Patent ID: 7993517

Claim:
An automatically cleaned filter, comprising: a motor having a spindle; a base at an upper side of the motor; the base being formed with at least one filter seat, a water inlet, a water draining hole and an annular groove; at least one filter core installed on a respective one of the at least one filter seat; the filtering material being formed on an outer side of the filter core; a cleaning unit installed on a center portion of the base; a bottom of the cleaning unit being connected to the spindle; a gear being installed at an upper side of the base and being engaged to the spindle; an upper cover combined to the base by using at least one supporting post for fixing the filter core and the cleaning unit; a lower side of each filter core being installed with a gear; the gear at the lower side of the filter core being engaged to the gear; an outer cover combined to the base by using at least one retaining post and being at an upper side of the upper cover; the outer cover being formed with an air valve; a water outlet and an engaging groove which is formed at a lower side of the outer cover; and an outer casing embedded to the annular groove of the base and the engaging groove of the outer cover so as to form a casing for containing the filter core and the cleaning unit.