Aperture-adjustable nozzle structure and adjusting method

The invention discloses a nozzle structure with an adjustable caliber and an adjusting method, the nozzle structure is composed of a shell, an inner core, an inlet, a rotational flow cavity, an outlet, a flow dividing hole, a rotational flow groove, an elastic piece and a sliding lever, the nozzle structure has a large caliber mode and a small caliber mode, and snow making can be carried out by adjusting the caliber of the outlet of the nozzle and controlling the atomization effect. The smaller the atomization particle size is, the less the water drop freezing heat exchange amount is, the heat exchange specific surface area is larger, and the heat exchange rate is higher. When the environment temperature and humidity are low, the large-caliber mode is switched; when the environment temperature and humidity are high, the small-caliber mode is switched, it is guaranteed that water drops are frozen before falling to the ground, and the snow forming quality is improved. Meanwhile, the snow density can be changed