DEVICE FOR PRE-PURIFICATION OF AIR AND ELECTRICAL TOOL CONTAINING IT Russian patent published in 2021 - IPC B25F5/00 

FIELD: air purification.

SUBSTANCE: invention relates to a device for pre-purification of air and an electrical tool containing it. The device for pre-purification of air, in front of an input to electric engine (205) of electrical tool (100), has stator (2051) and rotor (2053) mounted on a shaft assembly with fan (207), made with the possibility of creating air flow (F) passing through electric engine (205), wherein electric engine (205) is located downstream in front of fan (207). The device contains cyclone separator (30) located in the path of air flow (F) in front of gap (G1) formed between stator (2051) and rotor (2053), or gap (G2) formed between electric engine (205) and case (10) of electrical tool (100), and containing at least one inlet air channel (301), cyclone separation chamber (303) communicating with inlet air channel (301), cyclone dust collection chamber (305), communicating with cyclone separation chamber (303) and located at the outer periphery of cyclone separation chamber (303), and outlet air channel (307) communicating with cyclone separation chamber (303) and located at the inner periphery of cyclone separation chamber (303), wherein electric engine (205) is located downstream of outlet air channel (307). Cyclone separator (30) located downstream in front of electric engine (205) allows air purified in a cyclone filter coming out of outlet air channel (307) of cyclone separator (30) to pass through electric engine (205).

EFFECT: obtaining a device for pre-purification of air.

17 cl, 7 dwg