Method for controlling draught fan, and draught fan device

A draught fan device, comprising a draught fan, a memory, a processor, and a computer program stored in the memory and executable by the processor;

• wherein the processor is configured to implement, when executing the computer program, cause the processor to:
• obtain an actual rotating speed, an actual power, and a target air volume of the draught fan;
• obtain a target power corresponding to the target air volume according to the actual rotating speed and the target air volume;
• obtain, in response to a power difference value between the actual power and the target power being not within an initial difference value range, a control duration and a rotating speed step size corresponding to the power difference value, and
• adjusting actual rotating speed according to the rotating speed step size, after the control duration.

A non-transitory computer-readable storage medium, which stores a computer program, that, when executed by a processor of a draught fan device, causes the processor of the draught fan device to:

• obtain an actual rotating speed, an actual power, and a target air volume of the draught fan;
• obtain a target power corresponding to the target air volume according to the actual rotating speed and the target air volume;
• obtain, in response to a power difference value between the actual power and the target power being not within an initial difference value range, a control duration and a rotating speed step size corresponding to the power difference value;
• and
• adjust the actual rotating speed according to the rotating speed step size, after the control duration.