The filter element uses a high-strength wedge-shaped filter screen, and the filter element is automatically cleaned through pressure difference control and timing control. When impurities in the filter accumulate on the surface of the filter element, causing the inlet and outlet pressure difference to increase to the set value, or when the timer reaches the preset time, the electric control box sends a signal to drive the backwash mechanism. When the backwash suction cup mouth is directly opposite the filter element inlet, the drain valve is opened. At this time, the system is depressurized and drained. A negative pressure zone appears inside the suction cup and the filter element with a relative pressure lower than the water pressure outside the filter element, forcing part of the net circulating water to flow from the outside of the filter element. It flows into the inside of the filter element, and the impurity particles adsorbed on the inner wall of the filter element flow into the grate plate with the water and are discharged from the drain valve. The specially designed filter creates a jet effect inside the filter element, and any impurities will be washed away from the smooth inner wall. When the pressure difference between the inlet and outlet of the filter returns to normal or the timer setting time expires, the material does not flow during the entire process, and backwashing consumes less water, achieving continuous and automated production. Due to the low production concentration in the industry and the relatively high level of high-end products, The phenomena of low supporting R&D capabilities and low manufacturing technology level in the stainless steel filter industry still exist, and the import and export trade deficit continues to expand. The next few years will be a period of high-speed shock in the stainless steel filter industry. The direct consequence of this high-speed shock is the expansion of polarization in the brand camp. It is expected that there will definitely not be so many companies that can really survive in the market in the next few years. However, this high-speed shock in the stainless steel filter industry will bring huge opportunities, and the result of the shock will make the market operation more rational. The road to high-end localization is extremely bumpy. Basic parts have become a shortcoming restricting the high-end development of China's stainless steel filter manufacturing industry. During the 12th Five-Year Plan period, the government will continue to increase the localization of high-end stainless steel filter equipment parts.