AIR FLOW RATE CONTROL DEVICE Russian patent published in 2015 - IPC F24F11/00 

FIELD: ventilation.

SUBSTANCE: device contains the vertically arranged air duct housing with the end face hole, the valves and the petal punched orifices installed under the end face hole on vertical axes with the resetting mechanism. Under the air duct housing the hollow oval casing in the form of two bent branch pipes with two horizontally located windows facing towards mutually opposite sides and the common face hole is located. The valves are installed in casing windows with a possibility of rotation around axes. On the axes ends the bushings are located. Petal diaphragms are rigidly fixed under its lower face hole, on concentrically installed bushings, located on bushings of vertical axes of valves, oval bent branch pipes of the casing are fastened to the face hole of the housing with a possibility of change of tilt angle with reference to it, and the concentrically installed bushings are fixed to bushings of axes with a possibility of change of position of orifice petals in the horizontal plane.

EFFECT: expansion of scope of application, possibility of use both in exhaust, and in the input ventilation systems.

2 dwg