Fan and fan housing thereof having flapper

Abstract

A fan includes a motor base, a motor, an impeller, and a fan housing. The fan housing accommodates the motor base, the impeller, and the motor, and includes at least one flapper disposed at the corner of the fan housing via a plurality of connecting elements for covering the opening of the fan housing to prevent the air backflow.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of U.S. application Ser. No. 11 / 907,363, filed on Oct. 11, 2007, and claims priority to Taiwan Application Serial Number 095147374, filed on Dec. 18, 2006, the disclosure of which is hereby incorporated by reference herein in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of Invention[0003]The invention relates to a fan and a fan housing thereof, and, in particular, to a fan and a fan housing having a flapper.[0004]2. Related Art[0005]The computer system has become more complex, so the fans used in the computer system have to provide more efficient heat-dissipating ability. If one of the fans malfunctions while the computer system is operating, a backflow through the fan occurs since the interior of the computer system has negative pressure. The backflow will affect the airflow in the computer system and thus decrease the heat-dissipating ability of the fans. The prior art provides severa...

AI Technical Summary

Benefits of technology

[0009]In view of the foregoing, the invention is to provide a fan and fan housing with a flapper that can prevent the backflow problem caused by the negative pressure inside the computer system while the fan malfunctions. Moreover, the heat-dissipating efficiency of the fans can be maintained, and the manufacturing cost and installation space can be decreased.

[0012]As mentioned above, the flapper of the invention is connected to the corner of the fan housing. Thus, the flapper is directly coupled to the fan housing, so that the fan housing does not occupy additional space, the additional elements for installing or fixing the flapper are unnecessary, and the structure and manufacturing of the fan housing are simplified. Compared with the prior art, the invention modifies the corner of the fan housing adjacent to the outlet and the other parts of the fan housing are remained. In the invention, the flapper can be closed by the negative pressure inside the computer system. Thus, the position and direction of the fan installed in the system are not limited, and the flapper can be closed. Accordingly, the heat-dissipating efficiency of the fans can be maintained, and the manufacturing cost and installation space can be decreased.

Problems solved by technology

If one of the fans malfunctions while the computer system is operating, a backflow through the fan occurs since the interior of the computer system has negative pressure.

The backflow will affect the airflow in the computer system and thus decrease the heat-dissipating ability of the fans.

Not only are they likely to depart from each other, it also takes more production cost and time.

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