Invention Grant
- Patent Title: Power-preserving communications architecture with long-polling persistent cloud channel for wireless network-connected thermostat
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Application No.: US14720578Application Date: 2015-05-22
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Publication No.: US09851729B2Publication Date: 2017-12-26
- Inventor: Andrea Mucignat , Oliver Steele , Senthilvasan Supramaniam , Osborne Hardison , Richard J. Schultz , Daniel A. Warren , Hugo Fiennes , Jonathan A. Dutra , David Bell , Anthony M. Fadell , Matthew L. Rogers , Ian C. Smith , Grant M. Erickson , Edwin H. Satterthwaite , Joseph E. Palmer
- Applicant: Google Inc.
- Applicant Address: US CA Mountain View
- Assignee: Google Inc.
- Current Assignee: Google Inc.
- Current Assignee Address: US CA Mountain View
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: G05D23/19
- IPC: G05D23/19 ; G06F1/32 ; H04L12/28 ; H04L29/12 ; H04L29/08 ; G05B15/02 ; F24F11/00

Abstract:
Methods and systems facilitate network communications between a wireless network-connected thermostat and a cloud-based management server in a manner that promotes reduced power usage and extended service life of a energy-storage device of the thermostat, while at the same time accomplishing timely data transfer between the thermostat and the cloud-based management server for suitable and time-appropriate control of an HVAC system. The thermostat further comprises powering circuitry configured to: extract electrical power from one or more HVAC control wires in a manner that does not require a “common” wire; supply electrical power for thermostat operation; recharge the energy-storage device (if needed) using any surplus extracted power; and discharge the energy-storage device to assist in supplying electrical power for thermostat operation during intervals in which the extracted power alone is insufficient for thermostat operation.
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