Abstract: An artificial intelligence based harmful environment control system includes: a plurality of IoT sensors measuring a harmful element and an environmental element of a closed space, and whether there is a person in the closed space; a controller unit controlling to display a harmful element measurement value and an environmental element measurement value provided from the plurality of IoT sensors, comparing the harmful element measurement value with a reference range measurement value, deciding a control method corresponding to the determined harmful environment situation, selecting and controlling to output a guidance message corresponding to the harmful environment situation, and transmitting harmful element control information; a display panel displaying the harmful element measurement value and the environmental element measurement value, and displaying the guidance screen; a speaker voice-outputting the guidance message according to the control of the controller unit; and a ventilation operating device op

Abstract: This invention is about Nano Bubble and Hydroxyl Radical Generator and has the following detail features; Air inlet part; Inlet pipe for inflowing liquid connected to the above air inlet part; Pump connected to the above inlet pipe; Drive motor connected to the above pump; Rotating blade connected to drive axis of the above drive motor; Fixed blade connected to inside wall of the above pump, and arranged between the above rotating blade; The above rotating blade, the fixed blade or cylindrical blade surfaces of both blades are slanted in a direction. Therefore, this invention proposes Nano Bubble and Hydroxyl Radical Generator which increases dissolving rate of gas by accelerating finization and mix of air and liquid through inducing turbulence of air and liquid by way of constructing slant on surfaces of each blade.