Package structure of inverter apparatus and method of manufacturing the same

1. A package structure of an inverter apparatus comprising:

at least four metal column supports arranged vertically to be spaced apart from each other at corner portions, each of said metal column supports being an aluminum die-cast support, and comprising sheet-metal mounting tapped holes, sheet-metal beam mounting notches, and unit hanging holes; and

sheet-metal bent beams connecting the column supports in transverse direction and longitudinal direction to form a rectangular package structure, each of said sheet-metal bent beams having a U-shape in cross section and being disposed in the sheet-metal beam mounting notches so that the sheet-metal bent beams are connected to the column supports by screws passing through holes of the sheet-metal bent beams and the sheet-metal mounting tapped holes to thereby form the rectangular package structure,

wherein each of said column supports includes a vertical section having the sheet-metal mounting tapped holes and the sheet-metal beam mounting notches, and a lateral section crossing the vertical section to form a cross shape and having the unit hanging holes for hanging the inverter apparatus.

2. A package structure of an inverter apparatus according to claim 1 , wherein the sheet-metal tapped holes are arranged to penetrate the column supports in two directions perpendicular to each other.

3. A package structure of an inverter apparatus according to claim 2 , wherein each of the vertical sections includes two side walls, an intermediate wall, and a plurality of lateral walls connecting the two side walls and the intermediate wall.