Aldes Aeraulique

Technofirst

Societe D'etudes Et De Recherche De Ventilation Et D'aeraulique

Patrick Damizet

Christian E Carme

Virginie Delemotte

Xavier Loigerot

Pierre Chaffois

Xavier Boulanger

Fabien Bertran

An adjustment device designed to adjust a flow rate of a fluid flowing in a duct, including a body in which an adjustment valve is mounted, movable in rotation about an adjustment axis, the body having an area upstream of the adjustment axis and a downstream area opposite to the upstream area with respect to the adjustment axis, where the adjustment axis is equipped with connecting means which cooperate with at least one first control member positioned in the downstream area and a second control member positioned in the upstream area.

Adjustable adjuster from a first end and a second end of the adjuster

The invention relates to a device () for adjusting a rate of flow of air flowing along an air duct, comprising: a tubular body () extending along an axis (); at least one flap () able to pivot about an axis transverse to the axis () of the body (); a ring () mounted to pivot on an end portion () of the body () about the axis () of this body; each flap () being provided with a male drive means and the ring () being provided with a female drive means, or vice versa, the male drive means and the female drive means being arranged in such a way that, in response to the ring () being pivoted about the body (), the male drive means engages with the female drive means to alter the position of each flap () and hence the cross section available for the passage of air.

Device for adjusting a rate of flow of air flowing along an air duct

The device for the active sound attenuation of a sound signal propagated in a duct comprises: at least first sensor means for a first sound signal, attenuation actuating means supplying an active sound attenuation signal in response to a selected control signal, an electronic control means generating the active sound attenuation signal for the actuating means. The first sensor means and the actuating means are arranged completely inside the duct opposite one another and at a selected distance from the casing of the duct, the axis of symmetry of the radiation of the actuating means and the axis of symmetry of the first sensor means are substantially parallel to the direction of propagation of the sound signal in the duct, and the actuating means are arranged upstream of the first sensor means in the direction of propagation of the sound signal in the duct.

Active sound attenuation device to be arranged inside a duct, particularly for the sound insulation of a ventilating and/or air conditioning system

A ventilation unit is provided comprising an electronically driven ventilator, mounted inside a casing wherein emerge several ducts connected to one or several rooms. Said unit further comprises orifices with specific cross-section, and a differential-pressure sensor measuring the difference in pressure between two predetermined points, said value being transmitted to an analysis and control device, which compares the differential pressure value to a reference value and controls the ventilator, such that it accelerates or slows down it rotational speed, so as to maintain the differential pressure constant and equal to the reference value, to maintain the desired flow rate at said orifices.

Electronically regulated self-controlled ventilation unit

This device has a housing 2, a motorized vacuum turbine 4 pneumatically connected to outlet 2b of a housing, and at least one tube 6 whose downstream end 6a terminates in housing 2, and structure 13, 40 connected to upstream end 6b of tube 6 capable of generating a temporary pneumatic pressure wave in the direction of its downstream end 6a. The latter is associated with structure 20, 22 for detecting the pressure wave and acting on module 23 for controlling the power to electric motor 3 of vacuum turbine 4 to start the system operating. The pneumatic pressure wave is conveyed by tube 6 itself from its upstream end 6b to its downstream end 6a, this downstream end being provided with a shutoff flap 18, normally held in the closed position and capable of causing the tube to be opened under the influence of the vacuum flow.

Growing community of inventors

Venissieux, France

Patrick Damizet