Superheated Steam Generator Induction Heating Control
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Solution Overview
Problem
Conventional superheated steam generators rely heavily on setting PID constants for accurate temperature control, which limits their response speed and accuracy.
Innovation Solution
A superheated steam generator with a heating metal body in contact with steam and an induction coil that uses 50 Hz or 60 Hz AC power to heat the metal body, maintaining a thickness of 10 mm or less between the induction coil and steam contact surface, allowing for precise temperature control without relying solely on PID constants, utilizing nonmagnetic metals like SUS 316L for deep current penetration and high corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional PID control is used for temperature control, then temperature accuracy can be maintained, but response speed is limited
Solution Approach 1:
The patent changes the physical parameters of the heating system by using induction heating with specific frequency (50/60 Hz AC power) and optimizing the thickness of the heating metal body (10 mm or less). This transforms the heating mechanism from conventional methods to induction heating, achieving both high response speed and temperature accuracy without relying solely on PID control parameter tuning
Solution Approach 2:
The patent replaces conventional thermal control mechanisms with induction heating technology. By using electromagnetic induction to heat the metal body directly, the system achieves rapid response and precise temperature control, substituting mechanical/thermal adjustment methods with electromagnetic field-based heating
2Strength
If the heating metal body thickness is increased, then structural strength is improved, but temperature control accuracy and response speed deteriorate
Solution Approach 1:
The patent optimizes the thickness parameter of the heating metal body to 10 mm or less. This parameter optimization ensures that the metal body is thin enough to allow rapid heat transmission from the induction coil to the steam contact surface, achieving high temperature control accuracy and response speed while maintaining sufficient structural strength through material selection and design
3Force
If magnetic materials are used for the heating metal body, then magnetic coupling with the induction coil is improved, but current penetration depth decreases
Solution Approach 1:
The patent employs nonmagnetic metals or alloys as the heating metal body material. This material selection eliminates magnetic coupling issues and achieves deep current penetration throughout the metal body thickness, ensuring uniform heating and high temperature control accuracy. The material composition is specifically chosen to be nonmagnetic while maintaining structural strength and thermal conductivity
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
Enables highly accurate and rapid temperature control of superheated steam, with a temperature deviation of less than ±1°C, by adjusting PID constants based on target temperature and steam generation amount, ensuring efficient energy distribution and high controllability.
Implementation Method 1
an induction coil that inductively heats the heating metal body
Implementation Method 2
apply induction current to a conductive tube serving as a secondary coil wound on the iron core, and thereby heats saturated steam flowing through the conductive tube
Implementation Method 3
a temperature difference between the steam contact surface serving as a steam heating surface of the heating metal body and the induction coil side surface serving as a temperature contact surface of the heating metal body can be reduced
Data Source
AI summary
The present invention intends to highly accurately control a temperature of superheated steam at a high response speed, and provides a superheated steam generator that inductively heats a heating metal body in contact with steam using an induction coil, and thereby heats the steam in contact with the heating metal body to generate superheated steam. In addition, a frequency of an AC power supply connected to the induction coil is 50 Hz or 60 Hz, and a thickness between an induction coil side surface of the heating metal body facing toward the induction coil and a steam contact surface of the heating metal body in contact with the steam is 10 mm or less.