FAN UNIT Russian patent published in 2018 - IPC F04D29/28 

FIELD: ventilation.

SUBSTANCE: fan unit (10) includes a housing (20) with an inlet (70), an inlet (60) for the fan, and an outlet (80). The fan assembly further includes an impeller (30) and an electric motor (40). Air permeable resin barrier material protective grille (50) is located between the air inlet and the fan inlet to prevent users touch the impeller (30) and removed from the inlet (60) first distance (fan 54) and from the inlet (70) to air the second distance so that the filter (90) can be installed between the inlet (70) for air and breathable protective grille (50).

EFFECT: improved operation reliability.

10 cl, 7 dwg