JP2002176281A - Cooling fan unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling fan unit wherein the reverse flow of the air is prevented even if one of the cooling fans stops. SOLUTION: The cooling fan unit comprises a plurality of cooling fans 11 and an air shield plate 12 so provided as to individually open/close a air discharge opening of the cooling fan 11. Here, the air shield plate 12 corresponding to the cooling fan 11 which stopped its rotation is closed among the plurality of cooling fans 11 while the shield plate 12 corresponding to the cooling fan 11 that continues to rotate is opened, to prevent the reverse flow of the air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling fan unit for electronic equipment used for cooling infrastructure electronic equipment that requires long-term operation and peripheral equipment thereof.

[0002]

2. Description of the Related Art A conventional cooling fan for electronic equipment and peripheral equipment thereof has a structure as shown in FIG. A plurality of cooling fans 4 are provided on the back panel 3 of the housing 2 in which the electronic device 1 is stored. A finger guard 5 is attached to the discharge port of the cooling fan 4 for safety.

[0003]

However, in the above-mentioned conventional cooling fan unit, if one of the plurality of cooling fans is stopped due to a failure or the like, it is necessary to suppress a rise in the temperature of the internal electronic equipment. The air flows backward from the outlet of the cooling fan to exhaust the air inside the device,
Dust, dust, etc. flow into the device. Also, the backflow of some air disturbs the intake and exhaust flow paths of other cooling fans,
In some cases, the temperature inside the electronic device may be increased, which may affect electronic components.

SUMMARY OF THE INVENTION In view of the above, the present invention, when a part of a plurality of cooling fans is stopped, closes a discharge port of the stopped cooling fan with a wind shield plate to prevent a reverse flow of air and to perform another cooling operation. By rotating a fan to exhaust air from the electronic device, the temperature of the electronic device is prevented from rising.

[0005]

SUMMARY OF THE INVENTION The present invention provides a cooling system comprising a plurality of cooling fans and a wind shield provided to open and close the ventilation outlets of each cooling fan. A fan unit, wherein a wind shield corresponding to a cooling fan that has stopped rotating among a plurality of cooling fans is closed, and a wind shield corresponding to a cooling fan that continues to rotate is opened. It is.

According to the present invention, even when a part of the cooling fan is stopped due to a failure or the like, air is prevented from flowing backward from the discharge port, thereby preventing dust and the like from entering the inside of the electronic device. In addition, it is possible to prevent the intake and exhaust paths of the other cooling fans from being disturbed, thereby preventing the temperature inside the electronic device from rising.

The wind shield of the present invention is divided into a plurality of sheets.

According to the present invention, the wind shield can be reduced in size and weight, and can be used for a small cooling fan with weak wind force.

In the present invention, the bearing for supporting the wind shield plate is formed integrally with the frame of the cooling fan.

With such a configuration, the efficiency of the operation of mounting the fan device can be improved.

Further, in the present invention, a fixture for mounting the rotating shaft of the wind shield plate is fixed to the frame of the cooling fan.

With this configuration, the cooling fan and the bearing are integrated into one structure, and the efficiency of the operation of mounting the fan device can be improved.

According to the present invention, the bearing supporting the wind shield plate is fixed together by screws for fixing the cooling fan.

With such a configuration, the work of replacing the wind shield plate can be performed efficiently.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an operation state of a cooling fan unit according to an embodiment of the present invention, FIG. 2 is a perspective view showing a state where a part of the cooling fan unit is stopped, and FIG. FIG. 4 is a perspective view showing a wind shield plate attachment portion, and FIG. 4 is a side view of a main part showing a state where the wind shield plate of the cooling fan unit is opened.

Here, the cooling fan unit 10 is composed of a plurality of cooling fans 11 and a plurality of wind shields 12, and the wind shield 12 is arranged near the discharge port of the cooling fan 11 so as to be openable and closable. As shown in FIG. 4 and the like, the bearing 14 is fixed to the rear panel 15 and rotatably supports the rotating shaft 13 fixed to the wind shield 12.

In this embodiment, the wind shield plate 12 has a square shape, and the rotating shaft 13 attached near the upper side is connected to the rear panel 1.
5 is supported by a bearing 14 attached to the housing 5 so as to be openable and closable. That is, when the cooling fan rotates, the wind shield plates 12 attached to the discharge ports of the cooling fan 11 float by receiving the wind pressure from the discharge side. Now, as shown in FIG. 1, when all the cooling fans 11 rotate, all the wind shields 12 are opened, and the intake A is performed from inside the electronic device, and the exhaust B is performed from the discharge port.

FIG. 2 shows a case where the central cooling fan 11 is stopped for some reason. Central cooling fan 11
Is closed by its own weight so as not to receive wind pressure from the discharge port. Therefore, the discharge port of the stopped cooling fan can be closed to prevent the backflow D of air therefrom.

On the other hand, the wind C in the electronic device which should be taken in by the cooling fan which is originally stopped is distributed and taken in by the cooling fans on both sides, and is discharged from the discharge port. Thereby, even if a part of the cooling fan stops, the same intake and exhaust operations as before the stop can be performed.

FIG. 5 is a perspective view of a cooling fan unit according to a second embodiment of the present invention. In this embodiment, a single cooling fan 11 is divided into a plurality of windshield plates 12.
a are attached so as to be openable and closable. In this embodiment, four cooling plates 12 are provided for one cooling fan 11.
a is supported by the bearing 16 so as to be rotatable about the rotation axis. The bearings 16 are mounted on the rear panel 15 at equal intervals.

In this embodiment, the size of the wind shield plate 12a is small.
Since it can be reduced in weight, it can be used for a cooling fan with weak wind force.

FIGS. 6, 7, and 8 show a cooling fan unit according to a third embodiment of the present invention. In this embodiment, the bearing 17 on which the wind shield plate 12 is mounted is connected to the cooling fan 11.
Frame. That is, the cooling fan 11 and the bearing 17 have an integral structure. Therefore, there is no need to attach the rear panel 15 as in the other embodiments. As shown in FIGS. 7 and 8, the bearing 17 has a guide groove 18 that opens upward, and can be attached to the bearing 17 by passing the rotation shaft 19 of the wind shield plate 12 therethrough.

In the above configuration, the cooling fan and the bearing are integrally formed, so that the efficiency of the operation of mounting the fan unit can be improved.

FIG. 9 is a perspective view showing a fourth embodiment of the cooling fan unit of the present invention. In the present embodiment, a plurality of divided wind shield plates 1 for one cooling fan 11.
2b are mounted so as to be openable and closable, and a bearing 17 is formed integrally with the cooling fan 11. The bearing 17 has a guide groove 20 formed in the horizontal direction. Therefore, the wind shield plate 12 b is
By attaching the rotating shaft to 0, it can be easily attached.

In such a configuration, the mounting operation is easy because the bearing 17 is integral with the cooling fan 11. Further, the wind shield plate can be divided into a plurality of sheets to reduce the size and weight. Further, since the size and weight of the wind shield plate is reduced, it can be used for a small-sized cooling fan with weak wind force.

FIG. 10 is a perspective view showing a cooling fan unit according to a fifth embodiment of the present invention, and FIG. 11 is an enlarged perspective view of a main part thereof. In this embodiment, the rotating shaft 22 attached to the wind shield plate 12 is rotatably supported by a bearing 21.
A round hole 23 is formed in the bearing 21 at a position corresponding to the screw hole for mounting the cooling fan 11.

With the above configuration, both the cooling fan 11 and the bearing 21 can be fixed at the same time by the same screw 24. Further, since the air shield plate 12 is fixed by screws, the work of replacing the wind shield plate 12 can be performed efficiently.

[0029]

According to the present invention, a wind shield is provided so as to be openable and closable in the vicinity of a discharge port of a cooling fan, the wind shield is opened when the cooling fan rotates, and the wind shield is opened when the cooling fan stops. Even when a part of the cooling fan is stopped due to a failure or the like, the air is prevented from flowing backward from the discharge port, so that dust and the like are prevented from entering the inside of the electronic device. It is possible to prevent the intake and exhaust paths of the rotating cooling fan from being disturbed, thereby preventing the temperature inside the electronic device from rising.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a state where a part of the cooling fan unit is stopped.

FIG. 3 is a perspective view showing a wind shield plate mounting portion of the cooling fan unit.

FIG. 4 is an essential part side view showing a state in which a wind shield plate of the cooling fan unit is opened.

FIG. 5 is a perspective view of a cooling fan unit according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a cooling fan unit according to a third embodiment of the present invention.

FIG. 7 is a side view showing a mounting portion of a wind shield plate according to a third embodiment of the present invention.

FIG. 8 is an enlarged side view of a main part showing a mounting portion of the wind shield plate in the third embodiment.

FIG. 9 is a perspective view illustrating a cooling fan unit according to a fourth embodiment of the present invention.

FIG. 10 is a perspective view showing a cooling fan unit according to a fifth embodiment of the present invention.

FIG. 11 is an enlarged perspective view of a main part showing a fifth embodiment of the cooling fan unit of the present invention.

FIG. 12 is an exploded perspective view showing an example of a conventional cooling fan unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cooling fan unit 11 Cooling fan 12 Wind shield 13 Rotation shaft 14 Bearing 15 Back panel 16 Bearing 17 Bearing 18 Guide groove 19 Rotation shaft 20 Guide groove 21 Bearing 22 Rotation shaft 23 Round hole 24 Screw

Claims (5)

[Claims] 1. A cooling fan unit comprising: a plurality of cooling fans; and a wind shield plate provided to open and close the ventilation outlets of each of the cooling fans, respectively. The windshield corresponding to the cooling fan that has stopped rotating among the plurality of cooling fans is closed, and the windshield corresponding to the cooling fan that continues rotating is configured to be opened. Cooling fan unit. 2. The cooling fan unit according to claim 1, wherein the wind shield plate is divided into a plurality of sheets. 3. The cooling fan unit according to claim 1, wherein the bearing supporting the wind shield plate is formed integrally with a frame of the cooling fan. 4. The cooling fan unit according to claim 1, wherein a fixture for attaching a rotation shaft of the wind shield plate is fixed to a frame of the cooling fan. 5. The cooling fan unit according to claim 1, wherein the bearing supporting the wind shield plate is fixed together by the screw for fixing the cooling fan.