Abstract: A retractable structure for air-conditioning vent has a retractable mechanism capable of retractably installing a vane into an installing hole of a main body. The retractable mechanism includes a plurality of connecting plates on the main body, and an end of the connecting plates is limited on the main body, and the other end of the connecting plate is passed through a plug hole formed on the vane, and each connecting plate has a bracket on a corresponding side, and a middle portion of the bracket is coupled to the connecting plate, and a first bracket portion and a second bracket portion disposed on both sides of the middle portion of the bracket respectively are outwardly protruded and then inwardly bent to form a stopper portion to stop the plug hole from automatically sliding down.

Abstract: The present teachings relate to an air feed device with at least one impeller, with at least one housing that at least partially surrounds the impeller, with at least one intake opening for inward suction of air into an operating space of the impeller, with at least one opening to blow out air from the operating space of impeller. Provision is made that the air feed device has at least one additional through-passage opening for air.

Abstract: An air diffuser for use at a ventilation outlet of an HVAC system. The air diffuser comprises a base platform having an opening plenum formed from injection-molded plastic, the base platform including a collar for attachment to the outlet, the plenum defined by a perimeter rim, the edges of the rim lying substantially within a first common plane, at least one first diffuser plate positioned over the plenum, the first diffuser plate formed from injection-molded plastic and having edges lying substantially within a second common plane, and a plurality of stems integrally molded with one or more of the first diffuser plate and the base, the stems configured to secure the first diffuser plate to the base platform, each of the stems having a first end sized to fit within a complimentary female receptacle formed in one of the first diffuser plate and the base platform, the stems being formed via injection molding with one of the first diffuser plate and the base platform.

Abstract: A method and apparatus for balancing an HVAC system. The method involves using a plate which is circular in shape and has four inner cut-out portions which are capable of being manually removed by an operating engineer. To reduce flow to a minimum, all four rings are left on the plate. To allow a progressively greater amount of air flow, more rings are removed from the circular plate. Such enables the equalization of the various rooms in an HVAC system without the addition of costly upstream dampers. The circular plate is attached to a duct via four small protruding ear elements.

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: The present invention defines the anemostat that includes: 1—control valve; 2—adjusting rod (threaded); 3—diffuser; 3?—diffuser throat; 4—frame; 5—threaded hole; 6—retaining ring (fixture element); 7—mounting tube; wherein due to the fixture element (6) connection of diffuser to the tube is ensured, at the same time the use of fixture element (6) enables to quickly mount/dismantle parts of anemostat on the ceiling without risk of breakdown of any anemostat parts resulting from skew; with no increased aerodynamic noise in case of two-level securing of the mounting tube and diffuser and; with no cause of vibration (turbulent) noise origination when the air flow increases by reason of structural design of diffuser securing to the mounting tube.

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: A method and apparatus for eliminating register boxes, improving penetration sealing, improving airflow and reducing the labor costs to install ceiling registers is disclosed. A collar plate assembly that interfaces with flexible or metal air ducts is provided with at least one spring indentation ring in the collar portion of the assembly to accept two or more locking springs. These locking springs are used to attach the ceiling register to the collar plate assembly. The collar plate assembly uses mounting rails that attach the assembly to either ceiling or wall supports. After the ceiling or wall material is applied, the circular area inside the collar is cut-out to provide access. A trim ring is inserted in the cut-out that attaches between the collar and the ceiling or wall to eliminate air leakage and provide an essentially smooth flow of air from the supply duct into the inside of the structure.

Abstract: Diffuser for central air conditioning system includes a single continuous piece center core for cooperating with an intermediate core and an outer frame, the center core including an outwardly and downwardly directed slanting surface generally originating from a center apex and terminating at an edge at its bottom periphery. A pair of opposed vertical strips are attached at the back upper side of the slanting surface in spaced apart relationship and opposing each other, and opposing holes or openings are provided in each vertical strips. An intermediate core made in a single continuous piece is disclosed and includes a vertical collar at its top, and an outwardly and downwardly directed slanting surface at a terminal edge area. An outer frame element made in a single piece includes an upper collar with holes and a downward slanting wall terminating at a flange. A rod/pipe connector extending through the holes retains the assembly together in nested relationship.

Abstract: An air outlet vent (1) adapted to be mounted in a floor (6) and connected to a heating, ventilating and air-conditioning air supply duct (30) includes a cylindrical housing (2) and a cover plate (4) that covers the top open end of the housing (2). The plate (4) includes a first group of air outlet openings in the form of concentric circular arcuate slits (11) extending over a first sector of the plate (4), and a second group of air outlet openings in the form of radially extending slits (12) in a second sector of the plate (4). The plate (4) is rotatably adjustable in the housing (2). With this arrangement, the direction of the main air flow axis of the air flow pattern generated by the vent can be infinitely rotationally adjusted around an imaginary inverted cone, to direct the air flow where desired and avoid undesirable drafts, while still providing a highly turbulent twisting or spiraling air flow characteristic.

Abstract: An air discharge unit (100) for underfloor air conditioning employs a centripetal fan (2) to realize low pressure loss, low noise and energy saving while reducing the heightwise thickness of the whole unit. The centripetal fan (2) is installed in an underfloor chamber (104) formed between a floor panel (103) and a floor slab to face an outlet (1) provided in the floor panel 103, and is driven by a motor (4). The centripetal fan (2) has a hub (200) and a plurality of blades (20) formed on an outer surface of the hub (200), and sucks therein an air in the underfloor chamber (104) from radially outward direction to make the air spirally flow toward the outlet (1) generally in an axial direction.

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: A ventilator for ceilings, walls or floors comprises two principal integers, an outlet means and a ventilation tube connector. These integers may be connected by screw-thread means which is operable from outside the ventilator either manually or by means of a special tool.

Abstract: A laminar flow diffuser has a plurality of round, thin, stacked plates. A central bore penetrates all the plates with the exception of the bottom plate. The diffuser is secured to the vacuum chamber port. When gas enters the port, it enters the central bore and then flows radially outward through the interplate spaces to the outer circumference of the plates and subsequently into the periphery of the chamber. The diffuser thereby provides a controlled laminar flow which prevents turbulence in the chamber and hence, reduces the possibility of contamination to the workpiece in the chamber. The laminar flow diffuser is easily cleaned, both during its initial assembly and later after use, because it chiefly has flat surfaces which do not harbor dirt or gas.