Anti-backflow centrifugal fan system

Abstract

The invention discloses an anti-backflow centrifugal fan system. The anti-backflow centrifugal fan system comprises an anti-backflow centrifugal fan and a heat dissipation module; the anti-backflow centrifugal fan comprises an anti-backflow fan upper cover, a centrifugal fan lower cover, centrifugal fan blades and a motor assembled with the centrifugal fan blades; the centrifugal fan lower cover comprises a centrifugal fan bottom shell, and a side wall formed by upwards extending along the edge of the centrifugal fan bottom shell; accommodating space is formed between the anti-backflow fan upper cover and the centrifugal fan lower cover, and is used for accommodating the centrifugal fan blades and the motor; the heat dissipation module comprises a heat pipe and fins arranged on the heat pipe; the anti-backflow fan upper cover outwards extends to form an extension part; the extension part extends to the top of the heat pipe; the extension length L of the extension part is not smaller than the width W of the heat pipe; and hot air currents are taken outside the system, so that the exhaust flow of the system is equal to the flow of the fan from a shell intake surface without generating backflow in the system.

Description

technical field [0001] The invention belongs to the technical field of heat dissipation of electronic products, and in particular relates to an anti-backflow centrifugal fan system. Background technique [0002] A traditional centrifugal fan system generally includes a fan and a cooling module. However, the defect of the existing fan is that the distance between the air inlet and the air outlet is relatively close, and it is easy to cause the hot air blown out to be sucked back into the system again, resulting in an increase in the temperature of the shell of the system and the temperature of the electronic components, and the acceleration of the electronic components. Device aging and affecting user experience. [0003] Moreover, a gap of 0.8 mm to 1.0 mm needs to be reserved between the fan and the heat dissipation module. The gap at this position will generate partial air flow backflow. Therefore, the air flow rate of the traditional centrifugal fan system is equal to th...

AI Technical Summary

Problems solved by technology

However, the defect of the existing fan is that the distance between the air inlet and the air outlet is relatively close, and it is easy to cause the hot air blown out to be sucked back into the system again, resulting in an increase in the temperature of the shell of the system and the temperature of the electronic components, and the acceleration of the electronic components. Device aging and affecting user experience

[0003] Moreover, a gap of 0.8 mm to 1.0 mm needs to be reserved between the fan and the heat dissipation module. The gap at this position will generate partial air flow backflow. Therefore, the air flow rate of the traditional centrifugal fan system is equal to the air intake surface of the fan from the case. flow minus return flow

[0004] Therefore, the existing centrifugal fan system still needs to be improved and developed

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