Temperature control valve

Patent metadata

Field	Value
Publication number	US-11761667-B2
Application number	US-202016926287-A
Country	US
Kind code	B2
Filing date	Jul 10, 2020
Priority date	Aug 25, 2017
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

The present disclosure relates to a heating, ventilation, and air conditioning (HVAC) system that includes a heat exchanger configured to circulate a working fluid therethrough, a valve configured to regulate a flow rate of the working fluid through the heat exchanger, and a valve controller configured to modify a valve position control signal received from an external controller, separate from the valve controller, based on a temperature differential of the working fluid entering and exiting the heat exchanger.

First claim

The invention claimed is:

1. A control system, comprising:
a valve configured to regulate a flow rate of working fluid through a heat exchanger;
an actuator coupled to the valve and configured to drive operation of the valve, wherein the actuator comprises a motor;
a controller comprising programmable processing circuitry configured to execute instructions for operating the actuator based on an input signal received by the controller;
a sensor configured to provide feedback, wherein the input signal comprises the feedback, and wherein the sensor comprises:
a position sensor configured to provide the feedback, wherein the feedback is indicative of a position of the motor; or
a current sensor configured to provide the feedback, wherein the feedback is indicative of an electric current supplied to the motor; and

a chassis, wherein the actuator and the controller are packaged within the chassis, and the controller is configured to receive the instructions from a remote server.

2. The control system of claim 1 , wherein the programmable processing circuitry comprises one or more field programmable gate arrays (FPGAs).

3. The control system of claim 1 , comprising one or more additional sensors, wherein the input signal comprises additional feedback received from the one or more additional sensors.

4. The control system of claim 3 , wherein the one or more additional sensors comprise:
a first temperature sensor configured to detect an inlet temperature of the working fluid entering the heat exchanger,
a second temperature sensor configured to detect an outlet temperature of the working fluid exiting the heat exchanger,
a third temperature sensor configured to detect an ambient temperature within a space conditioned by the heat exchanger, or
any combination thereof.

5. The control system of claim 1 , wherein the programmable processing circuitry is configured to execute the instructions to output a pulse width modulated (PWM) direct current (DC) motor command to control a speed of the motor.

6. A valve control system, comprising:
a valve;
an actuator coupled to the valve and configured to adjust a position of the valve;
a valve controller comprising a memory device and a processor, wherein the memory device is configured to store instructions for execution by the processor, and the processor is configured to:
receive a first signal indicative of an inlet temperature of a working fluid entering a heat exchanger;
receive a second signal indicative of an outlet temperature of the working fluid exiting the heat exchanger;
determine a temperature differential between the inlet temperature and the outlet temperature based on the first signal and the second signal; and
execute the instructions to operate the actuator to adjust the position of the valve based on a comparison of the temperature differential and a temperature differential setpoint; and

a chassis, wherein the actuator and the valve controller are housed within the chassis.

7. The valve control system of claim 6 , wherein the valve controller is configured to be communicatively coupled to a temperature sensor configured to acquire temperature feedback of the working fluid circulating through the heat exchanger, wherein the temperature sensor is configured to provide the first signal or the second signal.

8. The valve control system of claim 6 , wherein the processor comprises one or more field programmable gate arrays (FPGAs).

9. The valve control system of claim 6 , wherein the valve controller is configured to receive the instructions from a remote server.

10. A heating, ventilation, and air conditioning (HVAC) system, comprising:
an HVAC component having a chassis;
an actuator disposed within the chassis, wherein the actuator is configured to drive operation of the HVAC component; and
a controller comprising programmable processing circuitry, wherein the controller is disposed within the chassis, and the programmable processing circuitry is configured to:
execute instructions to operate the actuator based on an input signal received by the controller;
receive a first signal indicative of an inlet temperature of a working fluid entering a heat exchanger of the HVAC system;
receive a second signal indicative of an outlet temperature of the working fluid exiting the heat exchanger, wherein the input signal comprises the first signal and the second signal;
determine a temperature differential between the inlet temperature and the outlet temperature based on the first signal and the second signal; and
control operation of the actuator based on a comparison of the temperature differential and a temperature differential setpoint.

11. The HVAC system of claim 10 , comprising a remote server, wherein the controller is configured to receive the instructions from the remote server.

12. The HVAC system of claim 10 , comprising the heat exchanger, wherein the HVAC component comprises a valve configured to regulate a flow of the working fluid through the heat exchanger, and wherein the actuator is coupled to the valve to adjust a position of the valve based on the instructions executed by the programmable processing circuitry.

13. The HVAC system of claim 10 , wherein the input signal comprises sensor feedback from a sensor of the HVAC system that is indicative of an operating parameter of the HVAC system.

14. The HVAC system of claim 10 , wherein the controller is configured to receive, from an external controller of the HVAC system that is separate from the controller, a third signal for controlling the actuator, and wherein the controller is configured to operate the actuator based on the comparison of the temperature differential and the temperature differential setpoint, without utilizing the third signal.

Assignees

• Johnson Controls Tech Co

Inventors

• Passoni Marcello
• Pozo Alejandro Gonzalez
• Andreoni Gabriele Francesco Giuseppe

Classifications

• F24F11/84 Primary

  using valves · CPC title

• F24F2140/20

  Heat-exchange fluid temperature · CPC title

• F24F2110/10

  Temperature · CPC title

• F24F11/74

  for controlling air flow rate or air velocity · CPC title

• F24F11/64

  using pre-stored data · CPC title