Pneumatic Massage Module With Valve-Free Sequential Bladder Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pneumatic massage systems for vehicular seating require complex electro-mechanical valves to control the inflation and deflation of multiple bladders, leading to high production and development costs, making them unsuitable for lower-cost vehicles.
Innovation Solution
A pneumatic module with a fluidic switching module that uses cascading vented fluidic amplifiers and passive airflow control through air splitters and feedback passages to cyclically inflate and deflate bladders in a predefined sequence without mechanical or electrical valves, reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electro-mechanical valves are used to control bladder inflation and deflation, then precise control of massage sequence is achieved, but device complexity and production cost increase
Solution Approach 1:
The patent replaces electro-mechanical valves with a purely pneumatic fluidic logic system. Air splitters use airflow dynamics and pressure differentials to control the sequential inflation and deflation of bladders, eliminating mechanical moving parts and electrical components while maintaining precise control over the massage sequence.
Solution Approach 2:
The invention employs pneumatic principles throughout, using compressed air as the control medium. Fluidic amplifiers and air splitters utilize pressure gradients and airflow patterns to activate and deactivate bladders in a predetermined sequence, replacing traditional electro-mechanical control systems with an all-pneumatic approach.
2Ease of operation
If electro-mechanical valves are used to control multiple bladders, then sequential massage effect is achieved, but production cost increases
Solution Approach 1:
The patent employs inexpensive fluidic components such as air splitters and feedback passages that can be manufactured using simple molding techniques. These pneumatic logic elements replace costly electro-mechanical valves, significantly reducing production costs while maintaining the ability to deliver sequential massage effects through multiple bladders.
Solution Approach 2:
The fluidic logic system is self-regulating, using the airflow and pressure dynamics inherent in the system to automatically control the sequence of bladder activation. The air splitters and feedback passages create automatic switching mechanisms that require no external control systems, reducing both manufacturing complexity and production costs.
3Reliability
If complex valve systems are used for pneumatic massage, then reliable bladder control is achieved, but system simplicity is reduced
Solution Approach 1:
The patent extracts the control function from complex electro-mechanical valve systems and implements it through simplified pneumatic logic elements. Air splitters and feedback passages are designed to inherently direct airflow based on pressure differentials, providing reliable bladder control through passive pneumatic mechanisms rather than active electro-mechanical switching.
Solution Approach 2:
The invention introduces air splitters as intermediary components that mediate between the air source and the bladders. These fluidic elements use airflow dynamics to automatically switch between different bladder pathways, providing reliable control while maintaining system simplicity through passive pneumatic intermediaries rather than complex valve assemblies.
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 provides a reliable, cost-efficient, and sequential massage effect by eliminating the need for electronics and moving components, enabling a defined inflation/deflation sequence of bladders, thus reducing production costs and simplifying the system.
Implementation Method 1
The air splitter is configured to create two unequal air pressure fields to deflect an airflow from the air inlet to the second subsystem
Implementation Method 2
The second subsystem is configured to create two unequal air pressure fields to deflect the airflow toward the first air bladder to inflate the first air bladder
Implementation Method 3
when the first air bladder reaches a first threshold air pressure, a first backpressure from the first air bladder causes the second subsystem to switch and deflect the air flow to the second air bladder
Implementation Method 4
a second backpressure from the second air bladder is generated in the first feedback passage, and the second backpressure causes the air splitter to switch and deflect the airflow from the second subsystem to the third subsystem
Data Source
AI summary
A pneumatic system includes a fluidic switching module, an air connection inlet configured for connection to a source of pressurized air, a plurality of air connection outlets each in fluid communication with the air connection inlet, a first cascading subsystem downstream from and in fluid communication with the air connection inlet and configured to receive a pressurized airflow from the air connection inlet, a second cascading subsystem downstream from and in fluid communication with the first cascading subsystem, and a third cascading subsystem downstream from and in fluid communication with the first cascading subsystem. The fluidic switching module is configured to cyclically and sequentially direct the pressurized airflow between the plurality of air connection outlets without any moving parts or external controls.