The present invention relates to an eccentric rotor pump for pressure-feeding air. It is a new type air supply device provided for meeting the needs of works and overhauls in the dusty and toxical pollutant environments of cities, towns and countries. It can be used as an air source and can provide the fresh air for the individual worker or operator so as to meet the need of human respiration. The said invention consists of a volume-changeable double-chamber fluid pump and a set of contour follower mechanisms. It can continuously supply 0.5-3 kg/cm to the power 2 of the filtered, purified and oil-free air. The end of the air tube is connected with the positive pressure mask. |