Discharge Head Deflectable Wall for Variable Mixing Ratio
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Solution Overview
Problem
Existing discharge heads for mixing two liquids face challenges in adjusting the mixing ratio without causing undesired liquid escape when introducing the second medium after the dosing chamber is filled with the first medium.
Innovation Solution
A volume-compensating mechanism with a deflectable dosing-chamber wall portion that can move from a minimal to a maximal position, allowing the second medium to be introduced without causing liquid to flow out, by creating an auxiliary volume in the dosing chamber, which is achieved through a deflectable wall portion that can be arranged on either the base or the displacer, and a feed mechanism with a separate actuation handle for precise metering of the second medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the dosing chamber is filled with the first medium and then the second medium is introduced to adjust the mixing ratio, then the mixing ratio can be variable adjusted, but liquid already flowing out through the outlet causes undesired liquid escape
Solution Approach 1:
The dosing chamber volume is made dynamically adjustable by introducing a variable volume element that can change its volume during the dosing process. This allows the chamber to accommodate the second medium without causing liquid to escape through the outlet, while still enabling variable mixing ratio adjustment.
Solution Approach 2:
The volume of the dosing chamber is changed as a parameter during operation. By varying the volume of the variable volume element, the total dosing chamber volume is adjusted to accommodate the second medium, preventing liquid escape while maintaining the ability to adjust mixing ratios.
2Adaptability or versatility
If a fixed dosing chamber volume is used, then the structure is simple, but the mixing ratio cannot be variable adjusted by adding the second medium
Solution Approach 1:
A variable volume element is integrated into the dosing chamber to provide dynamic volume adjustment capability. This allows the chamber to adapt its volume when the second medium is introduced, enabling mixing ratio adjustment while maintaining a relatively simple overall structure.
Solution Approach 2:
The dosing chamber is segmented into a fixed volume portion and a variable volume element. This segmentation allows the variable portion to be adjusted independently to accommodate the second medium, enabling mixing ratio control without complicating the entire dosing chamber structure.
3Adaptability or versatility
If the second medium is added after the dosing chamber is filled with the first medium, then the mixing ratio can be adjusted, but the liquid volume increases causing discharge head issues
Solution Approach 1:
The dosing chamber volume is dynamically adjusted by incorporating a variable volume element that can expand to accommodate the second medium. This dynamic adjustment prevents excessive liquid volume accumulation and associated discharge head issues while maintaining mixing ratio control capability.
Solution Approach 2:
The volume parameter of the dosing chamber is changed during operation to accommodate the second medium. By adjusting the volume of the variable volume element, the total liquid volume is controlled, preventing discharge head issues while enabling mixing ratio adjustment.
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
Enables convenient production of a mixed liquid without liquid escape, allowing for variable adjustment of the mixing ratio, especially beneficial for media where one medium constitutes the main volume and the other is a smaller fraction, such as in skin creams, by ensuring the second medium can be added without displacing the first medium, thus preventing unwanted discharge.
Implementation Method 1
a deflectable dosing-chamber wall portion which delimits the dosing chamber and which is deflectable, with respect to the first end position of the displacer relative to the base, between a minimal position, in which it does not enlarge the volume of the dosing chamber, and a maximal position, in which it enlarges the volume of the dosing chamber to a maximum extent
Data Source
AI summary
A discharge head for mixing two media and discharging the mixed liquid, having a dosing chamber, a first inlet, a second inlet, and an outlet through which the mixed liquid is discharged from the dosing chamber. A displacer is movable in an actuation direction between first and second end positions to force the mixed liquid through the outlet. A volume-compensating mechanism has a wall portion which is deflectable between a minimal position in which the volume of the dosing chamber is not enlarged and a maximal position in which the volume of the dosing chamber is enlarged to a maximum extent. Deflection of the wall portion in the direction of the maximal position enables an auxiliary volume to be made available in the dosing chamber through which, with the dosing chamber already filled with the first media, the second media can be introduced into the dosing chamber.