JP2575652Y2 - Fan unit - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention comprises a plug-in mounting type fan package for accommodating an axial fan, and a mounting frame for accommodating the plug-in type fan package. Fan unit.

2. Description of the Related Art Electronic equipment has been further developed due to high performance, high speed, high density mounting, and miniaturization. High-speed, high-density mounting, and miniaturization of devices have also promoted an increase in power consumption, demanded miniaturization of power supply devices and large power supply, and furthermore, to components such as LSIs that constitute electronic circuits. The majority of the supplied power is converted to heat, which requires an increase in the cooling performance of the mounting structure.

[0003] Cooling methods for electronic devices include natural air cooling, forced air cooling using a fan, indirect liquid cooling, and direct liquid cooling.
Liquid cooling, which has a large cooling capacity, is used only for high-performance computers and special electronic devices that give priority to performance, because the maintenance is complicated and the equipment must be stopped during maintenance and inspection.

[0004] Natural air cooling is the simplest and most reliable cooling method, but usable electronic equipment is limited due to its low cooling capacity. For equipment used under conditions of non-stop for a long period of time, such as communication equipment, forced air cooling using a fan with improved reliability and maintainability is required, and its cooling capacity is required to be further increased, so that it is required to be larger, stronger, A fan unit using a high-speed fan is desired.

[0005]

2. Description of the Related Art FIGS. 3A and 3B show an example of a conventional fan unit, wherein FIG. 3A is a perspective view showing the mounting of the unit, FIG. 3B is a perspective view showing the structure of a fan package, and FIG.

As shown in FIG. 3A, the fan unit is provided with a mounting frame 59 fixed to left and right frames 91 of the apparatus housing.
And a plurality of box-shaped fan packages 19 mounted side by side with the fan package 19.

The mounting frame 59 is a box body whose front and upper and lower surfaces are substantially open, and has a fixed portion which is fixed at a predetermined position on the front edge of the frame 91 with a fixing screw 92 at a front end thereof.
A guide rail 58 for mounting and sliding the fan package 19 in a predetermined position is provided so as to span the front and rear edges, a connector 77 for plug-in connection is provided on the rear surface corresponding to the mounting position, and a device is provided on the back side of the rear surface. A connector 79 that connects to the wiring inside is installed, and the power supplied to the connector 79 is wired to each connector 77, and the alarm from the fan package received at the connector 77 is wired via the connector 79 to the device. Has been transmitted to.

As shown in FIG. 3 (b), the fan package 19 is a box-shaped base body 29 having a ventilation hole 28 formed on the lower surface and an upper surface open, and at least one or more axial fans 89.
Is installed corresponding to each ventilation hole 28 position, and the fan mounting screw
It is fastened and fixed at 27, and forced air is blown upward from the bottom in the figure, an alarm display when this axial fan 89 fails and stops, and each fuse for the power supply, etc. It is mounted on a printed board fixed on the back side. or,
The wiring 3 for the alarm signal and the power supply is wired with the space between the side wall of the base body 29 beside the axial fan 89 as a wiring area,
It is wired and connected to a connector 7 for external connection fixed to the rear side of the rear surface.

When the axial fan 89 becomes abnormal and the fuse is blown or an alarm is issued, an alarm signal is also sent to the apparatus at the same time to notify the maintenance staff and recognize the display on the front panel.
Replace only the failed fan package 19.

[0010] The performance of communication devices is internationally standardized by IEC and the like, and the size of the device housing tends to be determined to several types. That is, as shown in the cross-sectional view of FIG. 4, the outer width W of the mounting frame 59 is determined in accordance with the mounting interval of the frame 91 of the device housing. Is determined.

W = 2F + nV + (n-1) f (F; side thickness of mounting frame 57) ΔV = [W-2F- (n-1) f] / n (f; dorsal fin thickness of guide rail 58) Accordingly, the maximum mountable width M of the fan package 19 is as follows: M = V− (2t + m) (t: side thickness of the base 29, m: outer shape of the wiring 3) = [W−2F−n (f + 2t + m) + f] / n Thus, the width dimension of the axial fan 89 is regulated. Here, a gap is required for the fan package 19 to slide, but this is omitted because it is very small.

The outer shape of the axial fan 89 is determined substantially by the outer diameter of the fan. The outer diameter is not continuous, but has a blowing rate substantially proportional to the area of the outer diameter of the fan. Therefore, it is desirable to increase the diameter of the fan in order to increase the cooling performance. However, when the height occupying the frame 91 is increased, the depth of the base 29 is also restricted.

In one example, in the case where the outer width W of the mounting frame 59 is W = 622 mm, the fan package 19 is connected with n = 4 at the highest efficiency.
Axial fan 89 with M = 120 mm square x 38 mm thickness
Is used.

[0014]

[Problems to be solved by the invention] However, in order to meet the demand for higher density mounting, a box-shaped base 29
Since the axial fan 89 is mounted inside the box, only the axial fan 89 having an outer shape smaller than the size of the box can be mounted, and the side wall thickness t of the base 29 hinders the case where a necessary fan cannot be mounted. come. In addition, a wiring area for the power supply of the fan and the wiring 3 for the alarm is required, and the outer shape m of the wiring 3 is required in the horizontal width direction, which hinders an increase in diameter. And so on.

The present invention has been made in view of the above problems, and has as its object to provide a fan unit having a mounting structure in which a structure and a wiring portion do not affect an increase in the diameter of a fan.

[0016]

SUMMARY OF THE INVENTION The object of the present invention is to provide a plug-in mounting type fan package for accommodating an axial fan as shown in FIGS. And a mounting frame that is mounted and fixed to the device housing. The fan unit forcibly ventilates the inside of the device housing of the electronic device and cools the air. It is mounted and fixed, and has a width B smaller than the outer dimension A of the axial fan 8, and both side edges thereof are bent at a right angle to a side opposite to the mounting surface by a predetermined length to form an edge bent portion 22, and a rear end portion is formed. A fan package 1 having a connector 7 for plug-in connection, a substrate 2 for fixing a surface plate 25 to a front end thereof, and a structural strength maintained by fixing an axial fan 8.
Then, the fan package 1 is slid by placing the edge bending portions 22 on both sides on the guide rail 51 provided oppositely, and the connector 7 is connected to the connector 77 provided at each mounting position at the back, and plug-in mounting is performed. This is achieved by the fan unit of the present invention, which comprises the mounting frame 5 configured to partition the space by the substrate 2 in a ventilation manner. [2] The inside of one edge bent portion 22 is used as a wiring area, and the substrate 2
The wiring hole 23 is provided at a predetermined position of the wiring board 23, and the wiring 3 connected to the terminal through the wiring hole 23 and the wiring 3 in the wiring area are wrapped.
And a wiring cover 33 fixed to the fan package of the present invention. [3] Further, a notch reaching the wiring area is formed at a predetermined position of the ventilation hole 21 to form the wiring hole 23, and a vacant portion formed through the wiring 3 is partially provided in the wiring cover 33, and the bent tongue portion 34 is provided.
This is also achieved by the fan package which is closed by the above.

[0017]

The horizontal width B of the board 2 on which the axial fan 8 is mounted is described.
Is smaller than the outer width A of the axial fan 8, so that if A−B ≧ f (f: the thickness of the dorsal fin of the guide rail 51), only a small adjacent gap at the time of parallel mounting is ensured and the fan package 1 Can be mounted on the mounting frame 5. In this state, as shown in the mounting cross-sectional view of FIG. 2, only the axial fans 8 are closely arranged in the width direction, and the fan package 1 as a structure is The board 2 and the guide rails 51 of the mounting frame 5 do not affect the outer shape of the axial fan 8 at all.

As a result, the wiring 3 inside the fan package 1 has one edge bent portion 22 opposite to the mounting surface of the substrate 2.
Of the axial flow fan 8 is not affected at all, and the wiring 3 is connected to the wiring cover 33 without any influence on the mounting of the axial fan 8. It is covered and drips and moves to prevent disconnection and short circuit faults.

If the wiring hole 23 is formed in a groove shape that communicates with the ventilation hole 21, the work can be easily performed even with the wiring 3 having a connector or the like having an outer shape larger than the wiring 3 at the connection end. Furthermore, since the efficiency of the wiring hole 23 after wiring is reduced unless it is closed because of the location where the wind pressure is large, the bent tongue 34 is applied and closed with the fixing of the wiring cover 33.

In the fan package 1 of the present invention, the substrate 2 is provided with the maximum ventilation hole 21 so that the structural strength cannot be obtained by itself, and the axial flow fan 8 is mounted and fixed. The shape is also designed so that structural strength can be secured only after combining it as a part of the structure,
Thorough reduction in size and weight has been achieved.

Thus, according to the present invention, it is possible to provide a fan unit having a mounting structure in which the structure and the wiring portion do not affect the increase in the diameter of the fan.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. The same reference numerals indicate the same objects throughout the drawings. FIG. 1 shows a fan unit according to an embodiment of the present invention,
FIG. 2A is a perspective view of the mounting of the unit, FIG. 2B is a perspective view of the configuration of the fan package, and FIG. 2 is a sectional view of the mounting of the present invention.

As shown in FIG. 1B, the fan package 1 includes a substrate 2, a surface plate 25, a printed circuit board 24, and a wiring cover.
33, the wiring 3, the connector 7 and the axial fan 8; the substrate 2 is a steel plate of outer diameter 145 × 385 mm and 1.6 mm thick;
Both edges and the front edge in the longitudinal direction are bent to the same side at a right angle by 10 mm to form an edge bent portion 22, and two octagonal ventilation holes 21 having a substantially full width are formed in the mounting surface in the longitudinal direction. A fixing plate for mounting the connector 7 for external connection in a rearward direction is provided upright on a rear edge, and a front plate 25 is fixed to a metal fitting having a front surface plate 25 provided upright at a front end.

The substrate 2 has an edge bent portion 22 at a height required for strength. The edge bent portion 22 is mounted on a guide rail 51 of the mounting frame 5 and is slid and mounted. Although it has a reinforcement structure against torsion, it does not have sufficient structural strength by itself, and the axial flow fan 8 is screwed and fixed in accordance with the ventilation holes 21 to start to be united and the structural strength is increased. Guaranteed.

On the back side of the front plate 25, there is provided a warning display LE.
A printed board 24 on which D and a fuse of a power supply are mounted is fixed, and can be visually recognized and replaced from the surface. The axial fan 8 is slightly larger than that of the above-described conventional example, and has an outer shape of 150 × 172 mm and a thickness of 51 mm, which is formed of an aluminum alloy.

Thus, the mounting outer dimension A of the axial fan 8 is as follows.
= 150 mm, the width B of the substrate 2 is 145 mm, and AB
= 5 mm can be set as the maximum dorsal fin thickness f of the guide rail 51 of the mounting frame 5, and the design can be performed without any structural problems.

Further, the inner surface side of the one (front side in the figure) of the edge bending portion 22 is used as a wiring area, wiring 3 in which connection wires are bundled is wired, and ventilation holes 21 are connected to the connection terminals on the mounting surface side. The connection is made through three obliquely provided groove-shaped wiring holes 23 and connected to the axial fan 8 and the printed board 24 by connectors.

The wiring cover 33 is a bar having a length of 360 mm formed by bending an elongated steel plate having a thickness of 0.5 mm into a U-shape having a cross section of 6 × 8 mm, and having both ends extended in the center side and bent in a Z-shape. The end face is closed at the same time as the formation of the fixed portion on the substrate 2. Furthermore,
One side of the position corresponding to the wiring hole 23 is made to travel in a trapezoid and bent outward to form a bent tongue 34, and the wiring cover
33 is fixed to the board 2 by screwing, the bent tongue 34
The wiring hole 23 is closed except for the wiring 3.

As shown in FIGS. 1A and 2, the mounting frame 5 has a box shape with an open front, and a lower surface is provided with a reinforcing structure for supporting the fan package 1 at a front edge, a rear edge, and a cross beam 52 at an intermediate portion. Are fixed on the both side plates 53, on which inverted T-shaped guide rails 51, three in the illustrated example, are disposed and fixed at predetermined positions, and the rear cross beam 52 is also fixed on the rear plate 55. A connector 77 for plug-in connection is fixed to the rear plate 55 forward in accordance with the connector 7 of the fan package 1 to be mounted and mounted. A connector 79 for connection is attached. or,
The lower part of the surface plate 25 abuts against the cross beam 52 at the front edge, and the frame package 1 is screwed and fixed. On the upper surface, an upper cover 54 that is perforated is screwed and fixed to the edges of the side plates 53 and the rear plate 55.In addition, a partition plate that connects the upper and lower sides to prevent deformation such as denting or bending is provided in the center. It is.

The structure is such that the ventilation passage is not blocked as a whole. If the fan package 1 is mounted, the space is partitioned by the board 2 and the guide rail 51, and the front and rear portions are shielded by the cross beams 52. Then, forced ventilation is performed upward from below in the figure.

Thus, as a fan unit to be mounted on the same housing as the above-mentioned conventional example, with an outer width W of the mounting frame 5 of 622 mm, the mounting number n = 4 and the mounting outer shape A of the axial flow fan 8 =
M = 150 mm was realized.

[0032]

[Effect of the Invention] As a result, the height of the mounting frame was increased from 1.5 mm to 74 mm, which is 1.5 times larger than that of the conventional example, but the forced cooling air volume was more than doubled and was strengthened.

As described above, according to the fan unit of the present invention, a fan unit having a mounting structure in which the structure and the wiring portion do not affect the diameter of the fan is obtained, and the following effects are obtained. Basically, the outer diameter A of the axial flow fan 8 × the number n ≒ the mounting width W, and mounting can be performed efficiently. The lower side of the vertical direction also needs the reinforcing structure of the fan package 1, but the upper side is only the thickness of the upper cover 54 and can be mounted compactly. Since a large fan can be mounted efficiently, a large amount of high-speed air can be ventilated, and the efficiency is high as a forced air cooling device. The fan package 1 includes an axial fan 8 together with the substrate 2.
Are combined to obtain structural strength, and thorough reduction in size and weight is achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a fan unit according to an embodiment of the present invention. FIG.

FIG. 2 is a cross-sectional view of the present invention.

FIG. 3 is an example of a conventional fan unit (a) A mounting perspective view of the unit (b) A configuration perspective view of a fan package

FIG. 4 is a mounting sectional view of the fan unit.

[Explanation of symbols]

1,19 Fan package 2 Board 3
Wiring 5,59 Mounting frame 7,77,79 Connector 8,
89 Axial fan 21,28 Ventilation hole 22 Edge bend 23
Wiring hole 24 Printed board 25 Surface board 27
Fan mounting screw 29 Base 33 Wiring cover 34
Bent tongue 51,58 Guide rail 52 Cross beam 53
Side plate 54 Upper cover 55 Rear plate 91
Frame 92 fixing screw

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mamoru Sugiyama 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Akio Harada 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation In-company (72) Inventor Toru Kishimoto Nippon Telegraph and Telephone Corporation, 1-6-1, Uchisaiwai-cho, Chiyoda-ku, Tokyo (56) References JP-A-2-202098 (JP, A) Japanese Utility Model Showa 64-29895 (JP) , U) Japanese Utility Model Hei 5-25794 (JP, U) Japanese Utility Model Application Showa 61-111194 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) H05K 7/20 G06F 1/20

Claims (3)

(57) [Scope of request for utility model registration] 1. An electronic device comprising: a plug-in mounting type fan package accommodating an axial fan; a mounting frame for accommodating the fan packages in parallel, plug-in mounting the fan packages, mounting the fan packages, and fixing the fan packages to an apparatus housing. This is a fan unit that forcibly ventilates the inside of the device housing and cools the air, and has an axial fan (8) mounted and fixed in accordance with the perforated ventilation holes (21), and the external dimensions A of the axial fan (8) It has a smaller lateral width B, and both side edges are bent at right angles to the opposite side to the mounting surface by a predetermined length to form an edge bent portion (22), and a plug-in connection connector (7) is provided at the rear end. A fan package (1) which is provided and has a structural strength maintained by fixing the axial fan (8), comprising a substrate (2) to which a front plate (25) is fixed at the front end.
The fan package (1) is slid by placing the edge bending portions (22) on both sides on the guide rails (51) disposed opposite to each other, and the connector (77) provided at each mounting position at the back is connected to the connector (77). And a mounting frame (5) which is connected to the mounting frame (7) and plug-in mounted, and the space is ventilated by the substrate (2). 2. A wiring area is provided inside the one edge bent portion (22), a wiring hole (23) is provided at a predetermined position of the substrate (2), and a wiring (23) connected to a terminal through the wiring hole (23). 3. The fan package according to claim 1, further comprising: a wiring cover surrounding the wiring in the wiring area and fixing the wiring cover to the substrate. 4. 3. A wiring hole (23) is formed at a predetermined position of a ventilation hole (21) by reaching a wiring area.
3. The fan package according to claim 2, wherein a vacant space formed through the fan is closed by a bent tongue portion provided partially in the wiring cover.