JP5516629B2 - Fan device - Google Patents

Description

  The present invention relates to a fan device, and more particularly to a small and high-performance fan device having a high degree of freedom in design layout.

  Conventionally, fan devices have been widely used in various devices such as OA devices and home appliances in order to cool the heat generated when the devices are driven. Particularly in personal computers and server devices, the amount of heat generated during operation of the CPU chip and other LSIs has increased with the dramatic increase in processing speed. Therefore, there is a demand for a highly efficient fan device that is smaller and has a large air volume.

  As an example of such a conventional fan device, for example, those shown in FIGS. 12 to 15 are known. Here, FIG. 12 is a cross-sectional view showing a conventional fan device, and is a DD cross-sectional view of FIG. 13 to be described later. FIG. 13 is a bottom view showing a conventional fan device, FIG. 14 is a cross-sectional view showing the vicinity of the cable fixing portion, and FIG. 15 is a cross-sectional view showing the cable fixing portion in the EE cross section of FIG. In addition, the arrow which attached | subjected the code | symbol F in a figure typically shows the flow of air.

  As shown in FIGS. 12 to 14, a conventional centrifugal fan device 100 is disposed coaxially with a fan 13 having a plurality of blades 12 at the peripheral edge of the rotor portion 11 and inside the rotor portion 11. The motor means 15 for rotating the fan 13, the fan 13 and the motor means 15 are accommodated, and the casing has the intake ports 16 and 17 in the rotational axis direction of the fan 13 and the exhaust port 18 in the radial direction of the fan 13. 20, and the fan 13 is rotated to blow air sucked from the intake ports 16 and 17 to the exhaust port 18.

  The rotor portion 11 of the fan 13 is formed in a cylindrical shape including a top surface portion 11a and a side surface portion 11b. The hole 20a of the casing 20 is a hole provided for fixing the casing 20 to the printed circuit board 42 or the like with screws.

  The fan 13 is formed as the rotor part 11 of the motor means 15. That is, the rotor portion 11 of the fan 13 has a rotating shaft (motor means) 14 suspended from the center of the inner wall of the top surface portion 11a, and includes a magnet (motor means) 22 on the inner peripheral surface of the side surface portion 11b. The rotating shaft 14 is made of metal.

  The stator portion of the motor means 15 includes a bearing (motor means) 23 that rotatably supports the rotating shaft 14 and a support member (motor means) that supports the bearing 23 and is fixed to a motor mounting portion 130 described later. 24, a control board 27 on which a control IC 26 for controlling drive current and the like is mounted, and a coil 25 fixed to the control board 27.

  The motor mounting portion 130 is formed for mounting the motor means 15. The motor mounting portion 130 is disposed so that a part of the bottom surface of the casing 20 near the air inlet 17 protrudes outward (downward) from the other outer surface portion 21 of the casing 20. Further, the motor mounting portion 130 is connected to the opening peripheral edge portion of the air inlet 17 by three to four ribs 131.

  Also, as shown in FIGS. 12 to 15, the cable 40 from the control board 27 is drawn out of the casing 20 along the outer surface (bottom face) of the casing 20 and connected to the connector 41 on the printed board 42. Has been.

  As a related prior art, a type in which a portion corresponding to the motor mounting portion 130 does not protrude outward (downward) from the other outer surface portion of the casing is also known (see, for example, Patent Document 1). ).

Japanese Patent Laid-Open No. 2004-52735

  In order to cool devices and LSIs that generate a large amount of heat, a large fan device is required. In particular, in the prior art described in the illustrated example, the motor mounting portion 130 is disposed so as to protrude outward (downward) from the other outer surface portion 21 of the casing 20. A sufficient air passage space could not be secured below. For this reason, the degree of freedom of device layout and mounting is further reduced, and the size of the device is increased.

  The present invention has been made in view of the above, and an object of the present invention is to provide a small and high-performance fan device having a high degree of freedom in design layout.

  In order to solve the above-described problems and achieve the object, the present invention provides a printed circuit board, a fan having a plurality of blades on a peripheral portion of the rotor portion, and coaxially disposed on the inner side of the rotor portion. A motor unit that rotates a fan, and a casing that is mounted on the printed circuit board, houses the fan and the motor unit, has an intake port in the rotation axis direction of the fan, and has an exhaust port in the radial direction of the fan And a fan device that blows air sucked from the intake port to the exhaust port by rotating the fan, wherein a part of the casing is disposed inward of the other outer surface portion of the casing And formed as a motor mounting portion for mounting the motor means.

  In the present invention, the motor means includes a control electronic component that controls rotation of the fan and a control board on which the control electronic component is mounted, and the motor mounting portion includes a plurality of notches or penetrating portions. A hole is provided, and the control electronic component of the control board is arranged in the vicinity of the notch or the through hole.

  Further, the present invention is characterized in that the motor means includes a control electronic component for controlling rotation of the fan and a control board for mounting the control electronic component, and a heat radiating member is provided in the motor mounting portion. It is what.

  Further, the present invention is characterized in that the motor means is fixed to the motor mounting portion via a support member, and the support member is formed of a material containing aluminum or an aluminum alloy. is there.

  Further, the present invention is characterized in that the casing includes a groove portion for storing a part of the wiring taken out from the control board to the outside of the casing.

  According to the present invention, since the motor mounting portion is disposed inward from the other outer surface portion of the casing, a sufficient air passage space can be secured below the motor mounting portion as compared with the conventional case, and the size is small. A high-performance fan device can be provided.

  In addition, according to the present invention, the intake air that has passed through the notch or the through hole can easily hit the control electronic component of the control board, and heat dissipation of the control electronic component can be further promoted. Further, the intake air that has passed through the notch or the through hole can promote heat dissipation to other components of the motor means.

  Further, according to the present invention, the intake air from the intake port hits the heat radiating member, and the heat radiation of the motor means mounted on the motor mounting portion, particularly the heat radiation of the control electronic component can be promoted.

Further, according to the present invention, heat generated by the motor means can be easily conducted to the motor mounting portion via the support member, and heat dissipation from the motor mounting portion can be promoted.

  Further, according to the present invention, the wiring positioning work is facilitated, and the work is facilitated even when the wiring accommodated in the groove is fixed, so that the assembly of the apparatus is improved.

1 is a cross-sectional view showing a fan apparatus according to Embodiment 1 of the present invention. FIG. 2 is a bottom view showing the fan device. FIG. 3 is a plan view showing the inside of the fan device. FIG. 4 is a cross-sectional view showing the vicinity of the cable fixing portion. FIG. 5 is a cross-sectional view showing the cable fixing portion in the BB cross section of FIG. 4. FIG. 6 is a cross-sectional view showing a fan device according to Embodiment 2 of the present invention. FIG. 7 is a sectional view showing a fan apparatus according to Embodiment 3 of the present invention. FIG. 8 is a bottom view showing the fan device. FIG. 9 is a bottom view showing a motor mounting portion provided with a number of round holes. 10 is a cross-sectional view showing a fan apparatus according to Embodiment 4 of the present invention. FIG. 11 is a bottom view showing the fan device. FIG. 12 is a cross-sectional view showing a conventional fan device. FIG. 13 is a bottom view showing a conventional fan device. FIG. 14 is a cross-sectional view showing the vicinity of the cable fixing portion. 15 is a cross-sectional view showing the cable fixing portion in the EE cross section of FIG.

  Embodiments of a fan device according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In the following description, the same or equivalent members as those already described are denoted by the same reference numerals, and redundant description is omitted or simplified.

  1 is a cross-sectional view showing a fan apparatus according to Embodiment 1 of the present invention, and is a cross-sectional view taken along the line AA of FIG. 2 is a bottom view showing the fan device, FIG. 3 is a plan view showing the inside of the fan device, FIG. 4 is a cross-sectional view showing the vicinity of the cable fixing portion, and FIG. 5 is a cross-sectional view taken along line BB in FIG. It is sectional drawing which shows the cable fixing | fixed part in.

  In addition, the arrow which attached | subjected the code | symbol F in a figure typically shows the flow of air. Also, the black arrows in FIG. 3 indicate the rotation direction of the fan 13 to be described later.

  As shown in FIGS. 1 to 4, the centrifugal fan device 10 includes a fan 13 having a plurality of blades 12 at the peripheral edge of the rotor portion 11 and a coaxial arrangement inside the rotor portion 11. A casing 20 having a motor unit 15 for rotating the motor 13, a fan 13 and a motor unit 15, and having an intake port 16, 17 in the rotational axis direction of the fan 13 and an exhaust port 18 in the radial direction of the fan 13; The air sucked from the intake ports 16 and 17 is blown to the exhaust port 18 by rotating the fan 13.

  The rotor portion 11 of the fan 13 is formed in a cylindrical shape including a top surface portion 11a and a side surface portion 11b. The rotor portion 11 and the blades 12 provided on the side surface portion 11b are integrally formed of synthetic resin, for example.

  Moreover, although the casing 20 is formed, for example with aluminum, its alloy, etc., it can also be formed with a synthetic resin.

  Further, the control board 27 is fixed to the support member 24 so that the mounting surface of the control IC 26 faces downward so that the air sucked from the air inlet 17 strikes the control IC 26 and is easily dissipated.

  The support member 24 is formed of a material having high thermal conductivity such as aluminum or an alloy thereof. As a result, frictional heat of the bearing 23 generated by the rotation of the fan 13, heat of the control IC 26 transmitted through the control board 27, heat generated in the coil 25, and the like are transmitted to the motor mounting unit 30 through the support member 24. It is easy to conduct and dissipate heat and to be easily cooled by the air drawn from the air inlet 17.

  Further, the motor mounting portion 30 is formed to mount the motor means 15 by disposing a part of the bottom surface of the casing 20 in the vicinity of the air inlet 17 inward of the other outer surface portion 21 of the casing 20. Is. Further, the motor mounting portion 30 is connected to the opening peripheral portion of the air inlet 17 by three to four ribs 31. In the first embodiment, the ribs 31 are arranged radially, but the arrangement is not limited to this.

  By forming the motor mounting portion 30 in this manner, the air passage space can be secured below the motor mounting portion 30 as compared with the conventional one, and the amount of air supplied to the motor means 15 is increased, so that the cooling efficiency of the motor means 15 is improved. can do.

  Therefore, the allowable temperature of the motor unit 15 can be afforded and the rotation speed of the motor unit 15 can be increased, so that the air volume of the fan device 10 can be increased.

  In addition, by forming the motor mounting portion 30 as described above, an air passage space can be secured below the motor mounting portion 30 as compared with the conventional case, so that the mounting area of components (not shown) arranged on the printed circuit board 42 is expanded. The degree of freedom of design layout can be increased.

  As shown in FIGS. 2, 4, and 5, the casing 20 includes a groove portion 50 for storing a part of a cable (wiring) 40 that is taken out from the control board 27 to the outside of the casing 20. That is, a part of the cable 40 is fitted and accommodated in the groove 50 and fixed with an adhesive tape or an adhesive.

  As a result, the positioning operation of the cable 40 at the attachment position is facilitated, and the operation is facilitated even when the cable 40 accommodated in the groove 50 is bonded and fixed, so that the assembly of the apparatus is improved.

  In addition, since the cable 40 can be prevented from being bent by fixing the cable 40 as described above, the bent cable 40 comes into contact with the rotating fan 13 and the insulation coating of the cable 40 is damaged. Or disconnection can be suppressed.

  As described above, according to the fan device 10 according to the first embodiment, since the motor mounting portion 3 is disposed inward of the other outer surface portion 21 of the casing 20, the motor mounting portion 30 is conventionally disposed below the motor mounting portion 30. As a result, a sufficiently large air passage space can be secured, and a small and high-performance fan device 10 can be provided.

  FIG. 6 is a cross-sectional view showing a fan device according to Embodiment 2 of the present invention. As shown in FIG. 6, the second embodiment is obtained by further reducing the height of the motor means 15 and the height of the rotor portion 11 in the configuration of the first embodiment.

  As described in the first embodiment, since the air passage space can be secured below the motor mounting portion 30 and the air volume supplied to the motor means 15 is increased, the cooling efficiency of the motor means 15 can be improved. I could do it. As a result, the allowable temperature of the motor means 15 can be afforded and the rotation speed of the motor means 15 can be increased, so that the air volume of the fan device 10 can be increased.

  Therefore, when trying to obtain the same air volume as before, the height of the motor means 15 and the height of the rotor part 11 can be made lower than before, so this embodiment 2 implements this and the fan 13 is an increase in the intake space of the upper intake port 16.

  As a result, the air volume from the intake port 16 increases as compared with the case of the first embodiment, and the cooling efficiency of the motor means 15 is further improved. Other configurations are the same as those in the first embodiment, and a duplicate description is omitted.

  As described above, according to the fan device 10 according to the second embodiment, in addition to the same effects as in the first embodiment, the air volume from the intake port 16 is further increased, and the cooling efficiency of the motor means 15 is increased. Further improvement can be achieved.

  FIG. 7 is a sectional view showing a fan apparatus according to Embodiment 3 of the present invention, and is a sectional view taken along the line CC of FIG. FIG. 8 is a bottom view showing the fan device.

  As shown in FIGS. 7 and 8, in the third embodiment, in the configuration shown in the second embodiment, a plurality of (for example, four) rectangles are provided in the motor mounting portion 30 so that the intake air can easily pass therethrough. The slit (notch part) 60 is provided.

  Further, the control IC 26 of the control board 27 is arranged in the vicinity of the slit 60 so that the intake air passing through the slit 60 can be easily hit. Other configurations are the same as those in the second embodiment, and a duplicate description is omitted.

  As described above, according to the fan device 10 according to the third embodiment, in addition to the same effects as in the second embodiment, the intake air that has passed through the slit 60 easily hits the control IC 26 of the control board 27. The heat dissipation of the control IC 26 can be further promoted. Further, the intake air that has passed through the slit 60 can promote heat dissipation to the bearing 23 and the coil 25.

  In the third embodiment, the description has been given assuming that four rectangular slits 60 are provided. However, the present invention is not limited to this. For example, as shown in FIG. 9, a large number of round holes (through holes) 62 are provided. Also good. In this case, the same effect as in the third embodiment can be expected. Here, FIG. 9 is a bottom view showing the motor mounting portion provided with a number of round holes.

  FIG. 10 is a sectional view showing a fan device according to Embodiment 4 of the present invention, and FIG. 11 is a bottom view showing the fan device. As shown in FIGS. 10 and 11, in the fourth embodiment, a heat sink (heat radiating member) 70 is provided on the back surface of the motor mounting portion 30 in the configuration shown in the second embodiment.

  Further, as described above, the control board 27 on which the control IC 26 is mounted is disposed in the vicinity of the motor mounting portion 30 via the support member 24 having good thermal conductivity. Other configurations are the same as those in the second embodiment, and a duplicate description is omitted.

  As described above, according to the fan device 10 according to the fourth embodiment, the same effect as in the second embodiment is obtained, and the intake air from the intake port 17 hits the heat sink 70 and is supported together with the motor mounting portion 30. Since the member 24 is dissipated, the control IC 26 of the control board 27 can be dissipated through the support member 24.

  Further, heat dissipation can be promoted to the bearing 23 and the coil 25 which are constituent members of the motor means 15 via the support member 24.

  Further, by using the heat sink 70 which is a general heat radiating member, the heat radiating structure of the motor means 15 can be constructed at a low cost.

  In the fourth embodiment, the heat sink 70 is provided as the heat radiating member. However, the heat radiating member is not limited to this. For example, a general heat radiating member such as a lid or a heat spreader may be used. Also in this case, the same effect as in the fourth embodiment can be expected.

  Moreover, in the said Examples 1-4, although demonstrated as what provided the inlet 16 in the casing 20, if a predetermined amount of intake air can be ensured, it will not be limited to this, For example, even if only the inlet 17 is provided. Good.

  Moreover, in the said Examples 1-4, although demonstrated as what fixes the supporting member 24 to which the control board 27 was fixed to the motor mounting part 30, it is not limited to this, A control board is not interposed via the supporting member 24 27 may be directly fixed to the motor mounting portion 30.

  Moreover, in the said Examples 1-4, although demonstrated as providing the three ribs 31, if a predetermined rigidity thru | or intensity | strength is ensured and the influence of intake air resistance can be considered, it will not be limited to this, The number of ribs 31 may be increased or decreased.

(Appendix 1) A fan having a plurality of blades on the peripheral edge of the rotor portion;
Motor means arranged coaxially inside the rotor portion to rotate the fan;
A casing that houses the fan and the motor means, has an air inlet in the rotational axis direction of the fan, and has an air outlet in the radial direction of the fan;
With
In the fan device that blows air sucked from the intake port to the exhaust port by rotating the fan,
A fan device characterized in that a part of the casing in the vicinity of the air inlet is disposed inward of the other outer surface portion of the casing and is formed as a motor mounting portion for mounting the motor means.

(Appendix 2) The motor means includes a control electronic component for controlling rotation of the fan and a control board for mounting the control electronic component,
The motor mounting portion includes a plurality of cutout portions or through holes, and the control electronic component of the control board is disposed in the vicinity of the cutout portion or the through hole. Fan device.

(Appendix 3) The motor means includes a control electronic component for controlling rotation of the fan and a control board for mounting the control electronic component,
The fan device according to appendix 1, wherein a heat radiating member is provided in the motor mounting portion.

(Additional remark 4) The said motor means is being fixed to the said motor mounting part via the supporting member, The said supporting member is formed with the material with high heat conductivity, The additional remark 2 or 3 characterized by the above-mentioned. The fan device as described.

(Additional remark 5) The said casing was provided with the groove part for accommodating a part of wiring taken out from the said control board to the exterior of the said casing, The fan apparatus of Additional remark 4 characterized by the above-mentioned.

(Additional remark 6) The said heat radiating member is any one of a heat sink, a lid, and a heat spreader, The fan apparatus of Additional remark 3 characterized by the above-mentioned.

  As described above, the fan device according to the present invention has a high degree of freedom in design layout, is useful for a small and high-performance fan device, and is particularly suitable for personal computers and server devices.

DESCRIPTION OF SYMBOLS 10 Fan apparatus 11 Rotor part 11a Top surface part 11b Side surface part 12 Blade | blade 13 Fan 14 Rotating shaft (motor means)
DESCRIPTION OF SYMBOLS 15 Motor means 16, 17 Intake port 18 Exhaust port 20 Casing 20a Hole 21 Other outer surface part 22 Magnet (motor means)
23 Bearing (motor means)
24 Support member (motor means)
25 Coil (motor means)
26 Control IC (Control electronics)
27 Control board 30 Motor mounting part 31 Rib 40 Cable (wiring)
41 Connector 42 Printed Circuit Board 50 Groove 60 Slit (Notch)
62 Round hole (through hole)
70 Heat sink (heat dissipation member)
F Air flow

Claims (3)

A printed circuit board,
A fan having a plurality of blades having an outer peripheral region and an inner peripheral region whose dimension in the direction of the rotation axis is shorter than the outer peripheral region at the peripheral portion of the rotor portion;
Motor means arranged coaxially inside the rotor portion to rotate the fan;
A casing mounted on the printed circuit board, housing the fan and the motor means, having an intake port in the direction of the rotation axis of the fan and having an exhaust port in the radial direction of the fan;
With
A fan device, wherein a part of the casing is disposed inward than the other outer surface portion of the casing that covers the outer peripheral area of the blade, and serves as a motor mounting portion for mounting the motor means. . The motor means includes a control electronic component that controls rotation of the fan and a control board on which the control electronic component is mounted,
The said motor mounting part is provided with the some notch part or through-hole, and has arrange | positioned the said control electronic component of the said control board in the vicinity of the said notch part or the said through-hole. Fan device. The motor means includes a control electronic component that controls rotation of the fan and a control board on which the control electronic component is mounted,
The fan device according to claim 1, wherein a heat radiating member is provided in the motor mounting portion.

Images