The core working principle of the automatic winding filter device is to achieve continuous and uninterrupted air filtration through the automatic winding and replacement of filter materials, and to complete automated operation and maintenance in combination with differential pressure feedback control. The specific disassembly is as follows:
1. Basic filtration mechanism (consistent with conventional air filters)
When dusty air passes through the air inlet side of the device, the airflow passes through the filter material (usually non-woven fabric, glass fiber mat and other primary/medium efficiency filter materials). Dust particles are intercepted by the fibers of the filter material (interception mechanisms include: inertial collision, diffusion effect, direct interception, electrostatic adsorption, etc.). The filtered clean air is discharged from the air outlet side, completing the basic gas-solid separation.
2. Core automated winding drive system
The device is equipped with a built-in drum-type filter material assembly: The filter material is pre-wound on the “original drum” at the top of the device, and a “waste drum” is set at the bottom. One end of the filter material is fixed on the waste drum.
When dust accumulates on the surface of the filter material, the filtration resistance gradually increases, and the differential pressure sensor of the device will monitor the pressure difference between the air inlet surface and the air outlet surface in real time.
When the pressure difference reaches the preset “replacement threshold” (usually 200-300Pa, which can be adjusted according to the working conditions), the pressure difference sensor sends a signal to the control system, starting the motor to drive the waste drum to rotate.
When the waste drum rotates, the dirty filter material that has accumulated dust is pulled down from the original drum and wound for recycling. At the same time, the original drum releases new clean filter material, covering the entire filtration cross-section, thus completing the automatic replacement of the filter material.
3. Control and protection logic
Differential pressure control: The core trigger condition is the differential pressure threshold, which replaces manual judgment of the clogging degree of the filter material and ensures stable filtration efficiency.
Limit protection: The device is equipped with an internal limit switch or encoder. When the original roll of filter material is about to be exhausted, an alarm signal (audible and visual alarm or remote signal) is triggered to remind the maintenance personnel to replace the new roll of filter material.
Manual/Automatic switching: Supports manual start of winding (such as debugging, emergency handling), and can also achieve regular winding through timed control (assisted by differential pressure control) to prevent local clogging of the filter material.
Fan linkage (optional) : Some high-end models can be linked with the ventilation system fan. If the filter material is exhausted and not replaced in time, causing the pressure difference to exceed the standard, it will automatically trigger the fan to slow down or shut down for protection to prevent equipment overload.
4. Synergy of key components