Foam Dispenser Reversible Valve Air Piston
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Solution Overview
Problem
Existing foam-dispensing pumps face challenges in achieving a reliable and cost-effective mixture of air and liquid, with issues related to air and liquid metering accuracy and valve structure reliability, particularly in maintaining the quality of foam by controlling bubble size and mixture ratio.
Innovation Solution
The design incorporates an air valve structure with an annular sleeve component and annular valve element, which controls air delivery and make-up air introduction, integrated with a reciprocating air and liquid piston system within a housing, allowing for precise air-flow management and easy fabrication/installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex valve structure is used to control air and liquid metering accurately, then the reliability of foam dispensing is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The patent combines the air valve and liquid valve into a single integrated valve assembly where a single piston controls both air and liquid flow. This merging of functions reduces the number of separate components while maintaining reliable metering control for both fluids, directly addressing the contradiction between reliability and complexity.
Solution Approach 2:
The single piston mechanism serves multiple functions: it controls air intake through the air valve, controls liquid delivery through the liquid valve, and coordinates the timing of both flows. This multi-functionality reduces overall device complexity while ensuring reliable operation of the foam dispensing system.
2Manufacturing precision
If precise air and liquid metering is implemented to control foam quality, then the foam quality is improved, but the manufacturing cost increases
Solution Approach 1:
The piston-driven valve system automatically meters air and liquid in the correct proportions through its mechanical design. The piston's reciprocating motion inherently controls the timing and quantity of air and liquid delivery without requiring external control systems, achieving precise metering while simplifying manufacturing.
Solution Approach 2:
The patent uses the piston's position and motion parameters to control the metering of air and liquid. By changing the piston's displacement and speed, the system achieves variable metering ratios, allowing precise control of foam quality through simple mechanical parameter adjustments rather than complex control mechanisms.
3Measurement precision
If multiple separate valves are used for air and liquid control, then the metering accuracy is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the air valve and liquid valve into a single integrated assembly controlled by one piston. This combination maintains the precision of separate valve control while reducing the total number of components, directly resolving the contradiction between metering precision and device complexity.
Solution Approach 2:
The air valve and liquid valve are nested within the same housing and controlled by the same piston mechanism. This nesting arrangement allows both valves to occupy the same spatial envelope and be coordinated by a single actuator, reducing overall complexity while maintaining precise control of both air and liquid flows.
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
This configuration ensures reliable and accurate air-flow management, improving the quality of foam production by controlling bubble size and mixture ratio, while being cost-effective and easy to manufacture.
Implementation Method 1
The upward travel of the air piston creates a vacuum within the air chamber and this negative pressure needs to be relieved by the introduction of make-up air. The disclosed air valve is constructed and arranged to allow the introduction of make-up air into the air chamber.
Data Source
AI summary
A foam-dispensing pump includes an actuator, a collar, a housing, an air piston, a liquid piston, a mesh element and an air valve structure. The collar is constructed and arranged for attachment to a liquid storage container and a portion of the actuator is received by the collar. The air piston is constructed and arranged to be moveable within the housing. The liquid piston is constructed and arranged to be moveable within the housing. The mesh element is constructed and arranged to receive air and liquid for the production of foam. The air valve structure includes an annular sleeve component which is assembled onto the liquid piston and a cooperating annular valve element which is received by the air piston.