A PARTITION CONTROLLED MULTI - LINE SYSTEM AND ITS SELF - IDENTIFICATION CONTROL METHOD

The invention discloses a multi-split system with partitioned control. An output end of a compressor 1 is in communication with first interfaces of a first four-way valve 4, a second four-way valve 5, and a third four-way valve 6 respectively, a third interface C of the first four-way valve 4 is in communication with one end of an outdoor heat exchanger 2, a second interface E of the second four-way valve 5 is in communication with one end of one indoor unit set 3 therein, a third interface C of the third four-way valve 6 is in communication with one end of the other indoor unit set 3, and the other end of the outdoor heat exchanger 2 and the other ends of the indoor unit sets 3 are in communication with each other in a convergent manner; the remaining interfaces of the second four-way valve 5 and the third four-way valve 6 are all in communication with an air return end of the compressor 1. By independently adjusting the power on/off actions of the second four-way valve 5 and the third four-way valve 6, a heating mode or a cooling mode of each indoor unit set 3 is controlled correspondingly and independently, and the cooling and heating modes of different areas can be achieved through one multi-split system, thereby achieving the purpose of reducing costs and improving efficiency.