| 摘要 |
PURPOSE: A ventilation fan of a refrigerator is provided to enable air to stably flow along a blade when a ventilation fan rotates, since an auxiliary plate is installed on the rear end of the blade and the constant-pressure surface of the blade faces the constant-pressure surface of the auxiliary plate. CONSTITUTION: A ventilation fan of a refrigerator comprises a main board, a hub, a plurality of blades(420), a shroud, and an auxiliary plate(450). The main board forms the bottom of the ventilation fan and has a disc shape. The hub is protruded from the central part of the main board and is connected to a fan motor. The blade is formed perpendicularly to the main board and has an air foil shape. The shroud connects the ends of the blades at the place facing the main board. The auxiliary plate is formed on the rear end of the constant-pressure surface of the blade and is protruded to a direction of crossing the average camber line of the blade.
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