JP3505454B2 - Fan motor device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan motor device for cooling the inside of electronic equipment such as personal computers.

[0002]

2. Description of the Related Art A conventional fan motor device is shown in FIG. The fan motor device 1 includes a housing 5 having a rectangular planar shape and a fan motor 4. The housing 5 has an air flow path 5a having a circular cross section, which communicates from the intake port 5b to the exhaust port (not shown).

The fan motor 4 is arranged in the air flow path 5a and has a fan 3 which rotates integrally with the rotary shaft 2a of the motor 2. The housing 5 is integrally molded with resin,
An air passage 5a having one end serving as an intake port 5b and the other end serving as an exhaust port (not shown); and a cylindrical portion forming an outer wall of the air passage 5a,
A rectangular rectangular portion 5g provided at each end of the cylindrical portion
1 and 5g2 (5g2 is not shown).

Insertion holes 5c into which screws for attaching the fan motor device 1 to, for example, an electronic device are inserted are formed at the four corners of the rectangular portion 5g1. On the four edges of the rectangular portion 5g1 that are the opening edges of the intake port 5b, tapered diameter-enlarged portions 5d are formed and communicate with the air flow path 5a.

The four side surfaces of the rectangular portion 5g1 are separated from the corner (that is, closer to the midpoint of the side surface), and the rectangular portion 5g1
The wall thickness of No. 1 becomes smaller, and in this vicinity, the peripheral edge of the air flow path 5a and the outer edge of the rectangular portion 5g1 are formed in substantially contact with each other.
Therefore, the outer shape of the fan 3 is enlarged within a limited size so that the blowing characteristics can be maximized.

Further, a support leg (not shown) extending radially inward from the four corners is provided on the rectangular portion on the other end side, and the fan motor 4 is supported by being connected to the fixed portion of the fan motor 4. There is. When the fan 3 rotates, the air flowing in from the intake port 5b passes through the air passage 5a along the rotating shaft 2a and is exhausted from the exhaust port (this type of fan is called an axial fan type).

The fan motor device 1 is arranged such that the intake port 5b faces the inside of the electronic device and the exhaust port opens outside the device in order to exhaust hot air in the electronic device to the outside. When the device operates, hot air in the device is exhausted to the outside of the device through the device, and the electronic device is cooled.

[0008]

However, in the conventional fan motor device 1 described above, the air in the equipment may not be sufficiently ventilated and desired cooling may not be performed. This is because the amount of air is insufficient with respect to the amount of heat generation, and the arrangement of various components in the device obstructs the air flow around the desired component having a large amount of heat generation.

The former cause can be improved by changing the specifications such as enlarging the outer shape of the fan and increasing the rotation speed of the fan. However, the size of the fan motor device in the equipment and the current used are usually limited, and a fundamental solution cannot be achieved. Regarding the latter cause, the arrangement of various parts in the equipment including the fan motor device is changed significantly so that the air circulation around the parts having a large amount of heat generation is not obstructed, which is substantially difficult.

Therefore, the cooling efficiency in the device must be improved without changing the arrangement of various parts in the device and without substantially changing the specifications of the fan outer shape and the rotation speed of the fan motor device. I won't.

The present invention has been made in view of the above problems, and provides a fan motor device capable of improving the cooling efficiency in the cooled portion without changing the specifications such as the outer shape and the rotation speed of the fan. The purpose is to provide.

[0012]

In order to achieve the above object, according to the present invention, there is provided a housing having a cylindrical portion forming an air flow passage having a circular cross section and having an intake port and an exhaust port opened at both ends of the cylindrical portion. A fan motor device provided in the cylindrical portion, the housing communicates with at least one opening edge of the intake port or the exhaust port, and expands in a radial direction from the opening edge. Before expanding the diameter expansion part leaving at least a part of non-expansion part
The air is exhausted from the space on the upstream side of the intake port where the air flows into the air flow path or the air flow path, which is arranged unevenly or at two locations facing each other. The ventilation characteristic is such that the air circulation in the space downstream of the exhaust port is partially different.

According to this structure, the opening area of the intake port or the exhaust port is provided with the expanded diameter portion by the expanded diameter portion without changing the specifications such as the outer shape and the rotation speed of the fan .
It is possible to widen the portion, and it is possible to increase the amount of air that is taken in or exhausted only for that portion .

In addition, a projecting expanded portion that projects from the rectangular portion provided outside the cylindrical portion, is formed in the rectangular portion.
It is preferable that the projecting enlarged diameter portion is formed on one side to three sides, and the projecting enlarged diameter portion is formed around a portion on one side of the rectangular portion where the outer edge of the rectangular portion and the peripheral edge of the air flow path in the cylindrical portion are closest to each other.

According to this structure, when the expanded diameter portion is provided on the intake port side, the former is a unit volume in the upstream space of the intake port that flows in centering on the expanded diameter portion and the other upstream side space. The amount of air movement per hit increases, and the amount of airflow can increase. As a result, the blowing characteristics in the upstream space can be made partially different depending on the arrangement of the expanded diameter portion.

Similarly, when the expanded diameter portion is provided on the exhaust port side,
In the downstream side space of the exhaust port discharged around the expanded diameter portion and the other downstream side space, the former has a larger amount of movement of air per unit volume and can increase the air volume,
The ventilation characteristics in the downstream space can be partially different. Furthermore, when it is provided at both the intake port and the exhaust port,
Both effects can be obtained when the above-mentioned independent provision is performed.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. For convenience of description, the fan motor device according to the embodiment of the present invention will be described by taking as an example a device used for cooling an electronic device similar to the conventional example, and the same portions as those in FIG. Attached. Figure 1
FIG. 1A is a plan view showing a fan motor device according to a first embodiment, FIG. 1B is a side sectional view, and FIG.
It is an AA sectional view in (a). 2 is a perspective view showing a housing described later.

The fan motor device 1 is composed of a housing 5 having a rectangular planar shape and a fan motor 4 supported by the housing 5. When the fan motor 4 rotates, air is blown along the rotation shaft 2a. It is an axial fan type.

The fan motor 4 is provided in the air flow path 5a and has a fan 3 which rotates integrally with the rotary shaft 2a of the motor 2. The housing 5 is integrally molded with resin,
An air flow path 5 having an intake port 5b at one end and an exhaust port 5f at the other end
a, a cylindrical portion 5h forming the outer wall of the air flow path 5a, and rectangular portions 5g1 having rectangular shapes provided at both ends of the cylindrical portion 5h,
5g2.

Insertion holes 5c into which screws for attaching the fan motor device 1 to, for example, an electronic device are inserted are formed at the four corners of the rectangular portions 5g1 and 5g2. On the four edges of the rectangular portion 5g1 that are the opening edges of the intake port 5b, tapered diameter-enlarged portions 5d are formed and communicate with the air flow path 5a.

The four side surfaces of each of the rectangular portions 5g1 and 5g2 become thinner as the distance from the corner increases (that is, toward the midpoint of the side surface), and the thickness of the rectangular portion 5g1 becomes smaller. The outer edge of the portion 5g1 is formed so as to be substantially in contact with it. Therefore, the outer shape of the fan 3 is enlarged within a limited size so that the blowing characteristics can be maximized.

Further, in the rectangular portion 5g2 on the exhaust port 5f side,
Support legs (not shown) extending radially inward from the four corners are provided, and the fan motor 4 is supported by being connected to a fixed portion of the fan motor 4. When the fan 3 rotates, the intake port 5
The air flowing in from b flows along the rotary shaft 2a along the air flow path 5a.
Through the exhaust port 5f.

Furthermore, the opening edge of the intake port 5b (air passage 5a
(A peripheral edge) and one side surface forming the rectangular portion 5g1 (FIG. 1A).
Then, from the opening edge to the rectangular part 5g
1 has a taper surface extending to the outer edge, and in addition, a protruding expanded portion 5e protruding from this outer edge is formed.

In the projecting expanded portion 5e, the opening edge of the intake port 5b is centered around the rotary shaft 2a, and the peripheral edge of the air flow path 5a and the outer edge of the rectangular portion 5g1 are located at a predetermined angle range W in FIG. 1 (a). It projects radially in the direction of about 60 degrees centering on the adjacent portion. The projecting expanded diameter portions 5e are adjacent to the expanded diameter portions 5d.
It communicates with the lower left corner and the lower right corner of FIG. 1A, and also communicates with the air flow path 5a.

The fan motor device 1 having such a structure is
In order to exhaust the hot air inside the electronic device to the outside, the intake port 5b faces the inside of the device and the exhaust port 5f is arranged outside the device. When the device operates, hot air in the device is exhausted to the outside of the device through the device, and the electronic device is cooled.

When the intake port 5b is divided into an upper side region and a lower side region of the straight line L passing through the rotary shaft 2a in FIG. 1 (a) to be an upper region and a lower region, respectively, the amount of air flowing from the intake port 5b. Is
The lower area is increased by the area of the opening formed by the projecting expanded diameter portion 5e.

As a result, the amount of air flowing in from the lower region of the intake port 5b is increased and the total amount of air is increased as compared with the case where the projecting expanded portion 5e is not provided as in the conventional example shown in FIG. The amount of airflow increases. That is, it is possible to increase the amount of air flowing in from one direction.

Therefore, when the fan motor device 1 is attached to an electronic device, the projecting expanded portion 5e is formed on the line connecting the rotating shaft 2a and a component having a large heat generation, which is arranged in the upstream space of the intake port 5b. It is arranged so as to be positioned (for example, when there is a component having a large amount of heat generation in the lower side of the device, the protruding expanded portion 5e of the fan motor device 1 is arranged on the lower side). With this configuration, the amount of movement of air per unit volume in the upstream space where there is a component with a large amount of heat generation can be made larger than in other spaces, so that the cooling efficiency becomes good.

The housing 5 has one rectangular portion 5g.
Only a part of 1 protrudes to increase the outer shape, and the other parts and the other rectangular part 5g2 maintain the current shape, which does not hinder the installation of the fan motor device 1 in the electronic device. Absent.

In this way, the cooling efficiency in the device can be improved without changing the arrangement of various parts in the device and without substantially changing the specifications of the outer shape and the rotation speed of the fan of the fan motor device 1. Can be improved. Although the expanded diameter portion 5d and the projected expanded diameter portion 5e are provided on the intake port 5b side, they may be provided on the opening edge of the exhaust port 5f.
The same effect can be obtained even if it is provided on both the side and the exhaust port 5f side. Further, as described later, a plurality of projecting expanded diameter portions 5e may be provided.

Next, the second to fourth embodiments will be described with reference to FIG.
This will be described with reference to (b) to (d). FIG. 3A shows the first
FIG. 3B is a schematic plan view schematically showing a plan view of the housing of the fan motor device of the embodiment, and FIG.
(D) is also a schematic plan view of the housing. The second to fourth embodiments are different from each other in the formation position of the protruding expanded diameter portion 5e of the housing 5, and the other portions are the same as those in the first embodiment.

In the second embodiment shown in FIG. 3 (b), the projecting expanded diameter portions 5e of the housing 5 are provided at two adjacent locations (on the left side and the lower side of the housing 5 in the figure) of the rectangular portion 5g1. With this configuration, the amount of air flowing in from the region of the intake port 5b centered on the both projecting enlarged diameter portions 5e becomes larger than the amount of air flowing in from other regions. That is, in the fan motor device 1 of the second embodiment, the overall air volume is increased by increasing the air volume that flows in from the two directions in which the protruding expanded portion 5e is present, as compared with the first embodiment.

In the third embodiment shown in FIG. 3 (c), the protruding expanded diameter portion 5e of the housing 5 is a rotating shaft 2a having a rectangular portion 5g1.
It is provided at two locations (upper side and lower side of the housing 5 in the figure) opposed to each other through. With this configuration, the amount of air flowing in from the region of the intake port 5b centered on the both projecting enlarged diameter portions 5e becomes larger than the amount of air flowing in from other regions. That is, the fan motor device 1 of the third embodiment has substantially the same air volume as that of the second embodiment, but the direction in which a large amount of air flows into the intake port 5b is different.

The fourth embodiment of FIG. 3 (d) is a housing 5
The projecting expanded diameter portions 5e are provided at three positions (left side, right side and lower side of the housing 5 in the figure) of the rectangular portion 5g1. With this configuration, the amount of air flowing in from the region of the intake port 5b centered on each of the projecting expanded diameter portions 5e becomes larger than the amount of air flowing in from other regions. That is, in the fan motor device 1 of the fourth embodiment, the amount of air flowing in from each of the three directions in which each of the expanded diameter portions 5e is present is larger than that in the case of the third embodiment, and the overall amount of air is further increased.

Any of the fan motor devices of the second to fourth embodiments is selected in consideration of the arrangement of the protruding expanded portion 5e with respect to a portion to be cooled in the electronic device, or conversely, a portion not to be cooled. do it. Incidentally, the first to the fourth
The projecting expanded diameter portions 5e in the embodiment are not limited to the above, and may be arranged so as to be arbitrarily shifted in the circumferential direction around the rotation shaft 2a of the fan motor 4. By doing so, more detailed setting can be performed in the direction in which the air volume is desired to be increased without depending on the installation position of the fan motor device 1.

Further, in any of the second to fourth embodiments, as in the first embodiment, the outer shape and the number of rotations of the fan of the fan motor device can be changed without changing the arrangement of various parts in the device. The cooling efficiency in the device can be improved without substantially changing the specifications.

Next, a fan motor device of the fifth embodiment will be described with reference to FIG. It should be noted that the present embodiment is generally similar to the above-described embodiment, and different parts will be mainly described. The housing 5 of FIG. 5 differs from the housing 5 of FIGS. 1 to 4 described above in that the enlarged diameter portions 5d are provided at the four corners of the rectangular portion 5g1.
The fan motor device 1 does not have.

The fan motor device 1 is applied to, for example, a type having a relatively small outer dimension. That is, with the downsizing of the housing 5 and the fan motor 4, the rectangular portion 5g1,
Occupancy of the insertion hole 5c with respect to 5g2 may be increased and the expanded diameter portion may be omitted. Intake port 5 of the housing 5
In b, the protruding expanded portion 5e is formed to have a tapered surface by protruding radially from the outer edge of one side surface of the rectangular portion 5g1. With this configuration, even in the fan motor device that does not have the expanded diameter portions 5d at the four corners, it is possible to increase the air volume that flows in from the protruding expanded diameter portion 5e and increase the overall air volume as in the above embodiment.

Next, the sixth to eighth embodiments will be described with reference to FIG.
This will be described with reference to (b) to (d). 5 (a) is the fifth
FIG. 6 is a schematic plan view schematically showing a plan view of the housing of the fan motor device of the embodiment, and FIG.
(D) is also a schematic plan view of the housing. The sixth to eighth embodiments differ from each other in the formation position of the projecting expanded diameter portion 5e of the housing 5, and the other portions are the same as in the fifth embodiment.

In the sixth embodiment shown in FIG. 5 (b), the projecting enlarged diameter portions 5e of the housing 5 are provided at two adjacent portions of the rectangular portion 5g1 (the left side and the lower side of the housing 5 in the figure). In the seventh embodiment of FIG. 5 (c), the projecting expanded diameter portion 5e of the housing 5 is provided at two locations (the upper side and the lower side of the housing 5 in the figure) facing each other via the rotating shaft 2a of the rectangular portion 5g1. ing. In the eighth embodiment of FIG. 5 (d), the projecting enlarged diameter portions 5e of the housing 5 are provided at three locations of the rectangular portion 5g1 (in the drawing, the left side, the right side, and the lower side of the housing 5).

By doing so, the amount of air flowing in from the predetermined direction is further increased as compared with the fifth embodiment, and the overall amount of air is increased. Therefore, it is possible to obtain the same effects as those of the above-described second to fourth embodiments.

Next, a fan motor device according to the ninth embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a plan view showing the fan motor device of the ninth embodiment, and FIG. 7 is a perspective view showing the housing of the fan motor device.
It should be noted that the present embodiment is generally similar to the above-described embodiment, and different parts will be mainly described.

The housing 5 has one of the four corners of the rectangular portion 5g1.
Expanded portion 5d only at the location (upper left side of housing 5 in the figure)
Is different from the above embodiment. This is because the projecting expanded diameter portion cannot be formed due to the peripheral arrangement when the fan motor device is attached, and the conventional example (see FIG. 11).
In a small fan motor device such as the housing 5 that does not have the expanded diameter portion 5d, the amount of air flowing in from a specific direction is increased to increase the total amount of air.

Similarly, the tenth to twelfth embodiments will be described with reference to FIGS. FIG. 8A is a schematic plan view schematically showing a plan view of the housing of the fan motor device according to the ninth embodiment, and FIG.
(D) is also a schematic plan view of the housing. The tenth to twelfth embodiments are different from each other in the formation position of the expanded diameter portion 5d of the housing 5, and the other parts are the same as the ninth embodiment.

In the tenth embodiment of FIG. 8B, the enlarged diameter portion 5d of the rectangular portion 5g1 of the housing 5 is provided at two adjacent positions (in the figure, the upper left side and the upper right side of the housing 5). With this configuration, the amount of air flowing in from the region of the intake port 5b centered on both the expanded diameter portions 5d becomes larger than the amount of air flowing in from other regions. That is, in the fan motor device 1 of the tenth embodiment, the amount of air flowing in from the two directions in which the expanded diameter portion 5d is present is even greater than in the case of the ninth embodiment, and the overall amount of air is also increased.

In the eleventh embodiment of FIG. 8C, the enlarged diameter portion 5d of the rectangular portion 5g1 of the housing 5 is opposed to each other via the rotary shaft 2a (in the drawing, the upper left side and the lower right side of the housing 5). ) Is provided. With this configuration, the amount of air flowing in from the region of the intake port 5b centered on both the expanded diameter portions 5d becomes larger than the amount of air flowing in from other regions.
That is, the fan motor device 1 of the eleventh embodiment is
Although the overall air volume is almost the same as that in the case of the 0th embodiment, the direction of the airflow that flows into the intake port 5b is different.

In the twelfth embodiment of FIG. 8 (d), the enlarged diameter portion 5d of the rectangular portion 5g1 of the housing 5 is provided at three positions (in the figure,
It is provided on the left side, the right side, and the lower side of the housing 5. By doing so, each expanded diameter portion 5 of the intake port 5b is
The air volume that flows in from the area centered on d is larger than the air volume that flows in from other areas. That is, in the fan motor device 1 of the twelfth embodiment, the amount of air that flows in from the three directions in which each of the expanded diameter portions 5d is present is larger than in the case of the eleventh embodiment, and the overall amount of air is even greater.

Next, a fan motor device according to the thirteenth embodiment will be described with reference to FIGS. 9 and 10. 9 is a plan view, and FIG. 10 is a perspective view showing the housing.
It should be noted that the present embodiment is generally similar to the above-described embodiment, and different parts will be mainly described.

The housing 5 of the fan motor device 1 of this embodiment has a cylindrical portion 5h forming the outer wall of the air passage 5a.
And a mounting portion 5j that has insertion holes 5c at equal intervals in the circumferential direction on the outer surface of the cylindrical portion 5h and protrudes like a collar. The rectangular portions 5g1 and 5g2 are formed in the cylindrical portion 5h as in the above embodiment.
(See FIG. 1) is different.

The cylindrical portion 5h is formed with a projecting expanded portion 5e which projects from the opening edge on the intake port 5b side and has a tapered surface. The projecting enlarged diameter portion 5e has a predetermined angle range W (adjacent both mounting portions 5) along the opening edge of the intake port 5b centered on the rotating shaft 2a.
It projects in the radial direction over a range of about 80 degrees centering on the midpoint between j.

The protruding expanded portion 5e communicates with the air passage 5a. Even in such a configuration, the same effect as above can be obtained, and as described above, the rectangular portions 5g1 and 5g2 can be obtained.
Since there is no protrusion, the expanded diameter portion 5a can be formed at an arbitrary position. In addition, the protruding expanded portion 5e in the present embodiment is
Although not shown, the number and parts may be changed as in the above embodiment.

Although the embodiment of the fan motor device of the present invention has been described above, the scope of the present invention is not limited to these and can be variously modified. For example, although the housing 5 is made of resin in the above, a metal such as aluminum may be used. Further, the fan motor device may be used for cooling a heat sink attached to a heating element such as a CPU of a personal computer as well as for cooling the inside of an electronic device.

[0053]

According to the present invention, the opening area of the intake port or the exhaust port provided with the expanded diameter portion is widened by the expanded diameter portion by the expanded diameter portion without changing the external dimensions or the number of revolutions of the fan motor device. It is possible to increase the amount of intake or exhaust air.

Further, the expanded diameter portion is formed on the opening edge of the intake port or the exhaust port , leaving at least a part of the non-expanded portion.
By arranging them unevenly or at two opposite locations, it is possible to make the blowing characteristics in the upstream space or the downstream space partly different by the arrangement of the expanded diameter portion. That is, when the expanded diameter portion is provided on the intake port side, the former can increase the air volume in the upstream space of the intake port that flows in centering on the expanded diameter portion and the other upstream space, so that in the upstream side space. The air blowing characteristics of can be partially changed by the arrangement of the expanded diameter portion.

Similarly, when the expanded diameter portion is provided on the exhaust port side,
In the downstream space of the exhaust port exhausted around the expanded portion and the other downstream spaces, the former can increase the air volume, so the ventilation characteristics in the downstream space can be partially determined by the arrangement of the expanded portion. Can be different. Furthermore, when it is provided at both the intake port and the exhaust port, both effects of the above-mentioned independent provision can be obtained.

Therefore, in the fan motor device of the present invention, depending on the way of arranging the expanded diameter portion, the air volume can be increased or the air flow path can be increased without substantially changing the outer dimensions or the rotational speed of the fan motor. Since the blowing characteristics can be partially varied according to the arrangement of the cooled object to be cooled in the space on the upstream side of the inflowing inlet port or the space on the downstream side of the exhausting outlet port, the cooling efficiency becomes good.

[Brief description of drawings]

FIG. 1 is a diagram showing a fan motor device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a housing of the fan motor device according to the first embodiment of the present invention.

FIG. 3 is a schematic plan view showing a housing of a fan motor device according to first to fourth embodiments of the present invention.

FIG. 4 is a plan view showing a fan motor device according to a fifth embodiment of the present invention.

FIG. 5 is a schematic plan view showing a housing of a fan motor device according to fifth to eighth embodiments of the present invention.

FIG. 6 is a plan view showing a fan motor device according to a ninth embodiment of the present invention.

FIG. 7 is a perspective view showing a housing of a fan motor device according to a ninth embodiment of the present invention.

FIG. 8 is a schematic plan view showing a housing of a fan motor device according to ninth to twelfth embodiments of the present invention.

FIG. 9 is a plan view showing a fan motor device according to a thirteenth embodiment of the present invention.

FIG. 10 is a perspective view showing a housing of a fan motor device according to a thirteenth embodiment of the present invention.

FIG. 11 is a plan view showing a conventional fan motor device.

[Explanation of symbols] 1 Fan motor device 2 motor 3 fans 4 fan motor 5 housing 5a Air flow path 5b intake port 5c insertion hole 5d Expanding part 5e Projection expansion part 5f exhaust port 5g rectangular part 5h cylindrical surface 5j Mounting part

Claims (4)

(57) [Claims] 1. A cylindrical portion forming an air passage having a circular cross section is provided.
In addition, open the intake port and the exhaust port at both ends of the cylindrical part.
Housing, and a fan mode arranged in the cylindrical portion.
In a fan motor device including a
At least one of the intake port and the exhaust port.
Communicates with the opening edge and expands the diameter from the opening edge in the radial direction.
The expanded partAt least a part of the non-expanded portion is left
Arranged unevenly with respect to the opening edge or in two opposite locations
The upstream side of the intake port where air flows into the air flow path
The exhaust from which air is discharged from the space or the air flow path
Ventilation with partially different air flow in the space downstream of the mouth
A fan motor device having characteristics. 2. The fan motor device according to claim 1 , wherein a rectangular rectangular portion is formed outside the cylindrical portion. 3. The fan motor device according to claim 2 , wherein the expanded diameter portion, from which the expanded diameter portion protrudes from the rectangular portion, is provided on one side to three sides of the rectangular portion . 4. On one side of the rectangular portion in which the projecting rectangular portion is formed, the projecting expanded diameter portion is formed around a portion where the peripheral edge of the air flow path and the outer edge of the rectangular portion are closest to each other. The fan motor device according to claim 3 , wherein