Abstract: A system for cooling computing devices within a facility includes an air inlet that delivers cool air to a supply air space within the facility, an exhaust air damper that is configured to exhaust heated air from an exhaust air space within the facility, and computing devices that are arranged within the facility to at least partially partition the supply air space from the exhaust air space. The system also includes an air filter that is configured to filter the cool air and a mixing damper that is positioned within the interior space of the facility and that is operable to control an amount of exhaust air that is mixed with the cool air. The cool air and/or a portion of the exhaust air are used to cool the computing devices and airflow through the system is substantially driven by fans of the computing devices.

Abstract: A system for cooling computing devices within a facility includes an air inlet that delivers cool air to a supply air space within the facility, an exhaust air damper that is configured to exhaust heated air from an exhaust air space within the facility, and computing devices that are arranged within the facility to at least partially partition the supply air space from the exhaust air space. The system also includes an air filter that is configured to filter the cool air and a mixing damper that is positioned within the interior space of the facility and that is operable to control an amount of exhaust air that is mixed with the cool air. The cool air and/or a portion of the exhaust air are used to cool the computing devices and airflow through the system is substantially driven by fans of the computing devices.

Abstract: A system for cooling computing devices within a facility includes an air inlet that delivers cool air to a supply air space within the facility, an exhaust air damper that is configured to exhaust heated air from an exhaust air space within the facility, and computing devices that are arranged within the facility to at least partially partition the supply air space from the exhaust air space. The system also includes an air filter that is configured to filter the cool air and a mixing damper that is positioned within the interior space of the facility and that is operable to control an amount of exhaust air that is mixed with the cool air. The cool air and/or a portion of the exhaust air are used to cool the computing devices and airflow through the system is substantially driven by fans of the computing devices.

Abstract: A system for cooling computing devices within a facility includes an air inlet that delivers cool air to a supply air space within the facility, an exhaust air damper that is configured to exhaust heated air from an exhaust air space within the facility, and computing devices that are arranged within the facility to at least partially partition the supply air space from the exhaust air space. The system also includes an air filter that is configured to filter the cool air and a mixing damper that is positioned within the interior space of the facility and that is operable to control an amount of exhaust air that is mixed with the cool air. The cool air and/or a portion of the exhaust air are used to cool the computing devices and airflow through the system is substantially driven by fans of the computing devices.

Abstract: A single-package, wall-mount air conditioner is provided with an economizer unit having a pair of vertical conduits for delivering fresh outside air to a pair of blowers and a damper system that can be selectively positioned to open and close the conduits. The damper system also opens and closes return air recirculation openings through which return air is delivered to the blowers. When the air conditioner is operating in an economizer cooling mode, the return air recirculation openings are partially or completely closed and some or all of the return air is discharged outwardly and upwardly from the air conditioner in a manner to impede any entrainment of the discharged return air with the fresh outside air that is entering the air conditioner.

Abstract: A set of methods and apparatus for efficiently pressurizing and ventilating an air-supported greenhouse or other structure requiring pressurization and ventilation. A method for efficiently pressurizing and ventilating an air-supported structure comprises directing any external wind flow and external wind pressure into mechanical flow means, such as a fan, or fans in parallel, operating in the intake direction, and into the internal space of the air-supported structure and out of the internal space of the air-supported structure through internal pressure regulating exhaust means, whereby the internal space of the structure will be ventilated and pressurized with the assistance of any external wind and the reliability of mechanical flow means (fans).

Abstract: A domestic appliance includes an open air duct and a flow cross-section adjuster in the air duct for adjusting a flow cross-section of the air duct. The flow cross-section adjuster includes rotatably mounted blades for noise dampening purpose. The air duct and the flow cross-section adjuster are in a cooling air inflow region relative to a heat exchanger or a compressor of the domestic appliance.

Abstract: The disclosure relates to a method for operating a ventilation system with a mixing chamber into which air is supplied via a first supply duct and via at least one further supply duct. Air is removed from the mixing chamber by a removal duct. The supply of air—volume control—into the mixing chamber from the supply ducts is controlled in each case via flaps with a plurality of flap leaves and/or a plurality of flap units each having a plurality of intercoupled flap leaves. According to the disclosure, the flap leaves and/or the flap units are activated individually, and an individual opening position of the respective flap leaves or of the flap units with the flap leaves is made possible.

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: An exhaust apparatus provides a housing with at least one exhaust compartment disposed within the housing, and at least one draft damper repositionable to operate at orientations of about 0°, 90°, 180° and 270° with respect to a level plane of an exterior bottom surface of the housing.

Abstract: A system and method of supplying conditioned air to an aircraft environmental control system during ground support operations that uses at least one flow control door to control the flow of cooling air through a heat exchanger. The heat exchanger removes heat from a flow of compressed air supplied to the system. The temperature of the conditioned compressed air is controlled by selectively positioning the flow control door, which regulates cooling air flow through the heat exchanger.

Abstract: A high tension electrical equipment cooling structure for cooling batteries which supply electricity to the operating motor via an inverter, and the inverter using cooling air, and includes an equipment box for guiding cooling air introduced from a cooling air inlet port into a cooling air outlet port, and a fan for introducing cooling air from the cooling air inlet port. A shutter that includes an elastic material is disposed inside the intake duct. The shutter closes off the cooling air flow path, and when negative pressure is generated downstream of the shutter due to the operation of the fan, the shutter undergoes elastic deformation, and as a result, the cooling air flow path is opened.

Abstract: A mixer for first and second fluids, e.g. fresh air and return air respectively, has an outlet for the first fluid which is contiguous to outlet for the second fluid. A first flap is able to move from a position wherein the fresh air outlet is closed to a position wherein the fresh air outlet is open. A second flap is able to move from a position wherein the return air outlet is closed to a position wherein the return air outlet is open. The first and second flaps are connected to move in unison from a position wherein the fresh air outlet is open and the return air outlet is closed to a position wherein the fresh air outlet is closed and the return air outlet is open. Preferably, there is a plurality of alternating fresh air and return air outlets, and the first and second flaps are fixedly joined substantially at right angles to one another.

Abstract: A dual-channel mixing box (1) is arranged in series with other such mixing boxes in order to regulate the temperature of the air in one room each or in several rooms. Each mixing box is provided with supply pipes (3,4) running through it, in which air of different temperatures flows. Each supply pipe is provided with a damper (5), the dampers in a mixing box (1) being adjustable by means of a motor-operated rod (6) so that when one damper is moved in closing direction, the other damper is moved in opening direction, and vice versa. A mixing chamber (11) for the air from both supply pipes is formed between the supply pipes (3,4). The mixing chamber is in controllable communication with one or two outlet chambers (12) communicating through pipes with the room(s) in which the temperature is to be regulated via the mixing box in order to supply a mixture of air with the desired temperature.

Abstract: The air mixing device, for use in an air conditioning apparatus or a vehicle heater system as a flow control device which consists of at least two flap members, the flap members being mutually independently movable between first and second positions in which they respectively obturate first and second air inlet openings.