Communications between thermostat and rooftop unit of climate control system

Patent metadata

Field	Value
Publication number	US-11397016-B2
Application number	US-202017129285-A
Country	US
Kind code	B2
Filing date	Dec 21, 2020
Priority date	Oct 17, 2016
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

According to certain embodiments, a thermostat is configured for use in a climate control system. The thermostat is operable to use two-way communication for communicating operational information between the thermostat and at least one rooftop unit (RTU) within the climate control system. For example, the two-way communication comprises sending first operational information to the RTU and receiving second operational information from the RTU. The operational information comprising one or more climate control commands, setpoints, configuration information, diagnostics, and/or sensor data. The thermostat is further operable to operate the climate control system based on the operational information communicated between the thermostat and the RTU.

First claim

The invention claimed is:

1. A thermostat for use in a climate control system, the thermostat configured to:
use two-way communication for communicating operational information between the thermostat and at least one rooftop unit (RTU) within the climate control system, the operational information comprising one or more of climate control commands, setpoints, configuration information, diagnostics, and sensor data; and
cause the RTU to operate to provide one or both of heating and cooling based at least in part on an initial setpoint indicated by the operational information communicated between the thermostat and the RTU or a user-indicated setpoint;
wherein the two-way communication comprises sending first operational information to the RTU and receiving second operational information from the RTU, wherein the second operational information received from the RTU comprises capability information indicating one or more climate control commands supported by the RTU, and wherein the first operational information sent to the RTU comprises one of the climate control commands supported by the RTU according to the received capability information.

2. The thermostat of claim 1 , wherein the thermostat is further configured to receive a temperature, a humidity level, or a carbon dioxide level from one or more sensors within a conditioned space, and wherein the first operational information comprises sensor data based on the received temperature, humidity level, or carbon dioxide level.

3. The thermostat of claim 1 , wherein the second operational information comprises sensor data based on a refrigerant discharge temperature, an outdoor air temperature, or an outdoor humidity level that the RTU receives from one or more sensors.

4. The thermostat of claim 1 , wherein the thermostat is further configured to:
cause the RTU to operate to provide one or both of heating and cooling based on the user-indicated setpoint for a pre-defined period of time; and
in response to determining that the pre-defined period time has elapsed, cause the RTU to revert to operating to provide one or both of heating and cooling based at least in part on the initial setpoint.

5. The thermostat of claim 2 , wherein the thermostat is further configured to:
determine a number of the one or more sensors within the conditioned space, wherein each sensor of the one or more sensors is not polarity sensitive; and
automatically adjust accommodation of the determined number of sensors when a sensor is one or both of added to and removed from the conditioned space.

6. The thermostat of claim 1 , wherein the thermostat further configured to:
detect when it is connected to multiple RTUs;
automatically adjust one or both of dampers for each RTU and heating/cooling votes for each RTU based on the number of RTUs connected to the thermostat.

7. The thermostat of claim 6 , the thermostat further configured to:
detect whether the one or more RTUs are configured for zoned operation or unzoned operation; and
automatically adjust one or both of dampers for each RTU and heating/cooling votes for each RTU based on whether the RTUs are configured for zoned operation or unzoned operation;
wherein zoned operation comprises using each RTU to control the climate in a different space and unzoned operation comprises using each RTU to control the climate in the same space.

8. A rooftop unit (RTU) controller for use in a climate control system, the RTU controller configured to:
use two-way communication for communicating operational information between the RTU controller and a thermostat within the climate control system, the operational information comprising one or more of climate control commands, setpoints, configuration information, diagnostics, and sensor data; and
cause a rooftop unit (RTU) associated with the RTU controller to operate to provide one or both of heating and cooling based at least in part on an initial setpoint indicated by the operational information communicated between the RTU controller and the thermostat or a user-indicated setpoint;
wherein the two-way communication comprises receiving first operational information from the thermostat and sending second operational information to the thermostat, wherein the second operational information that the RTU communicates to the thermostat comprises capability information indicating one or more climate control commands supported by the RTU, and wherein the first operational information that the RTU receives from the thermostat comprises one of the climate control commands supported by the RTU according to the capability information.

9. The RTU controller of claim 8 , wherein the RTU controller is further configured to:
cause the RTU to operate to provide one or both of heating and cooling based on the user-indicated setpoint for a pre-defined period of time; and
in response to determining that the pre-defined period time has elapsed, cause the RTU to revert to operating to provide one or both of heating and cooling based at least in part on the initial setpoint.

10. The RTU controller of claim 8 , wherein the first operational information comprises sensor data based on a temperature, a humidity level, or a carbon dioxide level that the thermostat receives from one or more sensors within a conditioned space.

11. The RTU controller of claim 8 , wherein the second operational information comprises sensor data based on a refrigerant discharge temperature, an outdoor air temperature, or an outdoor humidity level that the RTU receives from one or more sensors.

12. The RTU controller of claim 10 , wherein the RTU controller is further configured to:
determine a number of the one or more sensors within the conditioned space, wherein each sensor of the one or more sensors is not polarity sensitive; and
automatically adjust accommodation of the determined number of sensors when a sensor is one or both of added to and removed from the conditioned space.

13. A climate control system comprising a thermostat and a rooftop unit (RTU) comprising an RTU controller, the system configured to:
use two-way communication for communicating operational information between the RTU controller and the thermostat within the climate control system, the operational information comprising one or more of climate control commands, setpoints, configuration information, diagnostics, and sensor data; and
cause the RTU to operate to provide one or both of heating and cooling based at least in part on an initial setpoint indicated by the operational information communicated between the RTU controller and the thermostat or a user-indicated setpoint;
wherein the two-way communication comprises communicating first operational information from the thermostat to the RTU controller and communicating second operational information from the RTU controller to the thermostat, wherein the second operational information communicated from the RTU to the thermostat comprises capability information indicating one or more climate control commands supported by the RTU, and wherein the first operational information communicated from the thermostat to the RTU comprises one of the climate control commands supported by the RTU according to the capability information.

14. The climate control system of claim 13 , wherein the system is further configured to:
cause the RTU to operate to provide one or both of heating and cooling based on the user-indicated setpoint for a pre-defined period of time; and
in response to determining that the pre-defined period time has elapsed, cause the RTU to revert to operating to provide one or both of heating and cooling based at least in pa

Assignees

• Lennox Ind Inc

Inventors

• Abrishamkar Farhad
• Vishinsky Anna
• Bennett Alan E

Classifications

• Y02B30/70

  Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating · CPC title

• F24F11/62

  characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values · CPC title

• F24F11/50

  characterised by user interfaces or communication · CPC title

• F24F11/56

  Remote control · CPC title

• F24F1/06

  Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger · CPC title