| 摘要 |
PROBLEM TO BE SOLVED: To provide a series connection module by which wind entering amount and wind discharging amount can be increased, the wind entering amount can be supplemented under abnormal condition of the fan wheel, noise caused by air can be suppressed, and radiation efficiency of the whole module can be surely enhanced. SOLUTION: A first fan unit is provided with a first fan wheel. A second fan unit is provided with a second fan wheel. The first and second fan units are arranged so as to be connected in series by a connecting member. The wind entering port is formed around a connecting surface of cabinets of the first and second fun units so as to increase the wind entering amount and the wind discharging amount. When the efficiency of ventilation is deteriorated due to an abnormal operation of the first fan unit, the second fan wheel of the second fan unit supplements the wind feed through the wind entering port. COPYRIGHT: (C)2005,JPO&NCIPI
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