Abstract: A roof ventilation system operable based on environmental parameters is disclosed. The system includes a vent, a fan, a solar panel, a battery and a controller. The vent is positioned within a field of a roof, and includes a first opening configured to allow airflow between regions above and below the roof. The fan is positioned to generate an air flow through the vent. The solar panel is positioned on the roof in a location such that the solar panel receives solar radiation. The battery is electrically connected to the solar panel. The controller is in communication with the fan, and is configured to drive the fan based on at least one environmental parameter.

Abstract: An air duct that can be attached to existing grille of an electronic device to improve airflow and reduce overall system impedance/pressure drop without increasing the power to an air mover. The air duct has a wall configuration to smooth-out airflow while simultaneously delivering more airflow to selected portions of the interior of an electronic device, such as a server.

Abstract: An air diffuser includes a mask plate spaced upstream from an orifice plate in a generally parallel relationship. The orifice plate includes openings in a first zone arranged in a non-linear pattern, inside a second zone arranged in a linear pattern. Both zones can be within a peripheral wall defining the spacing between the mask plate and the orifice plate. The mask plate has a large opening for air, with a footprint slightly larger than the first zone. The density and zone arrangement of the mask plate and the orifice plate results in a better umbrella pattern flow of air exiting the diffuser.

Abstract: Present embodiments provide a roof fan assembly with numerous improvements. The roof fan assembly includes a cover which allows for a fan shroud to be opened. The structure includes a base clamp which connects to the roof of an RV. The base clamp includes a fan and motor which push or pull air out from the RV or into the RV. The base clamp includes a worm gear assembly which includes a worm gear structure to open and close the shroud. The arm may include a sleeve which moves relative to the arm and connects to the shroud at the opposite end. The base clamp includes mounts for connecting the base clamp to the roof as well as allowing for connection of the cover to the fan assembly as a whole. Still further, the structure provides integrated hinges in the base clamp to allow connection of the shroud to the base clamp for pivotal movement.

Abstract: A vehicle vent assembly includes a first flow channel selectively operating a primary airflow. A second flow channel selectively operates a first secondary airflow that exerts a first pressure on the primary airflow. A third flow channel selectively operates a second secondary airflow that exerts a second pressure on the primary airflow. The first and second secondary airflows control a direction of the primary airflow. The first pressure includes a positive or negative pressure, and the second pressure includes a respective negative or positive pressure.

Abstract: A vaneless ventilation system includes a rigid duct and a vent assembly in fluid communication with the duct. The vent assembly includes a rigid housing defining an outlet, a bendable duct disposed inside the rigid housing, a linkage assembly coupled to the bendable duct to allow deflection of the bendable duct upon movement of the linkage assembly, and an actuation mechanism coupled to the linkage assembly, wherein actuation of the actuation mechanism causes the linkage assembly to move, thereby deflecting the bendable duct.

Abstract: A fork (10) for an operating element in an air outlet has a first bearing journal (14) at a first end (12) and a second bearing journal (18) at a second end (16). At least one spring arm (22, 24) is provided between the first bearing journal (14) and the second bearing journal (18), it being possible for the spacing of the outer ends (12, 16) of the bearing journals (14, 18) to be reduced by way of said at least one spring arm (22, 24). Furthermore, an operating element and a method for fastening an operating element are provided.

Abstract: A concealed roof vent has a base member having a primary aperture, a top panel coupled to the rear side of the base member and extending to the front side of the base member at an increasing angle, the top panel sized so as to shield the primary aperture; the top panel being coupled to the front side of the base member using one or more support legs; and at least one secondary aperture on the front side between the panel and the base member. Air from the attic passes through the primary aperture to the secondary aperture, through channels on the underside of roofing tiles, and to the atmosphere.

Abstract: An HVAC actuator configured to actuate an HVAC component may include a rotatable output shaft having a range of rotation between a first end position and a second end position, a drive mechanism configured to selectively drive the output shaft, and a housing for housing the drive mechanism. The HVAC actuator may include a position indicator viewable from a front side of the housing that moves as the output shaft is rotated such that the position indicator indicates a current position of the output shaft. The position indicator may include an indicator wheel that is directly coupled to the output shaft of the HVAC actuator and may rotate with the output shaft. The indicator wheel may have one or more markings that move with the indicator wheel. The one or more markings may include a line extending in a radial direction from a rotation axis of the indicator wheel.

Abstract: A fan includes a temperature sensor, such as a passive infrared sensor, for sensing temperature at a location remote from the fan, such as at a floor, ceiling, or wall, or simply external to the fan housing. This may avoid the influence of heat generated from components of the fan, such as the fan motor or controller for controlling the operation of the fan. A mounting arrangement for forming a connection between two parts, such as components of a fan, is also described.

Abstract: A hot/cold aisle air containment system includes a frame structure, at least one electronic equipment enclosure installed at least partially within the frame structure, and a header panel assembly. The frame structure adapted to be at least partially covered by one or more panels to define an interior space and includes at least one horizontal member. The header panel assembly is installed between a top of the at least one electronic equipment enclosure and the at least one horizontal member of the frame structure to prevent circulation of air above the enclosure. The header panel assembly includes a pair of panels. A first of the pair of panels is adjustable horizontally relative to a second of the pair of panels, and the pair of panels, together, are adjustable vertically relative to the least one horizontal member.

Abstract: An air conditioning case defines a warm air passage, a cool air passage, a first space, and a second space therein. The cool air passage is in communication with the first space. The warm air passage is in communication with the first space. The second space is connected to the first space on a side of the first space away from the cool air passage. A case interior member including a tunnel member and a blade is arranged in the first space. The tunnel member includes an upstream-end forming portion and a downstream-end forming portion. The upstream-end forming portion is open to the warm air passage. The downstream-end forming portion is open in a direction away from the upstream-end forming portion. The blade extends from the downstream-end forming portion to both sides along a width direction, and guides the air from the tunnel channel to diffuse along the width direction.

Abstract: A ventilation system for an underground mine includes a blowing curtain, a passive regulator in a shape of an airfoil and an airflow ventilation source. The passive regulator is positioned in the air path adjacent a discharge end of the blowing curtain.

Abstract: Disclosed is an air deflector moving mechanism. The air deflector moving mechanism includes an air deflector (1) and a driving mechanism. The air deflector (1) is in a drive connection with the driving mechanism and moves under a driving action by the driving mechanism. The driving mechanism includes a rotary column (2). A driving groove (3) extending in an axial direction is provided circumferentially on an outer periphery of the rotary column (2). The air deflector (1) is provided with a driving head (4) disposed in the driving groove (3). Also disclosed is an air conditioner including the air deflector moving mechanism.

Abstract: A fire ventilation system. The fire ventilation system includes a frame having an open central area. The frame can removably secure within an opening of a building, such as a door or window. A flange extends away from the frame along an inner perimeter thereof. A tube having an inlet thereon, extends along an outer perimeter of the frame. A gap is disposed through the tube, wherein the gap can expel fluid received through the inlet therethrough, such that the gap expels the fluid towards the flange.

Abstract: A method for natural ventilation of a vehicle interior includes steps of: determining, by a controller, formation of an interior negative pressure in an interior space while driving of a vehicle is maintained as an internal air mode, determining, by the controller, an over-production of a harmful gas in an exhaust gas using an air-to-fuel ratio or an Accelerator Position Scope (APS), in an air conditioning system; regarding satisfaction of the formation of the interior negative pressure and satisfaction of the over-production of the harmful gas as an entry condition and mixing an exterior air into the interior space so as to mitigate the interior negative pressure in the internal air mode; and after mixing the exterior air, regarding the non-satisfaction of the over-production of the harmful gas as a cancellation condition and blocking the exterior air.

Abstract: A control device that includes a body, a movable element that is movable according to a first degree of freedom relative to the body, an actuator for moving the movable element relative to the body, and a secondary control device. The secondary control device has a switch movable between an open position in which a function is deactivated and a closed position in which the function is activated. The actuator is movable according to a second degree of freedom between a spaced apart position and a control position in which the actuator moves the switch between its open position and its closed position.

Abstract: The present invention relates to a safety workbench having a work space surrounded by a housing having a work opening located in the housing front side and adjustable with an adjustable front panel for admitting into the work space an air inlet flow, an exhaust blower and a circulating air blower for conveying an air flow in the safety workbench, which are designed such that a partial air flow drawn in by the exhaust blower is filtered through an exhaust air filter as exhaust air flow from the safety workbench and a partial air flow drawn in by the circulating air blower through a circulating air filter as downwardly directed circulating air flow into the work space, and a control device, a differential pressure sensor (16) and two pressure transducers connected thereto which are designed to measure a pressure at two different positions within the safety workbench d, wherein a first of the pressure transducers is arranged in the immediate vicinity of the fan blades on the low pressure side of the circulating

Abstract: An insulated HVAC duct component such as a transition box includes a first insulation layer and a second, different insulation layer. The transition box includes at least four sidewalls and one of a top and a back wall, the transition box further including a first access port and a second access port, the first access port having a different cross section than the second access port, one of the access ports being spaced from a nearest sidewall by less than 2 inches. The first insulation layer is located along an inside surface of the box. The second different insulation layer overlies the first insulation layer, the second different insulation layer having an air impervious surface, wherein the combined thickness of the first insulation layer and the second different insulation layer is less than 2 inches.

Abstract: An air channel assembly (100) and a refrigerator (200) having the same are provided. The air channel assembly (100) includes: a casing (10) provided with an air supply channel (11) and a drainage port (14) therein. The air supply channel (11) has an air inlet (12) and a bottom air supply port (13). An air-supply guide portion (15) configured to lead air to the bottom air supply port (13) and a drainage guide portion (16) configured to lead water to the drainage port (14) are provided adjacent to the bottom air supply port (13). A guide direction of the air-supply guide portion (15) is opposite to a guide direction of the drainage guide portion (16).