Liquid Droplet Jetting Apparatus Suction Cooling
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Solution Overview
Problem
In liquid droplet jetting apparatuses, heat generated during high-speed recording destabilizes jetting operations and fine liquid droplets (mist) contaminate the interior, leading to instability and contamination issues.
Innovation Solution
A liquid droplet jetting apparatus with a suction port near the nozzle that uses a suction device to cool the heat generating section with sucked air, effectively removing floating fine liquid droplets and reducing contamination by guiding them to a waste liquid tank, thereby maintaining stable operation and preventing interior contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed recording is performed with a large number of nozzles, then productivity is improved, but heat generation increases causing jetting operation instability
Solution Approach 1:
The patent introduces a suction device that creates a negative pressure environment around the nozzle to remove heat-generating circuit elements and cool the heat generating section. This pneumatic approach allows high-speed recording with multiple nozzles while maintaining jetting stability through active cooling and heat removal.
Solution Approach 2:
The patent uses a heat generating section that is physically separated from the jetting head unit by introducing a suction port and negative pressure field as an intermediary zone. This separation allows the heat generating components to be removed from the immediate nozzle environment, preventing heat-induced jetting instability while maintaining high productivity.
2Productivity
If liquid is jetted from the nozzle at high frequency, then productivity is improved, but fine liquid droplets are generated causing contamination
Solution Approach 1:
The suction device creates a negative pressure field that actively removes fine liquid droplets (mist) from the environment around the nozzle. This pneumatic suction system continuously evacuates contaminated air and liquid particles, preventing interior contamination while allowing high-frequency jetting operations.
Solution Approach 2:
The patent extracts and removes the harmful fine liquid droplets from the working environment using the suction device. By continuously evacuating the air around the nozzle, the system separates and removes the contaminating mist from the jetting process, allowing high-speed recording without interior contamination.
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
The solution effectively cools the heat generating section, stabilizes jetting operations, and prevents contamination by continuously removing fine liquid droplets, enhancing the heat releasing effect and reducing the risk of electrical faults due to mist adherence.
Implementation Method 1
a suction device which sucks air around the nozzle from the suction port to cool the heat generating section of the jetting head unit by the sucked air
Implementation Method 2
it is possible to suck fine liquid droplets, which are jetted from the nozzle and which float without landing on an object subjected to jetting, together with the air around the nozzle
Data Source
AI summary
A liquid droplet jetting apparatus includes a jetting head unit which has a nozzle which jets droplets of a liquid, and a heat generating section, a suction port which is formed in the jetting head unit, and which opens near the nozzle, and a suction device which sucks air around the nozzle from the suction port, and cools down the heat generating section of the jetting head unit by the air which is sucked. Since the heat generating portion is cooled down by the air sucked from the suction port by the suction device, it is possible to reduce a possibility of the heat of the heat generating section being transferred to the jetting head unit, and destabilizing an operation of the jetting head unit. Moreover, since the suction port opens near the nozzle, it is possible to suck fine liquid droplets together with air around the nozzle.