EP0489383A2 - Steuervorrichtung für Mikrowellenofen - Google Patents

Steuervorrichtung für Mikrowellenofen Download PDF

Info

Publication number: EP0489383A2
Authority: EP; European Patent Office
Prior art keywords: microwave; movable; oven; operating modes; grill
Prior art date: 1990-12-05
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

EP91120660A

Other languages

English (en)

French (fr)

Other versions

EP0489383B1 (de

EP0489383A3 (en

Inventor

Pierre Chartrain

Michel Guy De Matteis

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.)

Moulinex SA

Original Assignee

Moulinex SA

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.)

1990-12-05

Filing date

1991-12-02

Publication date

1992-06-10

1991-12-02 Application filed by Moulinex SA filed Critical Moulinex SA

1992-06-10 Publication of EP0489383A2 publication Critical patent/EP0489383A2/de

1992-09-30 Publication of EP0489383A3 publication Critical patent/EP0489383A3/fr

1994-10-19 Application granted granted Critical

1994-10-19 Publication of EP0489383B1 publication Critical patent/EP0489383B1/de

2011-12-02 Anticipated expiration legal-status Critical

Status Expired - Lifetime 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
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/647—Aspects related to microwave heating combined with other heating techniques
- H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
- 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
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices

Definitions

the invention relates to the operation of a microwave oven and more particularly to a device for controlling the electrical supply circuit making it possible to select one of the following three operating modes: a first microwave mode or a second grill mode or a third mode in combined microwave grill.
microwave ovens have the three aforementioned operating modes and comprise on their external front face a movable mounted handle which acts, for example by its rotation by a user, on a single switch.
This switch selects, by its position, an operating mode chosen by the user.
This switch is generally bulky (it occupies an important place in the housing of the external front face of the microwave oven because of its large thickness) and is expensive.
this switch is also used on microwave ovens comprising only two operating modes (microwave or grill), which increases the cost price of these microwave ovens.
the object of the invention is to remedy these drawbacks by finding a simple and economical control device, easy to implement and which selects one of the three operating modes of such a microwave oven.
the control device comprises two micro-switches (A and B) mounted in said supply circuit, and which on the one hand, each comprise a control key actuating a movable contact located between two fixed contacts and controlled by actuation means carried by said movable handle so as to selectively obtain one of the three operating modes chosen by positioning the movable handle and, on the other hand, are positioned inside said oven in a regulating and supply device authorizing the operation of the microwave oven.
a and B micro-switches
control device Thanks to the control device according to the invention, the space requirement is reduced since the control device has a thickness which does not exceed that of the housings of said microswitches and the possibility of using a single microswitch to perform a grill function. or microwave enables the price of the component to be halved, thereby reducing the cost price of the microwave oven.
FIG. 1 shows the external front face of a microwave oven on which is mounted the movable handle equipping the device according to the invention
FIG. 2 represents the control device according to the invention
FIG. 3 represents an example of use of the control device according to the invention placed in a microwave oven
FIG. 4 represents the electrical connections of the control device according to the invention.
the front part of the microwave oven F comprises a housing 1 comprising, inter alia, on its external front face, a handle 2 movable mounted of which only the front face is shown; this movable lever 2 is capable of selecting an operating mode of said oven.
These operating modes for example three in number, are a first mode in microwave (MO) or a second mode by resistance heating called grill or a third mode Grill combined with microwave (MO + grill).
the user for example, by rotating the movable lever 2, thus determines one of the operating modes which he desires.
This handle 2 is mounted movable about an axis XX 'transverse to the front face of the furnace.
the inner face of the housing 1 comprises, for example, the movable lever 2 whose rear face is shown, a microswitch A of conventional type fixed on the housing 1, for example by bonding and a microswitch B fixed on the housing 1 in the same way as the microswitch A.
the mobile joystick 2 is shown in any position not corresponding to a particular operating mode.
These microswitches A and B are positioned so that actuation means of the movable joystick 2 act alternately on the control keys 3 and 4 of each of the microswitches A and B.
the actuation means of the movable lever 2 consist, for example, of tongues 5 and 5 'fixed axially on the internal face of the movable lever 2 and each extending in an arc of circle concentric with the axis XX'; these tabs 5 and 5 ′ are, for example, two in number and are spaced apart by a determined distance to allow non-simultaneous actuation of the control keys 3 and 4 of each of the micro-switches A and B.
the micro- switches A and B are, for example, two-position microswitches. Each microswitch A or B has, for example, an input 6 or 6 'and two outputs 7 and 8 or 7' and 8 '.
the control device 30 placed on the internal front face of the housing 1 is connected to a regulation and supply device known per se in a microwave oven; said device includes, for example, a timer 9, a fan motor 10, a power supply 11, a relay 12 with contactor 15, a resistor 13 ensuring the grill operation, a transformer 14 of the magnetron M (shown in dashed lines) allowing the microwave operation, and safety systems S1, S2, S3 and S4 ensuring the proper functioning of the oven.
a regulation and supply device known per se in a microwave oven; said device includes, for example, a timer 9, a fan motor 10, a power supply 11, a relay 12 with contactor 15, a resistor 13 ensuring the grill operation, a transformer 14 of the magnetron M (shown in dashed lines) allowing the microwave operation, and safety systems S1, S2, S3 and S4 ensuring the proper functioning of the oven.
the control device 30 comprises an input 16 connected directly to the timer 9 shown in FIG. 3 and two outputs 17 and 18 connected respectively to the transformer 14 of the magnetron M and to the relay 12 triggering the operation of the resistor 13
the input 16 of the control device is divided into two lines 19 and 20, one 19 is connected to the input 6 of the microswitch A and the other 20 is connected to the input 6 'of the microswitch. switch B.
On the input 6 of the micro-switch A is fixed a first movable contact 21 controlled by the key 3; this movable contact 21 allows switching between two fixed contacts 22 and 23 linked respectively to outputs 7 and 8 of microswitch A.
the output 7 is not connected to any element, the output 8 is connected to the transformer 14 of the magnetron thus ensuring , when the movable contact 21 has been switched, the microwave operation.
a second movable contact 24 is fixed, controlled by the key 4; this movable contact 24 allows switching between two fixed contacts 25 and 26 linked respectively to the outputs 7 'and 8' of the microswitch B.
the output 7 ' is connected to the relay 12 controlling the resistor 13 which ensures the operation in grill mode.
the output 8 ' is connected to the output 8 of the microswitch A by an electrical connection 31 and therefore allows operation in microwave mode.
An operation of the control device is, for example, as follows: in the initial state, the movable lever 2 being in the position MO, one of the tongues 5 of the means for actuating the lever 2 activates only the control button 4 of microswitch B while the control button 3 of microswitch A is not activated, thus leaving the movable contact 21 of microswitch A in a rest position since it is connected to the output 7.
the control button 4 allows the switching of the movable contact 24 which thus activates the output 8 ', that is to say the output ensuring the operation in MO.
the movable lever 2 rotating, for example by a quarter of a turn, is in the grill position as mentioned on the external front face of the housing of the microwave oven shown in FIG. 1.
said tongue 5 of the means actuating the movable lever 2 deactivates the control button 4 of the microswitch B thus acting on the movable contact 24; the latter allows the connection of the input 6 'to the output 7', that is to say to the output connected to the resistor 13 of the operation in grill mode, while the other tab 5 'does not always act not on control button 3 of microswitch A which remains inactive and occupies the same position as in the previous mode.
the movable lever 2 performing a second quarter turn is in the position (MO + grill) as mentioned on the external front face of the microwave oven housing shown in FIG. 1.
the control button 4 of the microswitch B is always deactivated and therefore allows the connection of the input 6 'with the output 7', on the other hand, the control key 3 of the microswitch A is activated by the tongue 5 'of the actuating means of the mobile joystick 2.
the movable contact 21 is thus switched and activates the output 8 of the microswitch A which is connected to the transformer 14 of the magnetron ensuring microwave operation. In this way, the combined microwave grill operation is obtained.
the control device can be easily simplified. Indeed, in such a case, it suffices to delete one of the two micro-switches, in this case the micro-switch A, and the micro-switch B ensures the desired operation, namely microwave or grill. This solution thus reduces the cost of the initial component which decreases the overall cost price of the microwave oven.

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Electromagnetism (AREA)
Electric Ovens (AREA)
Control Of High-Frequency Heating Circuits (AREA)
Constitution Of High-Frequency Heating (AREA)
Vending Machines For Individual Products (AREA)

EP91120660A 1990-12-05 1991-12-02 Steuervorrichtung für Mikrowellenofen Expired - Lifetime EP0489383B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9015221		1990-12-05
FR9015221A FR2670273B1 (fr)	1990-12-05	1990-12-05	Dispositif de commande d'un four a micro-ondes.

Publications (3)

Publication Number	Publication Date
EP0489383A2 true EP0489383A2 (de)	1992-06-10
EP0489383A3 EP0489383A3 (en)	1992-09-30
EP0489383B1 EP0489383B1 (de)	1994-10-19

Family

ID=9402916

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP91120660A Expired - Lifetime EP0489383B1 (de)	1990-12-05	1991-12-02	Steuervorrichtung für Mikrowellenofen

Country Status (7)

Country	Link
EP (1)	EP0489383B1 (de)
KR (1)	KR100220255B1 (de)
AT (1)	ATE113155T1 (de)
DE (1)	DE69104697T2 (de)
ES (1)	ES2064028T3 (de)
FR (1)	FR2670273B1 (de)
PT (1)	PT99682B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0609161A1 (de) *	1993-01-29	1994-08-03	Eaton Controls S.A.	Steuerschalter für Kombinierter Mikrowellen- und Grillofen
EP0750445A3 (de) *	1995-06-23	1997-01-02	Daewoo Electronics Co., Ltd	Bedienungsschalter für Mikrowellenofen
EP0756440A1 (de) *	1995-07-26	1997-01-29	Daewoo Electronics Co., Ltd	Vorrichtung zum Steuern der Leistung eines Mikrowellenofens

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3046364A (en) *	1959-09-28	1962-07-24	Gen Railway Signal Co	Token operated electrical switches
USRE27545E (en) *	1971-08-13	1973-01-09		Range open door latching device
US4403128A (en) *	1976-03-11	1983-09-06	Sharp Kabushiki Kaisha	Microwave oven with a capability of functioning as an electric heating oven
JPS55143791A (en) *	1979-04-24	1980-11-10	Tokyo Shibaura Electric Co	High frequency heater
JPS56102620A (en) *	1980-01-21	1981-08-17	Toshiba Corp	High-frequency heater

1990
- 1990-12-05 FR FR9015221A patent/FR2670273B1/fr not_active Expired - Fee Related
1991
- 1991-12-02 ES ES91120660T patent/ES2064028T3/es not_active Expired - Lifetime
- 1991-12-02 EP EP91120660A patent/EP0489383B1/de not_active Expired - Lifetime
- 1991-12-02 AT AT91120660T patent/ATE113155T1/de not_active IP Right Cessation
- 1991-12-02 DE DE69104697T patent/DE69104697T2/de not_active Expired - Fee Related
- 1991-12-03 KR KR1019910022031A patent/KR100220255B1/ko not_active Expired - Fee Related
- 1991-12-04 PT PT99682A patent/PT99682B/pt not_active IP Right Cessation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0609161A1 (de) *	1993-01-29	1994-08-03	Eaton Controls S.A.	Steuerschalter für Kombinierter Mikrowellen- und Grillofen
FR2701094A1 (fr) *	1993-01-29	1994-08-05	Eaton Controls Sa	Commande de four électrique à micro-ondes avec gril incorporé.
EP0750445A3 (de) *	1995-06-23	1997-01-02	Daewoo Electronics Co., Ltd	Bedienungsschalter für Mikrowellenofen
US5728996A (en) *	1995-06-23	1998-03-17	Daewoo Electronics Co., Ltd.	Operational switch for a microwave oven
EP0756440A1 (de) *	1995-07-26	1997-01-29	Daewoo Electronics Co., Ltd	Vorrichtung zum Steuern der Leistung eines Mikrowellenofens

Also Published As

Publication number	Publication date
PT99682B (pt)	1999-02-26
KR920012824A (ko)	1992-07-27
FR2670273B1 (fr)	1998-03-06
PT99682A (pt)	1994-01-31
DE69104697D1 (de)	1994-11-24
KR100220255B1 (ko)	1999-09-15
ES2064028T3 (es)	1995-01-16
EP0489383B1 (de)	1994-10-19
EP0489383A3 (en)	1992-09-30
DE69104697T2 (de)	1995-03-16
ATE113155T1 (de)	1994-11-15
FR2670273A1 (fr)	1992-06-12

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