초록 ▼

A flow regulator for air ducting comprises a flap which can be rotated about a shaft against the action of a spring, by the air current, to regulate air flow therepast. The flap has two portions which are disposed at an obtuse angle to each other about a bend line, one of the portions, in an open co

A flow regulator for air ducting comprises a flap which can be rotated about a shaft against the action of a spring, by the air current, to regulate air flow therepast. The flap has two portions which are disposed at an obtuse angle to each other about a bend line, one of the portions, in an open condition of the regulator, being directed downstream of the shaft generally parallel to the ducting axis, and is obliquely oriented in the closed condition and the other portion, in a closed condition of the regulator, is disposed in a plane lying at right angles to the ducting axis, and is obliquely oriented in the open condition. The obtuse angle of the flap portions is preferably of the order of 145°to 155°.

대표청구항 ▼

In an air ducting section, a flow regulator comprising a flap for varying the free ducting cross-section, a shaft mounted transversely in the ducting section spaced from the central axis thereof by 1 to 4% of the ducting diameter, said flap being mounted on said shaft for rotation about the shaft ax

In an air ducting section, a flow regulator comprising a flap for varying the free ducting cross-section, a shaft mounted transversely in the ducting section spaced from the central axis thereof by 1 to 4% of the ducting diameter, said flap being mounted on said shaft for rotation about the shaft axis to vary the free ducting cross-section, said flap comprising first and second portions obtusely angled relative to each other along a straight axial bend line closely adjacent and parallel to said shaft such that the two portions stand at an angle of 135°to 160°in relation to one another, said ducting section having an air inlet end and an air outlet end defining the direction of air flow therethrough, means defining an open position and a closed position for said flap, said first and second portions being angled relative to each other such that in the open position of said flap the first portion is directed downstream from said shaft generally parallel to the direction of air flow and the second portion is directed obliquely upstream, and in the closed position said second portion is directed substantially perpendicular to the ducting axis and said first portion is directed obliquely downstream, whereby air flow against said second portion biases said flap toward the closed position, and spring means continuously biasing said flap toward the open position.