JPH0276299A - Pcb rack device - Google Patents

Abstract

PURPOSE:To enable a PCB to be effectively cooled by providing PCB guide rails and air ports on both ends of a plurality of PCB arranged vertically to a PCB rack while providing thermosensitive constantly closed type shutters on the exhaust sides of the air ports. CONSTITUTION:A casing is provided with intake ports 5 and exhausts by a fan, a PCB rack device is provided with guide rails 7 on the upper and lower parts while air ports 8 are provided on the side of the guide rails 7. The upper air ports 8 of the PCB rack device are provided with constantly closed type shutters 10 thermosensitively opening and shuttering provided corresponding to the electronic components 9 mounted on the PCB 4. Accordingly, heating can be sensitively caught, further, in the initial operation state of the apparatus, ventilation to a place having no PCB 4 of the PCB rack device is gone. Thereby, the electronic components 9 of the PCB 4 can be effectively cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a PCB rack device used for electronic equipment and the like.

(Prior Art) FIGS. 3 and 4 show a conventional rack device for electronic equipment. In the figure, 11 is a floppy disk device, 12 is an optical disk device, and 13 is a hard disk device, which are fixed in a housing 14. 15 is a floppy disk device 11. Optical disk device 12. These are a plurality of PCBs that control the hard disk device 13 and other external electronic equipment (not shown), and are detachably attached to a motherboard 17 provided in a rack 16 via a connector 18. 19 drives the floppy disk device 11 and optical disk device [12, hard disk device 13;
This is the power supply for control from CB 15. 20 is a floppy disk device 11. Optical disk device 12. A front fan 21 is used to air-cool the hard disk drive 13 and the power supply 19, and a rear fan 21 is used to air-cool the PCB 15.At the bottom of the 0gL body 14, there is an intake port 22.
, an exhaust port 23 is provided at the top, and the rack 16 has a P
Guide rail 24 that supports CB 15 at the top and bottom
A rack intake port 25 and a rack exhaust port 26 are provided. 27 is a back panel that is attached to the PCB 15 and also serves as reinforcement for the PCB 15. Reference numeral 28 is a partition plate for preventing the exhaust air from the single-side fan 20 from entering the PCB side.

Next, the operation will be explained. When the device is energized, the front fan 20 and the rear fan 21 rotate, suck air from the intake port 22 provided at the bottom of the housing 14, and fill the floppy disk 1l.
fill, optical disk device 12. Hard disk drive device 1
3. and "ton rX19" are cooled by the air flow from the front fan 20.
1, the air is cooled by the flow of air that enters from the rack intake port 25, and is discharged to the outside of the machine through the rack exhaust port 26.

(Problems to be Solved by the Invention) The conventional electronic equipment described above incorporates various devices and provides various functions, but all functions may be unnecessary depending on customer requests.

At this time, as shown in FIG. 4, the number of PCBs 15 in the PCB rack 16 decreases, and empty space occurs in the PCB rank 16. When ventilation is performed in such a state, a large amount of air flows toward the empty space side where there is less ventilation resistance, and the ventilation to the PCB 15 is reduced. For this reason, P
There was a drawback that the CB 15 could not be cooled.

SUMMARY OF THE INVENTION An object of the present invention is to provide a PCB rack apparatus that eliminates the conventional drawbacks and can cool PCBs even when there is an empty space for PCBs in the PCB rack.

(Means for Solving the Problems) A PCB rack device of the present invention includes a casing provided with a plurality of intake ports and an exhaust port and in which an intake/exhaust fan is installed; The system is equipped with a rack in which PCB guide rails and air vents are alternately provided, and a shutter that opens and closes the air vents by sensing heat.

(Function) The present invention has the following effects due to the above configuration. In other words, when the device is energized, the temperature of the PCB rises, so the shutter of the air port where the PCB is present senses the temperature rise and changes from closed to open, while the air port without the PCB remains closed. . For this reason, the air entering the PCB rack enters the PCB part where the shutter is open,
The PCB can be effectively cooled.

(Example) An example of the present invention will be described based on FIGS. 1 and 2. FIG. 1 is a longitudinal sectional view of an electronic device including a PCB rack device of the present invention. In the figure, 1 is a PCB rack device provided in the housing 2, and 3 is a cooling fan for the PCB 4 provided on the upper part of the housing 2. The housing 2 is provided with an intake port 5 and an exhaust port 6 by a fan 3. The PCB rack device 1 is provided with guide rails 7 at the top and bottom, and an air vent 8 is provided next to the guide rails 7.

The upper air port 8 of the PCB rack device 1 is provided with a normally closed shutter 10 that opens and closes by sensing heat and is provided in correspondence with an electronic component 9 attached to the PCB 4.

Next, the operation will be explained. In FIG. 2, the electronic components 9 of the PCB 4 that are energized to the device generate heat, and this heat operates the normally closed shutter 10 provided above, changing the state from the closed state shown by the two-dot chain line to the solid line shown in FIG. In the open state, the PCB
The upper air opening 8 of the rack device 1 is opened. Therefore, the fan 3 takes in air from the intake port 5 provided in the housing 2, and the air is P
The electronic components 9 of the PCB 4 are cooled through the lower air port 8 of the CB rack device 1 and then discharged to the outside of the machine.

As described above, according to the above embodiment, when the electronic component 9 of the PCB 4 generates heat, the normally closed shutter 10 opens.
An air passage can be formed in the part where 4 exists, and no air passage can be formed in other parts. Therefore, the electronic components 9 of the PCB 4 can be effectively cooled.

In addition, since the normally closed shutter 10 is provided at the top of the PCB rack device 1, heat generation can be detected sensitively.
Because it is a normally closed type, P
There is also no ventilation to areas of the CB rack device 1 where the PCB 4 is not present. Further, since the normally closed shutter 10 is disposed on the leeward side, it is always present in the warm air region, and it is possible to prevent the shutter from erroneously closing while the device is in operation due to temperature changes.

(Effects of the Invention) According to the present invention, an intake/exhaust fan and a PCB rack are provided in a housing provided with a plurality of intake ports and an exhaust port, and the PCB
PCBs are installed at both ends of multiple PCBs arranged vertically in the rack.
It is equipped with a guide rail and an air vent, and a heat-sensing normally closed jacket is installed on the exhaust side of the air vent, which has the advantage of allowing ventilation inside the PCB rack device to be carried out only in the area where the PCBs are present. be. By placing the shutter above the PCB and making it a normally closed type, it is possible to respond sensitively to heat generation, and by placing it on the leeward side, it is possible to eliminate the effects of temperature changes during operation. The practical effects are great.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an electronic device including a PCB rack device according to an embodiment of the present invention, Fig. 2 is a sectional view showing the PCB storage state of the same device, and Fig. 3 is a sectional view of a conventional PCB rack device. FIG. 4 is a cross-sectional view showing the PCB storage state of the V device. 1...PCB rack device, 2...Casing, 3
...Fan, 4...PCB, 5...Intake port, 6...Exhaust port, 7...Guide rail,
8...Air port, 9...Electronic component, 10...
Normally closed shutter. Figure 2

Claims (1)

[Claims] a housing provided with a plurality of intake ports and exhaust ports and an intake/exhaust fan installed therein; a rack installed inside the housing and provided with a plurality of PCB guide rails and air ports alternately; A PCB rack device characterized by having a shutter at its mouth that opens and closes by sensing heat.