Patent ID: 9057374
Filing Date: 2015-06-16
Classification: F04C

Abstract:
1. An oilless screw compressor system comprising a first water cooled cooling unit for cooling compressed air discharged from a low pressure stage compressor body, and a second water cooled cooling unit for cooling compressed air discharged from a high pressure stage compressor body, the high pressure stage compressor body compressing the compressed air discharged from the low pressure stage compressor body, wherein the first cooling unit is provided with a first plate type heat-exchanger, the second cooling unit is provided with a second plate type heat-exchanger, and an amount of cooling water in the plate type heat-exchangers is adjustable, wherein the amount of the cooling water is adjusted or a flow of the cooling water is stopped, in accordance with a pressure of compressed air at an inlet or an outlet port of at least one of the plate type heat-exchangers or a temperature of the cooling water at an outlet port of at least one of the plate type heat-exchangers, wherein the first heat-exchanger for cooling the compressed air discharged from the low pressure stage compressor body is arranged apart from the second heat-exchanger for cooling the compressed air discharged from the high pressure stage compressor body, and wherein the cooling water is fed into the first heat-exchanger for cooling the compressed air discharged from the low pressure stage compressor body after it is fed into the second heat-exchanger for cooling the compressed air discharged from the high pressure stage compressor body.