Abstract: A flap device for a heat exchanger of a vehicle has a support structure in which is formed a passage. A shutter is fitted to the passage, pivotable about an operationally horizontal axis (X-X) nearer to a first end of the shutter, between a rest position in which it closes the passage and a operating position in which it opens the passage, thereby allowing a flow of air to pass in a predetermined direction through the passage. In use, the shutter pivots from the rest position towards the operating position under the effect of a flow of air which strikes it in this direction, and returns by gravity towards the rest position when the air flow ceases. A stop projection formed on the first end of the shutter strikes an abutment surface on the structure when the shutter reaches the rest position.

Abstract: A system for optimizing one or more environmental parameters of an enclosed space comprising first and second relatively enclosed regions, such as a living space and a roof space within a building, is disclosed. The system comprises an internal sensor, in the first region, and an external sensor, external to the enclosed space, for measuring respective environmental parameters. The system also comprises a controller and a diverter valve. The controller is configured to specify the first region's ideal internal environmental parameter, and compare this specified parameter with the measured first region's internal parameter and the measured external parameter to determine whether the diverter valve directs air from the first or second enclosed region to exhaust through the ventilator.

Abstract: A wastewater pump station venting system includes at least one wastewater discharge conduit; a wastewater pump station having a station interior disposed in fluid communication with the wastewater discharge conduit; at least one fresh air inlet conduit disposed in fluid communication with the station interior; at least one gas vent conduit having a vent conduit inlet segment disposed in fluid communication with the station interior and a vent conduit outlet segment disposed in fluid communication with the vent conduit inlet segment; at least one vent air inlet conduit disposed in fluid communication with the gas vent conduit between the vent conduit inlet segment and the vent conduit outlet segment, the vent air inlet conduit disposed at an acute angle relative to the vent conduit inlet segment and an obtuse angle relative to the vent conduit outlet segment; at least one vent fan disposed in fluid communication with the vent air inlet conduit; and at least one power source electrically interfacing with the ve

Abstract: Aircraft cabin airflow nozzles and associated systems and methods are disclosed. A system in accordance with a particular embodiment includes a cabin air nozzle that in turn has a first passageway bounded at least in part by a first wall portion and a second wall portion spaced apart from the first wall portion. The second wall portion can have a first surface exposed to air within the first passageway, and a second surface facing away from the first surface. The first passageway can have an exit between the first and second wall portions, and the second passageway can be positioned to direct air along the second surface of the wall portion.

Abstract: An electric actuator has a motor, an electricity storing body, a switch and a resetting unit. The switch is provided in a supply path of electric power from the electricity storing body to the motor. The switch opens the supply path for electric power from the electricity storing body to the motor, in response to an instruction from an operator. The resetting unit is operated through receiving a supply of electric power from the external power supply when the external power supply has been restored from being cut off. The resetting unit closes the switch that is provided in the supply path of electric power from the electricity storing body to the motor.

Abstract: In an induction emission air conditioning apparatus installed in a ceiling, it is provided within a casing with a heat exchanger through which a feed air introduced from an outdoor side passes, a fan passing the feed air through the air conditioning heat exchanger, and a heating and cooling unit 1 for blowing a mixed air obtained by inducing and suctioning the air in the room inside by using the feed air passing through the heat exchanger so as to mix with the feed air, into the room inside in a laminar manner, and emitting the heat of the mixed air to the room inside, integrally.

Abstract: An apparatus for controlling grille aperture ratios of a plurality of air transfer grilles which are installed in a room, includes a determining unit for determining target grille air volumes of air blowing to the racks, for determining simulation air volumes of air blowing from the air transfer grilles on the basis of the target grille air volumes so that each of air of the target grille air volumes are blown to the racks, and for determining grille aperture ratios for each of the air transfer grilles on the basis of the plurality of simulation air volumes so that each of the amounts of air blowing from the air transfer grilles is replaced by each of the simulation air volumes, and a controller for controlling each of the grille aperture ratios of the air transfer grilles on the basis of each of the determined grille aperture ratios.

Abstract: A cooling system for turbine engines for controlling cooling of rotor cooling air and heating of fuel gas is disclosed. The cooling system may be formed from a housing formed from a main plenum, a rotor air cooler positioned at least partially in the main plenum and a fuel gas heater positioned at least partially in the main plenum downstream from rotor air cooler. The cooling system may include a by-pass plenum for returning used cooling air back to a region upstream of the rotor air cooler. An exhaust fluid control device may control fluid flow out of the first exhaust opening at the second end of the main plenum, and a by-pass fluid control device may control fluid flow into the by-pass inlet opening of the by-pass plenum. The control devices and a fan may control circulation of cooling fluids through the main plenum.

Abstract: External airflow rates from floor vents that provide chilled air to information handling systems are measured with a disposable tool to ensure compatibility of the information handling systems' external air cooling constraints with the cooling capacity of the floor vents. For instance, an information handling system manufacturer sends a disposable tool formed from a cardboard box to a user location. The tool has an open bottom to fit over a floor vent and a slat cut in a side surface to move in response to airflow that enters at the bottom. Pre-calibrated markings associated with expected airflow rates for information handling system cooling floor vents measure airflow rates by the degree of slat movement so that the user location and manufacturer may confer to confirm the compatibility of the user location cooling capacity with selected information handling systems.

Abstract: A supply air unit including a supply air chamber, at least one mixing chamber nozzles or a nozzle gap through which a fresh airflow is conducted from the supply air chamber into the mixing chamber, a suction chamber into which a circulated airflow is sucked from an air-conditioned room space, and at least one outlet opening. At least one airflow controller through which an additional airflow is conducted from the supply air chamber into the suction chamber.

Abstract: An improved air volume regulator used in HVAC operating at a static pressure below 25 pa. (0.1?w.g.) having a pair of opposing gates facing into the airflow and a V shaped baffle positioned to form two constricting passageways. Air flowing through the passageway generates a light vacuum at its throat and combined with the static pressure differential across the gates urges them towards the baffle and constricts the airflow. A counterbalance spring cooperating with a concave cam and cam follower applies a resisting bias on gates such that the airflow in the regulator remains constant under varying inlet conditions. A variable spring rate mechanism permits the adjustment of the airflow rate over the full operating range using a single counterbalance spring. A cable driven “limited torque” flywheel controls the air volume regulator's propensity to pulsate under unstable inlet airflow conditions.

Abstract: The invention concerns a supply air terminal device (10) including side plates (12) and an air guiding part (13). A heat exchanger (14) is fitted in the device below a supply air chamber (11) for supply air in between air guiding parts (13) located on both sides of the central axis (Y1) of the device. In the device, the supply air chamber (11) includes nozzle apertures (12a1, 12a2, . . . , 12b1, 12b2 . . . ) to conduct fresh supply air into a side chamber (B1) and to induce a flow of circulated air (L2) from the room space through the heat exchanger (14) into the side chamber (B1). Using the heat exchanger (14) the circulated air may be either cooled or heated. The equipment includes a control device (15) for the induction ratio of the supply air flow (L1) and the circulated air flow (L2) for controlling in which ratio there is fresh air (L1) and circulated air (L2) in the combined air flow (L1+L2).

Abstract: The covering system includes at least one panel capable of being placed in an inclined position with respect to a horizontal. The panel incudes an inner chamber, a plurality of suction apertures through which the inner chamber communicates with a void inside of a building, and a discharge aperture disposed at a level higher than the suction apertures when the panel is installed.

Abstract: A device for regulating the temperature of premises by a secondary air flow blown therein, comprises an upstream duct communicating with elements for supplying pressurized air, ending in a converging element emerging into a downstream duct communicating with the premises. The device is characterized in that a substantially rotating solid, capable of being positioned along the convergent element longitudinal axis, is arranged at least partially upstream of the outlet thereof, so as to define between the substantially rotating solid outer surface and the convergent element inner wall with a ring-shaped channel the size of which depends on the position of the solid relative to the wall.

Abstract: Mixing section for outdoor air and return air in an air-conditioning apparatus, the mixing section being positioned between a supply duct supplying outdoor air into a room and a return duct removing exhaust air from the room for mixing outdoor air and return air. The supply and return ducts comprise adjusting devices for adjusting the air flows. To control the air flows at different mixing ratios and to make the mixing more efficient, guides are provided after the adjusting devices of both the supply device and the return device in a mixing space so as to divide the air flows passing through the adjusting devices into a plurality of separate interlapping air jets crossing each other.

Abstract: A device for regulating the temperature in a room having an extraction vent and a delivery vent, using pulsed low-velocity air flow (qs). A pipe is provided in communication with a pressurized air supply duct via extraction and delivery orifices, and the extraction vent and the delivery vent open out into the pipe. Two coaxial air streams are formed in the pipe between the extraction and delivery orifices, and a central stream is produced in which the air moves at a high velocity and a peripheral annular air stream is formed surrounding the central air stream in which the air moves at low velocity.

Abstract: An improved mixing box is disclosed. The mixing box comprises an inlet end, an outlet end, a substantially closed first passage to which primary air flows from a primary air inlet and then through induction means and to and from the outlet end. The induction means are positioned intermediate the inlet and outlet ends and are operable, when primary air flows through the passage, to induce a flow of air through a first opening for mixture with primary air and delivery therewith through the outlet end. The mixing box also comprises means for controlling the rate of flow of primary air and a fan operable to induce a flow of air through a second opening and to deliver such air through the outlet end of the box.