EP0393506B1 - Fourneau électrique - Google Patents
Fourneau électrique Download PDFInfo
- Publication number
- EP0393506B1 EP0393506B1 EP90107003A EP90107003A EP0393506B1 EP 0393506 B1 EP0393506 B1 EP 0393506B1 EP 90107003 A EP90107003 A EP 90107003A EP 90107003 A EP90107003 A EP 90107003A EP 0393506 B1 EP0393506 B1 EP 0393506B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control circuit
- heating power
- hot
- plates
- switch
- 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.)
- Expired - Lifetime
Links
Images
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 invention relates to an electric cooker with several hot plates, at least one of which can be switched to increased heating power, in particular with glass ceramic cooktops, an electronic control circuit being provided for controlling the hot plates, the clock frequency of which can be switched to a lower value at higher heating powers.
- the energy supply to the hot plates of electric cookers is usually clocked, i. H. at intervals.
- the hotplate is controlled at a constant clock frequency, with the pulse-pause ratio of each energy pulse being 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 invention 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.
- a switch is provided which is used to switch a hotplate to a heating power which is still higher than the maximum power and which at the same time switches the clock frequency in the control circuit to a lower value.
- control circuit outputs 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 output of 2000 watts and the possible clock frequency of 0.04167 at maximum, with lower heating outputs. This gives a more even cooking.
- the control circuit for the cooker is preferably designed as a microprocessor, which also serves to generate the clock. In principle, however, it would also be possible in the sense of the invention to carry out the clock generation by means of a frequency divider with switchable outputs.
- hot plates 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, on 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 hot plates 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 other 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)
- Control Of Resistance Heating (AREA)
- Electric Stoves And Ranges (AREA)
Claims (3)
- Cuisinière électrique comportant plusieurs plaques de cuisson, dont une au moins peut être commutée sur une puissance de chauffage supérieure, en particulier avec des zones de cuisson en vitrocéramique, dans laquelle un circuit de commande (11) électronique, dont la fréquence de cycle aux puissances de chauffage supérieures peut être commutée sur une valeur plus basse, est prévu pour la commande des plaques de cuisson (2 à 5), caractérisée en ce qu'en plus des variateurs de foyer (6 à 9) il est prévu un commutateur (10), qui sert à faire commuter une plaque de cuisson (2) sur une puissance de chauffage encore supérieure à la puissance maximale et qui en même temps commute, dans le circuit de commande (11), la fréquence de cycle sur une valeur plus basse.
- Cuisinière suivant la revendication 1, caractérisée en ce que le circuit de commande délivre des fréquences de cycle différentes à ses sorties, pour commander les différentes plaques de cuisson (2 à 5), en fonction de la puissance de chauffage sélectionnée.
- Cuisinière suivant la revendication 1, caractérisée en ce que le circuit de commande comporte un microprocesseur (12) pour générer le fréquence de cycle.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8905047U | 1989-04-21 | ||
DE8905047U DE8905047U1 (de) | 1989-04-21 | 1989-04-21 | Elektrischer Kochherd |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0393506A2 EP0393506A2 (fr) | 1990-10-24 |
EP0393506A3 EP0393506A3 (fr) | 1992-02-26 |
EP0393506B1 true 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) |
Families Citing this family (1)
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 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1570916A (en) * | 1976-02-06 | 1980-07-09 | Nippon Steel Corp | Method of induction heating of metal materials |
DE2705528A1 (de) * | 1977-02-10 | 1978-08-24 | Weiss Kg Alfons | Vorrichtung zum steuern von vorzugsweise elektrischen heizgeraeten |
DE2731782C2 (de) * | 1977-07-14 | 1983-04-21 | E.G.O.- Regeltechnik GmbH, 7519 Oberderdingen | Steuergerät für Elektrokochplatten |
US4282422A (en) * | 1979-02-01 | 1981-08-04 | General Electric Company | Power control for appliance using multiple high inrush current elements |
-
1989
- 1989-04-21 DE DE8905047U patent/DE8905047U1/de not_active Expired - Lifetime
-
1990
- 1990-04-11 EP EP90107003A patent/EP0393506B1/fr not_active Expired - Lifetime
- 1990-04-11 DE DE59008560T patent/DE59008560D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE8905047U1 (de) | 1990-08-23 |
EP0393506A3 (fr) | 1992-02-26 |
DE59008560D1 (de) | 1995-04-06 |
EP0393506A2 (fr) | 1990-10-24 |
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