Airflow-Powered Smart Vent for Wireless HVAC Sensor Energy Harvesting
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Solution Overview
Problem
Existing smart home security and automation systems face challenges in efficiently powering smart home actuators and sensors, as they often rely on direct power sources, battery power, or solar power, which can be inconvenient and unreliable, particularly in areas without direct sunlight.
Innovation Solution
The system generates power from airflow in centralized heating and cooling systems using airflow-powered smart vents, monitoring airflow rates to produce power, store it in sensors, and adjust vent angles or thermostat settings to maintain sufficient power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If battery power is used to power smart home sensors and actuators, then the devices can operate wirelessly, but frequent battery monitoring and replacement is troublesome
Solution Approach 1:
The smart vent system generates its own power through airflow-driven mechanisms, eliminating the need for external battery replacement. The system serves itself by converting kinetic energy from HVAC airflow into electrical energy to power its sensors and actuators, making it self-sufficient and maintenance-free regarding power supply.
Solution Approach 2:
The patent replaces the chemical energy storage system (batteries) with a kinetic-to-electrical energy conversion system. An airflow sensor detects airflow rate, and this information drives a generator or piezoelectric element that converts mechanical airflow energy into electrical energy, substituting the battery-based power supply with a regenerative power system.
2Ease of operation
If solar power is used to power smart home sensors, then wireless operation is achieved, but the sensors require access to direct sunlight to function properly
Solution Approach 1:
The smart vent system is designed to operate in various locations within the home regardless of sunlight availability. By using airflow from the HVAC system as the power source instead of solar energy, the system becomes universal and can be installed in any room with HVAC airflow, eliminating the restriction of requiring direct sunlight for operation.
Solution Approach 2:
The patent substitutes solar-based photovoltaic power generation with airflow-based kinetic energy conversion. This replacement allows the system to draw power from the HVAC airflow that is consistently available throughout the home, rather than relying on intermittent solar exposure, thereby expanding the operational environment and location flexibility.
3Reliability
If direct power source is used for smart home actuators, then reliable power supply is achieved, but wiring for power is required
Solution Approach 1:
The patent replaces wired electrical power delivery with wireless regenerative power generation. The system uses the kinetic energy from HVAC airflow to drive a generator or piezoelectric material that produces electricity on-site, eliminating the need for physical wiring while maintaining reliable power supply through continuous airflow-driven energy generation.
Solution Approach 2:
The smart vent system generates its own power locally through airflow-driven mechanisms, making it self-sufficient without requiring connection to external power infrastructure. The system harvests energy from the HVAC airflow that already passes through the vent, converting it into electrical energy to power its components wirelessly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides a reliable and wireless power solution for smart home sensors and actuators, eliminating the need for frequent battery replacements and direct sunlight, while optimizing energy use based on occupancy and schedule.
Implementation Method 1
generating, at a sensor at the air vent, power based at least in part on the rate of airflow through the air vent
Data Source
AI summary
Techniques are described for generating power from airflow powered smart vents associated with security and automation systems. One method includes monitoring a rate of airflow through an air vent in a centralized heating and cooling system, generating, at a sensor at the air vent, power based at least in part on the rate of airflow through the air vent, storing the generated power in the sensor at the air vent, providing the stored power to one or more motors associated with the sensor at the air vent, and utilizing the stored power to perform communication between the sensor at the air vent and a control panel of the home automation system, wherein the control panel is located at a location different from a location of the sensor.