 6 erfolgende Stromfluß kann dabei in geeigneter Weise gewählt werden.The consumer can therefore not be overloaded. A significant release of heat from the consumer or radiator 9 is therefore not possible. Only after the consumer 9 has been switched off by hand also no more current flows through the PTC element 6, so that it cools down and the bimetallic element 5 closes the contact arrangement 4, 5 'and the consumer after a certain time, in particular after checking the source of the error can be used again. The current flowing through the PTC element 6 when the contact arrangement is open can be selected in a suitable manner.

Während bei der Ausgestaltung nach den Fig. 1 und 2 das PTC-Element 6 lediglich zwischen der Anschlußlasche 2' und des Federstreifens 7 festgeklemmt ist, kann es, falls dies notwendig ist, beispielsweise dann wenn das Gerät, in dem der Temperaturwächter 1 eingesetzt wird, Erschütterungen ausgesetzt wird, noch sicherer befestigt sein. Das PTC-Element 6 kann gegen Verrutschen zusätzlich durch einen ihn und die ihn kontaktierenden Teile umhüllenden Schrumpfschlauch oder ein Gehäuse aus Kunststoff gesichert sein.1 and 2, the PTC element 6 is only clamped between the connecting lug 2 'and the spring strip 7, it can, if necessary, for example when the device in which the temperature monitor 1 is used , Vibrations, be attached even more securely. The PTC element 6 can additionally be secured against slipping by a shrink tube enveloping it and the parts contacting it or a housing made of plastic.

Ju der Ausgestaltung den Figuren 4 bis 6 sind joweit gleiche Teile vorhanden sind, diese mit gleichen Bezugszeichen wie bisker bezeichnet. Auch hier weist der das PTC-Element 6 gegen die Auschlußzunge 2' drückende Federstreifen 7 unterhalb des PTC-Elements eine konvexe Ausprägung 12 auf, die einzig an dem PTC-Element 6 anliegt und mit der der Federstreifen 7 das PTC-Element 6 gegen die Anschlußzunge 2' drückt. Bei der Ausgestaltung nach den Figuren 4 bis 6 ist weiterhin der Federstreifen 7 in ein topfförmiges Kunststoffteil eingeformt, wobei einerseits die Masse des Kunststoffteils 13 der Ausprägung 12 auf deren konkaver Seite folgt, während die konvexe Seite der Ausprägung 12 frei im Inneren des Teils 13 liegt. Hieramf ist das PTC-Element gesetzt, is wird also durch die topfförmig Ausgestaltung des Kunststoffteils 13 in seitlicher Richtung gehalten. Der Federstreifen 7 ist mit seinem Anschlußteil 8 bei 14 an der Anschlußzunge 2 festgepunktet. Der für das Teil 13 verwendete Kunstoff ist Ryton.According to the embodiment in FIGS. 4 to 6, the same parts are present as far as they are, with the same reference symbols as bisker. Here, too, the spring strip 7 pressing the PTC element 6 against the exclusion tongue 2 'has a convex shape 12 below the PTC element, which rests only on the PTC element 6 and with which the spring strip 7 presses the PTC element 6 against the Terminal tongue 2 'presses. In the embodiment according to FIGS. 4 to 6, the spring strip 7 is also molded into a cup-shaped plastic part, the mass of the plastic part 13 following the pattern 12 on its concave side, while the convex side of the pattern 12 lies freely inside the part 13 . The PTC element is set here, ie it is held in the lateral direction by the cup-shaped design of the plastic part 13. The spring strip 7 is fixed with its connecting part 8 at 14 on the connecting tongue 2. The plastic used for part 13 is Ryton.

Claims (7)

1. Thermostat with a fixed contact (4) provided with a first connecting tongue (2') and with a movable contact (5') cooperating therewith and connected to its associated second connecting tongue (3), with a bimetallic element (5) raising the movable contact from the fixed contact and with a PTC-resistor (6) connected in parallel to the switching contact formed from said two contacts (4, 5'), said resistor engaging against one of the connecting tongues (2') and is held there by elastic clamping, characterized in that the PTC-resistor (6) is pressed against the first connecting tongue (2') by a spring strip (7) fixed to the second connecting tongue (2) and projecting from there below the first connecting tongue (2'), said spring strip having in the area pressing the PTC-resistor (6) against connecting tongues (2'), a convex stamped out portion (12) facing the PTC-resistor (6).
2. Thermostat according to claim 1, characterized in that the spring strip (7) is spot- welded with a downwardly bent end (8) to a connecting tongue (2) or (2').
3. Thermostat according to claims 1 or 2, characterized in that the spring strip (7) is made from stainless spring steel.
4. Thermostat according to one of the preceding claims, characterized in that a shrinkage hose (10) embraces a connecting tongue (2) or (2'), the PTC-resistor (6) and one end of the spring strip (7).
5. Thermostat according to one of the claims 1 to 3, characterized in that the PTC-resistor is laterally fixed by means of a cup-shaped plastic part (13).
6. Thermostat according to claim 5, characterized in that the plastic part (13) is heat- resistant.
7. Thermostat according to claims 5 or 6, characterized in that the material of the plastic part (13) follows the stamped out portion (12) of spring strip (7) on the concave side thereof, whilst the convex side of the stamped out portion (12) is located free in the interior of holding part (13).
EP84100348A 1983-01-15 1984-01-14 Temperature control device Expired EP0114071B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8300960U DE8300960U1 (en) 1983-01-15 1983-01-15 Temperature monitor
DE8300960U 1983-01-15

Publications (3)

Publication Number Publication Date
EP0114071A2 EP0114071A2 (en) 1984-07-25
EP0114071A3 EP0114071A3 (en) 1984-08-15
EP0114071B1 true EP0114071B1 (en) 1988-07-20

Family

ID=6748950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100348A Expired EP0114071B1 (en) 1983-01-15 1984-01-14 Temperature control device

Country Status (5)

Country Link
US (1) US4580123A (en)
EP (1) EP0114071B1 (en)
DE (2) DE8300960U1 (en)
ES (1) ES276817Y (en)
WO (1) WO1986004453A1 (en)

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DE3333620A1 (en) * 1983-09-17 1985-04-11 Braun Ag, 6000 Frankfurt CIRCUIT BREAKER
DE3447237A1 (en) * 1984-12-22 1986-06-26 Braun Ag, 6000 Frankfurt ELECTRIC COFFEE MAKER WITH WARM HOLDING PLATE
DE3522546A1 (en) * 1985-06-24 1987-01-02 Bosch Siemens Hausgeraete CIRCUIT ARRANGEMENT IN ELECTRIC OVENS FOR HEATING POWER CONTROL
EP0226663A1 (en) * 1985-11-08 1987-07-01 Texas Instruments Holland B.V. Thermostat
FR2612684A1 (en) * 1987-03-16 1988-09-23 Degois Cie Ets Improved electric blanket
DE3710672C2 (en) * 1987-03-31 1997-05-15 Hofsaes Geb Zeitz Ulrika Temperature monitor with a housing
GB2252674B (en) * 1991-01-04 1995-01-04 Otter Controls Ltd Improvements relating to thermally responsive electric switches
US5262749A (en) * 1992-03-16 1993-11-16 Opti-Lume Industries, Inc. Electrical safety device
JPH05282977A (en) * 1992-03-30 1993-10-29 Texas Instr Japan Ltd Overcurrent protecting device
DE4237546C2 (en) * 1992-11-06 2003-10-16 Behr Thermot Tronik Gmbh Electrical switching device
DE19727197C2 (en) * 1997-06-26 1999-10-21 Marcel Hofsaess Temperature-dependent switch with contact bridge
DE19816807C2 (en) * 1998-04-16 2000-06-08 Thermik Geraetebau Gmbh Temperature-dependent switch
US5995350A (en) * 1998-06-24 1999-11-30 Kopelman; Robert Z. Temperature controlled circuit interrupter
JP4471479B2 (en) * 2000-10-13 2010-06-02 ウチヤ・サーモスタット株式会社 Thermal protector
JP4050098B2 (en) * 2002-06-11 2008-02-20 ウチヤ・サーモスタット株式会社 DC current cutoff switch
DE102004017624A1 (en) * 2004-01-30 2005-08-18 Danfoss Compressors Gmbh Starter for line start electric motor, has run capacitor connecting start capacitor and positive temperature coefficient-thermistor in parallel, where start capacitor and thermistor are connected in series with switch mechanism

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Also Published As

Publication number Publication date
US4580123A (en) 1986-04-01
WO1986004453A1 (en) 1986-07-31
DE3472854D1 (en) 1988-08-25
ES276817Y (en) 1985-02-01
EP0114071A2 (en) 1984-07-25
ES276817U (en) 1984-06-16
EP0114071A3 (en) 1984-08-15
DE8300960U1 (en) 1983-06-09

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