The water enters through the inlet and first filters out the impurities of the larger particles through the coarse filter and then reaches the fine filter. During the filtration process, the fine filter gradually accumulates dirt and impurities in the water to form a filter impurity layer. Since the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed on the inner and outer sides of the fine filter. .
When the pressure difference of the filter reaches the preset value of the filter, the automatic cleaning process will start. During this time, the clean water supply will continue to flow, the cleaning valve will open, the water pressure in the cleaning chamber and the suction device will drop greatly, and the filter cartridge will be sucked and sucked. The pressure difference between the pipe, the suction pipe and the cleaning chamber generates a suction force through the suction nozzle to form a suction process. At the same time, the filter electric motor drives the suction pipe to make a spiral motion in the axial direction.
The combination of axial and rotary motion of the suction cleaner completely cleans the entire inner surface of the screen. The entire flushing process takes only a few tens of seconds. The drain valve closes at the end of the wash. The filter begins to prepare for the next rinse cycle.