WO2008017397A1 - Dispositif de commutation pour un dispositif de chauffage ainsi que dispositif de chauffage - Google Patents

Dispositif de commutation pour un dispositif de chauffage ainsi que dispositif de chauffage Download PDF

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Publication number
WO2008017397A1
WO2008017397A1 PCT/EP2007/006715 EP2007006715W WO2008017397A1 WO 2008017397 A1 WO2008017397 A1 WO 2008017397A1 EP 2007006715 W EP2007006715 W EP 2007006715W WO 2008017397 A1 WO2008017397 A1 WO 2008017397A1
Authority
WO
WIPO (PCT)
Prior art keywords
switching
switching device
switch
switches
sensor part
Prior art date
Application number
PCT/EP2007/006715
Other languages
German (de)
English (en)
Inventor
Willi Reichert
Original Assignee
E.G.O. Elektro-Gerätebau 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 E.G.O. Elektro-Gerätebau GmbH filed Critical E.G.O. Elektro-Gerätebau GmbH
Publication of WO2008017397A1 publication Critical patent/WO2008017397A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator

Definitions

  • the invention relates to a switching device according to the preamble of claim 1, as it is used for heating devices, in particular radiant heaters on hobs, as well as such a heating device with such a switching device.
  • the invention has for its object to provide a switching device mentioned above and a heater with which problems of the prior art can be avoided and in particular more functions can be effected, in particular in connection with a temperature control of the switching device or the heater.
  • This object is achieved by a switching device with the features of claim 1 and a heating device with the features of claim 16.
  • Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. The wording of the claims is incorporated herein by express reference.
  • the switching device has a thermomechanical temperature detection device with an elongated sensor for temperature detection on the heater.
  • the sensor has two elongated, at least at one point connected or nested sensor parts, which have a different thermal expansion behavior and thus perform a relative movement relative to each other along a switching path with temperature changes.
  • a switching movement is performed on one or more switches of the temperature detection device, for which purpose a plurality of switching points are provided at different points along the switching path or along the switching movement.
  • a switch or an electrical contact is arranged, which is actuated upon reaching the respective switching point, that is closed or opened.
  • the switching device has at least three switches, each with its own switching point.
  • the switching device advantageously has a housing, for example made of ceramic material. All the switches of the switching devices are arranged in this housing, so that the switching device is a well-manageable unit, since it is provided with outwardly facing electrical connections and can be easily installed and connected.
  • At least two, preferably more or all, switches are arranged one behind the other or successively in the longitudinal direction of the sensor. It is thus easy to ensure that they can each be adjusted or adjusted to a specific switching point and thus to a specific temperature. It can be provided that actuation areas or points where a switching operation is effected by pressure on it, are close to the sensor or touched by this or related parts and operated.
  • the switches used may have switching springs or be switching springs. Snap-action switches or snap springs are preferred with a contact head arranged at one end, which have an advantageous contacting behavior.
  • the senor consists of an outer sensor part with an inner sensor part, which extends or is stored substantially in the outer sensor part and is simply plugged in, for example.
  • the outer sensor part is an aforementioned metal tube and the inner sensor part is a rod made of ceramic or similar material with very low temperature-dependent expansion behavior.
  • the inner sensor part protrude into the housing of the switching device or the switching device itself. It can be provided that it actuates at least one of the switches directly, for example with a laterally projecting projection or with its end.
  • the inner sensor part is pushed out with spring load from the switching device, ie into the outer sensor part.
  • the inner sensor part can be dispensed with a fixed connection at the end of the probe and the inner sensor part only needs to be inserted or inserted into the outer sensor part.
  • Such a spring load advantageously engages the end of the inner sensor part with a support or attachment to a housing of the switching device so as to clamp the inner sensor part relative to the outer sensor part connected to the housing.
  • the inner sensor part or an extension thereof may be provided with a sleeve-like attachment part which is widened over the diameter of the inner sensor part and which is guided over the end thereof or said extension.
  • the aforementioned spring load can advantageously act on this attachment part, which may be in particular a metal sleeve with projecting collar for receiving a coil spring or the like. With relative movement of the sensor or the two sensor parts against each other due to temperature change, the aforementioned attachment moves advantageously together with the end of the inner With sensor parts. Thus, a switch can be actuated at its assigned switching point.
  • this stop is adjustable in the direction of the switching movement, for example, again by means of a guided on or in the attachment part adjusting screw.
  • this is also performed in an internal thread of the attachment as the aforementioned grub screw.
  • This stop for the third switch can protrude, for example, in the extension of the inner part of the sensor behind the attachment and act directly against a switch or a switching spring. If this adjustment screw is guided in the same internal thread of the attachment as the aforementioned grub screw, the structure can be kept simpler.
  • the inner sensor part or its extension can have at its end a sleeve-like guide, in which they are guided and thus can not deviate from the direction of the switching movement.
  • the above-described attachment runs in such a sleeve-like guide.
  • an aforementioned spring in particular as a helical spring which is mounted on the sleeve-like guide and thus can not move.
  • two of said at least three switches are formed by a so-called double switching spring.
  • they are made out of a single piece of material, however, form two contacts or have two contact heads.
  • they also have two different switching points, at least one of which is individually adjustable, either by variations. that of his position or by changing his interaction with the feeler.
  • temperatures For adjustment or adjustment of the switching points of the switch, there are several possible and considered advantageous temperatures.
  • One may be at 60 0 C to 90 0 C for an aforementioned hot indication.
  • Another temperature can be 100 ° C to 200 0 C, or even 250 0 C for an automated cooking or Bratfunktion. It should be noted in these temperature specifications that they do not necessarily refer to the temperature directly at the sensor, but when used in a glass ceramic hob on the prevailing at the top of this glass ceramic cooktop temperature.
  • 1 is a sectional view in plan view of a heating device according to the invention with switching device according to a first embodiment of the invention
  • 2 is an enlarged view of a modification of the switching device of FIG. 1
  • Fig. 3 is a circuit diagram for a switching device according to FIG. 1 and
  • Fig. 4 shows a switching device according to a further embodiment of the invention with four switching contacts on two double snap springs.
  • a switching device 11 according to the invention is shown, as it is basically known in principle from the operating principle as the aforementioned rod controller.
  • the switching device 11 has a housing 13, which has a mounting plate 15 on its front side pointing downwards. With this mounting plate 15, the switching device 11 is attached to a heating device 50 according to the invention or a carrier shell 51, for example screwed.
  • the heating device 50 has a planar heating region 52, for example with dashed lines, meandering in the circle running conventional heating conductors 53rd
  • the switching device 11 has a protruding from the housing 13 sensor 17.
  • This consists, as is generally known, of a sensor tube 18 as an outer sensor part, such as temperature-resistant metal.
  • a sensor rod 19 as an inner sensor part, such as a ceramic rod.
  • they can either only be plugged into one another or additionally be firmly connected to one another, for example by pressing the sensor tube 18 onto the sensor rod 19 or by welding, in particular by laser welding.
  • the sensor tube 18 is fixedly connected to the downwardly facing end face of the housing 13 with this.
  • the sensor rod 19 extends out of the sensor tube and far into the housing 13.
  • the sensor rod 19 has a projection 21 which can protrude from it either on one or two sides. Alternatively, it can also as a kind of circumferential collar or the like. be formed, depending on what is easy and easy to handle in the manufacture of the sensor rod 19 as a ceramic rod.
  • the sensor rod 19 can be pressed against a trigger region 24 of a first switch 23, wherein the switch 23 is formed as a basically known snap-action switch or snap-action spring with a contact head at its left end.
  • the switch 23 is formed as a basically known snap-action switch or snap-action spring with a contact head at its left end.
  • the sensor rod 19 extends behind the projection 21 a little further and passes through a trigger region 28 of a second switch 27, which is also designed as a snap-action switch.
  • the end of the sensor rod 19 extends into a sleeve-like attachment part 30, advantageously made of metal or stable plastic.
  • a sleeve-like attachment part 30 advantageously made of metal or stable plastic.
  • the lower end face of the attachment part 30 is located approximately at the triggering area 28 of the second switch 27an.
  • an internal thread 33 is provided to just before the collar 32 along the inner bore. More will be done later.
  • the rear portion 31 of the attachment part 30 extends in a guide sleeve 35, in which it is mounted longitudinally movable.
  • the guide sleeve 35 is secured in the housing 13 with laterally extending arms or shoulders.
  • a coil spring 36 is guided, which is supported upwardly against the guide sleeve 35 and abuts down on the collar 32 of the attachment part 30. So she pushes the attachment 30 down.
  • a first adjusting screw 38 is screwed, and at its front end of the sensor rod 19 abuts.
  • the first adjusting screw 38 is designed in the manner of a grub screw and can be adjusted from above with a tool 45 through the inner bore of the attachment part 30.
  • a second adjusting screw 39 is screwed into the internal thread 33 of the attachment part 30, advantageously with a larger tool 45 than for the first adjusting screw 38.
  • This second adjusting screw 39 rests with its upper region on a triggering region 43 of a third switch 42, which in turn is formed according to the second switch 27.
  • a longitudinal bore or through hole allows the insertion of a smaller tool for adjusting the first adjusting screw 38 when the second adjusting screw 39 is already screwed.
  • the three switches 23, 27 and 42 are connected in a known manner via plug contact tongues 46 as the entire switching device 11 from the outside.
  • FIG. 1 shows a state at a certain temperature, which is clearly above the room temperature, since the projection 21 has already moved beyond the triggering region 24 of the first switch 23.
  • the switch 23 is thus closed.
  • it is designed as a so-called detector contact or hot-contact contact. This means that a signal is triggered and a display on a hob is activated when the temperature at the heating area 52 is so high that more than 50 0 C or 60 0 C are present at the top of the glass ceramic hob.
  • the second switch 27 is designed here as a so-called temperature monitor. This means that it is opened at a temperature and thus a position of the sensor rod 19 when an inadmissibly high temperature is applied or threatening the heating region 52, which could damage a glass-ceramic cooktop panel. However, this temperature is not reached in Fig. 1, since the switch 27 is still closed. However, it can be seen that the front side of the attachment part 30 requires only little movement against the triggering region 28 of the second switch 27 in order to trigger it and thus to separate its contact.
  • an adjustment to the second switch 27 can be performed via the first adjusting screw 38. If the first adjusting screw 38 is screwed further into the internal thread 33 of the attachment part 30 or onto the feeler rod 19, the attachment part 30 moves further upwards and the switching point at which the second switch is actuated by the attachment part 30 when the feeler moves - Bar 19, is moved to higher temperatures or to areas in which the sensor tube 18 is further extended due to higher temperature.
  • a third switching device 42 is now new and it can be provided with a further temperature-dependent function.
  • this may be a switching point which is about 100 ° C. or slightly higher, for example 105 ° C.
  • This can be set to a temperature of about 100 0 C, for example, at the hob or the hob of the heating area 52 for an automatic cooking of water, so to speak, a temperature-controlled heating control.
  • frying with a switching point at a temperature of about 200 0 C to 250 0 C is possible.
  • An adjustment of the third switch 42 is possible by inserting or unscrewing the second adjusting screw 39 in the internal thread 33 of the attachment part 30. If the second adjusting screw 39 is further screwed in, the switching point of the third switch 42 is shifted toward lower temperatures, and vice versa.
  • Fig. 1 and of the arrangement of the adjusting screws 38 and 39 is of course, only the first adjusting screw 38 is to introduce and adjust, before this is done for the second adjusting screw 39.
  • both adjusting screws 38 and 39 can be adjusted with different tools 45, while both adjusting screws already in the Attachment 30 are screwed.
  • the switching path with the switching movement runs in Fig. 1 along the dash-dotted line, ie along the longitudinal or central axis of the sensor rod 19.
  • the switching points for the respective switches are where the switches are triggered or actuated, for example, the projection 21 this Point happened. They are not explicitly drawn in the drawings. However, it is easily possible for the skilled person to take them from the drawings.
  • FIG. 1 A slight modification of the switching device 11 of Fig. 1 is shown in the switching device 11 in Fig. 2 in enlargement.
  • This modification consists in that the second adjusting screw 39 'is a kind of set screw without own head but with inner tool engagement surfaces, for example for a hexagon socket wrench.
  • About the upper end of a loose ring 40 ' is guided, which in turn rests with its upper side on the trigger region 43 of the third switch 42.
  • FIG. 11 A circuit diagram of the switching device 11 including control and heating 50 is shown in FIG. On the left is dashed an energy regulator 55 shown, as it is known as an electromechanical adjusting device, for example from DE 198 33 983 A1.
  • the switching device 11 is shown with the first switch 23 between the external terminals S and H.
  • the second switch 27 is present in the supply line to the heater 50 and the heating conductor 53, which are shown in dashed lines on the right, and third switches 42 in a separate branch.
  • the current is not adjusted via the contact 4 of the energy regulator, but via the contact 4a, so that the current path via the third switch 42 and the contact 2 to the switching device on the e ner regulator 55 11 is running. In this current path and the second switch 27 is looped, which must always be looped because of its safety-relevant function.
  • the third switch 42 is limited to a temperature range of For example, set the above 105 0 C, so he regulates the temperature of the Heinz achieved 50 to 105 ° C this.
  • the second switch 27 with the watchdog function will probably not be used, the first switch 23 with the detector function for the heating indicator, however, already.
  • FIG. 4 Yet another embodiment of a switching device 111 is shown in Fig. 4. While the sensor 117 is the same and is secured to the housing 113, the switches are constructed differently there. Namely, four switches 123, 127, 142 and 148 are provided. However, these switches are formed on double control springs or double snap springs, so in each case two switches on a contiguous piece of sheet metal.
  • the first switch 123 is provided for the aforementioned detector function.
  • the second switch 127 is provided, for example, with the above-mentioned guard function against overtemperature.
  • the triggering of the switches 123 or 127 via a projection 121 on the sensor rod 119, which can press against a common triggering portion 124 of the double shift spring.
  • both switches 123 and 127 have the common trip area 124, the switching points are different or the switches are triggered at different switching points of the switching path of the projection 121.
  • the third switch 142 with the adjusting screw 144 can be set back to a temperature at about 100 0 C for an automatic cooking function with a boiling point of water.
  • the fourth switch 148 can be adjusted with the adjusting screw 149 to a temperature of about 200 0 C to 250 0 C and thus to the point of a roasting function odgl ..
  • Another difference of the switching device 111 of FIG. 4 to that of FIG. 1 is that here no pressure spring or the like.
  • the sensor rod 119 is connected to the 118 so that it always participates with its end portion, with which the switches 142 and 148 are triggered, always the movements that are caused by the changes in length of the sensor tube 118.
  • this structure is mechanically very simple and also functionally very reliable.

Abstract

La présente invention concerne un régulateur de température (11) pour un dispositif de chauffage par radiation (50) avec une sonde allongée (17) et comprenant, dans un carter (13), trois commutateurs (23, 27, 42). Ces derniers sont déclenchés ensemble par la sonde (17) à différents endroits de commutation, respectivement en fonction des températures différentes, et peuvent provoquer ainsi différentes fonctions, en particulier une signalisation ou une commutation à trois points de température différents.
PCT/EP2007/006715 2006-08-08 2007-07-30 Dispositif de commutation pour un dispositif de chauffage ainsi que dispositif de chauffage WO2008017397A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610037712 DE102006037712A1 (de) 2006-08-08 2006-08-08 Schalteinrichtung für eine Heizeinrichtung
DE102006037712.5 2006-08-08

Publications (1)

Publication Number Publication Date
WO2008017397A1 true WO2008017397A1 (fr) 2008-02-14

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PCT/EP2007/006715 WO2008017397A1 (fr) 2006-08-08 2007-07-30 Dispositif de commutation pour un dispositif de chauffage ainsi que dispositif de chauffage

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DE (1) DE102006037712A1 (fr)
WO (1) WO2008017397A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8368503B2 (en) 2009-08-19 2013-02-05 E.G.O. Elektro-Geraetebau Gmbh Temperature sensor and method for adjusting such a temperature sensor
DE102013200279A1 (de) 2013-01-10 2014-07-10 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Backofens und Backofen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3116286A4 (fr) 2015-05-15 2017-04-19 Shenzhen Foda Electric Co., Ltd. Plaque chauffante à régulation de température, isolée thermiquement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2422684A1 (de) * 1974-05-10 1975-11-13 Karl Fischer Schnappschalter
DE3333645A1 (de) * 1983-09-17 1985-04-11 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Temperaturbegrenzer fuer eine glaskeramikkocheinheit
EP0394693A2 (fr) * 1989-04-22 1990-10-31 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Appareil de commutation de température
EP0786923A2 (fr) * 1996-01-26 1997-07-30 AEG Hausgeräte GmbH Système de commutation pour une protection contre le suréchauffement d'une plaque vitro-céramique d'une aire de cuisson

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705260A1 (de) * 1987-02-19 1988-09-01 Ego Elektro Blanc & Fischer Temperaturbegrenzer
DE50112906D1 (de) * 2001-01-10 2007-10-04 Electrovac Temperaturbegrenzer
ATE333141T1 (de) * 2004-02-24 2006-08-15 Electrovac Temperaturfühler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2422684A1 (de) * 1974-05-10 1975-11-13 Karl Fischer Schnappschalter
DE3333645A1 (de) * 1983-09-17 1985-04-11 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Temperaturbegrenzer fuer eine glaskeramikkocheinheit
EP0394693A2 (fr) * 1989-04-22 1990-10-31 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Appareil de commutation de température
EP0786923A2 (fr) * 1996-01-26 1997-07-30 AEG Hausgeräte GmbH Système de commutation pour une protection contre le suréchauffement d'une plaque vitro-céramique d'une aire de cuisson

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8368503B2 (en) 2009-08-19 2013-02-05 E.G.O. Elektro-Geraetebau Gmbh Temperature sensor and method for adjusting such a temperature sensor
DE102013200279A1 (de) 2013-01-10 2014-07-10 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Backofens und Backofen

Also Published As

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