Room Sensor Electrokinetic Airflow for Low-Profile Design
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Solution Overview
Problem
Existing wall sensors in building automation systems face a challenge in reducing their height while maintaining adequate airflow for media sensing, as they become less effective at drawing room air as they are made thinner, leading to stagnant air flow.
Innovation Solution
The integration of an electrokinetic transducer within the sensor assembly, which uses electrodes to charge and move airborne particles, creating a directed airflow through the sensor housing by ionizing particles near the anode and attracting them to the cathode, thereby enhancing air flow without relying solely on ambient currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the height of wall sensors is reduced to achieve a low-profile design, then the aesthetic appearance and safety are improved, but the air flow to the sensor becomes stagnant and insufficient for effective sensing
Solution Approach 1:
The patent replaces the mechanical/physical system of passive ambient air currents with an electrokinetic transducer that uses electrical fields to charge and move airborne particles, creating an active air flow mechanism that does not depend on external mechanical forces or sensor height
Solution Approach 2:
The patent changes the operational parameters by introducing an electrokinetic transducer that actively generates air flow through electrical charging of particles, transforming the sensor from a passive recipient of ambient air to an active system that creates its own air flow regardless of height constraints
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 solution allows for a low-profile sensor design that consistently draws fresh air for sensing, improving the effectiveness of media monitoring and control in building automation systems by maintaining a steady airflow through the sensor housing.
Implementation Method 1
uses electrodes to charge and move airborne particles in order to create an air flow
Implementation Method 2
ionizing particles near the anode and attracting them to the cathode
Data Source
AI summary
A sensor assembly has a housing with at least two ventilation openings, a sensing element, a passage within the housing, and an electrokinetic transducer. The passage extends between the at least two ventilation openings, and is in fluid communication with the sensing element. The electrokinetic transducer is configured to move air in a first direction with the passage.