EP0901309A2 - Regulateur de puissance - Google Patents

Regulateur de puissance Download PDF

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Publication number
EP0901309A2
EP0901309A2 EP98115581A EP98115581A EP0901309A2 EP 0901309 A2 EP0901309 A2 EP 0901309A2 EP 98115581 A EP98115581 A EP 98115581A EP 98115581 A EP98115581 A EP 98115581A EP 0901309 A2 EP0901309 A2 EP 0901309A2
Authority
EP
European Patent Office
Prior art keywords
power control
control device
heating
switch
contact
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Withdrawn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
EP98115581A
Other languages
German (de)
English (en)
Other versions
EP0901309A3 (fr
Inventor
Franz Dr. Bogdanski
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 EP0901309A2 publication Critical patent/EP0901309A2/fr
Publication of EP0901309A3 publication Critical patent/EP0901309A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/06—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
    • H01H61/063—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts making use of a bimetallic element

Definitions

  • the invention relates to a power control device, in particular for electrical heating devices, with a thermal over electrical Control heating actuated trigger device for one therein included device switch by the trigger device is switchable.
  • power control devices are, for example as clocking power control devices in electric cookers used.
  • the control means can include a controller, in particular low-current electronics and other components contain. In the control means or the control become the conditions for a change in tax heating checked. You can use sensors or detection means for Detection of various operating states of the power control device device supplied with electrical energy or other external conditions.
  • the control means can be used for a pot detection function Pot detection means can be connected to one of the Power control device supplied with electrical power Radiators are assigned to detect a patch Pot, especially one provided for this radiator Pot size.
  • the pot detection means can be one or multi-winded pot detection coil can be designed that pot size detection enables. This is mostly at so-called dual-circuit heaters, which operate a enable small or large pots on a hob, advantageous.
  • the pot detection means are preferred directly connected to the control.
  • the radiator can be of any kind, it only has to be for one Control with a power control device according to the Have control of the prior art or the invention.
  • control means contain Switching means, usually as a semiconductor switch or the like are executed. These can be low Control voltages and currents can be controlled.
  • the trigger device at least one bimetal element and as control heating has at least one heating device.
  • the control heater can be on the side of the bimetallic element can be arranged, the larger Has expansion coefficient. It is also possible that Control heating the bimetal element at least partially to perform surrounding. In normal operation, it can run in parallel to the radiator switched by the power control device are on the supply voltage, with a switching clock is preferably dependent on the position of the device switch.
  • the Tripping device on an additional heater that forms part of the control heating. It works with electrical, in particular from tax funds, Power applied in addition to the regular heating device on the bimetal and contributes to its deformation at. In this way it is possible to increase the Control heating by the additional heating device too achieve, and for example a consequent of the control means controlled shutdown of the radiator.
  • the trigger device has a single heating resistor on.
  • the control means can the resistance value by additional contacting or partial bridging by means of the contact and switching means change, with the heating resistor due to this change an increased heating capacity generated, in particular by increased current flow at a constant applied voltage.
  • the heating device can be a flat, in particular elongated, Heating resistor, especially a thick film resistor, be on a support that is at least partially through the contact means is contacted. This makes it possible for example a part or section of the heating resistor short circuit to achieve a higher current flow, the an increase in heat development and thus the heating output has the consequence. Shorting can be done easily by an additional contact spring or the like directly to the flat resistance or one with a point or Section connected in the area of the heating resistor Contact field.
  • a carrier can either be made of insulating Ceramic material or metal, the one Has insulating layer for heating resistors. Are suitable so-called thick-layer steels, e.g. a stainless steel 1.4016.
  • a Metallic carrier can be used to make contact with a heating resistor to serve.
  • the power control unit Locking means provided by actuation by the triggering device switch, in particular the Switch contact, automatic and independent of the triggering device hold and / or lock in a switch position. This will turn off the heater after it has been completed Locking possible, reducing both energy consumption as well as wear can be reduced.
  • the preferred Switch position is an open device switch.
  • the locking means can be actuated, in particular deactivated by turning back an actuator and the device switch, especially the switch contact, release for switching again.
  • the actuator can be a commonly used rotary knob for Power control devices that are on the same axis as one Adjustment device for the performance level sits. A through possible malfunctions in the control means Switching on again by the electronics becomes impossible made.
  • the control means preferably have a time delay element, whose time delay particularly depends on the amount of Power levels of the power applied to the radiator is dependent. So it is possible, for example, after Detect an absence of a saucepan on a hotplate that Switch off after a few seconds. This is This is particularly advantageous if a pot is only for a short time has been moved or removed. The user can use the pot set up again before switching off.
  • control of several, in particular four, power control devices for each heating of a cooking area of an electric cooker are connected, the switching and the Contact means as well as an optional pot detection for each Power control unit are available. In this way the Effort for a with power control devices according to the invention equipped electric stove to a minimum.
  • the device switch can operate in the medium power range variable contact distance between switching and counter contact exhibit.
  • the invention is despite the description for electric stoves a variety of electrical heating devices generally applicable.
  • the device switch preferably has to optimize the Switching operations a snap element carrying the switching contact, especially a snap spring with a striking fork, on. This allows the switching operations of the snap element in both directions can be carried out particularly quickly and annoying contact erosion or sticking of the contacts and Radio interference is reduced or avoided.
  • FIG. 1 is an internal view of a clocking Power control device 11 shown for electric heaters. It has a device switch 12 which one closes contact. This contact consists of one fixed counter contact 14 and a switching contact 15, the is attached to the device switch 12.
  • the switch contact 15 is a commonly used dome-shaped contact head, which is fixed by riveting.
  • the switch contact 15 is elongated at one end bistable snap spring 16 attached and protrudes on both Pages about this about.
  • the snap spring 16 has two elongated hairpin-shaped legs 22 on your at the Switch contact 15 opposite end 17 merged are attached to a carrier 18. Between the legs 22 the snap spring 16 runs a snap bracket 19, the near the end of the Schanppfeder carrying the switch contact 15 bent upwards in the direction of the free end 17, and there curved upward under tension standing against an abutment 20 is applied.
  • This Abutment is attached to a support plate 21 and is preferably from part of the also on the support plate 21st attached bracket 18 formed.
  • the function of the device switch In principle, 12 looks like this:
  • the switching process of the device switch 12 is triggered by an actuator in the form of a downward bent Bimetal elements 24. It lies with one of the device switches facing top, which is essentially rectilinear runs, on a heater 25 or the like. With the free end, which is bent like a hook, that lies Bimetallic element 24 at the free end 17 of the snap spring 16.
  • the bimetal element 24 and the heating device 25 form in FIG this case essentially the triggering device for the Device switch 12.
  • the Heating device 25 is together with the bimetal element 24 in a bracket 26 held on the housing of the power control unit 11 is resiliently attached.
  • the bracket 26 forms part of the contacting for the heater 25.
  • a main contact spring 28 and an additional contact spring 29 provided, each with one end of the heating device Contact 25, and preferably through their other end are connected to a power supply.
  • the contact springs 28 and 29 are on a cylindrical main projection 31 or a cylindrical additional projection 32 mounted and / or supported.
  • the heater 25 is only when the contact is closed between the switching contact 15 and the counter contact 14 of Current flowed through, as did the parallel one Electric heater, see Fig. 4 and 5. It heats up Heating device 25, the bimetallic element 24, its shape changed and by an increasing curvature towards the Snap spring 16 presses on its free end 17. After expiration a certain time given by an increase in Heat development in the heating device 25 and / or the Change in shape of the bimetallic element 24 is the free end 17 the snap spring 16 pressed so far that the Leg 22 is below the switch point, whereupon the snap spring snaps and the switch contact 15 of the Counter contact 14 releases.
  • a change in this path length is known achieved that the support plate 21, the snap spring 16th carries, against the outer radius of a cam 34, which an axis 35 sits, is pressed elastically.
  • a rotary knob not shown, in an electric cooker forms an actuator for the power control unit 11.
  • the axis 35 lies depending on the set Position the support plate 21 at another location on the Outer circumference of the cam disc 34, and depending on the radius the disc at this point is the support plate and thus the snap spring 16 in a certain position to the Bimetallic element 24.
  • a low level of performance is the Radius large, whereby the device switch 12 is close to the Tripping device is located.
  • the bimetallic element 24 only has to cover a short distance to switch the device switch.
  • the radius is small and the device switch has one larger distance from the trigger device. So must the bimetallic element 24 has a larger path (corresponds to larger Time) to switch the device switch 12 to switch.
  • the setting in FIG. 1 corresponds to one medium performance level.
  • the top view of the heater 25 in FIG. 2 is their structure and connection can be clearly seen.
  • On one Ceramic carrier 37 is a connection contact field on the left side 38 applied on the right side in the lower Half a main contact pad 39 and one in the top half Additional contact field 40.
  • Starting from the connection contact field 38 run two elongated thick film resistors as Heating resistors to contact fields 39 and 40 on the right side. These are one to the main contact field 39 running main heating resistor 41 and one to the additional contact field 40 running additional heating resistor 42.
  • the contact fields 38, 39 and 40 consist of one usually in the Thick film technology used for contact fields metal alloy, while the thick film resistors 41 and 42 are off specially coordinated for this purpose and definitely different resistance alloys can exist.
  • There the thick film resistors according to the contact fields on the Ceramic carrier 37 are applied is a very good one You can contact them via the contact fields.
  • the ceramic carrier 37 With its left end, the ceramic carrier 37 is in the Bracket 26 held in a manner not described in detail.
  • a downward-reaching contact tongue 44 contacted the contact pad 38 via the bracket 26.
  • the further contact is made on the one hand by the main contact spring 28, which is mounted on the main projection 31 and rests against the main contact pad 39 in an elastically pressed manner. It is in a manner not shown with a connection option connected.
  • the additional contact spring also contacts 29 the additional heating resistor 42 via the additional contact field 40. It is mounted on the additional projection 32 and in a manner not shown with a connection option connected.
  • the connection options can either over the free ends of the springs.
  • a heater 25 is shown, the used instead of that of Fig. 2 in a power control device can be.
  • the ceramic carrier 37 also has the left side the contact pad 38 and on the right the main contact field 39. From the connector pad 38 runs a thick film resistor 45 to the Main contact field 39. It runs approximately in the middle a contact bridge 46 leading to one above the main contact field 39 applied additional contact field 40 passes. The thick-film resistor can thus be applied via this additional contact field 40 45 contacted at the location of the contact bridge 46 become.
  • the contact bridge 46 divides it in half, namely in a main part resistor 48 in the left section and a sub-section resistor 49 in the right section.
  • At a contact through the connector pad 38 and the Main contact spring 28 are the main part resistor 48 and the Secondary resistor 49 connected in series.
  • the ceramic carrier 37 is with its left end held in the bracket 26, again the Contact tongue 44 contacts the contact pad 38.
  • Fig. 4 shows the basic connection of a radiator 51 of an electric heating device via an inventive Power control unit 11 at two voltage connections P1 and P2, which preferably have mains voltage.
  • P1 and P2 which preferably have mains voltage.
  • the other connection of the radiator 51 is permanently at connection P2.
  • the device switch 12 is by the trigger device operated here by a heater 25 accordingly 2 is shown. This consists, as in FIG. 2 shown, from a main heating resistor 41 and one Additional heating resistor 42. The main heating resistor is located here 41 parallel to the radiator 51. In the power control unit 11 may be further switching contacts that regardless of the device switch 12 or simultaneously with him can be operated by the trigger device. The is shown by the open representation of the Power control unit clarifies.
  • a control 53 is also shown as the control means, which contains, among other things, low-current electronics 54.
  • a pot detection sensor 55 as a pot detection means connected, which is assigned to the radiator 51.
  • the low-current electronics 54 the connector of the radiator 51 connected to the connector P1 can be closed.
  • switch S1 and S2 which are formed by electronic switches.
  • the switches are operated S1 and S2 through the low-current electronics 54.
  • Preferred semiconductor switches are used, for example triac's or transistors.
  • the switches S1 and S2 are on their other connection connected to each other and via a connecting line 57 connected to the additional heating resistor 42.
  • a Microprocessor included by special programming a desired operation of the power control device can effect.
  • Controller 53 For the power supply of the low-current electronics is in the Controller 53 contain a power supply 58, which by a series resistor, a zener diode matching the desired one Contains voltage and a capacitor.
  • Fig. 5 corresponds essentially to that of Fig. 4, but here the heater 25 is corresponding 3 executed.
  • the controller 53 has only that Switch S1 open.
  • the thick-film resistor is connected via the connecting line 57 45 of the heating device 25 approximately in the middle contacted, and so according to FIG. 3 in the main part resistance 48 and the secondary resistor 49 divided.
  • a desired performance level is set and accordingly is the device switch 12 in a certain Position to the trigger device.
  • the switch contact 15 bears on the mating contact 14, so both are Radiator 51 and the heater 25 at least partly on the mains voltage via connections P1 and P2 on.
  • the radiator 51 is powered and sets the Cooking area in operation.
  • the heater 25 is also flowed through by electricity and developed heat. In individual cases is that either the main heating resistor 41 or the series connection from main part resistance 48 and secondary part resistance 49. Due to the development of heat, they act on the bimetal element 24 one that starts on the device switch 12 act. Depending on the position of the device switch will switch device switch 12 after a certain time and open the contact. Thus, neither radiators 51 still the heater 25 continues to flow through electricity.
  • a switch-off process that takes place independently of the clocking by changing the control heating can be divided into two cases become.
  • Switching off can be done either by removing the pot from the hotplate or by exceeding the maximum operating time (depending on the set performance level) to be triggered. If one of these two cases exists, the low power electronics 54 decides that shutdown shall be.
  • the switched-on state of the device switch 12 recognizes the controller 53 via the signal line 56 on the when the device switch is closed, the voltage signal from P1 is present, but not when open.
  • the heating device 25 and Locking means can save energy lock the device switch in the open position. This can be in contrast to the normal opening of the device switch 12 done by the bimetallic element 24 that the additional heating power the bimetal element is deformed even further and thereby the locking means activated. Thereafter, the controller 53 can also switch S1 open, and the device switch 12 remains open.
  • the device switch is open:
  • the low power electronics 54 decides that shutdown to be recognized by the signal line 56 that the Device switch 12 just during the opening period in the open position.
  • the switch S1 becomes equal closed, and thereby either the device switch permanently kept open or, as described above, the locking means activated.
  • Fig. 4 and Fig. 5 exactly the same.
  • the switch S1 is closed, the Secondary resistance 49 bridges and only the main resistance 48 to the mains voltage. This will increase the heat increased according to the invention.
  • the heater 51 may turn off triggered by removing the pot from the hotplate become. It is possible to switch off the maximum operating time to provide.
  • the level of a set performance level recognizes the low-current electronics 54 via the radiator 51 connected signal line 56, or via the Duration of the on or off State of the device switch 12 Controller 53 determine the maximum operating time after which it causes a shutdown. In the controller 53 microprocessor can be programmed A number of other situations are given that a Switching off should result.
  • a power control device can be equipped with two-circuit heaters be used.
  • the design of the resistors 41, 42 or 48 and 49 can be varied in a very wide range to a desired one To achieve function.

Landscapes

  • Control Of Resistance Heating (AREA)
  • Cookers (AREA)
  • Electric Stoves And Ranges (AREA)
EP98115581A 1997-09-04 1998-08-19 Regulateur de puissance Withdrawn EP0901309A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19738677 1997-09-04
DE1997138677 DE19738677A1 (de) 1997-09-04 1997-09-04 Leistungssteuergerät

Publications (2)

Publication Number Publication Date
EP0901309A2 true EP0901309A2 (fr) 1999-03-10
EP0901309A3 EP0901309A3 (fr) 1999-12-08

Family

ID=7841186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98115581A Withdrawn EP0901309A3 (fr) 1997-09-04 1998-08-19 Regulateur de puissance

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EP (1) EP0901309A3 (fr)
DE (1) DE19738677A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014805A1 (de) * 2008-03-10 2009-03-05 E.G.O. Elektro-Gerätebau GmbH Leistungssteuergerät für ein Elektro-Haushaltsgerät und Verfahren zum Betrieb eines Leistungssteuergeräts
DE102021202314A1 (de) * 2021-03-10 2022-09-15 E.G.O. Elektro-Gerätebau GmbH Leistungssteuergerät und Anordnung eines solchen Leistungssteuergeräts mit einer elektrischen Heizeinrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829279A (en) * 1986-11-15 1989-05-09 E.G.O. Elektro-Gerate Blanc U. Fischer Electric switching device, operable for power control
EP0429120A2 (fr) * 1989-11-17 1991-05-29 Whirlpool Europe B.V. Dispositif pour déterminer l'existance d'une casserole sur une plaque de cuisson
US5243172A (en) * 1990-09-28 1993-09-07 U.S. Philips Corp. Cook-top with automatic controls
US5396047A (en) * 1991-09-12 1995-03-07 E.G.O. Elektro-Gerate Blanc U. Fischer Electric heating unit with alternately heated surface areas
DE19533554A1 (de) * 1994-09-09 1996-03-14 Strix Ltd Energieregelvorrichtung
DE19503174A1 (de) * 1995-02-01 1996-08-08 Bosch Siemens Hausgeraete Leistungssteuerungsgerät

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829279A (en) * 1986-11-15 1989-05-09 E.G.O. Elektro-Gerate Blanc U. Fischer Electric switching device, operable for power control
EP0429120A2 (fr) * 1989-11-17 1991-05-29 Whirlpool Europe B.V. Dispositif pour déterminer l'existance d'une casserole sur une plaque de cuisson
US5243172A (en) * 1990-09-28 1993-09-07 U.S. Philips Corp. Cook-top with automatic controls
US5396047A (en) * 1991-09-12 1995-03-07 E.G.O. Elektro-Gerate Blanc U. Fischer Electric heating unit with alternately heated surface areas
DE19533554A1 (de) * 1994-09-09 1996-03-14 Strix Ltd Energieregelvorrichtung
DE19503174A1 (de) * 1995-02-01 1996-08-08 Bosch Siemens Hausgeraete Leistungssteuerungsgerät

Also Published As

Publication number Publication date
DE19738677A1 (de) 1999-03-11
EP0901309A3 (fr) 1999-12-08

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