EP1569257A1 - Capteur de température - Google Patents

Capteur de température Download PDF

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Publication number
EP1569257A1
EP1569257A1 EP04004151A EP04004151A EP1569257A1 EP 1569257 A1 EP1569257 A1 EP 1569257A1 EP 04004151 A EP04004151 A EP 04004151A EP 04004151 A EP04004151 A EP 04004151A EP 1569257 A1 EP1569257 A1 EP 1569257A1
Authority
EP
European Patent Office
Prior art keywords
spring
rod
contact
support
contact spring
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
EP04004151A
Other languages
German (de)
English (en)
Other versions
EP1569257B1 (fr
Inventor
Paul Dr. Losbichler
Christian Dipl.- Ing Auradnik
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.)
Electrovac AG
Original Assignee
Electrovac AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34745869&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1569257(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Electrovac AG filed Critical Electrovac AG
Priority to AT04004151T priority Critical patent/ATE333141T1/de
Priority to DE502004000953T priority patent/DE502004000953D1/de
Priority to EP04004151A priority patent/EP1569257B1/fr
Priority to US11/065,328 priority patent/US7345572B2/en
Publication of EP1569257A1 publication Critical patent/EP1569257A1/fr
Application granted granted Critical
Publication of EP1569257B1 publication Critical patent/EP1569257B1/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
    • H01H37/20—Means for adjustment of "on" or "off" operating temperature by varying the position of the thermal element in relation to switch base or casing

Definitions

  • the invention relates to a Temperaturfiihler for a radiant heater, which Temperature sensor an expansion element connected to a housing of a switch, e.g. a tube connected to another expansion element, e.g. a staff, in the area of his free end is firmly connected, wherein the two expansion elements different Have thermal expansion coefficient, and the switch at least one against a Site biased and a contact bearing formed as a snap spring contact spring and one of the expansion elements acting from one in the axial direction Spring is acted upon.
  • a Switch e.g. a tube connected to another expansion element, e.g. a staff
  • Such temperature sensors are widely used where e.g. electrically or with gas heated appliances, such as cooking plates, radiant heaters of glass ceramic cooking units, Oven muffles or the like to be protected from overheating.
  • gas heated appliances such as cooking plates, radiant heaters of glass ceramic cooking units, Oven muffles or the like to be protected from overheating.
  • EP 279 368 describes a prior art Temperature sensor system. It is usually an outer sensor tube with higher Thermal expansion coefficient with a rod arranged in this, at the free End of the tube connected to this and axially displaceable in the sensor tube and a having lower coefficients of thermal expansion arranged. It corresponds to the active section of the temperature sensor of the length over which the tube and the inner rod are arranged one inside the other. The different thermal expansions of these two parts lead to a differential length when the temperature sensor is heated Contact system is used. For such temperature sensors is by positioning and
  • the contact spring In a known such temperature sensor is at a temperature the sensor rod system in a radiant heater, the contact spring indirectly with a Pusher controlled by the staff.
  • the contact spring is fixed in the prior art with the spring bearing connected e.g. with the help of welding or riveting.
  • the contact spring is as Snap spring formed.
  • the indirect contact systems are the Main thermal contact springs self-closing, i. the contact system is closed when the indirectly acting plunger does not touch the contact spring.
  • the bias in the contact spring In the adjusted initial state, i.e. when cold, the bias in the contact spring is a minimum. With rising temperature acts on the plunger with a certain operating force on the Contact spring, which is preferably wave-shaped in the transmission region.
  • AT 386 673 discloses a temperature limiter disposed between a gas burner body and one of them heated glass ceramic cooking surface is arranged, wherein the tube of the Temperature sensor is enclosed by a surrounding surrounding cladding tube.
  • a snap spring attached with an additional movable spring arm, which carries at its end a contact piece, the mechanical contact between Ceramic rod and the actuation point of the snap spring ensures.
  • the system is up limited to a single-loop controller.
  • the conventional temperature control systems are designed for heaters with 1200 W to 2300 W peak power.
  • the contact spring is up to the load limit and beyond even if repeated or cyclic stresses apply even then irreversible material changes, if the mechanical stresses in the Contact spring lie below the yield point.
  • These phenomena are called fatigue designated.
  • the fatigue phenomena are essentially of the state of tension of the Material as well as the thermal stress.
  • the aim of the invention is to overcome these disadvantages and problems mentioned above avoid and suggest a temperature sensor, in which a rapid fatigue of the Contact spring and an additional, the axial movement of the inner rod in the sensor tube enabling spring element is avoided.
  • the optimized mechanical and / or thermal transmission in the contact spring become.
  • the proposed measures ensure that the contact spring between is clamped the rod and the acted upon by the spring bearing.
  • the contact spring is at a corresponding increase in the temperature through which the support applied spring in its open position. It is therefore possible, the contact spring in the cold state of the Temperaturfiihlers elastic bias, with increasing Temperature decreases the mechanical stress in the contact spring. It arise at same temperature or current load, compared with the known solution of indirect snap mechanism, a significantly lower voltage load of Contact spring, since just the supporting spring on the support tasks, which at the known solution must take over the contact spring itself. This affects in terms of on the material fatigue positive.
  • Another advantage of the support is a cooling effect away from the contact spring Heat conduction processes. Due to the position of the supporting compression spring on the Heat input of the sensor tube and inner rod facing away from the contact spring, is due to the heat dissipation of the heat introduced into the compression spring in the direction Regulator housing and consequently regulator environment, the temperature load of the spring material so far reduces that material's fatigue of this extra Spring element can be avoided and the stability of the switching point position of the contact spring is ensured by the constant supportive effect of the compression spring. Thereby The contact spring can also be higher, in terms of temperature and electrical Strain, be claimed.
  • the support also allows easy production of two- or Multi-contact thermostats, such as for a hot indication, involving a pestle as a transfer member, which is arranged as an extension of the rod coaxial therewith. With Such a trained additional transfer member is exactly every little axial extent transferred directly to a second contact system.
  • acting against the rod Spring is supported on a housing-fixed abutment and a spring plate on the Support acts.
  • the spring force is particularly good To be defined.
  • the plunger to which the spring directly supported made of metal and the support made of ceramic.
  • the force acting against the rod spring at one with the housing releasably secured spring plate variant is supported and on the spring plate the support acts.
  • This is preferably made of a metallic material Federtellertine has significant montageetechnische and processing advantages and increases by direct heat conduction from the spring in the spring plate of the Heat dissipation serving metallic surface, whereby the temperature loads on the Contact spring and the spring are further reduced.
  • the support and / or the plunger of electric non-conductive material, in particular ceramic, is or are. So can between the contact systems are avoided electrical connection and thus the Safety be increased.
  • the contact spring is a line support wherein the contact spring in the portion between the sensor rod and the Support preferably double-wave or as a perforated shaft with Wellenbug is executed.
  • the axial distance from bar to support can be set exactly.
  • the contact spring has a point support, wherein the contact spring in the portion between the sensor rod and support preferably having impressed pressure points or a pressed-in ball.
  • the contact ball may e.g. be formed of stainless or hardened metal or ceramic.
  • a radiant heater 1 has a trough 2, in which a spirally placed Heating coil 3 is embedded in an embedding mass 4 (see FIGS. 1 and 2).
  • the Radiant heater 1 is below a plate 5 made of metal, glass ceramic or the like. arranged, which forms a cooking surface 6. Between the cooking surface 6 and the heating coil. 3 a temperature sensor 7 is arranged, which is in communication with a switching head 18, wherein the Temperaturfiihler 7 in a simple manner through holes in the housing of the Radiant heater 1 is passed.
  • the Temperaturfiihler 7 is thus exposed to the temperature below the cooking surface. 6 prevails in the radiation space between the cooking surface 6 and the heating coil 3 and can to capture this temperature.
  • the first Expansion element 8 as a tube, in particular with a circular cross-section
  • the second Expansion element formed as a rod 9, which preferably has a circular cross-section has, and is arranged in the interior of the tube 8 fitting.
  • the first expansion element will be a tube 8 and the second expansion element referred to as a rod 9, the tube 8 a larger thermal expansion coefficient than the rod 9.
  • the tube 8 from Metal with a higher coefficient of thermal expansion and the rod 9 made of ceramic, glass or a metal having a smaller thermal expansion coefficient.
  • an adjusting cap 110 is provided at the free end of the rod 9, which in Direction of the actuating movement of the temperature sensor is initially slidably mounted.
  • this Fixation e.g. Can be done by laser welding or gluing.
  • the final Fixation of the adjustment cap 110 can improve the accuracy and reproducibility of the Adjustment position can be checked by moving the adjusting cap 110 several times by the respective switching points are measured and compared with each other. Through this Displacement or snap action of the contact spring 11 is also ensured that the spring tongue 15 is optimally inserted in the spring bearing notch.
  • One end 101 of the tube 8 is held in a housing 10 of a switching head 18, the tube 8 having a flange 102, which bears against the inside of the housing 10, is provided.
  • the switching head 18, or its housing 10 are terminals 13, 13 ', 131, 131' arranged, wherein at the terminals 13, 13 'in the interior of the housing 10 contact springs 11, 11 'are electrically conductively fixed, e.g. riveted with these.
  • These contact springs 11, 11 ' are formed as snap springs and carry contacts 14, 14'.
  • terminals 131, 131 'carry fixed contacts 16, 16' connected to the movable contacts 14, 14 'of the contact springs 11, 11' cooperate.
  • a fixed housing abutment 17th arranged on which a spring 19 is supported.
  • This spring 19 acts via a spring plate 20 on a support 21 a. In this case, the contact spring 11 between the rod 9 and the Support 21 clamped.
  • the support 21 is also hat-shaped and takes the plunger 22 in one of the Contact spring 11 and thus also away from the rod 9 recess.
  • This plunger 22 is firmly connected to the flange 23 having a sleeve. In this case, the sleeve 23 prevail and the plunger 22, the contact spring 11 'and the terminal 13'.
  • the plunger 22 is surrounded by an adjusting spring 24, which is located on the flange of the sleeve 23rd and the spring plate 20 is supported.
  • the contact spring 11 between the rod 9 and the support 21 By the adjustment process, the contact spring 11 between the rod 9 and the support 21, the position corresponding to the cold condition of the Temperaturfiihlers, biased. With rising temperature moves the plunger and thus the contact spring to the outside, the mechanical stress on the contact spring 11 decreases. At the same time, by the Spring 19 ensures that the support 21 is pressed against the contact spring 11 and so that a heat conduction from the contact spring 11 takes place away.
  • a critical point for the switching point accuracy represents the mechanical Transmission of the rod 9 on the contact spring 11 and the support 21 is. In general this is achieved by the wave-shaped design of the contact spring 11. This will be a Line or point support between rod 9 and contact spring 11 and contact spring 11 and Support 21 and thus achieved a high switching point accuracy, the point support even with tilting of the rod 9 causes no negative effect on the adjustment. Since the contact spring 11 between the prestressed by the spring 19 supports 21 and the Rod 9 is clamped, the transmission must be above and below the contact spring occur. Special versions of this are shown in Figures 6 to 9. A Point support can be achieved by a pressed ball 28 or by pressure points 27 become.
  • Line-shaped transmission can by a double waveform of the contact spring 11th (see Fig. 8a, b) or training as a broken shaft (see Fig. 7 a to c) reached be in the latter case, in addition, a matching metal rod 26 may be introduced can, which protects the area of the Wellenbugs (29) from deformation.
  • the Functions of the plunger 22 and the support 21 a single piece of ceramic or metal to use.
  • the second contact spring is usually only used to control a signaling device, also called hot display, e.g. a signal lamp to indicate that the Radiant heater 1 and the cooking surface 6 a temperature of e.g. Exceeds 65 ° C.
  • a signaling device also called hot display, e.g. a signal lamp to indicate that the Radiant heater 1 and the cooking surface 6 a temperature of e.g. Exceeds 65 ° C.
EP04004151A 2004-02-24 2004-02-24 Capteur de température Expired - Lifetime EP1569257B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT04004151T ATE333141T1 (de) 2004-02-24 2004-02-24 Temperaturfühler
DE502004000953T DE502004000953D1 (de) 2004-02-24 2004-02-24 Temperaturfühler
EP04004151A EP1569257B1 (fr) 2004-02-24 2004-02-24 Capteur de température
US11/065,328 US7345572B2 (en) 2004-02-24 2005-02-24 Temperature sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04004151A EP1569257B1 (fr) 2004-02-24 2004-02-24 Capteur de température

Publications (2)

Publication Number Publication Date
EP1569257A1 true EP1569257A1 (fr) 2005-08-31
EP1569257B1 EP1569257B1 (fr) 2006-07-12

Family

ID=34745869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04004151A Expired - Lifetime EP1569257B1 (fr) 2004-02-24 2004-02-24 Capteur de température

Country Status (4)

Country Link
US (1) US7345572B2 (fr)
EP (1) EP1569257B1 (fr)
AT (1) ATE333141T1 (fr)
DE (1) DE502004000953D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006037712A1 (de) * 2006-08-08 2008-02-14 E.G.O. Elektro-Gerätebau GmbH Schalteinrichtung für eine Heizeinrichtung
EP2287877A2 (fr) 2009-08-19 2011-02-23 E.G.O. ELEKTRO-GERÄTEBAU GmbH Capteur de température et procédé d'ajustement d'un tel capteur de température
DE102010008755A1 (de) 2010-02-17 2011-08-18 E.G.O. Elektro-Gerätebau GmbH, 75038 Verfahren und Vorrichtung zum Ausschalten eines Schalters
EP3116286A4 (fr) * 2015-05-15 2017-04-19 Shenzhen Foda Electric Co., Ltd. Plaque chauffante à régulation de température, isolée thermiquement
DE102020201610B3 (de) * 2020-02-10 2021-05-12 E.G.O. Elektro-Gerätebau GmbH Verfahren zur Ansteuerung einer Heizeinrichtung eines Kochfelds und Kochfeld

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008093051A1 (fr) * 2007-01-30 2008-08-07 Ceramaspeed Limited Détecteur de température pour chauffages électriques rayonnant
WO2008093052A1 (fr) * 2007-01-30 2008-08-07 Ceramaspeed Limited Capteur de température
GB0702738D0 (en) * 2007-02-13 2007-03-21 Ceramaspeed Ltd Temperature sensor
GB0717051D0 (en) * 2007-09-01 2007-10-17 Ceramaspeed Ltd Temperature sensor
DE102009022332A1 (de) 2009-05-13 2011-01-05 E.G.O. Elektro-Gerätebau GmbH Induktionsheizeinrichtung
DE102013111202A1 (de) * 2013-10-10 2015-04-16 Werner Reiter Temperaturregler
CN104134579A (zh) * 2014-07-28 2014-11-05 常州常胜精密电子有限公司 多开关温度保护器
DE102018213625A1 (de) * 2018-08-13 2020-02-13 Siemens Aktiengesellschaft Schaltanlagentemperaturmessung
US11570853B2 (en) 2021-02-01 2023-01-31 E.G.O. Elektro-Geraetebau Gmbh Method for actuating a heating device of a hob, and hob
CN116501102B (zh) * 2023-04-26 2023-09-29 绍兴中新电器有限公司 一种简易液胀式温控器

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3004123A (en) * 1960-04-28 1961-10-10 Kenneth B Cannon Thermally responsive actuator
EP0279368A2 (fr) * 1987-02-19 1988-08-24 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Limiteur de température
EP0901310A2 (fr) * 1997-09-03 1999-03-10 Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H. Dispositif pour afficher un état de chauffe
US6304165B1 (en) * 1998-10-09 2001-10-16 E.G.O. Elektro-Geratebau Gmbh Switching device for an electric heating device

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DE7826549U1 (de) 1978-09-07 1978-12-14 E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen Temperaturbegrenzer fuer gasbeheizte glaskeramik-kochflaechen
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AT386714B (de) * 1983-07-07 1988-10-10 Electrovac Vorrichtung zur heissanzeige und zur regelung bzw. begrenzung der temperatur von strahlungsbzw. kontaktheizkoerpern von elektrischen kochgeraeten
DE3508585A1 (de) 1984-03-16 1985-09-19 Emerson Electric Co., St. Louis, Mo. Doppeltemperaturthermostat
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AT401114B (de) * 1993-12-03 1996-06-25 Electrovac Temperaturregler
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AT405566B (de) * 1996-07-30 1999-09-27 Electrovac Temperaturbegrenzer mit zündelement
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DE19824871A1 (de) 1998-06-04 1999-12-09 Ego Elektro Geraetebau Gmbh Temperaturschalter, insbesondere einstellbarer Temperaturregler
DE50112906D1 (de) * 2001-01-10 2007-10-04 Electrovac Temperaturbegrenzer
AT409680B (de) * 2001-04-17 2002-10-25 Electrovac Temperaturbegrenzer
AT412521B (de) * 2003-03-10 2005-03-25 Electrovac Temperaturfühler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004123A (en) * 1960-04-28 1961-10-10 Kenneth B Cannon Thermally responsive actuator
EP0279368A2 (fr) * 1987-02-19 1988-08-24 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Limiteur de température
EP0901310A2 (fr) * 1997-09-03 1999-03-10 Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H. Dispositif pour afficher un état de chauffe
US6304165B1 (en) * 1998-10-09 2001-10-16 E.G.O. Elektro-Geratebau Gmbh Switching device for an electric heating device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006037712A1 (de) * 2006-08-08 2008-02-14 E.G.O. Elektro-Gerätebau GmbH Schalteinrichtung für eine Heizeinrichtung
EP2287877A2 (fr) 2009-08-19 2011-02-23 E.G.O. ELEKTRO-GERÄTEBAU GmbH Capteur de température et procédé d'ajustement d'un tel capteur de température
DE102009038960A1 (de) 2009-08-19 2011-02-24 E.G.O. Elektro-Gerätebau GmbH Temperaturfühler und Verfahren zur Justierung eines solchen Temperaturfühlers
EP2287877A3 (fr) * 2009-08-19 2012-02-22 E.G.O. ELEKTRO-GERÄTEBAU GmbH Capteur de température et procédé d'ajustement d'un tel capteur de température
EP2544205A1 (fr) 2009-08-19 2013-01-09 E.G.O. ELEKTRO-GERÄTEBAU GmbH Capteur de température et procédé d'ajustement d'un tel capteur de température
US8368503B2 (en) 2009-08-19 2013-02-05 E.G.O. Elektro-Geraetebau Gmbh Temperature sensor and method for adjusting such a temperature sensor
DE102010008755A1 (de) 2010-02-17 2011-08-18 E.G.O. Elektro-Gerätebau GmbH, 75038 Verfahren und Vorrichtung zum Ausschalten eines Schalters
WO2011101193A1 (fr) 2010-02-17 2011-08-25 E.G.O. Elektro-Gerätebau GmbH Procédé et dispositif pour déclencher un commutateur
EP3116286A4 (fr) * 2015-05-15 2017-04-19 Shenzhen Foda Electric Co., Ltd. Plaque chauffante à régulation de température, isolée thermiquement
DE102020201610B3 (de) * 2020-02-10 2021-05-12 E.G.O. Elektro-Gerätebau GmbH Verfahren zur Ansteuerung einer Heizeinrichtung eines Kochfelds und Kochfeld
EP3863372A1 (fr) 2020-02-10 2021-08-11 E.G.O. Elektro-Gerätebau GmbH Procédé de commande d'un dispositif chauffant d'une plaque de cuisson et plaque de cuisson

Also Published As

Publication number Publication date
EP1569257B1 (fr) 2006-07-12
DE502004000953D1 (de) 2006-08-24
US7345572B2 (en) 2008-03-18
US20050184849A1 (en) 2005-08-25
ATE333141T1 (de) 2006-08-15

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