JP2005123402A - Electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the most of cooling performance of a fan with a simple structure. <P>SOLUTION: Three fans 19 for ventilating a cooling air to the server unit 42 of a server device 2 are attached to both side faces 10c of an apparatus case 10 so as to be arranged at an equal distance in a direction of stacking drawers 11. Exhaust ports 16, 17 are provided in a front face cover 13 and a back face cover 14, an intake port 18 is provided in a side face cover 15, and a notch 50 is provided in a side plate 43 and a rear plate 43 of the drawer 11, so that the cooling air of the fan 19 passes the server unit 42 on each drawer 11 from both the side faces 10c of the apparatus case 10 and is exhausted from sides of the front face 10a and the back face 10b of the apparatus case 10. The twenty server units 42 can equally be cooled by the six fans 19. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electronic device in which a plurality of circuit units are housed so as to be drawable, and more particularly to an electronic device including a fan that cools each circuit unit.

  Many electronic devices use rack-type storage devices. This storage device is composed of a box-shaped device case having an open front surface, and a plurality of drawers that are detachable from the front surface of the device case and on which circuit units are mounted. As such an electronic device, for example, there is a server device that provides various services to a plurality of terminals connected via a network. This server device is unitized with a file server that allows users who use the terminal to share and use files on the network, a print server that manages printers on the network, and a mail server that sends and receives mail. It is mounted on the drawer as a server unit.

  Since this server unit is mounted with high-density electronic components such as a processing unit (CPU), a storage device, an I / O port, and a power supply unit, it becomes extremely hot when continuously used. In order to cope with this problem, in conventional electronic equipment, a fan is attached to the upper or lower part of the equipment case, or both, and an air inlet is provided at the lower part of the equipment case and an exhaust outlet is provided at the upper part to drive the fan. The inside of the apparatus is cooled by introducing outside air into the device case from the air inlet and exhausting it outside through the air outlet (see Patent Documents 1 to 3).

JP-A-11-204974 JP 2000-196273 A JP 2003-163480 A

  In the electronic devices described in Patent Documents 1 to 3, since the cooling air from the fan flows from the lower part to the upper part of the device case, the air volume distribution of the cooling air can be biased, and the cooling air is evenly distributed to each circuit unit. Absent. In order to solve this problem, these electronic devices are equipped with a wind direction plate or a wind direction adjustment unit for adjusting the direction of the cooling air, or by installing a power supply device in the dead space above the device case. The arrangement of the units has been devised, but this has led to an increase in manufacturing costs. Further, the structure of the apparatus is complicated, and the workability when performing maintenance of the apparatus is deteriorated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic apparatus that can make maximum use of the cooling performance of a fan with a simple structure.

  Another object of the present invention is to provide an electronic device that can easily perform maintenance of the apparatus.

  In order to achieve the above-mentioned object, the present invention is a box-shaped device having front, back, and both side surfaces opened, and a device case having a plurality of rows of guide members provided therein and a front cover that covers the openings. In the electronic device comprising a back cover, a side cover, a plurality of drawers guided by each guide member and withdrawn into and out of the apparatus case from the front side, and a circuit unit attached on the bottom plate of each drawer, A plurality of fans for blowing cooling air to the circuit unit are mounted on both sides of the device case, arranged at equal intervals in the stacking direction of the drawers, and the cooling air is placed on each drawer from both sides of the device case. An exhaust port is provided in the front cover and the back cover, and an intake port is provided in the side cover so that air is exhausted from the front and back sides of the device case through the circuit unit. Provided with, among the portion surrounding the bottom plate of the drawer, characterized in that a notch in a portion facing at least the fan.

  In addition, it is preferable that heat generating components are concentratedly mounted at a location near the fan of the circuit unit. The circuit unit is preferably a server unit. Moreover, it is preferable to provide a notch in a pair of side plate and rear plate except for the front plate of the drawer. Furthermore, it is preferable that L / 3 ≦ φ <L, where φ is the diameter of the fan and L is the length of the short side of the device case.

  According to the electronic device of the present invention, a plurality of fans for blowing cooling air to the circuit unit and a plurality of fans for blowing cooling air to the circuit unit are arranged on the both sides of the device case at equal intervals in the stacking direction of the drawers. Mounting and cooling air is exhausted from the front and rear covers of the equipment case and air inlets to the side cover so that the cooling air is exhausted from the front and rear sides of the equipment case through the circuit unit on each drawer from both sides of the equipment case. In addition, since the notch is provided in at least the portion facing the fan among the portions surrounding the bottom plate of the drawer, the cooling performance of the fan can be utilized to the maximum with a simple structure. In addition, since the circuit unit having a function common to each drawer is integrated and mounted, and the fan is attached at a position opposite to the direction in which the drawer is taken in and out, the apparatus can be easily maintained.

  In FIG. 1, a server device 2 to which the present invention is applied includes an aluminum device case 10 and an aluminum drawer 11. The device case 10 accommodates a total of 22 drawers 11 in two rows and 11 stages. The device case 10 has a box shape in which openings 12a to 12d are formed in the front surface 10a, the back surface 10b, the both side surfaces 10c, and the upper surface 10d, respectively, and the front cover 13, the back cover 14, and the side cover 15 are provided. It can be attached with screws. Exhaust ports 16 and 17 are formed in the front cover 13 and the back cover 14. Further, the side cover 15 is formed with an intake port 18.

  A total of six fans 19, three on each side, are mounted side by side in the stacking direction of the drawers 11 at equal intervals on both side surfaces 10 c of the device case 10. The fan 19 introduces outside air from the air inlet 18 of the side cover 15 into the device case 10 and cools the server unit 42 (see FIG. 4) on the drawer 11. The cooling air that has cooled the server unit 42 is discharged to the outside of the device case 10 through the exhaust ports 16 and 17 of the front cover 13 and the back cover 14. Although illustration is omitted, the front cover 13 is provided with an opening in consideration of access to the power button 46 of the server unit 42. Further, in order to increase the exhaust amount of the cooling air of the fan 19 in the front direction, the number of the exhaust ports 16 of the front cover 13 is made larger than that of the back cover 14 to increase the opening area by the exhaust ports 16.

  The bottom surface 10e of the device case 10 is provided with four casters 20 used when the server device 2 is transported and four legs 21 used during installation. The leg 21 has a function capable of finely adjusting the height of the device case 10. Although not shown, a hub for providing various services to a plurality of terminals connected to the network is installed inside the device case 10.

  In FIG. 2, a plurality of frames 30 are provided inside the device case 10. A total of 44 L-shaped rails 31 for accommodating the drawers 11 are attached to the frame 30 in two rows and 11 stages. The rail 31 functions as a guide member when the drawer 11 is taken in and out of the device case 10 from the front surface 10a side, and is formed so that the drawers 11 are stored in close contact with each other. If it does in this way, the server apparatus 2 can be made compact and cooling by the fan 19 mentioned later can be performed efficiently.

  As shown in FIG. 3, two auxiliary frames 32 for attaching the fan 19 are provided on both side surfaces 10 c of the device case 10. The fan 19 has its front face directed toward the opening 12 c and is fixed by screwing a mounting plate 33 to the auxiliary frame 32. The fan 19 starts operation with the operation of the server unit 42 (see FIG. 4).

Here, φ is the diameter of the fan 19, and L is the length of the short side of both side surfaces 10 c of the device case 10 to which the fan 19 is attached.
L / 3 ≦ φ <L
It is preferable to select the fan 19 so that, for example, a general ventilation fan (model UL-30A, φ = 30 cm) manufactured by Hitachi Home & Life Solutions Co., Ltd. is used.

  As shown in FIG. 4, the drawer 11 is mounted with a server unit 42 including a circuit board 40 on which a power supply device and an arithmetic processing unit are integrally mounted, a hard disk drive 41, and the like. Heat generating components such as a power supply device are concentrated and mounted on a portion 40a of the circuit board 40 close to the fan 19 (left side in the figure in the left column and right side in the right column).

  The server units 42 of the drawers 11 are connected to each other by a hub. The server unit 42 includes a file server that allows users using the terminal to share and use files on the network, a print server that manages printers on the network, a mail server that transmits and receives mail, and the like. Operates individually for each function. As the server unit 42, servers having the same function may be mounted and operate in conjunction with each other.

  The drawer 11 is formed with a pair of side plates 43 and a rear plate 44, a bottom plate 45 to which the server unit 42 is attached, a power button 46, an indicator lamp 47, a connector insertion port 48 for exposing various connectors to the outside, and the like. And a front plate 49. A cutout 50 is provided in the side plate 43 and the rear plate 44. With this cutout 50, the cooling air from the fan 19 is directly supplied to the server unit 42. The drawer 11 is supported by the rail 31 with a part of the side plate 43 and the bottom plate 45, and can be inserted and removed from the front surface 10 a side of the device case 10.

  When power is supplied to the server device 2 and the power button 46 of each drawer 11 is pressed, the server unit 42 is activated. The fan 19 is started to operate when power is supplied separately from the server unit 42. Thus, outside air is introduced into the device case 10 from the air inlet 18 of the side cover 15, and cooling air is supplied to the server unit 42 on each drawer 11. The supplied cooling air exchanges heat with the server unit 42 to cool the heat generated in the server unit 42. At this time, the portion 40a close to the fan 19 of the circuit board 40 on which the heat generating components are concentratedly mounted is intensively cooled. After cooling the server unit 42, the cooling air is discharged to the outside of the device case 10 through the exhaust ports 16 and 17 of the front cover 13 and the back cover 14.

  Since the cutout 50 is provided in the side plate 43 and the rear plate 44 of the drawer 11, the air permeability is good and the workability during maintenance can be improved. Further, since the drawers 11 are stored in close contact with each other by the rails 31, the 22 server units 42 can be evenly cooled by the 6 fans 19, and the cooling capacity of the fans 19 is utilized to the maximum. can do. In addition, since the server unit 42 having a common function is mounted on each drawer 11 and the fan 19 is attached at a position opposite to the direction in which the drawer 11 is put in and out, the server apparatus 2 can be easily maintained. be able to.

  Furthermore, since a fan with a large diameter is used, a sufficient cooling effect is exhibited. For this reason, it can be suppressed to a level that does not bother the noise caused by the driving of the fan (measured from a distance of 1 m from the air inlet 18 of the side cover 15), and a dedicated space is installed like a conventional server device. It is not necessary to secure a place, and it can be installed side by side with other OA devices such as a facsimile and a copy machine.

  The place where the notch 50 is provided in the drawer 11 is not particularly limited as long as it is provided at least in a portion facing the fan 19 (in the above embodiment, the side plate 43 on the fan 19 side) except for the front plate 49. It is not a thing. Further, as shown in FIG. 5, the side plate 43 and the rear plate 44 may be eliminated, and a drawer 60 constituted only by the bottom plate 45 and the front plate 49 may be used. With such a configuration, the device cost can be further reduced.

  In the above embodiment, the server apparatus has been described as an electronic device. However, the present invention is also applied to an electronic device in which a storage, a router, an amplifier, a power supply, a measuring device, a communication device, and the like are mounted on a drawer. It is possible.

It is a front external appearance perspective view of the server apparatus to which this invention is applied. It is a front view of an apparatus case. It is a side view of an apparatus case. It is a general-view perspective view which shows the structure of a server unit. It is a figure which shows another embodiment of drawer | drawer.

Explanation of symbols

2 Server device 10 Device case 10a Front surface 10b Rear surface 10c Side surface 11, 60 Drawer 12a-12d Opening 13 Front cover 14 Rear cover 15 Side cover 16, 17 Exhaust port 18 Inlet port 19 Fan 30 Frame 31 Rail 32 Auxiliary frame 33 Mounting plate 40 Circuit board 41 Hard disk drive 42 Server unit 50 Notch

Claims (5)

A device case having a front, back, and both sides opened in a box shape, in which two rows of guide members are provided inside, and a front cover, a back cover, and a side cover that cover the openings, and each guide member In an electronic device consisting of a plurality of drawers guided into and out of the device case from the front side and a circuit unit attached on the bottom plate of each drawer,
A plurality of fans that blow cooling air to the circuit unit are mounted on both side surfaces of the device case, arranged side by side at equal intervals in the stacking direction of the drawers,
An exhaust port is provided in the front cover and the back cover so that the cooling air is exhausted from the front and back sides of the device case through the circuit unit on each drawer from both sides of the device case. In addition to providing an air inlet in the cover,
An electronic apparatus comprising a cutout provided in at least a portion of the drawer surrounding the bottom plate facing the fan.   The electronic apparatus according to claim 1, wherein heat generating components are concentrated and mounted at a location near the fan of the circuit unit.   The electronic device according to claim 1, wherein the circuit unit is a server unit.   4. The electronic apparatus according to claim 1, wherein a cutout is provided in the pair of side plates and the rear plate except for the front plate of the drawer. When the diameter of the fan is φ and the length of the short side of the device case is L,
L / 3 ≦ φ <L
The electronic apparatus according to claim 1, wherein the electronic apparatus is an electronic apparatus.

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