JP2000174473A - Enclosure structure of printed-circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow air to flow in a case with fixed conditions, and to effectively perform heat countermeasures with the minimum power consumption by forming a ventilation hole onto a plurality of printed-circuit boards, and by connecting section space parts being formed by the adjacent printed-circuit broads with the ventilation hole. SOLUTION: At the inside of a case 1, printed-circuit broads 2, 3, 4, and 5 are accommodated in a vertical row while being separated with specific width. In the case 1, among the printed-circuit broads 1, 2, 3, 4, and 5, section space parts 6, 7, 8, and 9 are formed. Also, on the printed-circuit boards 1, 2, 3, 4, and 5, ventilation holes 10, 11, 12, and 13 are formed while they oppose one another. Furthermore, a fan 14 of exhaust is installed on one side wall 1a of the opposing side-wall parts 1a and 1b of the case 1 while the fan 14 opposes the ventilation holes 10, 11, 12, and 13, and a suction hole 15 composed by a plurality of grooves is formed on the other side wall 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a housing structure for accommodating a plurality of printed circuit boards.

[0002]

2. Description of the Related Art In this type of housing structure, a plurality of printed circuit boards are accommodated in a housing, so that a large number of partitioned space portions are formed by the printed circuit boards. , The temperature will rise.

In view of such a point, conventionally, a large number of intake or exhaust fans are installed in a housing according to the number of partitioned space portions formed, and a large number of fans are installed in a housing correspondingly. Provide ventilation holes to reduce exhaust resistance or air resistance,
The intention was to eliminate the difference from the temperature around the printed circuit board.

[0004]

However, in the conventional housing structure, installing a large number of exhaust fans increases the cost by that much, and preparing a large number of ventilation holes makes it difficult to provide a large number of ventilation holes. Since many ventilation holes are prepared at the time of manufacture, many molds are required, and the cost increases accordingly.

In view of the foregoing, the present invention provides a printed circuit board housing structure in which air is circulated in the housing under a constant condition, the power consumption is minimized, and an effective heat countermeasure is taken. The purpose is.

[0006]

In order to achieve the above-mentioned object, the present invention provides a method for forming a ventilation hole in a plurality of printed circuit boards so that divided spaces formed by adjacent printed circuit boards are separated from each other. Communication was established by the ventilation holes.

As a result, the air in the space defined between the printed circuit boards is circulated through the ventilation holes, so that the air in the housing can be circulated. Under the same conditions, and effective thermal measures can be taken with minimal power consumption.

[0008]

According to the present invention, there is provided a housing structure for a printed circuit board for accommodating a plurality of printed circuit boards in a housing, wherein a ventilation hole is formed in each of the printed circuit boards.
It is characterized in that these ventilation holes are located at positions facing each other.

As a result, the air in the space defined between the printed circuit boards flows through the ventilation holes, so that the air in the housing can be circulated. Under the same conditions, and effective thermal measures can be taken with minimal power consumption. According to a second aspect of the present invention, an exhaust fan is installed on one side wall of the housing so as to face a ventilation hole formed in a printed circuit board, and an intake hole of the exhaust fan is provided in the housing. It is characterized in that it is formed on another side wall facing one side wall.

As a result, the air taken in from the intake hole is sucked through the ventilation hole by the exhaust fan and exhausted to the outside of the housing. This is performed between the exhaust fan and the intake hole at the position where the air flows, so that the air in the entire partitioned space between the printed circuit boards efficiently flows.

According to a third aspect of the present invention, there is provided a printed circuit board housing structure for accommodating a plurality of printed boards in a housing, wherein a ventilation hole is formed in each of the printed boards, and the printed boards adjacent to each other are formed. It is characterized in that the ventilation holes formed in the substrate are located at positions where they do not face each other.

As a result, the air in the space defined between the printed circuit boards flows through the ventilation holes that do not face each other, and the temperature inside the housing is reduced. Then, by arranging the ventilation holes alternately in the vertical direction on the adjacent printed circuit boards, high-temperature air existing on the upper side of the partitioned space between the printed circuit boards is sucked into the ventilation holes existing on the lower side. By mixing with the low-temperature air on the lower side of the compartment space, the air temperature of the entire compartment space can be lowered.

Accordingly, the air in the space defined between the printed circuit boards can be circulated through the ventilation holes, and the air in the housing can be circulated.
The air flow in the entire housing is performed under the same conditions, and effective heat countermeasures can be taken with minimum power consumption.

According to a fourth aspect of the present invention, a ventilation hole is formed in each of a plurality of printed boards, and the plurality of printed boards are faced to each other and housed in a housing.
A partition space is formed in the housing between the adjacent printed circuit boards, and an intake hole for exhaust air communicating with the partition space is formed in the housing.

As a result, since the intake holes are present in each of the partition spaces, when the exhaust fan is operated, fresh outside air can be drawn into each of the partition spaces from each of the intake holes, and Air can be effectively distributed.

Therefore, the air in the space defined between the printed circuit boards can be circulated through the ventilation holes, and the air in the housing can be circulated.
The air flow in the entire housing is performed under the same conditions, and effective heat countermeasures can be taken with minimum power consumption.

According to a fifth aspect of the present invention, the shape of the intake hole communicating with the partition space formed in the housing between the printed circuit boards is such that the shape of the air intake hole that is farther from the exhaust fan provided in the housing is as follows. It is characterized in that it is formed larger than the closer one.

As a result, in the partitioned space far from the exhaust fan, the exhaust force of the exhaust fan is the weakest, but the intake hole facing this portion is formed larger than that near the exhaust fan. Therefore, the air can be evenly circulated in each partition space.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of the present invention with a partial cross section.

In FIG. 1, printed circuit boards 2, 3, 4 and 5 are arranged and accommodated in a housing 1 in a column at a predetermined distance from each other. 5, in the housing 1 between the partition spaces 6, 7,
8 and 9 are formed.

The printed circuit boards 1, 2, 3, 4, and 5 are provided with ventilation holes 10, 11, 1, 1 so as to face each other.
2 and 13 are formed through.

Further, the opposite side wall portions 1 of the housing 1 are opposed to the ventilation holes 10, 11, 12 and 13.
a, 1b, an exhaust fan 14 is provided on one side wall 1a.
Are provided, and the other side wall 1b is formed with an intake hole 15 formed by a plurality of grooves.

In the case of such a configuration, the exhaust fan 1
4, the exhaust fan 14 and the intake hole 15 communicate with each other through the ventilation holes 10, 11, 12, and 13 to form a linear air duct and introduce outside air from the intake hole 15. , An air flow indicated by a dotted arrow is formed, and the air is exhausted from the exhaust fan 14, and the entire interior of the partition spaces 6, 7, 8, and 9 is air-circulated under a certain condition by only one exhaust fan 14. be able to.

Therefore, unlike the related art, it is not necessary to provide an exhaust fan for each partitioned space, and only by using one exhaust fan 14, the air can flow through the entire housing 1 under the same conditions. Effective heat measures can be taken with minimal power consumption.

FIG. 2 is a perspective view showing a second embodiment of the present invention in partial cross section.

According to FIG. 2, a method of installing ventilation holes 10, 11, 12, 13 provided in printed circuit boards 2, 3, 4, and 5 is different from that of the first embodiment. That is, of the printed boards 2, 3, 4 and 5, the printed boards 2 and 4 include:
The ventilation holes 10 and 1 are positioned so as to be located relatively in front of the housing 1.
2 are respectively formed on the printed circuit boards 3 and 5 so that the ventilation holes 1 are positioned relatively behind the housing 1.
1 and 13 are respectively formed.

An exhaust fan 14 is provided at a position opposite to the ventilation hole 10 of the printed circuit board 2.
3 is provided below.

As a result of this configuration, the air in the partitioned spaces 6, 7, 8 and 9 between the printed boards 2, 3, 4 and 5 allows the air holes 10 in the adjacent printed boards 2 and the Since the ventilation holes 11, the ventilation holes 11 of the printed circuit board 3 and the ventilation holes 12 of the printed circuit board 4, and the ventilation holes 12 of the printed circuit board 4 and the ventilation holes 13 of the printed circuit board 5 do not face each other, the printed circuit board 2 3, the partition space 7 between the printed boards 3 and 4, the partition space 8 between the printed boards 4 and 5, and the printed board 5 and the side wall 1 b of the housing 1. The existing high-temperature air is sucked into the ventilation hole existing on the lower side, and is mixed with the low-temperature air on the lower side of the partitioned space, thereby lowering the air temperature of the entire partitioned space.

Therefore, unlike the related art, there is no need to provide an exhaust fan for each partition space, and the air flow of the entire housing 1 is performed under the same conditions by using only one exhaust fan 14. Effective heat measures can be taken with minimal power consumption.

FIG. 3 is a perspective view partially showing a third embodiment of the present invention.

According to FIG. 3, ventilation holes 10, 11, 12, and 13 provided in printed circuit boards 2, 3, 4 and 5 are formed so as to face each other as in the first embodiment, and So as to face 10, 11, 12, 13
An exhaust fan 14 is provided on one of the side walls 1a and 1b of the housing 1 facing each other.

However, air intake holes 15a, 15b, 15c and 15d are formed in the front wall or the rear wall 1c of the housing 1 so as to face the partition spaces 6, 7, 8 and 9. These intake holes 15a, 15b, 15c and 15
The value of d is larger when the exhaust gas is far from the fan near the fan 14.

As a result of this configuration, the partition space 6,
7, 8 and 9, the exhaust holes 14a, 15b, 15c and 15d are respectively provided, so that the exhaust fan 14
Is operated, fresh outside air can be sucked into each of the compartment spaces 6, 7, 8 and 9 from each of the intake holes 15a, 15b, 15c and 15d, and the inside of the compartment spaces 6, 7, 8 and 9 can be taken. Ventilation can be performed effectively.

Further, the shape of the intake holes 15a, 15b, 15c and 15d depends on the shape of the exhaust fan 14 provided in the housing 1.
Is formed larger than the nearer one, and the partitioned space 15d farthest from the exhaust fan 14 has the weakest exhaust force by the exhaust fan 14,
The intake hole 15d facing this portion is the intake hole 15c closer to the exhaust fan 14, and the intake hole 15c is closer to the exhaust fan 14 or the intake hole 15b.
5b is formed to be larger than the intake hole 15a closer to the exhaust fan 14, so that the ventilation in each partitioned space can be exhausted uniformly.

Therefore, unlike the related art, it is not necessary to provide an exhaust fan for each partition space, and the air flow of the entire housing 1 is performed under the same conditions only by using one exhaust fan 14. Effective heat measures can be taken with minimal power consumption.

[0036]

As described above, according to the present invention, a ventilation hole is formed in each of a plurality of printed circuit boards, and the divided spaces formed by adjacent printed circuit boards are communicated with each other by the ventilation holes. The air in the space defined between the printed circuit boards can be circulated through the ventilation holes, and the air in the housing can be circulated. Even with a single exhaust fan, the air in the entire housing can be circulated. Perform under the same conditions and take effective thermal measures with minimal power consumption.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention in a partially sectional view.

FIG. 2 is a perspective view showing a second embodiment of the present invention with a partial cross section.

FIG. 3 is a perspective view showing the first embodiment of the present invention in a partial cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2,3,4,5 Printed circuit board 6,7,8,9 Division space part 10,11,12,13 Ventilation hole 14 Exhaust fan 15,15a, 15b, 15c, 15d Intake hole

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shokichi Takahashi 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture F-term in Matsushita Communication Industrial Co., Ltd. (reference) 5E322 BA01 BA05 BB03

Claims (5)

[Claims] 1. A printed circuit board housing structure for accommodating a plurality of printed circuit boards in a housing, wherein a ventilation hole is formed in each of the printed circuit boards, and the ventilation holes are located at positions facing each other. A housing structure for a printed circuit board characterized by the following. 2. An exhaust fan is provided on one side wall of the housing so as to face a ventilation hole formed in the printed circuit board.
2. The printed circuit board casing structure according to claim 1, wherein an intake hole of the exhaust fan is formed on another side wall of the casing opposite to the one side wall. 3. A printed circuit board housing structure for accommodating a plurality of printed boards in a housing, wherein a ventilation hole is formed in each of the printed boards, and the ventilation holes formed in the adjacent printed boards are mutually connected. A housing structure for a printed circuit board, which is located at a position not opposed to the printed circuit board. 4. A plurality of printed circuit boards each having a ventilation hole formed therein, said plurality of printed circuit boards facing each other and housed in a housing, and a partition space in said housing between said adjacent printed circuit boards. Form a part,
A printed board casing structure, wherein an intake hole of an exhaust fan communicating with the partition space is formed in the casing. 5. The shape of an intake hole of an exhaust fan communicating with a partitioned space formed in a housing between printed circuit boards is larger in a portion farther from an exhaust fan provided in the housing than in a portion closer to the fan. The printed circuit board casing structure according to claim 5, wherein the printed circuit board casing structure is formed large.