Air-conditioning system and method for controlling the amount of refrigerant used therefor

Abstract

The invention provides a refrigerant quantity control method used for an air conditioning system. The air conditioning system comprises an outdoor unit and multiple indoor units. The outdoor unit is provided with a condenser, and each indoor unit is provided with an evaporator, an electronic expansion valve and a solenoid valve. The control method comprises the following steps: the operating state of each indoor unit is detected; when at least one of the multiple indoor units is switched off, first temperature parameters of the condenser are detected, second temperature parameters of the evaporator in one indoor unit or each indoor unit which is switched on are detected, and the outdoor environment temperature and indoor environment temperature are detected; according to the first temperature parameters, the second temperature parameters, the outdoor environment temperature and the indoor environment temperature, the electronic expansion valve and the solenoid valve of each indoor unit are controlled to realize control over refrigerant quantity. By means of the refrigerant quantity control method, the performance of the air conditioning system can be improved, and the reliability of an air conditioning system compressor can be improved. The invention also provides the air conditioning system.

Description

technical field [0001] The invention relates to the technical field of air-conditioning control, in particular to an air-conditioning system and a method for controlling the amount of refrigerant used in the air-conditioning system. Background technique [0002] At present, the optimal amount of refrigerant in the operation of a multi-air conditioner is mainly determined according to the rated point. For example, some air conditioners with one drag and more determine their optimal refrigerant according to five rated points such as A2, B2, EV, B1, and F1. However, in general, the determination of the rated point is selected when all the indoor units are in the running state, but in fact, when the one-to-many air conditioners are running, not all the indoor units are in the running state, for example, only one If only one indoor unit is running, or only two indoor units are running, the optimal amount of refrigerant determined by the original rated point is no longer the optim...

AI Technical Summary

Problems solved by technology

[0002] At present, the optimal amount of refrigerant in the operation of a multi-air conditioner is mainly determined according to the rated point. For example, some air conditioners with one drag and more determine their optimal refrigerant according to five rated points such as A2, B2, EV, B1, and F1. However, in general, the determination of the rated point is selected when all the indoor units are in the running state, but in fact, when the one-to-many air conditioners are running, not all the indoor units are in the running state, for example, only one If only one indoor unit is running, or only two indoor units are running, the optimal amount of refrigerant determined by the original rated point is no longer the optimal amount of refrigerant for the mode in which the air conditioner is running. During the operation of the one-to-multiple air conditioner, there is basically no refrigerant or a very small amount of refrigerant in the indoor unit, so the amount of refrigerant in the running indoor unit and outdoor unit is too much, and the performance and reliability of the one-to-multi-air conditioner are reduced.

Images