Variable airflow volume balancing using a variable airflow volume controller

Patent metadata

Field	Value
Publication number	US-9939168-B2
Application number	US-201414527888-A
Country	US
Kind code	B2
Filing date	Oct 30, 2014
Priority date	Oct 30, 2014
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

Variable airflow volume balancing using a variable airflow volume controller is described herein. One method includes receiving, by a variable airflow volume controller, a command from a computing device to begin variable airflow volume balancing. The method can include performing a balancing function using the variable airflow volume controller in response to the command, wherein the balancing function is performed independent of the computing device.

First claim

What is claimed:

1. A method for variable airflow volume balancing, comprising:
receiving, by a variable airflow volume controller, a command from a computing device to begin variable airflow volume balancing;
performing a balancing function using the variable airflow volume controller in response to the command, wherein the command is performed independent of the computing device;
storing a start time to begin performing the balancing function;
starting a counter to indicate an elapsed time of the balancing function;
ending the balancing function in response to the counter reaching or exceeding a threshold elapsed time; and compare measured airflow data to sensed airflow data to data to calibrate the variable airflow volume controller.

2. The method of claim 1 , including receiving, by the variable airflow volume controller from the computing device, an additional command to end the balancing function.

3. The method of claim 1 , including receiving an airflow set point from the computing device.

4. The method of claim 1 , including maintaining a current balancing state independent of the computing device.

5. The method of claim 1 , including storing a current balancing state of a reached set point in response to reaching an airflow set point.

6. The method of claim 1 , including restarting performance of the balancing function in response to a power cycle affecting the variable airflow volume controller.

7. The method of claim 1 , including sending an indication to the computing device indicating a current balancing state in response to a connection of communication between the variable airflow volume controller and the computing device.

8. A variable airflow volume controller, comprising:
a computing component configured to:
perform a balancing function in response to a command from a computing device to begin variable airflow volume balancing, wherein the balancing function is performed independent of the computing device;
track an elapsed time of the balancing function;
maintain a current balancing state of the balancing function;
send the current balancing state to the computing device in response to a communication connection between the variable airflow volume controller and the computing device; and
compare measured airflow data to sensed airflow data to calibrate the variable airflow volume controller.

9. The variable airflow volume controller of claim 8 , wherein the balancing function is based on a proximity of a current sensed airflow of a variable airflow volume box associated with the variable airflow volume controller to an airflow set point and the elapsed time of the balancing function.

10. The variable airflow volume controller of claim 8 , wherein the balancing function is stored as firmware on the variable airflow volume controller.

11. The variable airflow volume controller of claim 8 , wherein the computing component is configured to receive the balancing function from the computing device.

12. A variable airflow volume balancing system, comprising:
a computing device configured to communicate with a plurality of variable airflow volume controllers;
at least one router configured to provide a communication interface between the computing device and the plurality of variable airflow volume controllers; and
the plurality of variable airflow volume controllers, wherein each of the plurality of variable airflow volume controllers is configured to:
receive a balancing command from the computing device to begin variable airflow volume balancing;
perform a balancing function independent of the computing device in response to receiving the balancing command;
restart performance of the balancing function in response to a power cycle affecting the variable airflow volume controller;
send an indication to the computing device that an airflow set point is reached in response to a communication connection established with the computing device;
receive measured airflow data from the computing device in response to the indication; and
compare the measured airflow data to sensed airflow data to calibrate the variable airflow volume controller; and

wherein the computing device is configured to send a command to end variable airflow volume balancing in response to the indication that the airflow set point is reached.

13. The variable airflow volume balancing system of claim 12 , wherein the computing device is configured to send the balancing command to a subset of the plurality of variable airflow volume controllers to begin variable airflow volume balancing and wherein each of the subset performs the balancing function independent of the computing device.

14. The variable airflow volume balancing system of claim 13 , wherein the each variable airflow volume controller in the subset maintains a current balancing state of the balancing function.

15. The variable airflow volume balancing system of claim 12 , wherein the at least one router includes a building automation and control network (BACnet) router connected to at least a subset of the plurality of variable airflow volume controllers.

16. The variable airflow volume system of claim 12 , wherein the computing device is configured to group the plurality of variable airflow volume controllers into a number of groups and wherein a subset of the plurality of variable airflow volume controllers in each group is configured to perform the balancing function concurrently.

Assignees

• Honeywell Int Inc

Inventors

• Krishnasamy Balaji
• Karunakaran Deenadayalan

Classifications

• F24F11/04 Primary

  Mechanical Engineering · mapped topic

• F24F2011/0068

  Mechanical Engineering · mapped topic

• F24F11/006

  Mechanical Engineering · mapped topic

• F24F11/74 Primary

  for controlling air flow rate or air velocity · CPC title

• F24F11/30 Primary

  for purposes related to the operation of the system, e.g. for safety or monitoring · CPC title