Method and device for detecting air-conditioning refrigerant leakage

Abstract

The present invention provides a detection method and device for air conditioner refrigerant leakage. The detection device includes an outdoor unit and an indoor unit. The compressor communicates with the coil of the outdoor unit through a four-way valve, and an expansion valve is arranged on the coil of the outdoor unit. , a gas collecting chamber is arranged in the indoor unit, a refrigerant concentration sensor is arranged in the gas collecting chamber, a temperature and humidity sensor is installed in the indoor unit, a controller is arranged on the indoor unit, a fan is arranged on the indoor unit, and the controller according to the detection result and the pre-stored The relationship determines whether the refrigerant leaks, and executes the corresponding control program. The method and device for detecting air-conditioning refrigerant leakage according to the present invention adopts the multi-level, difference comparison method of the same element in different states, and the cross-detection method of two detection elements, one inside and one outside, to correct the detection factors and reduce the Misjudgment improves the accuracy of refrigerant leakage detection, and to a great extent avoids further damage to the air conditioner compressor when the air conditioner is in use, improving the comfort of the user experience.

Description

technical field [0001] The invention relates to the technical field of air conditioners, and in particular, to a method and device for detecting the leakage of air conditioner refrigerants. Background technique [0002] With the continuous development of industrialization and the continuous acceleration of the urbanization process, people's requirements for the quality of life are constantly improving, and the use of air conditioners has become more and more common. [0003] Air conditioners rely on refrigerants to transport heat. A well-performing air conditioner has a certain amount of refrigerant charge, which will reduce the performance of the air conditioner more or less. For users of air conditioners, the problem that the air conditioner does not cool or has poor cooling effect is likely to occur when using the air conditioner, and the cause of the problem is often the leakage of refrigerant. Regarding the refrigerant leakage, there may be the following situations: 1....

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Problems solved by technology

Therefore, poor welding or loose connections will cause refrigerant leakage.

Refrigerant leakage not only causes the performance of the air conditioner to decline, but also causes the compressor to run in a poor condition. In severe cases, the compressor may even be damaged; as flammable refrigerants R32 and R290 are put into use, the leakage may cause an explosion and a crisis. User safety, so comprehensive and effective refrigerant leak detection is necessary

[0005] At present, the phenomenon of refrigerant leakage is generally discovered when the user feedbacks that the air conditioner is not cooling or the cooling effect is poor after the user installs the air conditioner. , and directly starting the compressor when there is a lot of leakage will cause permanent damage or even an explosion to the compressor

[0006] In the existing refrigerant leakage detection methods, only the comparison between the indoor coil temperature and the set coil temperature is used to judge whether refrigerant leakage occurs. , the indoor coil temperature will also change drastically, resulting in a huge difference between the indoor coil temperature and the set coil temperature, resulting in misjudgment of refrigerant leakage. Therefore, the logic judgment of the refrigerant detection method in the prior art is single, and misjudgment is easy to occur

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