Exhaust Pipe Clogging Detection via Pressure Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional substrate processing apparatuses face challenges in detecting clogging in exhaust pipes, leading to inefficient cleaning processes and increased consumption of cleaning liquids, as the occurrence of clogging is not reliably identified.
Innovation Solution
The apparatus includes a clogging detection unit that utilizes pressure measurements from multiple points in the exhaust pipe to determine the location of clogging and a cleaning liquid supply system to target specific areas for cleaning, ensuring that cleaning is only performed when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic cleaning processing is performed to wash off products from the exhaust pipe, then the exhaust pipe can be maintained, but cleaning liquid is consumed unnecessarily when clogging has not occurred
Solution Approach 1:
The system uses pressure sensors to continuously monitor the exhaust pipe pressure and provides feedback to the control unit. When the pressure exceeds a predetermined threshold indicating clogging, the control unit triggers cleaning processing. This feedback mechanism ensures cleaning is performed only when necessary, reducing unnecessary cleaning liquid consumption while maintaining exhaust pipe functionality.
Solution Approach 2:
The system enables the exhaust pipe to self-diagnose its own clogging status through pressure monitoring. The control unit automatically determines when cleaning is needed based on pressure readings, and the cleaning liquid supply unit automatically supplies cleaning liquid to the exhaust pipe. This self-service approach eliminates the need for manual intervention and optimizes cleaning timing.
2Reliability
If cleaning processing is performed frequently to ensure exhaust pipe clarity, then clogging can be prevented, but processing time is lost and throughput is reduced
Solution Approach 1:
The pressure monitoring system provides real-time feedback on exhaust pipe conditions. Cleaning processing is triggered only when pressure exceeds the predetermined threshold, rather than performing frequent scheduled cleanings. This reduces unnecessary processing time loss and maintains higher throughput while still preventing clogging when it actually occurs.
Solution Approach 2:
The system performs preliminary detection of clogging conditions through pressure monitoring before actual clogging occurs. When pressure approaches the threshold, the system prepares for cleaning by triggering the cleaning liquid supply. This preliminary action allows cleaning to be performed at the optimal moment, preventing clogging without requiring frequent routine cleanings that would reduce productivity.
3Ease of operation
If no detection system is implemented and periodic cleaning is used, then the system is simple to operate, but clogging cannot be reliably detected and cleaning liquid is wasted
Solution Approach 1:
The pressure sensors and control unit automatically monitor and detect clogging conditions through pressure feedback. The control unit compares real-time pressure readings against predetermined thresholds to accurately determine when clogging has occurred. This automated detection system maintains ease of operation while providing precise clogging detection capability.
Solution Approach 2:
The system replaces manual inspection and judgment of clogging conditions with automated pressure sensing and electronic control. The pressure sensors objectively measure the clogging state, and the control unit automatically processes this information to trigger cleaning when needed. This substitution of mechanical/manual detection with sensor-based detection improves measurement precision while keeping the system easy to operate.
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 solution allows for the reliable detection of exhaust pipe clogging, reducing unnecessary cleaning and minimizing cleaning liquid consumption, thereby improving throughput and efficiency.
Implementation Method 1
a pressure measurement unit that measures an internal pressure of the chamber
Data Source
AI summary
Disclosed is a substrate processing apparatus including a chamber, a first measuring unit, an exhaust pipe, a regulation valve, an opening degree detection unit, a valve controller, and a clogging detection unit. The chamber accommodates therein a substrate to be processed by using a processing fluid. The first measuring unit measures an internal pressure of the chamber. An exhaust from the chamber flows through the exhaust pipe. The regulation valve regulates an exhaust volume of the exhaust pipe. The opening degree detection unit detects a valve opening degree of the regulation valve. The valve controller controls the valve opening degree of the regulation valve based on a measurement result of the first measuring unit to keep the internal pressure within a specified range. The clogging detection unit detects clogging of the exhaust pipe based on the valve opening degree detected by the opening degree detection unit.