Damp and frost preventing device of gas inflow filter elements of gas turbine and control method of damp and frost preventing device

The invention discloses a damp and frost preventing device of gas inflow filter elements of a gas turbine and a control method of the damp and frost preventing device. The damp and frost preventing device comprises a connecting pipe, a gas outflow pipe, heating nozzles, an electric check valve, a flow adjusting valve, a temperature and humidity sensor, the gas inflow filter elements, an external controller, a micro meteorological station and a gas inflow filter. The micro meteorological station is used for detecting the dry-bulb temperature and the relative humidity, a damp preventing manner or a frost preventing manner is selected according to values of the dry-bulb temperature and the relative humidity, the temperature and the relative humidity are constantly detected through the temperature and humidity sensor in the gas inflow filter, temperature and relative humidity signals are fed back to the external controller, the flow adjusting valve is automatically controlled through the external controller, the