FRESH AIR SUPPLY DEVICE Russian patent published in 2023 - IPC F24F13/06 

FIELD: ventilation and air conditioning.

SUBSTANCE: technical problem of the known devices for supplying fresh air is the complexity of the design. The objective of the invention is to create a design of the device for supplying fresh air with a more technologically advanced and simple design. In the device for supplying fresh air comprising an air duct with air outlet slots located along its length and overlapping them with the possibility of moving along the slots, two composite sectional screens with opposed holes are made, while the composite screens with opposed holes are made of two sections (1) configured for mechanical contact with each other, and one of the sections (2) in each of the two-section screens (1) is partially overlap the other section (3) and can move relative to the latter, and each section (2 and 3) along the length and along the opposite edges of the corresponding slot (4) is configured for mechanical contact with the wall of the air duct (5), in which the air outlet slots (4) are located and move relative to the opposite edges of the slots (4) with overlapping of the latter, and the total length of both sections (2 and 3) of each of the slots (4) exceeds the length of the corresponding slots (4), and the wall of the air duct (5), in which the slots (4) are located, is made flat and straight.

EFFECT: simplifying the design by eliminating the fixed section.

3 cl, 2 dwg