Wehr Corporation

Gordon C Sylvester

Konstantins Dravnieks

Dalny Travaglio

George Alexander

Rueben Zahler

An air diffuser includes first and second walls disposed in spaced side-by-side relationship and cooperating to define a passage for the flow of air in one direction between said walls. A pair of flanges extend towards each other from the downstream edges of the walls and defining an elongated outlet slot narrower than the width of said passage. A deflector vane is narrower than the passage and is disposed in the passage in a plane spaced upstream from the slot and generally parallel to said flanges. The deflector vane includes an inverted U-shaped central channel and flanges extending away from each other from the down stream ends of the U-shaped chanel and arranged generally parallel to the flanges defining the slot. The opposite ends of the vane are engaged in a U-shaped support with a spring engaging one wall of the U-shaped support and biasing the vane flanges into sliding engagement with the other wall. The vane thus being supported for back and forth edgewise movement in the plane to a first position in which the vane is closely adjacent to the first wall and spaced from the second wall, a second position in which the vane is closely adjacent the second wall, or selective positions between the two extremes.

Adjustable slot diffuser

The flow control unit includes a shell or housing defining a flow passage and a damper assembly disposed in the housing for controlling the volume of air flowing through the flow passage. The damper assembly includes a pivotally mounted damper blade which is partially surrounded by a pair of perforated members, one located upstream and the other located downstream of the damper blade pivot axis. Each of the perforated members have an arcuate cross-sectional shape and is disposed in close proximity to the travel path of one of the outer edges of the damper blade. The perforate members preferably have an open edge spaced from a longitudinal plane extending through the damper blade pivot axis. During initial damper blade travel from the closed position toward the open position, substantially all of the air flows through the perforations of the perforate members. During subsequent damper blade travel as the damper blade approaches the fully open position, an open flow passage exists between the damper blade and the open edges of the perforate members. The open edges of the perforate members preferably extend at an angle to the above plane so that the flow area of the open flow passage gradually increases as the damper blade approaches the fully open position.

Flow control unit for air distribution system

An inlet plenum extends into a control box and opens into the interior of the control box. Conditioned air is introduced into the box through the inlet plenum and flows from the box, to an area being serviced, through an outlet spaced from the plenum opening in the box. A damper is positioned at the plenum opening and it and the plenum at the opening having conforming shapes, i.e., segments of a circle. The damper closes over the discharge opening and, to vary the volume of air flowing through the box, pivots away from the opening about an axis offset from the center of the arc of the damper and the plenum opening. When the damper is closed on the plenum opening, the centers of the arcuate plenum opening and the damper are coincident and, relative to a central plane parallel to air flow through the plenum, are offset from that plane so that the damper is moved away from the plenum opening by air flow. The damper is closed against air flow pressure by inflation of an air bladder, air inflates the bladder being drawn from the air flow through the inlet plenum and the flow of air to the bladder being controlled in accordance with the temperature of the area being serviced and the volume of air flowing from the box. Air flow volume is determined for control purposes by sensing box pressure at the outlet. The interior walls of the box are acoustically treated and, for acoustical purposes, a dead air space is also defined between the discharge opening and the box outlet.

Variable volume control box and system incorporating same

Air flow volume in a delivery duct is sensed in the form of changes in duct pressure and the sensed pressure is fed back to a diaphragm assembly which is part of a thermostatic control located in the room to which hot or cold air is being delivered. Dependent upon the sensed pressure, the diaphragm assembly throttles a bleed opening in the supply line of a pneumatic actuator, which actuator determines the position of a damper in the duct to thereby control the volume of air flow in the duct. A bellows is also part of the thermostatic control and senses room temperature to establish a spring force on the diaphragm assembly and against which the sensed pressure must act. The bellows is adjustable to afford room temperature selection. The bellows and a compression spring act on a master lever, the compression spring reacts against the bellows force. The combination bellows-spring produces movement of the master lever in two opposite directions and this movement is utilized to activate a control for continuously switching the system between delivery of cold or hot air. The thermostatic control includes a second lever moved in response to the bellows-spring movement. The position of the second lever establishes a biasing force against which, in the diaphragm assembly, the sensed duct pressure must act in establishing the position of the damper. A cam arrangement is associated with this second lever and is effective to determine the position, and movement, of the lever so as to provide selection in the percent of available air capacity which is utilized and/or lever movement between maximum and minimum limits as desired.

Growing community of inventors

Verona, WI, United States of America

Gordon C Sylvester