EP0750330A2 - Dispositif de régulation pour un élément de chauffage par rayonnement pour plaque de cuisson - Google Patents

Dispositif de régulation pour un élément de chauffage par rayonnement pour plaque de cuisson Download PDF

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Publication number
EP0750330A2
EP0750330A2 EP96107317A EP96107317A EP0750330A2 EP 0750330 A2 EP0750330 A2 EP 0750330A2 EP 96107317 A EP96107317 A EP 96107317A EP 96107317 A EP96107317 A EP 96107317A EP 0750330 A2 EP0750330 A2 EP 0750330A2
Authority
EP
European Patent Office
Prior art keywords
temperature
control device
additional
heater
expansion sensor
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.)
Withdrawn
Application number
EP96107317A
Other languages
German (de)
English (en)
Other versions
EP0750330A3 (fr
Inventor
Henno Dipl.-Ing. Schotten
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.)
AKO Werke GmbH and Co KG
Original Assignee
AKO Werke GmbH and Co KG
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 AKO Werke GmbH and Co KG filed Critical AKO Werke GmbH and Co KG
Publication of EP0750330A2 publication Critical patent/EP0750330A2/fr
Publication of EP0750330A3 publication Critical patent/EP0750330A3/fr
Withdrawn legal-status Critical Current

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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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0216—Switches actuated by the expansion of a solid element, e.g. wire or rod
    • 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
    • H01H37/14—Means for adjustment of "on" or "off" operating temperature by anticipatory electric heater
    • 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
    • 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
    • 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
    • H01H2037/326—Thermally-sensitive members with radiative heat transfer to the switch, e.g. special absorption surfaces

Definitions

  • the invention relates to a control device for a hotplate radiant heating, wherein an electric radiant heater is arranged under the hotplate, in the effective area of which a rod-shaped expansion sensor is provided, which actuates a mechanical switch contact at an upper limit temperature and thereby switches off the radiator (switch-off temperature).
  • the expansion sensor extends between the glass ceramic hotplate and the radiant heater.
  • the expansion sensor consists of a quartz glass tube in which a temperature-dependent expanding wire (DE 27 48 109 A1) or rod (DE 31 00 758 A1) is arranged, which acts on the mechanical switch contact. If an upper limit temperature is reached, the radiator is switched off. It is switched on again after cooling.
  • an adjustable energy control device In the case of hot plates whose temperature should be adjustable by the user, an adjustable energy control device must be provided in addition to the switching device mentioned. This "clocks" the radiant heater with shorter or longer breaks.
  • DE 28 50 389 C2 describes a temperature controller with a liquid-filled expansion element for a hotplate, by means of which the "clocking" is to be improved.
  • An additional, heatable expansion element is arranged outside the effective range of the radiator.
  • the object of the invention is to develop a switching device of the known type so that the function of an energy regulator is integrated into it, so that the user has the option of choosing a desired temperature.
  • the above object is achieved in a control device of the type mentioned at the outset in that the expansion sensor is within the range of influence of an additional heating element and that a control circuit for the output of the additional heating element is provided, which can be adjusted by means of a manually actuated actuator, the output of the additional heating element in one The range can be adjusted so that the additional heating element brings the expansion sensor to the switch-off temperature when the temperature of the hotplate is lower than the upper limit temperature.
  • the radiant heater heats the hotplate and the expansion sensor. If the additional heating element is not switched on, the expansion sensor switches off the radiant heating element in the usual way via the mechanical switch contact when the limit temperature is reached. If the additional heating element is switched on, it also heats the expansion sensor without significantly heating the hotplate. The switch-off temperature of the expansion sensor is therefore already reached when the hotplate is at a lower temperature. The switch-off point is therefore shifted to lower hotplate temperatures.
  • the user has the option of setting the respective power with which the additional heating element works by means of the actuator. So he can choose a desired hotplate temperature in the end result.
  • the control circuit for setting the output of the additional heating element can be a step switch, a phase control or a pulse packet control.
  • the output of the additional radiator is significantly less than the output of the radiant heater.
  • the output of the additional heating element is preferably so small and / or its assignment to the expansion sensor that it does not prevent the expansion sensor from reaching the switch-on temperature when the radiation heating element is switched off, even when it is working at full output. This ensures that the radiant heater "clocks" in the desired manner even when a low cooking temperature is selected. The low cooking temperature is thus maintained for an arbitrarily long time.
  • An electric heating coil (2) is arranged under a glass ceramic plate (1) and is laid in a spiral.
  • a rod-shaped expansion sensor (3) extends between the glass ceramic plate (1) and the heating coil (2).
  • This has a quartz tube (4) in which an expansion rod (5) is arranged.
  • the expansion rod (5) expands in relation to the quartz tube (4) and, when a switch-off temperature is reached, actuates a mechanical switch contact (6) which is mounted in a housing (7) outside the glass ceramic plate (1).
  • the heating coil (2) which is connected to the electrical network (8), can be switched by means of the switching contact (6).
  • An additional electric heater (9) is wound on the quartz tube (4) (see Fig. 1,2).
  • the additional heater (9) could also be arranged separately from the expansion sensor (3) (see Fig. 3,4).
  • the expansion sensor (3) lies in the thermal effective range of the additional heating element (9). It is also possible to lay the additional heating element (9) in the quartz tube (4).
  • the additional heater (9) is connected to the electrical network (8) via a control circuit (10). With the Control circuit (10) is coupled to an actuator (11) which can be actuated by the user.
  • the control circuit (10) is constructed in such a way that the power of the additional heating element (9) is set in accordance with the setting of the actuator (11).
  • the control circuit (10) is, for example, a step switch with which the full mains voltage or part of the mains voltage can be applied to the additional heating element (9).
  • the control circuit (10) can also be a phase control or a pulse packet control.
  • the nominal output of the additional heating element (9) is considerably smaller than that of the heating coil (2); for example, it is a few watts.
  • the additional heating element (9) itself thus makes an insignificant contribution to the heating of the glass ceramic plate (1).
  • the power emitted by it is not lost and does not require any cooling or insulation measures, since it is in the same room as the heating coil (2).
  • the nominal power of the additional heater (9) is so small or its thermal coupling to the expansion sensor (3) is designed so that after the heating coil (2) is switched off, the expansion sensor (3) cools down to such an extent that the switch contact (6 ) can close again, ie the heating coil (2) switches on again, even if the additional heating element (9) is operated at full power.
  • the nominal output of the additional heater (9) is so large or its thermal coupling to the expansion sensor (3) is designed so that the expansion sensor (3) with the heating coil (2) switched on from the additional heater (9) working at full power to the switch-off temperature is brought when the glass ceramic plate (1) has reached the lowest selectable cooking temperature.
  • the expansion sensor (3) and the switch contact (6) are designed so that the heating coil (2) is switched off when - with the additional heating element (9) switched off - the glass ceramic plate (1) has reached the upper limit temperature at which the glass ceramic plate ( 1) Can be damaged.
  • the additional heating element (9) remains switched off.
  • the heating coil (2) alone heats the expansion sensor (3).
  • the expansion rod (5) switches the switch contact (6), which is usually a snap switch, so that the heating coil (2) is switched off. After cooling, the switch contact (6) closes again.
  • the additional heater (9) works with a corresponding partial output and heats the expansion sensor (3), which is also heated by the heating coil (2) that is switched on.
  • the switch-off temperature of the expansion sensor (3) is now reached at a corresponding earlier point in time.
  • the glass ceramic plate (1) has the set target temperature.
  • the heating coil (2) is switched off.
  • the additional heater (9) is still switched on.
  • the expansion sensor (3) then cools down because the additional heating element (9) alone cannot keep it at the switch-off temperature.
  • the switch contact (6) then closes again and the glass ceramic plate (1) is kept "clocked" at the set target temperature.
  • the additional heating element (9) works continuously at full output. After reaching the Setpoint temperature and switching off the heating coil (2) reduces the temperature of the expansion sensor (3) despite the additional heater (9) working at full power to such an extent that the switch contact (6) closes again and thus switches the heating coil (2) back on.
  • the expansion sensor (3) works in conjunction with the switch contact (6) as a safety temperature limiter.
  • the additional heater (9) is arranged like the heating coil (2) on an insulating support.
  • the coiled additional heating element (9) is - based on the glass ceramic plate (1) - below the expansion sensor (3).
  • an additional heating element (9) is wound on the quartz tube (4) of the expansion sensor (3).
  • Another additional radiator (9) - similar to that in Figure 3 - is arranged below the expansion sensor (3).
  • the two additional radiators (9) can be switched individually or together, and they can be electrically connected in parallel or in series. With this arrangement, the influence of the additional radiators (9) on the expansion sensor (3) can be varied within wide limits.
  • control circuit (10) with the actuator (11) and the housing (7) carrying the expansion sensor (3) into one structural unit.
  • a structurally compact control device is thus created, which has both the function of a safety temperature limiter and the function of an energy regulator.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of Resistance Heating (AREA)
EP96107317A 1995-06-22 1996-05-09 Dispositif de régulation pour un élément de chauffage par rayonnement pour plaque de cuisson Withdrawn EP0750330A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19522748 1995-06-22
DE1995122748 DE19522748A1 (de) 1995-06-22 1995-06-22 Regeleinrichtung für eine Kochplatten-Strahlungsbeheizung

Publications (2)

Publication Number Publication Date
EP0750330A2 true EP0750330A2 (fr) 1996-12-27
EP0750330A3 EP0750330A3 (fr) 1998-01-21

Family

ID=7765032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107317A Withdrawn EP0750330A3 (fr) 1995-06-22 1996-05-09 Dispositif de régulation pour un élément de chauffage par rayonnement pour plaque de cuisson

Country Status (2)

Country Link
EP (1) EP0750330A3 (fr)
DE (1) DE19522748A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2781051A1 (fr) * 1998-07-09 2000-01-14 Electrovac Capteur de temperature pour plaque de cuisson d'un foyer de cuisson
DE102004058473A1 (de) * 2004-11-24 2006-06-08 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, insbesondere Strahlungsheizkörper
CN102256388A (zh) * 2011-06-09 2011-11-23 广东格兰仕集团有限公司 加热器具的焊接结构
CN102573140A (zh) * 2012-01-18 2012-07-11 杭州热威机电有限公司 一种接线片的固定结构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2024153A (en) * 1932-10-06 1935-12-17 Gen Electric Temperature control device
SE151236C1 (fr) * 1951-12-01 1955-08-23
DE1132670B (de) * 1960-02-03 1962-07-05 Siemens Elektrogeraete Gmbh Schalteinrichtung mit Kaltleiter
DE1136432B (de) * 1960-06-08 1962-09-13 Bbc Brown Boveri & Cie Regeleinrichtung fuer elektrische Kochgeraete
DE2748109C2 (de) * 1977-10-27 1982-04-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektrokochgerät
DE3100758A1 (de) * 1981-01-13 1982-09-02 Ako Werke Gmbh & Co Schalteinrichtung
GB2134713A (en) * 1983-01-31 1984-08-15 Diamond H Controls Ltd Energy regulating switch
DE3613902A1 (de) * 1986-04-24 1987-10-29 Ego Elektro Blanc & Fischer Kochplatte, insbesondere fuer grosskuechen-herde
DE68925579T2 (de) * 1989-01-26 1996-08-22 Toshiba Ave Kk Elektrisches Kochgerät
GB9125807D0 (en) * 1991-12-04 1992-02-05 Ceramaspeed Ltd Cooking hob control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2781051A1 (fr) * 1998-07-09 2000-01-14 Electrovac Capteur de temperature pour plaque de cuisson d'un foyer de cuisson
DE102004058473A1 (de) * 2004-11-24 2006-06-08 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, insbesondere Strahlungsheizkörper
DE102004058473B4 (de) * 2004-11-24 2007-09-13 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, insbesondere Strahlungsheizkörper
CN102256388A (zh) * 2011-06-09 2011-11-23 广东格兰仕集团有限公司 加热器具的焊接结构
CN102573140A (zh) * 2012-01-18 2012-07-11 杭州热威机电有限公司 一种接线片的固定结构

Also Published As

Publication number Publication date
DE19522748A1 (de) 1997-01-02
EP0750330A3 (fr) 1998-01-21

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