Compact Particle Detecting Module Using Planar Gas Flow Path
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Solution Overview
Problem
Conventional particle detecting modules are bulky and difficult to miniaturize due to complex and thick gas-guiding paths, making them unsuitable for portable or mobile devices, which limits their ability to monitor suspended particle concentrations in varying environmental conditions.
Innovation Solution
A particle detecting module design featuring a base with a gas-inlet groove, a gas-guiding-component loading region, and a gas-outlet groove, where a piezoelectric actuator and laser component are separated, and a driving circuit board covers the base, reducing the module's thickness and volume, allowing for a compact form factor with defined inlet and outlet paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional gas-guiding channel structure is used with multi-layer design, then the gas flow path is established, but the thickness and volume of the particle detecting module increase
Solution Approach 1:
The patent transitions from a conventional multi-layer vertical gas flow path to a planar horizontal flow path integrated on a single substrate. The gas inlet groove, guiding component loading region, and outlet groove are arranged in the same plane, eliminating the need for multiple stacked layers and significantly reducing module thickness.
Solution Approach 2:
The patent integrates the gas flow channel, laser component mounting area, and particle detection region into a single unified substrate structure. The driving circuit board is attached directly to the substrate, merging multiple functional layers into one compact unit, thereby reducing overall module volume.
2Volume of moving object
If the piezoelectric actuator and laser component are positioned close together, then the module size is reduced, but the components interfere with each other's operation
Solution Approach 1:
The substrate is divided into distinct functional regions: a gas inlet groove region, a guiding component loading region for the piezoelectric actuator, and a separate laser component loading region. These segmented zones are spatially separated to prevent operational interference while maintaining overall compactness through planar integration.
Solution Approach 2:
Different regions of the substrate are optimized for specific functions with appropriate local structures. The guiding component loading region includes ventilation holes and specific groove configurations for actuator operation, while the laser region has dedicated mounting areas and optical paths, ensuring each component operates in its optimized local environment.
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
The module achieves a significant reduction in thickness and volume, enabling it to be integrated into miniaturized portable electronic devices, facilitating the detection of suspended particle concentrations in a compact and efficient manner, while maintaining effective gas flow and detection accuracy.
Implementation Method 1
a light beam path emitted from the laser component passes through the transparent window and extends in a direction perpendicular to the gas-inlet groove
Implementation Method 2
suspended particles passing through the gas-inlet groove and irradiated by a projecting light beam emitted from the laser component are detected
Implementation Method 3
The piezoelectric actuator is accommodated in the gas-guiding-component loading region
Data Source
AI summary
A particle detecting module is provided and includes a base, a piezoelectric actuator, a driving circuit board, a laser component, a particulate sensor and an outer cover. A gas-guiding-component loading region and a laser loading region are separated by the base. By the design of the gas flowing path, the driving circuit board covering the bottom surface of the base, and the outer cover covering the surfaces of the base, an inlet path is defined by the gas inlet groove of the base, and an outlet path is defined by a gas outlet groove of the base. Consequently, the thickness of the particle detecting module is drastically reduced.