Temperature Controller with Current Detection for Heater Reliability
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Solution Overview
Problem
Traditional temperature control methods in industrial heating, particularly in semiconductor processes, are inadequate due to reliance on single temperature detectors, leading to overheating risks, complex multi-controller setups, and high energy consumption, with current alarm devices offering limited functionality and increasing costs.
Innovation Solution
A temperature controller module incorporating a microprocessor, temperature and current detectors, a safety relay, and an optically coupled solid-state relay for simultaneous temperature and current measurement, enabling reliable control and remote monitoring, with the ability to switch between temperature settings and power modes efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single temperature detector is used for feedback control, then the device complexity is reduced, but the reliability of temperature control deteriorates due to potential detector or relay breakdown causing overheating
Solution Approach 1:
The patent combines temperature detection, current detection, microprocessor control, and alarm functions into a single integrated temperature controller module. This merging of multiple functions into one device reduces overall system complexity while maintaining high reliability through comprehensive monitoring and control capabilities.
Solution Approach 2:
The temperature controller is designed as a multi-functional device that simultaneously performs temperature detection, current detection, PWM control, alarm signaling, and remote communication. This universal design allows a single device to replace multiple separate components, improving reliability without increasing complexity.
2Temperature
If multiple temperature controllers are adopted for long heating pipelines, then the temperature control coverage is improved, but the device complexity and installation complexity increase
Solution Approach 1:
The temperature controller incorporates multiple communication protocols (RS485, Ethernet, EtherCAT) and supports both local and remote control modes. This multi-functional communication capability allows a single controller to manage multiple heating zones, reducing the need for multiple separate controllers while maintaining comprehensive temperature control coverage.
Solution Approach 2:
The patent adds communication and control dimensions to the traditional temperature controller by integrating remote communication interfaces and alarm output functions. This transforms the controller from a simple local temperature regulator into a networked control node that can coordinate multiple heating sections along long pipelines.
3Ease of manufacture
If traditional alarm devices are used, then the cost is reduced, but the functionality is limited and cannot provide comprehensive monitoring
Solution Approach 1:
The alarm function is merged into the temperature controller as an integrated feature rather than a separate device. The controller includes alarm relays and communication interfaces that provide comprehensive monitoring capabilities (temperature alarms, fault detection, remote alerts) within the same cost-effective unit, eliminating the need for additional standalone alarm devices.
4Ease of operation
If communication hardware is added to every temperature controller, then the remote control capability is improved, but the cost and volume of the controller increase
Solution Approach 1:
The controller integrates multiple communication protocols (RS485, Ethernet, EtherCAT) into a unified communication module that handles both local and remote operations. This multi-protocol capability allows the same hardware platform to support various communication needs without requiring separate communication hardware for each protocol, minimizing volume and cost increases while maximizing remote control versatility.
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 solution provides enhanced reliability and flexibility in temperature control, reduces energy consumption, and simplifies installation and communication, while extending the lifespan of mechanical relays through arc elimination, thus improving overall process safety and efficiency.
Implementation Method 1
an optically coupled solid-state relay and an optocoupler. The optically coupled solid-state relay includes a light-emitting diode and a power switch. The optocoupler includes a light-emitting diode and a phototriode
Implementation Method 2
A temperature detector is used as the only feedback signal (including thermocouple and thermal resistance, etc.) for traditional temperature control
Implementation Method 3
Heating is widely applied in the field of industry. Since heating requires massive energy
Data Source
AI summary
A temperature controller includes a microprocessor, a temperature detector, a current detector, a control relay and an external interface. Wherein, the temperature detector detects a working temperature of a heater; the current detector detects a current value passing through a heating element; and the microprocessor determines an operating state of the temperature controller (102) according to a temperature and a current value received from the temperature detector and the current detector, and sends a control signal to the control replay, thereby controlling the operation of the heater so as to adjust the temperature. By means of the temperature controller, current measurement is added while temperature measurement is performed, so that an operating state of a heater can be correctly determined, thereby greatly improving the reliability of the temperature controller.