Smart-home control system providing HVAC system dependent responses to hazard detection events

Patent metadata

Field	Value
Publication number	US-9905122-B2
Application number	US-201414508752-A
Country	US
Kind code	B2
Filing date	Oct 7, 2014
Priority date	Oct 7, 2013
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

Systems and methods for controlling a climate control system of a smart-home environment that includes a plurality of smart devices are provided. One method includes detecting, with a hazard detector of the smart devices, a level of carbon monoxide (CO) at the hazard detector that exceeds a threshold CO level at a location of the hazard detector, determining, by one of the smart devices, that the climate control system includes a combustion based heat source, and in response to the detecting and the determination, transmitting, by a system controller of the climate control system, a first signal to turn off at least one aspect of the climate control system.

First claim

What is claimed is:

1. A method for controlling a climate control system of a smart-home environment, the smart-home environment including a plurality of smart devices that comprises a plurality of hazard detectors, the method comprising:
detecting, with a hazard detector of the plurality of hazard detectors, a level of carbon monoxide (CO) at the hazard detector that exceeds a threshold CO level at a location of the hazard detector;
transmitting, by the hazard detector of the plurality of hazard detectors, via a low-power wireless communication protocol and a low-power wireless communication network, an indication of the detected level of CO at the hazard detector that exceeds the threshold CO level to one or more other smart devices of the plurality of smart devices;
translating, by a spokesman node of the low-power wireless communication network, the indication of the detected level of CO at the hazard detector that exceeds the threshold CO level from the low-power wireless communication protocol to a second wireless communication protocol, wherein the one or more other smart devices of the plurality of smart devices comprises the spokesman node;
transmitting, by the spokesman node of the low-power wireless communication network, the indication of the detected level of CO at the hazard detector that exceeds the threshold CO level to a system controller via a high-power wireless communication network and the second wireless communication protocol;
determining, by one of the smart devices, that the climate control system includes a combustion based heat source; and
in response to the detecting and the determination, transmitting, by the system controller of the climate control system, a first signal to turn off at least one aspect of the climate control system.

2. The method of claim 1 , wherein the one of the smart devices that determines that the climate control system includes a combustion based heat source, is the system controller.

3. The method of claim 2 , wherein the system controller receives information that the climate control system includes a combustion based heat source at a time of installation.

4. The method of claim 2 , wherein the system controller determines that the combustion based heat source is the source of a CO increase based on a temperature increase occurring concurrently with the CO increase.

5. The method of claim 1 , further comprising determining, by the one of the smart devices, that the combustion based heat source of the climate control system is in operation at the time of the detecting.

6. The method of claim 1 , wherein the first signal to turn off at least one aspect of the climate control system is a signal to turn off only the combustion based heat source of the climate control system.

7. The method of claim 1 , wherein the first signal to turn off at least one aspect of the climate control system is a signal to follow a predetermined shutdown sequence that sequentially turns off the combustion based heat source of the climate control system, and a system fan.

8. The method of claim 1 , further comprising transmitting, at the time of detecting by the hazard detector of the smart devices and over a wireless connection, information of the CO level at the hazard detector to an information system outside the smart-home environment.

9. The method of claim 1 , further comprising determining the threshold CO level prior to the detecting, by:
periodically measuring a level of CO by the hazard detector to generate baseline CO measurements; and
statistically evaluating the baseline CO measurements to determine the threshold CO level.

10. The method of claim 9 , further comprising:
periodically transmitting the baseline CO measurements, by the hazard detector and over a wireless connection, to an information system outside the smart-home environment; and
wherein statistically evaluating is performed by the information system.

11. The method of claim 9 , wherein statistically evaluating is performed by the system controller.

12. The method of claim 9 , wherein statistically evaluating is performed by the hazard detector.

13. The method of claim 9 , wherein statistically evaluating comprises:
associating each of the baseline CO measurements with a time of day that the measurement was taken;
grouping the baseline CO measurements into a first subset corresponding to a first time of day period and a second subset corresponding to a second time of day period; and
statistically evaluating the first subset to determine the threshold CO level as a first threshold corresponding to the first time of day period, and to determine a second threshold corresponding to the second time of day period.

14. The method of claim 9 , further comprising:
associating each of the baseline CO measurements with a time that the respective baseline CO measurement was taken;
periodically measuring at least one aspect of the smart-home environment to generate one or more activity related measurements;
associating each of the activity related measurements with a time that the respective activity related measurement was taken;
evaluating the activity related measurements to generate a set of times that are associated with a particular activity;
grouping the baseline CO measurements into a first subset of CO measurements that are associated in time with the particular activity, and a second subset of CO measurements that are associated in time with lack of the particular activity; and
statistically evaluating the baseline CO measurements to determine the threshold CO level as one of at least a first threshold associated in time with occurrences of the particular activity, and a second threshold associated in time with lack of the particular activity.

15. The method of claim 1 , further comprising transmitting, by the hazard detector of the smart devices and over a wireless connection, information that the CO level at the hazard detector has exceeded the threshold, to the system controller.

16. The method of claim 1 , wherein the system controller comprises a thermostat.

17. The method of claim 16 , further comprising, after transmitting the first signal:
detecting, with the hazard detector, a lower level of CO that does not exceed the threshold CO level;
not transmitting a second signal to turn on the aspect of the climate control system that was turned off with the first signal, based on the lower level of CO; and
upon receiving physical input at the thermostat to resume operation, transmitting the second signal to turn on the aspect of the climate control system that was turned off with the first signal.

18. The method of claim 16 , further comprising, after transmitting the first signal:
detecting, with the thermostat, a temperature of the thermostat that is below a low temperature safety threshold;
detecting, with the hazard detector, a level of CO that continues to exceed the threshold CO level; and
transmitting a second signal to turn on the aspect of the climate control system that was turned off with the first signal.

19. The method of claim 1 , further comprising:
responsive to detecting the level of carbon monoxide (CO) at the hazard detector that exceeds the threshold CO level, generating an audible alarm by one or more of the hazard detector and the system controller.

20. The method of claim 19 , further comprising:
receiving a gesture input at one or more of the hazard detector and the system controller; and
responsive to the gesture input, hushing the audible alarm, without

Assignees

• Google Inc
• Google Llc

Inventors

• Sloo David
• Webb Nicholas Unger
• Fisher Evan Jarman
• Matsuoka Yoky
• Fadell Anthony
• Rogers Matthew

Classifications

• H05B45/20

  Controlling the colour of the light · CPC title

• H05B47/11

  by determining the brightness or colour temperature of ambient light · CPC title

• H05B47/19

  via wireless transmission · CPC title

• H04L12/2809

  indicating that an appliance service is present in a home automation network (monitoring functionality H04L43/0817; discovery or management thereof, e.g. service location protocol [SLP] or web services, H04L67/51) · CPC title

• F24F11/30

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