A method for controlling oil return in a multi-line system
A multi-line system and control method technology, applied in the direction of refrigerators, compressors, compressors, etc., can solve the problem of inaccurate oil return, achieve sufficient oil volume, improve oil return reliability, and improve reliability
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[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0045] In the oil return control method of the multi-connected system of this embodiment, the multi-connected system includes an indoor unit and a plurality of outdoor units, the plurality of outdoor units are respectively connected to the indoor unit, and the indoor unit includes a plurality of parallel-connected indoor units.
[0046] For example, a multi-split system includes two outdoor units: the first outdoor unit and the second outdoor unit; see figure 1 As shown; the first outdoor unit includes a compressor 101, an oil separator 102, a one-way valve 103, a four-way valve 104, an outdoor heat exchanger 105, a gas-liquid separator 106, etc., and an oil level sensor 107 is arranged in the compressor 101 , used to detect the oil level of the re...
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