Dryer water shortage control method and device, dryer and storage medium

The invention relates to the technical field of drying, and discloses a method for water shortage control of a dryer, which comprises the following steps: acquiring an absolute difference value of wet bulb temperatures of an upper shed and a lower shed; if the absolute difference value is greater than a first preset difference value, outputting a first warning prompt; if the absolute difference value is smaller than or equal to a first preset difference value, the real-time difference value of the dry-wet bulb temperature of an upper shed and the dry-wet bulb temperature of a lower shed in the drying room is obtained; and outputting a second warning prompt when the real-time difference value of the upper shed or/and the lower shed is smaller than a second preset difference value and larger than a third preset difference value. According to the method, the water shortage condition of the wet bulb temperature sensor can be found in time through judgment of two groups of parameters. The invention further disclos