Title:
FAULT DETECTING METHOD FOR TEMPERATURE REGULATOR
Document Type and Number:
Japanese Patent JPS5856006
Kind Code:
A
Abstract:
PURPOSE:To perform accurate fault detection even when ambient temperature is extremely low by comparing the output voltage of a temperature regulator with a reference voltage after electricity is fed for a certain time, and then deciding on a fault of the temperature regulator when the output voltage is higher than the reference voltage. CONSTITUTION:A heater 3 for heat cooking is installed in the heating chamber 2 of cooking apparatus 2, and a thermistor 4 measures the temperature in the chamber 2. Then, an LSI18 compares the output voltage VTH of the thermistor 4 with a reference voltage V0 by the output signal of a delay circuit 12 a prescribed time after the heating of the cooking apparatus 12 is started. When VTHV0, on the other hand, the thermistor 4 increases in resistance value abnormally, thereby deciding that the breaking of wire occurs to the thermistor.
Inventors:
TATEDA KOUICHI
Application Number:
JP15595381A
Publication Date:
April 02, 1983
Filing Date:
September 29, 1981
Export Citation:
Assignee:
SHARP KK
International Classes:
G05B23/02; G05D23/19; G05D23/24; (IPC1-7): G05B23/02; G05D23/19
Domestic Patent References:
| JPS5481530A | 1979-06-29 |
Attorney, Agent or Firm:
Takeshi Sugiyama