The water enters from the inlet, passes through the coarse filter screen to filter out the impurities with larger particles, and then reaches the fine filter screen. In the process of filtration, the fine filter gradually accumulates the dirt and impurities in the water, forming a filtering impurity layer. As the impurity layer accumulates on the inside of the fine filter screen, a differential pressure is formed on both sides of the fine filter screen. When the pressure difference of the filter reaches the preset value of the filter, the automatic cleaning process will start. During this period, the purified water supply is continuously flowing, the cleaning valve is opened, and the water pressure in the cleaning room and the dirt suction device drops greatly. Through the pressure difference between the filter cartridge and the suction pipe, a suction force is generated between the suction pipe and the cleaning room through the suction nozzle, forming a pollution absorption process.

At the same time, the electric motor of the filter drives the suction pipe to spiral along the axial direction. The combination of axial movement and rotary movement of the suction device will clean the inner surface of the whole filter screen. The whole washing process takes tens of seconds. The drain valve is closed at the end of cleaning. The filter begins to prepare for the next flushing cycle.

The water to be treated enters the machine body through the water inlet, and the impurities in the water deposit on the stainless steel filter net, resulting in pressure difference. The differential pressure switch is used to monitor the change of pressure difference at the inlet and outlet. When the pressure difference reaches the set value, the electric controller sends signals to the hydraulic control valve and the driving motor, causing the following actions: the motor drives the brush to rotate, cleans the filter element, and the control valve opens for blowdown. The whole cleaning process lasts for tens of seconds. When the cleaning is finished, the control valve is closed and the motor stops rotating The system returns to its initial state and starts to enter the next filtration process.

After the installation of the equipment, the personnel shall carry out debugging, set the filtering time and cleaning conversion time, the water to be treated enters the body through the water inlet, and the filter starts to work normally. When the preset cleaning time is reached, the electric controller sends signals to the hydraulic control valve and the driving motor, causing the following actions: the motor drives the brush to rotate, cleans the filter element, and opens the control valve for sewage discharge The whole cleaning process takes tens of seconds. When the cleaning is finished, the control valve is closed, the motor stops rotating, and the system returns to its initial state, and the next filtration process begins.