Exhaust protection control method and system for air conditioner

Abstract

The invention discloses an exhaust protection control method and system for an air conditioner. The control method comprises the steps of setting an exhaust temperature threshold value T0 and an exhaust temperature duration threshold value t0; detecting the exhaust temperature T of a compressor and the temperature duration t; and comparing the exhaust temperature T with the exhaust temperature threshold value T0, comparing the exhaust temperature duration t with the time threshold value t0 and judging an exhaust protection mode of the compressor according to the comparison results. According to the method and the system, frequent frequency conversion or starting and stopping of the compressor can be effectively avoided, the use efficiency of the system can be improved, and the service lifeof the compressor can be prolonged.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to an air-conditioner exhaust protection control method and system. Background technique [0002] The discharge protection control method adopted by the traditional inverter air conditioner is that when the temperature sensing package at the discharge end of the compressor detects that the temperature of the refrigerant exceeds the limit value of the discharge temperature, the program of the controller issues an instruction to reduce the frequency of the compressor or use The compressor stops working, and when the exhaust gas temperature reaches a safe value, the controller issues an instruction to increase the frequency or start, so as to realize the protection of the compressor. [0003] Although the method adopted by the above-mentioned traditional inverter air conditioner has played the role of exhaust protection, it has the following defects: simply based on ...

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Problems solved by technology

[0003] Although the method adopted by the above-mentioned traditional inverter air conditioner has played the role of exhaust protection, it has the following defects: simply based on the exhaust temperature to determine whether to enable frequency reduction or shutdown protection, the accuracy of the judgment cannot be guaranteed, resulting in frequent compressor failures. Frequency conversion or start and stop will affect the system efficiency and the service life of the compressor, especially the implementation of exhaust protection through frequency reduction will cause conflicts between the control of unit efficiency adjustment and frequency reduction protection, resulting in the possibility of system logic judgment confusion

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