REFRIGERANT COMPRESSION PLANT Russian patent published in 2017 - IPC F04B39/02 F04B41/06 

FIELD: machine engineering.

SUBSTANCE: plant includes a casing, at least one low pressure stage and at least one high pressure stage leading to the low pressure stage, starting from the refrigerant suction port, a suction channel, an intermediate pressure channel leading from the low pressure stage to the high pressure stage, a high-pressure tube connected to the high pressure stage. The plant also includes and lubricant tank staying under intermediate pressure in the intermediate pressure channel, so that a sufficient supply of lubricant for the low pressure stage is always ensured. The lubricant supply device selects the lubricant from the lubricant tank and supplies the sucked refrigerant to the low pressure stage in the suction path.

EFFECT: sufficient lubricant supply to the low-pressure stage.

22 cl, 13 dwg