US2024053045A1PendingUtilityA1

Airflow management systems and methods for filtered air systems

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Assignee: PREC AIR PRODUCTS COPriority: Aug 9, 2022Filed: May 17, 2023Published: Feb 15, 2024
Est. expiryAug 9, 2042(~16 yrs left)· nominal 20-yr term from priority
Inventors:Ted A. Folstad
F24F 11/75F24F 11/49F24F 11/63F24F 7/065F24F 11/77F24F 8/108F24F 2110/40F24F 2003/008
52
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Claims

Abstract

Systems and methods for controlling operation of one or more fans of an air handling system having one or more filters or filter banks. A current air volume at an inlet side of the fan(s) is determined. In some embodiments, the inlet side air volume is determined via sensed pressure at the inlet side (e.g., pressure transducer open to a flow station at the inlet side). A controller operates to control or regulate a speed of the fan in a manner that maintains a constant air volume through the air handling system, for example based upon a comparison of the current air volume at the fan with a target air volume.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method of operating an air handling system including a fan directing airflow through a filter, the method comprising:
 obtaining a current air volume at the fan;   comparing the current air volume with a target air volume; and   adjusting a speed of the fan based upon the comparison.   
     
     
         2 . The method of  claim 1 , wherein the step of comparing includes determining a difference between the current air volume and the target air volume. 
     
     
         3 . The method of  claim 1 , wherein the step of comparing includes determining an error rate as a percent difference between the current air volume and the target air volume. 
     
     
         4 . The method of  claim 1 , wherein the step of adjusting includes selecting a fan speed adjustment value from a plurality of adjustment values based upon a determined difference between the current air volume and the target air volume. 
     
     
         5 . The method of  claim 1 , further comprising:
 repeating the steps of obtaining, comparing and adjusting on a regular basis.   
     
     
         6 . The method of  claim 5 , wherein the regular basis is at least once every two minutes. 
     
     
         7 . The method of  claim 1 , wherein the step of obtaining includes determining an average air volume from a plurality of air volume measurement at the fan. 
     
     
         8 . The method of  claim 1 , wherein the step of obtaining includes measuring a differential pressure at the fan. 
     
     
         9 . The method of  claim 1 , wherein the step of obtaining includes interfacing with a flow station provided at the inlet side of the fan. 
     
     
         10 . The method of  claim 9 , wherein the step of obtaining further includes sensing a pressure at the flow station. 
     
     
         11 . The method of  claim 10 , wherein the step of obtaining further includes providing a pressure sensor open to the flow station. 
     
     
         12 . The method of  claim 1 , wherein the fan is one of a plurality of fans provided with air handling system, the method further comprising:
 obtaining a current air volume at each of the plurality of fans;   comparing the current air volume at each of the plurality of fans with a target air volume; and   adjusting a speed of the each of the plurality of fans based upon the corresponding comparison.   
     
     
         13 . The method of  claim 12 , wherein the same target air volume is utilized with each of the plurality of fans. 
     
     
         14 . The method of  claim 1 , further comprising:
 notifying a user when filter static pressure exceeds a static pressure capacity of the fan.

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