Fresh air flow modulation device
First Claim
Patent Images
1. A device for monitoring and modulating the admission of fresh air into a building, the device comprising:
- a housing;
a sensor, associated with the housing and operable to measure airflow through the housing;
a damper including at least two damper blades;
a linking mechanism causing said at least two damper blades to move in synchronized but mirror image fashion; and
a drive mechanism which returns the damper to a closed position in the event of a power loss;
wherein each damper blade includes a shaft rotatably attached to the housing at least at a first shaft end, the shaft being located on the surface of the damper blade so as to divide the surface into first and second substantially equal areas;
wherein each damper blade is substantially planar with a first substantially straight edge and a second curved edge;
wherein the first substantially straight edges of said at least two damper blades engage; and
wherein the housing is circular and the second curved edges of the at least two damper blades sealingly engage the housing.
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Accused Products
Abstract
A device for monitoring and modulating the admission of fresh air into a building. The device comprises a housing; a sensor associated with the housing and operable to measure airflow through the housing; and a damper including at least two damper blades. Each damper blade includes a shaft rotatably attached to the housing at least at a first shaft end. The shaft is located on the surface of the damper blade so as to divide the surface into first and second substantially equal areas.
70 Citations
35 Claims
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1. A device for monitoring and modulating the admission of fresh air into a building, the device comprising:
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a housing; a sensor, associated with the housing and operable to measure airflow through the housing; a damper including at least two damper blades; a linking mechanism causing said at least two damper blades to move in synchronized but mirror image fashion; and a drive mechanism which returns the damper to a closed position in the event of a power loss; wherein each damper blade includes a shaft rotatably attached to the housing at least at a first shaft end, the shaft being located on the surface of the damper blade so as to divide the surface into first and second substantially equal areas; wherein each damper blade is substantially planar with a first substantially straight edge and a second curved edge; wherein the first substantially straight edges of said at least two damper blades engage; and wherein the housing is circular and the second curved edges of the at least two damper blades sealingly engage the housing. - View Dependent Claims (2, 3, 4, 5)
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6. A device for monitoring and modulating the admission of fresh air into a building, the device comprising:
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a housing; a sensor, associated with the housing and operable to measure airflow through the housing; a damper including at least two damper blades; and circuitry to improve the measurement resolution of the sensed airflow where the circuitry includes an arrangement for dithering the sensed analog signal; wherein each damper blade includes a shaft rotatably attached to the housing at least at a first shaft end, the shaft being located on the surface of the damper blade so as to divide the surface into first and second substantially equal areas. - View Dependent Claims (7, 8)
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9. A device for monitoring and modulating the admission of fresh air into a building, the device comprising:
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a housing; a sensor, associated with the housing and operable to measure airflow through the housing; and a damper including at least two damper blades; wherein each damper blade includes a shaft rotatably attached to the housing at least at a first shaft end, the shaft being located on the surface of the damper blade so as to divide the surface into first and second substantially equal areas; and wherein the surface of each damper blade is curved. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An airflow modulation device comprising a housing, the housing supporting:
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a flow ring; a first damper blade; a second damper blade; and circuitry, associated with the flow ring, for converting a sensed analog signal into a digital signal by dithering the sensed analog signal and converting the dithered signal to a digital signal; wherein each of the first and second damper blades includes a first edge which is substantially straight, and a second edge which is substantially arced, a shaft being attached to each damper blade in the plane of the damper blade, the shaft being movably attached to the housing and located so as to divide the surface of the damper blade into first and second surfaces where the area of the first surface is substantially identical to the area of the second surface; and wherein a shaft is not located on the damper blade surface at the midpoint of a perpendicular line taken from the midpoint of the straight edge. - View Dependent Claims (24)
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25. A flow swirl generator comprising:
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a housing; at least two damper blades each having a non-planar surface and each centroidally supported by a shaft where the shaft has a first end rotatably supported by the housing and a second end rotatably supported by a central pivot point. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A flow modulation device comprising:
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a housing; at least a pair of damper blades each damper blade moveably supported within the housing by a shaft rotationally associated with the housing at a first shaft end; a flow sensor mounted within the housing and operable to measure airflow through the housing; and an actuator operable to control movement of the damper blades, the actuator being located external of and associated with the housing; wherein each damper blade has a semicircular shape which is separated by the shaft into two regions of approximately equal area; and wherein the actuator automatically disengages from the damper blades in the event of a power loss.
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Specification