Movable Internal Part Switches Liquid Discharge Modes
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Solution Overview
Problem
Existing liquid dispensers lack the ability to conveniently and efficiently vary the discharge characteristic between atomized spray jets and non-atomized liquid streams or droplets, limiting user control and versatility.
Innovation Solution
The discharge head of the liquid dispenser features a movable internal part within the outlet channel, creating two distinct liquid paths with adjustable flow resistance, allowing for selective discharge as a spray jet or continuous stream/droplets, facilitated by a geometric design including a swirl chamber and bypass duct, which can be controlled through translational or rotational movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single outlet channel is used for liquid discharge, then the device structure is simple, but the discharge characteristic cannot be varied between spray jet and continuous stream
Solution Approach 1:
The internal part is made movable relative to the outlet channel, allowing dynamic switching between two discharge modes. The internal part can be positioned to either block the bypass duct (for spray jet discharge) or open the bypass duct ( for continuous stream discharge), enabling adaptability without requiring multiple fixed outlet channels
Solution Approach 2:
The outlet channel is segmented into two distinct liquid paths: a spray duct for atomized spray jet discharge and a bypass duct for continuous stream discharge. This segmentation allows the system to provide different discharge characteristics through a single outlet channel structure, resolving the contradiction between structural simplicity and discharge variability
2Productivity
If the spray duct is used for atomized spray jet discharge, then the discharge efficiency is high, but the flow resistance is higher compared to bypass duct
Solution Approach 1:
The spray duct is designed with specific local geometric features (swirl chamber, spray opening geometry) that create high flow resistance to achieve atomization, while the bypass duct has a different local geometry that provides low flow resistance for continuous stream discharge. This local quality differentiation allows the system to optimize for either discharge efficiency or low resistance depending on the operational mode selected
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 design enables intuitive and versatile liquid discharge, allowing users to easily switch between spray jets and continuous streams/droplets, ensuring efficient and uninterrupted dispensing, with the ability to manage flow resistance and kinetic energy, enhancing user convenience and operational flexibility.
Implementation Method 1
The spray duct is formed by a suitable geometric shape for producing a spray jet, for example by the provision of a swirl chamber upstream of the spray opening
Implementation Method 2
a pump device which may be actuated by a relative translatory movement of the discharge head relative to the base unit and which conveys liquid out of the liquid reservoir into the discharge head
Implementation Method 3
the liquid reservoir in the second cited construction may be alternatively configured as a pressure accumulator, wherein in such a case the liquid dispenser also has an outlet valve which may be actuated by a relative translatory movement of the discharge head relative to the base unit
Data Source
AI summary
A discharge head for discharging liquid as an atomized spray jet and as a non-atomized liquid stream or as individual droplets. The discharge head fastening fastens to a base unit and has a liquid outlet through which liquid is discharged from a reservoir into the atmosphere, and a liquid inlet through which liquid is conducted out of the reservoir to the liquid outlet. An internal part is arranged inside an outlet channel, and a spray opening is provided on the internal part. The internal part and the outlet channel are relatively displaceable so that in a first position a bypass duct is produced between an internal wall of the outlet channel and an outer face of the internal part, the flow resistance thereof being lower than the spray duct, and in a second position is partially closed wherein the flow resistance of the bypass duct is greater than the spray duct.