Piezoelectric Liquid Discharging Apparatus Viscosity Control
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Solution Overview
Problem
Existing liquid discharging apparatuses face challenges in stably discharging highly viscous liquids while minimizing power consumption, particularly in systems with multiple driving elements for a single nozzle.
Innovation Solution
The apparatus incorporates a discharging section with a first and second piezoelectric element, driven by a driving signal output circuit and a constant-voltage output circuit. A path switching circuit controls the flow of signals to the piezoelectric elements, allowing for two operational modes: one for high driving force and another for reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple driving elements are used for a single nozzle to stably discharge highly viscous liquid, then discharge stability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic switching between different driving modes (single driving element mode and multiple driving elements mode) based on liquid viscosity conditions. The control circuit selectively activates one or both piezoelectric elements in response to detected viscosity, enabling the system to adapt its driving configuration dynamically rather than operating continuously at maximum capacity, thus resolving the contradiction between discharge stability and power consumption
Solution Approach 2:
The system changes the operating parameters by switching between different driving configurations (single element vs. dual elements) depending on the liquid viscosity parameter. The control circuit monitors viscosity and adjusts the driving parameter configuration accordingly, allowing optimal power consumption while maintaining discharge stability across varying liquid conditions
2Reliability
If multiple driving elements are used for a single nozzle to ensure stable discharge, then discharge reliability is improved, but device complexity increases
Solution Approach 1:
The control circuit is designed with multi-functionality to handle both single driving element activation and multiple driving elements activation through a unified control architecture. This universal approach allows the same control circuit to manage different driving configurations without requiring separate control mechanisms, thereby maintaining discharge reliability while limiting the increase in device complexity
Solution Approach 2:
The control circuit is pre-programmed with viscosity threshold values and corresponding driving element activation patterns. When viscosity detection occurs, the circuit immediately references pre-established control logic to determine the appropriate driving configuration, eliminating the need for complex real-time calculations and reducing overall control complexity while ensuring reliable discharge
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 configuration enables stable discharge of highly viscous liquids while reducing power consumption, by adjusting the driving force based on the viscosity of the liquid through the use of different operational modes.
Implementation Method 1
a discharging section including a first piezoelectric element and a second piezoelectric element, the discharging section discharging a liquid when at least one of the first piezoelectric element and the second piezoelectric element is driven
Data Source
AI summary
A liquid discharging apparatus has: a discharging section that discharges a liquid when at least one of a first piezoelectric element and a second piezoelectric element is driven; In a first mode in which the driving signal is output from the second output portion, the switch control circuit controls the first switch so as not to create a continuity and controls the second switch so as to create a continuity. In a second mode in which the constant-voltage signal is output from the second output portion, the switch control circuit controls the first switch so as to create a continuity and controls the second switch so as not to create a continuity.