US 12,687,866 B2Granted

System and method for controlling face velocity of a fume hood

AssigneeHoneywell International Inc.

InventorsWei Hua, James M. Barrette, David R. Boisvert, Liwen Yu, Robert S. Klamka, Mason R. Walls

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Abstract

A system for controlling a face velocity of a fume hood includes one or more sensors that are configured to detect one or more users in front of the fume hood. A controller is configured to determine a desired ventilation airflow rate for the fume hood based at least in part on the one or more users detected by the one or more sensors, wherein the desired ventilation airflow rate corresponds to one of three more available ventilation airflow rates. The controller is configured to provide a control signal to a ventilation device of the fume hood, wherein the control signal corresponds to the desired face velocity.

Claims18

Dependent claims

A system for controlling a ventilation device of a fume hood, the system comprising:

one or more sensors configured to detect one or more users in front of the fume hood;
a controller operatively coupled to the one or more sensors, the controller configured to:
determine a current activity of each of one or more users detected by the one or more sensors based on a current detection of a respective user and one or more past detections of the respective user;
determine a user activity profile based on the current activity of the each of the one or more users detected by the one or more sensors;
determine a desired ventilation airflow rate for the fume hood based on the one or more users detected by the one or more sensors, a sash position of a sash of the fume hood, and the user activity profile, wherein the desired ventilation airflow rate corresponds to one of three or more available ventilation airflow rates;
and
provide a control signal to the ventilation device, wherein the control signal corresponds to the desired ventilation airflow rate.

4 more elements

A system for controlling a ventilation device of a fume hood, the system comprising:

one or more sensors configured to detect one or more users in front of the fume hood;
a controller operatively coupled to the one or more sensors, the controller configured to:
determine a current activity of each of the one or more users detected by the one or more sensors based on a current detection of the respective user and one or more past detections of the respective user;
determine a user activity profile based on the current activity of the each of the one or more users detected by the one or more sensors;
determine a desired ventilation airflow rate for the fume hood based on the current activity of the respective user detected by the one or more sensors, a sash position of a sash of the fume hood, and the user activity profile;
and
provide a control signal to the ventilation device, wherein the control signal corresponds to the desired ventilation airflow rate.

4 more elements

A system for controlling a ventilation device of a fume hood, the system comprising:

two or more sensors configured to detect one or more users in front of the fume hood;
a controller operatively coupled to the two or more sensors, the controller configured to:
apply sensor fusion to merge data from the two or more sensors to increase a confidence level in a detection of the one or more users;
determine a current activity of each of the one or more users detected by the one or more sensors based on a current detection of a respective user and one or more past detections of the respective user;
determine a user activity profile based on the current activity of the each of the one or more users detected by the one or more sensors;
determine a desired ventilation airflow rate for the fume hood based on the one or more users detected by the two or more sensors, a sash position of a sash of the fume hood, and the user activity profile;
and
provide a control signal to the ventilation device, wherein the control signal corresponds to the desired ventilation airflow rate.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/127,618Filed 28 Mar 2023
Published: US 2024/0329670 A13 Oct 2024
Granted: 21 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F24F 11/0001
Control or safety arrangements: for ventilation
G05D 7/0676
Characterised by the type of regulator means: by action on flow sources
B08B 15/023
Using chambers or hoods covering the area: fume cabinets or cupboards, e.g. for laboratories
F24F 3/163
By purification, e.g. by filtering; by sterilisation; by ozonisation: clean air work stations, i.e. selected areas within a space which filtered…