INTEGRATED FAN COOLING SYSTEM

摘要

PROBLEM TO BE SOLVED: To obtain an integrated fan cooling system capable of obtaining sufficient ventilation for cooling and having high fan efficiency. SOLUTION: A gap between the outer boundary of an impeller 5 and the inner boundary surface of a fan-housing recessed part 1 is gradually increased toward the downstream part of air blasting. A gap between the inner boundary of the air inlet port of a casing cover and the outer boundary of an impeller boss part is gradually decreased toward the downstream side of the air blasting. A reflux preventing rib 9 is formed between the blowout port 2 of a fan casing 3 and the upperstream part of the air blasting. Thus, sufficient ventilation is obtained to enhance fan efficiency.