EP0481355B1 - Appareil interrupteur comprenant un dispositif pour commander une influence charactéristiq ambiante - Google Patents

Appareil interrupteur comprenant un dispositif pour commander une influence charactéristiq ambiante 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
Authority
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
Other languages
German (de)
English (en)
Other versions
EP0481355A2 (fr
EP0481355A3 (en
Inventor
Robert Kicherer
Siegfried Mannuss
Willi Reichert
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.)
EGO Elektro Geraete AG
Original Assignee
EGO Elektro Geraete AG
EGO Elektro Gerate Blanc und Fischer GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EGO Elektro Geraete AG, EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Geraete AG
Publication of EP0481355A2 publication Critical patent/EP0481355A2/fr
Publication of EP0481355A3 publication Critical patent/EP0481355A3/de
Application granted granted Critical
Publication of EP0481355B1 publication Critical patent/EP0481355B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Crushing And Grinding (AREA)
  • Basic Packing Technique (AREA)
  • Container Filling Or Packaging Operations (AREA)
  • Selective Calling Equipment (AREA)
  • Air Bags (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Fixing For Electrophotography (AREA)

Claims (10)

  1. Appareil interrupteur comprenant un dispositif (1) pour commander une influence de la température ambiante sur l'appareil interrupteur (2), constitué par exemple par un interrupteur, un appareil de réglage, de commande ou analogue, qui comprend au moins un dispositif de commutation (5), avec des moyens pour influencer dans le sens d'une correction la caractéristique de commutation du dispositif de commutation (5) concerné en fonction de la température ambiante, et avec des moyens agissant élastiquement sur une partie au moins de cette influence, avec prévision d'au moins un palpeur de température ambiante (20), lequel influence la caractéristique de commutation du dispositif de commutation (5) concerné et détermine des mouvements et des courses de travail, ainsi que, en tant que moyen de correction (30), d'au moins un dispositif de correction influençant au moins une partie de ces mouvements de travail, dispositif qui comporte au moins un ressort de correction (31), déterminant une force élastique, qui s'oppose élastiquement à un mouvement de travail du palpeur de température ambiante (20) et s'appuie sur un contre-appui (27) essentiellement fixe, caractérisé en ce que le ressort de correction (31) est appuyé directement, en vue de sa fixation, sur le palpeur de température ambiante (20) coordonné et est réalisé sous la forme d'un ressort plat.
  2. Appareil interrupteur selon la revendication 1, caractérisé en ce que les moyens de correction (30) agissent en partie au moins élastiquement sur le mouvement de travail par la force élastique séparée du palpeur (20), et que, en particulier, les moyens de correction (30) s'opposent élastiquement à un mouvement de travail du palpeur de température ambiante (20) correspondant à une augmentation de la température ambiante et/ou la force élastique des moyens de correction (30) varie avec la course de travail du palpeur de température ambiante (20), en augmentant de préférence lorsque la température ambiante s'élève.
  3. Appareil interrupteur selon la revendication 1 ou 2, caractérisé en ce que la course de travail élastique utile d'au moins une partie des moyens de correction (30) est limitée, en particulier du fait qu'au-dessus d'une température ambiante prédéterminée, la course de travail d'au moins une partie du palpeur de température ambiante (20) est limitée par une butée.
  4. Appareil interrupteur selon une des revendications précédentes, caractérisé en ce qu'au moins un ressort de correction (31) sous la forme d'un ressort-lame est prévu, qu'un seul ressort correcteur (31) est prévu en particulier et/ou qu'au moins une portion d'au moins un ressort de correction (31) est immobilisée, essentiellement sans jeu, par rapport au palpeur de température ambiante (20), notamment au moyen d'une fixation par soudage ou analogue.
  5. Appareil interrupteur selon une des revendications précédentes, caractérisé en ce que le contre-appui (27) est prévu essentiellement en position fixe par rapport à un support (18) pour au moins un palpeur et/ou un corps de base (3) de l'appareil interrupteur (2), que, en particulier, au moins un ressort de correction (31) est disposé à plat dans une fente (32) entre le contre-appui et le palpeur de température ambiante (20) et que, de préférence, le contre-appui forme une butée (34) pour une partie au moins du palpeur (20).
  6. Appareil interrupteur selon une des revendications précédentes, caractérisé en ce que le palpeur de température ambiante (20) est formé par un bimétal réalisé en particulier pour avoir une forme coudée, le palpeur étant fixé par une branche (21) au support (18) et disposé de manière qu'une autre branche (22) fasse essentiellement saillie librement, le dispositif de correction (30) étant de préférence en prise avec la branche (22) faisant saillie librement et agissant dans le sens d'une correction par un élément d'actionnement (24) sur le dispositif de commutation (5).
  7. Appareil interrupteur selon la revendication 5 ou 6, caractérisé en ce que le support (18) possède une forme coudée et est constitué en particulier par une plaque (19) en forme de bande coudée insérée dans le corps de base (3), la plaque (19) formant de préférence le contre-appui par une branche (27) et étant traversée dans une ouverture (23) par le palpeur de température ambiante (20), et/ou qu'au moins un ressort de correction (31) est appuyé seulement par une butée sur le contre-appui (27) et est de préférence faiblement courbé en S entre ce contre-appui et l'appui sur le palpeur de température ambiante (20).
  8. Appareil interrupteur selon une des revendications 4 à 7, caractérisé en ce qu'au moins un ressort de correction (31) forme une partie fonctionnelle supplémentaire du dispositif (1), en particulier un élément de retenue pour l'élément d'actionnement (24), constitué par un organe d'ajustement (25) réglable, une fourche plate faisant de préférence saillie du ressort de correction (31) et pénétrant par ses dents de fourche (33) dans une partie filetée de l'organe d'ajustement (25) et/ou au moins un ressort de correction (31) formant un élément découpé sous la forme d'une languette dans une pièce en tôle et recourbée hors de cette pièce, élément qui est fixé ensemble avec cette pièce en tôle au palpeur de température ambiante (20).
  9. Appareil interrupteur selon une des revendications 4 à 8, caractérisé en ce qu'au moins un ressort de correction (31) est disposé essentiellement sur le côté éloigné du dispositif de commutation (5) du palpeur de température ambiante (20), lequel est de préférence appuyé directement, par l'élément d'actionnement (24), sur un bras de commutation, formé notamment, en partie au moins, par un bimétal de travail, susceptible d'être chauffé périodiquement, du dispositif de commutation (5).
  10. Appareil interrupteur selon une des revendications précédentes, caractérisé en ce que le dispositif (1) pour compenser l'influence de la température ambiante et/ou le dispositif de correction (30) est réalisé ou ajusté en vue de la correction d'une
EP91117265A 1990-10-17 1991-10-10 Appareil interrupteur comprenant un dispositif pour commander une influence charactéristiq ambiante Expired - Lifetime EP0481355B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4032942A DE4032942A1 (de) 1990-10-17 1990-10-17 Einrichtung zur steuerung eines umgebungs-einflusses an geraeten
DE4032942 1990-10-17

Publications (3)

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

Family

ID=6416469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91117265A Expired - Lifetime EP0481355B1 (fr) 1990-10-17 1991-10-10 Appareil interrupteur comprenant un dispositif pour commander une influence charactéristiq ambiante

Country Status (8)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2785717B1 (fr) * 1998-11-05 2000-12-08 Schneider Electric Sa Relais thermique dote d'un mecanisme a lame-ressort
DE10317277A1 (de) * 2003-04-11 2004-10-21 E.G.O. Elektrogerätebau GmbH Energiesteuergerät
DE102007005135A1 (de) * 2007-02-01 2008-08-07 Siemens Ag Elektromechanisches Schaltgerät zum Schutz von elektrischen Leitungen bzw. Verbrauchern und Verwendung einer thermischen Ankopplung in einem elektromechanischen Schaltgerät
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 (de) * 1980-03-28 1983-10-20 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Leistungstakter für Heizstellen, insbesondere in Elektroherden
EP0043577A3 (en) * 1980-07-07 1982-09-08 Technar Incorporated Thermal switch and control circuit for diesel engine glow plug control
DE3103561A1 (de) * 1981-02-03 1982-08-26 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Einrichtung zur kompensation des umgebungstemperatureinflusses an geraeten wie schaltern, regel-, steuergeraeten o.dgl.
DE3223461C2 (de) * 1982-06-23 1986-09-11 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Temperaturregler
DE3639186A1 (de) * 1986-11-15 1988-05-26 Ego Elektro Blanc & Fischer Elektro-schaltgeraet, insbesondere zur leistungssteuerung

Also Published As

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

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