Automatic method to display sooty smoke degree because is variable according to room sooty smoke density

摘要

PURPOSE: A method for automatically variably displaying smoke density depending on indoor smoke density is provided to allow appropriate ventilation depending on density of smoke in a room. CONSTITUTION: A method comprises the steps of: a step in which a CPU is supplied with power through a calculation unit when an input power is connected; a step in which the CPU switches on/off a smoke sensor installed on an indoor wall, a television or a desk; a step in which the CPU receives signal from the smoke sensor to transmit to a contact-less switch; and a step in which the contact-less switch switches LED's to display density of smoke in the room. The calculation unit turns on a red light when the smoke sensor senses large amount of smoke. The calculation unit turns on a green light when the smoke sensor senses that air is circulated and cleaned.