Abstract: An air conditioning system for a vehicle includes a first air path formed within an air duct, and a second air path formed within the air duct. The air conditioning system also includes an air mixing damper for adjusting a first amount of air, which flows within the first air path, and a second amount of air, which flows within the second air path. The air mixing damper includes a plurality of convex portions, and a plurality of concave portions, each of which concave portions is positioned between adjacent pairs of the plurality of convex portions. The air conditioning system also includes a drive mechanism for driving the air mixing damper. The drive mechanism includes a first gear engaging a portion of the plurality of convex portions and a portion of the plurality of concave portions. The drive mechanism also includes a shaft coupled operationally to the first gear, and an end of the shaft is positioned outside the air duct.

Abstract: Methods and apparatus for recirculating air in a controlled ventilated environment. In one example, recirculation of air from one or more rooms in a multiple room ventilated environment having a common source of supply air is controlled such that minimum ventilation and thermal load requirements for each room are satisfied independently, so as to facilitate a reduction in the amount of fresh outside air required for the environment. In another example, the controlled airflows in each room may be based additionally on respective air quality levels of the air drawn from each room. In one aspect, if contaminants are detected in one or more rooms of the ventilated environment, the amount of air recirculated from a contaminated room back to the environment may be controlled based on a detected level of the contaminant and a dilution ratio of any returned contaminated air to the total uncontaminated air supplied to the environment.

Abstract: A vent assembly has a vent cover and sliding air flow regulator for controlling the flow of air through the vent cover. Plural sets of unique couplers may be used to interconnect the air flow regulator and vent cover for relative sliding motion. Desirably, two such couplers are provided at each end of the assembly with an associated one of such couplers being adjacent to each of the corners of the assembly in the event a rectangular assembly is provided.

Abstract: An apparatus for venting several rooms having exhaust fans through existing roof openings made for existing ventilation systems, including turbine ventilators, roof ventilators, ridge ventilators and hip ventilators. The vent apparatus has two side panels, a bottom and two end panels. The apparatus is mounted under the roof ventilation system, using horizontal mounting elements disposed on the top edges of the end panels and side panels. When a ridge ventilator or hip ventilator is used, the end panels are formed with slots for fitting around the ridge rafter or hip rafter. The apparatus is mounted under the ridge ventilator, using mounting elements disposed along the slots on the end panels to attach the vent apparatus to the rafter. Each circular opening in the body had a stub extending downwardly for attachment of an end of the venting hose, which is connected to the bathroom exhaust vent fan. Removable covers can be placed into unused openings.

Abstract: A smoke exhauster includes a housing having an inclined plate extended forwardly and downwardly from an upper panel of the housing, a fan casing includes an upper panel secured to the upper plate of the housing to support one or more motors or fan devices, and includes a cut off portion formed in the front portion to receive the inclined plate of the housing and to allow the fan casing to be disposed forwardly relative to the housing, The fan casing and thus the fan device are disposed forwardly relative to the housing for allowing the fan device to effectively draw smoke or the like.

Abstract: An air conditioning duct to be positioned on a rear surface of a vehicular instrument panel (10). The duct (20) allows an air conditioning duct with complicated share to be formed of a plurality of separate cylindrical members (30 to 60). Joining the plurality of cylindrical members with a plurality of fixture members (71) allows the air conditioning duct to be obtained. The cylindrical members have leg portions (39A to 39C, 45, 55, 65) designed to be mounted to the instrument panel.

Abstract: A dryer vent outlet hood mounting device comprising a mounting block portion having a central opening, an interior peripheral wall about the central opening and a pair of planar, generally rectangular, peripheral flanges extending at right angles from and joined to the interior peripheral wall to define a peripheral channel for the receipt of siding, and a dryer vent outlet hood mounted on the exterior surface of one of the peripheral flanges. The central opening may include a central circular aperture for engagement with a dryer vent tube. The mounting block may include a variety of nailing members as well as the incorporation of a variety of score lines that permit adjustment of the size of the mounting block portion for adaptation to a variety of new and retrofit siding configurations. The dryer vent hood may also incorporate openable louvers and a bird or insect impermeable mesh over its outlet.

Abstract: A ventilation system for use with a peaked roof, the roof extending between lower-most extending edges disposed proximate to fascia boards and an upper-most extending peak. A plurality of interconnecting panels are assembled upon at least first and second angled sides of the roof, each of the panels exhibiting a length, width and thickness and defining a plurality of internal and lengthwise extending airflow passages. The panels are further interconnected along at least one of opposing side and end extending edges and so that the airflow passages align between the lower-most extending edges of the roof and the upper-most extending edges, associated with the peak. In this manner, airflow currents are drawn through the aligned airflow passages of the interconnected panels, in an upwardly angled manner, and exhausted along the extending peak.

Abstract: A two piece molded roof structure is provided for enclosing the cab of a work vehicle. The roof structure has an upper roof member mounted to a lower roof member. The lower roof member has a plurality of contours and apertures for receiving the components of an HVAC system, and for defining air passages. When the upper and lower roof members are joined discrete air passages are formed between the roof members. The roof structure includes fresh and recirculated air intakes communicating via an uncirculated air duct and with an HVAC core chamber housing an HVAC core. Filters are mounted in the air intakes. One or more blowers communicate between the core chamber and a conditioned air duct which has vents communicating with the cab interior. Air is thus drawn in through the intakes and directed through the unconditioned air duct to the HVAC core and then the blower expels the air into the conditioned air duct and into the vehicle cab.

Abstract: A regulator for regulating airflow through an air outlet includes a plurality of louver blades integrated with axis portions supported at bearing holes and interconnected through an interlocking member; a supporting plate with the bearing holes attached to an air outlet; and an elastic portion provided on the supporting plate to be capable of deforming along an axis of the louver blades. Also, the regulator may include a damper; a manual operating member for tilting the louver blades and damper; and two gears engaging each other and disposed at an interconnecting portion between the manual operating member and the damper. One of the gears is formed in two portions separated along an axis and provided coaxially. The two portions have slightly shifted pitch, and are able to displace with each other in a circumferential direction with elasticity.

Abstract: An integrated exterior inlet/exhaust port for providing two air channels through a wall while only requiring a single hole through the wall.

Abstract: A vent structure comprises an inlet-connector section, an outlet section, and a transition section between the inlet-connector section and outlet section. The inlet-connector section is at an inlet end of the vent structure and is adapted for connection with an inlet duct from which the vent structure receives a flow of air. The outlet section is at an outlet end of the vent structure and includes an outlet slot that is adapted to direct the flow of air into a room. The transition section has a flared portion that diverges in cross-sectional area as it extends generally toward the outlet section. The transition section has a constricted portion located between the inlet-connector section and the outlet slot. The constricted portion is also located substantially centrally within a plane that is generally perpendicular to a direction of air flow.

Abstract: A damper for allowing some degree of air flow (winter ventilation) through a roof mounted, conduit to aid in preventing the growth of black mold in an attic while aiding in heat retention during colder periods of the year. The low profile damper is comprised of a housing having a plurality of louvers pivotably mounted therein. A linkage strip interconnects the louvers together whereby a bimetal coil move the louvers in unison between their open and closed positions in response to temperature. The damper includes an air flow selector means that allows a “selected” closed position to be selected at which a predetermine volume of air is allowed to flow through the damper.

Abstract: In one aspect, a modular fan system includes a fan, a plenum member adapted to be mounted to the fan and adapted to be mounted to an enclosure, a gasket adapted to be mounted between the plenum member and the enclosure, a filter adapted to be mounted within the plenum member, and a grille adapted to be mounted to the plenum member. In the system, one or more of the fan, the plenum member, the gasket, the filter, and the grille are both assemblable into a first fan assembly and are alternatively assemblable into a second fan assembly. Another aspect also provides a stand-off collar adapted to be mounted to the enclosure, a first grille adapted to be mounted to the plenum member and adapted to be alternatively mounted to the stand-off collar, and an EMI/RFI shielding grille adapted to be mounted to the plenum member.

Abstract: An openable floor vent cover for use in preventing debris from entering a floor vent during construction is comprised of a board having a length and width larger than the vent to be covered. Then board is provided with a cut substantially in the shape and size of the vent to be covered. An airflow permable debris barrier is attached to the periphery of a first surface of the board. The portion of the board within the cut is removable to enable airflow from the vent as desired during construction, and may be replaced when airflow from the vent is no longer needed. The board is nailed to the subflooring surrounding the vent. The cover may be removed after construction.

Abstract: The invention discloses a smoke extraction system 10 provided with an infrared smoke detector 16, infrared thermostat 18, A/C sensor 38 and transition door 20. When the smoke detector 16 detects smoke 32 it sends a signal to the thermostat 18 changing the setting to exhaust mode, at the same time the signal is received by the A/C sensor 38 electronics of the transition door 20, which opens the transition door allowing smoke to be vented to the outside. When the air conditioning unit engages the vent mode, the air is vented through the transition door 20 thereby creating a draft that will remove the smoke 32 and vent it outside. The extraction system can be adapted to a central air conditioning system 12.

Abstract: A profiled ridge vent for tile roofs is provided having a vent strip located on each side of a roof ridge. Each vent strip includes a vent material, formed from a non-woven mat, including a first surface, contoured to a profile to match a profile of the tile roof, and a second surface. An upper water barrier is attached to the second surface of at least one of the vent strips and extends over the roof ridge. A water dam is attached to the first surface and extends in an up-slope direction toward the roof ridge. In use, a first vent strip is located on a first side of a roof ridge pole, and a second vent strip is located on a second side of the roof ridge pole. The upper water barriers of the first and second vent strips overlap one another at the ridge pole. Preferably, adhesive is provided on at least one of the upper water barriers so that the two water barriers are connected together. Alternatively, a single water barrier is provided which bridges the ridge pole and joins the first and second vent strips.

Abstract: A vehicle air-conditioning duct 1 has an oblong cross-sectional configuration. The air-conditioning duct 1 has a top wall 16, a bottom wall 18 and side walls 12, 14 enclosing an interior space and at least one constriction 22, 24 formed by a projection protruding from at least one of the top wall 16 and the bottom wall 18 into the air-conditioning duct 1 so as to connect the top wall 16 with the bottom wall 18. The constriction 22, 24 continuously extends in an air flow direction so that cross-sectional areas of the constriction 22, 24 are constant in the air flow direction.

Abstract: The present disclosure relates to an airflow control apparatus having a plurality of doors and outlets for controlling the airflow in a vehicular HVAC system. In one aspect, the apparatus (100) has a first chamber (106) controlled by a first door (126) and having a first outlet (110) and a first passage (127). A second chamber (129) is coupled to the first passage and also controlled by the first door. The second chamber has a second outlet (130) and a third outlet (160) which are each controlled by the second and third doors (232, 242). According to another aspect, a method of controlling airflow in a vehicular HVAC system is disclosed. The method comprises the steps of receiving (702) airflow into a first chamber; controlling the airflow out of the first chamber with a first door; controlling (704) the airflow from a second chamber to a driver zone with a second door; and controlling (706) the airflow from said second chamber to a passenger zone with a third door.

Abstract: An opening flap comprises a frame and a flap articulated thereto. A lift arm is provided, which is articulated by a principal energy accumulator. A secondary energy accumulator is articulated between the lift arm and the flap. The principal energy accumulator delivers the opening motion of the flap into a position before the dead center thereof. The secondary energy accumulator, which is distinctly weaker, delivers the subsequent opening motion.