Air conditioner, control method of air conditioner and readable storage medium

Abstract

The invention provides an air conditioner, a control method of the air conditioner and a readable storage medium. The air conditioner comprises an indoor unit and an outdoor unit, the outdoor unit is connected with the indoor unit through an on-load communication line, and the outdoor unit comprises a current sampling circuit connected to the on-load communication line and used for detecting the current value of the on-load communication line; the power supply device is connected with the on-load communication line; and the outdoor control device is connected with the indoor unit, the power supply device and the current sampling circuit and used for controlling the power supply device to supply power to the indoor unit. By means of the technical scheme, the short circuit occurrence condition can be flexibly and accurately judged according to the real-time load, on the basis that normal operation of the air conditioner is not affected, it is ensured that overcurrent protection is effectively controlled in time when short circuit occurs, the safety of power supply and power utilization of the air conditioner is guaranteed, potential safety hazards are reduced to the minimum, and the service life of the air conditioner is prolonged. And the occurrence rate of electrical fire is greatly reduced.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to an air conditioner, a method for controlling the air conditioner and a readable storage medium. Background technique [0002] In the existing air conditioning system, if multiple indoor units suddenly lose power, the electronic expansion valves of the indoor units may not be completely closed at this time. Since the fan of the indoor unit is turned off when the power is off, the refrigerant cannot evaporate, and the liquid refrigerant will accumulate for a long time, which will easily cause the liquid refrigerant to enter the compressor, thereby damaging the compressor, and will also cause water condensation in the indoor unit, and even water leakage in severe cases. In addition, when the system needs to return oil or defrost, if the electronic expansion valve of the power-off indoor unit is closed, and the power-off indoor unit accounts for a certain proportion,...

AI Technical Summary

Problems solved by technology

If the short-circuit resistors are concentrated in one piece, the large short-circuit current will cause the system to heat up rapidly, and the temperature will rise. In severe cases, it will become a fire point and bring safety hazards.

When short-circuit protection is carried out by switching power supply, in order to ensure safety, the protection value is required to be set very small. However, if there are multiple internal units in a system that are powered off and the valve is closed, the current of closing the valve plus the current of each internal unit The normal standby current will be relatively large, and the two contradict each other, which will also affect the normal operation of the air conditioner

Images