Inlet valve with a shortened lifting lever and a method of shortening the lifting lever of the inlet valve

A method of shortening a lifting lever mechanism of an inlet valve, comprising:

• providing the inlet valve comprising
• a main body having defined therein compression hole and a waterway passage;
• a sealing pad;
• a float that surrounds the main body and is movable up and down around the main body;
• and
• the lifting lever mechanism that is rotatably connected to the main body of the inlet valve;
• and
• shortening the lifting lever mechanism by configuring a shortened lifting lever mechanism that comprises at least two stages of levers, that each have a fulcrum, respectively, and that include a first stage lever and a last stage lever that are connected in a driving way one by one,
• wherein the float is coupled to the first stage lever of the shortened lifting lever mechanism and forms a dynamic body to drive the shortened lifting lever mechanism to move,
• wherein the sealing pad is assembled to the last stage lever of the shortened lifting lever mechanism, so that the sealing pad opens or closes the compression hole of the main body of the inlet valve when the float moves up and down to drive the shortened lifting lever to move, and
• wherein each of the lever stages of the at least two lever stages has a respective length of arm of force and a respective length of arm of resistance, and wherein the respective length of arm of force is longer than or equal to the respective length of arm of resistance, respectively, and
• wherein the first stage lever and the last stage lever are respectively rotatably connected to the main body of the inlet valve, the last stage lever is disposed between the first stage lever and the main body of the inlet valve, and the first stage lever is connected to the last stage lever in a driving way.