| 摘要 |
PROBLEM TO BE SOLVED: To provide a solar battery type ventilating device not storing enormous quantity of data relating to sunset and sunrise, dispensing with cumbersome input of data such as date and latitude and longitude of installation place by an installation personnel, and further not increasing a circuit such as a humidity sensor in case of rainy and cloudy weather of high humidity, in the ventilating device capable of coping with the stop control in low intensity of illumination such as nighttime stop and sudden raining, and being started and stopped at a desired time. SOLUTION: This ventilating device applying the solar battery as a power source, has a function for measuring the intensity of illumination by measuring and converting output voltage, short-circuit current and the like, monitors the illumination data of 24 hours by further mounting a backup power source, the approximate timing of sunset and sunrise is estimated on the basis of the comparison of numerical values of the acquired illumination data, to be applied as a base time, and the time is indicated by the difference from the base time to perform the control on the basis of the time. COPYRIGHT: (C)2006,JPO&NCIPI
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