Heat Exchanger Flame Arrestor for Carrier Vapor Combustion Control
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Solution Overview
Problem
Existing carrier fluid evacuation systems in LEP printing devices face challenges in efficiently evaporating carrier fluid while avoiding combustion, leading to undesirable operating costs and system footprint when scaled to multiple photoconductive elements and ITM belts.
Innovation Solution
A heat exchange and flame arrest (HEFA) device with tubing and cooling fins that traverse a core, utilizing gaps between fins to lower gas temperature below autoignition and condense carrier fluid vapor, integrated with a cooling fluid pathway to manage gas flow and prevent combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier fluid is evaporated efficiently in LEP printing devices, then productivity is improved, but the risk of combustion increases
Solution Approach 1:
The patent introduces a flame arrestor as an intermediary device in the carrier fluid evacuation system. This flame arrestor acts as a mediator between the hot carrier fluid vapor and the surrounding environment, allowing the vapor to be evacuated efficiently while preventing combustion by blocking flame propagation through the use of narrow passages that quench flame fronts.
Solution Approach 2:
The patent converts the harmful hot carrier fluid vapor that could cause combustion into a beneficial evaporated state for printing operations. By using the heated ITM to evaporate the carrier fluid and then safely evacuating it through the flame arrestor, the system transforms a potential hazard into a necessary functional step for efficient printing.
2Productivity
If evacuation system is scaled to multiple photoconductive elements and ITM belts, then productivity is improved, but system footprint and operating costs increase
Solution Approach 1:
The patent designs a universal flame arrestor and evacuation system that can be scaled and replicated for multiple photoconductive elements and ITM belts. The modular design allows the same flame arrestor technology to be applied across different configurations, enabling the system to handle multiple printing elements without proportionally increasing footprint or complexity.
3Productivity
If evacuation system is scaled to multiple photoconductive elements and ITM belts, then productivity is improved, but operating costs increase
Solution Approach 1:
The patent implements a self-service evacuation system where the flame arrestor and cooling mechanisms are designed to operate autonomously with the existing carrier fluid evacuation flow. The system uses the kinetic energy and temperature differential of the evaporated carrier fluid itself to drive the cooling and condensation processes, minimizing additional energy input requirements even when scaled to multiple printing elements.
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 HEFA device ensures safe and efficient operation by preventing combustion and condensing carrier fluid vapor, minimizing system damage, reducing footprint, and optimizing costs while maintaining operator safety and cleanliness.
Implementation Method 1
The tubing defines a cooling fluid pathway and the cooling capacity of the cooling fluid pathway is sufficient to lower temperature of the subject gas to below an autoignition temperature
Implementation Method 2
The combination of the gap between each cooling fin of the set and the cooling capacity of the cooling fluid pathway is sufficient to lower temperature of the subject gas to below an autoignition temperature
Data Source
AI summary
In an example of the disclosure, a heat exchange and flame arrest device for use with a subject gas includes tubing arranged to traverse a core, with the tubing defining a cooling fluid pathway. The core includes a gas flow inlet, a set of cooling fins, and a gas flow outlet. The gas flow inlet, the set of cooling fins, and the gas flow outlet collectively form a gas flow pathway for a subject gas. Each cooling fin of the set is positioned to form a gap between that cooling fin and an adjacent cooling fin. The gas flow inlet is to receive the subject gas. The combination of the gap between each cooling fin of the set and the cooling capacity of the cooling fluid pathway is sufficient to, if the subject gas has ignited, lower temperature of the subject gas to below autoignition temperature.