Elastic Liquid Discharge Device Pressure Control
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Solution Overview
Problem
Conventional liquid discharge devices face challenges in rapidly filling discharge holes with liquids containing solid matter or high viscosity, leading to slow discharge rates and potential leakage due to pressure applied to increase filling speed, which affects accuracy and stability.
Innovation Solution
A liquid discharge device with an elastic discharge part, actuating unit, pressurizing unit, supply control unit, and actuation control unit, which pressurizes the liquid within a stable range to rapidly fill the storage chamber and discharge hole, controlling the discharge timing to ensure accurate and high-speed discharge without leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pressure is applied to the liquid to increase the filling speed, then the discharge rate is improved, but liquid leakage occurs from the discharge hole
Solution Approach 1:
The patent applies parameter changes by controlling the pressure parameter within a specific stable range (5-30 kPa) rather than using high pressure. This pressure parameter optimization enables rapid filling while preventing liquid leakage, resolving the contradiction between discharge rate and reliability.
2Quantity of substance
If the volumetric capacity of the discharge hole is increased to discharge larger volume of liquid, then the quantity of liquid discharged is improved, but the filling time increases
Solution Approach 1:
The patent changes the pressure parameter to an optimized range (5-30 kPa) that enables rapid filling of larger volumetric capacities. This parameter optimization allows the discharge hole to be filled quickly even with increased volume, resolving the contradiction between quantity discharged and filling time.
3Reliability
If surface tension is used to fill the discharge hole, then liquid leakage is prevented, but the filling speed is slow
Solution Approach 1:
The patent optimizes the pressure parameter to a stable range (5-30 kPa) that overcomes the limitation of surface tension-based filling. This parameter change enables rapid filling while maintaining reliable liquid leakage prevention, resolving the contradiction between speed and reliability.
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 accurate and high-speed discharge of various liquids, including those with high viscosity, by maintaining a stable pressure range and controlling the supply and actuation of the liquid, ensuring consistent droplet volume and preventing leakage.
Implementation Method 1
a pressurizing unit that pressurizes the liquid to be supplied to the storage chamber to a pressure within a stable range
Implementation Method 2
an elastic discharge part that includes a storage chamber at least partially formed of an elastic component
Implementation Method 3
the discharge hole is filled with the liquid by surface tension
Data Source
AI summary
A liquid discharge device including a discharge unit including: an elastic discharge part including a storage chamber at least partially formed of an elastic component, a supply hole which leads to the storage chamber and through which liquid is supplied to the storage chamber, and a discharge hole through which the liquid is discharged; and an actuating unit configured to vary a volumetric capacity of the storage chamber. The liquid discharge device further includes: a pressurizing unit configured to pressurize the liquid to be supplied to the storage chamber to a pressure within a stable range; a supply control unit configured to control whether the pressurized liquid is supplied to the storage chamber; and an actuation control unit configured to control operation of the actuating unit.