Control method of multi-connected air conditioner and system and computer readable storage medium

Abstract

The invention discloses a control method of a multi-connected air conditioner and a multi-connected air conditioner system and a computer readable storage medium. The method comprises the steps of detecting whether the overheating degree of each outdoor unit meets the target requirement; if the overheating degree of each outdoor unit meets the target requirement, performing first judgment on whether the average discharge temperature of each outdoor unit is equal to that of an outdoor unit system; if the average discharge temperature of each outdoor unit is not equal to that of the outdoor unit system, performing second judgment on whether the overheating degree of a passage on which an electronic expansion valve of each outdoor unit is located is greater than a first preset value; if the overheating degree of the passage on which the electronic expansion valve of each outdoor unit is located is greater than the first preset value, performing third judgment on whether the average discharge temperature of each outdoor unit is greater than that of the outdoor unit system; if the average discharge temperature of each outdoor unit is greater than that of the outdoor unit system, increasing the opening of the electronic expansion valve; and if the average discharge temperature of each outdoor unit is not greater than that of the outdoor unit system, reducing the opening of the electronic expansion valve. According to the control method, the opening of the injection electronic expansion valve is controlled, so that the problem of nonuniformity in distribution of refrigerant is solved, and the discharge temperature of the system is effectively controlled.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a control method of a multi-connected air conditioner, a multi-connected air conditioner system and a computer-readable storage medium. Background technique [0002] Multi-connected air-conditioning units, especially parallel multi-connected units, are affected by the installation location, installation pipeline, distance between outdoor units and height difference during actual use, and it is prone to uneven distribution of refrigerant between outdoor units, resulting in outdoor If the outdoor unit runs abnormally, the outdoor unit with more refrigerant may experience liquid return, and the outdoor unit with less refrigerant may have a high exhaust temperature, and may suffer from oil shortage and wear, which may cause damage to the outdoor unit and compressor in severe cases. [0003] Outdoor units with different capacities can distribute the refrigerant throug...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a control method of a multi-connected air conditioner, a multi-connected air-conditioning system and a computer-readable storage medium, aiming at solving the problem of uneven distribution of refrigerant between outdoor units in a multi-connected air-conditioning system

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