Abstract: 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.

Abstract: The invention relates to a device (20) for adjusting a rate of flow of air flowing along an air duct, comprising: a tubular body (22) extending along an axis (24); at least one flap (28) able to pivot about an axis transverse to the axis (24) of the body (22); a ring (34) mounted to pivot on an end portion (22b) of the body (22) about the axis (24) of this body; each flap (28) being provided with a male drive means and the ring (34) 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 (34) being pivoted about the body (22), the male drive means engages with the female drive means to alter the position of each flap (28) and hence the cross section available for the passage of air.

Abstract: A method for diagnosing a single flow or dual flow ventilation unit, the method making it possible to diagnose the permeability and installation of each conduit of the ventilation unit by means of measuring devices and a control unit.

Abstract: The invention relates to a system and to a method for controlling an aircraft engine starter-generator. The system comprises a transmission box (20) with a fixed gear ratio intended to be mechanically coupled to a turbine shaft (12) of the engine to allow the latter to be started, a gearbox (40) with multiple gear ratios that is mechanically coupled to a pinion of the transmission box, a starter-generator (30) mechanically coupled to a pinion of the gearbox, and means for instigating a change in gear ratio of the gearbox according to the mode of operation of the starter-generator.

Abstract: Air-air heat exchanger (1) intended to be fitted to a room double-flow ventilation system comprising a plurality of plates (2) that are superposed to form a stack (3), each plate (2) comprising a plurality of flow channels forming a first air circulation volume (5) for a first air flow. The heat exchanger (1) further comprises spacer means designed to keep the plates (2) a distance apart so as to delimit a space (10) between two adjacent plates (2), these various spaces (10) between plates (2) forming an air circulation volume for a second air flow, first means for closing off the spaces (10) between the plates (2) at the two ends (6, 7) of the exchanger, second closing-off means (13), these second closing-off means (13) comprising, near the ends of the exchanger, two openings (20, 21), one for letting the second air flow in and the other for letting it out.

Abstract: The invention relates to a system and to a method for controlling an aircraft engine starter-generator. The system comprises a transmission box (20) with a fixed gear ratio intended to be mechanically coupled to a turbine shaft (12) of the engine to allow the latter to be started, a gearbox (40) with multiple gear ratios that is mechanically coupled to a pinion of the transmission box, a starter-generator (30) mechanically coupled to a pinion of the gearbox, and means for instigating a change in gear ratio of the gearbox according to the mode of operation of the starter-generator.

Abstract: The device (8) comprises a casing (10) defining an inner chamber (11) and having an inlet orifice (14) for fresh ventilation air (12), an inlet orifice (15) for recycled air (16), and blowing orifices (19) for blowing out air contained in the inner chamber, which are intended each to be connected to a reception room of the premises. Units (25) for heat-treating the air are each combined with a blowing orifice and are controlled independently of one another according to the setpoint temperature of the corresponding reception room. The method consists in feeding recycled air into the inner chamber only if that is necessary to achieve the setpoint temperature in a reception room, and in heat-treating the fresh ventilation air, and if appropriate the recycled air, independently room by room.

Abstract: The invention relates to a facility for producing sanitary hot water for congregate housing (1) that comprises a plurality of water heaters (2) each intended to equip a plurality of individual dwellings (2) in the housing (1). Each water heater includes a tank (3) containing a fluid to be heated, each dwelling (2) being further equipped with at least one air extraction duct (4), in particular in the technical rooms (5), connected to an air extraction network (8) that is common to the different dwellings (2). Each dwelling further includes a heat exchange means (10) adapted for exchanging heat between the extracted air flowing in the air extraction duct (4) and the fluid contained in the tank (3) so as to heat the fluid in order to produce sanitary hot water.

Abstract: The invention relates to a plant for producing sanitary hot water, that comprises a water heater including a tank (1) containing a fluid to be heated, and a controlled mechanical ventilation system (2) for extracting air from a dwelling, the controlled mechanical ventilation system (2) being coupled to a thermodynamic circuit (3) in which flows a coolant fluid, the thermodynamic circuit (3) including an evaporator (4) for exchanging heat with the extracted air, a compressor (6), an expander (8) and a condenser (7) for exchanging heat with the fluid contained in the tank (1). The ventilation system is equipped with a means for adjusting the flow of extracted air, e.g. based on hygrometry. The compressor (6) is a variable speed compressor capable of modifying the flow of the coolant fluid.

Abstract: The collar is embodied in the form of a single annular slotted piece (1) comprising a base body (2) and two ends (3, 4) provided with corresponding opposite toothings (7, 9) which are engageable into each other and each of which is provided with a row of teeth inclined in a direction opposite to the collar closing direction (F). An intermediate part of the base body (2) is corrugated in such a way that a hinge (10) is formed. A plurality of flexible tabs (11), which are inclined towards the hinge (10) and radially inwardly projected, is circumferentially distributed through a surface radially internal with respect to the base body (2). Said invention is suitable for connecting flexible or semi-flexible conduits single or double skinned, in particular for ventilation system air-conveying conduits.

Abstract: 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.

Abstract: 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.

Abstract: An installation for ventilation and heat treatment of air in a building including housing units having living and functional quarters is provided, the installation including an air blowing unit for blowing air taken from outside the building into the living quarters, an extraction unit for extracting air from the functional quarters, ducts communal to the building for conveying air to and extracting air from each housing unit, a blowing duct connected to each housing unit for conveying the blowing air, an extraction duct connected to each housing unit for conveying the extracting air, and an individual thermodynanic unit disposed on the housing unit at the connection of the blowing and extraction, where the blowing air and the extracting air passes over the thermodynamic unit, the thermodynamic unit including an evaporator disposed proximate the blowing flow and a condenser disposed proximate the extracting flow.

Abstract: The present invention is directed to an outlet for connecting a vacuum-cleaning hose to a centralized vacuum-cleaning installation. The outlet comprises a tubular body mounted in a surface of a fitted-out room at right angles to the surface and includes an open end which is plugged elastically and sealed by retractable member. The tubular body is connected by a member (e.g., pipe) to the vacuum cleaning unit, and the tubular body further includes a means of relaying control information for switching the unit on. At one end of a vacuum-cleaning hose is an end-fitting which is intended to be engaged in the tubular body. The end-fitting includes means for angularly positioning the end-fitting and means of fixing it in the tubular body at the end of its engagement travel therein. The end-fitting also includes an opening arranged opposite the pipe which is connected to the vaccuum-cleaning unit.

Abstract: The invention discloses a control device for an integrated suction cleaner unit (1) pneumatically connected to a system of tubes (13) which open, at their ends (13A), onto couplings (11) into which the mating end (9) of a hose (8) is inserted, the latter having at its other end (8A) a handle (5) onto which are fitted the cleaning accessories. The control device for the suction cleaning unit is of the type using acoustic transmission via the tube system (13) located between the suction cleaning unit (1) and the couplings (11) pressure wave detection (19, 23 and 28) for detecting specific acoustic pressure waves and controlling the suction cleaning unit (1).

Abstract: 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.