Laminated filter filter is composed of a large number of surfaces with the outer (radial) shrinking the groove of the disk stack and pressed together, the upper and lower grooves intersect to form a number of intersections, but also the formation of A number of channels. When the water flow into the channel, the impurities in the water are intercepted at the intersections, that is, the different depth and number of grooves on the outer surface of the filter element determine the filtering accuracy of the filter unit.
When the pressure difference between the inside and outside of the laminated filter reaches a predetermined value, or when the set time is reached, the filter with self-cleaning function enters the backwash state. The controller turns on the electromagnetic head so that the pressure water source enters the backwashing valve chamber, the backwash valve closes the main water inlet channel and opens the outlet of the sewage outlet, so that the water flow at high pressure instantly becomes pressureless to change the water flow direction When the filter at the bottom of the one-way diaphragm to close the filter cavity, the filtered clean water into the filter cartridge in the nozzle channel, the nozzle channel pressure rise, the piston up
The spring overcomes the pressure on the laminations and releases the piston space at the top of the laminations. At the same time, water is jetted at high velocity from the nozzles above the four nozzle passages along the tangential direction of the laminations to spray on the surface of the laminations to rotate the laminations And evenly separated, the impurities trapped in the lamination sprayed thrown. 10- - After 30 seconds when backwashing is over
When the water flow direction changes again, the laminate is pressed again, the system re-enter the filter state.