Water-Cooled Oil-Free Air Compressor

A water-cooled oil-free air compressor comprising:

• a low pressure stage compressor body;
• an intercooler for water-cooling compressed air discharged from the low pressure stage compressor body;
• a high pressure stage compressor body for further compressing the compressed air cooled by the intercooler;
• and
• an aftercooler for water-cooling air discharged from the high pressure stage compressor body,
• wherein the intercooler includes a plurality of intercooler units;
• wherein the aftercooler includes a plurality of aftercooler units;
• wherein the intercooler units each have a cooling water inlet and a cooling water outlet;
• wherein the aftercooler units each have a cooling water inlet and a cooling water outlet;
• and
• wherein a first cooling water path is provided to supply cooling water first to one aftercooler unit, then to one intercooler unit and a second cooling water path is provided to supply cooling water first to another aftercooler unit, then to another intercooler unit.