An ota security upgrade method and system for a dual backup bootloader of an air conditioner controller

By introducing a dual-backup bootloader and a state management mechanism into the air conditioner controller, the reliability and environmental adaptability issues of OTA upgrades for home air conditioners have been resolved, enabling a safe, reliable, and low-cost OTA upgrade process and improving the user experience.

CN122195480APending Publication Date: 2026-06-12FOSHAN VANADIUM SOUND TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FOSHAN VANADIUM SOUND TECH CO LTD
Filing Date
2026-03-04
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing OTA upgrade solutions for air conditioner controllers are not reliable enough in home environments, are prone to system crashes due to power outages and voltage fluctuations, and are costly, failing to meet user experience requirements.

Method used

The OTA security upgrade method using a dual-backup bootloader sets up a first and a second partition in the non-volatile memory of the air conditioner controller as backups for each other. Combined with a minimized bootloader and state management, it achieves redundancy, fault tolerance, and environmentally adaptable upgrades, including block verification, environmental condition judgment, and the use of active area pointers.

Benefits of technology

Ensure the security and reliability of the upgrade process, reduce the need for human intervention, improve user experience, and achieve a safe, efficient, and user-friendly OTA upgrade process.

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Abstract

The application relates to the technical field of smart home, in particular to an OTA (Over-the-Air) safe upgrading method and system of a dual-backup Bootloader for an air conditioner controller. In a nonvolatile memory of the air conditioner controller, an independent Bootloader boot area is arranged, the Bootloader boot area comprises a first partition and a second partition, the first partition and the second partition are backups of each other and are used for storing executable application programs; the Bootloader boot area is provided with a minimized boot program, the boot program is used for reading an upgrading state stored in the nonvolatile memory when the air conditioner is powered on or reset, and an upgrading flow is started according to the decision of the upgrading state; wherein the upgrading state comprises an idle state, a first-partition-writing state and a second-partition-writing state, the flexible environment condition judgment allows the upgrading to be performed when the system is stable, the influence on the normal operation of the air conditioner is minimized, and therefore, a safe, efficient and user-friendly OTA upgrading flow is realized.
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