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Patent Searching and Data


Title:
CONTROL DEVICE OF VENTILATING FAN
Document Type and Number:
Japanese Patent JPS62119339
Kind Code:
A
Abstract:

PURPOSE: To be able to eliminate self-generating-heat of a thermistor and measure temp. with high accuracy by installing a discharge circuit connected with an integrating circuit detecting ambient temp. and discharge electric charge from the integrating circuit and controlling temp. in digital value using a microcomputer.

CONSTITUTION: An integrating circuit 11 in a temp. detecting circuit 10 comprises a thermistor 11a and a capacitor 11b and the output electric potential level of the circuit 11 is detected by an electric potential level detecting circuit 13. Signal coming from the circuit 13 and corresponding to ambient temp. is introduced into a microprocessor 20, where this signal pulse is changed into digital form and compared with a reference temp. which is set in a digital value free from personal set error and on the basis of this result, the switching element in a ventilating drive circuit 30 is operated. As electric charge in the circuit 11 is discharged from a discharge circuit 12 connected with the circuit 11, the generated heat of the thermistor is eliminated.


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Inventors:
KAWASAKI MASAHIKO
Application Number:
JP1985000259000
Publication Date:
May 30, 1987
Filing Date:
November 19, 1985
Export Citation:
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Assignee:
MATSUSHITA SEIKO KK
International Classes:
F24F7/007; (IPC1-7): F24F7/007