Spray device, spray method, and mist space staging system

A mist space staging system comprising:

• a spray device which includes
• a two-fluid nozzle which sprays a mist obtained by mixing a liquid and a gas and atomizing the liquid,
• a spray-device-side gas flow path for supplying the gas to the two-fluid nozzle,
• a gas valve which opens or closes the spray-device-side gas flow path,
• a gas supply source which supplies the gas to the spray-device-side gas flow path,
• a spray-device-side liquid flow path which supplies the liquid to the two-fluid nozzle,
• a separately-provided solenoid liquid valve which opens or closes the spray-device-side liquid flow path,
• a liquid supply source that supplies the liquid to the spray-device-side liquid flow path,
• a liquid flow control valve which is provided in the spray-device-side liquid flow path between the two-fluid nozzle and the solenoid liquid valve to adjust a valve opening degree by a pulse signal, and controls a flow rate of the liquid in the spray-device-side liquid flow path, and
• a controller that controls the valve opening degree of the liquid flow control valve in multiple levels by the pulse signal from a console outside the spray device,
• the controller controls the valve opening degree of the liquid flow control valve in multiple levels to adjust the spray flow rate of the mist sprayed from the two-fluid nozzle in multiple levels and adjust the mist concentration in multiple levels,
• the controller performing control such that a pulse for driving the liquid flow control valve is corrected to be smaller than the received pulse signal in a case where the pulse signal received from the console changes from an increasing state to a decreasing state and the pulse for driving the liquid flow control valve is corrected to be larger than the received pulse signal in a case where the pulse signal received from the console changes from the decreasing state to the increasing state;
• and
• a staging device,
• wherein the controller adjusts the concentration of the mist in multiple levels in accordance with an output from the staging device.