EP0481355A2 - 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
EP0481355A2
EP0481355A2 EP91117265A EP91117265A EP0481355A2 EP 0481355 A2 EP0481355 A2 EP 0481355A2 EP 91117265 A EP91117265 A EP 91117265A EP 91117265 A EP91117265 A EP 91117265A EP 0481355 A2 EP0481355 A2 EP 0481355A2
Authority
EP
European Patent Office
Prior art keywords
ambient temperature
spring
correction
temperature sensor
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91117265A
Other languages
German (de)
English (en)
Other versions
EP0481355A3 (en
EP0481355B1 (fr
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 control device for devices, the working characteristics of which are influenced or are intended to be influenced by their ambient temperature.
  • Such devices can e.g. Switching devices, such as switches, regulating, 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 .
  • room temperature e.g. around 20 ° C
  • 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. Eg at high ambient temperatures then, however, overcompensation occurs, which means that the full performance is already achieved with a device setting that is below the setting value for this maximum performance.
  • the invention is furthermore based on the object of creating 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, have a very precise influence on its control characteristics enables.
  • the working movement of several sensors or a single ambient temperature sensor can, depending on the requirements to be met by the switching characteristics, by 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 work path can be influenced in very different ways, regardless of such resilient elements, which may be formed by 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 sensor length be different temperature dependent on partial routes.
  • a plurality of correction devices, stops and correction or compensation actuators can also be provided.
  • 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 heater that is switched on and off periodically with the pulses acts on a work sensor or a working bimetal which correspondingly periodically actuates at least one work contact, such as a snap switch, via a contact spring.
  • the correction device is therefore expediently designed in such a way that, with a spring separate from the other springs mentioned in the switching device, it counteracts the working movement of the ambient temperature sensor which results from an increase in the ambient temperature.
  • 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 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 characteristics for the relative duty cycle in relation to essentially every manual device setting in the case 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 limiting the travel 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 projecting corner of the base of the device.
  • the spring is essentially formed in one piece by an already 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 via a snap spring 8 on a contact carrier 9 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 switch 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 heating 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 actuatable 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 inserting it 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 joint 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 thereto.
  • 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 possibly 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 bore 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 switch cam 11 and the joint 15 on the side of the work sensor 12 remote from the switch 4.
  • the shorter carrier leg 27 of the carrier 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, in any case it is expediently arranged essentially rigid.
  • a non-positive 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 carrier 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 the longitudinal direction beyond 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 lies 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 with 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 designed trapezoidal in such a way 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 then the switching cam 11 under the effect of the control heater 13 must carry out a longer switching path 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 have an immediate effect 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

  • Thermally Actuated Switches (AREA)
  • Control Of Resistance Heating (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)
  • Selective Calling Equipment (AREA)
  • Air Bags (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Crushing And Grinding (AREA)
  • Fixing For Electrophotography (AREA)
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
DE4032942 1990-10-17
DE4032942A DE4032942A1 (de) 1990-10-17 1990-10-17 Einrichtung zur steuerung eines umgebungs-einflusses an geraeten

Publications (3)

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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012175A1 (de) * 1980-03-28 1981-10-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Temperaturregler fuer heizstellen, insbesondere energieregler fuer kochplatten in elektroherden
EP0043577A2 (fr) * 1980-07-07 1982-01-13 Technar Incorporated Commutateur thermique et circuit de commande pour les bougies de préchauffage de moteurs diesel
EP0057460A2 (fr) * 1981-02-03 1982-08-11 E.G.O. Elektro-Geräte Blanc u. Fischer Dispositif pour la regulation de la température d'appareils chauffés électriquement
DE3223461A1 (de) * 1982-06-23 1983-12-29 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Temperaturregler
EP0268098A2 (fr) * 1986-11-15 1988-05-25 E.G.O. Elektrogeräte AG Appareil de commutation électrique, en particulier pour commande de puissance

Family Cites Families (1)

* 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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012175A1 (de) * 1980-03-28 1981-10-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Temperaturregler fuer heizstellen, insbesondere energieregler fuer kochplatten in elektroherden
EP0043577A2 (fr) * 1980-07-07 1982-01-13 Technar Incorporated Commutateur thermique et circuit de commande pour les bougies de préchauffage de moteurs diesel
EP0057460A2 (fr) * 1981-02-03 1982-08-11 E.G.O. Elektro-Geräte Blanc u. Fischer Dispositif pour la regulation de la température d'appareils chauffés électriquement
DE3223461A1 (de) * 1982-06-23 1983-12-29 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Temperaturregler
EP0268098A2 (fr) * 1986-11-15 1988-05-25 E.G.O. Elektrogeräte AG Appareil de commutation électrique, en particulier pour commande de puissance

Also Published As

Publication number Publication date
EP0481355A3 (en) 1993-01-13
AU8592791A (en) 1992-04-30
GR3020955T3 (en) 1996-12-31
DE59107886D1 (de) 1996-07-11
EP0481355B1 (fr) 1996-06-05
ES2087943T3 (es) 1996-08-01
AU654291B2 (en) 1994-11-03
JP3241765B2 (ja) 2001-12-25
US5237303A (en) 1993-08-17
ATE139056T1 (de) 1996-06-15
JPH04289624A (ja) 1992-10-14
DE4032942A1 (de) 1992-04-23

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