EP0993015A2 - Dispositif de commutation pour appareil de chauffage élèctrique - Google Patents

Dispositif de commutation pour appareil de chauffage élèctrique Download PDF

Info

Publication number: EP0993015A2
Authority: EP; European Patent Office
Prior art keywords: spring; switching device; rod; switch; actuating part
Prior art date: 1998-10-09
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

EP99119587A

Other languages

German (de)

English (en)

Other versions

EP0993015A3 (fr

EP0993015B1 (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.)

1998-10-09

Filing date

1999-10-02

Publication date

2000-04-12

1999-10-02 Application filed by EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH

2000-04-12 Publication of EP0993015A2 publication Critical patent/EP0993015A2/fr

2001-03-28 Publication of EP0993015A3 publication Critical patent/EP0993015A3/fr

2004-05-06 Application granted granted Critical

2004-05-06 Publication of EP0993015B1 publication Critical patent/EP0993015B1/fr

2019-10-02 Anticipated expiration legal-status Critical

Status 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 for a electric heating device with an essentially rod-shaped Temperature sensor consisting of a tube and a it consists of a longitudinal element, with tube and Longitudinal element different thermal expansion coefficients have, and with at least one of the Actuated temperature sensors, arranged in a base Switch with a switch spring, in particular a snap spring, where the temperature sensor switches over one of the switching spring triggers separate actuating device, wherein the actuating device has at least one actuating part has that in or against the direction of actuation is loaded by a spring element.
a switching device of the aforementioned type is for example known from DE-OS 28 39 161. This points as an actuator a lever on one side, by 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. In the Lever two actuating pins are used, each in point in 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 function.
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 are preferred and / or the actuating device from one worked out single piece of material.
a special one simple execution can be worked out from a flat material and be shaped accordingly by bending.
a Another possibility is, for example, a firm connection by gluing or welding, possibly also pressing.
the Objects in the installed state as a single part can act, the individual parts in at least one a direction other than the direction of assembly exhibit.
the spring element is preferably designed as a compression spring in order to to ensure precise work.
that is Spring element like a leaf spring.
a leaf spring is advantageous with both end areas or ends held in the base, especially due to a spring force Investment areas.
a leaf spring can essentially be advantageous transverse to the direction of expansion of the temperature sensor run, thereby avoiding unwanted shear forces or the like can be.
the temperature sensor is particularly preferably located or engages about in the middle of the leaf spring so that it is even is charged.
the actuating part advantageously runs in close to the temperature sensor, in particular it is approximately arranged in the middle of the leaf spring.
the actuating part advantageously has two of the spring element protruding legs to rest on the switch, in particular, it is approximately U-shaped.
the U-shaped Legs are preferably about 90 ° to the longitudinal extent the leaf spring twisted.
the legs 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 embodiment, 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 adjustment 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 by 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 is with one Temperature sensor, the differently heated 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 Direction of actuation.
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 can be formed 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 by 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.
a switching device 11 has a base 12 which contains all components or carries.
the base 12 can on not shown Way, for example by means of twisting tabs and Intervention cams on a tin plate edge shown in dashed lines 13 one containing a radiant heater Tin plates are attached.
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 serves 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 connection lug 37 nd connection tab 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 have 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 another 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 above all in such designs advantageous in which the rod 17 between the Leg 41 is enough.
the rod arcuate recess 46 attached in which the Rod 16 runs out.
they are 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 in relation to the legs 41.
the Recesses 46 can with a certain force on the Stick 17 because 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)
Thermally Actuated Switches (AREA)
Control Of Resistance Heating (AREA)
Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Control Of High-Frequency Heating Circuits (AREA)
Electric Stoves And Ranges (AREA)

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 true EP0993015A2 (fr)	2000-04-12
EP0993015A3 EP0993015A3 (fr)	2001-03-28
EP0993015B1 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1251540A3 (fr) *	2001-04-17	2004-09-22	Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H.	Limiteur de température
AT412521B (de) *	2003-03-10	2005-03-25	Electrovac	Temperaturfühler
WO2009027687A1 (fr) *	2007-09-01	2009-03-05	Ceramaspeed Limited	Capteur de température

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE502004000953D1 (de) *	2004-02-24	2006-08-24	Electrovac	Temperaturfühler
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
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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US2496229A (en) *	1948-05-08	1950-01-31	Control Products Inc	Thermal switch
US2559372A (en) *	1948-12-10	1951-07-03	Howard A Rike	Thermostatic switch
US2721915A (en) *	1950-09-08	1955-10-25	Motor Wheel Corp	Electric switch control
US2705747A (en) *	1954-01-28	1955-04-05	Elsa L Strange	Temperature control instruments
US3029329A (en) *	1959-07-13	1962-04-10	Therm O Disc Inc	Thermostatic controls
US3004123A (en) *	1960-04-28	1961-10-10	Kenneth B Cannon	Thermally responsive actuator
US3194927A (en) *	1962-07-31	1965-07-13	Therm O Disc Inc	Fail-safe probe-type thermo-responsive electrical switch device
US3235691A (en) *	1963-08-13	1966-02-15	Honeywell Inc	Temperature responsive slip friction switch
US3243557A (en) *	1964-03-06	1966-03-29	Stewart Warner Corp	Thermally actuated control device having ceramic tubes with central heat expandible members
GB1079884A (en) *	1964-07-31	1967-08-16	Drayton Controls Ltd	Temperature responsive switching devices
US3899765A (en) *	1974-07-31	1975-08-12	Texas Instruments Inc	Thermally actuated switch
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
GB8324271D0 (en) *	1983-09-10	1983-10-12	Micropore International Ltd	Thermal cut-out device
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
ATE118144T1 (de) *	1988-06-25	1995-02-15	Ego Elektro Blanc & Fischer	Temperaturschalter.
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

1998
- 1998-10-09 DE DE19846513A patent/DE19846513A1/de not_active Withdrawn
1999
- 1999-10-02 AT AT99119587T patent/ATE266253T1/de not_active IP Right Cessation
- 1999-10-02 ES ES99119587T patent/ES2219975T3/es not_active Expired - Lifetime
- 1999-10-02 DE DE59909386T patent/DE59909386D1/de not_active Expired - Fee Related
- 1999-10-02 EP EP99119587A patent/EP0993015B1/fr not_active Expired - Lifetime
- 1999-10-12 US US09/416,568 patent/US6304165B1/en not_active Expired - Fee Related

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1251540A3 (fr) *	2001-04-17	2004-09-22	Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H.	Limiteur de température
AT412521B (de) *	2003-03-10	2005-03-25	Electrovac	Temperaturfühler
US7119654B2 (en)	2003-03-10	2006-10-10	Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H.	Temperature sensor
WO2009027687A1 (fr) *	2007-09-01	2009-03-05	Ceramaspeed Limited	Capteur de température

Also Published As

Publication number	Publication date
DE59909386D1 (de)	2004-06-09
ES2219975T3 (es)	2004-12-01
US6304165B1 (en)	2001-10-16
ATE266253T1 (de)	2004-05-15
EP0993015A3 (fr)	2001-03-28
EP0993015B1 (fr)	2004-05-06
DE19846513A1 (de)	2000-04-13

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