Air conditioning device and method used for judging whether operating state of air conditioning device is normal or not

Abstract

The invention relates to an air conditioning device and a method used for judging whether an operating state of the air conditioning device is normal or not. The method comprises the following steps of obtaining an air inlet temperature and an air outlet temperature of the air conditioning device after a compressor of the air conditioning device stably operates for first preset duration with highest operating frequency permitted under the current working condition; calculating an absolute value of the difference between the air outlet temperature and the air inlet temperature; and judging thatthe operating state of the air conditioning device is normal when the absolute value of the difference between the air outlet temperature and the air inlet temperature is greater than or equal to a preset temperature difference threshold value. The heating and refrigerating effect of the air conditioning device can be directly reflected with the air outlet temperature when the compressor stably operates with the highest operating frequency, and therefore, the absolute value of the difference between the air outlet temperature and the air inlet temperature can accurately and timely reflect a refrigerant amount condition in a refrigerating system of the air conditioning device, and accuracy and timeliness of judging are improved. Meanwhile, an obtaining way for the air inlet temperature andthe air outlet temperature is very simple, the internal structure of the air conditioning device is simplified, and the cost is reduced.

Description

technical field [0001] The invention relates to common electrical appliances, in particular to an air conditioner and a method for judging whether the operating state of the air conditioner is normal. Background technique [0002] After long-term operation of the air conditioner, various abnormal phenomena will appear. For example, when the air conditioner is operated for a long time, the refrigerant will gradually leak into the air. When the refrigerant is less than a certain level, the cooling and heating effect of the entire air conditioner will be linear. decline. [0003] At present, the commonly used refrigerant quantity detection methods are as follows: [0004] (1) Use the outdoor ambient temperature, outdoor unit piping temperature and indoor unit piping temperature to comprehensively judge whether the amount of refrigerant is sufficient; [0005] (2) Use the difference between the indoor ambient temperature and the indoor heat exchanger temperature to judge wheth...

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned refrigerant amount detection methods are based on many parameters or complicated acquisition methods, so it may not be possible to accurately or accurately judge whether the refrigerant in the air-conditioning device is missing or insufficient, and even misjudgment may occur

In addition, some of the refrigerant quantity detection methods mentioned above are only applicable to fixed-frequency air conditioners, and the scope of application is relatively narrow.

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