A control method for a mix-and-match multi-connection system

Abstract

The invention discloses a control method of a mixed-matching multi-connection system. Step A. When each indoor unit is initially powered on, calculate and determine the indoor unit based on the capability of the indoor unit and the current working mode. The initial opening and opening adjustment range of the electronic expansion valve of the unit; Step B. Each indoor unit that is powered on for initial operation is based on the difference between the heat exchanger inlet temperature TA and the heat exchanger outlet temperature TB obtained in real time, And starting with the initial opening, adjust the electronic expansion valve of the indoor unit to the target opening within the opening adjustment range accordingly; Step C. The indoor unit after the initial adjustment is based on the real heat exchanger inlet temperature obtained in real time The difference between TA and the actual heat exchanger outlet temperature TB, starting from the last adjusted target opening, correspondingly adjust the electronic expansion valve of the indoor unit to the target opening within the opening adjustment range.

Description

technical field [0001] The present invention relates to the technical field of multi-connection systems, in particular to a control method for a mixed-matching multi-connection system. Background technique [0002] The return air of the indoor unit of the general air conditioner is the wind in the indoor room. This kind of wind has been circulating indoors and is generally not fresh. A comfortable indoor environment usually requires a certain amount of fresh air entering the room through the outside. Fan to get fresh air. [0003] The air return port of the fresh fan of the air conditioner needs to be connected to the air port to introduce fresh air from the outdoor side to the indoor room. Usually, when the ambient temperature outside the single room is higher than that of the indoor room (for example, the ambient temperature of the outdoor unit is 40°C, while the indoor ambient temperature is 27°C). , the return air temperature of the indoor unit of the fresh fan is the o...

AI Technical Summary

Problems solved by technology

Due to the large difference between the return air temperature of the fresh fan and the return air temperature of the ordinary indoor unit, if the fresh fan and the ordinary indoor unit are installed in the same system, they will usually affect each other. The temperature should not be too high. On the one hand, the temperature of the air sent by the ordinary indoor unit should not be too high. If it is too high, the human body will not feel cool.

Images