Methods and systems for remotely monitoring and controlling HVAC units

• US 9,244,471 B2
• Filed: 03/14/2013
• Issued: 01/26/2016
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Siemens Industry Incorporated (Siemens AG)
• Original Assignee: Siemens Industry Incorporated (Siemens AG)
• Inventors: Watts, Laurie, Hafernik, Robert
• Primary Examiner(s): Barnes-Bullock, Crystal J
• Application Number:
  US13/829,874
• Publication Number:
  US 20140277768A1
• Time in Patent Office: 1,048 Days
• Field of Search: 700/9, 700/83, 700276-278, 236/1.C, 236/46.R, 236/51, 165/11.1, 165/205, 165/209, 165/212, 165/238
• US Class Current: 1/1
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/32 Responding to malfunctions or emergencies
• CPC Class Codes: F24F 11/38 Failure diagnosis
• CPC Class Codes: F24F 11/526 giving audible indications
• CPC Class Codes: F24F 11/56 Remote control
• CPC Class Codes: F24F 11/58 using Internet communication
• CPC Class Codes: F24F 11/64 using pre-stored data
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: G05D 23/1905 associated with tele control

Abstract

Systems, methods, and medium remotely monitor and control heating, ventilation and air-conditioning (HVAC) units. The method includes receiving by a processor via a communication network supply temperature data indicating a supply air temperature in a duct coupled to an HVAC unit. The method includes receiving by the processor via the communication network zone temperature data of a space being maintained by the HVAC unit. The method includes receiving by the processor via the communication network thermostat data from a thermostat in the space and analyzing by the processor at least one of the supply temperature data, the zone temperature data and thermostat data. The method includes generating by the processor a control signal responsive to the analysis and transmitting via the communication network the control signal to an HVAC controller, wherein the control signal causes the HVAC controller to control the HVAC unit.

Claims

1. A method for remotely monitoring and controlling a heating, ventilation and air-conditioning (HVAC) unit, the method comprising:

receiving by a processor via a communication network supply temperature data indicating a supply air temperature in a duct coupled to the HVAC unit, the processor located at a geographically remote location from the HVAC unit;

receiving by the processor via the communication network zone temperature data of a space maintained by the HVAC unit;

receiving by the processor via the communication network thermostat data from a thermostat in the space;

analyzing by the processor at least one of the supply temperature data, the zone temperature data and the thermostat data to determine whether the HVAC unit is malfunctioning;

generating by the processor a control signal responsive to the analysis; and

transmitting via the communication network the control signal to an HVAC controller, wherein the control signal causes the HVAC controller to transmit a disable signal to a thermostat causing the HVAC unit to be disabled by the thermostat.

2. The method of claim 1, wherein the control signal causes the HVAC controller to disable the HVAC unit.

3. The method of claim 1, further comprising:

periodically sensing the supply air temperature in the duct to generate the supply temperature data;

storing the supply temperature data in the HVAC controller; and

transmitting via the communication network the supply temperature data to the processor.

4. The method of claim 1, further comprising:

periodically sensing the zone temperature of the space to generate the zone temperature data;

storing the zone temperature data in the HVAC controller; and

transmitting via the communication network the zone temperature data to the processor.

5. The method of claim 1, further comprising:

periodically storing the thermostat data in the HVAC controller; and

transmitting via the communication network the thermostat data to the processor.

6. The method of claim 1, further comprising:

periodically polling the HVAC controller for the supply temperature data, the zone temperature data and the thermostat data; and

transmitting the supply temperature data, the zone temperature data and the thermostat data via the communication network to the processor responsive to the polling.

7. The method of claim 1, further comprising periodically transmitting by the HVAC controller the supply temperature data, the zone temperature data and the thermostat data via the communication network to the processor.

8. The method of claim 1, further comprising transmitting by the HVAC controller the supply temperature data, the zone temperature data and the thermostat data via the communication network to the processor when one or more data values change.

9. The method of claim 1, further comprising storing the zone temperature data, the supply temperature data and the thermostat data in a database connected to the processor.

10. The method of claim 1, further comprising generating the control signal to turn off the HVAC unit when the thermostat is set for cooling and a supply temperature is higher than a zone temperature.

11. The method of claim 1, further comprising generating the control signal to turn off the HVAC unit when the outside temperature is greater than a maximum threshold temperature and a supply temperature is greater than a zone temperature.

12. The method of claim 1, further comprising generating the control signal to turn off the HVAC unit when a thermostat is set for heating and the supply temperature is lower than the zone temperature.

13. The method of claim 1, further comprising generating the control signal to turn off the HVAC unit when the outside temperature is less than a maximum threshold temperature and the supply temperature is less than the zone temperature.

14. The method of claim 1, further comprising:

generating the control signal to turn off the HVAC unit for a predetermined time period;

transmitting the control signal over the communication network to the HVAC controller; and

transmitting a message indicating that the HVAC has been turned off for a predetermined time period.

15. A method for remotely monitoring and controlling a plurality of heating, ventilation and air-conditioning (HVAC) units, the method comprising:

receiving by a processor via a communication network respective supply air temperature data of the plurality of HVAC units, the processor located at a geographically remote location from the HVAC units;

receiving by the processor via the communication network zone temperature data of the plurality of HVAC units;

receiving by the processor via the communication network thermostat data of the plurality of HVAC units;

analyzing by the processor at least one of the supply temperature data, the zone temperature data and thermostat data of the plurality of HVAC units to determine whether one or more of the plurality of HVAC units are malfunctioning;

generating by the processor one or more control signals responsive to the analysis; and

transmitting via the communication network the one or more control signals to an HVAC controller, wherein the one or more control signal causes the HVAC controller to transmit a disable signal to a thermostat causing the one or more malfunctioning HVAC units to be disabled by the thermostat.

16. The method of claim 15, further comprising:

turning off the one or more malfunctioning HVAC units in response to the one or more control signals; and

transmitting a message indicating that the one or more HVAC units have been turned off for a predetermined time period.

17. The method of claim 15, further comprising:

periodically sensing an air temperature in a duct to generate the supply temperature data;

storing the supply air temperature data in the HVAC controller; and

transmitting via the communication network the supply temperature data to the processor.

18. The method of claim 15, further comprising:

periodically sensing a temperature of a space to generate the zone temperature data;

storing the zone temperature data in the HVAC controller; and

transmitting via the communication network the zone temperature data to the processor.

19. The method of claim 15, further comprising:

periodically storing the thermostat data in the HVAC controller; and

transmitting via the communication network the thermostat data to the processor.

20. The method of claim 15, further comprising:

periodically polling the HVAC controller for the supply temperature data, the zone temperature data and the thermostat data; and

transmitting the supply temperature data, the zone temperature data and the thermostat data via the communication network to the processor responsive to the polling.

21. The method of claim 15, further comprising periodically transmitting by the HVAC controller the supply temperature data, the zone temperature data and the thermostat data via the communication network to the processor.

22. The method of claim 15, further comprising transmitting by the HVAC controller the supply temperature data, the zone temperature data and the thermostat data via the communication network to the processor when one or more data values change.

23. The method of claim 15, further comprising storing the zone temperature data, the supply temperature data and the thermostat data in a database connected to the processor.

24. A data processing system configured to monitor and control a heating, ventilation and air-conditioning (HVAC) unit, the data processing system being located at a geographically remote location from the HVAC unit, the data processing system comprising:

a storage device comprising an HVAC application;

an accessible memory comprising instructions of the HVAC application; and

a processor configured to execute the instructions of the HVAC application to;

receive via a communication network supply temperature data indicating a supply air temperature in a duct coupled to the HVAC unit;

receive via the communication network zone temperature data of a space being maintained by the HVAC unit;

receive via the communication network thermostat data from a thermostat in the space;

analyze at least one of the supply temperature data, the zone temperature data and thermostat data to determine whether the HVAC unit is malfunctioning;

generate a control signal responsive to the analysis; and

transmit via the communication network the control signal to an HVAC controller, wherein the control signal causes the HVAC controller to transmit a disable signal to a thermostat causing the HVAC unit to be disabled by the thermostat.

25. The data processing system of claim 24, wherein the processor is further configured to execute the instructions of the HVAC application to:

generate the control signal to turn off the HVAC unit for a predetermined time period;

transmit the control signal over the communication network to the HVAC controller; and

transmit a message indicating that the HVAC has been turned off for a predetermined time period.

26. A non-transitory computer-readable medium encoded with executable instructions that, when executed, cause one or more data processing systems to:

receive via a communication network supply temperature data indicating an air temperature in a duct coupled to an HVAC unit;

receive via the communication network zone temperature data of a space being maintained by the HVAC unit;

receive via the communication network thermostat data from a thermostat in the space;

analyze at least one of the supply temperature data, the zone temperature data and thermostat data to determine whether the HVAC unit is malfunctioning;

generate a control signal responsive to the analysis; and

transmit via the communication network the control signal to an HVAC controller, wherein the control signal causes the HVAC controller to transmit a disable signal to a thermostat causing the HVAC unit to be disabled by the thermostat.