Patent ID: 8425283

Claim:
A ventilating air intake arrangement comprising: a structure comprising at least one air passage channel, including an air vent having an air intake edge, to ventilate at least one confined zone in an aircraft with fresh air entering upstream, through said air vent, into said air passage channel and exiting downstream of the air passage channel towards said confined zone to be ventilated, and a controllable blocking device that is configured to vary the cross section of said air passage channel, wherein: said controllable blocking device comprises at least one membrane disposed at least partially in said air passage channel, elastically deformable under the action of a fluid control device, to vary the cross section of said air passage channel according to the speed and the altitude of said aircraft, and said fluid control device comprises a link pipe, having an upstream end, a downstream end, and an open continuous path between said upstream end and said downstream end, said upstream end takes total pressure of the air entering through said air intake edge of the air vent and said downstream end of said link pipe applies said total pressure on said membrane so that said total pressure acts directly on said membrane for varying the cross section of said air passage channel.