Patent ID: 7409952

Claim:
A portable breathing apparatus comprising: a respirator ( 10 ) and a filter ( 20 ); the filter ( 20 ) having a hollow shell; a hole ( 21 ) defined in a front end of the hollow shell; a switch ( 22 ) provided below the hole ( 21 ); an opening ( 27 ) defined in a rear end of the hollow shell; a tube ( 11 ) inserted in the opening ( 27 ) and connected to the respirator ( 10 ); a multifunctional strainer ( 23 ), a photocatalyst element ( 24 ) and an exhauster ( 25 ) provided in the hollow shell in turn, and the photocatalyst element ( 24 ) having two photocatalyst pieces ( 241 , 243 ) and an ultraviolet light ( 242 ) which is provided between the two photocatalyst pieces ( 241 , 243 ) for first sterilization; a circuit card ( 28 ) and a battery unit ( 29 ) respectively mounted on a lower end of the hollow shell; the multifunctional strainer ( 23 ) mounted adjacent the hole ( 21 ) and the exhauster ( 25 ) mounted adjacent to the opening ( 27 ); and a high-pressure generator ( 26 ) and an active carbon net ( 30 ) are provided between the opening ( 27 ) and the exhauster ( 25 ), the high-pressure generator ( 26 ) being capable of generating ozone and negative ions for filtration and second sterilization.