Patent ID: 7374366

Claim:
A wave generator comprising: a seat having an approximate U shape cross section; a top of the seat being formed with a flange; an inner wall of the seat being annularly arranged with a plurality of supporting blocks which are spaced one by one; a bottom of the seat being installed with a filter net; the filter net having a plurality of net holes; water flowing through the net holes; a positioning ring being a hollow annular structure; a lower side of the positioning ring being reduced inwards so as to resist against the supporting blocks of the seat; a wave generating unit being received in an upper side of the seat; the wave generating unit being formed by a flow-steady base and a flow-collecting mask; the flow-steady base having an approximate T shape and having a central platform; an upper surface of the central platform having a plurality of approximately V shape blocks which are annularly arranged; the spaces between the V shape blocks being formed as flow channels; an inner wall of the wave generating unit being formed with a plurality of longitudinal slots for draining water; the flow-collecting mask being placed upon an upper side of the flow-steady base; the flow-collecting mask having an inner wall and an outer wall enclosing the inner wall; an annular trench being formed between the inner wall and the outer wall; a center of the flow-collecting mask having a central post; an inner side of the inner wall of the flow-collecting mask being formed with a plurality of water slots corresponding to the flow channels of the flow-steady base; the number of the water slots being equal to that of the flow channels; an annular groove being formed between the central post and the plurality of water slots; an O ring encloses the central post; a positioning unit for positioning the flow-steady base and the flow-collecting mask precisely; and a filtering web having a plurality of holes which formed as an umbrella shape; a positioning rod extending from a central lower side of the web; a front end of the positioning rod being formed with an enlarged tapered head; a round neck being formed between the positioning rod and the head; a later side of the tapered head being formed with a slot; wherein as the positioning rod of the filtering web passes through the stepped hole of the central post, the tapered head can pass through the stop edge by the stop edge passing through the slot; then the tapered head resists against a lower end of the stop edge.