Air conditioner defrosting control method and device

Abstract

The invention provides an air conditioning defrosting control method and device, and relates to the technical field of air conditioners. According to the air conditioning defrosting control method anddevice, the outdoor ambient temperature and the outdoor heat exchanger temperature collected and transmitted by a temperature collecting module are received, and since the outdoor heat exchanger temperature includes the first temperature and the second temperature, so that a defrosting mode can be determined according to the outdoor ambient temperature, the time difference between a time point when the second temperature is received and a time point when the first temperature is received, and then the defrosting of the air conditioner is controlled according to the defrosting mode. The thickness of a frost layer on an outdoor heat exchanger of an outdoor unit is determined by the outdoor ambient temperature and the time difference, so that a reasonable defrosting mode is adopted accordingto the thickness of the frost layer, and frost condensed on fins of the outdoor heat exchanger is eliminated, resources are saved, and the problem of large indoor room temperature fluctuation causedby defrosting directly using a four-way valve reversing method can be avoided. At the same time, the reversing frequency of a four-way valve is reduced, the failure rate of the four-way valve is reduced, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner defrosting control method and device. Background technique [0002] When the daily air conditioner is in heating operation, the condenser of the outdoor unit absorbs heat continuously, and the water vapor in the air will condense on the fins of the condenser to form frost. When the frost layer reaches a certain thickness, it will affect the heat exchange effect of the outdoor unit, so the heating It will defrost once after running for a period of time. [0003] At present, the commonly used defrosting mode is the four-way valve reversing mode. The system is switched to the refrigeration cycle, the internal and external fans are turned off, and the high-temperature refrigerant discharged from the compressor directly enters the condenser. The high-temperature refrigerant defrosts the condenser and comes out of the condenser The low-temperature refrigera...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used defrosting mode is the four-way valve reversing mode. The system is switched to the refrigeration cycle, the internal and external fans are turned off, and the high-temperature refrigerant discharged from the compressor directly enters the condenser. The high-temperature refrigerant defrosts the condenser and comes out of the condenser The low-temperature refrigerant passes through the indoor unit, and although the indoor fan is turned off, the heat transfer through radiation causes large fluctuations in the indoor ambient temperature, which seriously affects the user's comfort experience.

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