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US 11,454,413 B2Granted
Blower with adjustable cutoff plate
AssigneeLennox Industries Inc.
InventorsPatric Ananda Balan Thobias, Amit Parsai, Shiliang Wang
Life of this patent
Estimating the term…
Abstract
A blower for an HVAC system, the blower includes a housing with an intake and an outlet, a fan or blower wheel disposed within the housing and configured to draw air into the housing via the intake and to exhaust air from the housing through the outlet, and an adjustable cutoff plate configured to be moved between at least a first position defining a first cutoff angle and a second position defining a second cutoff angle.
Claims17
A blower for an HVAC system, the blower comprising:
- a housing comprising an intake and an outlet;
- a blower wheel disposed within the housing and configured to draw air into the housing via the intake and to exhaust air from the housing through the outlet;
- a fixed cutoff plate fixed with respect to the housing;
- an adjustable cutoff plate configured to be moved between at least a first position defining a first cutoff angle and a second position defining a second cutoff angle;
- an HVAC controller configured to determine whether a static pressure of air exiting the blower exceeds a threshold value of 1.4 inches-water column and the adjustable cutoff plate is configured for an 80° cutoff angle;
- and
- responsive to a determination that the static pressure of air exiting the blower exceeds the threshold value and the adjustable cutoff plate is configured for the 80° cutoff angle, the HVAC controller moves the adjustable cutoff plate between the first position and the second position to change the 80° cutoff angle.
4 more elements
An HVAC system comprising:
- an indoor unit comprising:
- a blower comprising:
- a housing with an intake and an outlet;
- a blower wheel disposed within the housing and configured to draw air into the housing via the intake and to exhaust air from the housing through the outlet;
- a fixed cutoff plate fixed with respect to the housing;
- an adjustable cutoff plate configured to be moved between at least a first position defining a first cutoff angle and a second position defining a second cutoff angle;
- a pressure sensor configured to measure a static pressure of air exiting the blower;
- an HVAC controller configured to monitor the static pressure of the air exiting the blower and determine whether the static pressure of air exiting the blower exceeds a threshold value of 1.4 inches-water column and the adjustable cutoff plate is configured for an 80° cutoff angle;
- and
- responsive to a determination that the static pressure of air exiting the blower exceeds the threshold value and the adjustable cutoff plate is configured for the 80° cutoff angle, the HVAC controller moves the adjustable cutoff plate between the first and second positions to change the 80° cutoff angle.
7 more elements
A method of improving efficiency of a blower in an HVAC system, the method comprising:
- determining, by an HVAC controller of the HVAC system, if an enclosed space has a heating or cooling demand;
- responsive to a determination by the HVAC controller that the enclosed space has a heating or cooling demand, instructing, by the HVAC controller, the HVAC system to power on to satisfy the heating or cooling demand;
- determining, by the HVAC controller, that a static pressure of air exiting the blower exceeds a threshold value of 1.4 inches-water column and an adjustable cutoff plate is configured for an 80° cutoff angle;
- and
- responsive to the determination by the HVAC controller that the static pressure of air exiting the blower exceeds the threshold value and the adjustable cutoff plate is configured for the 80° cutoff angle, adjusting, relative to a fixed cutoff plate, a height of the adjustable cutoff plate of the blower to change the 80° cutoff angle to improve the efficiency of the blower.
2 more elements
Dependencies are inferred from the claim text.