Portable Inflation Device Venturi Chamber Orifice Design
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Solution Overview
Problem
Existing portable avalanche airbag devices often fail to achieve complete inflation due to insufficient thrust force, especially when the user is positioned unfavorably during an avalanche, leading to partial inflation under stress from the user's weight or snow.
Innovation Solution
A portable device with a venturi-based system that includes a surrounding air inlet, non-return valve, compressed gas inlet, and an intermediate chamber connected to an acceleration cone, featuring a transverse wall with strategically positioned orifices to enhance the venturi effect and increase inflation power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a conventional venturi system is used for airbag inflation, then the device can be operated portably, but the inflation thrust is insufficient under heavy stress conditions
Solution Approach 1:
The air intake system is divided into multiple independent intake chambers (first, second, third intake chambers) with separate compression chambers associated with each. This segmentation allows each chamber-compression pair to work independently, collectively generating sufficient inflation thrust while maintaining portable device constraints.
Solution Approach 2:
The compression chambers are positioned within or adjacent to the intake chambers, creating a nested or integrated structure. The first compression chamber is associated with the first intake chamber, the second compression chamber with the second intake chamber, and so on, allowing compact arrangement that increases power without proportionally increasing overall device volume.
2Force
If the user is positioned unfavorably during avalanche, then partial inflation occurs, but the device cannot generate enough force to overcome user weight and snow pressure
Solution Approach 1:
By dividing the inflation system into multiple independent chamber-compression units, the device can generate cumulative inflation force that reliably overcomes varying stress conditions including user weight and snow pressure, ensuring complete inflation regardless of user position.
Solution Approach 2:
The system changes the parameter of inflation force by incorporating multiple compression chambers that collectively generate sufficient pressure to ensure complete airbag inflation even under heavy stress conditions, transforming the insufficient force of a single chamber into adequate force through multiplication of compression units.
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 device achieves significant inflation power, ensuring complete inflation of the airbag even under greater stress conditions, such as the weight of the user or avalanche snow, by optimizing the venturi effect through the design of the intermediate chamber and orifice configuration.
Implementation Method 1
An airbag-type envelope is generally inflated by the aspiration of surrounding air, by a joint supply of compressed gas, commonly accelerated by venturi effect
Implementation Method 2
at least one non-return valve
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a portable device for inflating an envelope comprising at least one inlet (1) for surrounding air, at least one check valve, at least one compressed-gas inlet (2), at least one intake chamber (3), at least one connector, such as an acceleration cone (5) having a longitudinal central axis of symmetry (X, X'), arranged in the extension of at least one intake chamber (3) and connected to at least one inflatable envelope, an intermediate chamber connecting at least one compressed gas inlet (2) to at least one intake chamber (3), while one intermediate chamber and at least one intake chamber (3) are separated by a wall arranged transverse to the axis (X, X') and are connected by at least one orifice located in the transverse wall (8).