Control method and device of multi-split air conditioning system and multi-split air conditioning system

Abstract

The invention provides a control method of a multi-split air conditioning system. The multi-split air conditioning system comprises a plurality of indoor units, wherein each indoor unit is provided with a first electronic expansion valve, and the control method comprises the following steps that the first electronic expansion valves of the first indoor units are closed in response to the first indoor units of the plurality of indoor units meeting a temperature shutdown condition; and the parameters of second indoor units of the plurality of indoor units are adjusted if the multi-split air conditioning system satisfies a first target condition, wherein the second indoor units involve the indoor units in an operating state, the first target condition is used for indicating that the amount ofrefrigerant flowing through the multi-split air conditioning system is lower than the target amount. According to the method, after the indoor units is in temperature shutdown, the electronic expansion vales of the indoor units are closed so as to avoid noise, meanwhile, by adjusting the parameters of the indoor units in the operating state, the situation that the amount of circulating refrigerant is insufficient caused by closing of the electronic expansion valves can be avoided, and normal operation of the multi-split air conditioning system is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, and in particular, to a control method and device for a multi-connected air-conditioning system and a multi-connected air-conditioning system. Background technique [0002] With the continuous development of air-conditioning technology, the use of air-conditioning has become more and more popular. With the popularity of air conditioners, for scenarios that require multiple air conditioners, in order to reduce the number of machines, a multi-connected air conditioner system that can drive multiple indoor units through one outdoor unit has emerged. When the multi-line air conditioning system is in the multi-line operation mode, the indoor unit will enter the shutdown mode when it reaches the temperature. Among them, in order to ensure that the indoor unit can quickly resume work when it exits the shutdown mode, the electronic expansion valve of the indoor unit that has reached a w...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is the problem that the indoor unit that shuts down at high temperature emits noise in the multi-connected air-conditioning system in the prior art, so as to provide an electronic expansion valve that can close the electronic expansion valve of the indoor unit that is shut down at warm temperature while ensuring the circulation The control method of multi-connected air conditioner with sufficient amount of refrigerant to overcome the defects in the prior art

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