Heat Treatment Discharge Pipe Insulation for Condensate Prevention
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Solution Overview
Problem
Conventional heat treatment apparatuses fail to prevent condensate from adhering to the interior of the exhaust pipe during cooling processes after heat treatment, as residual heat causes vaporized gases to condense and deposit inside the pipe.
Innovation Solution
A heat treatment apparatus with a discharge pipe covered by a heat insulating member to maintain the pipe's temperature and prevent condensation, combined with a cooling process that slows down the pipe's cooling to prevent condensate formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cooling process is applied to initiate subsequent heat treatment quickly, then productivity is improved, but condensate adheres to the interior of the exhaust pipe due to residual heat
Solution Approach 1:
A heat insulating member is introduced as an intermediary between the exhaust pipe and the surrounding cooling environment. This insulating layer mediates the thermal interaction, preventing the pipe wall temperature from dropping below the dew point during rapid cooling processes, thereby eliminating condensate adhesion while maintaining high productivity
2Loss of time
If the processing container is rapidly cooled down using air cooling, then the cooling time is reduced, but the exhaust pipe generates condensate due to residual heat
Solution Approach 1:
The heat insulating member acts as a thermal buffer during rapid cooling operations. It prevents excessive heat loss from the exhaust pipe to the surrounding air, maintaining the pipe temperature above the dew point even when the processing container is rapidly cooled, thus preventing condensate generation while minimizing cooling time
3Productivity
If the heat treatment apparatus is not fully cooled before the next heat treatment, then productivity improves, but condensate deposits form in the exhaust pipe
Solution Approach 1:
The heat insulating member provides continuous thermal protection to the exhaust pipe during transition periods between heat treatment cycles. This allows the apparatus to enter the next cycle without complete cooling while the insulating layer prevents the pipe temperature from dropping into the condensate formation range, ensuring both high throughput and reliable deposit prevention
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
Effectively suppresses condensate generation within the discharge pipe, maintaining throughput and preventing deposits from forming during cooling processes post-treatment.
Implementation Method 1
a heat insulating member configured to cover a circumference of the discharge pipe
Implementation Method 2
heating, by a heating unit, the processing container from a circumference of the processing container
Implementation Method 3
cooling down the space between the processing container and the heating unit
Data Source
AI summary
There is provided a heat treatment apparatus, including: a processing container configured to perform a heat treatment on substrates accommodated in the processing container; a heating unit configured to cover an outer circumference of the processing container with a predetermined space defined the heating unit and the processing container; a discharge pipe installed outside of the processing container and within the predetermined space, and configured to communicate with an interior of the processing container to discharge an exhaust gas from the interior of the processing container; and a heat insulating member configured to cover a circumference of the discharge pipe.