System and method for monitoring and detecting pathogens

Patent metadata

Field	Value
Publication number	US-12366563-B2
Application number	US-202117373560-A
Country	US
Kind code	B2
Filing date	Jul 12, 2021
Priority date	Jul 12, 2021
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

A method of identifying a location of pathogens in a structure including monitoring air within the structure for pathogens to set a baseline level, detecting a rise in pathogen density with respect to the baseline level, at least partially closing at least a first zone of the system, monitoring air from a second zone for a change in relative pathogen density to the previously detected pathogen density, and toggling the first zone and the second zone based on the change in relative pathogen density.

First claim

What is claimed is:

1. A method of identifying a location of pathogen source in a structure that is partitioned into a plurality of zones, each of the zones having a plurality of rooms, the method comprising:
monitoring, by a controller via a bio sensor, air within the structure for pathogens to set a baseline pathogen density,
wherein the bio sensor is located in a return duct of an air handling unit that is operationally coupled to the controller and cycles air through plurality of legs into respective ones of the plurality of rooms, and
wherein each of the plurality of legs includes one of a plurality of zone air valves controlled by the controller, and each of the air zone valves is initially opened;
detecting, by the controller from the monitoring of air in the return duct via the bio sensor, a rise in pathogen density with respect to the baseline pathogen density;
consecutively toggling to close and reopen, by the controller, all of the zone air valves in each one of the plurality of zones to identify one zone of the plurality of zones that has a relatively higher pathogen density, and keeping closed each one of the plurality of zones valves corresponding to one or more zones of the plurality of zones having a relatively lower pathogen density; and
consecutively toggling to close and reopen, by the controller, each one of the zone air valves in the one zone to identify one room of the plurality of rooms in the one zone that has a relatively higher pathogen density, to thereby identify a location of a pathogen source, and keeping closed each one of the plurality of zone air valves corresponding to one or more rooms of the plurality of rooms in the one zone with the relatively lower pathogen density.

2. The method of claim 1 , wherein the pathogen includes airborne pathogens, powders, or aerosols.

3. The method of claim 1 , wherein air flow to each zone is controlled by a respective variable-air-volume box.

4. The method of claim 1 , further comprising re-opening a first subset of a first zone and closing second zone if the relative pathogen density decreased.

5. The method of claim 4 , further comprising closing a second subset of the second zone if the relative pathogen density increased.

6. The method of claim 4 , further comprising closing a portion of the first subset of the first zone and progressively dividing an open subset of the first zone to identify a source of the pathogen.

7. The method of claim 5 , further comprising closing a portion of the first subset of the first zone and progressively dividing an open subset of the first zone to identify a source of the pathogen.

8. The method of claim 1 , wherein the first zone and the second zone are not the same volume.

9. The method of claim 1 , wherein the air is monitored by a single sensor.

10. The method of claim 9 , wherein the sensor is placed at a return-air location.

11. The method of claim 1 , wherein the method is controlled by an algorithm configured to toggle a respective one of the plurality of zone air valves to control air flowing through each one of the zones based on the change in relative pathogen density.

12. The method of claim 1 , wherein each of the zones are part of a building.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Lin Fu
• Taylor Russell
• Mosher Daniel A

Classifications

• F24F2110/65

  Concentration of specific substances or contaminants · CPC title

• F24F2110/64

  Airborne particle content · CPC title

• F24F11/74

  for controlling air flow rate or air velocity · CPC title

• F24F11/0001

  for ventilation (F24F11/30 takes precedence) · CPC title

• G01N33/0004 Primary

  Gaseous mixtures, e.g. polluted air · CPC title