A multi-connection system and its control method for preventing compressor liquid return
A multi-online system and control method technology, applied in the direction of compressors, compressors, compressors with reversible cycles, etc., can solve problems such as system performance degradation, impact on user experience, and failures.
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[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0023] Such as figure 1 shown.
[0024] A multi-line system for preventing compressor liquid return, including a compressor 1, an oil separator 2, a four-way valve 3, an indoor unit heat exchanger 8, an economizer 6, a heating electronic expansion valve assembly 5, and an outdoor unit The refrigerant circulation circuit composed of the heat exchanger 4 and the gas-liquid separator 9. Wherein, there are multiple indoor unit heat exchangers 8, and each indoor unit heat exchanger is respectively provided with an indoor unit electronic expansion valve 7 so as to perform heating operation efficiently. The evaporation side inlet of the economizer 6 is connected to the bottom of the gas-liquid separator 9 through a liquid outlet pipe 15, so that the liquid refrigerant in the gas-liquid separator 9 can be introduced into the economizer 6; the liquid outlet pi...
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