Fluid control device with reduced sound generation
OwnerFrederick A. Lorch, Gordon Sharp +2inventors
InventorsFrederick A. Lorch, Gordon Sharp, Jerome Schaufeld, Richard Clayton
Life of this patent
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Abstract
A fluid control device with a reduced sound generation. The device is a nozzle-type valve that has a converging portion, a diverging portion and a throat therebetween. A diverging portion acts as a diffuser and may be conical or may have a slight curvature. In each, the diffusion angle is less than 20° so that turbulence of fluid flowing through the valve is minimized and a boundary layer is maintained between the fluid and an inside surface of the fluid control device. A control system that uses such a fluid control device is also disclosed and such device may be used either in a supply conduit or an exhaust conduit.
Claims19
A flow control device for reduced sound generation that controls the flow of fluid through a conduit, comprising:
- a body having an axis and defining a passage that allows fluid to flow from an upstream position to a downstream position, said valve body having a converging portion, a diverging portion and a throat between said converging and diverging portions, said diverging portion of said passageway having a predetermined diffusion angle and a length that is sufficient to reduce the sound created by the flow of fluids through said fluid control device;
- and,
- a flow regulator supported within said body for controlling the flow of fluid through the conduit.
A flow control device having a reduced sound generation that controls flow of fluid through a conduit comprising:
- a valve body having an axis and defining a passage that allows fluid to flow from an upstream position to a downstream position, said valve body having a converging portion, a diverging portion and a throat between said converging and diverging portion, said diverging portion having a predetermined diffuser angle for a sufficient length to reduce the sound created by the flow of fluid through said valve, and
- a fluid flow control mechanism mounted to said valve body that operates to control said volume of fluid flowing through said valve, said mechanism including;
- a flow control member disposed within said valve body at a position upstream of said throat, said flow control member having an outer periphery that forms a flow orifice within said passage,
- a shaft onto which said flow control member is mounted, said shaft being axially movable by said control mechanism.
A control system for ventilating a space with reduced noise generation, said control system comprising:
- a conduit connected to the space that is adapted to transport air;
- a blower fluidly connected to said conduit that forces air through said conduit;
- a flow control device disposed in said conduit for controlling said flow of fluid in said conduit;
- said flow control device having an axis and defining a passage that allows fluid to flow through said conduit and including a converging portion, a diverging portion, and a throat therebetween;
- said diverging portion having a predetermined diffusion angle for a length sufficient to reduce said generation of noise as fluid flows through said valve.
Dependencies are inferred from the claim text.