JPH06195155A - Air cooling unit for housing - Google Patents

Abstract

PURPOSE:To intensively cool any arbitrary part inside a housing for protecting electronic parts whose heat generation is large and possibility of destruction caused by heat is high. CONSTITUTION:In the inside of the housing, this unit is composed of a cooling fan 25 at a local heat generating part, an air chamber 28 to be the flow passage of air in the entire housing, and a ventilation fan 29 to exhaust the heat of the entire housing. Thus, the localized heat generation inside the housing for a computer or the like is intensively cooled. Further, air is exhausted from the rear face part of the housing, the housing is constituted so that an operator does not care of ventilation noise, and the place to arrange the housing is not limited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for protecting electronic parts which are locally high in heat generation and are vulnerable to heat in the case of computers, printers, amplifiers for audio equipment and the like. The present invention relates to a housing air cooling unit including a plurality of cooling fans.

[0002]

2. Description of the Related Art FIG. 5 is an internal configuration diagram of a conventional electronic computer (hereinafter, abbreviated as computer). 1 is a floppy disk drive, 2 is a hard disk drive, 3
Is a board on which electronic components such as CPU and memory are mounted, 4
Is a power supply for supplying electricity to the floppy disk drive 1, the hard disk drive 2, and the substrate 3, and 5 is a cooling fan for discharging the heat inside the computer case to the outside of the case. 6 is a chassis that houses the floppy disk drive 1, hard disk drive 2, substrate 3, power supply 4, and cooling fan 5, 7 is a cover that seals the chassis 6, and 8 is according to the differences in product specifications and user needs. It is an extension board that can be installed.

When the computer is turned on when the computer is used, the computer starts and at the same time, the cooling fan 5 also starts to rotate. Then, as the computer is used, the memory, CPU, etc. on the substrate 3 generate heat and the temperature inside the computer case rises. In addition, as the computer operator starts to use the floppy disk drive 1 and the hard disk drive 2, and the number of accesses to the floppy disk drive 1 and the hard disk drive 2 increases, the temperature inside the housing rapidly rises.

In order to suppress the temperature rise inside the casing, the heated air inside the casing is forcedly exhausted outside the casing by the cooling fan 5. The cooling fan 5 normally rotates at a constant rotation speed and discharges the heated air inside the housing to the outside of the housing. As a mounting position of the cooling fan 5, the cooling fan 5 is generally mounted at a portion where the amount of heat generated in the housing is the largest, for example, at a power supply enclosure or at a peripheral portion of the power supply 4.

Further, since one cooling fan cannot keep the temperature inside the housing below the standard value, some cooling fans are attached. In this case, one cooling fan may be attached to the power supply 4 and the other cooling fan may be arranged around the hard disk drive 2.

[0006]

However, in the cooling fan 5 attached to the conventional computer, the amplifier of the audio equipment, or the like as described above, when there is an electric component which locally generates heat in the housing, the generated heat is generated. If there is a distance between the components and the cooling fan 5, sufficient cooling cannot be performed with the flow velocity of the air generated by the ordinary cooling fan in the housing. as a result,
The heat-generating electronic component causes thermal destruction, and a device such as a computer cannot operate normally. In addition, the cooling fan may be attached to the side surface of the housing in order to respond to the heat generation distribution in the housing. At this time, when the housing is installed adjacent to the wall surface of the room as shown in FIG. 6, the intake air from the upper surface of the housing is not sufficient and the exhaust air from the lower portion of the housing collides with the wall surface. Since it is repelled in the direction of the cooling fan 5, there arises a problem that it cannot be performed efficiently. Conversely, when the exhaust port is directed toward the operator, noise caused by the exhaust may be heard directly by the operator, or the exhausted air may be blown to the operator, causing discomfort to the operator. Becomes

The present invention has solved the above problems and concentratedly cools electric parts having a high heat generation amount, and at the same time cools the entire case, and an operator air-cooling unit which can be comfortably used by an operator. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is provided with a cooling fan mounted inside a housing such as an amplifier of a computer or an audio device so that parts having particularly high heat generation are adjacent to each other. The flow of air generated by the fan is passed through an air chamber provided inside the housing. In order to forcibly exhaust the air that has passed through the air chamber to the outside of the housing from the rear surface of the housing that is least affected by the exhaust noise and does not cause the exhaust efficiency to decrease due to the obstacle at the installation location. A cooling fan different from the above cooling fan is provided to efficiently cool the inside of the housing. Further, the fan attached to the rear surface portion of the housing has a function of exhausting not only the air used for local heat dissipation but also the entire housing.

[0009]

According to the present invention, with the above-described structure, the parts having a high heat generation amount locally in the housing are intensively air-cooled, and an air chamber serving as an air flow path is provided in the center of the housing. It is used as an air flow path for guiding the air used for intensive cooling of and for the entire housing. Further, the air that has flowed into the air chamber is smoothly discharged to the outside of the housing by the fan attached to the rear surface of the housing.

[0010]

1 is a block diagram showing the internal construction of a computer according to an embodiment of the present invention, and FIG.
It shows in (b).

First, the internal structure of FIG. 1A will be described.
20 is a floppy disk drive, 21 is a hard disk drive, 22 is a board on which electronic components such as a CPU and a memory are mounted, and 23 is a floppy disk drive 2
0, a hard disk drive 21, a power supply for supplying electricity to the board 22, 24 is an additional board to be installed according to the difference in product specifications or the user's need, and 25 is a concentrated area where the amount of heat radiation is locally high. Cooling fan for cooling, 26 is floppy disk drive 20, hard disk drive 2
1, a chassis that accommodates the board 22, the power supply 23, and the cooling fan 25; 27 is a cover that seals the chassis 26; 28 is air that has intensively cooled or air that has cooled the entire housing. Air chamber to guide the surface, 29
Is an exhaust fan for discharging the air guided to the air chamber 28 from the rear surface of the housing, and 30 is a slit hole formed in the cover 27. FIG. 1B is an external view of the computer described above.

Next, the flow of air inside the housing will be described with reference to FIG. In this embodiment, there is an electronic component that locally generates heat in the front part of the housing, and a cooling fan 25 is arranged below the electronic component in order to effectively cool this electronic component. Here, the cooling fan 25 is fixed to the sheet metal of the central portion which constitutes the chassis 26.

As shown in FIG. 2, by rotating the cooling fan 25, a fast air flow is locally generated around the electronic component having a high heat generation amount, and the slit hole 3 of the cover 27 is generated.
The air sucked from 0 flows into the air chamber 28.

FIG. 3 is a diagram showing the flow of air that passes through the air chamber 28 in the housing and is exhausted to the outside of the housing. The air flowing into the air chamber 28 is discharged to the outside of the housing by an exhaust fan 29 attached to the rear surface of the housing. At this time, as the exhaust fan 29 rotates, a force for sucking air is also generated in the rear surface of the housing, and the air flowing in from the slit hole 30 formed in the cover 27 at the rear of the housing passes between the substrates, The heat generated from the board is discharged to the outside of the housing. Further, in the case of the present embodiment, the exhaust fan 29 is installed so that the heat in the power supply 23 is also discharged to the outside of the housing, thereby realizing the miniaturization of the housing.

When using a plurality of cooling fans, it is necessary to adjust the air flow rate. In this embodiment, the air volume of the cooling fan 25 needs to be smaller than that of the exhaust fan 29. This is because when the air volume of the cooling fan 25 is larger than that of the exhaust fan 29, air is trapped in the air chamber 28, the air flow in the housing is stopped, and the heat radiation effect is reduced.

FIG. 4 is a diagram showing a state where the air flow is blocked when the width of the air chamber 28 is narrow.
As shown in FIG. 4, when the width of the air chamber 28 is narrow, the air blown out from the cooling fan 25 collides with the wall surface of the discharge portion to generate a backflow of air, and the flow velocity of the air in the portion where the heat generation amount is high decreases. However, the heat dissipation effect decreases. In the present invention, the air discharged by the cooling fan 25 has a suction force on the rear surface because the exhaust fan 29 is arranged linearly with the air chamber 28, and the width of the air chamber 28 generally needs to be 60 mm or more. It is said that the width of the air chamber 28 can be set to 20 mm and the size of the housing can be reduced by setting the two fan air volumes as described above.

[0017]

According to the present invention, when a local heat generating portion is present inside the housing of a computer, an audio device, etc., a cooling fan is installed in the vicinity of the heat generating electric parts to perform intensive cooling. be able to. Further, by arranging the two cooling fans and the air chamber linearly in the central portion of the housing, it is possible to make the air flow in the entire housing uniform and to narrow the space of the air chamber. Miniaturization can be realized. Furthermore, since no air is exhausted from the side surface of the housing, it is possible to eliminate restrictions on the place where the housing is arranged.

[Brief description of drawings]

FIG. 1A is an internal configuration diagram of a computer according to an embodiment of the present invention. FIG. 1B is an external view of a computer according to an embodiment of the present invention.

FIG. 2 is a diagram showing an air flow in a computer housing according to an embodiment of the present invention.

FIG. 3 is a diagram showing a flow of air exhausted to the outside of the housing through an air chamber in the housing according to an embodiment of the present invention.

FIG. 4 is a diagram showing a state where the air flow is blocked when the width of the air chamber is narrow.

FIG. 5 is an internal configuration diagram of a conventional computer

FIG. 6 is a diagram showing a state in which a conventional computer is installed adjacent to a wall surface in a room.

[Explanation of symbols]

 1,20 Floppy disk drive 2,21 Hard disk drive 3,22 Board 4,23 Power supply 5,25 Cooling fan 6,26 Chassis 7,27 Cover 24 Expansion board 28 Air chamber 29 Exhaust fan 30 Slit hole

Claims (2)

[Claims] 1. A control system having a central processing unit (hereinafter referred to as a CPU), a memory, a hard disk drive, a floppy disk drive, and a heat-generating electric component of a power source, which is a local part for cooling the heat-generating electric component. The exhaust fan has a cooling fan, an air chamber for passing the air sent by the local cooling fan into the housing, and an exhaust fan for exhausting the air passing through the air chamber to the outside of the housing. An air-cooling unit for a casing, characterized in that the air flow rate is larger than the cooling air flow rate of the local cooling fan. 2. The local cooling fan, the air chamber, and the exhaust fan are linearly arranged, and the air sent by the local cooling fan is sucked by the exhaust fan. 1. The housing air-cooling unit according to 1.