An energy-independent water-based pure air cleaning system using a water electrolytic-fuel cell is disclosed. The energy-independent water-based pure air cleaning system using a water electrolytic-fuel cell proposed by the present invention comprises: a water electrolysis unit that generates hydrogen and oxygen through a water electrolysis treatment using supplied water, and supplies hydrogen gas to an energy generating unit by adjusting the pressure of the generated hydrogen gas; the energy generating unit that generates electrical energy on the basis of the hydrogen gas supplied for use as a power source for air purification; an energy storage unit that does not need energy charging and supplies the generated electrical energy as power for air purification; an oxygen exhaust port for discharging the oxygen generated in the water electrolysis unit for air purification; and a humidifier that generates water vapor by spraying or evaporating the supplied water by any one of ultrasonic vibration, heating, natural evaporation, or nozzles to control the humidity in a room.

An energy-independent water-based pure air cleaning system using a water electrolytic-fuel cell is disclosed. The energy-independent water-based pure air cleaning system using a water electrolytic-fuel cell proposed by the present invention comprises: a water electrolysis unit that generates hydrogen and oxygen through a water electrolysis treatment using supplied water, and supplies hydrogen gas to an energy generating unit by adjusting the pressure of the generated hydrogen gas; the energy generating unit that generates electrical energy on the basis of the hydrogen gas supplied for use as a power source for air purification; an energy storage unit that does not need energy charging and supplies the generated electrical energy as power for air purification; an oxygen exhaust port for discharging the oxygen generated in the water electrolysis unit for air purification; and a humidifier that generates water vapor by spraying or evaporating the supplied water by any one of ultrasonic vibration, heating, natural evaporation, or nozzles to control the humidity in a room.

A method for maintaining a boiling rate of a base fluid can include a determination of a fluid level of a turbulated base fluid in a reservoir. The fluid level can be determined by measuring at least one first height of the turbulated base fluid above the fluid level with at least a first sensor. The fluid level can be determined by measuring at least one second height of the turbulated base fluid below the fluid level with the first sensor. The method can include the establishment of the fluid level of the turbulated base fluid. The fluid level can be established according to the measured at least one first and second heights. The method can include the graduated introduction of an input fluid into the reservoir. A control valve can gradually introduce the input fluid in proportion to the established fluid level of the turbulated base fluid.

An example of an apparatus is provided. The apparatus includes a build material transport path to transport a build material with air flow. The apparatus includes a humidifying element to receive the air flow and to add moisture to the air flow. The apparatus includes an inlet to introduce ambient air into the build material transport path to decrease moisture content in the air flow. The apparatus includes a valve to connect the humidifying element and the inlet to the build material transport path. The valve is to adjust an amount of ambient air introduced into the build material transport path. The apparatus includes a sensor to detect the moisture content in the air flow and to generate a signal to indicate the moisture content. The apparatus includes a processor to receive the signal to control the valve to maintain a moisture content in the air flow.

A humidifier apparatus may have at least one reservoir configured for holding a liquid. At least one device is for creating vapour from the liquid. At least one ventilator may cause a movement of the vapour exiting the reservoir. One or more light sources project lights on the movement of vapour. A method for operating a humidifier apparatus and creating flame-like vapor.

A humidifier apparatus may have at least one reservoir configured for holding a liquid. At least one device is for creating vapour from the liquid. At least one ventilator may cause a movement of the vapour exiting the reservoir. One or more light sources project lights on the movement of vapour. A method for operating a humidifier apparatus and creating flame-like vapor.

An air disinfector and humidifier combo is revealed. The air disinfector and humidifier combo includes a tank used for storing water and provided with an air outlet, an electrolytic oxygen generator arranged at the tank for hydrolysis of water in the tank to generate ozone water, an ultrasonic oscillator disposed on the tank for atomizing the ozone water in the tank to produce ozone water mist, an air pump, a bubble refiner connected to an air vent of the air pump and mounted in the tank for generating submicron bubbles, and an electronic control unit electrically connected to the electrolytic oxygen generator, the ultrasonic oscillator, and the air pump for control of their operating time. The air disinfector and humidifier combo provides humidification, disinfection and purification functions. The submicron fine bubbles of the ozone water interact better with dirty air to improve disinfection and cleaning effect.

The invention relates to a method for viral disinfection of a defined space, having: diffusing, into the ambient air in the defined space, molecular ozone with an exposure dose CT that corresponds to the product of C × T, where C represents the concentration of molecular ozone and T represents the duration of treatment, said exposure dose CT being greater than 2 mg.min/m.sup.3, preferably substantially constant and equal to 5 mg.min/m.sup.3; and regulating the humidity level of the ozonized ambient air in the defined space.

The invention relates to a method for viral disinfection of a defined space, having: diffusing, into the ambient air in the defined space, molecular ozone with an exposure dose CT that corresponds to the product of C × T, where C represents the concentration of molecular ozone and T represents the duration of treatment, said exposure dose CT being greater than 2 mg.min/m.sup.3, preferably substantially constant and equal to 5 mg.min/m.sup.3; and regulating the humidity level of the ozonized ambient air in the defined space.

A humidity adjustment device (10) according to the present disclosure includes a control unit (11) that acquires humidity information indicating humidity of a space part of a manhole and controls the humidity on the basis of the humidity information.