AIR SCREEN Russian patent published in 2009 - IPC F24F9/00 

FIELD: mechanics, heating.

SUBSTANCE: proposed screen is designed to protect the premises against an ingress, through wall openings, of air with temperature differing from of the premise and containing abnormal impurities. The proposed screen incorporates radial driven impeller arranged inside the screen box. Note here that air intake hole is made in on of the screen box lengthwise walls. Note also that width H of the screen box lengthwise wall with intake hole and that of opposite lengthwise wall makes 1.1 to 1.3 of the blower impeller diameter D. Mind that width L of the box other walls makes no more than 2.3 of the impeller outer diameter D. Note also that distance B between the impeller axis and the nearest box end face wall does not exceed the blower impeller OD D.

EFFECT: compact design with no less efficiency.

5 cl, 6 dwg