JPH1098290A - Cooling fan unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling fan unit, which can be inserted into a ventilating duct with high workability and can be improved in cooling efficiency. SOLUTION: A cooling fan unit, which is inserted into a ventilating duct 2 of a enclosure 1 of a device from an opening 20 of the duct 2 and forcibly introduce and discharge cooling air to and from the enclosure 1, is provided with a rotating section 4 which holds an appropriate number of cooling fans 40 positioned in parallel with an appropriate number of cooling fans 30, held on the main body section 3 of the unit. Thus the fans 40 can send cooling air in the direction opposite to the sending direction of cooling air sent from the fans 30 and formed at the front end section of the main body section 3 holding the fans 30. The fan unit is inserted into the duct 2 by rotating the section 4 until the section 4 becomes nearly perpendicular to the main body section 3 from the inserted attitude, at which the section 4 is arranged in nearly a straight line with respect to the section 3 near the terminating position of the pushing-in stroke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cooling fan unit.

[0002]

2. Description of the Related Art Conventionally, a cooling structure shown in FIG. 6 is frequently used as a cooling structure for a heating element housed in a device housing of a medium or large computer or an electronic device. That is, in this conventional example, ventilation ducts 2, 2 ′ are formed along the ceiling wall surface and the bottom wall surface in the device housing 1, and the cooling fan unit A is arranged in the ventilation duct 2.

The cooling fan unit A is formed by mounting an appropriate number of cooling fans 70 on a support 7 and is inserted and mounted through an opening 20 formed in the front wall of the ventilation duct 2. In this state, the cooling air is forcibly introduced into the apparatus housing 1 from the intake port 22 of the ventilation duct 2 ′ on the bottom wall, and is forcibly exhausted from the exhaust port 23 of the ventilation duct 2 on the ceiling.

The heat generated in the electronic device having the cooling fan unit A is large, and the cooling fan 7
When the power shortage of 0 occurs, as shown in FIG. 6B, the auxiliary fan unit A ′ is attached to the exhaust side, that is, the exhaust port 23 of the ventilation duct 2 on the ceiling to increase the exhaust efficiency. Is performed.

[0005]

However, in the conventional example described above, the auxiliary fan unit A 'is separate from the main fan unit A. There is a drawback in that work on the front and the back is required, and a power outlet, a cable, and the like need to be separately provided in the apparatus housing 1.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a cooling fan unit which has good mounting workability and can improve cooling efficiency.

[0007]

SUMMARY OF THE INVENTION According to the present invention, the above object is achieved by inserting a cooling air into a ventilation duct 2 from an opening 20 of the ventilation duct 2 of the apparatus housing 1 and pushing the cooling air into the apparatus housing 1. A cooling fan unit for forcibly introducing and exhausting air, and a front end portion of the main body 3 that holds an appropriate number of cooling fans 30 is pushed in parallel with and opposite to the cooling fan 30 on the main body 3. A rotating portion 4 for holding an appropriate number of cooling fans 40 having a blowing direction is formed, and the rotating portion 4 is inserted into the main body 3 from an insertion posture in which the rotating portion 4 is substantially straight with respect to the main body 3 near the end position of the pushing stroke. This is achieved by providing a cooling fan unit that is mounted in the ventilation duct 2 by being rotated to a mounting posture substantially orthogonal to the mounting position.

A cooling fan 30 is provided in the main body 3 and the rotating portion 4.
An appropriate number of the units 40 are mounted, and are pushed into the ventilation duct 2 from the openings 20 formed in the wall surface of the ventilation duct 2 in a substantially straight insertion posture and are mounted at predetermined positions.

The cooling fan 40 mounted on the rotating part 4 is
As shown in FIG. 1, since the cooling fan 30 on the side of the main body 3 has a blowing direction that is parallel to and opposite to the direction of the cooling fan 30, it rotates in a mounting posture orthogonal to the pushing direction near the pushing stroke end position. In this case, a cooling airflow orthogonal to the cooling airflow in the main body 3 is generated.

As a result, as shown in FIG. 4B, when the cooling fan 30 on the main body 3 side has a cooling air flow in the direction of introduction into the ventilation duct 2, that is, in the direction of arrow A,
The cooling fan 40 of the rotating part 4 generates a cooling airflow in a direction of discharging the cooling air from the ventilation duct 2 to the outside (the direction of arrow B), so that the exhaust efficiency can be improved.

As described above, according to the present invention, the cooling fans 30, 40 which are arranged in the orthogonal direction even from the narrow opening 20 and complement each other can be mounted in the ventilation duct 2, thereby increasing the number of mounting steps. The cooling efficiency can be easily improved without causing the cooling. Also, as shown in FIG.
Ventilation duct 2 with obstacles 8 such as reinforcing plates protruding from the wall
Can be easily attached to

The rotating portion 4 does not necessarily need to be held at the insertion position in the non-inserted state. Can be mounted, but when the stopper 5 is used to maintain the insertion position, the mounting workability can be improved.

The turning operation of the turning portion 4 to the mounting posture can be performed by operating the cooling fan unit from the outside of the apparatus housing 1 side. When the cooling fan unit is configured to be brought into contact with the wall surface of the ventilation duct 2 when inserted into the inside to obtain a rotational force toward the mounting position, the rotation unit 4 can be inserted simply by inserting the cooling fan unit into the ventilation duct 2.
Can be set to a predetermined posture, so that workability can be improved.

As means for rotating the rotating portion 4 using the insertion force of the cooling fan unit, the end portion of the above-described guide is inclined in the rotating direction, and the rotating portion 4 is inclined along the inclined surface. Various means such as a method of guiding the air duct in the rotation direction can be adopted.
When the forcible rotation is performed using the push-in side end wall surface 21, the guide or the like does not need to have a special shape, so that the entire structure can be simplified.

That is, in the invention according to claim 4,
A guide piece 41 is provided at the push-side end of the rotating portion 4 at a position slightly deviated from the center of rotation with respect to the main body 3 in the direction of rotation with the pushing-side terminal wall 21 of the ventilation duct 2.

In the present invention, the ventilation duct 2 is inserted in the insertion position.
First, the guide piece 41 of the rotating portion 4 that has entered the inside comes into contact with the push-in terminal wall surface 21. In this state, press-in side terminal wall 2
4 between the contact portion of the rotating member 1 and the center of rotation of the rotating portion 4.
As shown in (a), when the cooling fan unit is further pushed in due to the presence of the deviation δ, the rotation unit 4 has F × δ
Is generated, and the rotating portion 4 is rotated toward the mounting posture.

In each of the above-mentioned inventions, the rotating portion 4 is a terminal wall 2 on the push-in side of the ventilation duct 2 in which predetermined ventilation holes are formed.
It is attached in a posture along with 1, and in claim 5,
A configuration is provided for effectively preventing chattering noise and the like from occurring in the mounted state.

That is, in the invention according to claim 5,
The rotating portion 4 includes a flexible buffer 6 interposed between the rotating duct 4 and the pushing-side terminal wall surface 21 of the ventilation duct 2 when the rotating portion 4 is rotated to the mounting posture.
Is provided. A sponge body or the like can be used as the buffer 6, and when a conductor is used for the buffer 6, the shielding performance can be improved.

The power supply to the cooling fan 40 on the rotating part 4 can be performed by using a separate power supply. However, when the power is supplied via the main body part 3 as described in claim 6, Is
Separate power supply connection is not required, and the number of installation steps and the number of parts can be reduced.

Further, when the rotating section 4 is made detachable from the main body 3 as described in claim 7, the rotating section 4 is replaced in accordance with the system on the device housing 1 side. Not only can improve versatility,
The storage space can also be reduced.

[0021]

1 to 3 show an embodiment of the present invention. First, the apparatus housing 1 includes a board storage area 10 for mounting a plurality of printed boards (not shown), and ventilation ducts 2 and 2 ′ are formed above and below the board storage area 10. As shown in FIG. 1, in the present embodiment, after the cooling air is forcibly introduced into the ventilation duct 2 ′ of the bottom wall portion and exhausted from the rear wall of the ventilation duct 2 of the ceiling portion, the ventilation duct 2 of the bottom wall portion is provided. An opening 22 for installing a cooling fan unit is opened on the front wall of the ventilation duct 2 on the ceiling, as well as an intake port 22 on the front wall of the air conditioner.
Although not shown, ventilation holes are provided on the rear wall of the ventilation duct 2 at the ceiling (the pushing-side terminal wall surface 21 of the ventilation duct 2) to such an extent as not to hinder exhaust. In FIG. 1, reference numeral 11 denotes a door of the apparatus housing 1, which has a ventilation hole corresponding to the air inlet 22.

The cooling fan unit includes a main body 3 on which two cooling fans 30, 30 are mounted, and one cooling fan 4.
0 on which the rotating unit 4 is mounted. The number of cooling fans 30 and 40 mounted on the main body 3 and the rotating part 4 can be changed as appropriate.

The main body 3 is formed in a box shape and has a size that can be inserted into the opening 20 of the ventilation duct 2.
In addition, a front plate 31 for closing the opening 20 in a state of being mounted in the ventilation duct 2 is provided on the front surface of the main body 3. The main body 3 is provided with a cable 32 for supplying power to the cooling fan 30 on the main body 3 and the cooling fan 40 on the rotating part 4, and is drawn out from the front plate 31 to the outside. The cooling fan 30 mounted on the main body 3 is of a type that sucks air from the rear side and exhausts it upward as shown by an arrow A in FIG. Ventilation duct 2 from storage area 10 to ceiling
To generate a cooling airflow forcibly introducing cooling air into the air.

On the other hand, the rotating part 4 fixes the cooling fan 40 on a support plate 42 which is rotatably connected to the main body 3 via a hinge member 9 fixed to the rear end edge of the main body 3. Formed. Cooling fan 40 fixed on support plate 42
As shown in FIG. 1, as shown by an arrow B, one that generates cooling air from above to below is used.

As shown in FIG. 3, the hinge member 9 has a fixing piece 91 to the main body 3 and a stopper piece (stopper 5) at both ends of the support piece 90. The support piece 90 has a hinge insertion hole. 90a is established. In FIG. 3, reference numeral 91a denotes a screw insertion hole used when fixing the fixing piece 91 to the main body 3.

The support plate 42 is a plate having a ventilation hole 42a at the center, and a hinge projection 42b is cut and raised at one end edge, and a hinge pin 92 penetrates the hinge insertion hole 90a on the hinge member 9 side. Is inserted into the hinge projection 42b and connected to the hinge member 9 (see FIGS. 2 and 5). In addition, the support plate 42 is placed on the stopper piece 5 of the hinge member 9 in a state where the support plate 42 is connected by the hinge pin 92, and the insertion posture in which the main body 3 and the rotating portion 4 are aligned in a straight line is maintained. Note that the hinge pin 92 can be fixed to the hinge member 9 by caulking or the like, but can also be detachably fixed by using an E-shaped retaining ring or the like. The unit 4 can be changed according to the specifications.

Further, a guide piece 41 is bent at the other end edge of the support plate 42. The guide piece 41 is formed by bending the end of the support plate 42 upward, and its tip is located δ above the center position of the hinge pin.

As shown by the broken line in FIG. 3, a buffer member 6 made of a sponge is attached to the back surface of the support plate 42 so as to surround the ventilation hole 42a. Therefore, in this embodiment, when the cooling fan unit is inserted into the ventilation duct 2 in the ceiling in the insertion position shown in FIG. 4A, the tip of the guide piece 41 is pushed into the pushing-side terminal wall 21 (the rear wall) of the ventilation duct 2. ) When the cooling fan unit is further pushed in the depth direction due to the deviation δ between the center of rotation of the rotating portion 4 and the abutting portion in the abutting state with the back wall 21, the insertion force causes A turning moment in the direction of arrow M is generated in the turning portion 4, and the turning portion 4 turns upward and shifts to the mounting posture, and as shown in FIG.
The back surface of the support plate 42 abuts against the back wall 21 of the stopper piece 5 to maintain the mounting posture.

In the mounting position, the cooling fan 4
When 0 is operated, an airflow in the direction of arrow B in FIG. 4B is formed, and the exhaust efficiency of the ventilation duct 2 is improved. Further, as shown in FIG. 4B, since the supporting piece 90 is in contact with the back wall 21 via the buffer body 6 as shown in FIG. The generation of abnormal noise is prevented.

In the above description, the device housing 1
Although the cooling fan unit is arranged such that the cooling air is introduced from the front bottom and exhausted from the rear ceiling, the flow of the cooling air can be changed as appropriate.

[0031]

As is apparent from the above description, according to the present invention, it is possible to improve the exhaust efficiency with a simple structure and improve the overall cooling capacity.

[Brief description of the drawings]

FIG. 1 is a diagram showing the present invention.

FIG. 2 is a perspective view showing a main part of the present invention.

FIG. 3 is an exploded perspective view of FIG. 2;

FIG. 4 is a view showing a mounted state of a cooling fan unit;
(A) is a figure showing the state where it pushed in the ventilation duct in the insertion posture, and (b) is a figure showing the state where it shifted to the mounting posture.

5 is an enlarged view of a main part of FIG. 4, (a) is an enlarged view of FIG. 4 (a), and (b) is an enlarged view of FIG. 4 (b).

6A and 6B are views showing a conventional example, in which FIG. 6A is a perspective view showing a state in which a cooling fan unit is mounted, and FIG. 6B is a perspective view showing a state in which an auxiliary fan unit is added to the back.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device housing 2 Ventilation duct 20 Opening 21 Push-in terminal wall surface 3 Main part 30 Cooling fan 4 Rotating part 40 Cooling fan 41 Guide piece 5 Stopper 6 Buffer

Claims (7)

[Claims] 1. A cooling fan unit which is mounted by being pushed into an air duct through an opening of an air duct of an apparatus casing and forcibly introducing and exhausting cooling air into the apparatus casing, wherein a proper number of cooling fans are provided. The push-in tip of the main body that holds the main body is formed with a rotating portion that holds an appropriate number of cooling fans having a blowing direction in a direction opposite to that of the cooling fan on the main body, and a pushing stroke end position. A cooling fan unit which is mounted in a ventilation duct by rotating a rotating part in a vicinity thereof from an insertion posture which is substantially linear with respect to the main body to a mounting posture which is substantially orthogonal to the main body. 2. The cooling fan unit according to claim 1, wherein said rotating portion is held in an inserted posture by a stopper formed at a connecting portion with the main body. 3. The cooling fan unit according to claim 1, wherein the rotating portion comes into contact with a wall surface of the ventilation duct when the rotating portion is inserted into the ventilation duct, and obtains a rotating power toward the mounting posture. 4. A guide piece is provided at the push-side tip of the rotating portion, which abuts against the pushing-side terminal wall surface of the ventilation duct at a position slightly deviated from the center of rotation with respect to the main body in the direction of rotation. The cooling fan unit according to claim 3. 5. A flexible cushioning member interposed between the pivoting portion and a pushing-side terminal wall surface of the ventilation duct when pivoting to the mounting posture. 4. The cooling fan unit according to 1. 6. The cooling fan unit according to claim 1, wherein power is supplied to the cooling fan of the rotating section via a main body. 7. The cooling fan unit according to claim 1, wherein the rotating portion is detachable from the main body.