Title:
CONTROLLER FOR GAS COOKER
Document Type and Number:
Japanese Patent JP3804103
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a controller for a gas cooker in which even with any failure erroneous judgement of a combustion state is eliminated, and a switch operation is recognized on a safety side for ensurance of safety.
SOLUTION: AC voltage of an AC power supply 1 is applied to a flame rod 2 for sensing a flame and is opened and closed with a phototriac 10. Upon combustion a pulse shaped flame rod current 7 flows through the flame rod 2 via a flame which is converted to a pulse shape combustion detection voltage signal 8 with a field effect transistor 3 and is inputted into a microcomputer 6. The combustion detection voltage signal 8 and the waveform of a switching pulse 9 for driving the triac 10 are compared, and if they are same phase, then it is judged that the state is a combustion state while if 0 volt level, then it is judged the state is a non-combustion state. In this case, when the field effect transistor 8 is opened and troubled after the detection of combustion, voltage of a drain 4 becomes a constant level of DC 5V so that the failure can be judged for discrimination of the combustion state and the trouble state.
Inventors:
Kazuyoshi Hatano
Hiroyuki Senda
Akamatsu Yoshio
Hiroyuki Senda
Akamatsu Yoshio
Application Number:
JP14249796A
Publication Date:
August 02, 2006
Filing Date:
June 05, 1996
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
F23N5/24; F24C3/12; F23N5/12; (IPC1-7): F24C3/12; F23N5/12; F23N5/24
Domestic Patent References:
| JP8145349A | ||||
| JP4068216A |
Attorney, Agent or Firm:
Fumio Iwahashi
Hiroki Naito
Daisuke Nagano
Hiroki Naito
Daisuke Nagano
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