Multi-line system

Abstract

The invention discloses a multi-split system. The multi-split system comprises an outdoor unit device, a flow division device and multiple indoor unit devices, wherein the flow division device comprises a gas-liquid separator; the outdoor unit device comprises a compressor, a four-way valve and an air supplementation electromagnetic valve; one end of the air supplementation electromagnetic valve is connected between an air outlet of the compressor and a first valve opening of the four-way valve; the other end of the air supplementation electromagnetic valve is connected to an inlet of the gas-liquid separator; heating indoor unit devices in the multiple indoor unit devices are used for repeatedly collecting the air supply temperature, judging whether the multi-split system needs air supplementation or not according to the repeatedly-collected air supply temperature and sending air supplementation signals to the outdoor unit device through the flow division device when the multi-split system needing the air supplementation is judged so as to regulate the air supplementation electromagnetic valve by the outdoor unit device according to the air supplementation signals. According to the multi-split system disclosed by the invention, appropriate gaseous refrigerants can be timely supplemented when the gaseous refrigerants needed by heating indoor units are accurately judged to be insufficient, and thus the best effect of carrying out refrigerating and heating at the same time can be realized.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a multi-connected system. Background technique [0002] With the continuous development of air-conditioning technology and the strengthening of people's awareness of environmental protection, heat recovery multi-line systems are becoming more and more popular in the market. The two-pipe heat recovery multi-connection system is one of the mainstream heat recovery multi-connection systems on the market. Among them, the two-pipe heat recovery multi-connection system can realize simultaneous cooling and heating, and the gas and liquid refrigerants are distributed to different indoor unit. [0003] In the actual operation of the multi-connected system, when the system is in the main cooling mode, the actual heat release of the outdoor heat exchanger will be greater than the heat release load of the system. At this time, the gas-liquid two-phase refrigerant flowing to the spl...

AI Technical Summary

Problems solved by technology

[0003] In the actual operation of the multi-connected system, when the system is in the main cooling mode, the actual heat release of the outdoor heat exchanger will be greater than the heat release load of the system. At this time, the gas-liquid two-phase refrigerant flowing to the splitter device Insufficient refrigerant leads to insufficient heating capacity of the internal unit or fluctuations in the outlet air temperature, which adversely affects the user's comfort

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