A kind of air conditioner fluorine deficiency protection method, device and air conditioner

An air conditioner, fluorine-deficient technology, applied in heating methods, space heating and ventilation, lighting and heating equipment, etc., can solve problems such as aggravated compressor wear, performance degradation of air conditioning systems, damage to compressors, etc., to avoid damage to compressors. machine, avoid the effect of system performance degradation
CN104482630BActive Publication Date: 2017-09-22GREE ELECTRIC APPLIANCES INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GREE ELECTRIC APPLIANCES INC
Publication Date
2017-09-22

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Abstract

The invention discloses air conditioner fluorine deficiency protection method and an air conditioner fluorine deficiency protection device as well as an air conditioner. The air conditioner fluorine deficiency protection method comprises the following steps: when preset conditions are satisfied, detecting the current real-time refrigerant mass flow rate qm of an air conditioner system, obtaining normal mass flow rate Q corresponding to the current operation condition by inquiring a pre-established mapping relation table of normal mass flow and operation conditions; then, comparing the qm with the normal mass flow rate Q to detect whether refrigerant leaks or not; calculating the mass flow rate variation ratio eta of the refrigerant based on the qm and the Q, detecting the leakage degree of the refrigerant according to the numerical magnitude of the eta, and timely giving a shutdown protection order to perform shutdown protection on the air conditioner when the eta is greater than a preset threshold value and the refrigerant leaks much to reach preset protection limit. The air conditioner fluorine deficiency protection method can be used for effectively detecting a refrigerant leakage condition and timely performing shutdown protection when the refrigerant leaks much, so that the phenomena such as system performance reduction and damage to a compressor are avoided.
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Description

technical field

[0001] The invention belongs to the technical field of air conditioner detection and control, and in particular relates to an air conditioner fluorine deficiency protection method and device and an air conditioner. Background technique

[0002] Air conditioners often have slow leakage of refrigerant in their systems due to various reasons. For example, when the air conditioner is installed, the connection between the connecting pipe and the connecting pipe of the internal and external units is poorly sealed, or the connecting pipe is bent and leaks when it passes through the wall. Both will lead to slow leakage of refrigerant; in addition, if the system pipeline is in a harsh environment, the pipeline is prone to leakage after long-term corrosion, so that the amount of refrigerant in the system gradually decreases.

[0003] Slow refrigerant leaks are more subtle and difficult to detect. However, if the leakage phenomenon is not detected in time and correspon...

Claims

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