Method for detecting variable frequency air conditioner coolant leakage based on speed range parameters

A technology of refrigerant leakage and variable frequency air conditioning, which is applied in heating mode, space heating and ventilation, and control input involving air characteristics, etc. The effect of improving the accuracy of
CN106545957AActive Publication Date: 2017-03-29佛山国防科技工业技术成果产业化应用推广中心
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
佛山国防科技工业技术成果产业化应用推广中心
Publication Date
2017-03-29

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Abstract

The invention discloses a method for detecting variable frequency air conditioner coolant leakage based on speed range parameters; the method comprises the steps of determining whether a detection program uses a refrigerating or heating mode according to indoor and outdoor ambient temperatures; measuring electrical parameters and temperature parameter of an air conditioner system within a preset speed range, and measuring compressor voltage and current parameters, indoor and outdoor ambient temperatures, and indoor and outdoor heat exchanger temperatures when a compressor runs stably at each frequency node; acquiring a compressor power curve within the preset speed range; acquiring an indoor heat exchanger temperature change curve within the preset speed range; judging whether the compressor runs normally or not; if yes, judging effectiveness of the measured temperature change curve; judging whether coolant leaks or not. By measuring, within a preset speed range, the indoor heat exchanger temperature parameter of an air conditioner system and judging whether coolant leaks or not according to temperature change law, detection accuracy is greatly improved.
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Description

technical field

[0001] The invention relates to the field of application of permanent magnet synchronous motors and the field of frequency conversion air conditioners, in particular to a method for detecting refrigerant leakage of frequency conversion air conditioners based on speed interval parameters. Background technique

[0002] The air conditioner has been widely used due to its cooling / heating function. During the use of the air conditioner, refrigerant leakage may occur, thereby affecting the cooling / heating effect of the air conditioner. A large part of commonly used air conditioners do not have refrigerant leakage detection and alarm display functions, so when refrigerant leakage affects the cooling / heating effect, users cannot judge the fault.

[0003] Few air conditioners have refrigerant leakage detection function: patent 201410623887.X discloses a detection method and system for air-conditioning refrigerant leakage: by detecting the refrigerant mass flow in the ...

Claims

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