Gas Sensor and Micro Pump Layout for Compact Mobile Detection
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Solution Overview
Problem
Conventional gas detection modules in mobile terminals require a large pump chamber volume to ensure detection accuracy, leading to a bulky design that contradicts the miniaturization requirements of modern mobile devices.
Innovation Solution
The integration of a gas sensor and micro pump on a fixed seat with independent fluid ports and a flow channel, allowing for compact structure and efficient gas exchange without increasing the pump chamber size, and the use of a gas-permeable filtering element to prevent liquid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pump chamber volume is designed to be relatively large to ensure detection accuracy, then the gas in the detection chamber can be fully discharged, but the volume of the entire gas detection module increases
Solution Approach 1:
The gas inlet and gas outlet are separated into two independent ports (first fluid port and second fluid port) on the fixed seat, allowing independent control of gas intake and exhaust pathways. This segmentation enables the pump chamber to have reduced volume while still achieving complete gas discharge, as the separate ports optimize flow efficiency without requiring a larger chamber.
Solution Approach 2:
The patent transitions from a single-port shared inlet/outlet design to a multi-port configuration on the fixed seat. By adding spatial dimensions for separate fluid ports and flow channels, the system achieves improved gas exchange efficiency with a smaller pump chamber volume, effectively using dimensional expansion to resolve the volume-accuracy contradiction.
2Device complexity
If the gas inlet and gas outlet share one port, then the structure is simpler, but the gas in the detection chamber cannot be fully discharged
Solution Approach 1:
The single shared port is segmented into two independent ports (first fluid port for gas inlet, second fluid port for gas outlet) on the fixed seat. This segmentation resolves the contradiction by providing separate pathways that ensure complete gas discharge while maintaining relatively simple overall structure through integrated design on the fixed seat.
Solution Approach 2:
The fixed seat acts as an intermediary component that hosts both the gas sensor and micro pump, and provides the separate fluid ports and flow channels. This intermediary structure enables the transition from shared port to separate ports without significantly increasing overall device complexity, as the fixed seat integrates multiple functions.
3Productivity
If separate fluid ports and flow channels are added to enable independent gas inlet and outlet, then gas discharge efficiency improves, but the device complexity increases
Solution Approach 1:
The fixed seat merges multiple functions: it serves as the mounting base for both the gas sensor and micro pump, and simultaneously provides the separate fluid ports and flow channels for gas exchange. This merging approach improves gas discharge efficiency while minimizing the increase in device complexity by consolidating multiple components into a single integrated structure.
Solution Approach 2:
The fixed seat is designed as a multi-functional component that performs both structural support and fluid management functions. By making the fixed seat universal (hosting multiple components and providing multiple functions), the patent achieves improved gas exchange efficiency without proportionally increasing overall device complexity, as the same component serves multiple purposes.
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 solution achieves a compact gas detection module with maintained detection accuracy, improved efficiency, and reduced mounting complexity, while minimizing the impact of liquid interference on gas sensing.
Implementation Method 1
When a piezoelectric film 05 of a micro pump 04 is loaded with a first electrical signal, the piezoelectric film 05 moves in a direction P1 of FIG. 1, and a volume of a pump chamber 06 increases to form a negative pressure
Data Source
AI summary
A gas detection module includes: a fixed seat, a gas sensor including a detection chamber, and a micro pump. The micro pump includes a pump chamber, a first communication port, and a second communication port. The first and second communication ports are in communication with the pump chamber. The gas sensor and the micro pump are arranged side by side on the fixed seat, the fixed seat is provided with a first and a second fluid port that are both in communication with the outside of the fixed seat, the first fluid port is in communication with the detection chamber, the second fluid port is in communication with the second communication port, a flow channel is further formed on the fixed seat. One end of the flow channel is in communication with the first fluid port, and the other end is in communication with the first communication port.