Abstract: The invention provides various designs of an apparatus and method for attemperating a gas stream temperature. The apparatus of the present invention provides a body through which a gas stream passes that permits, as desired, a second gas, such as gas outside of the gas duct or such as ambient air, to be added to the main gas stream to attemperate the temperature of the main gas stream. The body or device may be referred to as a variable eductor having a plurality of openings through which a second gas may pass into the main gas stream. The openings may be opened or closed, and the variable eductor provides control over which openings and the degree to which each opening is opened. In some designs the variable eductor is inserted between two portions of a gas duct. The variable eductor has widespread application, such as downstream of a gas turbine to attemperate the exhaust gas temperature during startup.

Abstract: A round or rectangular ceiling diffuser includes a blade. The blade includes a leading edge configured to face an incoming air flow and having an undulated contour extending along a closed-loop formed by the blade. The blade also includes a trailing edge opposite to the leading edge, where a width of the blade extends from the leading edge to the trailing edge and the undulated contour extends into and out of the width.

Abstract: 3-Cone Diffuser including a central cone (1), an intermediate cone (2) and outer cone or outer frame (3) placed one above the other in a spaced apart relationships having same vertical axis (14). The central cone (1) at the back is provided with bracket (8) spot welded or brazed or rivetted directly or via an intermediate plate to the central cone to hold the centre cone which is fixed on the intermediate cone with the central opening (15) having outwardly projected flanges (16) having holes (17) to accommodate the front (18) and back (19) support of the bracket. The back support is provided with springs (9) for easy removal of the bracket, thereby enabling dismantling the central cone easily.

Abstract: An air vent, in particular for a vehicle, includes an air outflow channel and several operating elements which regulate the outflow direction and the volume flow of an airflow and which are designed as sliding elements, a first sliding element (14) moving horizontal vanes (16), a second sliding element (18) moving vertical vanes (20), and a third sliding element (22) moving a shutoff flap (24).

Abstract: Disclosed is a ceiling grille for an air conditioner of a recreational vehicle. A center grille part is disposed on a lower surface of the ceiling grille for discharging cooled air in a vertical downward direction. The center grille part has a first center opening. A closure member is arranged above the center grille part for opening and closing the center grille part while being moved up and down. The closure member has a second center opening aligned with the first center opening and a cam part placed around the second center opening. A guide section guides upward and downward movements of the closure member. A spring is intervened between the center grille part and the closure member for biasing upward the closure member. A knob is rotatably fitted into the first and second center openings. A cap member is coupled to the knob to be integrally rotated therewith.

Abstract: An opening/closing apparatus of a damper for adjusting a blowing amount of air out of an air diffuser comprises a case mounted at the center of the diffuser in a predetermined size and shape and having an indicating scale portion to be properly positioned at the front surface thereof; a rotating shaft passed through the center portion of the case and extended in a predetermined length out of the case; a rotating manipulation portion including a knob integrally fixed to one end of the rotating shaft; and an indicating operation portion cooperated with the rotating manipulation portion to enable an indicator to direct the indicating scale, thereby confirming the exact opening or closing degree of the damper.

Abstract: The air diffuser of this assembly has a top collar with a free edge and the damper is of conventional construction, having a central core and a set of radially outwardly extending strut arms. In the central core is mounted a vertical actuating screw for adjusting the air deflector blades of the damper. The outer ends of the strut arms are formed with a stop member resting over the top edge of the diffuser collar and with a system to deform the collar walls so as to lock the strut arms to the collar against axial movement and against rotation. The stops serve to locate the damper in its proper operative position so as to direct the air uniformly over the air diffuser baffles.

Abstract: An air distribution unit for mounting in the wall or floor of a room having a plenum space behind the wall or floor, comprises a housing having an air inlet for communication with the plenum space and an air outlet; a blower between the air inlet and air outlet for drawing air from the plenum space and exhausting it through the air outlet into the room; and a grill assembly mounted over the air outlet. The grill assembly has aerodynamically profiled air distribution channels which may be circumferentially disposed, extending between the upper and lower surfaces thereof. The air distribution channels open out onto the upper surface of the grill assembly at a shallow angle in a radially outward direction so that air flowing out of said channels is directed outwardly at an angle of between about 15.degree. and 45.degree. to the plane of the grill assembly.

Abstract: An airhouse for supplying conditioned air to the interior area of an enclosed building. The airhouse incorporates one or more blowers having variable speed controllers enabling them to be operated at variable volumetric flow rates. The airhouse housing includes variable area dampers for controlling the inlet of outside or building return air. A dedicated controller is provided for adjusting the inlet areas of the two inlet pathways to provide a constant flow velocity through a direct fire burner through a range of blower volumetric output settings. In addition the units may include variable area diffuser units which tend to maintain constant discharge velocity pressure at various blower volumetric flow rate settings. In addition various control and operating strategies are provided for the individual airhouse units and a distributed array of such units in a large building structure controlled by a central computer.