An oil separator for a compressor is shown, wherein an oil separating efficiency is maximized and a material cost, a weight, and an assembly time are minimized. When a user moves content into a spreadsheet formulafunction bar, a cell reference for the content may automatically be created and disposed in the formulafunction bar, and if a user enters a math operation in a spreadsheet cell, corresponding operation sentence structure may be automatically inserted into the formulafunction bar. Each porous wick structure comprises an outer wick surface which is disposed at least one of against and near the inner shell surface and a porous inner wick surface defining a hollow inner wick chamber. The polymer complex compound of transition metal can be formed as a polymer metal complex with substituted tetra-dentate Schiffs base.