Multifunctional air gun

A multifunctional air gun, comprising:

• a tubular body provided with an on/off valve unit for controlling a supplying of compressed air from an air supply tube, said tubular body also having upper and lower openings communicating with each other;
• a fixed spool set within said upper opening of the tubular body, said fixed spool connecting the air supply tube to an air jet pipe while controlling a flowing direction of the compressed air;
• a vacuum valve unit set within said lower opening of the tubular body and assembled with an impurity suction nozzle and an impurity exhaust nozzle at both ends thereof while allowing the suction and exhaust nozzles to communicate with each other, said vacuum valve unit adapted for vacuumizing the interior of the two nozzles due to the compressed air supplied from the fixed spool;
• a first control knob assembled with said fixed spool and adapted for controlling the compressed air flowing from the fixed spool into the vacuum valve unit while controlling a suction force generated by the compressed air for the vacuum valve unit;
• and
• a second control knob assembled with said fixed spool and adapted for controlling the compressed air flowing from the spool into the air jet pipe while controlling a blowing force generated by the compressed air for the air jet pipe.