CONTROLLER FOR VENTILATION FAN

PURPOSE:To provide a controller for a ventilation fan which adjusts the output of a single phase induction motor which drives blades in accordance with airtightness degree in a room where a ventilation fan is installed and reduces the noise of the ventilation fan and minimizes its energy loss. CONST...

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Bibliographic Details
Main Authors SAKAHARA TAKASHI, WAKAI MASAO
Format Patent
LanguageEnglish
Published 11.01.1994
Edition5
Subjects
AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
RANGES
VENTILATING
WEAPONS
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Summary:PURPOSE:To provide a controller for a ventilation fan which adjusts the output of a single phase induction motor which drives blades in accordance with airtightness degree in a room where a ventilation fan is installed and reduces the noise of the ventilation fan and minimizes its energy loss. CONSTITUTION:There are installed a current detection circuit 9 which detects the output of a current detection device 8 which generates electromotive force in response to the electric current of a single phase induction motor, an output holding means 11 which holds the output of the single phase induction motor when the current detection device 8 detects the electric current which exceeds a setting value after the single phase induction motor is powered on and a specified time has elapsed and an output increase means 12 which raises the output of the single phase induction motor when the current detection device 8 detects currents less than the setting value.
Bibliography:Application Number: JP19920164523