Abstract: A flexible cover plate with an airflow opening. A fan carried on a rear side of the cover plate over the airflow opening. A protective screen carried on a front side of the cover plate over the airflow opening. An angle bracket carried in an elongated slot disposed in said cover plate having a first portion extending parallel along the rear side of the cover plate, and a second portion extending transverse to the front side of the cover plate above the airflow opening. A flexible polymer foam sheet carried on the rear side of the cover plate for conforming to a vent opening in a building foundation wall so that an airtight seal is formed against the vent opening. A fan speed controller adjusting a desired speed of the fan and airflow through the airflow opening.

Abstract: Disclosed is an air terminal device for a ventilation system for a building. The air terminal device includes a pressure box, with an inlet admitting supply air into the pressure box and outlet openings for admitting supply air out. The device further includes first and second cover plates, each arranged to control and change the open area of a plurality of the outlet openings. The outlet openings are arranged in a wall of the pressure box forming an outlet surface of the pressure box. The cover plate or cover plates are arranged to be in contact with and slide relative the outlet surface while changing the open area of the outlet openings. The first cover plate and the second cover plate are arranged to slide relative each other and to be in contact with and slide relative the outlet surface while changing the open area of the outlet openings.

Abstract: An energy efficient and quiet air cooling system for a building structure is provided. The air cooling system includes an evaporator system mounted in the wall of the building, a remotely mounted fan, an air intake, and a sound and heat insulating duct. The fan is mounted in the attic and configured to draw air from the living area of the building through the sound insulating duct with sufficient power to create a negative static pressure in the living area. The negative static pressure in turn causes outside air to flow through the evaporator system which removes heat from the outside air. The cooled air is in turn drawn into the building and pulled into the attic through the duct and expelled through the attic. The fan expels warm air into the attic, creating a positive pressure environment which causes the warm air to be expelled from the attic through natural vents.

Abstract: An apparatus and method for providing selective fan or vent cooling are disclosed. An example embodiment includes: a return plenum box having a return box opening, a fan opening, and a return duct opening; a fan coupled to the fan opening; a controller coupled to the plenum box; and an adjustable damper coupled to a hinge point of the return plenum box, the damper being adjustable between a closed position, which blocks the fan opening and an open position that blocks the return duct opening.

Abstract: A solar powered fan kit is provided for installation in a roof and in the ridge of the roof. The solar powered fan kit includes a fan attached to a fan bracket. The fan bracket is configured to be suspended from a roof within a ridge vent of the roof. A solar panel is attached to the roof to supply power to the fan.

Abstract: An air passage device for installation into a mounting opening (50) in a wall (51) for components generating waste heat, such as a switch box, includes a base housing (21; 221) with a fan support (25) and a design cover (80; 280), wherein the design cover (80; 280) has on an air inlet side a covering device (100) constructed as a fan grid (10; 210) with sheet elements (90, 90?; 290, 290?).

Abstract: An exhaust fan, an exhaust duct through which a discharged gas flows and a filter which is provided in the exhaust duct are included. A curved portion is provided in the exhaust duct, and the filter is provided on a downstream side in a direction of flow of the gas with respect to the curved portion. On an inside wall of the curved portion of the exhaust duct on an outer side in a radial direction, a first flow control member that uniformizes the amount of the gas flowing through the filter is provided so as to be perpendicular to the shaft of the curved portion, and a space is formed between the first flow control member and an inside wall of the curved portion on an inner side in the radial direction.

Abstract: Embodiments of the invention provide a ventilation assembly including a scroll assembly that can include a blower assembly including a motor coupled to a blower wheel. Some embodiments include a discharge grid capable of being coupled to the scroll using a coupling pin or snap tabs. In some embodiments, the discharge grid includes a plurality of vertical and horizontal fins, and an outlet restriction. In some embodiments, at least one of the plurality of horizontal fins extends from the outlet restriction to couple with at least one vertical fin to form an aperture. In other embodiments, at least a portion of at least one of the plurality of vertical and horizontal fins includes a flared surface. Some embodiments include a scroll assembly that includes a scroll crescent. In some embodiments, a scroll including a discharge grid and scroll crescent can at least partially guide a fluid within the ventilation assembly.

Abstract: An electronic device includes an air dam module. The air dam module includes a frame defining a vent, a first rotating member, a second rotating member, and two third rotating members. The first rotating member is rotatably connected to a surface bounding the vent, to vertically block a lower half of the vent by its gravity. The second rotating member is rotatably connected to the surface bounding the vent. The third rotating members are rotatably connected to opposite ends of the second rotating member. The second and third rotating members vertically block an upper half of the vent by their gravities.

Abstract: A ceiling vent assembly consisting of a pair of opposed end panels and a pair of opposed side panels which defining a frame. At least one louver is pivotally mounted within the frame to be movable between an open position to permit airflow through the vent assembly and a closed position blocking airflow. The louver includes an upper surface defining a curvature and decreases in thickness at an outer edge. When in an open configuration, the louver permits air to pass through the ceiling vent assembly in a directed flow associated with the curvature of the louver upper surface.

Abstract: An energy-efficient ventilation system comprises a ventilation fan, ductwork, system controller, and a plurality of ventilation points, each comprising a damper, a differential pressure sensor, a ventilation point controller, and a fume detector. When a ventilation point does not require ventilation, a signal is sent to the system controller to reduce the ventilation fan speed thereby using only as much energy as is needed to provide service to the ventilation points that need ventilation. The fume detector, damper, and differential pressure sensor for each ventilation point are used to determine whether ventilation is needed at a ventilation point and to control the ventilation point accordingly.

Abstract: An apparatus for diverting air discharged from a forced air vent comprises a sheet of flexible material extending between front and rear edges and first and second side edges, the first and second side edges and the rear edges being securable to corresponding edges of the vent, wherein the front edge is free from the vent and movable between a resting position adjacent to the vent and a raised position when air is discharged through the vent.

Abstract: A gas cabinet and a method of controlling air flow through said gas cabinet. The gas cabinet includes an enclosure; a damper having at least two flow rate positions; an exhaust outlet; a set of sensors; and a programmable logic controller configured to change a flow rate position of the damper from a first flow rate position to a second flow rate position based on the state of the sensors. The method includes using the damper to lower the amount of exhausted air required under normal operating conditions and using the damper to increase the amount of exhausted air when a possible gas leak is detected.

Abstract: Silencing equipment provided with one or more flow channels through which cooling air flows has a flow channel forming member that forms the flow channel, and an acoustic absorbent member that is fixed to the flow channel forming member. A resonance type silencer is formed on a wall surface of the flow channel by providing a cavity for the resonance type silencer in the acoustic absorbent member and an aperture for the resonance type silencer in a portion of the flow channel forming member. The resonance type silencer sets a frequency of noise necessary to be reduced based on a peak frequency of noise generated by a fan. The silencing equipment further has a slide member which slides by a slide mechanism to adjust the area of the top of the aperture. The silencing equipment for electronic devices capable of cooling heat generating sections thereof with air has a small and simple structure and can improve a silencing effect by blowing air.

Abstract: An air moving system includes an air moving device including a housing member, a rotary fan assembly, and a nozzle, the housing including a plurality of air intake vents. The nozzle is configured to move relative to a longitudinal axis of the air moving device. The air moving system includes a ceiling grid structure. The air moving device is configured to rest within a grid within the ceiling grid structure or within an opening in the ceiling.

Abstract: A device for an air handling system in which the cooling beam has a pressure chamber (2), from which the volume flow of the supply air (L1) out to the room is regulated with a regulating strip (6) that is mounted on the surfaces (9) in the pressure chamber and where the flow of the supply air (L1), in the mixing chamber (4), provides an optimal flow pattern of the recirculating air (L2) from the room and where the combined flow of supply air (L1) and recirculating air (L2) acquire well defined flow profiles independent from the volume flow (L1).

Abstract: An exhaust system for exhausting air from a space includes a variable-volume exhaust air moving system having at least one fan having an inlet and an outlet. A duct is connected to the inlet and an outlet nozzle defining a variable cross-sectional outlet area is fluidly connected to the outlet. A selectively operable bypass damper is fluidly connected to the inlet. A sensor is located in the exhaust system for detecting at least one of a pressure condition and a flow condition therein. A control system controls the at least one fan, the outlet nozzle, and the bypass damper, based on a signal sent from the sensor.

Abstract: An internally adjustable damper for use in a commercial kitchen includes a housing having a sidewall defining an interior, a first open end, and a second open end in fluid communication with the first open end. A damper blade is disposed within the housing and is rotatable about an axis of rotation to allow a selectable air flow resistance. An arch extends from the damper blade and adjacent to the sidewall, the arch being symmetric about the axis of rotation. A threaded stud extends from the sidewall into the interior of the housing and is disposed adjacent the arch. A fastener is operatively coupled to the threaded stud, wherein the fastener is adapted to selectively press down against the arch, thereby fixing the location of the damper blade, and retract from the arch, thereby allowing the damper blade to rotate about the axis of rotation. The fastener and the baffle are accessible from inside the housing through either the first open end or the second open end.

Abstract: A heat dissipating structure includes a frame. An accommodating space is formed inside the frame for accommodating a fan, and an opening is formed on a lateral side of the frame. The heat dissipating structure further includes at least one shutter connected to the frame in a rotatable manner. The fan is disposed on a side of the shutter. The shutter prevents airflow driven by the fan from flowing back to the other side of the shutter through the opening when the shutter rotates to a close position. The heat dissipating structure further includes a resilient component for providing a resilient force to the shutter so as to drive the shutter to the close position.

Abstract: An indoor grilling cabinet has a metal cabinet with at least one door opening to an interior portion. The cabinet is double walled with a plurality of openings in the interior wall to allow fresh air from outside to be drawn into the cabinet and exhausted through an exhaust hood disposed on top of the cabinet. A double walled exhaust pipe is provided to allow fresh air in to the air space between the double walled cabinet and to exhaust contaminated air to the outside. In one embodiment, a shelf is provided to allow a user to place a table-top grill in the cabinet. The exhaust pipe fits within an opening made in the structure or through a window with an optional window kit. An exhaust fan is disposed within the exhaust hood to draw the contaminated air out of the cabinet. In one embodiment, a light is provided.

Abstract: An ice maker equipped with a convection fan includes a control box, an ice making tray, a water intake unit and an ice sweeping shaft. The control box holds at least one convection fan and has at least one air inlet and one air outlet to allow the convection fan to generate cooling air convection to accelerate cooling speed and improve ice making efficiency.

Abstract: The present invention discloses an air conditioner cover having at least two posts, a plurality of slats, and a plurality of obstructions used to properly distance the slats from the ground. The air conditioner cover also has connectors disposed between said posts and said slats in some embodiments. The air conditioner cover is designed to surround an air conditioner unit in order to hide it from sight and to protect the air conditioner unit from various types of damage. The present invention is specifically designed to ensure appropriate ventilation, as the uniquely shaped slats have in order to provide a spacing gap for ventilation purposes, while still providing a barrier to the air conditioner unit.

Abstract: A heating and cooling system for a multi-level space is provided that comprises at least one lower level return air duct and at least one upper level return air duct, and a thermostat for controlling the operation of the heating or cooling system through either a low voltage cooling activation signal or a low voltage heating activation signal.

Abstract: An electronic device includes a chassis enclosing a fan and a sliding member. The chassis defines an air intake aligned with an inlet of the fan, and an opening. The sliding member is slidably mounted to the chassis and includes an operation part exposing through the opening. The sliding member is capable of either fully or partially covering and uncovering the air intake of the chassis via manipulating the operation part to slide in the opening.

Abstract: A heat dissipation module includes a first heat dissipation apparatus, a second heat dissipation apparatus, and a flow direction controlling structure. The first heat dissipation apparatus and the second heat dissipation apparatus are symmetrically disposed. The flow direction controlling structure has several rotatable elements disposed between the first heat dissipation apparatus and the second heat dissipation apparatus. Each of the rotatable elements has a fixed end and a correspondingly movable end for guiding airflow. The rotatable elements can be sheet-shaped, wing-shaped, arc-shaped or nonlinear in cross section. The thickness of the rotatable elements varies or decreases from the fixed end to the movable end. The rotatable elements overlap an adjacent rotatable element so as to selectively seal the heat dissipation apparatuses.

Abstract: A heat dissipation module is disclosed. A first heat dissipation apparatus and a second heat dissipation apparatus are symmetrically disposed. A flow direction controlling structure has a rotatable element disposed between the first and second heat dissipation apparatuses and formed an isolation wall thereof, so that the first and second heat dissipation apparatuses respectively have a tunnel. Each of the rotatable elements has a fixed end and a correspondingly movable end for guiding air flow. When outlet pressures of the first and second heat dissipation apparatuses are different, the movable end deflects to the first heat dissipation apparatus or the second heat dissipation apparatus to change outlet areas thereof. The heat dissipation module and the flow direction controlling structure control air flow and prevent backflow, so as to maintain overall outlet area and improve heat dissipation effect of the module.

Abstract: A recirculating fan, for installation in an upper region of a building space, and having, a housing, a fan, an air vent ring defining an intake path and a discharge path, an air grille for the intake and discharge paths, the air grille being releasably attached to the housing and being moveable relative to the housing, and releasable fastening devices for releasably fastening the air grille to the housing.

Abstract: The invention relates to a wall sleeve with a ventilation opening at a guide tube (2), and a cover plate (5), which is mounted at the end of the guide tube and can be moved between a closing position and an open position, said cover plate (5) automatically opening and closing against a reset force, propelled by the pressure difference between the air pressure in the guide tube (2) and the external ambient air.

Abstract: A set of cooling air blowers for machines which require cooling air during operation. The blowers each include an outlet having an anti-reverse flow feature for preventing the flow of air into the blower from externally of the machine should the blower fail, thereby ensuring that the remaining operating blowers are able to maintain a normal and adequate flow of cooling air through the air inlet of the machine and outwardly through the outlets of the remaining operating blowers. Each blower generally includes a blower housing having an inlet, an outlet, and an internal cavity in which an impeller is rotatably disposed, the impeller driven by an electrical motor mounted within the blower housing.

Abstract: An air exhaust system comprises a chamber. The chamber has side walls, a ceiling, an attic and a roof. The ceiling and roof have air flow apertures. Provided next is a duct with upper and lower ends. A turbine fan is provided. The fan is operatively coupled to the upper end of the duct and rotatable about a vertical axis. The fan is further adapted to be self rotated as the air moves from a location in the chamber to a cooler location above the fan. Last provided is a damper. The damper is located above the lower end of the duct. The damper is moveable between closed and open orientations. The closed orientation precludes the flow of air through the duct. The open orientation allows for the flow of air through the duct.

Abstract: In a cooling system for cooling racks in a data center, cooling fluid is circulated in the data center by a cooling device having a fan. In addition, this system includes a plenum having a plurality of returns and an outlet. The outlet of the plenum is in fluid communication with the fan and the plurality of returns are configured for removing the cooling fluid from the data center. Furthermore, the returns and are operable to vary a characteristic of the removal of the cooling fluid.

Abstract: A damper for an air turbine mounted on the roof of a house, or other structure, comprising a tube adapted to fit into the opening below the turbine, a cover hingedly attached to the tube, a cable attached to the cover adapted to be pulled out to close the cover or pushed in to open the cover. The damper is attached to the turbine by clips which attach to a flange of the turbine or by brackets affixed to the roof.

Abstract: A driving device which is automatically activated by detecting solar light and an automatic ventilation system utilizing the aforementioned driving device. An electric motor (21) is connected to relay switch (22), which is connected to limit switch (23) and light sensor switch (24). The limit switch (23) is connected between the relay switch (22) and the power supply and a manual main switch (25) between the light sensor switch (24) and the power supply. Normally when the main switch (25) is "on" and solar light exceeds the threshold, the light sensor detects it and the contact of the switch (24) changes to be activated. Electricity is then supplied to the relay switch (22) and the contact of the relay switch (22) also change to be activated. The electric motor is interlinked with a vent cover via the power transmission and the vent cover gradually begins to open.

Abstract: A wall connector for connecting a clothes dryer air outflow duct to outside ambiant air through a building external wall. The connector includes: a rigid tubular main body, extending through and mounted into an aperture in the building wall; an inner end portion, sized to fit about the dryer air duct outer end mouthpiece in substantially air-tight fashion; and an outer end portion, of double wall construction, wherein a peripheral cavity is formed thicknesswisely of said main body, the peripheral cavity defining an end mouth opening to outside ambiant air. A hood fits against the exterior face of the building wall, and includes: an inner tubular section, releasably engaging through the peripheral cavity of the connector main body, and louvers, for preventing air inflow from ambiant air into the connector main body.

Abstract: A fume hood with an adjustable baffle system includes a housing with a chamber and a baffle system disposed in the chamber. The baffle system includes a plurality of baffle plates and a plurality of support brackets for releasably securing the baffle plates in substantially end-to-end relation in the chamber. The support brackets allow adjustment of at least one plate to vary the gap or distance between the plate and an adjacent plate.

Abstract: Methods and apparatus for controlling the flow of fluid around an object which include means to periodically vary or fluctuate the direction, speed or magnitude of the fluid flow. The fluid flow is particularly controlled to control eddy formation. The fluid is preferably a gas or vapor.

Abstract: A lightweight weather-resistant cover for attachment to air conditioner compressor cabinets of the type containing a fan and having an opening in a wall of the cabinet for exhausting air. The cover has an attachment portion for attachment to the cabinet wall adjacent the exhaust opening and a lid portion of sufficient size to cover the exhaust opening and is hinged to the attachment portion. The lid portion is normally maintained in a closed position covering the exhaust opening when the fan is not operating and is pivoted to an open position extending angularly above the exhaust opening by the exhaust air when the fan is operating. When the fan ceases operation, the lid portion drops back down onto the cabinet wall to cover the opening and prevent the elements and other foreign matter from entering. The attachment portion may be secured to the wall of the cabinet by a strip of magnetic material or tape.

Abstract: A power actuated roof vent apparatus generally comprises an insulated air passageway housing through the roof which allows a linear and unrestricted air flow through the air passageway housing when the apparatus is in operation and an insulated passageway closure lid which positively closes the air flow through, and prohibits water ingress into, the air passageway housing when the apparatus is not in operation.