JP2001099096A - Fan motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the capacity characteristic and the noise restricting performance even in the case where an air suction direction and an air discharge direction are different from each other. SOLUTION: The air sucked into a machine body 1 through a suction port 5 is discharged from plural discharge ports 6, 7 provided in the direction different from the suction port 5. The discharge ports 6, 7 are provided at plural positions so as to increase the discharge capacity, and with this structure, the air can easily flow inside the machine body 1. A capacity characteristic as a fan motor is improved, and while the noise to be generated when sucking the air can be restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan motor for discharging air taken from a suction port through an exhaust port in a direction different from the direction of the suction port.

[0002]

Conventionally, a fan motor used for cooling the inside of a housing of a notebook personal computer (hereinafter referred to as a notebook personal computer) is shown in FIG. It had a flat appearance as shown in the figure. In FIG. 16, reference numeral 1 denotes a flat box-shaped body forming an outer shell of the fan motor, which is a bottomed case 2 forming side and bottom surfaces of the body 1 and a plate-shaped body covering an upper opening of the case 2. And the cover 3. A motor-driven fan 4 is rotatably supported inside the body 1, and a cover 3 on the upper surface of the body 1 facing the upper surface of the fan 4 applies air around the fan motor to the cover 3. A suction port 5 for taking in the inside is formed in a substantially circular opening. On the other hand, one side of the fuselage 1
An exhaust port 6 for discharging air to the outside is formed in a rectangular shape. When the fan 4 is rotated by the drive of a motor (not shown), air is taken in from the suction port 5 on the upper surface of the body 1, and the exhaust port 6 is opened in a direction different from the suction port 5 by 90 °. Air is exhausted.

[0003] In the above-described conventional fan motor,
Since the suction direction Ain and the discharge direction Aout of the air are different, the air does not flow smoothly inside the body 1. Therefore, the loss of air inside the airframe 1 was large, the amount of exhaust air was small, and the efficiency (air volume characteristics) of the fan motor was poor. Further, since the body 1 is flat, even if the exhaust port 6 is formed substantially over one side surface of the body 1, the opening area of the exhaust port 6 is smaller than the opening area of the suction port 5, so that the suction port is formed. All the air could not be exhausted, which significantly reduced the noise performance at the intake.

An object of the present invention is to provide a fan motor capable of improving air volume characteristics and noise performance even when air suction and discharge directions are different. I do.

[0005]

According to the first aspect of the present invention, air sucked into the body through the suction port is discharged from a plurality of exhaust ports in directions different from the suction port. If the intake and exhaust ports are arranged in different directions, it will be difficult for air to flow smoothly inside the fuselage.However, by providing exhaust ports at multiple locations and increasing the exhaust air volume, it is difficult to Can be corrected. Therefore, it is possible to improve the air volume characteristics of the fan motor and at the same time to improve the noise performance when sucking air.

According to the fan motor of the second aspect of the present invention, if the opening areas of the respective exhaust ports are different, it is possible to exhaust air from the individual exhaust ports with a preferable air volume.

According to the fan motor of the third aspect of the present invention, for example, one of the exhaust ports is used as an air discharging function,
The other exhaust port can be used for local cooling of the heating element around the fan motor, and the usability of the fan motor can be improved.

According to the fan motor of the fourth aspect of the present invention, since the exhaust port is provided at a plurality of locations on the body, even if the opening area of the exhaust port cannot be sufficiently secured, the noise performance is improved to some extent. It becomes possible.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the fan motor according to the present invention will be described with reference to the accompanying drawings. In each of these embodiments, the same reference numerals are given to the same parts as those in the conventional example, and the common description is omitted because it is the same as the conventional example.

FIG. 1 is an overall perspective view of a fan motor showing a first embodiment of the present invention. In this figure, in the present embodiment, among the four side surfaces of the fuselage 1, one side is provided with an exhaust port 6 having the same opening area as the conventional example, while another side surface on the opposite side is provided. , An exhaust port 7 having an opening area smaller than that of the exhaust port 6 is provided. That is, each of the exhaust ports 6 and 7 is formed with an opening in a direction different from the intake port 5 by 90 °, and is provided at a plurality of locations on the side surface of the machine body 1. Other configurations are common to those of the conventional fan motor.

Then, as the fan 4 rotates,
The air sucked into the body 1 along the suction direction Ain from the suction port 5 on the upper surface of the body 1 hits the bottom surface of the case 2 and is blocked in a downward flow, and then spreads in the side direction of the body 1. Try to proceed. At this time, since another exhaust port 7 is provided in addition to the exhaust port 6 on the side surface in the peripheral direction of the body 1, exhaust is performed from the two exhaust ports 6 and the exhaust port 7 along the exhaust direction Aout. Is done. Since the exhaust air volume from the airframe 1 is increased by the amount of the exhaust port 7, even if the air intake direction Ain and the air exhaust direction Aout are structurally different, it is possible to improve the air volume characteristics as a fan motor to some extent. it can. In addition, an increase in the amount of exhaust from the airframe 1 improves noise performance when air is sucked.

FIG. 2 shows an example in which the fan motor shown in FIG. 1 is incorporated in a notebook personal computer. In the figure, reference numeral 11 denotes the fan motor shown in FIG. 1, and reference numeral 12 denotes a notebook personal computer.
It is generally composed of a bottomed housing 14 having a keyboard 13 on the upper surface, and an openable and closable liquid crystal display unit 15 covering the upper surface of the keyboard 13. The fan motor 11 is provided at a predetermined position inside the housing 14 such that the exhaust port 6 faces an exhaust hole 16 provided on one side of the housing 14. At this time, another exhaust port 7 provided on the side surface of the body 1 is disposed near a heating element 17 such as an MPU (microprocessor unit).

The housing 14 heated by the heating element 17
The internal air is sucked into the body 1 from the suction port 5 by the rotation of the fan 4, and is discharged from the two exhaust ports 6 and 7 provided on the side surface of the body 1 in different discharge directions Aout. The air from the exhaust port 6 passes through the exhaust hole 16 of the housing 14 and is discharged to the outside of the housing 14. Further, the air discharged from the exhaust port 7 can be directly blown to the heating element 17 and used for local cooling of the heating element 17.

As described above, in this embodiment, in the fan motor 11 in which the suction port 5 and the exhaust ports 6 and 7 are arranged in different directions of the body 1, the exhaust ports 6 and 7 are provided at a plurality of locations of the body 1. ing. In this way, the air sucked into the machine body 1 from the suction port 5 is discharged from the plurality of exhaust ports 6 and 7 located in different directions from the suction port 5. If the suction port 5 and the exhaust ports 6 and 7 are arranged in different directions, it becomes difficult for air to flow smoothly inside the body 1,
By increasing the exhaust air flow rate by providing a plurality of air outlets 7, it is possible to correct such difficulty in air flow. Therefore, the air volume characteristics of the fan motor 11 can be improved, and at the same time, the noise performance when air is sucked can be improved.

In the case where the airframe 1 is made of metal having excellent heat conductivity in consideration of heat radiation, if the exhaust ports 6 and 7 are provided at a plurality of locations of the airframe 1, only that much is provided. There is also an advantage that the weight of the fan motor 11 can be reduced.

Further, in this embodiment, the opening areas of the exhaust ports 6 and 7 provided at a plurality of positions of the body 1 are not the same but are different from each other. As described above, when the opening areas of the exhaust ports 6 and 7 are different, it is possible to exhaust air from the individual exhaust ports 6 and 7 with a preferable air volume.

Further, as shown in FIG. 2, if the exhaust ports 6 and 7 at a plurality of locations can be exhausted in different directions, for example, one exhaust port 6 is used as an air exhaust function and the other exhaust port 6 is used as an air exhaust function. The exhaust port 7 can be used for local cooling of the heating element 17 around the fan motor 11, and the usability of the fan motor 11 can be improved.

In the present embodiment, it is preferable that the entire opening area of the exhaust ports 6 and 7 is larger than the opening area of the intake port 5 because all the sucked air can be exhausted, but the body 1 becomes flat. Accordingly, even if the exhaust ports 6 and 7 are provided at a plurality of locations on the body 1, the entire opening area of the exhaust ports 6 and 7 is structurally smaller than the opening area of the suction port 5. But,
If the exhaust ports 6 and 7 are provided at a plurality of locations of the body 1 as in the present embodiment, noise performance can be improved to some extent even if the opening areas of the exhaust ports 6 and 7 cannot be sufficiently secured. Becomes

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, in addition to the exhaust ports 6 and 7 in the first embodiment, other exhaust ports 8 and 9 are provided on the other side surface of the body 1, respectively. As described above, since the exhaust ports 6 to 9 are provided at a plurality of positions of the body 1, even if the suction port 5 and the exhaust ports 6 to 9 are arranged in different directions, the air flow inside the body 1 is restricted. I can correct it. Therefore, it is possible to improve the air volume characteristics of the fan motor and at the same time to improve the noise performance when sucking air.

In particular, in this embodiment, since the exhaust ports 6 to 9 are provided on all four side surfaces of the body 1 having a rectangular shape, air is exhausted from almost all directions of the side surfaces of the body 1, and the air volume characteristic is improved. And noise performance is further improved. In this case, even if the body 1 is not rectangular, the same operation and effect can be exerted if the exhaust ports are formed at a plurality of locations over the entire circumference of the side surface of the body 1.

In the third embodiment shown in FIG.
An upward tapered surface 19 is formed from the bottom surface of the case 2 toward the exhaust port 7. By doing so, the direction Aout of discharging air from the outlet 7 changes upward along the tapered surface 19, so that the direction Aout of discharging air from the outlet 7 with respect to the direction Aout discharging from the outlet 6. It is possible to aim at different angles.

As described in the conventional example, the conventional flat fan motor has a structure in which air is taken in from the intake port 5 on the upper surface of the body 1 and exhausted from the exhaust port 6 on the side surface of the body 1. And the air flow can be changed by 90 ° inside the airframe 1, so that the blowing efficiency is poor. In other words, if air was originally drawn from one side of the body 1 and exhausted to the other side of the body 1, the air flow would be smoothest and excellent air blowing efficiency would be obtained. In such a fan motor, the intake area on the side surface of the body 1 is narrow, and the air blowing efficiency is deteriorated. Therefore, in the structure of the fan motor as shown in FIG. 16, the sucked air collides with the bottom surface of the case 2, and smooth exhaust is not performed. In addition, since the inhaled air hits the bottom surface of the case 2 and is sent to the exhaust port 6, there is a disadvantage that the air pressure is not sufficient. This is also due to the fact that the fan blades inside the fuselage 1 have only an intake function and no exhaust function.

In consideration of such circumstances, in the fourth to eighth embodiments of the present invention, a structure in which a fan blade also has an exhaust function is specifically presented.

In the fourth embodiment shown in FIGS. 5 to 7, the fan 4 located above the case 2 is provided with a rotor 21 as a rotor at the center and radially from a cylindrical side face 22 of the rotor 21. Extending to multiple fan blades
23 are arranged at equal intervals. The rotor 21 is formed in a cup shape, and a permanent magnet (not shown) is disposed inside the rotor 21. A motor unit 24 held by the case 2 is provided to face the permanent magnet. Further, the blowing direction F in which the fan 4 rotates is oriented in the horizontal direction along the cylindrical side surface 22 of the rotor 21. The fan blade 23 has an inner peripheral side portion 25 attached to the cylindrical side surface 22 of the rotor 21 at a predetermined angle with respect to the blowing direction F, and a radially outer side of the inner peripheral side portion 25, and And an outer peripheral side portion 26 having a portion substantially perpendicular to F. In this embodiment, the shape is such that the angle with respect to the blowing direction F gradually changes to a right angle from the inner peripheral side portion 25 to the outer peripheral side portion 26.

In this embodiment, when the fan 4 rotates in the blowing direction F by energizing the motor unit 24, the blowing direction F
Inner side of fan blade 23 with an angle of inclination
25 takes in air from the suction port 5 from above the fan 4. The air taken into the inner peripheral side portion 25 of the fan blade 23 moves while gradually changing its flow along the outer peripheral side portion 26 of the fan blade 23 without substantially hitting the bottom surface of the case 2. The air is discharged from the front end of the nozzle 26 in the direction substantially the same as the blowing direction F. Then, the air is smoothly discharged from the exhaust port 6 formed in this direction and the other exhaust ports 7 to 9.

As described above, in this embodiment, the rotatable fan blade 23 provided inside the body 1 and attached at an arbitrary angle with respect to the blowing direction F is provided from the inner peripheral side to the outer peripheral side. It has such a shape that the angle with respect to the blowing direction F changes to a substantially right angle as it goes to the side.
In this way, the inner peripheral side portion 25 of the fan blade 23 acts as an air intake function, and the outer peripheral side portion 26 of the fan blade 23 acts as an exhaust function, so that when air passes through the fan blade 23, Since the air can be directed in the blowing direction F, the flow of air inside the airframe 1 becomes smooth, and the exhaust efficiency is improved. Therefore, Aircraft 1
It is possible to reduce windage loss inside the vehicle and improve noise performance. In addition, since the fan blade 23 has both an intake function and an exhaust function, it is possible to provide a sufficient wind pressure. Furthermore, since the fan blade 23 itself can be formed by integral molding as in the related art, it is possible to suppress an increase in cost while improving the performance as a fan motor.

FIGS. 8 to 10 show a fifth embodiment of the present invention. In the fifth embodiment, the blowing direction F
The inner peripheral side portion 25 attached to the cylindrical side surface 22 of the rotor 21 at a predetermined angle with respect to
, And an outer peripheral side portion 26 having a portion substantially perpendicular to the blowing direction F is formed from the outer side. In other words, the fan blade 23 of the fourth embodiment has such a shape that the angle with respect to the blowing direction F gradually changes to a right angle from the inner peripheral side portion 25 to the outer peripheral side portion 26,
In this embodiment, the inner peripheral side part 25 and the outer peripheral side part
26 are clearly distinguished.

The fan blade 23 of the present embodiment has a shape in which the angle with respect to the air blowing direction F changes at a right angle from an arbitrary distance R from the inner peripheral side to the outer peripheral side. Also in this case, the air flow is the same as in the fourth embodiment, and the inner peripheral side portion 25 of the fan blade 23 functions as an air intake function, and the outer peripheral side portion 26 of the fan blade 23 functions as an exhaust function. And the air is a fan blade
Since the flow can be directed in the blowing direction F when passing through the airbag 23, the flow of air inside the body 1 becomes smooth, and the exhaust efficiency is improved. Therefore, it is possible to reduce windage loss inside the airframe 1 and improve noise performance. In addition, since the fan blade 23 has both an intake function and an exhaust function, it is possible to provide a sufficient wind pressure. Further, since the fan blade 23 itself can be formed by integral molding as in the related art, it is possible to suppress an increase in cost while improving the performance as a fan motor.

FIGS. 11 and 12 show a sixth embodiment of the present invention. In the sixth embodiment, the cylindrical side surface 22 of the rotor 21 is formed at a predetermined angle with respect to the blowing direction F.
An inner peripheral side portion 25 attached to the air inlet 5 is formed to face the air inlet 5, and an outer peripheral side portion 26 having a portion substantially perpendicular to the blowing direction F is formed outward from the inner peripheral side portion 25. This outer peripheral side 26
Is surrounded by a portion surrounded by the cover 2 and the case 3 and, unlike the inner peripheral side portion 25, does not have an air intake function.
That is, in the sixth embodiment, the inner peripheral side portion 25 facing the intake port 5 is a suction portion of the fan blade 23, and the outer peripheral side portion 26 surrounded by the body 1 other than the suction portion is the exhaust portion of the fan blade 23. It has become. In this way, air is not unnecessarily sucked from the outer peripheral side portion 26 of the fan blade 23, and the fan blade 23 can serve both the intake and exhaust functions. Becomes possible.

FIG. 13 shows a seventh embodiment of the present invention. The difference between the seventh embodiment and the sixth embodiment is that a cylindrical portion 31 is formed below the periphery of the intake port 5 of the cover 3 for efficiently guiding the sucked air to the fan 4 side. The height Z of the outer peripheral portion 26 is smaller than the height Y of the inner peripheral portion 25 so that the fan blade 23 does not hit the cylindrical portion 31. That is, the upper surface of the outer peripheral side portion 26 facing the lower end of the cylindrical portion 31 is lower than the upper surface of the inner peripheral side portion 25 so as not to contact the cylindrical portion 31.
In this way, the fan 4 including the fan blade 23 is rotatably housed below the cover 3 in combination with the effect of providing the inner peripheral side portion 25 and the outer peripheral side portion 26 on the fan blade 23. Becomes possible.

In the fourth to seventh embodiments, the outer peripheral side portion 26 of the fan blade 23 is most preferably arranged at right angles to the blowing direction F. If the inclination is not less than 0 °, the outer peripheral side portion 26 can change the air flow in the blowing direction F.

FIGS. 14 and 15 show an eighth embodiment of the present invention. In the eighth embodiment, a sirocco fan 37 having a plurality of fan blades 35 is provided along the axial direction of the fan 4 instead of the outer peripheral side portion 26. The sirocco fan 37 is provided so as to surround the outside of the inner peripheral side portion 25, and the air sucked from above the fan 4 by the inner peripheral side portion 25 in the blowing direction F without hitting the bottom surface of the case 2. It has a directing action. Therefore, the fourth
As with the inner peripheral side portion 25 and the outer peripheral side portion 26 of the fan blade 23 in the seventh to seventh embodiments, it is possible to reduce windage loss inside the body 1 and improve noise performance. In addition, since the fan blade 23 has both an intake function and an exhaust function, it is possible to provide a sufficient wind pressure.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be made.

[0034]

According to the fan motor of the first aspect of the present invention, it is possible to improve the air volume characteristics and the noise performance even when the air suction direction and the air discharge direction are different.

According to the fan motor of the second aspect of the present invention, it is possible to exhaust air from each exhaust port with a preferable air volume.

According to the fan motor of the third aspect of the present invention, the air from each exhaust port is used for different purposes, so that the usability as a fan motor can be improved.

According to the fan motor of the fourth aspect of the present invention, the noise performance can be improved to some extent even if the opening area of the exhaust port cannot be sufficiently secured.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a fan motor according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view showing the same fan motor incorporated in a notebook computer.

FIG. 3 is an overall perspective view of a fan motor according to a second embodiment of the present invention.

FIG. 4 is an overall sectional view of a fan motor according to a third embodiment of the present invention.

FIG. 5 is a perspective view of a fan and its periphery according to a fourth embodiment of the present invention.

FIG. 6 is a sectional view taken along the line a-a ′ in FIG. 5;

FIG. 7 is a sectional view taken along the line b-b ′ in FIG. 5;

FIG. 8 is a perspective view of a fan according to a fifth embodiment of the present invention.

FIG. 9 is a sectional view taken along line a-a ′ in FIG. 8;

FIG. 10 is a sectional view taken along line b-b ′ in FIG. 8;

FIG. 11 is an overall perspective view of a fan motor according to a sixth embodiment of the present invention.

FIG. 12 is a sectional view taken along the line cc ′ in FIG. 11;

FIG. 13 is a sectional view of a fan motor according to a seventh embodiment of the present invention.

FIG. 14 is a perspective view of a fan according to an eighth embodiment of the present invention.

FIG. 15 is a front view of a main part of the above.

FIG. 16 is an overall perspective view of a fan motor showing a conventional example.

[Explanation of symbols]

 1 Aircraft 5 Suction port 6-9 Exhaust port

Claims (4)

[Claims] 1. A fan motor having a suction port and an exhaust port arranged in different directions of a body, wherein the exhaust ports are provided at a plurality of positions on the body. 2. The fan motor according to claim 1, wherein the plurality of exhaust ports have different opening areas. 3. The fan motor according to claim 1, wherein the plurality of exhaust ports can exhaust air in different directions. 4. The fan motor according to claim 1, wherein the opening areas of the plurality of exhaust ports are smaller than the opening areas of the suction ports.