Patent ID: 7468098

Claim:
A detachable filtering apparatus for an air conditioning system, comprising: a multi-aperture filter screen, having a rim fixing area and a filtering area; and a hollow circular frame fixedly coupled to said multi-aperture rim of said multi-aperture screen, said hollow circular frame having an outer frame whose size matches the inner edge of a specified installation cross sectional area of an air pipe of the air conditioning system; wherein the hollow circular frame is detachably installed at the specified installation cross sectional area and the center of the hollow circular frame is the air flowing area; wherein at the filtering area there is quaternary ammonium compound deposited on with the multi-aperture filter screen via chemical bonding, or when the quaternary ammonium compound is not reactive, the quaternary ammonium compound combines and attaches with the multi-aperture filter screen by an interface-linking method; wherein the fixing area is located at the detachable hollow circular frame at the vent of the air conditioning system, and the filtering area is installed on the center air flowing area of the hollow circular frame; wherein the hollow circular frame installed with the multi-aperture filter screen is implemented by tightly pressing the rim fixing area via the outer frame, or by a pasting method, a metal screen melting connecting method or a fastener fastening method, making the rim fixing area join with the hollow circular frame; wherein the detachable hollow circular frame installs the multi-aperture filter screen with a pressing method, a pasting method, a metal screen melting connecting method or a fastener fastening method, the compound reacts and the air at the vent flows to disinfect the air; wherein the quaternary ammonium compound attached at the filtering area reacts and the air at the vent flows to disinfect the air.