Patent ID: 7708538

Claim:
A package type oil free screw compressor comprising: a low pressure stage compressor airend; a high pressure stage compressor airend; a gear casing having a step-up gear; a driving apparatus for driving each of said compressor main bodies via said step-up gear; a low pressure stage cooling system apparatus cooling a compression gas discharged from the low pressure stage compressor airend; a high pressure stage cooling apparatus cooling a compression gas discharged from the high pressure stage compressor airend; a lubricating oil cooling apparatus cooling a lubricating oil lubricating said step-up gear; and a package in which said low pressure stage compressor airend, said high pressure stage compressor airend, said gear casing, said driving apparatus, said low pressure stage cooling system apparatus, said high pressure stage cooling apparatus and said lubricating oil cooling apparatus are packaged, wherein said low pressure stage compressor airend, said high pressure stage compressor airend and said driving apparatus are integrated, said driving apparatus is installed in a base common with a base installing the other devices, said low pressure stage cooling system apparatus, said high pressure stage cooling apparatus and said lubricating oil cooling apparatus are arranged in an upper portion of said package, an intake duct sucking an ambient air is arranged in one side surface of said package, and said intake duct physically supports at least one end of at least one of said low pressure stage cooling system apparatus, said high pressure stage cooling apparatus and said lubricating oil cooling apparatus arranged in an upper portion of the package.