Thermostat Cloud Communication Rate Control Under Low Battery Power
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Solution Overview
Problem
HVAC systems face challenges in maintaining reliable remote control and user experience due to power constraints in battery-powered controllers, leading to potential misinterpretation of communication failures and inefficient energy use.
Innovation Solution
Incorporating an energy storage device and a controller that adjusts communication rates based on available power, sending messages indicative of delays to prevent misinterpretation of power failures and conserve energy by reducing communication frequency as power dwindles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thermostat communicates frequently with the cloud-based server, then the user experience and system reliability are improved, but the battery power is depleted faster
Solution Approach 1:
The thermostat dynamically adjusts its communication rate with the cloud-based server based on available battery power. When power is充足, communication occurs at a higher rate to maintain system reliability and user experience. When power becomes limited, the system automatically reduces communication frequency to conserve energy, extending operational life while maintaining essential functionality.
Solution Approach 2:
The system changes the communication parameter (communication rate) based on the power state of the battery. By monitoring battery charge levels and power availability, the thermostat modifies its communication behavior - switching between active communication modes and low-power modes - to optimize the balance between system reliability and energy consumption.
2Duration of action of moving object
If the thermostat reduces communication frequency to conserve energy, then battery life is extended, but the server may misinterpret the lack of communication as a failure
Solution Approach 1:
Before reducing communication frequency due to low battery conditions, the thermostat sends a preliminary notification message to the cloud-based server indicating the upcoming communication pause and providing an estimated return time. This advance notice prevents the server from misinterpreting the reduced communication as a system failure or malfunction.
Solution Approach 2:
The system implements a feedback mechanism where the thermostat informs the server of its power state and communication schedule adjustments. The server receives feedback about the thermostat's operational status and adapts its expectations accordingly, preventing false failure interpretations while the thermostat operates in extended low-power mode.
Data Source
AI summary
A communication rate between a cloud-based server and an HVAC controller located within a building may be controlled based on the amount of power available at the HVAC controller. The cloud-based server may notify a user if the amount of power available at the HVAC controller is determined to be low.