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EP0993015B1 - Dispositif de commutation pour appareil de chauffage électrique - Google Patents

Dispositif de commutation pour appareil de chauffage électrique Download PDF

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Publication number
EP0993015B1
EP0993015B1 EP99119587A EP99119587A EP0993015B1 EP 0993015 B1 EP0993015 B1 EP 0993015B1 EP 99119587 A EP99119587 A EP 99119587A EP 99119587 A EP99119587 A EP 99119587A EP 0993015 B1 EP0993015 B1 EP 0993015B1
Authority
EP
European Patent Office
Prior art keywords
spring
switching device
rod
switch
actuating part
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
EP99119587A
Other languages
German (de)
English (en)
Other versions
EP0993015A2 (fr
EP0993015A3 (fr
Inventor
Heinz Petri
Siegfried Mannuss
Eugen Wilde
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 EP0993015A2 publication Critical patent/EP0993015A2/fr
Publication of EP0993015A3 publication Critical patent/EP0993015A3/fr
Application granted granted Critical
Publication of EP0993015B1 publication Critical patent/EP0993015B1/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
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
    • 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 switching device according to the preamble of Claim 1 for an electric heater.
  • EP-A-0225490 shows a switching device of the aforementioned type.
  • An actuator for the switch is here with a spring element connected by spot welding.
  • Another switching device of the aforementioned type is, for example known from DE-OS 28 39 161.
  • This points as an actuator a one-sided lever through which a rod-shaped Longitudinal element is guided. A fixation takes place via a coil spring supported on the base, the lever against a screw thread at the end of the Stab led mother presses. The on the screw thread of the Stabes running mother serves as an adjustment device.
  • two actuating pins are used, each in face the opposite direction and press two switches.
  • the invention has for its object a aforementioned Switching device to create the disadvantages of the stand the technology avoids, in particular reduces the assembly effort and enables reliable operation.
  • An actuator can leaf spring on the Support the base, especially with both end areas Increase the spring effect.
  • the longitudinal element can on the Attack actuator, preferably at least has an actuating part for contact with the switch.
  • Spring element and the at least one actuating part and / or the actuating device are made from a single piece of material.
  • a particularly simple design can be made from a flat material worked out and shaped accordingly by bending.
  • a Another possibility is, for example, a firm connection by gluing or welding, possibly also pressing.
  • a One-piece covers the items in the installed state can act as a single part, the individual parts in at least a positive connection in a direction other than the assembly direction exhibit.
  • the spring element is preferably designed as a compression spring in order to achieve a precise To ensure work.
  • the spring element is preferably like a leaf spring.
  • a leaf spring is advantageous with both end areas or ends held in the base, in particular by spring force caused concern in investment areas.
  • a leaf spring can be beneficial essentially transverse to the direction of expansion of the temperature sensor run, whereby unwanted shear forces or the like are avoided can.
  • the temperature sensor is particularly preferably located or grips approximately in the center on the leaf spring so that it is loaded evenly.
  • the actuator runs advantageously in the vicinity of the temperature sensor, in particular it is arranged approximately in the middle of the leaf spring.
  • the actuating part advantageously has two protruding from the spring element Legs to rest on the switch, in particular it is in approximately U-shaped.
  • the U-shaped legs are preferred rotated by approx. 90 ° to the longitudinal extension of the leaf spring.
  • the thigh can each be led to different switches, preferably lying them at the same switch.
  • the temperature sensor can point directly into the U-shape or walk into it.
  • a mechanical connection between the temperature sensor is preferred and an adjustable actuator Transmission, in particular an adjustment device.
  • the Adjustment device advantageously engages the temperature sensor at, especially at its end.
  • the Adjustment device on the longitudinal element over the pipe can survive.
  • a preferred storage option for the adjustment device is on the actuator, in particular it is on it attached. In one execution option, it can be in the Attack or center the center of a U-shaped operating part be included.
  • the spring element a receptacle for the adjusting device a, especially with a one-piece training of Spring element and actuating part.
  • a holder for the adjustment device can be a thread for be an adjustment screw, preferably in the direction of Longitudinal element and / or in the direction of actuation of the switch runs. By changing the pitch of the adjusting screw the adjustment accuracy can be varied.
  • the transmission of the actuating force can be done through the switch and / or the switching spring, in particular through a corresponding breakthrough, but not for reasons of stability should be open towards the edge.
  • the longitudinal element can be carried out or on the other hand the adjustment device or an adjustment screw.
  • the longitudinal element is at least partially advantageous as a rod executed, especially completely as a rod. He's with you Temperature sensor, the various heating areas a heater covered, possible, each a heating area with a bar area or separate bar assign coordinated properties. The bars are then arranged one after the other in the tube so that their individual dimensions become an overall dimension can add.
  • the longitudinal element is particularly preferred but designed as a one-piece rod.
  • the longitudinal element has a lower coefficient of expansion on as the pipe, as material, e.g. Ceramics or Glass on.
  • the at least one Actuating part essentially embrace the rod, preferably rest in the end area.
  • a guide for the rod especially for Securing the rod against unintentional movement across Operating direction.
  • a positive connection between Actuating part in a plane transverse to the direction of actuation can cause unwanted movement of the parts against each other prevent.
  • a guide can be at least as inflection an actuating part towards the rod. The inflection is preferably with one Outside diameter of the rod corresponding recess provided in or along which the rod runs.
  • a Guiding through an adjusting screw can be more extensive than the rod tubular section, for example as a bore be formed in the end face of the adjusting screw.
  • a so-called overpressure protection of the switch can thereby be realized that the operating part in the operating direction has a certain elasticity. This can be done by achieved at least one S-shaped or Z-shaped bend are, preferably as a bend in the manner of a spring knee, which combined with a guide described above can be.
  • the leaf spring is preferably in the base in a receiving chamber stored, which in particular essentially opposed the direction of actuation for the Has leaf spring.
  • the receiving chamber can the contact areas in the direction of deflection of the leaf spring expand.
  • the leaf spring is preferably in continuous Base walls that serve as investment areas and limit enlargement.
  • the extension in is preferred approximately symmetrical, in particular symmetrical to one along the Actuating level.
  • the material for the base is suitable due to heat, Strength and insulation reasons especially ceramic material, for example steatite.
  • the base can do that Form housing for the switching device and all walls and have supports, whereby it is only by a simple, essentially flat lid is to be covered.
  • Fig. 1 shows a switching device 11 according to the invention has a base 12 which contains all components or carries.
  • the base 12 can on not shown Way, for example by means of twist tabs and Intervention cams on a tin plate edge shown in dashed lines 13 one containing a radiant heater Tin plates are attached.
  • a stick-shaped protrudes Temperature sensor 15 at least partially in a known manner over the radiator, preferably over most of it.
  • the temperature sensor 15 consists of an outer tube 16 and a rod 17 running therein.
  • the embodiment is the rod 17 made of ceramic material and the outer tube 16 made of a metal with much higher Expansion coefficient.
  • the upper end of the outer tube 16 has a transversely projecting collar 18 with which it is fixed is connected and in the lateral receiving slots 19th engages to fix the tube 16.
  • the rod 17 is in the example shown a piece over the collar 18 of the Tube 16 over.
  • the tube 16 is closed, the rod 17th is either firmly clamped to the pipe end or is attached.
  • a snap switch 22 which has a free end 23 on one Switch carrier 24 is attached. With one between two Spring legs 26 centrally running spring clip 27, the is supported on a bearing 28 of the switch carrier 24 the snap effect of the snap switch described below 22 scored. At its other free end it carries Snap switch 22 an upward switching contact head 30, which is opposite a mating contact head 32, which is attached to a plug connection lug 37.
  • the switch carrier 24 is attached both by engagement of the the free end 23 of the snap switch 22 carrying area in a suitable recess of the base 12 and through the Course of a connecting tab 31 through an implementation in the base 12.
  • the connecting tab 31 is used together with a second connecting tab 40 and a second connected thereto Plug-in tab 43 for electrical contacting a heating, not shown, via the connecting lugs.
  • the Switch 22 interrupts the connection between the plug connector lug 37 nd connecting strap 31, Fig. 1 shows the interrupted state.
  • Both the switch carrier 24 and the snap switch 22 have an overlapping breakthrough that in Extension of the rod 17 lies. On both sides of this Breakthrough has the snap switch 22 two by bending manufactured bumps 29 on.
  • the room in which the snap switch 22 sits is in the outside to in a receiving chamber 33 for a leaf spring 34 as Spring element over.
  • An extension closes to the outside 35 to the receiving chamber 33 into which the leaf spring 34 is bent.
  • the extension is approximately triangular formed, symmetrical to the longitudinal axis of the rod 17th and opens into an opening 36.
  • An adjusting screw 38 is in the center of the leaf spring 34 stored, preferably by a mounted in the leaf spring 34 Thread.
  • the upper end of the adjusting screw 38 is through the opening 36 even when the base 12 is closed Adjustment of the switching device 11 accessible.
  • the screw tip 39 abuts the rod end 21, being rounded or is spherical.
  • the screw tip 39 with a tubular section as a guide Bar end 21 overlap a certain distance to slip off to avoid.
  • a tip or a mandrel is also possible the screw tip 39, which in a recess on the front side engage the rod end 21 and the same effect demonstrate.
  • the leaf spring has on both sides of the adjusting screw 38 34 an outgoing, angled down leg 41 as Actuator on.
  • the legs 41 lie with their lower edge 42 in the switching state shown on the switching heads 29 of the snap switch 22.
  • the switching device shown in Fig. 1 works in essential as follows:
  • the adjusting screw is pressed by the tensioned leaf spring 34 38 the rod 17 against the end of the outer tube 16.
  • the state of the heating is the deflection of the leaf spring 34 such that the legs 41 and the lower edge 42 a good one Piece above the snap switch 22 or the switch block 29 lie.
  • the snap switch 22 is at its free end 23 attached to the switch carrier 24 such that the spring legs 26 above the system of the spring clip 27 on the Bearing 28 run and the switch contact head 30 on the Mating contact head 32 abuts.
  • the heater If the heater is now put into operation, it develops Heat through which the outer tube 16 is much stronger expands as the rod 17. This means that the rod end 21 to move away from the leaf spring 34 on the collar 18. This allows the leaf spring 34 to relax and down the legs 41 move towards the snap switch 22.
  • At a certain adjustable temperature with a corresponding expansion of the outer tube 16 can by Turn the adjusting screw 38 to set the point exactly be on which the leg 41 by abutment on the switch blocks 29 the spring legs 26 under the contact of the spring clip 27 pressed on the bearing 28. Since this is the Is the switching point or snap point of the snap switch 22, the spring clip 27 abruptly presses the end with the switch contact head 30 away from the mating contact head 32 downwards. The switch is therefore at an adjustable temperature been triggered.
  • An application example is an overtemperature protection for radiant heating under a glass ceramic hob, which, for example, at a temperature of should start at approx. 650 ° C.
  • the power supply to the heater is interrupted and the risk of overheating the glass ceramic avoided.
  • the subsequent cooling of the outer tube 16 pulls it back together, pushes the rod 17 up, which again the leaf spring 34 and thus the leg 41 after moved away from the switch holes 29 above and a new one Closing the switch 22 causes.
  • FIG. 2 An embodiment variant of the legs 41 of the leaf spring 34 is shown in Fig. 2. That of the essentially elongated rectangular leaf spring 34 outgoing Legs 41 have a bend 44 in their course, which is designed like a spring knee. Behind the Bend 44 the legs 41 diverge again, but with a smaller distance from each other than before the inflection 44. Bends 44 are especially in such designs advantageous in which the rod 17 between the Leg 41 is enough.
  • the rod arcuate recess 46 On the inner edge 45 of the bend 44 is one in the direction of the rod arcuate recess 46 attached in which the Rod 16 runs out.
  • Recesses 46 so deep that the inner edges 45 of the Bend 44 to each other to about half the rod diameter approach. This is a wrap that is considered sufficient of the rod 16 possible, the rod in the transverse direction secures against movement relative to the legs 41.
  • the Recesses 46 can with a certain force on the Rod 17 abut, since a relative movement between the rod and Legs only occur during the adjustment process.
  • spring-loaded bends 44 Another advantage of the spring-loaded bends 44 is that there is a certain spring action between the Adjusting screw 38 or rigid with it in the direction of the rod connected upper part of the legs 41 and the lower sections the leg 41 or the lower edges 42 possible is. This can overpress the snap switch 22 avoid or at least partially reduce. However, in order to The suspension should not guarantee precise switching be too soft.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Resistance Heating (AREA)
  • Thermally Actuated Switches (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (12)

  1. Dispositif de commutation pour appareil de chauffage électrique avec une sonde de température (15) en forme de tige pour l'essentiel, constituée d'un tube (16) et d'un élément longitudinal (17) s'étendant à l'intérieur de celui-ci, le tube (16) et l'élément longitudinal (17) présentant des coefficients de dilatation thermique différents, et avec au moins un interrupteur (22) placé dans un socle (12) et actionné par la sonde de température (15), avec un ressort de commutation (26), en particulier un ressort à déclic, la sonde de température (15) déclenchant l'interrupteur (22) par l'intermédiaire d'un dispositif de commande distinct du ressort de commutation (26) et qui présente au moins une pièce de commande (41) soumise à une contrainte par un élément élastique (34), au moins une pièce de commande (41) formant une seule pièce avec l'élément élastique (34),
    caractérisé en ce que l'élément élastique (34) et qu'au moins une pièce de commande (41) et/ou le dispositif de commande sont façonnés à partir d'un seul morceau de matériau.
  2. Dispositif de commutation selon la revendication 1, caractérisé par une dispositif de commande qui s'appuie sur le socle (12) à la manière d'un ressort à lame, en particulier avec ses deux extrémités, et dans lequel s'engage l'élément longitudinal (17), ce dispositif présentant de préférence au moins une pièce de commande (41) destinée à s'appuyer sur l'interrupteur (22).
  3. Dispositif de commutation selon la revendication 1 ou 2, caractérisé en ce que l'élément élastique (34) est formé comme ressort de pression.
  4. Dispositif de commutation selon l'une des revendications précédentes, caractérisé en ce que l'élément élastique est un ressort à lame (34) maintenu de préférence par ses deux extrémités dans le socle (12), s'étendant de préférence transversalement pour l'essentiel au sens de dilatation de la sonde de température (15), sachant que de préférence la sonde de température (15) s'engage et/ou trouve appui approximativement dans le centre du ressort à lame, et qu'au moins une pièce de commande (41) est placée approximativement au centre du ressort à lame (34).
  5. Dispositif de commutation selon l'une des revendications précédentes, caractérisé en ce qu'au moins une pièce de commande présente deux branches (41) s'écartant de l'élément élastique (34) et destinées à s'appuyer sur l'interrupteur (22), la pièce de commande (41) ayant en particulier la forme d'un U.
  6. Dispositif de commutation selon l'une des revendications précédentes, caractérisé en ce qu'un dispositif de réglage (38) est une liaison mécanique entre la sonde de température (45) et le dispositif de commande, s'engageant de préférence dans la sonde de température (15), en particulier dans l'élément longitudinal (17).
  7. Dispositif de commutation selon la revendication 6, caractérisé en ce que le dispositif de réglage (38) est logé dans le dispositif de commande, et y est notamment fixé.
  8. Dispositif de commutation selon la revendication 6 ou 7, caractérisé en ce que l'élément élastique (34) présente un logement pour le dispositif de réglage, en particulier un filet (48) pour une vis de réglage (38), la vis de réglage (38) s'étendant de préférence en direction de l'élément longitudinal (17) et/ou dans le sens d'actionnement de l'interrupteur (22).
  9. Dispositif de commutation selon l'une des revendications précédentes, caractérisé en ce que l'élément longitudinal est une tige (17), sachant qu'au moins une pièce de commande (41) entoure pour l'essentiel la tige (17), s'appuie de préférence sur l'extérieur de la zone terminale de la tige (17) et forme un guide (46) pour la tige (17), en particulier pour assurer la tige (17) contre un déplacement transversal par rapport au sens d'actionnement.
  10. Dispositif de commutation selon la revendication 9, caractérisé en ce que le guide est un coude (44) d'au moins une pièce de commande orienté vers la tige (17), le coude (44) présentant de préférence un évidement (46) correspondant au diamètre extérieur de la tige (17), avec lequel il s'appuie sur la tige (17).
  11. Dispositif de commutation selon l'une des revendications précédentes, caractérisé en ce qu'au moins une pièce de commande (41) présente une élasticité dans le sens d'actionnement, en particulier au moins une pliure, de préférence sous forme de coude (44) à la manière d'un coude élastique.
  12. Dispositif de commutation selon la revendication 4, caractérisé en ce que le ressort à lame (34) est logé sur le socle (12) dans un logement (33) avec des zones d'appui orientées notamment pour l'essentiel dans le sens d'actionnement, et en ce que le logement (33) s'élargit à partir des zones d'appui dans la direction de la flexion du ressort à lame (34), l'élargissement étant en particulier formé de manière approximativement symétrique.
EP99119587A 1998-10-09 1999-10-02 Dispositif de commutation pour appareil de chauffage électrique Expired - Lifetime EP0993015B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19846513 1998-10-09
DE19846513A DE19846513A1 (de) 1998-10-09 1998-10-09 Schalteinrichtung für eine elektrische Heizeinrichtung

Publications (3)

Publication Number Publication Date
EP0993015A2 EP0993015A2 (fr) 2000-04-12
EP0993015A3 EP0993015A3 (fr) 2001-03-28
EP0993015B1 true EP0993015B1 (fr) 2004-05-06

Family

ID=7883904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99119587A Expired - Lifetime EP0993015B1 (fr) 1998-10-09 1999-10-02 Dispositif de commutation pour appareil de chauffage électrique

Country Status (5)

Country Link
US (1) US6304165B1 (fr)
EP (1) EP0993015B1 (fr)
AT (1) ATE266253T1 (fr)
DE (2) DE19846513A1 (fr)
ES (1) ES2219975T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT409680B (de) * 2001-04-17 2002-10-25 Electrovac Temperaturbegrenzer
AT412521B (de) 2003-03-10 2005-03-25 Electrovac Temperaturfühler
EP1569257B1 (fr) * 2004-02-24 2006-07-12 Electrovac, Fabrikation elektrotechnischer Spezialartikel Gesellschaft m.b.H. Capteur de température
DE102005031069A1 (de) * 2005-06-24 2007-01-11 E.G.O. Elektro-Gerätebau GmbH Elektromechanische Temperaturerfassung für ein Kochgerät und Verfahren zur Herstellung einer elektromechanischen Temperaturerfassung für ein Kochgerät
DE102005057105A1 (de) * 2005-11-25 2007-05-31 E.G.O. Elektro-Gerätebau GmbH Temperaturerfassungseinrichtung für eine Heizeinrichtung sowie ein Verfahren zur Ansteuerung einer Heizeinrichtung
DE102006057260A1 (de) * 2006-11-22 2008-05-29 E.G.O. Elektro-Gerätebau GmbH Schalteinrichtung für eine Heizeinrichtung
GB0717051D0 (en) * 2007-09-01 2007-10-17 Ceramaspeed Ltd Temperature sensor
DE102009038960A1 (de) * 2009-08-19 2011-02-24 E.G.O. Elektro-Gerätebau GmbH Temperaturfühler und Verfahren zur Justierung eines solchen Temperaturfühlers
KR101596938B1 (ko) 2014-07-29 2016-02-23 (주)에코에너지 기술연구소 전기 쿡탑용 온도조절 장치
DE102018213625A1 (de) * 2018-08-13 2020-02-13 Siemens Aktiengesellschaft Schaltanlagentemperaturmessung

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US3235691A (en) * 1963-08-13 1966-02-15 Honeywell Inc Temperature responsive slip friction switch
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DE2839161A1 (de) * 1978-09-08 1980-03-20 Ego Regeltech Temperaturbegrenzer fuer eine glaskeramik-kocheinheit
US4400679A (en) * 1981-09-21 1983-08-23 Therm-O-Disc, Incorporated Snap acting switch for thermostats
AT376540B (de) * 1983-01-05 1984-11-26 Electrovac Vorrichtung zur regelung bzw. begrenzung wenigstens eines temperaturwertes bzw. eines temperaturbereiches von strahlungs- bzw. kontaktheizkoerpern von elektrischen kochgeraeten
AT382708B (de) * 1983-07-07 1987-04-10 Electrovac Vorrichtung zur regelung bzw. begrenzung wenigstens eines temperaturwertes bzw. eines temperaturbereiches von strahlungs- bzw. kontaktheizkoerpern
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DE3410442A1 (de) * 1983-09-17 1985-09-26 Ego Elektro Blanc & Fischer Temperaturfuehler, insbesondere fuer einen temperaturbegrenzer fuer eine glaskeramik-kocheinheit
DE3540414A1 (de) * 1985-11-14 1987-05-21 Ego Elektro Blanc & Fischer Temperaturbegrenzer
DE3705260A1 (de) * 1987-02-19 1988-09-01 Ego Elektro Blanc & Fischer Temperaturbegrenzer
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GB2263770B (en) * 1992-01-23 1994-11-02 Ceramaspeed Ltd Device for controlling or limiting temperature in an electric cooking appliance
AT401114B (de) * 1993-12-03 1996-06-25 Electrovac Temperaturregler

Also Published As

Publication number Publication date
US6304165B1 (en) 2001-10-16
ATE266253T1 (de) 2004-05-15
ES2219975T3 (es) 2004-12-01
EP0993015A2 (fr) 2000-04-12
EP0993015A3 (fr) 2001-03-28
DE19846513A1 (de) 2000-04-13
DE59909386D1 (de) 2004-06-09

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