Views: 4 Author: Site Editor Publish Time: 2025-08-06 Origin: Site
The small fan inside the dehumidifier (usually an axial or centrifugal fan) plays a crucial role in the operation of the entire machine.
The main function of a small fan is to suck humid air from the room into the interior of the dehumidifier, and then return the dried air after dehumidification treatment to the room, achieving air circulation. This is the prerequisite for dehumidification.
In a commercial refrigerant dehumidifier, air is drawn in and passes through the evaporator (cooling) and condenser (heating):
A small fan helps air quickly pass through the evaporator, allowing moisture to condense into droplets at low temperatures.
Then raise the temperature through the condenser to prevent the discharged air from becoming too cold and maintain a stable room temperature.
The wind speed and volume of the fan will directly affect:
The speed of air passing through the cold exhaust.
Dehumidification capacity (how much moisture can be extracted per hour).
The rate at which the humidity in the room decreases.
A small fan can also help dissipate internal heat, avoiding damage to components such as compressors and motors due to high temperatures, and improving the service life of the entire machine.
When the humidity sensor detects an increase in indoor humidity, the small fan and compressor will start together to quickly process the moisture. After reaching the target humidity, the fan may continue to run for a short period to "exhaust" and prevent moisture residue.
Category | Specific Reason | Explanation |
Electrical Problems | Unstable power supply voltage or circuit disconnection | It may be due to an abnormal power supply, a power cord, or a control board malfunction |
Control board damaged | The motherboard cannot send a startup signal to the fan | |
The fan motor burned out | Fan motor damaged, coil open circuit or short circuit | |
Fan capacitor damaged | The starting capacitor is malfunctioning, causing an inability to start | |
Mechanical Problems | Fan shaft stuck | Long-term uncleaned, dust or rust, causing jamming |
The fan blade is stuck with foreign objects | Small insects, hair, plastic, and other foreign objects block the fan blades | |
Induction and Signal | The humidity has reached the target value, and the fan has stopped running | Some dehumidifiers automatically shut down the fan based on humidity |
Loose connection of the fan circuit | Loose wiring and loose connectors can also cause non-rotation |
