Patent ID: 11859881
Assignee: CARRIER CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A refrigeration system, comprising:
a main circuit configured to connect, through a pipeline, to a multi-stage compressor, a condenser, an economizer, a main throttling element, and an evaporator;
an gas supply branch configured to connect, through a pipeline, to the gas outlet of the economizer and an intermediate stage gas inlet of the multi-stage compressor; and
a liquid injection branch configured to connect to the intermediate stage gas inlet of the multi-stage compressor from a section having a high-pressure liquid-phase refrigerant in the main circuit;
wherein the liquid injection branch includes a liquid injection valve for controllably turning on or off the liquid injection branch;
further comprising a vibration sensor and/or a noise sensor provided on the condenser and/or a compressor guide vane opening sensor arranged in the multi-stage compressor; wherein, the liquid injection valve turns on the liquid injection branch when the detection result of the vibration sensor exceeds a preset vibration value and/or the detection result of the noise sensor exceeds a preset noise value and/or the compressor guide vane opening is less than a preset guide vane opening value.