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Prospective determination of processor wake-up conditions in energy buffered HVAC control unit having a preconditioning feature

  • US 9,910,577 B2
  • Filed: 01/14/2015
  • Issued: 03/06/2018
  • Est. Priority Date: 10/21/2011
  • Status: Active Grant
First Claim
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1. A preconditioning thermostat, comprising:

  • one or more processors in operative communication with a heating, ventilation, and air conditioning (HVAC) system, the one or more processors having a preconditioning function associated with a stored setpoint temperature, the one or more processors including a processor having a first operating state and a second operating state, wherein the one or more processors consume more power in the second operating state than in the first operating state, wherein the one or more processors are programmed to perform operations comprising;

    determining a set of wake-up conditions for the preconditioning function upon which said processor is to enter into said second operating state from said first operating state, said set of wake-up conditions including at least one threshold value associated with at least one environmental condition and/or at least one time-of-day;

    causing the set of wake-up conditions for the preconditioning function to be stored in a memory;

    operating in a first mode in which said processor is in said first operating state during a time interval subsequent to said causing the set of wake-up conditions for the preconditioning function to be stored in said memory;

    determining, while said processor is in said first operating state, whether at least one of the set of wake-up conditions for the preconditioning function has been met; and

    operating in a second mode in which said processor is in said second operating state upon a determination that the at least one of the set of wake-up conditions for the preconditioning function has been met, the one or more processors being configured to control the HVAC system according to the preconditioning function while operating in the second operating state.

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