EP0481355B1 - Switching mechanism with an apparatus for controlling the influence of ambient characteristics - Google Patents

Switching mechanism with an apparatus for controlling the influence of ambient characteristics Download PDF

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Publication number
EP0481355B1
EP0481355B1 EP91117265A EP91117265A EP0481355B1 EP 0481355 B1 EP0481355 B1 EP 0481355B1 EP 91117265 A EP91117265 A EP 91117265A EP 91117265 A EP91117265 A EP 91117265A EP 0481355 B1 EP0481355 B1 EP 0481355B1
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EP
European Patent Office
Prior art keywords
ambient temperature
correcting
spring
temperature sensor
switching mechanism
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
Application number
EP91117265A
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German (de)
French (fr)
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EP0481355A2 (en
EP0481355A3 (en
Inventor
Robert Kicherer
Siegfried Mannuss
Willi Reichert
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EGO Elektro Geraete AG
Original Assignee
EGO Elektro Geraete AG
EGO Elektro Gerate Blanc und Fischer GmbH
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Publication of EP0481355A2 publication Critical patent/EP0481355A2/en
Publication of EP0481355A3 publication Critical patent/EP0481355A3/en
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Publication of EP0481355B1 publication Critical patent/EP0481355B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/10—Compensation for variation of ambient temperature or pressure

Definitions

  • the invention relates to a switching device with a control device according to the preamble of claim 1.
  • the device is suitable for devices whose working characteristics are influenced or are to be influenced by their ambient temperature.
  • Such switching devices can e.g. Switches, regulators, control devices or the like. Which are used so that they are exposed to changing ambient temperatures.
  • Operating switching devices of electrical heating devices are usually relatively close to the heating to be operated with them on the back of a switch panel and can thus be heated from room temperature, e.g. around 20 ° C, to relatively high temperatures, e.g. around 125 ° C .
  • the switching characteristics of their switching device can be misaligned, for example influenced in such a way that certain switch positions to be set manually lead to completely different heating outputs than intended.
  • the control device is expediently used to compensate for the influence of the ambient temperature. Overcompensation can then occur, for example, at high ambient temperatures, which means that the full output is already achieved with a device setting that is below the setting value for this maximum output.
  • a resilient ambient temperature compensation can be found in EP-A-0 057 460, wherein a cranked, rigid cam of the ambient temperature sensor can run up against a resilient stop which is arranged on a snap switch carrier of the switching device. This correction spring is only effective when the working movement caused by the ambient temperature sensor has largely been carried out.
  • the invention is furthermore based on the object of creating a switching device or a device of the type mentioned, with which disadvantages of known designs or the type described can be avoided and which, in particular, over a relatively large working distance of at least one associated ambient temperature sensor allows precise control of its control characteristics.
  • the training according to the invention is particularly suitable for power control devices according to DE-OS 36 39 186, to which reference is made for further details and effects.
  • Switching devices of this type supply the energy to the heating in periodic pulses, the relative operating time in percent being determined by the total of the operating times divided by the total time and being manually adjustable.
  • a control heating that is switched on and off periodically with the pulses acts on a work sensor or a working bimetal which periodically actuates at least one work contact, such as a snap switch, via a contact spring.
  • the correction device is therefore expediently designed such that it counteracts, with a spring separate from the other springs mentioned in the switching device, that working movement of the ambient temperature sensor which results when the ambient temperature increases.
  • the spring force advantageously increases substantially steadily with increasing commute.
  • This working movement of the ambient temperature sensor is expediently opposite to the corresponding movement of the working sensor in order to achieve the desired compensation effect in a simple manner.
  • the ambient temperature sensor is expediently not free to move over all occurring ambient temperatures or against spring force, but rather is stop-limited above a predetermined ambient temperature and / or above a certain relative duty cycle, so that at least a further deflection is then reduced and the relative duty cycle is shifted upwards positive locking of at least part of the sensor is prevented.
  • the design according to the invention makes it possible to achieve the same characteristic curves for the relative duty cycle in relation to essentially every manual device setting in the event of relatively large differences in the ambient temperature between, for example, about 25 ° C. and 125 ° C. This makes the use value very simple and inexpensive to manufacture, electromechanical power control devices significantly increased.
  • the correction device is not made up of several springs, but only by a single spring, e.g. a flat spring, and possibly a stop is formed. If the spring is arranged directly between an outer surface of the ambient temperature sensor and a spring abutment, the latter can simultaneously form the stop for the travel limitation of the sensor.
  • a device base essentially rigidly with a carrier, e.g. by inserting the carrier into corresponding holder openings in a base housing.
  • the carrier can in a simple manner simultaneously form the abutment or the stop and, with the two devices, lie in a space-saving manner in a recessed housing corner of the base of the device.
  • the spring is essentially formed in one piece by an existing component of the device, so that no additional component is required.
  • the spring can be punched out tongue-like out of a securing member for an adjusting member.
  • the device 1 is arranged on a power control device 2 which, in a housing-shaped base body 3, has a power switch 4 actuated by a switching device 5 for electrically heating an electric hotplate or the like.
  • the switch 4 has a movable contact 6, which interacts by a clocking movement with a fixed contact 7, which is arranged on a contact carrier 9 via a snap spring 8 and whose relative operating time can be changed by pivoting the contact carrier 9 about a joint 10.
  • a switching cam 11 of a work sensor 12 engages on an end of the snap spring 8 remote from the contact 6, which cam is deflected in opposite directions by clocked heating with a control heater 13.
  • the control heater 13 attached to the work sensor 12 is connected at its end associated with the switching cam 11 via a sliding and resilient connection contact 14 and at the other end via a joint 15 to a circuit which carries the work sensor 12 pivotably about an axis approximately parallel to the joint 10 .
  • the switch 4 and the switching device 5 or the snap spring 8, the contact carrier 9, the working sensor 12 and / or the control heater 13 each define a plane approximately parallel to the associated joint 10 or 15 and / or to one another.
  • a circumferential cam cam acts on the contact carrier 9 as an actuator 16 of an actuating device, which cam cam is arranged on a manually operable actuating shaft 17 and with which the contact 6 can be continuously adjusted to different power levels apart from an open switch-off position can.
  • the joints 10, 15 are formed by spring joints which press the carrier 9 with a running cam against the actuator 16 and the switching cam 11 formed in one piece with the working sensor 12 in the same direction against the contact or snap spring 8.
  • the contact 7 lies between the contact 6 and the switching device 5 or the control device 1.
  • the contact carrier 9 and the working sensor 12 are fastened via the respective joint 10 or 15 to a common carrier 18 which is provided as an electrical connection for the contact 6 and the control heater 13 and also carries the control device 1.
  • the carrier 18 is essentially formed by an angular strip plate 19, which is fastened adjacent to an inner wall of the housing of the base body 3 only by plugging into openings in the bottom wall thereof and an electrical connecting element projecting beyond the outside of this bottom wall, e.g. forms a flat tongue.
  • the carrier 18 carries the device 1, which defines a plane approximately parallel to the articulated axes and / or planes mentioned and lies on the side of the switching device 5 remote from the switch 4 between its switching arm and the housing wall, which is approximately parallel to it.
  • the control device 1 has an ambient temperature sensor 20 lying approximately in the said plane.
  • the work sensor 12 and / or the sensor 20 is each by two interacting Links with different coefficients of thermal expansion, preferably formed by a strip-shaped and optionally one or more times bent bimetal. Both sensors are exposed in the same way to the ambient temperature acting on the device 2 or prevailing inside it. Their effect or deflection is opposite with increasing temperature on the one hand and decreasing temperature on the other hand, so that deflections of the switching cam 11 due to changes in the ambient temperature are compensated for by opposite deflections of an actuator 24 of the device 1.
  • the angular sensor 20 passes through an opening 23 in the angled area of the carrier 18 and is with its shorter leg 21 on the side of the carrier 18 facing away from the switch 4 or the switching device 5, e.g. attached by welding.
  • This adjusting member 25 is designed as a stud, which is accessible through an opening from the outside of the base body 3 at one end for adjustment, passes through a threaded hole in the leg 22 and is at the other end only by pressure system in engagement with a pressure surface 26 of the switching arm .
  • This pressure surface 26 is provided between the switching cam 11 and the joint 15 on the side of the working sensor 12 remote from the switch 4.
  • This support leg 27 can on the associated outer wall of the base body 3 rest supported or have a small gap distance therefrom, it being expediently arranged essentially rigidly in any case.
  • a frictional anti-rotation device 28 is provided, which can only be overcome by a predetermined torque acting on the adjusting member 25.
  • This anti-rotation device 28 is essentially formed by a leaf spring made of sheet metal, which is approximately flat and rests essentially flat on the sensor leg 22 on the side remote from the switching device 5.
  • the leaf spring is provided with a longitudinal passage slot for the adjusting member 25 and engages with the mutually facing longitudinal boundaries of this slot securely into the threads of the adjusting member 25.
  • the leaf spring between the adjusting member 25 and the attachment of the sensor 20 to the support 18 with attachments 29 is rigidly positioned on the sensor leg 22, e.g. fixed by spot welding.
  • the anti-rotation device 28 forms a spring arm which projects freely in approximately the same direction as the leg 22, but rests essentially flat against the leg 22.
  • the free end of this spring arm can protrude in its longitudinal direction over the free end of the leg 22 and be angled at the end, the fork arms of the anti-rotation device 28 projecting freely at this end instead of being connected to one another at a distance from one another.
  • the fastenings 29 are expediently in the region of the other end of the longitudinal slot or at a short distance therefrom.
  • a correction device 30 is provided, which is structurally included the control device 1 is summarized and forms with it a self-contained assembly module.
  • the correction device 30 held with the support 18 is located on the side of the switching device 5 or the sensor 20 or the leg 22 facing away from the switch 4, expediently essentially between the latter and the support leg 27.
  • a spring 31 e.g. a leaf spring, which lies essentially in a plane approximately parallel to at least one of the above-mentioned planes and can freely project in the manner of a spring tongue in the direction of the actuating member 24 or the adjusting member 25.
  • the spring 31, which is arranged essentially completely between the actuating member 24 and the strip plate 19 of the carrier 18, lies in a spacing gap 32 which is formed between the sensor leg 22 or the body of the anti-rotation device 28 and the carrier leg 27.
  • the spring 31, which is very weakly S-shaped in cross section at normal temperature and only deflected approximately by its sheet thickness, can protrude further in the longitudinal direction than the support leg 27.
  • the spring 31 is formed in one piece from the anti-rotation device 28, lies between the fork arms 33 in the longitudinal slot and has a smaller width than this.
  • the spring root of the spring 31 facing away from the free end passes in one piece adjacent to the fastenings 29 into the anti-rotation device 28, so that its end is fixed immovably relative to the sensor 20 by the fastenings 29.
  • the anti-rotation device can have approximately the same width as the sensor 20, so that it is approximately congruent with the leg 22. From the area of the fastening 29, the spring 31 rises in a flat curve to the support leg 27, on which it rests with its other curvature curve essentially continuously with a prestress.
  • the outer surface of the support leg 27 facing the sensor 20 forms a stop 34 designed as a sliding surface.
  • the support leg 27 can be tapered in width in view of its free end, for example be so trapezoidal that its trapezoidal base merges into the strip plate 19.
  • the sensor leg 22 projects freely with the actuating member 24 over the stop 34.
  • the sensor 20 is loaded against the direction of arrow 36, in which it deflects away from the pressure surface 26 when the ambient temperature increases.
  • the switching cam 11 deflects in the opposite direction in the direction of arrow 35 to the actuator 16.
  • the contact carrier 9 with the actuator 16 is also to be moved if the relative duty cycle is to be increased, since the switch cam 11 must then carry out a longer switching path under the effect of the control heater 13 until the contacts 6, 7 opened and the working and control circuit are interrupted.
  • the sensor 20 is deflected against the force of the spring 31 with bending deformation, the spring force also increasing with increasing deflection.
  • the distance of the stop 34 from the associated side of the anti-rotation device 28 or the spring 31 determines the maximum deflection, at the end of which the sensor 20 strikes the stop 34 with the interposition of the anti-rotation device 28 or the spring 31 and at least with the associated one the longitudinal section adjoining the beam 18 is rigidly fixed against further deflection.
  • the longitudinal section of the feeler leg 22 projecting freely beyond the stop 34 can be designed such that it can perform a slightly further deflection with the actuating element 24, which results in a corresponding correction characteristic of this deflection.
  • the specific deflection of the remaining section of the sensor 20 would in this case be significantly less than that of the entire sensor 20 before the limit stop.
  • connection contact 14 The spring forces exerted by the connection contact 14, the joints 10, 15, the snap spring 8, the switching or sensing arms and similar components of the switching device 2 can also have an effect on the respective characteristic curve, but not in the sense of the correction device 30 , since they either do not act directly on the characteristic of the control device 1 or do not allow precise dimensioning.
  • the correction spring 31 In the stop position of the ambient temperature sensor 20, the correction spring 31 is pressed flat substantially so that it lies between the fork arms 33 in the plane of the anti-rotation device 28. As a result, the correction device 30 can be made even more compact.

Landscapes

  • Control Of Resistance Heating (AREA)
  • Thermally Actuated Switches (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Control Of Temperature (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Basic Packing Technique (AREA)
  • Container Filling Or Packaging Operations (AREA)
  • Fixing For Electrophotography (AREA)
  • Selective Calling Equipment (AREA)
  • Air Bags (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Crushing And Grinding (AREA)

Abstract

A device (1) for compensation of the maladjustment of a power control apparatus (2) as a result of changes in the environmental temperature operates on at least one partial path against the flat spring (31) of a correction device (30), after which at least a part of the environmental temperature sensor (20) of the device (1) is fixed against further deflection by means of a stop (34) so that the actual values of the power setting always correspond to the set desired values, essentially independently of the environmental temperature. No special component is required for the correction spring (31) or for the stop (34) if a rotation protection device (28) or a support (18), which exists anyway, are used for this purpose. <IMAGE>

Description

Die Erfindung betrifft ein Schaltgerät mit einer Steuer-Einrichtung nach dem Oberbegriff des Patentanspruches 1. Die Einrichtung ist für Geräte geeignet, deren Arbeitscharakteristik durch ihre Umgebungstemperatur beeinflußt wird bzw. beeinflußt werden soll. Solche Schaltgeräte können z.B. Schalter, Regel-, Steuergeräte oder dgl. sein, die so verwendet werden, daß sie wechselnden Umgebungstemperaturen ausgesetzt sind.The invention relates to a switching device with a control device according to the preamble of claim 1. The device is suitable for devices whose working characteristics are influenced or are to be influenced by their ambient temperature. Such switching devices can e.g. Switches, regulators, control devices or the like. Which are used so that they are exposed to changing ambient temperatures.

Betriebs-Schaltgeräte von Elektrowärmegeräten, wie Elektroherden, liegen meist verhältnismäßig nahe bei der mit ihnen zu betreibenden Beheizung an der Rückseite einer Schalterblende und können dadurch von Raumtemperatur, also z.B. etwa 20° C, auf verhältnismäßig hohe Temperaturen von z.B. etwa 125° C aufgeheizt werden. Dadurch kann die Schaltcharakteristik ihrer Schalteinrichtung dejustieren, z.B. so beeinflußt werden, daß bestimmte, manuell einzustellende Schalter-Stellungen zu völlig anderen Heizleistungen als vorgesehen führen. In diesem Fall wird die Steuer-Einrichtung zweckmäßig zur Kompensation des Umgebungstemperatur-Einflusses verwendet. Zum Beispiel bei hohen Umgebungstemperaturen kann dann allerdings eine Überkompensation auftreten, die bewirkt, daß die volle Leistung bereits bei einer Geräteeinstellung erreicht wird, die unterhalb des Einstellwertes für diese Maximalleistung liegt.Operating switching devices of electrical heating devices, such as electric cookers, are usually relatively close to the heating to be operated with them on the back of a switch panel and can thus be heated from room temperature, e.g. around 20 ° C, to relatively high temperatures, e.g. around 125 ° C . As a result, the switching characteristics of their switching device can be misaligned, for example influenced in such a way that certain switch positions to be set manually lead to completely different heating outputs than intended. In this case, the control device is expediently used to compensate for the influence of the ambient temperature. Overcompensation can then occur, for example, at high ambient temperatures, which means that the full output is already achieved with a device setting that is below the setting value for this maximum output.

Diese Überkompensation kann dadurch vermieden werden, daß der Arbeitsweg des Temperaturfühlers der Kompensations-Einrichtung durch einen Anschlag einer Korrektureinrichtung fest begrenzt wird. Für manche Anwendungsfälle kann jedoch eine noch feinere Abstimmung der Schaltcharakteristik solcher Schaltgeräte zweckmäßig sein.This overcompensation can be avoided in that the working path of the temperature sensor of the compensation device is firmly limited by a stop of a correction device. For some applications, however, an even finer tuning of the switching characteristics of such switching devices can be useful.

Der EP-A-0 057 460 ist eine federnde Umgebungstemperatur-Kompensation zu entnehmen, wobei ein abgekröpfter, starrer Nocken des Umgebungstemperatur-Fühlers gegen einen federnden Anschlag auflaufen kann, der an einem Schnappschalter-Träger der Schalteinrichtung angeordnet ist. Diese Korrektur-Feder wird erst wirksam, wenn die vom Umgebungstemperatur-Fühler bewirkte Arbeitsbewegung zum größten Teil durchgeführt ist.A resilient ambient temperature compensation can be found in EP-A-0 057 460, wherein a cranked, rigid cam of the ambient temperature sensor can run up against a resilient stop which is arranged on a snap switch carrier of the switching device. This correction spring is only effective when the working movement caused by the ambient temperature sensor has largely been carried out.

Der Erfindung liegt des weiteren die Aufgabe zugrunde, ein Schaltgerät bzw. eine Einrichtung der genannten Art zu schaffen, mit welchen Nachteile bekannter Ausbildungen bzw. der beschriebenen Art vermieden werden können und die insbesondere über einen verhältnismäßig großen Arbeitsweg wenigstens eines zugehörigen Umgebungstemperatur-Fühlers eine sehr genaue Beeinflussung von dessen Steuerungscharakteristik ermöglicht.The invention is furthermore based on the object of creating a switching device or a device of the type mentioned, with which disadvantages of known designs or the type described can be avoided and which, in particular, over a relatively large working distance of at least one associated ambient temperature sensor allows precise control of its control characteristics.

Diese Aufgabe wird durch die Merkmale des Anspruches 1 gelöst. Durch die Merkmale nach den Ansprüchen 2 bis 10 ergeben sich weitere vorteilhafte Ausbildungen. Die Arbeitsbewegung mehrerer Fühler oder eines einzigen Umgebungstemperatur-Fühlers kann je nach den an die Schaltcharakteristik zu stellenden Anforderungen durch gleich- und/oder entgegengerichtete federnde Beaufschlagung bei Zunahme und/oder Abnahme der Umgebungstemperatur sowie jeweils nur über mindestens einen Teil und/oder kontinuierlich über den gesamten zugehörigen Arbeitsweg in sehr unterschiedlichen Weisen beeinflußt werden, und zwar unabhängig von solchen federnden Elementen, die ggf. durch eine Eigenfederung mindestens eines Temperaturfühlers, eine Kontaktfeder, eine Rückstellfeder oder ähnliches gebildet sind und somit nicht zur Korrektureinrichtung gehören. Der Arbeitsweg der Korrektur kann auch durch Anschlag vollständig starr beeendet werden und/oder durch Veränderung der wirksamen Fühlerlänge wenigstens auf Teilwegen unterschiedlich temperaturabhängig sein. Statt einer einzigen können auch mehrere Korrektureinrichtungen, Anschläge und Korrektur- bzw. Kompensations-Betätigungsglieder vorgesehen sein.This object is solved by the features of claim 1. The features according to claims 2 to 10 result in further advantageous configurations. The working movement of several sensors or a single ambient temperature sensor can be influenced in very different ways, depending on the requirements to be met by the switching characteristics, through the same and / or opposite spring action when the ambient temperature increases and / or decreases, and only over at least a part and / or continuously over the entire associated travel distance. specifically regardless of such resilient elements, which may be formed by a self-suspension of at least one temperature sensor, a contact spring, a return spring or the like and thus do not belong to the correction device. The work path of the correction can also be ended completely rigidly by a stop and / or at least by changing the effective probe length be different temperature dependent on partial routes. Instead of a single one, several correction devices, stops and correction or compensation actuators can also be provided.

Die erfindungsgemäße Ausbildung eignet sich jedoch insbesondere für Leistungssteuergeräte entsprechend der DE-OS 36 39 186, auf die wegen weiterer Einzelheiten und Wirkungen Bezug genommen wird. Derartige Schaltgeräte führen der Beheizung die Energie in periodischen Impulsen zu, wobei die relative Einschaltdauer in Prozent durch die Summe der Einschaltzeiten geteilt durch die Gesamtzeit bestimmt und manuell einstellbar ist. Eine periodisch mit den Impulsen ein- und ausgeschaltete Steuerbeheizung wirkt dabei auf einen Arbeitsfühler bzw. ein Arbeitsbimetall, der mindestens einen Arbeitskontakt, wie einen Schnappschalter, über eine Kontaktfeder entsprechend periodisch betätigt.However, the training according to the invention is particularly suitable for power control devices according to DE-OS 36 39 186, to which reference is made for further details and effects. Switching devices of this type supply the energy to the heating in periodic pulses, the relative operating time in percent being determined by the total of the operating times divided by the total time and being manually adjustable. A control heating that is switched on and off periodically with the pulses acts on a work sensor or a working bimetal which periodically actuates at least one work contact, such as a snap switch, via a contact spring.

Es hat sich jedoch gezeigt, daß sich bei einer nichtlinearen Kennlinie des Systems aus Arbeits- und Umgebungstemperatur-Fühler zwischen niederer und hoher relativer Einschaltdauer, insbesondere bei erhöhter Umgebungstemperatur, unterschiedliche Ausdehnungen der beiden Fühler und daher unterschiedliche Steuer- bzw. Kompensationswirkungen ergeben. Im Bereich niedriger relativer Einschaltdauer arbeitet der Arbeitsfühler auch bei erhöhter Umgebungstemperatur meist noch verhältnismäßig linear, während er im oberen Bereich, z.B. bei 40 % relativer Einschaltdauer, nichtlinear arbeitet. Der Umgebungstemperatur-Fühler dagegen arbeitet meist noch linear, wenn der Arbeitsfühler bereits den nichtlinearen Bereich erreicht hat, so daß sich gegenüber dem Soll- bzw. Einstellwert eine zu hohe relative Einschaltdauer ergibt. Dies konnte zwar durch unterkompensierte Justierung im Bereich niedriger relativer Einschaltdauer verhältnismäßig gut ausgeglichen werden, jedoch besteht das Bedürfnis nach noch genauerer Steuerung bzw. Kompensation.It has been shown, however, that with a non-linear characteristic of the system consisting of working and ambient temperature sensors between low and high relative duty cycles, in particular at elevated ambient temperatures, there are different expansions of the two sensors and therefore different control and compensation effects. In the area of low relative duty cycle, the work sensor usually still works relatively linearly even at elevated ambient temperatures, while in the upper range, for example at 40% relative duty cycle, it works non-linearly. The ambient temperature sensor, on the other hand, usually still works linearly when the work sensor has already reached the non-linear range, so that the duty cycle is too high compared to the setpoint or setpoint. This could be compensated for relatively well by undercompensated adjustment in the area of low relative duty cycles, but there is a need for even more precise control or compensation.

Im Falle eines solchen Leistungssteuergerätes ist daher die Korrektureinrichtung zweckmäßig so ausgebildet, daS sie mit einer von den übrigen genannten Federn der Schalteinrichtung gesonderten Feder derjenigen Arbeitsbewegung des Umgebungstemperatur-Fühlers entgegenwirkt, die sich bei einer Zunahme der Umgebungstemperatur ergibt. Vorteilhaft steigt die Federkraft mit zunehmendem Arbeitsweg im wesentlichen stetig an. Diese Arbeitsbewegung des Umgebungs-Temperaturfühlers ist zweckmäßig der entsprechenden Bewegung des Arbeitsfühlers entgegengesetzt, um auf einfache Weise die gewünschte Kompensationswirkung zu erzielen. Dadurch wird erreicht, daß im Bereich niedriger relativer Einschaltdauer, nämlich wenn auch bei hoher Umgebungstemperatur eine verhältnismäßig lineare Kennlinie gegeben ist, der Umgebungstemperatur-Fühler gegen keine oder nur eine sehr geringe Gegenkraft arbeitet und daS diese Gegenkraft bei zunehmender relativer Einschaltdauer und/oder weiter steigender Umgebungstemperatur zunehmend größer wird, so daß die genannte Überkompensation in diesem Bereich wesentlich reduziert bzw. vollständig verhindert werden kann.In the case of such a power control device, the correction device is therefore expediently designed such that it counteracts, with a spring separate from the other springs mentioned in the switching device, that working movement of the ambient temperature sensor which results when the ambient temperature increases. The spring force advantageously increases substantially steadily with increasing commute. This working movement of the ambient temperature sensor is expediently opposite to the corresponding movement of the working sensor in order to achieve the desired compensation effect in a simple manner. This ensures that in the area of low relative duty cycle, namely when there is a relatively linear characteristic even at high ambient temperatures, the ambient temperature sensor works against no or only a very small counterforce and that this counterforce increases with increasing duty cycle and / or further increase Ambient temperature is increasing, so that the above-mentioned overcompensation can be significantly reduced or completely prevented in this area.

Zweckmäßig ist der Umgebungstemperatur-Fühler nicht über alle vorkommenden Umgebungstemperaturen frei bzw. gegen Federkraft bewegbar, sondern oberhalb einer vorbestimmten Umgebungstemperatur und/oder oberhalb einer bestimmten relativen Einschaltdauer anschlagbegrenzt, so daS dann eine weitere Auslenkung wenigstens verringert und eine Verschiebung der relativen Einschaltdauer nach oben durch formschlüssige Festlegung wenigstens eines Teiles des Fühlers unterbunden wird. Die erfindungsgemäße Ausbildung ermöglicht es, bei relativ starken Unterschieden der Umgebungstemperatur zwischen z.B. etwa 25°C und 125°C dieselben Kennlinien für die relative Einschaltdauer bezogen auf im wesentlichen jede manuelle Geräteeinstellung zu erreichen. Dadurch wird der Gebrauchswert sehr einfach und kostengünstig herzustellender, elektromechanischer Leistungssteuergeräte wesentlich gesteigert.The ambient temperature sensor is expediently not free to move over all occurring ambient temperatures or against spring force, but rather is stop-limited above a predetermined ambient temperature and / or above a certain relative duty cycle, so that at least a further deflection is then reduced and the relative duty cycle is shifted upwards positive locking of at least part of the sensor is prevented. The design according to the invention makes it possible to achieve the same characteristic curves for the relative duty cycle in relation to essentially every manual device setting in the event of relatively large differences in the ambient temperature between, for example, about 25 ° C. and 125 ° C. This makes the use value very simple and inexpensive to manufacture, electromechanical power control devices significantly increased.

Eine wesentliche bauliche Vereinfachung ergibt sich, wenn die Korrektureinrichtung nicht durch mehrere Federn, sondern nur durch eine einzige Feder, z.B. eine Flachfeder, und ggf. einen Anschlag gebildet ist. Ist die Feder unmittelbar zwischen einer Außenfläche des Umgebungstemperatur-Fühlers und einem Federwiderlager angeordnet, so kann letzteres gleichzeitig den Anschlag für die Wegbegrenzung des Fühlers bilden. Anstatt die Steuer-Einrichtung und/oder die Korrektureinrichtung an einem mit einer Leistungs-Einstellwelle oder dgl. beweg- bzw. schwenkbaren Schaltarm und/oder Schnappkontakt-Träger vorzusehen, ist sie zweckmäßig mit einem Träger unmittelbar an einem Gerätesockel im wesentlichen starr befestigt, z.B. durch Einstecken des Trägers in entsprechende Halterungsöffnungen eines Sockelgehäuses. Der Träger kann in einfacher Weise gleichzeitig das Widerlager bzw. den Anschlag bilden und mit den beiden Einrichtungen in einer einspringenden Gehäuseecke des Sockels des Gerätes raumsparend liegen.An essential structural simplification results if the correction device is not made up of several springs, but only by a single spring, e.g. a flat spring, and possibly a stop is formed. If the spring is arranged directly between an outer surface of the ambient temperature sensor and a spring abutment, the latter can simultaneously form the stop for the travel limitation of the sensor. Instead of providing the control device and / or the correction device on a switching arm and / or snap contact carrier which can be moved or pivoted with a power setting shaft or the like, it is expediently attached to a device base essentially rigidly with a carrier, e.g. by inserting the carrier into corresponding holder openings in a base housing. The carrier can in a simple manner simultaneously form the abutment or the stop and, with the two devices, lie in a space-saving manner in a recessed housing corner of the base of the device.

Eine weitere wesentliche Vereinfachung ergibt sich, wenn die Feder im wesentlichen einteilig durch einen ohnehin vorhandenen Bauteil des Gerätes gebildet ist, so daß kein zusätzlicher Bauteil erforderlich ist. Z.B. kann die Feder aus einem Sicherungsglied für ein Justierglied zungenartig herausgestanzt sein.A further significant simplification results if the spring is essentially formed in one piece by an existing component of the device, so that no additional component is required. E.g. the spring can be punched out tongue-like out of a securing member for an adjusting member.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher erläutert. In den Zeichnungen zeigen:

Fig. 1
eine erfindungsgemäße Steuer-Einrichtung an einem ausschnittsweise dargestellten Leistungssteuergerät in Ansicht,
Fig. 2
einen Ausschnitt der Fig. 1 in vergrößerter und geschnittener Darstellung und
Fig. 3
die Steuer-Einrichtung gemäß Fig. 2 in Draufsicht.
An embodiment of the invention is shown in the drawings and is explained in more detail below. The drawings show:
Fig. 1
a view of a control device according to the invention on a power control unit shown in sections,
Fig. 2
a section of FIG. 1 in an enlarged and sectional view and
Fig. 3
2 in top view.

Die erfindungsgemäße Einrichtung 1 ist an einem Leistungssteuer-Gerät 2 angeordnet, das in einem gehäuseförmigen Grundkörper 3 einen von einer Schalteinrichtung 5 betätigten Leistungs-Schalter 4 für eine elektrische Beheizung einer Elektrokochplatte oder dgl. aufweist. Der Schalter 4 hat einen durch taktende Bewegung mit einem festen Kontakt 7 zusammenarbeitenden bewegbaren Kontakt 6, der über eine Schnappfeder 8 an einem Kontaktträger 9 angeordnet ist und dessen relative Einschaltdauer durch Schwenken des Kontaktträgers 9 um ein Gelenk 10 verändert werden kann. An einem vom Kontakt 6 entfernten Ende der Schnappfeder 8 greift zu diesem Zweck ein Schaltnocken 11 eines Arbeitsfühlers 12 an, der durch taktende Beheizung mit einer Steuerbeheizung 13 in entgegengesetzten Richtungen ausgelenkt wird. Die am Arbeitsfühler 12 befestigte Steuerbeheizung 13 ist an ihrem dem Schaltnocken 11 zugehörigen Ende über einen schleifend sowie federnd anliegenden Anschlußkontakt 14 und am anderen Ende über ein Gelenk 15 an einen Stromkreis angeschlossen, das den Arbeitsfühler 12 um eine zum Gelenk 10 etwa parallele Achse schwenkbar trägt.The device 1 according to the invention is arranged on a power control device 2 which, in a housing-shaped base body 3, has a power switch 4 actuated by a switching device 5 for electrically heating an electric hotplate or the like. The switch 4 has a movable contact 6, which interacts by a clocking movement with a fixed contact 7, which is arranged on a contact carrier 9 via a snap spring 8 and whose relative operating time can be changed by pivoting the contact carrier 9 about a joint 10. For this purpose, a switching cam 11 of a work sensor 12 engages on an end of the snap spring 8 remote from the contact 6, which cam is deflected in opposite directions by clocked heating with a control heater 13. The control heater 13 attached to the work sensor 12 is connected at its end associated with the switching cam 11 via a sliding and resilient connection contact 14 and at the other end via a joint 15 to a circuit which carries the work sensor 12 pivotably about an axis approximately parallel to the joint 10 .

Der Schalter 4 und die Schalteinrichtung 5 bzw. die Schnappfeder 8, der Kontaktträger 9, der Arbeitsfühler 12 und/oder die Steuerbeheizung 13 definieren jeweils eine zum zugehörigen Gelenk 10 bzw. 15 und/oder zueinander etwa parallele Ebene. Auf der von der thermomechanischen Schalteinrichtung 5 abgekehrten Seite greift am Kontaktträger 9 als Stellglied 16 einer Stelleinrichtung eine Umfangs-Nokkenkurve an, die auf einer manuell betätigbaren Stellwelle 17 angeordnet ist und mit welcher der Kontakt 6 außer in eine geöffnete Ausschaltstellung stufenlos in unterschiedliche Leistungsstufen eingestellt werden kann. Die Gelenke 10, 15 sind durch Federgelenke gebildet, welche den Träger 9 mit einem Laufnocken gegen das Stellglied 16 und den einteilig mit dem Arbeitsfühler 12 ausgebildeten Schaltnocken 11 in gleicher Richtung gegen die Kontakt- bzw. Schnappfeder 8 andrücken. Der Kontakt 7 liegt zwischen dem Kontakt 6 und der Schalteinrichtung 5 bzw. der Steuer-Einrichtung 1.The switch 4 and the switching device 5 or the snap spring 8, the contact carrier 9, the working sensor 12 and / or the control heater 13 each define a plane approximately parallel to the associated joint 10 or 15 and / or to one another. On the side facing away from the thermomechanical switching device 5, a circumferential cam cam acts on the contact carrier 9 as an actuator 16 of an actuating device, which cam cam is arranged on a manually operable actuating shaft 17 and with which the contact 6 can be continuously adjusted to different power levels apart from an open switch-off position can. The joints 10, 15 are formed by spring joints which press the carrier 9 with a running cam against the actuator 16 and the switching cam 11 formed in one piece with the working sensor 12 in the same direction against the contact or snap spring 8. The contact 7 lies between the contact 6 and the switching device 5 or the control device 1.

Der Kontaktträger 9 und der Arbeitsfühler 12 sind über das jeweilige Gelenk 10 bzw. 15 an einem gemeinsamen Träger 18 befestigt, der als elektrischer Anschluß für den Kontakt 6 und die Steuerbeheizung 13 vorgesehen ist und auch die Steuer-Einrichtung 1 trägt. Der Träger 18 ist im wesentlichen durch eine winkelförmige Streifenplatte 19 gebildet, die benachbart zu einer Gehäuseinnenwand des Grundkörpers 3 lediglich durch Einstecken in Öffnungen von dessen Bodenwand befestigt ist und ein über die Außenseite dieser Bodenwand vorstehendes elektrisches Anschlußglied, z.B. eine Flachsteckzunge bildet. Im Bereich seines abgewinkelten Endes trägt der Träger 18 die Einrichtung 1, die eine zu den genannten Gelenkachsen und/oder Ebenen etwa parallele Ebene definiert und auf der vom Schalter 4 abgekehrten Seite der Schalteinrichtung 5 zwischen deren Schaltarm und der dazu etwa parallelen Gehäusewand liegt.The contact carrier 9 and the working sensor 12 are fastened via the respective joint 10 or 15 to a common carrier 18 which is provided as an electrical connection for the contact 6 and the control heater 13 and also carries the control device 1. The carrier 18 is essentially formed by an angular strip plate 19, which is fastened adjacent to an inner wall of the housing of the base body 3 only by plugging into openings in the bottom wall thereof and an electrical connecting element projecting beyond the outside of this bottom wall, e.g. forms a flat tongue. In the area of its angled end, the carrier 18 carries the device 1, which defines a plane approximately parallel to the articulated axes and / or planes mentioned and lies on the side of the switching device 5 remote from the switch 4 between its switching arm and the housing wall, which is approximately parallel to it.

Die Steuer-Einrichtung 1 weist einen etwa in der genannten Ebene liegenden Umgebungstemperatur-Fühler 20 auf. Der Arbeitsfühler 12 und/oder der Fühler 20 ist jeweils durch zwei zusammenwirkende Glieder mit unterschiedlichem thermischem Ausdehnungskoeffizienten, vorzugsweise durch ein streifenförmiges und ggf. ein- oder mehrfach gebogenes Thermobimetall gebildet. Beide Fühler sind in gleicher Weise der auf das Gerät 2 wirkenden bzw. in dessen Innerem herrschenden Umgebungstemperatur ausgesetzt. Ihre Wirkung bzw. Auslenkung ist bei zunehmender Temperatur einerseits und abnehmender Temperatur andererseits jedoch entgegengerichtet, so daß Auslenkungen des Schaltnockens 11 aufgrund von Änderungen der Umgebungstemperatur durch entgegengesetzte Auslenkungen eines Betätigungsgliedes 24 der Einrichtung 1 kompensiert werden.The control device 1 has an ambient temperature sensor 20 lying approximately in the said plane. The work sensor 12 and / or the sensor 20 is each by two interacting Links with different coefficients of thermal expansion, preferably formed by a strip-shaped and optionally one or more times bent bimetal. Both sensors are exposed in the same way to the ambient temperature acting on the device 2 or prevailing inside it. Their effect or deflection is opposite with increasing temperature on the one hand and decreasing temperature on the other hand, so that deflections of the switching cam 11 due to changes in the ambient temperature are compensated for by opposite deflections of an actuator 24 of the device 1.

Der winkelförmige Fühler 20 durchsetzt mit seinem abgewinkelten Bereich eine Öffnung 23 im abgewinkelten Bereich des Trägers 18 und ist mit seinem kürzeren Schenkel 21 an der vom Schalter 4 bzw. der Schalteinrichtung 5 abgekehrten Seite des Trägers 18 z.B. durch Schweißen befestigt. Der längere, etwa in gleicher Richtung wie der Kontaktträger 9 bzw. der Arbeitsfühler 12 frei ausragende Schenkel 22 des Fühlers 20 trägt in Nähe seines Endes das Betätigungsglied 24, das durch das ballige Ende eines gegenüber dem Fühler 20 etwa in Betätigungsrichtung verstellbaren Justiergliedes 25 gebildet ist. Dieses Justierglied 25 ist als Stiftschraube ausgebildet, die durch eine Öffnung von der Außenseite des Grundkörpers 3 her an einem Ende zur Verstellung zugänglich ist, eine Gewindebohrung im Schenkel 22 durchsetzt und mit dem anderen Ende lediglich durch Druckanlage in Eingriff mit einer Druckfläche 26 des Schaltarmes liegt. Diese Druckfläche 26 ist zwischen dem Schaltnocken 11 und dem Gelenk 15 an der vom Schalter 4 abgekehrten Seite des Arbeitsfühlers 12 vorgesehen.With its angled area, the angular sensor 20 passes through an opening 23 in the angled area of the carrier 18 and is with its shorter leg 21 on the side of the carrier 18 facing away from the switch 4 or the switching device 5, e.g. attached by welding. The longer leg 22 of the sensor 20, which projects freely in the same direction as the contact carrier 9 or the working sensor 12, carries near its end the actuating member 24, which is formed by the spherical end of an adjusting member 25 which is adjustable relative to the sensor 20 approximately in the actuating direction . This adjusting member 25 is designed as a stud, which is accessible through an opening from the outside of the base body 3 at one end for adjustment, passes through a threaded hole in the leg 22 and is at the other end only by pressure system in engagement with a pressure surface 26 of the switching arm . This pressure surface 26 is provided between the switching cam 11 and the joint 15 on the side of the working sensor 12 remote from the switch 4.

Auf der von der Schalteinrichtung 5 abgekehrten Seite des Fühlers 20 bzw. des Schenkels 22 liegt der kürzere Trägerschenkel 27 des Trägers 18, der etwa in gleicher Richtung wie der Schenkel 22 frei ausragt, jedoch in geringem Abstand vor dem Justierglied 25 endet. Dieser Trägerschenkel 27 kann an der zugehörigen Außenwand des Grundkörpers 3 abgestützt anliegen oder einen geringen Spaltabstand davon haben, wobei er in jedem Fall zweckmäßig im wesentlichen lagestarr angeordnet ist. Für das Justierglied 25 ist eine kraftschlüssig durch Reibung wirkende Verdrehsicherung 28 vorgesehen, die nur durch eine vorbestimmte, auf das Justierglied 25 wirkende Drehkraft überwunden werden kann. Diese Verdrehsicherung 28 ist im wesentlichen durch eine Blattfeder aus Blech gebildet, welche annähernd eben ist und auf der von der Schalteinrichtung 5 abgekehren Seite im wesentlichen flächig an dem Fühler-Schenkel 22 anliegt. Die Blattfeder ist mit einem Durchtritts-Längsschlitz für das Justierglied 25 versehen und greift mit den einander zugekehrten Längsbegrenzungen dieses Schlitzes sichernd in die Gewindegänge des Justiergliedes 25 ein.On the side of the sensor 20 or the leg 22 facing away from the switching device 5 is the shorter support leg 27 of the support 18, which projects freely in approximately the same direction as the leg 22, but ends at a short distance in front of the adjusting member 25. This support leg 27 can on the associated outer wall of the base body 3 rest supported or have a small gap distance therefrom, it being expediently arranged essentially rigidly in any case. For the adjusting member 25, a frictional anti-rotation device 28 is provided, which can only be overcome by a predetermined torque acting on the adjusting member 25. This anti-rotation device 28 is essentially formed by a leaf spring made of sheet metal, which is approximately flat and rests essentially flat on the sensor leg 22 on the side remote from the switching device 5. The leaf spring is provided with a longitudinal passage slot for the adjusting member 25 and engages with the mutually facing longitudinal boundaries of this slot securely into the threads of the adjusting member 25.

Im Abstand vom Justierglied 25 ist die Blattfeder zwischen dem Justierglied 25 und der Befestigung des Fühlers 20 am Träger 18 mit Befestigungen 29 lagestarr am Fühler-Schenkel 22, z.B. durch Punktschweißung, befestigt. Dadurch bildet die Verdrehsicherung 28 einen etwa in gleicher Richtung wie der Schenkel 22 frei ausragenden, jedoch im wesentlichen flächig am Schenkel 22 anliegenden Federarm. Das freie Ende dieses Federarmes kann in seiner Längsrichtung über das freie Ende des Schenkels 22 vorstehen und am Ende abgewinkelt sein, wobei die Gabelarme der Verdrehsicherung 28 an diesem Ende anstatt miteinander verbunden zu sein im Abstand zueinanderliegend frei ausragen. Die Befestigungen 29 liegen zweckmäßig im Bereich des anderen Endes des Längsschlitzes bzw. in geringem Abstand davon.At a distance from the adjusting member 25, the leaf spring between the adjusting member 25 and the attachment of the sensor 20 to the support 18 with attachments 29 is rigidly positioned on the sensor leg 22, e.g. fixed by spot welding. As a result, the anti-rotation device 28 forms a spring arm which projects freely in approximately the same direction as the leg 22, but rests essentially flat against the leg 22. The free end of this spring arm can protrude in its longitudinal direction over the free end of the leg 22 and be angled at the end, the fork arms of the anti-rotation device 28 projecting freely at this end instead of being connected to one another at a distance from one another. The fastenings 29 are expediently in the region of the other end of the longitudinal slot or at a short distance therefrom.

Die temperaturabhängigen Auslenkungen des Arbeitsfühlers 12 sowie des Fühlers 20 sind ebenso wie die gemeinsame Auslenkung des durch diese Fühler gebildeten Fühlersystems nicht durch lineare Kennlinien bestimmt. Um insbesondere die gemeinsame Kennlinie in Richtung zu einer möglichst linearen Nivellierung zu beeinflussen, ist eine Korrektureinrichtung 30 vorgesehen, die baulich mit der Steuer-Einrichtung 1 zusammengefaßt ist und mit dieser eine in sich geschlossene Montagebaugruppe bildet. Die mit dem Träger 18 gehalterte Korrektureinrichtung 30 liegt auf der vom Schalter 4 abgekehrten Seite der Schalteinrichtung 5 bzw. des Fühlers 20 oder des Schenkels 22, und zwar zweckmäßig im wesentlichen zwischen diesem und dem Trägerschenkel 27.The temperature-dependent deflections of the working sensor 12 and of the sensor 20, like the joint deflection of the sensor system formed by these sensors, are not determined by linear characteristic curves. In order to influence, in particular, the common characteristic in the direction of a leveling that is as linear as possible, a correction device 30 is provided, which is structurally included the control device 1 is summarized and forms with it a self-contained assembly module. The correction device 30 held with the support 18 is located on the side of the switching device 5 or the sensor 20 or the leg 22 facing away from the switch 4, expediently essentially between the latter and the support leg 27.

Sie weist als Korrekturglied eine Feder 31, z.B. eine Blattfeder, auf, die im wesentlichen in einer zu mindestens einer der genannten Ebenen etwa parallelen Ebene liegt und nach Art einer Federzunge frei in Richtung zum Betätigungsglied 24 bzw. zum Justierglied 25 ausragen kann. Die im wesentlichen vollständig zwischen dem Betätigungsglied 24 und der Streifenplatte 19 des Trägers 18 angeordnete Feder 31 liegt in einem Abstands-Spalt 32, der zwischen dem Fühler-Schenkel 22 bzw. dem Körper der Verdrehsicherung 28 und dem Trägerschenkel 27 gebildet ist. Die bei Normaltemperatur im Querschnitt sehr schwach S-förmig gekrümmte und nur etwa um ihre Blechdicke ausgelenkte Feder 31 kann dabei in Längsrichtung weiter vorstehen als der Trägerschenkel 27.It has a spring 31, e.g. a leaf spring, which lies essentially in a plane approximately parallel to at least one of the above-mentioned planes and can freely project in the manner of a spring tongue in the direction of the actuating member 24 or the adjusting member 25. The spring 31, which is arranged essentially completely between the actuating member 24 and the strip plate 19 of the carrier 18, lies in a spacing gap 32 which is formed between the sensor leg 22 or the body of the anti-rotation device 28 and the carrier leg 27. The spring 31, which is very weakly S-shaped in cross section at normal temperature and only deflected approximately by its sheet thickness, can protrude further in the longitudinal direction than the support leg 27.

Die Feder 31 ist einteilig aus der Verdrehsicherung 28 herausgeformt, liegt zwischen deren Gabelarmen 33 im Längsschlitz und hat gegenüber diesem eine geringere Breite. Die vom freien Ende abgekehrte Federwurzel der Feder 31 geht benachbart zu den Befestigungen 29 einteilig in die Verdrehsicherung 28 über, so daß ihr Ende durch die Befestigungen 29 im wesentlichen unbeweglich gegenüber dem Fühler 20 festgelegt ist. Die Verdrehsicherung kann etwa gleiche Breite wie der Fühler 20 haben, so daß sie annähernd deckungsgleich zum Schenkel 22 liegt. Von dem Bereich der Befestigung 29 steigt die Feder 31 flach gekrümmt zum Trägerschenkel 27 an, an welchem sie mit ihrem anderen Krümmungsbogen im wesentlichen ständig mit Vorspannung anliegt. Für diese Anlage bildet die dem Fühler 20 zugekehrte Außenfläche des Trägerschenkels 27 einen als Gleitfläche ausgebildeten Anschlag 34. Der Trägerschenkel 27 kann in Ansicht zu seinem freien Ende in der Breite verjüngt, z.B. so trapezförmig ausgebildet sein, daß er mit seiner Trapezbasis in die Streifenplatte 19 übergeht.The spring 31 is formed in one piece from the anti-rotation device 28, lies between the fork arms 33 in the longitudinal slot and has a smaller width than this. The spring root of the spring 31 facing away from the free end passes in one piece adjacent to the fastenings 29 into the anti-rotation device 28, so that its end is fixed immovably relative to the sensor 20 by the fastenings 29. The anti-rotation device can have approximately the same width as the sensor 20, so that it is approximately congruent with the leg 22. From the area of the fastening 29, the spring 31 rises in a flat curve to the support leg 27, on which it rests with its other curvature curve essentially continuously with a prestress. For this system, the outer surface of the support leg 27 facing the sensor 20 forms a stop 34 designed as a sliding surface. The support leg 27 can be tapered in width in view of its free end, for example be so trapezoidal that its trapezoidal base merges into the strip plate 19.

Der Fühler-Schenkel 22 steht mit dem Betätigungsglied 24 frei über den Anschlag 34 vor.The sensor leg 22 projects freely with the actuating member 24 over the stop 34.

Durch die Feder 31 ist der Fühler 20 entgegen der Richtung Pfeil 36 belastet, in welcher er bei Zunahme der Umgebungstemperatur weggerichtet von der Druckfläche 26 auslenkt. Bei Zunahme der Umgebungstemperatur lenkt der Schaltnocken 11 entgegengesetzt in Richtung Pfeil 35 zum Stellglied 16 aus. In im wesentlichen gleicher Richtung Pfeil 37 ist auch der Kontaktträger 9 mit dem Stellglied 16 zu bewegen, wenn die relative Einschaltdauer erhöht werden soll, da dann der Schaltnocken 11 unter der Wirkung der Steuerbeheizung 13 einen größeren Schaltweg ausführen muß, bis die Kontakte 6, 7 geöffnet und der Arbeits- sowie der Steuer-Stromkreis unterbrochen werden.By the spring 31, the sensor 20 is loaded against the direction of arrow 36, in which it deflects away from the pressure surface 26 when the ambient temperature increases. When the ambient temperature increases, the switching cam 11 deflects in the opposite direction in the direction of arrow 35 to the actuator 16. In essentially the same direction as arrow 37, the contact carrier 9 with the actuator 16 is also to be moved if the relative duty cycle is to be increased, since the switch cam 11 must then carry out a longer switching path under the effect of the control heater 13 until the contacts 6, 7 opened and the working and control circuit are interrupted.

Nimmt die Umgebungstemperatur zu, so wird der Fühler 20 gegen die Kraft der Feder 31 unter Biegeverformung ausgelenkt, wobei die Federkraft mit zunehmender Auslenkung ebenfalls zunimmt. Der Abstand des Anschlages 34 von der zugehörigen Seite der Verdrehsicherung 28 bzw. der Feder 31 bestimmt die maximale Auslenkung, an deren Ende der Fühler 20 unter Zwischenlage der Verdrehsicherung 28 bzw. der Feder 31 an dem Anschlag 34 anschlägt und zumindest mit dem zugehörigen, an den Träger 18 anschließenden Längsabschnitt gegen weitere Auslenkung starr festgelegt wird. Ggf. kann der über den Anschlag 34 frei vorstehende Längsabschnitt des Fühler-Schenkels 22 so ausgebildet sein, daß er mit dem Betätigungsglied 24 noch eine geringfügig weitere Auslenkung ausführen kann, wodurch sich eine entsprechende Korrektur-Kennlinie dieser Auslenkung ergibt. Die spezifische Auslenkung des Restabschnittes des Fühlers 20 wäre in diesem Fall wesentlich geringer als die des gesamten Fühlers 20 vor der Anschlagbegrenzung.If the ambient temperature increases, the sensor 20 is deflected against the force of the spring 31 with bending deformation, the spring force also increasing with increasing deflection. The distance of the stop 34 from the associated side of the anti-rotation device 28 or the spring 31 determines the maximum deflection, at the end of which the sensor 20 strikes the stop 34 with the interposition of the anti-rotation device 28 or the spring 31 and at least with the associated one the longitudinal section adjoining the beam 18 is rigidly fixed against further deflection. Possibly. The longitudinal section of the feeler leg 22 projecting freely beyond the stop 34 can be designed such that it can perform a slightly further deflection with the actuating element 24, which results in a corresponding correction characteristic of this deflection. The specific deflection of the remaining section of the sensor 20 would in this case be significantly less than that of the entire sensor 20 before the limit stop.

Die durch den Anschlußkontakt 14, die Gelenke 10, 15, die Schnappfeder 8, die Schalt- bzw. Fühlarme und ähnliche Bestandteile des Schalt-Gerätes 2 ausgeübten Federkräfte können zwar ebenfalls eine Wirkung auf die jeweilige Kennlinie haben, nicht jedoch im Sinne der Korrektureinrichtung 30, da sie entweder nicht unmittelbar auf die Kennlinie der Steuer-Einrichtung 1 wirken oder keine genaue Bemessung ermöglichen. In Anschlagstellung des Umgebungstemperatur-Fühlers 20 ist die Korrektur-Feder 31 im wesentlichen eben flach gedrückt, so daß sie zwischen den Gabelarmen 33 in der Ebene der Verdrehsicherung 28 liegt. Dadurch kann die Korrektureinrichtung 30 noch kompakter ausgebildet werden.The spring forces exerted by the connection contact 14, the joints 10, 15, the snap spring 8, the switching or sensing arms and similar components of the switching device 2 can also have an effect on the respective characteristic curve, but not in the sense of the correction device 30 , since they either do not act directly on the characteristic of the control device 1 or do not allow precise dimensioning. In the stop position of the ambient temperature sensor 20, the correction spring 31 is pressed flat substantially so that it lies between the fork arms 33 in the plane of the anti-rotation device 28. As a result, the correction device 30 can be made even more compact.

Claims (10)

  1. Switching mechanism with an apparatus (1) for controlling an ambient temperature influence on the switching mechanism (2), such as a switch, a regulating or control device, etc., which has at least one switching device (5), with means for the correcting influencing of the switching characteristics of the switching device (5) as a function of the ambient temperature, and with means acting resiliently on at least part of this influencing action, at least one ambient temperature sensor (20) determining the working movements and paths and influencing the switching characteristics of the particular switching device (5), as well as correcting means (30) and at least one correcting device influencing at least part of these working movements with at least one spring tension-determining correcting spring (31) are provided, which resiliently counteracts a working movement of the ambient temperature sensor (20) and is supported on a substantially fixed abutment (27), characterized in that for the fixing of the correcting spring (31) it is directly supported on the ambient temperature sensor (20) and is constructed as a flat spring.
  2. Switching mechanism according to claim 1, characterized in that the correcting means (30) act resiliently on the working movement at least partly with the spring tension separate from the sensor (20), that in particular the correcting means (30) resiliently counteract a working movement of the ambient temperature sensor (20) corresponding to an increase in the ambient temperature and/or the spring tension of the correcting means (30) changes with the working path of the ambient temperature sensor (20) and preferably increases with a rising ambient temperature.
  3. Switching mechanism according to claim 1 or 2, characterized in that the effective resilient working path of at least part of the correcting means (30) is limited and in particular above a predetermined ambient temperature of the working path of at least part of the ambient temperature sensor (20) is stop-limited.
  4. Switching mechanism according to one of the preceding claims, characterized in that at least one correcting spring (31) is provided in the form of a leaf spring, that in particular only a single correcting spring (31) is provided and/or that at least one portion of at least one correcting spring (31) is fixed in substantially clearance-free manner with respect to the ambient temperature sensor (20), being in particular fixed by welding or the like.
  5. Switching mechanism according to one of the preceding claims, characterized in that the abutment (27) is substantially fixed with respect to a carrier (18) for at least one sensor and/or a body (3) of the switching mechanism (2), that in particular at least one correcting spring (31) rests flat in a gap (32) between the abutment and the ambient temperature sensor (20) and that preferably the abutment forms a stop (34) for at least part of the sensor (20).
  6. Switching mechanism according to one of the preceding claims, characterized in that the ambient temperature sensor (20) is formed by a bimetal, which in particular has an angular construction, is fixed with a leg (21) to the carrier (18) and is arranged with a further leg (22) in a substantially freely projecting manner, the correcting device (30) preferably engaging with the freely projecting leg (22) acting in correcting manner on the switching device (5) with an actuator (24).
  7. Switching mechanism according to claim 5 or 6, characterized in that the carrier (18) has an angular construction and is in particular formed by an angular strip plate (19) inserted in the body (3) and which preferably forms with one leg (27) the abutment or is traversed in an opening (23) by the ambient temperature sensor (20) and/or that at least one correcting spring (31) is only supported by a stop on the abutment (27) and preferably between said support and the support on the ambient temperature sensor (20) has a shallow S-shaped curvature.
  8. Switching mechanism according to one of the claims 4 to 7, characterized in that at least one correcting spring (31) forms a further functional part of the apparatus (1) and in particular a securing member for the actuator (24) formed by an adjustable setting member (25) and preferably a flat fork projects over the correcting spring (31), whose fork arms (33) engage in a threaded portion of the setting member (25) and/or at least one correcting spring (31) forms a tongue-like component punched and bent out of the sheet metal part and which together with the latter is fixed to the ambient temperature sensor (20).
  9. Switching mechanism according to one of the claims 4 to 8, characterized in that at least one correcting spring (31) is substantially located on the side of the ambient temperature sensor (20) remote from the switching device (5) and which is preferably supported with the actuator (24) directly on a switching arm of the switching device (5) at least partly formed by a periodically heatable working bimetal.
  10. Switching mechanism according to one of the preceding claims, characterized in that the apparatus (1) is constructed or set for compensating the ambient temperature influence and/or the correcting device (30) is constructed or set for correcting an overcompensation.
EP91117265A 1990-10-17 1991-10-10 Switching mechanism with an apparatus for controlling the influence of ambient characteristics Expired - Lifetime EP0481355B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4032942A DE4032942A1 (en) 1990-10-17 1990-10-17 DEVICE FOR CONTROLLING AN ENVIRONMENTAL INFLUENCE ON DEVICES
DE4032942 1990-10-17

Publications (3)

Publication Number Publication Date
EP0481355A2 EP0481355A2 (en) 1992-04-22
EP0481355A3 EP0481355A3 (en) 1993-01-13
EP0481355B1 true EP0481355B1 (en) 1996-06-05

Family

ID=6416469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91117265A Expired - Lifetime EP0481355B1 (en) 1990-10-17 1991-10-10 Switching mechanism with an apparatus for controlling the influence of ambient characteristics

Country Status (8)

Country Link
US (1) US5237303A (en)
EP (1) EP0481355B1 (en)
JP (1) JP3241765B2 (en)
AT (1) ATE139056T1 (en)
AU (1) AU654291B2 (en)
DE (2) DE4032942A1 (en)
ES (1) ES2087943T3 (en)
GR (1) GR3020955T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2785717B1 (en) * 1998-11-05 2000-12-08 Schneider Electric Sa THERMAL RELAY WITH SPRING BLADE MECHANISM
DE10317277A1 (en) * 2003-04-11 2004-10-21 E.G.O. Elektrogerätebau GmbH Energy control device
DE102007005135A1 (en) * 2007-02-01 2008-08-07 Siemens Ag Electromechanical switching device for protecting electrical lines or consumers and using a thermal coupling in an electromechanical switching device
US8026784B2 (en) * 2007-08-07 2011-09-27 Hella Kgaa Ganged power circuit switches for on-board electrical system in motor vehicles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3634802A (en) * 1970-03-19 1972-01-11 Westinghouse Electric Corp Thermal cycling switch
DE3012175C2 (en) * 1980-03-28 1983-10-20 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Power clock for heating points, in particular in electric cookers
EP0043577A3 (en) * 1980-07-07 1982-09-08 Technar Incorporated Thermal switch and control circuit for diesel engine glow plug control
DE3103561A1 (en) * 1981-02-03 1982-08-26 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen DEVICE FOR COMPENSATING THE AMBIENT TEMPERATURE INFLUENCE ON DEVICES LIKE SWITCHES, REGULATING, CONTROL UNITS OR THE LIKE.
DE3223461C2 (en) * 1982-06-23 1986-09-11 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Temperature controller
DE3639186A1 (en) * 1986-11-15 1988-05-26 Ego Elektro Blanc & Fischer ELECTRIC SWITCHGEAR, ESPECIALLY FOR POWER CONTROL

Also Published As

Publication number Publication date
JP3241765B2 (en) 2001-12-25
DE59107886D1 (en) 1996-07-11
EP0481355A2 (en) 1992-04-22
ES2087943T3 (en) 1996-08-01
EP0481355A3 (en) 1993-01-13
ATE139056T1 (en) 1996-06-15
AU8592791A (en) 1992-04-30
US5237303A (en) 1993-08-17
GR3020955T3 (en) 1996-12-31
AU654291B2 (en) 1994-11-03
JPH04289624A (en) 1992-10-14
DE4032942A1 (en) 1992-04-23

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