JP2014085973A - Heat dissipation device and portable information equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat dissipation device reducing hot air directly exposed to user's hand, and provide portable information equipment.SOLUTION: In a heat dissipation device including: a heat sink in which heat of an electronic component generating heat is conducted; and a fan that feeds air to the heat sink and discharges air from a side wall of a housing of a device body, the heat sink has many plate type fins arranged in parallel, and each fin is inclined in a direction away from a user from the inside of the housing toward the outside thereof, with respect to a normal line of the side wall of the housing.

Description

  The present invention relates to a heat radiating device and a portable information device, and more particularly to a heat radiating device and a portable information device in which a fan motor blows air to a heat sink provided in an active element that generates heat and the air is exhausted from a side wall of a housing.

An example of a portable information device is a notebook computer.
The notebook personal computer has a CPU (central processing unit) as an active element that generates heat, blows air from a fan motor to a heat sink provided in the CPU, and exhausts air from the casing side of the apparatus body (for example, (See Patent Document 1).

  The invention described in Patent Document 1 relates to a centrifugal fan. Specifically, an accommodation space for accommodating a rotor is formed by a rotor, and an upper cover and a lower cover composed of a top wall and a side wall, and the upper cover and the lower cover are formed. A centrifugal fan having a blower inlet installed at a position corresponding to one of the rotors and a first blower outlet installed on a side wall of the first blower outlet between the upper cover and the lower cover. An air guide part is installed on one side, the air guide part is provided with a guide wall installed along the blowing edge of the first air outlet, and the first air outlet is provided between the guide wall and the side wall of the air guide part. Adjacent second outlets are formed, and the outlet directions of the second outlets are orthogonal.

JP 2010-216482 A

  However, when the invention described in Patent Document 1 is used in a notebook computer in which a fan motor blows air to a heat sink provided in an active element that generates heat and is exhausted from the left side wall of the housing of the apparatus body. , There is an inconvenience that the hot air directly hits the left hand of the user.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a heat radiating device and a portable information device that reduce direct hot air from hitting a user's hand.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a heat dissipation comprising a heat sink that conducts heat of a heat generating electronic component, and a fan that blows air to the heat sink and exhausts it from a side wall of a housing of the apparatus body. In the apparatus, the heat sink has a large number of plate-shaped fins arranged in parallel, and the fins are directed from the inside of the housing to the outside with respect to the normal of the side wall of the housing. It inclines in the direction away from.

  ADVANTAGE OF THE INVENTION According to this invention, provision of the heat radiating device and portable information device which avoided that a hot air hits a user's hand directly is realizable.

It is a figure which shows the state in use of the notebook personal computer as a portable information device. FIG. 2 is an external perspective view showing a state in which components such as a keyboard 104, a track pad, and a cover are removed from the apparatus main body 101 of the notebook computer 100 shown in FIG. FIG. 3 is an enlarged view of a region surrounded by a broken line A of the device main body 101 of the notebook computer 100 shown in FIG. 2. It is a conceptual diagram of the normal heat radiating device as a comparative example.

<Configuration>
The present embodiment will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a state in which a notebook personal computer as a portable information device is being used.
As shown in FIG. 1, the notebook computer 100 includes a device main body 101 and a lid portion 102 provided on the device main body 101 so as to be freely opened and closed. For example, a liquid crystal display device 103 is provided on the lid 102, a keyboard 104 and a track pad are provided on the casing of the apparatus main body 101, and an exhaust port 105 is formed on a side wall of the casing of the apparatus main body 101. Yes. The exhaust port 105 is an opening for exhausting heat generated from the heat generating electronic component to the outside of the apparatus main body 101.

2 is an external perspective view showing a state in which components such as the keyboard 104, the track pad, and the front cover are removed from the housing of the apparatus main body 101 of the notebook personal computer 100 shown in FIG.
In the vicinity of the exhaust port 105 of the notebook computer 100 shown in FIG. 2, a heat sink is provided directly above the CPU (not shown in the figure as an example of an electronic component that generates heat). Is provided. The heat sink has a large number of plate-shaped fins 107 arranged in parallel, and each fin 107 is inclined in a direction away from the user with respect to the normal of the side wall. The heat sink 110 is configured by the heat sink and the fan motor 106.

FIG. 3 is an enlarged view of a region surrounded by a broken line A of the apparatus main body 101 of the notebook personal computer 100 shown in FIG.
The angle θ with respect to the normal line of each fin 107 shown in FIG. 3 is in the range of 10 degrees to 30 degrees, but is preferably 20 degrees.
This is because when the angle θ is 10 degrees, the effect of avoiding heat from the user's hand is low, and when the angle θ is 30 degrees, the cooling efficiency of the CPU of the notebook computer 100 is too low.

<Operation>
By using the heat dissipation device shown in FIG. 3, the direction of heat exhausted from the opening 105 of the side wall 101a of the casing of the apparatus main body 101 is the direction of the arrow P1.
By configuring the heat dissipation device 110 in this manner, the hot air from the exhaust port 105 is directed away from the user, so that the amount of hot air hitting the user's hand, particularly the left hand, is reduced.

<Comparative example>
FIG. 4 is a conceptual diagram of a normal heat dissipation device as a comparative example. The difference between the heat radiating device 110a shown in FIG. 4 and the heat radiating device 110 shown in FIG. 3 is that the angle of each fin 107a with respect to the normal line is 0 degrees, that is, perpendicular to the side wall. When the heat radiating device 110a shown in FIG. 4 is used in a notebook computer, hot air from the exhaust port 105 hits the user's hand.

<Effect>
Here, the effect will be described with reference to FIG.
For example, when the user is right-handed, the user mainly performs keyboard operations with both hands, but the left hand is used for laptop computers when waiting, performing mouse operations not shown in the figure, or inputting data. It is often located on the side wall of 100 apparatus main bodies 101. In this case, the left hand is positioned in the vicinity of the exhaust port 105, and in a general notebook personal computer, hot air from a heat generating electronic component directly hits the left hand, which may cause discomfort.
However, when the heat radiating device of the present embodiment is used, the direction of the hot air exhausted from the exhaust port 105 is directed to the direction away from the user, particularly the user's hand (the back of the device). Hits are reduced.

  The above-described embodiment shows an example of a preferred embodiment of the present invention, and the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention. is there. For example, in the above-described embodiment, the case where the exhaust port is formed on the left side wall of the apparatus main body has been described, but the same applies to the case where the exhaust port is formed on the right side.

DESCRIPTION OF SYMBOLS 100 Notebook personal computer 101 Apparatus main body 101a Side wall 102 Cover part 103 Display apparatus 104 Keyboard 105 Exhaust port 106 Fan motor 107, 107a Fin 110, 110a Radiating device

Claims (3)

In a heat dissipation device comprising a heat sink that conducts heat of an electronic component that generates heat, and a fan that blows air to the heat sink and exhausts it from the side wall of the housing of the device body.
The heat sink has a large number of plate-shaped fins arranged in parallel, and each fin is away from the user from the inside of the housing toward the outside with respect to the normal of the side wall of the housing. A heat dissipating device characterized in that it is inclined.   The heat radiating device according to claim 1, wherein an angle of each fin with respect to the normal is within a range of 10 degrees to 30 degrees.   A portable information device using the heat dissipation device according to claim 1.

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