Air-Cooling Heat Pump Leak Detection Using Refrigerant Indicators
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Solution Overview
Problem
Current refrigerant leak detection methods in heat pump systems are time-consuming and costly, often requiring specialized equipment and failing to provide timely detection, which can lead to reduced system efficiency, environmental pollution, and unnecessary refrigerant waste.
Innovation Solution
A method and system for detecting refrigerant leaks in air-cooling heat pump systems by obtaining a set of leak indication parameters, such as refrigerant level, compressor speed, and superheat degrees, and comparing them with preset intervals to determine the occurrence of a leak, with an optional alarm function to alert operators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If specialized equipment is used for refrigerant leak detection, then measurement precision is improved, but device complexity and loss of time increase
Solution Approach 1:
The heat pump system performs self-diagnosis by using its existing sensors and control system to monitor refrigerant levels and detect leaks. The controller compares detected refrigerant quantity against expected values and automatically identifies potential leaks without requiring external specialized equipment, thereby simplifying the detection system while maintaining accuracy.
Solution Approach 2:
The existing control system and sensors in the heat pump are made multi-functional by enabling them to perform both normal operation control and refrigerant leak detection. This eliminates the need for separate specialized detection equipment by making the universal control system capable of handling both functions.
2Measurement precision
If specialized equipment is used for refrigerant leak detection, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The refrigerant leak detection operates continuously during heat pump operation by constantly monitoring refrigerant quantity through existing sensors. This continuous monitoring eliminates the need for periodic manual inspections with specialized equipment, providing timely leak detection without interrupting system operation or requiring additional time for separate detection procedures.
Solution Approach 2:
The system performs continuous self-monitoring of refrigerant levels using its own control system, eliminating the need for external inspection procedures. This continuous self-diagnosis provides immediate leak detection without the time loss associated with scheduling and performing manual inspections with specialized equipment.
3Productivity
If refrigerant leak is not detected timely, then system efficiency is maintained, but loss of substance increases
Solution Approach 1:
The control system continuously monitors refrigerant quantity and provides feedback to the controller, which compares actual levels against expected values. When a discrepancy indicating a leak is detected, the system can immediately alert operators or automatically adjust operations, providing timely feedback that prevents significant refrigerant loss while maintaining system efficiency.
Solution Approach 2:
The system performs preliminary detection of refrigerant leaks during normal operation before significant refrigerant loss occurs. By continuously monitoring and comparing refrigerant quantities against expected values, the system can identify leaks early and alert operators to take corrective action, preventing substantial refrigerant loss and maintaining system efficiency.
Data Source
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AI summary
The present application provides an air-cooling heat pump system and a refrigerant leak detecting method and system therefore. The refrigerant leak detecting method for an air-cooling heat pump system in a heating mode comprises S110, S210, obtaining a leak indication parameter set, wherein the leak indication parameter set at least includes a refrigerant level in a liquid reservoir and/or a supercooling degree; S120, S220, comparing each leak indication parameter in the leak indication parameter set with a corresponding preset indication parameter interval; S130, S230, when each leak indication parameter falls within a corresponding preset indication parameter interval, obtaining and recording a corresponding evaluated refrigerant leak amount; S140, S240, when a cumulative value of the evaluated refrigerant leak amount falls within a preset refrigerant leak interval, determining that a refrigerant leak occurs in the air-cooling heat pump system; when the cumulative value of the evaluated refrigerant leak amount does not fall within the preset refrigerant leak interval, returning to the step S110, S210. According to the refrigerant leak detecting method of the present application, it is possible to accurately and reliably determine whether or not the refrigerant of the system to be detected leaks and the leak degree.