Fluid Dispenser Head Variable Suction Chamber Nozzle Blockage
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Solution Overview
Problem
Conventional fluid dispenser nozzles with micro-holes and filters often become blocked due to fluid drying or increased viscosity, leading to spraying deterioration or cessation, as solid residues form and clog the spray wall and filters.
Innovation Solution
Incorporating a variable suction chamber that decreases in volume when pressure is applied and increases when relaxed, creating suction to remove fluid from the nozzle and filters, preventing blockages by ensuring the nozzle is empty after spraying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a nozzle with micro-holes and filters is used, then spray uniformity is improved, but the nozzle becomes blocked due to fluid drying and residue formation
Solution Approach 1:
The suction chamber performs a preliminary emptying action after spraying to remove residual fluid before it can dry and form blockages. This preliminary cleanup action prevents the harmful effect of residue accumulation in the micro-holes and filters.
Solution Approach 2:
The suction chamber discards residual fluid from the nozzle and filter by returning it to the container. This discarding of unwanted fluid prevents blockage while maintaining the beneficial micro-hole spray structure.
2Reliability
If the nozzle is emptied after spraying, then blockage is prevented, but additional mechanical complexity is introduced
Solution Approach 1:
The suction chamber is merged with the existing pump chamber, combining two functions (pumping and suction) into a single chamber. This reduces overall device complexity while achieving blockage prevention.
Solution Approach 2:
The suction chamber uses the existing pump mechanism to create negative pressure and automatically draw back fluid without requiring separate actuators or complex control systems. The system serves itself using existing components.
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
Prevents nozzle blockage and clogging by ensuring the nozzle is emptied of fluid, thereby avoiding solid residue formation and viscosity issues, ensuring consistent spraying performance.
Implementation Method 1
the suction chamber generates suction or 'sniffing' that makes it possible to remove the fluid from the spray wall and/or from the filter(s) by returning the fluid into the suction chamber
Implementation Method 2
the volume of the suction chamber decreases when pressure is exerted on the bearing surface and increases when the pressure on the bearing surface is relaxed
Data Source
AI summary
A fluid dispenser head for mounting on a dispenser member, such as a pump, and including a bearing surface for actuating the dispenser member, and a spray wall that is perforated with a network of holes through which the fluid under pressure passes so as to be sprayed in small droplets, the dispenser head being characterized in that it further includes a suction chamber of volume that is variable, such that the volume of the suction chamber decreases when pressure is exerted on the bearing surface and increases when the pressure on the bearing surface is relaxed.