Multi-nodal thermostat control system

• US 9,618,223 B2
• Filed: 07/28/2015
• Issued: 04/11/2017
• Est. Priority Date: 10/06/2004
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Google Inc. (Alphabet Inc.)
• Inventors: Kates, Lawrence
• Primary Examiner(s): NORMAN, MARC E
• Application Number:
  US14/811,526
• Publication Number:
  US 20150330657A1
• Time in Patent Office: 623 Days
• CPC Class Codes: F24F 1/022 comprising a compressor cycle
• CPC Class Codes: F24F 11/0001 for ventilation F24F11/30 takes precedence
• 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 11/46 Improving electric energy efficiency or saving
• CPC Class Codes: F24F 11/52 Indication arrangements, e.g. displays
• CPC Class Codes: F24F 11/523 for displaying temperature data
• CPC Class Codes: F24F 11/54 using one central controller connected to several sub-controllers
• CPC Class Codes: F24F 11/56 Remote control
• CPC Class Codes: F24F 11/58 using Internet communication
• CPC Class Codes: F24F 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: F24F 11/66 Sleep mode
• CPC Class Codes: F24F 11/70 Control systems characterised by their outputs; Constructional details thereof
• CPC Class Codes: F24F 11/72 for controlling the supply of treated air, e.g. its pressure
• CPC Class Codes: F24F 11/74 for controlling air flow rate or air velocity
• CPC Class Codes: F24F 11/76 by means responsive to temperature, e.g. bimetal springs
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 11/83 by controlling the supply of heat-exchange fluids to heat-exchangers
• CPC Class Codes: F24F 2110/00 Control inputs relating to air properties
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2110/40 Pressure, e.g. wind pressure
• CPC Class Codes: F24F 2120/00 : Control inputs relating to users or occupants
• CPC Class Codes: F24F 2120/10 : Occupancy
• CPC Class Codes: F24F 2140/40 : Damper positions, e.g. open or closed
• CPC Class Codes: F24F 3/044 : Systems in which all treatment is given in the central station, i.e. all-air systems
• CPC Class Codes: F24F 7/10 : with air supply, or exhaust, through perforated wall, floor or ceiling outlet members for directing or distributing air into rooms or spaces, e.g. ceiling air-diffusers F24F13/06
• CPC Class Codes: G05D 23/1934 : each space being provided with one sensor acting on one or more control means

Abstract

An Electronically-Controlled Register vent (ECRV) that can be easily installed by a homeowner or general handyman is disclosed. The ECRV can be used to convert a non-zoned HVAC system into a zoned system. The ECRV can also be used in connection with a conventional zoned HVAC system to provide additional control and additional zones not provided by the conventional zoned HVAC system. In one embodiment, the ECRV is configured have a size and form-factor that conforms to a standard manually-controlled register vent. In one embodiment, a zone thermostat is configured to provide thermostat information to the ECRV. In one embodiment, the zone thermostat communicates with a central monitoring system that coordinates operation of the heating and cooling zones.

Claims

1. A multi-nodal thermostat control system for a structure comprising:

a central control system configured to control a heating, ventilation, and air conditioning (HVAC) system of the structure; and

a plurality of remote wireless sensor nodes to be located in a plurality of areas within the structure, each remote wireless sensor node of the plurality of the remote wireless sensor nodes comprising;

a temperature sensor for measuring a temperature in an area of the plurality of areas within the structure in which the remote wireless sensor node is located;

an occupant sensor for sensing one or more persons in the area of the plurality of areas within the structure in which the remote wireless sensor node is located;

a wireless radio frequency (RF) communication module for bidirectional communication between the remote wireless sensor node and the central control system;

a controller in communication with the temperature sensor, the occupant sensor, and the wireless RF communication module, the controller being configured to transmit, via the wireless RF communication module, at least data received from the occupant sensor and the temperature sensor to the central control system; and

a power source for powering the controller, the temperature sensor, the occupant sensor, and the wireless RF communication module;

wherein;

the central control system comprises;

a wireless RF communication module for wirelessly communicating with the plurality of remote wireless sensor nodes; and

a controller configured to use a priority schedule to prioritize temperature control among the plurality of areas of the structure, and prioritization of temperature control among the plurality of areas using the priority schedule is determined by the controller of the central control system at least partially based on a time of day.

2. The multi-nodal thermostat system for the structure of claim 1, wherein the central control system comprises a thermostat that:

receives user input indicative of a desired temperature, controls the HVAC system based on the desired temperature, and wirelessly communicates with the plurality of remote wireless sensor nodes.

3. The multi-nodal thermostat system for the structure of claim 2, wherein the thermostat comprises a visual display that presents a current temperature and a setpoint temperature.

4. The multi-nodal thermostat system for the structure of claim 1, wherein the controller of the central control system is configured to control the HVAC system of the structure to bring one or more prioritized areas of the plurality of areas of the structure to a desired temperature based on the priority schedule.

5. The multi-nodal thermostat system for the structure of claim 1, wherein the controller of the central control system is configured to receive user input indicative of the priority schedule.

6. The multi-nodal thermostat system for the structure of claim 1, wherein the priority schedule used by the controller of the central control system to prioritize temperature control among the plurality of areas of the structure is based at least in part on occupancy sensing performed by the plurality of remote wireless sensor nodes.

7. The multi-nodal thermostat system for the structure of claim 1, wherein the priority schedule used to prioritize temperature control among the plurality of areas of the structure is determined by the controller of the central control system at least partially based on a time of day.

8. The multi-nodal thermostat system for the structure of claim 7, wherein the priority schedule used to prioritize temperature control among the plurality of areas of the structure is additionally determined by the controller of the central control system at least partially based on occupancy data received from the plurality of remote wireless sensor nodes.

9. The multi-nodal thermostat system for the structure of claim 1, wherein the central control system further comprises a display in communication with the controller of the central control system such that the controller can cause a current temperature at a remote wireless sensor node of the plurality of the remote wireless sensor nodes to be displayed by the display.

10. The multi-nodal thermostat system for the structure of claim 1, wherein the occupant sensor of each remote wireless sensor node of the plurality of the remote wireless sensor nodes is one of an infrared sensor, a motion sensor, or an ultrasonic sensor.

11. The multi-nodal thermostat system for the structure of claim 1, wherein the controller of the central control system combines a subset of multiple remote wireless sensor nodes of the plurality of the remote wireless sensor nodes such that a composite area is defined for the priority schedule to prioritize temperature control among the plurality of areas of the structure.

12. The multi-nodal thermostat system for the structure of claim 1, wherein the central control system is configured to receive a modification to the priority schedule via the Internet.

13. The multi-nodal thermostat system for the structure of claim 1, wherein each remote wireless sensor node of the plurality of the remote wireless sensor nodes enters a sleep state for a period of time between measurements by the temperature sensor and the occupant sensor, the sleep state requiring less power from the power source than a non-sleep state.

14. The multi-nodal thermostat system for the structure of claim 1, wherein the central system transmits a wake-up signal to each remote wireless sensor node of the plurality of the remote wireless sensor nodes via the wireless RF communication module of the central control system.

15. The multi-nodal thermostat system for the structure of claim 14, wherein each remote wireless sensor node of the plurality of the remote wireless sensor nodes in response to the wake-up signal, performs a measurement by the temperature sensor and transmits the measurement to the central control system.

16. The multi-nodal thermostat system for the structure of claim 1, wherein each remote wireless sensor node of the plurality of the remote wireless sensor nodes stores an identifier specific to the remote wireless sensor node and the identifier is included in each data packet transmitted by the wireless RF communication module of the remote wireless sensor node.

17. The multi-nodal thermostat system for the structure of claim 1, wherein the power source of each remote wireless sensor node of the plurality of the remote wireless sensor nodes comprises a battery and the remote wireless sensor node is configured to transmit a battery health message to the central control system via the wireless RF communication module.

18. The multi-nodal thermostat system for the structure of claim 1, wherein the wireless RF communication module of each remote wireless sensor node of the plurality of the remote wireless sensor nodes performs frequency hopping and communicates with the central control system on various frequency bands around 900 MHz.

19. The multi-nodal thermostat system for the structure of claim 1, wherein each remote wireless sensor node of the plurality of the remote wireless sensor nodes comprises an electronically-controlled register vent (ECRV) that can be actuated open or shut in response to a command from the central control system to adjust the temperature of the area of the structure corresponding to the remote wireless sensor node to reach a setpoint temperature indicated by a user.

20. The multi-nodal thermostat system for the structure of claim 1, wherein the controller of the central control system is configured to control the HVAC system of the structure to bring one or more prioritized areas of the structure to a desired temperature based on the priority schedule.