JPH09274791A - Magnetic disk device and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cooling efficiency and to limit a temperature increase by providing a flow control means for separating cooling air flowing through a magnetic disk drive from that flowing through a control circuit part. SOLUTION: As a flow control means for cooling air 12a and 12b, an air guide plate 11 for separating the cooling air 12a flowing through a magnetic disk drive 1 mounted on one surface of a base board 3 from the cooling air 12b flowing through a control circuit part 2. A blowing means 4 consists of an axial flow fan 4, is provided with a peculiar frame 6b to constitute a fan unit 5 and is attached to a back board 9 detachably. By separating the passages for the cooling air 12a and 12b flowing through the magnetic disk drive 1 and the control circuit 2 from each other, cooling efficiency is improved and temperature rising is suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device and an electronic device.

[0002]

2. Description of the Related Art As an example of the structure of a conventional board-mounted magnetic disk device, as disclosed in Japanese Patent Laid-Open No. 2-263382, a magnetic disk device main body and A magnetic disk device equipped with a peripheral circuit, and a substrate to which a plurality of magnetic disk enclosures can be attached, as described in JP-A-4-57274, so that the storage capacity can be easily increased, and There is a magnetic disk device for the purpose of reducing the size and weight of the device. However, in these conventional techniques, sufficient consideration has not been given to the substrate cooling structure in which a plurality of magnetic disk drives and the control unit of the magnetic disk drives are mounted on the substrate.

[0003]

The heat generation amount of the magnetic disk drive is decreasing due to downsizing of the magnetic disk drive due to downsizing, etc. However, in order to ensure reliability, heat generation is higher than that of the magnetic disk drive. It is important to cool the control circuit including a large amount. In particular, when the heat generated in the control circuit unit is larger than that in the magnetic disk drive, it is necessary to devise such that the heat generated in the control circuit unit does not adversely affect the magnetic disk drive.

An object of the present invention is to provide a magnetic disk device in which a plurality of magnetic disk drives, a control circuit section for controlling the magnetic disk drives, a blowing means, a power source thereof, and the like are housed at a high density, and particularly, a board-mounted magnetic disk device Therefore, it is to provide a highly reliable case cooling structure. further,
The cooling housing structure and the cooling system are intended to simplify the structure, improve productivity, and reduce costs.

[0005]

In order to achieve the above object, in the magnetic disk device of the present invention, as a first method, the magnetic disk drive, the control circuit section, etc. are mounted on a substrate on which the magnetic field is applied. The flow control means for the cooling air flowing through the disk drive and the cooling air flowing through the control circuit portion is provided. As a second method, the magnetic disk drive was separately mounted on one surface of the substrate, and the control circuit unit was separately mounted on the other surface of the substrate. As a third method, a plurality of the substrates are housed in a box body having a plurality of openings to form one disc box. As a fourth method, a plurality of fan-equipped disk boxes provided with air blowing means are arranged in parallel or in series to form one disk unit.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows a magnetic disk drive 1, a substrate on which a control circuit unit 2 for controlling the magnetic disk drive 1 is mounted on one side or both sides, an air blowing unit 4 for cooling the magnetic disk drive 1 and the control circuit unit 2, and their components. It is a perspective view of one disk box 17 with a fan comprised by the box frame 6a hold | maintained. A plurality of boards (8 in the figure) are mounted in the fan-equipped disk box 17 including the boards 3 having the flow control means for the cooling air 12a flowing to the magnetic disk drive 1 and the cooling air 12b flowing to the control circuit unit 2. Further, a backboard 9 having a connector 7 for electrically connecting the magnetic disk drive 1 and the board 3 on which the control circuit unit 2 is mounted and the blowing means 4 and the like, and the connector provided on the rear portion of the board 3 and the blowing means 4 and the like. 7 and the connector 7 can be easily connected by a plug-in method. Here, the blower means 4 shows an axial fan 4 as an example, but the axial fan 4 has its own frame 6b.
Are provided to constitute the fan unit 5, and the blower unit 4 is attached to and detached from the backboard 9 in the form of the fan unit 5. The axial fan 4 is a suction type, and a box frame 6
The lower opening is the intake port 20, the upper opening is the exhaust port 2
It is one. Here, the box frame 6a, the disk box with fan 17, and the frame 6b of the fan unit 5 may be made of the same material. For example, an aluminum plate or a steel plate is used. The arrow indicates the flow direction of the cooling air 12.

2 to 7 show the substrate 3 shown in FIG.
It is an embodiment concerning the 1st method of the present invention. 2 to 3 show an air guide plate 11 for separating the cooling air 12 flowing through the magnetic disk drive 1 mounted on one surface of the substrate 3 from the control circuit unit 2 as a flow control means for the cooling air 12a, 12b. It is an example of a structure provided with. First, FIG.
The control circuit unit 2 is mounted on the central portion of the substrate 3 and the magnetic disk drives 1 are mounted on both ends thereof, and the two air guide plates 11 are arranged in parallel along the flow direction of the cooling air 12a, 12b. Here, the magnetic disk drive 1 may be mounted at the center of the substrate 3 and the control circuit unit 2 may be mounted at both ends.
By separating the flow paths of the cooling air 12a, 12b flowing through the magnetic disk drive 1 and the control circuit unit 2, the cooling air 12a, 12b can be separately and separately supplied to the magnetic disk drive 1 and the control circuit unit 2. Therefore, the cooling air 12a, 12b can be made to flow according to the heat generation amount of each magnetic disk drive 1 and control circuit unit 2. Further, since the air guide plate 11 is oriented in the flow direction of the cooling air 12a, 12b, the warmed air that has cooled the magnetic disk drive 1 and the control circuit unit 2 can be efficiently cooled without being mixed.

Next, in FIG. 3, the magnetic disk drive 1 and the control circuit section 2 are separately divided into the left and right sides of the substrate 3, and an air guide plate 11 is provided between the magnetic disk drive 1 and the control circuit section 2.
This is an example of a structure provided with one sheet. With such a structure, only one air guide plate 11 is required. In FIGS. 2 and 3, the shape of the air guide plate 11 is not limited to this. For example, the material may be plastic or the like, and the attachment method may be a method of inserting into the substrate 3.

FIGS. 4 to 7 show an air volume control plate for controlling the air volume of the cooling air flowing through the magnetic disk drive 1 and the control circuit unit 2 mounted on one surface of the substrate 3 as the flow control means of the cooling air 12. 13 is a structural example in which 13 is provided. First, in FIG. 4, the air guide plate 11 of FIG. 2 is bent on the upstream side of the cooling air 12, and the area of the cooling air 12b flowing to the control circuit unit 2 is wider than that of the magnetic disk drive 1. Is. By this method, the cooling air 1 can be more smoothly and locally applied to the control circuit unit 2 which generates high heat.
2b can be made to flow and the temperature rise of the control circuit part 2 can be suppressed. The upstream shape of the air volume control plate 13 (air guide plate 11) is not limited to the linearly spread structure, but may be a curved structure. Figure 5 shows cooling air 1
2a, 12b has a structure in which an air volume control plate 13 having a rectangular opening 14 is provided at the upstream inflow portion, and cooling air 12a,
The control circuit section 2 is wider than the magnetic disk drive 1 in the opening through which 12b flows. As a result, there is an advantage that the air volume of the cooling air 12b flowing through the control circuit unit 2 increases and the temperature rise can be suppressed. The shape of the opening 14 of the air volume control plate 13 need not be limited to a rectangular shape, but may be a triangle,
A diamond shape or a parallelogram shape may be used. FIG. 6 shows a structure in which the rectangular opening 14 of FIG. 5 has a circular or elliptical shape 15. The cooling effect is similar to that of FIG. 5 and 6, the number and cross-sectional area of the openings 14 and 15 of the air volume control plate 13 need not be limited to this, and may be determined according to the heat generation amount of the control circuit unit 2. FIG. 7 shows a structure in which only the control circuit section 2 is surrounded by a duct 28 in order to further locally flow the cooling air 12b to the control circuit section 2 in which the amount of heat generation increases.
The cooling air 12a, 12b that does not contribute to cooling does not flow, and the cooling air 12a, 12b is effectively used.

FIG. 8 shows an embodiment relating to the second method of the present invention. FIG. 8 shows a structure in which only the magnetic disk drive 1 is mounted on one surface of the substrate 3, and the control circuit unit 2 is mounted on the other back surface of the substrate 3, and the magnetic disk drive 1 and the control circuit unit 2 are mounted on the substrate 3. This is an embodiment in which both sides are separately mounted. 2 to 8, the number of the magnetic disk drive 1 and the control circuit unit 2 mounted on the substrate 3 need not be limited to this. Further, each array on the substrate 3 may be a staggered array or the like along the flow direction of the cooling air 12a, 12b.

9 to 14 show an embodiment relating to the third method of the present invention. FIG. 9 shows a plurality of substrates 3 on which a plurality of magnetic disk drives 1 and a control circuit unit 2 are mounted.
This is an example of a fanless disk box 8 having no fan due to the box frame 6 and the backboard 9. The substrates 3 are arranged in an orderly manner. Two openings 29 are provided above and below. FIG. 10 shows an example in which the fan-equipped disk box 17 is configured by providing the fan unit 5 as the air blowing means 4 in one of the openings of the fanless disk box 8 of FIG. The axial fan 4, which is the blower 4, is of a suction type, and the lower opening of the fanless disk box 8 is an inlet 20, and the upper opening is an exhaust 21. FIG.
1 is an example of an embodiment in which the substrate 3 of FIG. 8 is mounted in a disk box 17 with a fan, and the substrates 3 are alternately inverted so that the magnetic disk drives 1 on the substrate 3 and the control circuit units 2 face each other. FIG. It is a dedicated flow path for each of the cooling air 12a and 12b flowing through each magnetic disk drive 1 and control circuit section 2. By providing the air guide plate 11 and the air volume control plate 13 in this structure, the cooling air 12a and 12b can be controlled and flowed according to the heat generation amount of the magnetic disk drive 1 and the control circuit unit 2. FIG. 12 is an example of the disk box 17 with a fan in FIG. 10 in which two blowers 4 are provided. When one blower 4 fails, the other blower 4 suppresses the temperature rise of the magnetic disk drive 1 and the control circuit unit 2 to a minimum. For this reason, the reliability is secured as compared with the disk box 17 in which the blower unit 4 is one. Here, the number of the blowing means 4 may be two or more. Further, the rotation speed of the other blowing means 4 is increased to increase the cooling air 1
You may make it the structure which controls the air volume of 2a, 12b. FIG.
3 is the fanless disk box 8a, 8b of FIG.
This is a structure in which the openings 29 are provided above and below the fanless disk box 8 by stacking layers. The fanless disk boxes 8 may be stacked in two or more stages. FIG. 14 shows a structure in which the fanless disk boxes 8 of FIG.
0 and the opening that is the exhaust port 21 communicate with each other, and the fan unit 5 that is a blowing unit is laminated on one of the openings.

FIGS. 15 to 22 show an embodiment relating to the fourth method of the present invention. FIG. 15 corresponds to FIG. 10 or FIG.
This is an example in which four disk boxes 17 with a fan are arranged side by side in the lateral direction to form one disk unit 16.
Further, four or more fan-equipped disk boxes 17 may be arranged side by side in the lateral direction. 16 shows an example in which the disk unit 16 is constructed by stacking the fan-equipped disk boxes 17 of FIG. 10 or 11 in two stages. The fan-equipped disk boxes 17 may also be laminated in two or more stages. FIG. 17 shows a disk unit 16 in which four fan-equipped disk boxes 17 having the structure shown in FIG. 14 are arranged side by side in the lateral direction, and a driving power supply 10 for operating the magnetic disk drive 1 and the control circuit section 2 is also provided at the lateral left end. Is an example of. FIG. 18 shows the structure of FIG. 17, in which the driving power source 10 is moved from the left end portion to the central portion, and the driving power source 10 can be installed at any position. FIG.
1 is different from FIGS. 1, 10 to 12 and FIGS. 14 to 18 in that the fan unit 5 is provided in the lower opening, the axial fan 4 is of the pressure feeding type, and the lower opening is the intake port. Two
0, the opening of the upper part is the exhaust port 21, and the flow direction of the cooling air 12 is from the lower part to the upper part. 1, FIG. 10 to FIG. 12, and FIG. 14 to FIG. 18, the blower means 4 may be a pressure feed type as shown in FIG. 19, and also in FIG. 19, the blower means 4 may be a suction type. In each figure, the flow direction of the cooling air 12 is only reversed. Regarding the flow direction of the cooling air 12 when cooling the equipment, if the temperature increase of the cooling air 12 is large (when the cooling heat amount is large), it is more efficient to flow from the lower part to the upper part, but the temperature increase of the cooling air 12 is small. In case (when the amount of cooling heat is small), it is allowed to flow from the upper part to the lower part. In FIG. 20, the air blower 4 is attached to both the upper and lower openings 29 which are the intake port 20 and the exhaust port 21. One of the axial fans 4 is a suction type, and the other is a pressure feeding type. The upper air blowing means 4 may be either a suction type or a pressure feeding type.

The embodiment of FIG. 21 shows the structure of the magnetic disk device 27. First, in the lower right disk unit 16a, the cooling air 12 flows in from the intake portion 30a on the bottom surface of the device housing 26 and is supplied into the disk unit 16a by the air partition plate 18a at the bottom. Then, the cooling air 12 flows in the lower disk unit 16a, cools the magnetic disk drive 1 and the control circuit unit 2, and then passes through the fan unit 5a. The unit 16a is bent toward the back surface and reaches the cooling channel duct 19 (clearance). After that, the cooling air 12 merges with the cooling air 12 that has cooled the lower left disk unit 16b, rises in the cooling flow path duct 19 (clearance), and is discharged from the device exhaust portion 31 provided in the upper part of the device housing 26. Exhausted to the surroundings. The lower left disk unit 16b has the same cooling method.
On the other hand, the cooling air 12 flowing through the disk unit 16c on the upper right side is supplied from the air intake plate 30b at the center of the device housing 26 into the disk unit 16c by the air partition plate 18b at the center. After passing through the upper fan unit 5b, it is exhausted to the surroundings from the exhaust unit 31. The same cooling method is applied to the upper left disk unit 16d. The air partition plate 18 described with reference to FIG. 21 is generally made of the same material as the device housing 26 and the box body frame 6 of the fanless disk box 8, and an aluminum plate, a steel plate, or the like is used. Also, the shape and inclination angle are shown in FIG.
It is not necessary to limit to. In addition to the magnetic disk device 27, the embodiment shown in FIG.
A plurality of board units 2 mounted with a plurality of (electronic parts)
2 is a cross-sectional view of an electronic device 23 (or an electronic device) that accommodates 2 (for example, a board that controls data input and output, a board that performs processing of a line system, etc.). Here, the storage unit of the substrate unit 22 is referred to as an electronic computer unit 25, and the cooling of the substrate unit 22 stored in the electronic calculation unit 25 is the same as the cooling method of the disk unit 16 of the magnetic disk device 27 described above. The electronic device 23 (or the electronic device) in which the electronic computer unit 25 and the magnetic disk device 27 are housed in one housing is, for example, a high-end server machine or the like.

[0014]

According to the present invention, in a magnetic disk device in which a plurality of magnetic disk drives and a board on which a control circuit unit and the like are mounted are housed in a single housing with high density, the magnetic disk drive and the control circuit unit are efficiently operated. It can be cooled well and the temperature rise can be suppressed. Further, it is possible to provide a cooling enclosure structure and a cooling system that can easily replace and maintain the magnetic disk drive, the control circuit unit, and the air blowing unit in a minimum unit even when another magnetic disk drive is in operation. Further, in the cooling housing structure and the cooling system of the present invention, the structure is simplified by using a plurality of disk boxes having the same shape, so that the productivity can be improved and the cost can be reduced. As described above, it is possible to provide a low-cost, highly reliable, high-performance magnetic disk device and an electronic device or an electronic device using the same.

[Brief description of drawings]

FIG. 1 is a perspective view of a disk box with a fan.

FIG. 2 is a perspective view of a substrate provided with an air guide plate.

FIG. 3 is a perspective view of a substrate provided with one air guide plate of FIG.

FIG. 4 is a perspective view of a substrate provided with an air volume control plate.

FIG. 5 is a perspective view of a substrate provided with an air volume control plate having a rectangular opening.

FIG. 6 is a perspective view of a substrate provided with an air volume control plate having a circular or elliptical opening.

FIG. 7 is a perspective view of a substrate provided with a box plate air volume control plate.

FIG. 8 is a perspective view of a board on which a magnetic disk drive and a control circuit unit are mounted on both sides.

FIG. 9 is a perspective view of a disk box without a fan.

FIG. 10 is a perspective view of a disk box with a fan.

11 is a cross-sectional view showing a mounted state of a disk unit with a fan that accommodates a plurality of substrates shown in FIG.

FIG. 12 is a perspective view of mounting two fan units in a fanless disk box.

FIG. 13 is a perspective view in which two fanless disk boxes are stacked.

FIG. 14 is a perspective view of a fan-equipped disk box in which two fanless disk boxes are stacked and a fan unit is mounted in one of the openings.

FIG. 15 is a perspective view of a disk unit in which disk boxes with fans are juxtaposed in four rows.

FIG. 16 is a perspective view of a disk unit in which two fan-equipped disk boxes are stacked.

17 is a perspective view of a disk unit in which the fan-equipped disk boxes of FIG. 14 are mounted in two stages.

FIG. 18 is a perspective view of a disk unit in which the driving power source of FIG. 17 is provided in the central portion.

FIG. 19 is an explanatory diagram of a pressure-feeding fan.

FIG. 20 is an explanatory diagram of a suction type fan and a pressure feeding type fan.

FIG. 21 is a sectional view of a magnetic disk device housing.

FIG. 22 is a cross-sectional view of an electronic device.

[Explanation of symbols]

1 ... Magnetic disk drive, 2 ... Control circuit part, 3 ... Board, 4 ... Axial fan, 5 ... Fan unit, 6 ... Frame, 7 ... Connector, 8 ... Fanless disk box,
9 ... Backboard, 11 ... Air guide plate, 12 ... Cooling air, 17 ... Disk box with fan, 20 ... Intake port,
21 ... Exhaust port.

Claims (10)

[Claims] 1. A magnetic disk having a plurality of magnetic disk drives, a control circuit section for the magnetic disk drive, and a blowing means in an apparatus casing, wherein the magnetic disk drive and the control circuit section are mounted on the same substrate. The magnetic disk device according to claim 1, further comprising flow control means for separating cooling air flowing through the magnetic disk drive from cooling air flowing through the control circuit unit. 2. An air guide which stands upright on a substrate so that said flow control means separates the cooling air flowing through said magnetic disk drive and the cooling air flowing through said control circuit portion along the cooling air flow direction. The magnetic disk device according to claim 1, which is a plate. 3. As the flow control means, an air volume control plate having an opening is provided in a cooling air inflow portion of a substrate, and the cross-sectional area of the opening through which the cooling air flows is wider in the control circuit portion than in the magnetic disk drive. The magnetic disk drive according to claim 1 or 2, wherein 4. The magnetic disk drive is mounted on one surface of the substrate, and the control circuit section of the magnetic disk drive is separately mounted on the other surface of the substrate. The magnetic disk device according to 1. 5. The magnetic disk drive according to claim 1, 2, 3 or 4, wherein a plurality of the substrates are housed in a box body having a plurality of openings to form a fanless disk box. 6. A disk box with a fan, wherein a plurality of the substrates are accommodated in a box body having a plurality of openings, and at least one of the openings is provided with a blower to constitute a disk box with a fan. 3. The magnetic disk device according to 3 or 4. 7. A fan-equipped disk box is constructed by stacking a plurality of fan-less disk boxes in series and providing a blowing means in at least one of the openings of the fanless disk box. The magnetic disk device according to 3, 4, or 5. 8. A disk unit is constructed by arranging the fan-equipped disk boxes in a plurality of rows in parallel, or in two stages in series, or by arranging a plurality of disks in parallel and in series to form one disk unit. 7. The magnetic disk device according to 7. 9. One of the disk units is arranged on the front surface of the apparatus housing and the other is arranged on the rear surface of the apparatus housing, and also serves as a cooling air passage duct between the rear surfaces of the two disk units. 5. A space is provided, said disk units are stacked in a plurality of stages, and air partition plates for supplying cooling air to be supplied to each disk unit independently of each other are provided between the disk units. , 5, 6, 7
Alternatively, the magnetic disk device according to item 8. 10. The method of claim 1, 2, 3, 4, 5, 6, 7, 8
Alternatively, a space other than a storage area for the disk box or the disk unit is provided in the magnetic disk device housing described in 9, and an electronic calculation section including a board unit on which semiconductor components such as CPU and LSI are mounted is stored in the space. An electronic device that forms a single housing.