(19)
(11) EP 0 467 224 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.07.1992 Bulletin 1992/27

(43) Date of publication A2:
22.01.1992 Bulletin 1992/04

(21) Application number: 91111588.9

(22) Date of filing: 12.07.1991
(51) International Patent Classification (IPC)5: H05B 6/80, H05B 6/68
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 17.07.1990 JP 188953/90
17.07.1990 JP 188955/90
17.07.1990 JP 188956/90
18.07.1990 JP 191181/90
18.07.1990 JP 191182/90

(71) Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Kadoma-shi, Osaka-fu, 571 (JP)

(72) Inventors:
  • Yoshino, Koji, Takanohara Eki Nishi Danchi 4-406
    Soraku-gun, Kyoto-fu (JP)
  • Kashimoto, Takashi
    Nara-shi, Nara-ken (JP)
  • Yamaguchi, Kimiaki
    Nara-shi, Nara-ken (JP)
  • Yota, Masato
    Nara-shi, Nara-ken (JP)
  • Sakai, Shinichi
    Yamatokoriyama-shi, Nara-ken (JP)
  • Moriyama, Satomi
    Nara-shi, Nara-ken (JP)

(74) Representative: Eisenführ, Speiser & Partner 
Martinistrasse 24
28195 Bremen
28195 Bremen (DE)


(56) References cited: : 
   
       


    (54) High frequency heating apparatus and electromagnetic wave detector for use in high frequency heating apparatus


    (57) 57 A high frequency heating apparatus and an electromagnetic wave detector for use in the high frequency heating apparatus, which are so arranged to estimate the state of a food article placed in a heating chamber through detection of microwaves within the heating chamber. By devising a position of an antenna and a method of processing signals of the microwaves as detected, it becomes possible to effect detection of microwaves extremely stably and at high reliability.






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