Multifunctional filter valve

A multifunctional filter valve, comprising a valve body, a rotatable valve plate, a fixed valve plate, and a driving device;

• wherein the driving device is disposed on the valve body;
• an outer wall of the valve body is provided with a water inlet, a water outlet, and a drainage outlet;
• an inner chamber and an outer chamber are defined in the valve body, the inner chamber is coaxial with the outer chamber and is separated from the outer chamber in a radial direction of the valve body, and the outer chamber is in communication with the water inlet;
• the inner chamber defines a central drainage chamber, a working chamber, a backward washing chamber, and a blind chamber;
• the working chamber, the backward washing chamber, and the blind chamber are defined around the central drainage chamber;
• the central drainage chamber is in communication with the drainage outlet;
• and the backward washing chamber is in communication with the water outlet;
• a first filter element interface and a second filter element interface are coaxially defined at a bottom of the valve body;
• the first filter element interface is in communication with the working chamber;
• and the second filter element interface is in communication with the backward washing chamber;
• a center of the rotatable valve plate is provided with a central blind hole;
• a water inlet through hole, a drainage blind hole in an annular sector shape, and a flow blocking part in an annular sector shape are distributed circumferentially around the central blind hole of the rotatable valve plate;
• the drainage blind hole and the flow blocking part are coaxial with the central blind hole;
• the central blind hole is in communication with the central drainage chamber;
• the drainage blind hole is in communication with the central blind hole;
• a central angle of the drainage blind hole is not greater than a central angle of the blind chamber;
• a central angle of the flow blocking part is equal to a central angle of the water inlet through hole, a central angle of the working chamber, and a central angle of the backward washing chamber;
• and
• the fixed valve plate is fixed at a top of the inner chamber, the rotatable valve plate is disposed on the fixed valve plate and is proximate to the driving device, and the driving device is configured to drive the rotatable valve plate to rotate to cooperate with the fixed valve plate;
• a central through hole is defined at a center of the fixed valve plate;
• a first through hole in an annular sector shape, a second through hole in an annular sector shape, and a blind plate in an annular sector shape are coaxially disposed around the central through hole;
• the central through hole is in communication with the central drainage chamber;
• the first through hole is communication with the first filter element interface;
• the second through hole is communication with the second filter element interface;
• a central angle of the blind plate is equal to the central angle of the blind chamber, and the blind plate is disposed to correspond to the blind chamber in position.