JPH11175197A - Heat radiating device for electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the heat radiating efficiency of a second electronic equipment to be used while being combined with a first electronic unit. SOLUTION: An intake opening 21 is provided at the position corresponding to the opening part 13 of a cabinet 19 constituting the first electronic equipment 9 in which a heat radiating fan 14 is incorporated in a cabinet 12 and which is provided with the opening part 13 and the second electronic equipment 17 in which a heat radiating part 20 is incorporated. The heat of the second electronic equipment 17 is radiated with air discharge from the opening part 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as a personal computer, and more particularly to a heat radiating device.

[0002]

2. Description of the Related Art Electronic devices called personal computers have become widespread, and among such personal computers, there is a portable computer called a notebook computer. Notebook-type personal computers are required to be reduced in size and weight because they are used by being carried.

A notebook personal computer is
As the signal processing speeds up and the functions are expanded, the amount of heat generated from inside increases, and the number of connection terminals for performing signal input / output operations with external devices tends to increase. Also, a personal computer in which a speaker that emits a signal read out from a disk is installed has been commercialized.

However, as personal computers have become smaller, it has become difficult to provide the above-described connection terminals and speakers in the main body. Recently, electronic devices called extension devices that are used by connecting to personal computers have become commercially available. Has been FIG. 2 shows a state in which a personal computer is used in combination with an extension device.

In FIG. 1, reference numeral 1 denotes a personal computer, and a main body 3 provided with a keyboard 2 and the like.
And a lid portion 5 in which a display device 4 such as a liquid crystal is incorporated. Reference numeral 6 denotes an expansion device having an input / output connection terminal connected to an input / output connection terminal provided on the rear surface of the main body 3 constituting the personal computer 1, and has speakers 7 and 8 incorporated therein. An amplifier circuit for amplifying audio signals applied to the speakers 7 and 8, a control circuit for controlling input / output operations of signals, and the like are incorporated.

[0006]

A notebook personal computer tends to use an integrated circuit which generates a large amount of heat with an increase in signal processing capability, and the system control circuit itself runs away due to the influence of heat. There are many problems. In order to solve such a problem, a product on which a fan for heat dissipation is incorporated in a main body is sold.

Also, in the above-described expansion device, the amount of heat generated has increased due to the increase in output of an amplifier circuit for amplifying an audio signal and the improvement in the control capability of a control circuit for controlling the input / output operation of signals. In such an expansion apparatus, there is a method of dissipating heat generated from the inside, in which a fan is provided in the expansion apparatus. However, there is a problem that the cost is increased.

An object of the present invention is to provide a heat radiating device for electronic equipment which solves the above problem.

[0009]

SUMMARY OF THE INVENTION According to the present invention, there is provided a first electronic device having a fan for heat dissipation incorporated in a cabinet and having an opening for ventilation, and a combination with the first electronic device. A cabinet is provided with an air intake opening at a position corresponding to an opening of a first electronic device of a second electronic device in which a heat-generating component is incorporated inside the cabinet. The second electronic device is configured to radiate heat by air discharged from the opening.

[0010]

FIG. 1 is a sectional view of a main part showing an embodiment of a heat radiator of the present invention. In FIG. 1, reference numeral 9 denotes a first electronic device such as a personal computer, in which a heat generating component 11 such as an integrated circuit is incorporated in a printed wiring board 10 provided therein. Reference numeral 12 denotes a cabinet which constitutes a main body of the first electronic device 9, and an opening 13 for ventilation is formed on a rear surface 12A. 14 is a cabinet 12
The fan is rotated by a motor 16 fixed to a fixed substrate 15 provided therein, and is disposed at a position facing the opening 13. In such a configuration, when the fan 14 rotates, the air inside the cabinet 12 is discharged to the outside through the opening 13, and the heat generated from the heat-generating component 11 due to the discharge of the air is reduced. Will be performed.

Reference numeral 17 denotes a second electronic device which is used in combination with the first electronic device 9, and is configured to be connected to each other by an input / output connection terminal (not shown).
Reference numeral 18 denotes a printed wiring board provided inside a cabinet 19 constituting the second electronic device 17, and incorporates a heat-generating component 20 such as an integrated circuit. Reference numeral 21 denotes an intake opening formed at a position corresponding to the opening 13 provided in the first electronic device 9 when the first electronic device 9 and the second electronic device 17 are combined. The rear surface 19A of the cabinet 19, that is, the exhaust opening formed on the surface opposite to the surface on which the intake opening 21 is formed.

Reference numeral 23 denotes a cavity connecting the intake opening 21 and the exhaust opening 22. As shown in the figure, the area of the opening on the exhaust side is smaller than the area of the opening on the intake side. A slope 23A for smoothing the air flow is provided. Such a cavity 23 is disposed above a place where the heat-generating component 20 and the like are stored, and a plurality of ventilation holes 24 are formed in a bottom wall 23B thereof. A plurality of ventilation holes 25 are formed on the lower surface of the cabinet 19, that is, below the place where the heat-generating components 20 and the like are stored.

The present invention is configured as described above. Next, the heat radiation operation will be described. When the first electronic device 9 is used, the fan 14 is rotated by the rotation driving operation of the electric motor 16. When the fan 14 rotates, air inside the cabinet 12 is discharged to the outside through the opening 13 by the rotation force. As a result, the heat generated from the heat-generating components 11 and the like is released to the outside of the cabinet 12 together with the air, so that the temperature rise of the first electronic device 9 can be suppressed. Therefore, the problem that the system control circuit incorporated in the first electronic device 9 runs away can be solved.

The heat radiation operation when the first electronic device 9 is used alone is performed as described above. Next, a case where the second electronic device 17 is used in combination will be described. The state shown in FIG. 1 corresponds to the first electronic device 9 and the second electronic device 17.
This shows a use state in which the opening 13 provided in the first electronic device 9 and the intake opening 21 provided in the second electronic device 17 are closely opposed to each other. become.

In this state, when the first electronic device 9 and the second electronic device 17 are activated, the circuits and the like incorporated in each device are activated and are incorporated in the first electronic device 9. The fan 14 is driven to rotate by the electric motor 16. When the fan 14 rotates, air is discharged to the outside from the opening 13 as described above. The discharged air is blown into the intake opening 21 provided in the second electronic device 17. become.

The air blown into the intake opening 21 is guided to the exhaust opening 22 through the cavity 23 and is exhausted from the exhaust opening 22 to the outside. In such a case, since the shape of the cavity 23 is formed such that the area on the exhaust side is smaller than the area of the opening on the suction side, the air flow, that is, the speed of the air flow is discharged from the input side. The side is faster.

As a result of such an air flow flowing through the inside of the hollow portion 23, the air in the place where the heat-generating component 20 is housed becomes
The air is sucked into the cavity 23 through the plurality of ventilation holes 24 formed in 3B. In addition, external air is sucked through the plurality of ventilation holes 25 formed on the lower surface of the cabinet 19, and after the sucked air is sucked into the hollow portion 23 through the ventilation holes 24, the air is exhausted. It is discharged to the outside through the opening 22. Therefore, heat generated from the heat-generating components 20 and the like is released to the outside of the cabinet 19 together with the air.
The temperature rise of the second electronic device 17 can be suppressed. Therefore, it is possible to prevent the temperature of the control circuit and the amplification circuit incorporated in the second electronic device 17 from rising, and to perform a normal operation.

[0018]

According to the heat radiating device of the present invention, the heat radiating operation of the second electronic device used in combination with the first electronic device in which the radiating fan is built in the cabinet is performed by the first radiating device.
Since the process is performed by using the air discharged from the electronic device, it is not necessary to incorporate a radiating fan into the second electronic device, thereby suppressing an increase in cost.

According to the present invention, there is provided a cavity for connecting an intake opening and an exhaust opening formed in a cabinet constituting the second electronic apparatus, and an opening on an intake side for forming the cavity. Since the area of the opening on the exhaust side is made smaller than the area of the part, the speed of the airflow flowing in the cavity gradually increases, and the heat radiation efficiency of the second electronic device can be increased.

Further, since the cavity through which the air discharged from the first electronic device flows is arranged above the heat-generating component incorporated in the second electronic device, the heat radiation effect can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of a heat radiator of the present invention.

FIG. 2 is a perspective view illustrating a state in which a personal computer is used in combination with an extension device.

[Explanation of symbols]

 9 First electronic device 13 Opening 14 Fan 17 Second electronic device 21 Intake opening 22 Exhaust opening 23 Cavity

Claims (5)

[Claims] A first fan having a fan for heat dissipation incorporated in a cabinet and having an opening for ventilation.
And a second electronic device that is used in combination with the first electronic device and has a heat-generating component incorporated in the cabinet, and the first electronic device of the cabinet that constitutes the second electronic device. An air intake opening is provided at a position corresponding to an opening of a device, and air discharged from the opening of the first electronic device radiates heat of the second electronic device. apparatus. 2. An exhaust opening is formed on a surface opposite to a surface on which an intake opening of a cabinet constituting the second electronic device is provided, and the intake opening and the exhaust opening are formed. 2. The heat dissipation device according to claim 1, wherein a cavity to be connected is formed, and an area of the opening on the exhaust side is made smaller than an area of the opening on the suction side forming the cavity. 3. The heat radiating device according to claim 2, wherein the cavity is disposed above the heat generating component incorporated in the second electronic device. 4. The heat radiating device according to claim 3, wherein a ventilation port is formed in a bottom wall constituting the hollow portion. 5. The heat radiating device according to claim 4, wherein a ventilation port is formed in a cabinet located below the heat generating component.