EP0898291B1 - Appareil de commande de puissance - Google Patents

Appareil de commande de puissance Download PDF

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Publication number
EP0898291B1
EP0898291B1 EP98114913A EP98114913A EP0898291B1 EP 0898291 B1 EP0898291 B1 EP 0898291B1 EP 98114913 A EP98114913 A EP 98114913A EP 98114913 A EP98114913 A EP 98114913A EP 0898291 B1 EP0898291 B1 EP 0898291B1
Authority
EP
European Patent Office
Prior art keywords
power
contact
power control
control unit
adjusting device
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
EP98114913A
Other languages
German (de)
English (en)
Other versions
EP0898291A3 (fr
EP0898291A2 (fr
Inventor
Willi Reichert
Siegfried Mannuss
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 Geratebau 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 Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP0898291A2 publication Critical patent/EP0898291A2/fr
Publication of EP0898291A3 publication Critical patent/EP0898291A3/fr
Application granted granted Critical
Publication of EP0898291B1 publication Critical patent/EP0898291B1/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
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/26—Means for adjustment of "on" or "off" operating temperature by adjustment of abutment for "off" position of the movable contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/22—Means for adjustment of "on" or "off" operating temperature by adjustment of a member transmitting motion from the thermal element to contacts or latch

Definitions

  • the invention relates to a power control device according to the preamble of claim 1.
  • CH 391 057 A describes a control unit with a bimetal switch, which, for example, for a hotplate of an electric cooker can be used.
  • the release path is via a cam disk for a bimetallic element that controls a snap spring, set.
  • the counterstop for the Snap spring formed.
  • DE 36 39 186 describes an electrical switching device in which a position adjustment of an adjustment device the simultaneous adjustment of the power level and the switching hysteresis.
  • the performance level is also called "ED”, which means the relative Duty cycle is meant.
  • the underlying task is therefore to create a power control device that avoids the disadvantages of the prior art, in particular the Switching hysteresis within certain limits can be influenced, so that the cracking rate can be reduced in the medium performance range, the more precise setting of a performance level, especially in the lower and upper area allows and a larger contact distance ensures.
  • a mechanical power adjustment device is advantageous, in particular also a mechanical contact distance adjustment device, considered. This can be caused by a change in position or distance of assemblies or functional units due to mechanical loading respectively.
  • the power adjustment device advantageously has a position change of the device switch is a power cam with a varying radius on the outer radius of the device switch by a bias rests elastically pressed.
  • This type of position change has the advantage that any sequence of positions is set in principle can be. In this case, the outer radius determines the position of the device switch.
  • the contact distance adjusting device has a distance cam with a varying radius on the outside radius a device supporting and / or forming the counterstop in the form of an additional spring elastically pressed by a bias is applied.
  • the additional spring can Be leaf spring, part of which is bent so that it forms the counterstop for the switch contact.
  • both cams are mounted on one axis, the with an actuator by a user to adjust the performance level is rotatable, the change in position of both the device switch as well as the counterstop.
  • In progress can be set the rotary movement of the actuator with the axis either only in one direction and in this Case starting with the lowest power, or in both Directions. You can then either use the lowest Power level can be started or by slight twisting in the other direction the highest power level immediately can be set.
  • At least one of the two outer radii preferably the Outer radius at which the device switch is in contact with a Screening or the like is provided at least in sections, can be communicated to a user in this way what setting range it is in.
  • actuators mounted frontally under the hob an advantage because in this case the user with Set the desired level of performance with little practice can, without extra on the position of the actuator to have to look.
  • the outer radii of the cams are advantageous for one Increasing the setting accuracy of the performance at high and low levels of performance and a decrease in cracking rate middle shaped shaped. So follows from the course both cams the setting accuracy, the switching hysteresis and the course of the click rate over the ED.
  • the Outer radius of the power cam at a zero position of the power control unit to be maximum, and itself from this section on in a circumferential direction, the opposite to the direction of actuation of the power control unit is steady to the section of the zero position reduce.
  • the section of the zero position can be one Take radians of about 30 °. This allows the distance of the Device switch to the counter contact, for example, continuously be enlarged, which increases the responsiveness the device switch reduced, so that especially at high ED values the cracking rate is low.
  • the outer radius can between the position for the lowest level of performance and decrease that for the highest by about 30%. at the position for the highest level of performance can Increased additional decrease in the outer radius is an advantage be a significant increase in the To achieve ED value.
  • the outer radius of the spacer cam is particularly advantageous with a zero position of the power control unit maximum, decreases from this section on a direction opposite to the direction of actuation to a second section that roughly corresponds to the first section lies opposite and has a minimal outer radius, and increases from this point in a third section again to the section of the ZERO position. Consequently the counterstop is adjusted only in the first section roughly proportional to the change in position of the Devices switch. By increasing in the third section Outside radius the counterstop turns back towards it original position at low performance level, so that the setting accuracy in both areas about is equal to.
  • a reduction in the outer radius to about 70% in Area of the second section is particularly advantageous considered for the application of the invention, since the Cracking rate is sufficiently reduced.
  • the device switch can preferably be a snap switch, especially with a two-part bistable snap spring, be executed, the switching contact against at least one Switch position loaded. This way the contacts safe and reliable both switched and in their respective switch position, i.e. either the ON position or the OFF position.
  • Especially snap springs have the advantage that they switch gear very quickly and thus with a minimum of radio interference or contact erosion carry out.
  • the snap spring has a striking fork
  • the Switching operations of the contacts improved.
  • Particularly advantageous is the use of a two-part impact spring with a Punch fork that shifts in both directions performs particularly quickly. This causes annoying contact erosion or sticking of the contacts avoided and radio interference further decreased.
  • FIG. 1 is an internal view of a clocking Power control unit 11 shown for electric heaters. It has a device switch 12, which to the closes contact. This contact is in single from a fixed contact bridge 13 attached rounded counter contact 14 and a switching contact 15, which is attached to the device switch 12.
  • the Switch contact 15 is a commonly used dome-shaped Contact head attached by riveting.
  • the switch contact 15 is one at one end elongated bistable snap spring 16 attached and protrudes both sides over this over.
  • the snap spring has two elongated hairpin-shaped legs 22 on which the Switch contact 15 opposite end 17 on a support 18 are attached. Between the legs 22 of the snap spring 16 runs a snap bracket 19 which is close to the switch contact 15 supporting end of the snap spring bent upwards runs in the direction of the free end 17, and there arched curved under tension against one Abutment 20 is created.
  • This abutment is on one Support plate 21 attached and is preferably part of the carrier 18 also fastened on the support plate 21 educated.
  • the function of the device switch is basically as follows off: is the point at which the snap bracket 19 abuts the abutment 20, above the level of two hairpin-shaped legs 22 of the snap spring 16, so the snap spring 16 is in a first position.
  • the switching contact 15 becomes against the counter contact 14 pressed. Will now on the free end 17 of the snap spring 16th Pressure exerted and this down according to FIG. 1 deflected, the point approaches the snap bracket 19 in the abutment 20 of the level of the legs 22.
  • the means that the switch contact 15 carrying the end of Snap spring 16 abruptly by the snap bracket 19 is bent away below. In this way the switch contact is located 15 no longer on the counter contact 14 and the contact or the device switch 12 is in a second position open.
  • the switching process of the snap spring 16 is triggered by an actuator in the form of a curved bimetal strip 24.
  • This carries on one of the snap springs 16 opposite top, which is mostly straight, a heating element 25 or the like. With one end, the hook-shaped is bent, the bimetallic strip 24 is exposed End 17 of the snap spring 16.
  • the combination is the two metals that cause the bimetal effect are chosen that the metal with the larger coefficient of expansion the side of the bimetallic strip adjacent to the heating element 25 24 lies.
  • the heating element 25 is only when closed Contact between the switching contact 15 and the counter contact 14 flows through with electricity, as well as parallel connected electrical heating device with power.
  • the heating element 25 heats the Bimetal strip 24, this changes its shape and presses due to an increasing curvature in the direction of the snap spring 16 on their free end 17.
  • the free end 17 of the snap spring 16 is so far pressed down that the leg 22 below the Switchover point is whereupon the snap spring snaps and releases the switching contact 15 from the counter contact 14.
  • the bimetallic strip 24 migrates again back to its original position. If the Switching point, the snap spring 16 snaps back again, the switching contact 15 bears against the counter contact 14 and the The heating process starts again.
  • This metal element 31 is biased so that the support plate 21 against the outer radius of the power cam 28 is present.
  • this power cam has 28 a variable radius. Through a Rotation of an operator on the axis 29 depends on set position of the projection 27 at another Instead of on the outer circumference of the power cam 28, and depending on the radius of the disc at this point the support plate 21 and thus the snap spring 16 in one specific position to the counter contact 14 and the bimetallic strip 24th
  • the radius is in a position with a low power level the power cam large so that the free end 17 is close to the bimetallic strip 24 and this already after a short time, switching the snap spring 16 and so a separation of the contacts 14 and 15 can cause.
  • the power cam shows a position with high power 28 a small radius so that the free end 17th is located at a greater distance from the bimetallic strip 24. As a result, this has a larger path (corresponds to one longer period) to move the snap spring 16 to Bring to snap.
  • the switching contact 15 When the contact is open, the switching contact 15 lies with it on the side facing away from the counter contact 14 on a counter stop 33 at.
  • the distance between the switch contact 15 and the counter-stop 33 is designated D and determines how far the spring 16 after actuation of its free end 17 snapped.
  • D The larger D is, the lower they are Leg 22 after snapping below the abutment 20th and consequently the bimetallic strip 24 must continue upwards hike to reach the switch point.
  • variable contact pitch D achieved in that the counterstop 33 part is a wiper spring 34 which has an angled end is attached to the housing of the power control device 11 and the other free end 35 is slightly hook-shaped is. It lies on the outer radius of a second distance cam 36, which is adjacent to the first cam 28 is located on the axis 29. So the distance adjustment device educated.
  • the distance cam plate 36 also a variable radius.
  • the resilient Attachment of the wiper spring 34 to the housing becomes this in every position against the outer radius of the distance cam 36 pressed.
  • the counter stop 33 thus changes its position depends on the radius of the distance cam 36th
  • the shape of the cams 28 and 36 is as follows described:
  • the power cam 28 has one for such applications known course of the outer radius.
  • a ZERO position of the power control device 11 is the Radius maximum to continuously decrease up to a place for maximum performance 38 where he has an additional Has indentation inwards.
  • This indentation 38 not only increases the middle one due to its reduced radius Power output once again considerably, but gives you Users the clearly noticeable feedback that the top one Power level is set.
  • After the indentation 38 is the section 37 of the ZERO position.
  • the course of the distance cam 36 corresponds to Area of section 37 that of the power cam 28.
  • the radius then takes up to a second section 39 about from section 37 more than at Power cam 28 to continue from there again to climb to a third section, the Indentation 38 corresponds. That means that the radius first decreased and then enlarged.
  • the contact distance D is small in the areas in which a high setting accuracy and a safe Function of the device switch is required. These are the lower and the upper performance range. In the medium performance range in which the requirements for setting accuracy but the cracking rate is lower contact distance D is greater.
  • FIG. 2 shows the power control device 11 from FIG. 1 shown again.
  • the setting is Power from a low power in Fig. 1 by Twisting the axis 29 changed to a medium power Service.
  • the projection 27 and the end of the wiper spring 34 in each section 39 the corresponding cam, the ZERO position section 37 is roughly opposite.
  • the end 35 of the Grinder spring 34 a good distance away from the snap spring 16 is located as the projection 27 of the support plate 21.
  • the legs 22 of the snap spring 16 a little further above the switchover point on Abutments 20 are as in Fig. 1. This means that the free end 17 of the snap spring 16 further down must be pressed until the snap spring snaps.
  • the function is the same as in FIG. 1.
  • FIG. 3 shows the power control device 11 with the power setting from Fig. 2, but in a position in the snap spring 16 is snapped and the switch contact 15 has separated from the counter contact 14.
  • the switch contact 15 is now with its back on the counter stop 33 at. It can clearly be seen that the legs 22 of the snap spring 16 lie below the abutment 20. Based on this Fig. 3 can be the inventive adjustment of the contact distance through the movable counter contact 33 particularly represent well. Due to the changing radii of the Cam discs 28 and 36 are not only the device switch 12 changed its position to the bimetal strip 24, but also the relative position between the counterstop 33 and the support plate 21 or the point at which the counter-stop 33 is closest to the support plate 21.
  • the wiper spring 34 is preferably made of the same resilient Material like the snap spring 16 made.
  • the counter attack 33 is the right-angled turn of a Section formed in the direction of the switching contact 15. He can through a cutout in the support plate 21st protrude.
  • FIG. 4 is a diagram 40 showing the click rates above the ED shows a dashed click rate curve 41 a power control device according to the prior art shown. It begins at a starting point 46 with a low click rate of about one click per minute, is in its course with increasing ED first in a curve curved at the top and reaches one at its uppermost point 42 Cracking rate of over 4 cracks per minute. From an ED of about 50 percent, curve 41 drops again to one Endpoint 47 with a click rate of approximately one click per Minute.
  • the solid click rate curve 44 of the invention Power control device 11 also begins at the starting point 46, but rises less sharply to a top one Point 45, the at less than two pops per minute lies, and falls from there to the end point 47. Man clearly sees the reduction in the cracking rate in the medium performance range.

Landscapes

  • Steering Control In Accordance With Driving Conditions (AREA)
  • Control Of Eletrric Generators (AREA)
  • Cookers (AREA)
  • Control Of Stepping Motors (AREA)
  • Control Of Resistance Heating (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Breakers (AREA)
  • Push-Button Switches (AREA)
  • Control Of Electric Motors In General (AREA)
  • Electric Stoves And Ranges (AREA)
  • Thermally Actuated Switches (AREA)
  • Control Of Position Or Direction (AREA)
  • Feedback Control In General (AREA)

Claims (9)

  1. Appareil de commande de puissance avec dispositif de réglage pour un commutateur d'appareil (12) contenu à l'intérieur, en particulier pour des appareils de chauffage électriques, dont le changement de position entraíne le changement du niveau de puissance réglable et qui porte un contact de commutation (15) qui, en position MARCHE, s'appuie à un contact opposé (14) et fournit en particulier de la puissance à l'appareil de chauffage électrique et, en position ARRÊT, s'appuie à une contre-butée (33) avec un intervalle de contact variable (D) par rapport au contact opposé, sachant que le dispositif de réglage présente un dispositif de réglage de puissance pour le niveau de puissance et un dispositif de réglage de l'intervalle de contact distinct du premier, ainsi qu'un moyen de commande (29) pour les manoeuvrer, le dispositif de réglage de l'intervalle de contact présentant ici une came d'intervalle (36) à rayon variable,
    caractérisé en ce qu'un dispositif en forme de ressort auxiliaire (34) portant et/ou formant au moins en partie la contre-butée (33) s'appuie de manière élastique sous une précontrainte au rayon extérieur de la came d'intervalle.
  2. Appareil de commande de puissance selon la revendication 1, caractérisé en ce qu'aussi bien le dispositif de réglage de puissance que le dispositif de réglage de l'intervalle de contact sont maneeuvrés simultanément avec des moyens de commande communs (29).
  3. Appareil de commande de puissance selon la revendication 1 ou 2, caractérisé en ce que le dispositif de réglage de puissance, en particulier également le dispositif de réglage de l'intervalle de contact, sont formés de manière mécanique, de préférence au moyen de changements de position suite à une contrainte mécanique.
  4. Appareil de commande de puissance selon l'une des revendications précédentes, caractérisé en ce que le dispositif de réglage de puissance pour le changement de position du commutateur d'appareil (12) présente une came de puissance (28) à rayon variable, sur le rayon extérieur de laquelle le commutateur d'appareil s'appuie de manière élastique sous une précontrainte.
  5. Appareil de commande de puissance selon la revendication 1 ou 4, caractérisé en ce que les deux cames (28, 36) sont fixées à un axe qui peut être tourné par l'utilisateur à l'aide d'un élément de commande.
  6. Appareil de commande de puissance selon la revendication 4 ou 5, caractérisé en ce que le rayon extérieur de la came de puissance (28) est maximal à la position ZÉRO de l'appareil de commande de puissance, et se réduit continuellement à partir de cette section et jusqu'à la section de la position ZÉRO dans un sens circonférentiel qui est opposé au sens de commande privilégié de l'appareil de commande de puissance.
  7. Appareil de commande de puissance selon la revendication 5 ou 6, caractérisé en ce que le rayon extérieur de la came d'intervalle (36) est maximal à la position ZÉRO (37) de l'appareil de commande de puissance, se réduit à partir de cette section dans le sens opposé au sens de commande privilégié jusqu'à une deuxième section (39) qui fait approximativement face à la première section et qui présente un rayon extérieur minimal, et, à partir de là, augmente à nouveau dans une troisième section jusqu'à la section de la position ZÉRO.
  8. Appareil de commande de puissance selon l'une des revendications précédentes, caractérisé en ce que le commutateur de l'appareil (12) est réalisé sous forme d'interrupteur sensible, en particulier avec un ressort à déclic (16) bistable en deux parties, qui sollicite le contact de commutation (15) dans au moins une position.
  9. Appareil de commande de puissance selon la revendication 8, caractérisé en ce que le ressort à déclic (16) présente une fourche percutante afin d'améliorer les processus de commutation des contacts (14, 15).
EP98114913A 1997-08-21 1998-08-08 Appareil de commande de puissance Expired - Lifetime EP0898291B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19736308 1997-08-21
DE19736308A DE19736308A1 (de) 1997-08-21 1997-08-21 Leistungssteuergerät

Publications (3)

Publication Number Publication Date
EP0898291A2 EP0898291A2 (fr) 1999-02-24
EP0898291A3 EP0898291A3 (fr) 1999-06-23
EP0898291B1 true EP0898291B1 (fr) 2004-05-06

Family

ID=7839662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98114913A Expired - Lifetime EP0898291B1 (fr) 1997-08-21 1998-08-08 Appareil de commande de puissance

Country Status (9)

Country Link
US (1) US6064045A (fr)
EP (1) EP0898291B1 (fr)
AT (1) ATE266252T1 (fr)
AU (1) AU727574B2 (fr)
DE (2) DE19736308A1 (fr)
ES (1) ES2219816T3 (fr)
PL (1) PL187381B1 (fr)
TR (1) TR199801628A2 (fr)
ZA (1) ZA987520B (fr)

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
DE10317277A1 (de) * 2003-04-11 2004-10-21 E.G.O. Elektrogerätebau GmbH Energiesteuergerät
EP1569257B1 (fr) 2004-02-24 2006-07-12 Electrovac, Fabrikation elektrotechnischer Spezialartikel Gesellschaft m.b.H. Capteur de température
DE102004020977B4 (de) * 2004-04-22 2007-06-21 E.G.O. Elektro-Gerätebau GmbH Vorrichtung zur variablen Einstellung der Leistung einer Heizeinrichtung mit mindestens zwei Heizkreisen
US7180038B2 (en) * 2004-08-03 2007-02-20 E.G.O. Elektro-Geraetebau Gmbh Device for switching on and off several heating mechanisms of cooking equipment as well as cooking equipment with such a device
US7145109B2 (en) * 2004-08-03 2006-12-05 E.G.O. Elektro-Geraerebau Gmbh Appliance for switching on and off several heating devices of a cooker, as well as cooker having such an appliance
DE102005023722A1 (de) * 2005-05-18 2006-11-23 E.G.O. Elektro-Gerätebau GmbH Elektrische Kontaktverbindung und Verfahren zur Herstellung
US8933377B2 (en) 2011-12-09 2015-01-13 E.G.O. Elektro-Gerätebau GmbH Control device for an electrical heating device for a cooking field, cooking field and method for operating such an electrical heating device
US8884195B2 (en) 2011-12-09 2014-11-11 E.G.O. Elektro-Gerätebau GmbH Heating device, method of producing a heating device and method for operating a heating device
DE102013216290B4 (de) 2013-08-16 2015-09-03 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Verfahren zum Betrieb einer Heizeinrichtung
US11566793B2 (en) * 2015-01-20 2023-01-31 Robertshaw Controls Company Electro-mechanical energy regulator providing enhanced simmer performance
KR200488089Y1 (ko) 2018-08-07 2018-12-12 주식회사 박전자 전기레인지의 온도제어장치
US11810741B2 (en) 2020-11-09 2023-11-07 Robertshaw Controls Company Increased push travel alternative for energy regulator

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DE1565682A1 (de) * 1966-09-17 1970-03-26 Licentia Gmbh Temperaturabhaengige Schaltvorrichtung fuer elektrisch beheizte Geraete
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GB9409489D0 (en) * 1994-05-12 1994-06-29 Diamond H Controls Ltd Energy regulator

Also Published As

Publication number Publication date
ZA987520B (en) 1999-02-23
DE59811309D1 (de) 2004-06-09
EP0898291A3 (fr) 1999-06-23
PL328046A1 (en) 1999-03-01
PL187381B1 (pl) 2004-06-30
TR199801628A3 (tr) 1999-03-22
US6064045A (en) 2000-05-16
ATE266252T1 (de) 2004-05-15
AU727574B2 (en) 2000-12-14
DE19736308A1 (de) 1999-02-25
AU8088398A (en) 1999-03-04
ES2219816T3 (es) 2004-12-01
EP0898291A2 (fr) 1999-02-24
TR199801628A2 (xx) 1999-03-22

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