EP0057460B1 - Dispositif pour la regulation de la température d'appareils chauffés électriquement - Google Patents

Dispositif pour la regulation de la température d'appareils chauffés électriquement Download PDF

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Publication number
EP0057460B1
EP0057460B1 EP82100725A EP82100725A EP0057460B1 EP 0057460 B1 EP0057460 B1 EP 0057460B1 EP 82100725 A EP82100725 A EP 82100725A EP 82100725 A EP82100725 A EP 82100725A EP 0057460 B1 EP0057460 B1 EP 0057460B1
Authority
EP
European Patent Office
Prior art keywords
bimetallic strip
compensating
stop
working
bimetal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82100725A
Other languages
German (de)
English (en)
Other versions
EP0057460A3 (en
EP0057460A2 (fr
Inventor
Jürgen Sixt
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 Geratebau GmbH
Original Assignee
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 Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT82100725T priority Critical patent/ATE9936T1/de
Publication of EP0057460A2 publication Critical patent/EP0057460A2/fr
Publication of EP0057460A3 publication Critical patent/EP0057460A3/de
Application granted granted Critical
Publication of EP0057460B1 publication Critical patent/EP0057460B1/fr
Expired 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 the temperature of electrically heated devices with a working bimetal which determines the intermittent duty cycle of the device and a compensating bimetal which counteracts the influence of the ambient temperature on the working bimetal, in which device the compensating bimetal which due to increasing ambient temperature deformation of the working bimetal only up to a certain value of the ambient temperature is largely canceled out by continuously increasing its own deformation, while the compensation bimetal comes to a stop at ambient temperatures above this value.
  • the object of the invention is to adjust the compensation in the upper temperature range in a simple and uncomplicated manner to a value corresponding to or approximating the actual conditions.
  • This object is achieved according to the invention in that the stop between the fixed end of the compensation bimetal and the effective point of attack is arranged such that, at temperatures above the certain value, the deformation of the partial length of the compensation bimetal lying between the point of attack and the stop is reduced accordingly Compensation effect can continue to work.
  • the bimetal can be arranged parallel to a snap switch, the support of which forms the stop. No additional component is therefore required here in order to put the invention into practice.
  • the power control device 11 has a housing 12 which has the shape of a substantially square box which is open on one flat side. It is used for the infinitely adjustable control of the output, in particular of electric cooking and heating devices in individual output pulses with variable relative duty cycle.
  • the power can be adjusted by means of an adjusting shaft 23 and a curve 19 which is non-rotatable thereon.
  • the curve 19 acts on one end 70 of a compensation bimetal 26, which is pressed against the curve by a spring 34 and is connected at the other end in the region of an axis of rotation 28 to the carrier 29 of a snap switch 27.
  • the snap switch 27 has a snap spring 30 consisting of a thin spring plate, the spring tongue of which is supported on a bent projection 71 of the snap switch carrier under kink pretension. At the free end, the snap spring 30 carries a contact 31 which can cooperate with a contact 32 fixed on the power control unit. The snap spring is received at its end opposite the contact 31 on a screw-like adjustable counter bearing 33.
  • a working bimetal 36 in the form of an L-shaped bimetal lever is pivotally mounted on the housing 12 about an axis of rotation 37.
  • the snap spring is actuated via a bent projection 44 of an L-leg 43 of the working bimetal 36.
  • the working bimetal is about the axis of rotation 37 relative to the housing 12 under the effect of the bimetal bend in the long leg 38 of the latch, which is arranged transversely to the snap switch Bimetal lever 43 pivotable.
  • the free end of the leg 38 is supported on an intermediate wall 42 by an adjusting screw 40 and under the action of a coil spring 41.
  • the intermediate housing wall 42 separates one Chamber 74 in which the heated leg 38 of the working bimetal 36 is located.
  • the chamber 74 is ventilated to the outside.
  • the rest of the switch part which in particular contains the snap switch 27 and the compensation bimetal 26, remains largely unaffected by the heat of the working bimetal 36 and its heating.
  • the temperature of the power control unit can increase to quite considerable temperatures due to poor heat dissipation to the outside or due to external heating when installed in a stove, oven or the like.
  • the compensation bimetal 26 counteracts this influence, which drives the temperature of the working bimetal 36 up and thus produces a greater deflection, which simulates a lower power setting, by bending when heated so that the distance between it and the snap-action switch carrier is smaller becomes.
  • the compensation bimetal 26 in the vicinity of its bent end 70 resting against the curve has a second, opposite bend 75, which is produced by the compensation bimetal 26 being forked at its free end and one section of material is bent up and the other is bent down. It is possible to provide one bend 70 and 75, but two bends 75 could also be provided parallel to one another for reasons of symmetry, in the middle of which there is a bend 70 or vice versa.
  • the offsets are V-shaped or arc-shaped to ensure a smooth contact surface on the curve 19 or the switch carrier 29.
  • the power control unit is shown in the switched-off state. If, by turning the curve 19 via the setting shaft 23, a power setting is carried out, the snap-action switch carrier 29 is pivoted counter-clockwise via the divided compensation bimetal 26, the snap spring which until then has been held in the switched-off position by the lever end 44 acting on the actuating point, the two contacts 31, 32 closes. As a result, current is supplied to the consumer, for example a hotplate, but also the heating 39 of the working bimetal 36, which expands in such a way that after a certain time the lever end 44 brings the snap switch back to the off position. After the bimetal 36 has cooled, the heating of which has also been switched off, the snap switch switches on again. This results in a switch-on and switch-off control that can be set in the relative duty cycle.
  • the compensation bimetal 26 in the drawing is deflected downward, that is to say toward the snap switch carrier 29. This continues until the temperature range is reached in which a further deflection of the compensation bimetal would lead to overcompensation.
  • the offset 75 of the compensation bimetal 26 comes into contact with the switch carrier, which forms a stop for the offset 75. This prevents the further deflection of the compensation bimetal 26 in the region between the offset 75 and the other end 76 of the compensation bimetal.
  • An effective compensation deflection of the bimetal remains only between the contact point of the offset 75 on the support 29 and the contact point of the offset 70 on the curve 19.
  • the embodiment described here in which the compensation bimetal stops on the snap switch carrier, is advantageous in the pivotable arrangement of the compensation bimetal / snap switch unit. If the arrangement cannot be pivoted as a whole, the stop could also be fixed to the housing. By arranging the stop accordingly, it would even be possible, if necessary, to generate counter-compensation.

Claims (4)

1. Dispositif de régulation de la température d'appareils chauffés électriquement, comportant un bilame de travail (36) qui détermine la durée d'enclenchement intermittente de l'appareil, ainsi qu'un bilame de compensation (26) qui agit à l'encontre de l'influence de la température ambiante sur le bilame de travail (36), dispositif dans lequel le bilame de compensation (26), par sa propre déformation augmentant de façon continue, supprime dans une large mesure la déformation du bilame de travail (36) résultant d'un accroissement de la température ambiante seulement jusqu'à une valeur déterminée de la température ambiante, tandis que ce bilame de compensation (26) vient s'appliquer contre une butée en présence de températures ambiantes excédant ladite valeur, caractérisé par le fait que la butée est intercalée, entre l'extrémité fixe (76) du bilame de compensation (26) et le point effectif de venue en prise (70), de telle sorte que, en présence de températures excédant la valeur déterminée, la déformation de la longueur partielle du bilame de compensation (26) située entre le point de venue en prise (70) et la butée puisse continuer d'agir avec un effet de compensation diminué en conséquence.
2. Dispositif selon la revendication 1, caractérisé par le fait que le bilame de compensation (26) est subdivisé, à son extrémité éloignée de l'extrémité fixe, en au moins deux tronçons (70, 75) parmi lesquels l'un vient s'appliquer contre la butée (29) et l'autre forme le point effectif de venue en prise.
3. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que le bilame de compensation (26) est disposé parallèlement à un interrupteur à déclic (27) dont le support forme la butée (29).
4. Dispositif selon la revendication 3, caractérisé par le fait que l'interrupteur à déclic (27) avec son support (29) et le bilame de compensation (26) forment un bloc solidaire pouvant pivoter autour d'un axe (28) ; par le fait que l'extrémité fixe (76) du bilame de compensation (26) est reliée au support (29) ; et par le fait que le point d'attaque peut être actionné par un organe d'ajustement (19).
EP82100725A 1981-02-03 1982-02-02 Dispositif pour la regulation de la température d'appareils chauffés électriquement Expired EP0057460B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100725T ATE9936T1 (de) 1981-02-03 1982-02-02 Regeleinrichtung fuer die temperatur elektrisch beheizter geraete.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813103561 DE3103561A1 (de) 1981-02-03 1981-02-03 Einrichtung zur kompensation des umgebungstemperatureinflusses an geraeten wie schaltern, regel-, steuergeraeten o.dgl.
DE3103561 1981-02-03

Publications (3)

Publication Number Publication Date
EP0057460A2 EP0057460A2 (fr) 1982-08-11
EP0057460A3 EP0057460A3 (en) 1982-09-01
EP0057460B1 true EP0057460B1 (fr) 1984-10-17

Family

ID=6123920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100725A Expired EP0057460B1 (fr) 1981-02-03 1982-02-02 Dispositif pour la regulation de la température d'appareils chauffés électriquement

Country Status (4)

Country Link
EP (1) EP0057460B1 (fr)
AT (1) ATE9936T1 (fr)
DE (2) DE3103561A1 (fr)
YU (1) YU43510B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4032942A1 (de) * 1990-10-17 1992-04-23 Ego Elektro Blanc & Fischer Einrichtung zur steuerung eines umgebungs-einflusses an geraeten
CN112616280B (zh) * 2020-12-23 2022-07-05 南昌洋深电子科技有限公司 一种银行中控室信号设备保护装置
CN114613643B (zh) * 2022-03-24 2024-03-29 绍兴中新电器有限公司 带热补偿耦合器及其应用
CN115810509B (zh) * 2022-12-16 2023-10-03 佛山市九龙机器有限公司 一种双回路温控器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427945A (en) * 1942-12-05 1947-09-23 Westinghouse Electric Corp Electric hot plate with vesseltemperature control
GB763892A (en) * 1955-01-07 1956-12-19 Richard Collier An improved thermally-responsive electric heat regulating switch
US2824192A (en) * 1956-10-05 1958-02-18 Westinghouse Electric Corp Thermally actuated switch
DE1052007B (de) * 1957-11-16 1959-03-05 Ernst Dreefs G M B H Stetig einstellbarer Energieregler fuer elektrisch beheizte Geraete
CH448305A (de) * 1965-12-22 1967-12-15 Licentia Gmbh Schalteinrichtung zur Temperaturregulierung
DE1615231C3 (de) * 1967-04-14 1975-02-13 E.G.O. Elektro-Geraete Blanc U. Fischer, 7135 Oberderdingen Leistungssteuerung von Elektrowärmegeräten
DE2625716C3 (de) * 1976-06-09 1979-10-11 E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen Leistungssteuergerät

Also Published As

Publication number Publication date
DE3260973D1 (en) 1984-11-22
EP0057460A3 (en) 1982-09-01
DE3103561A1 (de) 1982-08-26
YU43510B (en) 1989-08-31
EP0057460A2 (fr) 1982-08-11
ATE9936T1 (de) 1984-11-15
YU23482A (en) 1985-10-31

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