Patent ID: 7426111

Claim:
A rack structure formed by arranging a plurality of shelves at respective stages within a rack, each shelf accommodating a plurality of printed circuit boards having electronic components mounted thereon, parallel to each other, in a box-shaped body having openings in a top and a bottom, and disposing, between the plurality of shelves, fans for causing forced ventilation of air from the opening in the bottom to the opening in the top of the shelf immediately below, and heat shield plates each for blocking air delivered from the fans from entering an inside of the shelf immediately above and guiding delivery of the air, comprising: heat-dissipating walls arranged at sides of the rack to face air delivery openings of the heat shield plates, each of the heat-dissipating walls having a plurality of fins extending vertically, and forming heat-dissipating ducts which extend vertically, between grooves formed between adjacent ones of the fins and associated side walls of the shelves.