Gas Chamber Volume Modulation for Fanless Gas Measurement
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Solution Overview
Problem
Existing gas measurement devices require fans to suck gas, resulting in complex configurations.
Innovation Solution
A gas measurement device with a gas chamber defined by a movable member, controlled by a driving unit, which varies the chamber's volume to draw in or exhaust gas without a fan, using a filter and a gas sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fan is used to suck gas into the measurement chamber, then gas intake is achieved, but the device complexity increases
Solution Approach 1:
The patent removes the fan component from the gas measurement device entirely. Instead of using a fan to force gas into the measurement chamber, the invention extracts only the essential function of gas intake by utilizing pressure differential created by volume change of the chamber itself, thereby eliminating the complex fan mechanism while maintaining gas intake capability.
Solution Approach 2:
The measurement chamber performs self-service by using its own volume expansion and contraction to create the pressure differential needed for gas intake and exhaust. The chamber itself becomes the pumping mechanism through its elastic deformation, eliminating the need for external gas-moving components like fans.
2Device complexity
If the gas chamber volume is changed by moving defining members, then gas flow is achieved without a fan, but the mechanism complexity increases
Solution Approach 1:
The patent utilizes the elastic phase transition or deformation of the chamber wall material. The elastic member reversibly changes its shape between expanded and contracted states, creating the necessary volume changes for gas flow without requiring complex mechanical mechanisms. This phase-like transition of the elastic material enables simple yet effective gas pumping action.
3Volume of moving object
If a movable member is used to vary chamber volume, then gas suction capability is improved, but the device size increases
Solution Approach 1:
The patent introduces a movable member that dynamically changes the volume of the measurement chamber. This dynamic adjustment allows the chamber to expand and contract, creating pressure differentials that drive gas flow. The movable member enables the chamber to adapt its volume actively, improving gas suction capability while maintaining a compact overall device structure through controlled motion rather than static expansion.
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
Enables gas measurement with a simpler structure and stable gas flow, while potentially downsizing the device and improving response speed.
Implementation Method 1
When at least the part of the member defining the gas chamber moves such that the volume of the gas chamber increases, the pressure in the gas chamber decreases from outside the gas chamber. External gas is drawn into the gas chamber through a filter that controls gas molecules. When at least the part of the member defining the gas chamber moves such that the volume of the gas chamber decreases, the pressure in the gas chamber increases from outside the gas chamber.
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3(A)~3(B)
AI summary
The gas measurement device includes a gas sensor disposed in a gas chamber, a filter configured to control passing gas molecules to the gas chamber, and a driving unit configured to move at least a part of a member defining the gas chamber.