Multi-split air conditioning system

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to a multi-split air conditioning system. The invention aims to solve the problem that a plurality of indoorunits of an existing multi-split central air conditioner cannot flexibly operate in different working modes while the conciseness of a pipeline system of the existing multi-split central air conditioner is difficult to guarantee. A heat exchanger of each indoor unit of the multi-split air conditioning system allows a high-temperature refrigerant and a low-temperature refrigerant to flow in at thesame time. Under the condition, the heat exchangers of the indoor units can emit different expected heat or coldness by controlling the flow ratio of the high-temperature refrigerant to the low-temperature refrigerant, so that the different heat exchangers have different heat exchange capacities, the free selection of the working mode of any indoor unit is realized, and therefore the multi-split air conditioning system has multiple working modes (refrigeration / heating / partial refrigeration and partial heating), and the diversity of the overall operation condition of the multi-split air conditioning system is improved under the condition that a complex refrigerant switching pipeline is not additionally arranged.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to a multi-connected air conditioner system. Background technique [0002] With the continuous improvement of people's living standards, people have also put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature in medium and large places, the multi-connected air conditioning system has become an essential heat exchange equipment. In the current market, most of the multiple indoor units of the multi-connected central air conditioner are connected to the same refrigerant circuit in parallel, so as to communicate with the outdoor unit through the refrigerant circuit. In this case, when some indoor units are in cooling or heating mode, the remaining indoor units can only choose the same operating mode or not operating, but not different modes, that is, all indoor units can only operate in the same...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the existing multi-connected central air conditioner is difficult to realize the flexible operation of multiple indoor units in different working modes while ensuring the simplicity of its pipeline system, the present invention provides a A multi-connected air-conditioning system, the multi-connected air-conditioning system includes a first heat exchange coil, a second heat exchange coil and a plurality of indoor units, the first heat exchange coil and the second heat exchange coil flow The indoor unit includes a heat exchanger connected to the first heat exchange coil through a first refrigerant input pipe and a first refrigerant output pipe, so that the first heat exchanger The refrigerant in the heat coil can flow into the heat exchanger through the first refrigerant input pipe, and the refrigerant in the heat exchanger can flow into the first heat exchange plate through the first refrigerant output pipe In the pipe, the first refrigerant input pipe is provided with a first valve, the first valve is set to be able to adjust the refrigerant flow rate in the first refrigerant input pipe, and the heat exchanger also passes the second refrigerant The input pipe and the second refrigerant output pipe are connected to the second heat exchange coil, so that the refrigerant in the second heat exchange coil can flow into the heat exchanger through the second refrigerant input pipe, and The refrigerant in the heat exchanger can flow into the second heat exchange coil through the second refrigerant output pipe, the second refrigerant input pipe is provided with a second valve, and the second valve set to be able to adjust the refrigerant flow rate in the second refrigerant input pipe

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