EP0237097B1 - Four à micro-ondes muni de moyens de contrôle réduisant les risques de fonctionnement sans charge - Google Patents

Four à micro-ondes muni de moyens de contrôle réduisant les risques de fonctionnement sans charge Download PDF

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Publication number
EP0237097B1
EP0237097B1 EP87200284A EP87200284A EP0237097B1 EP 0237097 B1 EP0237097 B1 EP 0237097B1 EP 87200284 A EP87200284 A EP 87200284A EP 87200284 A EP87200284 A EP 87200284A EP 0237097 B1 EP0237097 B1 EP 0237097B1
Authority
EP
European Patent Office
Prior art keywords
oven
door
control means
microwave
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
Application number
EP87200284A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0237097A1 (fr
Inventor
Jean-Pierre Hazan
Michel Steers
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.)
Laboratoires dElectronique Philips SAS
Koninklijke Philips NV
Original Assignee
Laboratoires dElectronique Philips SAS
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Laboratoires dElectronique Philips SAS, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Laboratoires dElectronique Philips SAS
Publication of EP0237097A1 publication Critical patent/EP0237097A1/fr
Application granted granted Critical
Publication of EP0237097B1 publication Critical patent/EP0237097B1/fr
Anticipated expiration legal-status Critical
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
    • H05B6/6414—Aspects relating to the door of the microwave heating apparatus
    • H05B6/6417—Door interlocks of the microwave heating apparatus and related circuits

Definitions

  • the invention relates to a microwave oven provided with control means reducing the risks of load-free operation which, from the opening and closing states of the oven door, act on a control which activates a magnetron. using feeding means.
  • the microwave oven is provided with a door switch which opens or closes depending on whether the oven door is open or closed.
  • This document describes control means which first detect that this door switch is closed, then in the course of a following sequence, during which the user must introduce the load, detects whether this sequence consists of an opening then closing the oven door.
  • control means for this consist of a microprocessor whose program execution, which implements the previous sequence, is controlled by the door switch.
  • the object of the invention is to provide a device simple, robust and reliable which does not require an individual power supply and resistant well to disturbances linked to heat, cooking vapors and electromagnetic parasites specific to this kind of oven.
  • control means consist of an electromechanical rocker device which reacts to door closings by memorizing their number and allows the magnetron to start up after a even number of door closings, with an operating cycle of the electromechanical rocker device consisting of two opening states and two door closing states.
  • the electromechanical rocking device can consist of an erasing lever which actuates a switch of the electric pear type.
  • it can consist of an erasure switch which actuates a remote control switch.
  • Figure 1 is shown schematically a cam 20 disposed on the door 21 of the oven. This by its opening-closing movement will cause the cam 20 to move in the respective directions B and A, considering this displacement only over a short distance, at the level of an erasing lever 10.
  • the latter comprises a first branch 11 movable in one direction and a second movable branch 12 articulated around a joint 13.
  • the movable branch 12 can move in the two directions A and B shown by the double arrow according to a rotation around the articulation 13.
  • the movable branch 12 is driven by the cam 20 and comes to be placed in a position close to the extension of the branch 11 so that it escapes the action of the cam 20 .
  • the movable branch 12 When the movable branch 12 has escaped the action of the cam 20, it is urged by a restoring force, consisting for example of a spring, which returns the movable branch 12 so that it makes a certain angle with the branch 11, for example close to 90 °.
  • a restoring force consisting for example of a spring
  • the branch 11 presses an electric pear-type switch.
  • This consists, in its essential elements, of a cap 16 freely mounted on an axis 17 movable in translation along its own axis of symmetry and provided with a restoring force.
  • This axis 17 will cause a jumper 18 to pivot, by means of a lug 23, around a friction axis 19 in two stable positions.
  • the rider 18 has a tip 22 so that the lug 23 will be able to be guided alternately on either side of the tip 22 each time the axis 17 is pressed towards the rider 18.
  • Each branch of the rider 18 must thus alternatively be in contact with a base 24, formed of two parts electrically insulated by an insulator 25, the base being secured to a rigid fixed part 15 of the oven. An electrical connection is then made between the jumper 18, the magnetron control electronics 26, all of the usual on-off switches 27 for general starting and safety and part of the base.
  • a complete cycle will consist of the following sequence.
  • the cam 20 passes for the first time in direction B and puts the jumper in the position shown in FIG. 1.
  • the branch 12 disappears and does not modify the position of the jumper.
  • the cam 20 goes back in the direction B which causes the jumper 18 to switch into the position opposite to that of FIG. 1.
  • the return of the cam does not modify the position of the jumper.
  • the next passage of the cam 20 removes the jumper to the position in FIG. 1. It therefore takes two closing cycles to obtain the same configuration of the jumper.
  • the magnetron can only be put into operation every two closing cycles, which aims to awaken the attention of the user so that he loads the oven and does not operate it empty.
  • FIG. 2 represents a second embodiment of the invention.
  • the movable branch 12 of an erasure switch 30 operates in the same manner as above. It cooperates with the cam 20 of the door 21 according to exactly the same mechanism as before during the movements in the directions A and B. During these movements of the movable branch 12 the electrical contact between the terminals 31 and 32 of the deletion switch 30 switches between the open and closed positions.
  • This erasure switch 30 thus controls a remote control switch 33 which switches under the action of the electrical pulses appearing at the terminals 34, 35 caused by the closing of the contact 31, 32.
  • This remote control switch is combined with the magnetron control electronics 26 and a general on-off switch 27. The remote control switch must receive two pulses to be in the same situation again. Therefore, as in the previous embodiment, the magnetron can only be put into operation every two closing cycles of the oven door.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
EP87200284A 1986-02-28 1987-02-20 Four à micro-ondes muni de moyens de contrôle réduisant les risques de fonctionnement sans charge Expired - Lifetime EP0237097B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8602821 1986-02-28
FR8602821A FR2595179B1 (fr) 1986-02-28 1986-02-28 Four a micro-ondes muni de moyens de controle reduisant les risques de fonctionnement sans charge

Publications (2)

Publication Number Publication Date
EP0237097A1 EP0237097A1 (fr) 1987-09-16
EP0237097B1 true EP0237097B1 (fr) 1991-12-27

Family

ID=9332641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87200284A Expired - Lifetime EP0237097B1 (fr) 1986-02-28 1987-02-20 Four à micro-ondes muni de moyens de contrôle réduisant les risques de fonctionnement sans charge

Country Status (5)

Country Link
US (1) US4713514A (enrdf_load_stackoverflow)
EP (1) EP0237097B1 (enrdf_load_stackoverflow)
JP (1) JPH0343678Y2 (enrdf_load_stackoverflow)
DE (1) DE3775432D1 (enrdf_load_stackoverflow)
FR (1) FR2595179B1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471114A (en) 1982-12-30 1984-09-11 Union Carbide Corporation Separation of mannose by selective adsorption on zeolitic molecular sieves
US9089319B2 (en) 2010-07-22 2015-07-28 Plasma Surgical Investments Limited Volumetrically oscillating plasma flows

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE514459C (de) * 1930-12-13 Franz Benndorf Vorrichtung zum Umsetzen jedes zweiten Hubes einer geradlinigen Hin- und Herbewegung in eine hin oder her schwenkende Bewegung
DE1765354B1 (de) * 1968-05-04 1971-04-15 Marquardt J & J Schnappschalter mit drehbarem betaetigungsglied
BE788731A (fr) * 1971-07-15 1973-03-13 Int Standard Electric Corp Systeme d'entree de donnees pour machine electrique
FR2163355A1 (enrdf_load_stackoverflow) * 1971-12-15 1973-07-27 Gouzien Alain
US3789173A (en) * 1972-12-07 1974-01-29 Illinois Tool Works Alternate action switch convertible to momentary by putting latch on different pivot
SE391391B (sv) * 1975-06-12 1977-02-14 Philips Svenska Ab Sekerhetsanordning vid mikrovagsugn innefattande en av ugnsdorren styrd strombrytare
US4101750A (en) * 1977-05-31 1978-07-18 Whirlpool Corporation Door interlock system for microwave oven
JPS59198620A (ja) * 1983-04-26 1984-11-10 シャープ株式会社 調理器のスイツチ機構
JPS59228393A (ja) * 1983-06-10 1984-12-21 株式会社東芝 調理器
DE3345994A1 (de) * 1983-12-20 1985-06-27 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Mikrowellenofen

Also Published As

Publication number Publication date
FR2595179B1 (fr) 1988-05-06
EP0237097A1 (fr) 1987-09-16
DE3775432D1 (de) 1992-02-06
JPH0343678Y2 (enrdf_load_stackoverflow) 1991-09-12
FR2595179A1 (fr) 1987-09-04
US4713514A (en) 1987-12-15
JPS62142195U (enrdf_load_stackoverflow) 1987-09-08

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