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Bi-directional Blowers for Cooling Laptop Computers

a laptop computer and bi-directional technology, applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problems of the same size centrifugal blower not being as efficient as the axial fan, and achieve the effect of improving the heat dissipation efficiency of the laptop, facilitating bi-directional functions, and improving the flow capacity

Inactive Publication Date: 2006-04-13
NONLINEAR TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] The special object of the invention is that a pressure-type bi-directional blower can enhance heat dissipation for a laptop because the cool (room temperature) air is sucked into the box as well as the hot air is blown out because intakes or outlets are designed on the sides. Thus the air gap between laptop bottom and desk top can be eliminated so that the table can be served as a natural heat sink.
[0009] A very valuable object of the invention is that various rotary blades are explored, for example, a combination of blades and impeller which makes the bi-directional functions more efficiently.

Problems solved by technology

However, it is a real challenge to make it happen because of the compact design with many different components such as CPU, PCI components, graphics and network processors, memory and other components.
Axial fans are normally used in desktop, server systems because axial fans are the most efficient way to move air in same direction, but blowers are commonly used for laptop cooling because of the space limitation.
A same size centrifugal blower is not as efficient as an axial fan because of these reasons: 1) the intake size is much smaller; 2) the air mass moves out of the blades driven by centrifugal force due to the high rotational speed of the blades or impellers; 3) most of the air mass will have to go through the circular tunnel before it escapes through outlet; 4) and further, the air is dragged by the tunnel walls during circular movement.
Overheating is a common problem for high power laptop, although blowers have had to be used for laptop cooling due to space limitation.

Method used

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  • Bi-directional Blowers for Cooling Laptop Computers
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  • Bi-directional Blowers for Cooling Laptop Computers

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Embodiment Construction

[0018] Detailed descriptions of the preferred embodiment are provided herein. However, it is to be understood, that the present invention may be embodied in other forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but rather as a basis for the claims and as a representative basis for a skilled one to understand the principle of the invention.

[0019] To accomplish the important function of the invention, there is shown in FIG. 1 the pressure type bi-directional blower used for a laptop computer. It is assembled with a motor 120 fitted in the drum of the rotary blade 130, the stator of the motor 120 is mounted on the housing frame 110, and the optional cover 140. The structure of the housing is the vital part of the invention. The broken walls 112 and 113 form a separate zone with the conjunction of the blades 130 to separate the suck-in and blow-out regions, such that the intake 102 draws hot air into the blower and blows out through outlet 101...

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PUM

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Abstract

Bi-directional Blowers capable of sucking-in ambient air and blowing-out hot air from system box simultaneously are invented to cool computer or electronic systems. The application to cooling laptop computers is disclosed in very details. The bi-directional blowers are comprised of a DC or AC motor, a rotary part of blades and / or impellers, an optional cover, and a housing frame with built-in broken walls, stationary blades and airfoils, which control the flow volume and direction. The separate zone to divide the blow-out and suck-in channels is constructed using the broken walls with conjunction of the blades and / or impellers. The rotary part is the radial blades, or a combination of blades and impellers. Two types of bi-directional blowers are explored: the pressure type and hybrid type. A one-way blower of pressure type utilizes the same principle of the bi-directional blowers such that the inlet and outlet can be located on sides of the blower. With the advantages of the invention, the air gap between laptop bottom and top surface of the desk can be eliminated for better heat conduction through lower side because the desk can be used as a natural heat sink.

Description

BACKGROUND OF THE INVENTION [0001] This invention relates generally to the field of thermal management for computer and electronics systems and more specifically to bi-directional blowers for cooling laptop computers. [0002] Fans and blowers are the essential components in the active air cooling for computer and electronics systems, as the power is increasing dramatically. To extend air cooling limit and make more efficient air cooling, duct cooling must be utilized. Because the heat density in a system is different in various zones, the ideal approach is to remove heat from hot region to outside of system box immediately through duct. However, it is a real challenge to make it happen because of the compact design with many different components such as CPU, PCI components, graphics and network processors, memory and other components. [0003] Axial fans are normally used in desktop, server systems because axial fans are the most efficient way to move air in same direction, but blowers...

Claims

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Application Information

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IPC IPC(8): F04D29/44F04D17/08F04D29/42
CPCF04D17/04F04D29/4246F04D29/444F04D25/0613F04D29/424
Inventor ZHENG, WEN-CHUN
Owner NONLINEAR TECH INC
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