Multi-Substance Dispenser Pumping for Precise Mixing Ratio
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Solution Overview
Problem
Existing dispensers for liquid or pasty substances struggle to maintain a precise mixing ratio due to viscosity variations in the substances, leading to undesirable effects such as color variations in hair dyes.
Innovation Solution
The integration of constant amount pumps between the dispensing openings and the dispensing head ensures an exact volume flow, independent of viscosity variations, by using mechanical or magnetic coupling of pumps to maintain the predetermined mixing ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If manual pressure or pressurized fluid is used to dispense substances, then the substances can be dispensed through the dispensing head, but the predetermined mixing ratio cannot be maintained precisely due to viscosity variations
Solution Approach 1:
A constant amount pump is introduced as an intermediary device between the dispensing openings and the dispensing head. This pump mediates the substance flow by mechanically enforcing a predetermined volume flow rate that is independent of the substances' viscosity variations, thereby maintaining the precise mixing ratio despite changes in material properties
Solution Approach 2:
The system changes the controlling parameter from pressure-based dispensing to volume-based dispensing. By using a constant amount pump that delivers a fixed volume per unit time regardless of viscosity, the mixing ratio is controlled by volumetric parameters rather than pressure parameters, eliminating the sensitivity to viscosity variations
2Manufacturing precision
If constant amount pumps are used to maintain exact volume flow, then the mixing ratio is maintained precisely, but the device complexity increases
Solution Approach 1:
The constant amount pump function is extracted as a separate, dedicated component between the dispensing openings and the dispensing head. This extraction allows the pump to be optimized specifically for maintaining constant volume flow while the rest of the dispensing system can remain relatively simple
Solution Approach 2:
The constant amount pump serves multiple functions simultaneously: it controls the volume flow rate, maintains the predetermined mixing ratio, compensates for viscosity variations, and ensures consistent dispensing. This multi-functionality justifies the added complexity by consolidating several control requirements into a single device
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 solution ensures that the dispensing of substances is independent of viscosity variations, providing consistent results and preventing issues like undesirable color effects in hair dyes.
Implementation Method 1
by using mechanical or magnetic coupling of pumps to maintain the predetermined mixing ratio
Data Source
AI summary
In a dispenser for dispensing at least two liquid or pasty substances from receptacles to a dispenser head, constant delivery pumps are connected therebetween to compensate for viscosity variations and keep a given mixing ratio constant.