Temperature Control Diagnostics for Fast Fault Isolation
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Solution Overview
Problem
Temperature control devices in industries like injection molding face downtime and high costs due to faults, especially in areas where service technicians are not immediately available, necessitating a method to maintain equipment availability without stockpiling replacement devices.
Innovation Solution
A diagnostic method for temperature control devices that uses first and second sensors to identify and localize faults, decouples the device from the system, and runs a diagnostic program to check components and sensors in a predetermined order, allowing for quick fault detection and correction, even in the absence of specialized knowledge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If replacement devices are kept available to eliminate downtime, then equipment availability is improved, but additional financial expenditure is required
Solution Approach 1:
The diagnostic method performs preliminary fault detection and localization before the equipment fails completely. By continuously monitoring temperature, pressure, and flow parameters and comparing them against reference values, the system identifies deviations early, allowing maintenance to be scheduled at a convenient time rather than waiting for complete failure, thus eliminating the need for immediate replacement devices.
Solution Approach 2:
The temperature control device performs self-diagnostics using its own sensors and control unit. The device monitors its own operational parameters, compares them to reference values stored in memory, and autonomously identifies faults without requiring external service personnel or replacement equipment, thereby maintaining availability without additional financial cost.
2Ease of repair
If service technicians are deployed to areas where they are not immediately available, then fault resolution is improved, but response time increases
Solution Approach 1:
The device autonomously performs diagnostic functions using its control unit and sensors. The control unit evaluates operational parameters, compares them to reference values, and identifies faults without requiring external service technicians. This self-service capability eliminates the time loss associated with waiting for technician deployment while maintaining the ability to resolve faults.
Solution Approach 2:
The system continuously monitors operational parameters through sensors and provides immediate feedback to the control unit. When deviations from reference values are detected, the system generates diagnostic information that can be used to identify and address faults promptly, eliminating the need to wait for external service personnel to assess the situation.
3Measurement precision
If multiple sensors are added to monitor device state and environmental conditions, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The existing sensors in the temperature control device are utilized for multiple purposes. Temperature sensors monitor both the controlled temperature and can detect overheating conditions; pressure sensors monitor operational pressure and can detect blockages. This multi-functional use of existing sensors improves measurement precision without adding device complexity.
Solution Approach 2:
The device uses its existing sensor infrastructure to perform self-diagnostics. The control unit evaluates data from the existing temperature, pressure, and flow sensors against reference values to identify faults, eliminating the need for additional dedicated diagnostic sensors and maintaining device simplicity while improving detection accuracy.
Data Source
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Figure 2
Figure 3(a)~3(b)
AI summary
The invention relates to a diagnostic method (100) for temperature control devices (10) for temperature control of systems (20) for the purpose of identifying and/or locating faults in a temperature control device, which is equipped with one or more first sensors (1) and one or more further components (3) provided to ensure the operation of the system (20) with the temperature control device (10), and with one or more second sensors (2) provided to measure the condition of the temperature control device (10) and/or the ambient conditions around the temperature control device (10), comprising the following steps: - Determining (110) the temperature control device (10) to be checked with a diagnostic run; - Disconnecting (120) the temperature control device (10) from the system (20); - Connecting (130) the temperature control device (10) to a defined consumer (30);and - Execution (140) of the diagnostic run for the temperature control device (10) by means of a diagnostic program (5), wherein the diagnostic program (5) checks the components (3) and the first and second sensors (1, 2) of the temperature control device (10) in a predetermined sequence stored in the diagnostic program (5) until the fault in the temperature control device (10) is identified and/or located.;