Defrosting control method and device for air conditioner and air conditioner

Abstract

The invention provides a defrosting control method and device for an air conditioner and the air conditioner. The method comprises steps as follows: when the air conditioner runs in the heating mode, whether defrosting control can be performed on the air conditioner with first defrosting control logic or not is judged; if defrosting control can be performed on the air conditioner with the first defrosting control logic, defrosting control is performed on the air conditioner with the first defrosting control logic; and if defrosting control cannot be performed on the air conditioner with the first defrosting control logic, defrosting control is performed on the air conditioner with second defrosting control logic. With the adoption of the technical scheme, when default defrosting control logic of the air conditioner becomes invalid, defrosting control can be performed on the air conditioner continuously with standby defrosting control logic, then a system of the air conditioner can run in the heating mode continuously, the normal heating capacity of a unit is guaranteed, and the user experience can be improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner defrosting control method, an air conditioner defrosting control device and an air conditioner. Background technique [0002] At present, a variety of defrosting control methods have been proposed in the technologies related to air conditioners, but based on cost considerations, it is usually based on detecting the temperature of the refrigerant in the outdoor heat exchanger to control whether the air conditioner enters and exits defrosting. [0003] In practical applications, when the air conditioning system operates in a low-temperature and high-humidity environment that is prone to frost, due to the defrosting operation, it is easy to have a problem of large temperature and humidity fluctuations at the installation position of the sensor that detects the temperature of the refrigerant in the outdoor heat exchanger , which can easily lead to sensor f...

AI Technical Summary

Problems solved by technology

[0003] In practical applications, when the air conditioning system operates in a low-temperature and high-humidity environment that is prone to frost, due to the defrosting operation, it is easy to have a problem of large temperature and humidity fluctuations at the installation position of the sensor that detects the temperature of the refrigerant in the outdoor heat exchanger , which in turn can easily lead to sensor failure

When the sensor has faults such as short circuit, open circuit, and temperature drift, the air conditioner cannot complete the defrosting action normally, and the unit capacity and energy efficiency will decrease due to the accumulation of frost layer, and in severe cases, the air conditioning system will not be able to operate normally

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