Integrated Air Sampling Pump Head for Low Pulsation Flow
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Solution Overview
Problem
Existing personal air sampling pumps suffer from flow pulsations that can cause vibration of collection filters and affect the performance of size-selective inlet devices, and they often require multiple components and assembly steps, increasing complexity and cost.
Innovation Solution
A rotary diaphragm air pump design integrating piston head diaphragms, airflow flow pulsation dampers, and sealing gaskets within a single compact housing, using a layered construction to reduce pulsations and simplify assembly, while maintaining optimal flow performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional personal air sampling pumps use separate components for diaphragms, dampers, and gaskets, then assembly flexibility is maintained, but device complexity and assembly time increase
Solution Approach 1:
The patent combines multiple separate components (piston head diaphragms, airflow pulsation dampers, sealing gaskets) into a single integrated pump head assembly. This merging reduces the total number of components and simplifies assembly procedures while maintaining the functional performance of each individual component.
Solution Approach 2:
The integrated pump head assembly serves multiple functions simultaneously: it provides pumping action through diaphragms, dampens airflow pulsations, and provides sealing functions through gaskets. This multi-functionality in a single assembly reduces complexity and assembly time.
2Loss of time
If rotary diaphragm air pump integrates multiple components into single housing, then assembly time is reduced, but manufacturing precision requirements increase
Solution Approach 1:
While integrating components into a single housing, the patent maintains functional segmentation through separate piston heads that can be independently assembled and tested before final integration. This approach balances integration benefits with manufacturing feasibility.
Solution Approach 2:
The patent optimizes design parameters such as diaphragm thickness, chamber volumes, and connector dimensions to achieve the desired integration precision. By carefully selecting and adjusting these parameters, the design accommodates normal manufacturing tolerances while maintaining functional performance.
3Stability of the object's composition
If pump design uses layered construction to reduce pulsations, then airflow stability is improved, but device complexity increases
Solution Approach 1:
The patent introduces a temporal dimension to airflow stability by using layered construction that dampens pulsations across different time scales. The layered design creates multiple flow paths with different resistance characteristics, smoothing out pulsations over time without requiring complex active control systems.
Data Source
AI summary
An air sampling pump includes a reciprocating piston for operating a diaphragm assembly. The diaphragm includes a valve head including a fluid inlet and a fluid outlet and a fluid chamber defining a fluid path between the inlet and outlet. A diaphragm sealing engages the valve head and encloses the fluid chamber. The diaphragm includes a piston diaphragm membrane portion coupled to the piston for reciprocating with the piston and reciprocation of the piston causes a change in air pressure within the fluid chamber to cause air to move from the fluid inlet toward the fluid outlet. The diaphragm includes a damper membrane portion, which cooperate to reduce an amplitude of pulsation in the airflow at the fluid inlet and fluid outlet.