Method and apparatus for producing a constant air flow from a blower by sensing blower housing vacuum
AssigneeJakel Incorporated
InventorsWilliam Stuart Gatley, Robert E. Jones
Life of this patent
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Abstract
An airflow control system for a blower providing the combustion air for an HVAC system comprises a single phase AC blower motor driving a blower wheel within a blower housing, a vacuum sensor mounted to the housing to sense the vacuum or pressure differential created by the blower as it operates, and a controller that receives as its only feedback signal a variable signal from the vacuum sensor which signal is proportional to the sensed vacuum within the housing and provides an output voltage to the blower motor to adjust the blower motor speed to thereby preferably produce a constant air flow.
Claims17
An airflow control system for controlling the flow of air produced by a blower, the blower comprising a blower motor mounted to drive the blower, the airflow system comprising a vacuum sensor for sensing the vacuum created by the blower as it operates, the vacuum sensor producing a variable signal in response to the vacuum sensed, a control connected to the vacuum sensor for receiving the variable signal, the control being connected to the blower motor to control its speed in response to the value of the variable signal and thereby control the flow of air produced by the blower.
A method for controlling the air flow produced by a blower comprising:
- sensing a pressure differential created by the blower during operation,
- providing a variable signal corresponding to the sensed pressure differential to a control, and
- in response to the variable signal, controlling the speed of a motor driving the blower.
Dependencies are inferred from the claim text.