EP0393506A2 - Fourneau électrique - Google Patents

Fourneau électrique Download PDF

Info

Publication number
EP0393506A2
EP0393506A2 EP90107003A EP90107003A EP0393506A2 EP 0393506 A2 EP0393506 A2 EP 0393506A2 EP 90107003 A EP90107003 A EP 90107003A EP 90107003 A EP90107003 A EP 90107003A EP 0393506 A2 EP0393506 A2 EP 0393506A2
Authority
EP
European Patent Office
Prior art keywords
control circuit
outputs
hot plates
heating power
clock frequency
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
EP90107003A
Other languages
German (de)
English (en)
Other versions
EP0393506B1 (fr
EP0393506A3 (fr
Inventor
Alfred Meisner
Erwin Potthof
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Publication of EP0393506A2 publication Critical patent/EP0393506A2/fr
Publication of EP0393506A3 publication Critical patent/EP0393506A3/fr
Application granted granted Critical
Publication of EP0393506B1 publication Critical patent/EP0393506B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F24C15/106—Tops, e.g. hot plates; Rings electrically heated electric circuits

Definitions

  • the innovation relates to an electric cooker with several hot plates, at least one of which can be switched over to increased heating output, in particular with glass ceramic cooktops.
  • the energy supply to the hot plates of electric cookers is usually clocked, i. H. at intervals.
  • the hotplate is controlled with a constant clock frequency, whereby the pulse-pause ratio of each energy pulse is changed depending on the setting of the hotplate controller.
  • the pulse time is small within a pulse period, whereas the pulse pause is large, with large powers, however, the pulse time is long and the pulse pause is short.
  • the provisions of the VDE for the operation of such devices stipulate that the clock frequency with a power input of 2000 watts in the 220V network must not be greater than 0.04167 Hz, with even higher powers of e.g. B. 2500 watts even a maximum of 0.025 Hz.
  • the object of the innovation is therefore to design an electric cooker in such a way that it is operated at the maximum permissible frequency when supplying energy to the hot plates or the hob.
  • an electronic control circuit for controlling the hot plates is provided, the clock frequency of which can be switched to a lower value with higher heating power.
  • a so-called roasting stage can be switched on, in which a heating power of 2500 watts constant can be supplied.
  • the innovation proposes that a changeover switch be provided which serves to switch a hotplate to increased heating power and which at the same time switches the clock frequency to a lower value in the control circuit. This lower value is 0.025 Hz according to VDE regulations.
  • control circuit it is also possible for the control circuit to output different clock frequencies at its outputs for controlling the individual hot plates, depending on the heating power set. This makes it possible to work with a higher clock frequency in accordance with the values permitted by the VDE, even in the range below the maximum heating power of 2000 watts and the possible clock frequency of at most 0.04167 at lower heating powers. This gives a more even cooking.
  • the control circuit for the cooker is preferably designed as a microprocessor, which is also used for clock generation. In principle, however, in the sense of the innovation, it would also be possible to carry out the clock generation by means of a frequency divider with switchable outputs.
  • hotplates 2, 3, 4 and 5 are provided, which can be controlled by the hotplate controllers 6 - 9 in their heating power.
  • a switch 10 is used to switch the hotplate 2 to an increased heating power of 2500 watts.
  • the electrical control circuit is designated 11, which contains a microprocessor 12, at the control inputs of which both the changeover switch 10 and the hotplate controller 6 - 9 are located.
  • These hotplate controllers are shown schematically as switches that can be adjusted in several positions.
  • the control signals for controlling the hotplates are taken from the outputs of the microprocessor.
  • a relay 13 is represented as a representative of the other outputs, which controls the heating power for the hotplate 2 by controlling the clock signals of the microprocessor.
  • a frequency f1 for heating power up to 2000 watts or a frequency f2 for a heating power of 2500 watts is given.
  • constant frequencies f 1 can be emitted for the remaining hot plates, provided that these hot plates are to be operated in the usual way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of Resistance Heating (AREA)
EP90107003A 1989-04-21 1990-04-11 Fourneau électrique Expired - Lifetime EP0393506B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8905047U 1989-04-21
DE8905047U DE8905047U1 (fr) 1989-04-21 1989-04-21

Publications (3)

Publication Number Publication Date
EP0393506A2 true EP0393506A2 (fr) 1990-10-24
EP0393506A3 EP0393506A3 (fr) 1992-02-26
EP0393506B1 EP0393506B1 (fr) 1995-03-01

Family

ID=6838534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107003A Expired - Lifetime EP0393506B1 (fr) 1989-04-21 1990-04-11 Fourneau électrique

Country Status (2)

Country Link
EP (1) EP0393506B1 (fr)
DE (2) DE8905047U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19941299A1 (de) * 1999-08-31 2001-03-01 Eckhard Wahl Steuerung der Wärmeregelung einer Kochplatte am E-Herd mit elektronischem Zeitschaltglied, kombiniert mit Wärmefühler

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340664A1 (fr) * 1976-02-06 1977-09-02 Nippon Steel Corp Procede de chauffage par induction de materiaux metalliques
DE2705528A1 (de) * 1977-02-10 1978-08-24 Weiss Kg Alfons Vorrichtung zum steuern von vorzugsweise elektrischen heizgeraeten
DE2731782A1 (de) * 1977-07-14 1979-01-25 Ego Regeltech Steuergeraet fuer elektrokochplatten
GB2120471A (en) * 1979-02-01 1983-11-30 Gen Electric Power control for appliance using resistive heating elements

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340664A1 (fr) * 1976-02-06 1977-09-02 Nippon Steel Corp Procede de chauffage par induction de materiaux metalliques
DE2705528A1 (de) * 1977-02-10 1978-08-24 Weiss Kg Alfons Vorrichtung zum steuern von vorzugsweise elektrischen heizgeraeten
DE2731782A1 (de) * 1977-07-14 1979-01-25 Ego Regeltech Steuergeraet fuer elektrokochplatten
GB2120471A (en) * 1979-02-01 1983-11-30 Gen Electric Power control for appliance using resistive heating elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19941299A1 (de) * 1999-08-31 2001-03-01 Eckhard Wahl Steuerung der Wärmeregelung einer Kochplatte am E-Herd mit elektronischem Zeitschaltglied, kombiniert mit Wärmefühler

Also Published As

Publication number Publication date
DE8905047U1 (fr) 1990-08-23
DE59008560D1 (de) 1995-04-06
EP0393506B1 (fr) 1995-03-01
EP0393506A3 (fr) 1992-02-26

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