Systems and methods for adjustment of heat exchanger position

Patent metadata

Field	Value
Publication number	US-10921015-B2
Application number	US-201816116753-A
Country	US
Kind code	B2
Filing date	Aug 29, 2018
Priority date	Aug 28, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system including a heating coil and an actuation system configured to couple to the heating coil. The actuation system is configured to rotatably position the heating coil in a first orientation crosswise to an airflow path in a heating mode, and rotatably position the heating coil in a second orientation substantially removed from the airflow path in a cooling mode.

First claim

The invention claimed is:

1. A heating, ventilation, and/or air conditioning (HVAC) system, comprising:
a heating coil; and
an actuation system configured to couple to the heating coil, wherein the actuation system comprises an actuator and a tether configured to extend between the actuator and the heating coil, wherein the actuator is configured to retrieve and release the tether to rotatably position the heating coil in a first orientation crosswise to an airflow path in a heating mode and to rotatably position the heating coil in a second orientation substantially removed from the airflow path in a cooling mode.

2. The HVAC system of claim 1 , wherein the tether comprises a chain, wherein a distal end of the chain is coupled to a case of the heating coil.

3. The HVAC system of claim 1 , wherein the heating coil is configured to circulate a heated water flow during the heating mode.

4. The HVAC system of claim 1 , comprising an enclosure having the heating coil and defining the airflow path, wherein the heating coil is rotatably coupled to the enclosure via a hinge assembly, wherein the hinge assembly comprises:
an upper guide coupled to the enclosure;
a lower guide coupled to the heating coil; and
a rod extending through the upper guide and the lower guide, wherein the rod is fixedly coupled to the lower guide and rotatably coupled to the upper guide.

5. The HVAC system of claim 1 , wherein the actuation system comprises
a controller communicatively coupled to the actuator, wherein the controller is configured to actuate the actuator based on feedback indicative of an operating parameter of the HVAC system.

6. The HVAC system of claim 5 , wherein the feedback indicative of the operating parameter is provided by a sensor, and wherein the operating parameter comprises a temperature of an exhaust air flow within the airflow path, a temperature of an outdoor air flow within the airflow path, a temperature of a conditioned air flow within the airflow path, a flow rate of heated water circulating through the heating coil, a flow rate of refrigerant circulating through an evaporator within the airflow path, or a combination thereof.

7. The HVAC system of claim 5 , comprising an enclosure defining the airflow path and having the heating coil and the actuation system, wherein the actuator is coupled to the enclosure.

8. The HVAC system of claim 1 , wherein the heating coil comprises an inlet configured to receive a heated water flow from a heated water source and an outlet configured to discharge the heated water flow to the heated water source, and wherein the inlet and the outlet are fluidly coupled to the heated water source via flexible conduits.

9. The HVAC system of claim 1 , comprising an evaporator disposed adjacent the heating coil within the airflow path in the first orientation, wherein the heating coil is oriented generally parallel to the evaporator in the first orientation.

10. The HVAC system of claim 9 , wherein a case of the heating coil is configured to engage with a case of the evaporator in the first orientation, and wherein the HVAC system comprises a gasket coupled to the case of the heating coil, the case of the evaporator, or both.

11. The HVAC system of claim 1 , comprising an enclosure defining the airflow path and having the heating coil, wherein the enclosure comprises a support bracket, wherein the support bracket is actuatable to retain the heating coil in the second orientation in the cooling mode.

12. The HVAC system of claim 1 , wherein the HVAC system comprises a rooftop unit having the heating coil and the actuation system.

13. A heating, ventilation, and/or air conditioning (HVAC) system, comprising:
a heating coil;
an actuation system coupled to the heating coil and configured to rotate the heating coil; and
a controller configured to regulate operation of the actuation system to rotate the heating coil between a first orientation and a second orientation based on a comparison of an operating parameter of the HVAC system to a target value associated with the operating parameter, wherein the heating coil is disposed within an airflow path of the HVAC system in the first orientation, and wherein the heating coil is substantially removed from the airflow path in the second orientation.

14. The HVAC system of claim 13 , wherein the controller is configured to regulate operation of the actuation system to rotate the heating coil between the first orientation and the second orientation in response to a determination that a value associated with the operating parameter deviates from the target value associated with the operating parameter by a threshold amount.

15. The HVAC system of claim 14 , wherein the threshold amount comprises a predetermined percentage of the target value of the operating parameter.

16. The HVAC system of claim 14 , wherein the controller is configured to receive feedback indicative of the value of the operating parameter from a sensor, and wherein the operating parameter comprises a temperature of an air flow within the airflow path, a temperature within a thermal load configured to receive the airflow, a temperature of ambient air exterior to the HVAC system, a flow rate of heated water circulating through the heating coil, a flow rate of refrigerant circulating through an evaporator disposed within the airflow path, or a combination thereof.

17. The HVAC system of claim 13 , wherein the actuation system comprises an actuator configured to retrieve and release a tether coupled to and extending between the actuator and the heating coil to rotate the heating coil, wherein the controller is communicatively coupled to the actuator and configured to instruct the actuator to transition the heating coil from the first orientation to the second orientation when a value associated with the operating parameter exceeds the target value associated with the operating parameter by a threshold amount.

18. The HVAC system of claim 17 , wherein the controller is configured to instruct the actuator to transition the heating coil from the second orientation to the first orientation when the value associated with the operating parameter falls below the target value associated with the operating parameter by the threshold amount.

19. The HVAC system of claim 13 , comprising an enclosure defining the airflow path and having the heating coil, and comprising a support bracket coupled to the enclosure, wherein the support bracket is movable between a first position and a second position, wherein the support bracket, in the first position, is configured to retain the heating coil in the second orientation, and wherein the support bracket is configured to enable rotational movement of the heating coil in the second position.

20. The HVAC system of claim 19 , comprising an actuator coupled to the support bracket and configured to transition the support bracket between the first position and the second position, wherein the controller is communicatively coupled to the actuator and is configured to instruct the actuator to transition the support bracket between the first position and the second position based on the operating parameter of the HVAC system.

21. The HVAC system of claim 20 , wherein the controller is configured to instruct the actuator to position the support bracket in the first position upon a determination that the actuation system has fully transitioned the heating coil to the second orientation.

22. The HVAC system of claim 13 , comprising an

Assignees

• Johnson Controls Tech Co

Inventors

• Rajendran Vinoraj
• Mohammad Mujibul R
• Bhosale Anil V
• Devkhile Ganesh S

Classifications

• F24F13/30

  Arrangement or mounting of heat-exchangers · CPC title

• F24F2221/16

  mounted on the roof · CPC title

• F24D2220/06

  Heat exchangers · CPC title

• F24D19/1084

  for air heating systems · CPC title

• F24F11/89 Primary

  Arrangement or mounting of control or safety devices · CPC title