Control method for air-conditioning system, control device and air-conditioning system

Abstract

The invention discloses a control method for an air-conditioning system. The control method comprises the following steps: starting up a compressor while meeting a preset condition; within a preset detecting time range, controlling the compressor to stop when the current environment temperature is within the preset temperature range and an operation current value of the air-conditioning system is not smaller than a set current value; controlling the compressor to stop when the current environment temperature exceeds the preset temperature range and the operation current value is not smaller than the set current value, and re-starting the compressor after the first time; then, controlling the compressor to stop when the operation current value is not smaller than the set current value and a pressure value of a gas exhaustion tube of the compressor exceeds a preset range. The control method for the air-conditioning system disclosed by the invention can be used for controlling the compressor to stop when the operation current of the air-conditioning system is overhigh due to faults, so that the compressor is no longer started before the faults are removed, the phenomenon of repeatedly starting and stopping the compressor is avoided, and the damage probability of the compressor is reduced. The invention further discloses an air-conditioning system and a control device thereof.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning system control, and in particular relates to a control method, a control device and an air-conditioning system of the air-conditioning system. Background technique [0002] With the development of the economy, the application of air-conditioning system is becoming more and more common. The stable and reliable operation of the air-conditioning system affects the normal production and life. [0003] When the existing air conditioning system is abnormally dirty and blocked, the high and low pressure difference of the system is getting higher and higher due to the obstruction of the refrigeration or heating circuit. If the power is cut off due to high startup overload protection, the air conditioning system will start automatically after a period of time. If the dirty blockage cannot be removed in time, the compressor will enter overload protection again, and so on. When the power supply vol...

AI Technical Summary

Problems solved by technology

[0003] When the existing air conditioning system is abnormally dirty and blocked, the high and low pressure difference of the system is getting higher and higher due to the obstruction of the refrigeration or heating circuit. If the power is cut off due to high startup overload protection, the air conditioning system will start automatically after a period of time. If the dirty blockage cannot be removed in time, the compressor will enter overload protection again, and so on.

When the power supply voltage of the air conditioning system is too low, the compressor will also start and stop repeatedly.

[0004] The repeated start and stop of the above-mentioned compressor makes the compressor run repeatedly under the high current state, the heat generated by the motor coil increases and the coil short-circuits and burns out, and the damage probability of the compressor increases

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