| 摘要 |
PURPOSE: An automatic ventilation system for temperature, pollution level and humidity and a method of the same are provided to allow a ventilator to simultaneously sense temperature, pollution level and humidity of indoor temperature, and to be automatically actuated to ventilate when one of the values is over fixed value. CONSTITUTION: A ventilation system comprises a sensor circuit part including a temperature sensor circuit, a gas sensor circuit, a humidity sensor circuit; and an A/C control circuit part including a NAND(Not AND) gate, a photo coupler and a triac to connect power if one of electric signals output from the temperature sensor circuit, the gas sensor circuit and the humidity sensor circuit exceeds set value. The NAND gate receives electric signal from the sensor circuit part, and actuates a transistor(TR1) if one of temperature, pollution level and humidity exceeds the set value. The transistor actuates the photo coupler so that the triac is connected and driven so as to supply power to a plug control and actuate a ventilator.
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