Wave generator

A wave generator comprising:

• a seat;
• 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 seat;
• a wave generating unit 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 a central platform;
• an upper surface of the central platform having a plurality of projecting blocks which are annularly arranged;
• the spaces between projecting 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 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 has 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 enclosing the central post;
• a positioning unit for positioning the flow-steady base and the flow-collecting mask precisely;
• 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, as the positioning rod of the filtering web passes through the stepped hole of the central post;
• the tapered head will pass through a stop edge of the central post by the stop edge passing through the slot;
• and then the tapered head resists against a lower end of the stop edge.