Industrial Heater Forced Air Recirculation Cylinder Deformation
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Solution Overview
Problem
Conventional electric heaters for industrial processing machines suffer from temperature differences between the upper and lower parts of the cylinder, leading to deformation and premature wear of the rotating screw due to thermal dilation, which cannot be effectively managed or controlled.
Innovation Solution
An electric heater with a forced air recirculation system using fan means at the bottom of the lower half-shell to distribute temperature evenly by circulating air from above to below, reducing the temperature gap and preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional air cooling is used with air entering from the lower part and exiting from the upper part, then the temperature control is achieved, but the temperature difference between upper and lower parts of the cylinder increases causing deformation
Solution Approach 1:
The patent inverts the conventional air cooling flow direction. Instead of air entering from the lower part and exiting from the upper part, the fan means are arranged at the bottom to generate forced air recirculation that enters from above and exits downward. This reversal of the air flow direction equalizes the temperature distribution, preventing thermal dilation on the upper part and eliminating cylinder deformation.
2Temperature
If the cylinder is heated unevenly with thermal dilation on the upper part, then the temperature processing function is maintained, but the rotating screw undergoes premature wear due to chafing/rubbing
Solution Approach 1:
The patent implements a feedback mechanism through forced air recirculation. The fan means create a continuous circulation system where air is constantly moved from above to below the cylinder, providing real-time thermal regulation. This feedback loop prevents localized overheating and thermal dilation, maintaining uniform temperature that protects the rotating screw from chafing and premature wear during processing.
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 forced air recirculation system effectively maintains consistent temperature across the cylinder, preventing deformation and extending the life of the rotating screw by minimizing thermal conductivity issues.
Implementation Method 1
Each heating element is preferably made of a helical element which is contained in a quartz tube, which, when the resistances are heated, becomes incandescent and emits radiation in the infrared field.
Implementation Method 2
fan means arranged at the bottom of said lower half-shell and adapted to generate a forced air recirculation system which allows said forced air to enter said chamber from above and then to exit downward
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
An electric heater (1) for industrial processing machines, which comprises an upper half-shell (2) and a lower half-shell (3) which are hinged to each other and are adapted to define a receiving chamber (4), heating means (6) being accommodated within the receiving chamber (4), fan means (8) being arranged at the bottom of the lower half-shell (3) and being adapted to generate a forced air recirculation system which allows the forced air to enter the chamber (4) from above and then to exit downward.