Title:
TEMPERATURE CONTROLLER
Document Type and Number:
Japanese Patent JPS5822422
Kind Code:
A
Abstract:
PURPOSE:To use a temperature controller effectively for an electric foot-warmer frame, by comparing the control voltage of a voltage-controlled oscillator with the signal voltage of a temperature sensor, and holding the temperature of a heating body constant on the basis of comparison output. CONSTITUTION:A temperature sensor 17, such as a thermistor, for measuring the temperature of a heating body 20, an electric heating control oscillator 1, etc., are provided inside of a foot-warmer frame 21, and the resonating circuit consisting of a coil 4 and a capacitor 5 is provided to a table 22. For this purpose, the operation part of the table 22 is operated to vary the resonance frequency of the resonating circuit, and thus the control voltage of the oscillator 1 is varied to vary the oscillation frequency of the oscillator 1, thereby varying the set temperature of the heating body 20. A comparator 18 compares the control voltage of the oscillator 1 with the signal voltage of the temperature sensor 17, and on the basis of the output signal of the comparator 18, the heating body 20 is controlled to a prescribed temperature.
Inventors:
KURIYAMA TAKESHI
IKEHARA TAKASHI
MIYAHARA TAKASHI
KURITA AKIRA
IKEHARA TAKASHI
MIYAHARA TAKASHI
KURITA AKIRA
Application Number:
JP12110481A
Publication Date:
February 09, 1983
Filing Date:
August 01, 1981
Export Citation:
Assignee:
SHARP KK
International Classes:
G05D23/19; G05D23/24; (IPC1-7): G05D23/19
Attorney, Agent or Firm:
Sugiyama Takeshi