Working principle of dry steam jet humidifier SGZ dry steam jet humidifier uses external steam source, through the steam-water separation device, to ensure that dry steam is obtained, and the steam jet nozzle sprays uniform steam. The nozzle uses a double insulation jacket to preheat the nozzle to prevent the condensed water in the nozzle from spraying into the air conditioning system. The condensed water generated in the nozzle flows back to the flash chamber and becomes steam for humidification again through secondary evaporation. The separated condensed water is discharged through the steam trap at the bottom of the separator.