Vertical Heat Treatment Apparatus Pressure Control
Solution Overview
Problem
Existing vertical heat treatment apparatuses face challenges in maintaining the space between the furnace body and the treatment container at a slightly negative pressure with high precision during rapid cooling, leading to potential breakage of the furnace body or non-uniform temperature distribution.
Innovation Solution
A vertical heat treatment apparatus equipped with a pressure detection system and a control section that adjusts air supply and exhaust lines to maintain a slightly negative pressure in the range of 0 Pa to −85 Pa, using a blower and valve mechanisms to control airflow, ensuring precise pressure management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rapid cooling is performed in the vertical heat treatment apparatus, then cooling speed is improved, but pressure control precision deteriorates
Solution Approach 1:
The patent employs a feedback control system where a pressure detection system continuously monitors the pressure in the space between the furnace body and treatment container, and a control section adjusts the air supply and exhaust rates based on detected pressure to maintain slightly negative pressure during rapid cooling. This feedback mechanism enables both high cooling speed and precise pressure control.
Solution Approach 2:
The patent dynamically adjusts the air supply rate and air exhaust rate during the cooling process based on real-time pressure conditions. The control section modifies operational parameters adaptively to maintain optimal pressure levels throughout the rapid cooling process, transitioning from static to dynamic control.
2Stability of the object's composition
If the space pressure is maintained at slightly negative pressure, then temperature distribution uniformity is improved, but device complexity increases
Solution Approach 1:
The feedback control system continuously monitors pressure and adjusts air supply/exhaust to maintain slightly negative pressure, preventing external air entry and ensuring uniform temperature distribution. This automated feedback mechanism achieves temperature uniformity without requiring complex manual intervention.
Solution Approach 2:
The system maintains slightly negative pressure automatically through the control section that responds to pressure detection signals, making the pressure control self-regulating. This self-service capability ensures temperature uniformity while minimizing the need for additional complex control devices.
3Measurement precision
If pressure detection system is added to the vertical heat treatment apparatus, then pressure control precision is improved, but device complexity increases
Solution Approach 1:
The pressure detection system provides real-time pressure information to the control section, which automatically adjusts air supply and exhaust rates. This feedback loop achieves precise pressure control with minimal additional complexity, as the system self-regulates based on detected pressure conditions.
Solution Approach 2:
The patent replaces complex mechanical pressure control mechanisms with an automated control system that uses pressure detection and electronic control to regulate air flow. This substitution achieves higher precision while managing complexity through intelligent control rather than mechanical complexity.
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 precise control of pressure in the space between the furnace body and the treatment container, preventing hot air from escaping and external air from entering, thus maintaining a stable and uniform temperature distribution during cooling.
Implementation Method 1
supplying cooling air to the space between the furnace body and the treatment container through a plurality of air outlets
Implementation Method 2
a pressure detection system for detecting the pressure in the space between the furnace body and the treatment container
Implementation Method 3
a control section for controlling, based on a detection signal from the pressure detection system, at least one of the blower, the air supply line valve mechanism and the air exhaust line valve mechanism to keep the space at a slightly negative pressure
Data Source
AI summary
A vertical heat treatment apparatus including a furnace body having a heating section in the inner circumferential surface; a treatment container for housing a plurality of objects W to be treated. An air supply line is connected to the furnace body, and an air exhaust line is connected to the furnace body. An air supply blower and an air supply line valve mechanism, and an air exhaust blower and an air exhaust line valve mechanism are provided in the air supply line and the air exhaust line, respectively. A pressure detection system is provided for detecting the pressure in the space. A control section controls, based on a detection signal from the pressure detection system the blowers, the air supply line valve mechanism and the air exhaust line valve mechanism to keep the space at a slightly negative pressure.