JP3102577U - Fan device - Google Patents

Abstract

An object of the present invention is to provide a fan device capable of inhaling air from an axial direction and then carrying the air in a tangential direction of rotation without interference of back pressure, and improving a cooling effect by increasing an exhaust amount. .
A housing having an air inlet and an air outlet, and a housing accommodated in the housing, wherein the air sucked in the axial direction of the rotation axis from the air inlet flows in a direction perpendicular to the rotation axis to the discharge port. A fan device provided with an impeller for discharging air from the hub, the impeller includes a hub attached to a drive shaft of a motor, a plurality of blade plates disposed around the hub, and A plurality of support arms that are respectively extended outward at equal intervals in the direction to support the blade plate, and are located between the blade plates so that the flow of the sucked air changes in a direction perpendicular to the rotation axis. And a guide portion for guiding the sucked air.
[Selection diagram] FIG.

Description

  The present invention relates to a fan device, and more particularly, to a fan device that draws air from an axial direction of rotation and carries the air in a tangential direction of rotation.

Conventionally, there is a fan device called a cooling fan device or a heat dissipating fan device that is mounted on a computer together with a motor, drives a fan, guides heat generated by electronic components in the computer to the outside, dissipates the heat, and cools the computer. . As shown in FIG. 1, this type of fan device includes an impeller 12, a board 111 serving as a pedestal for pivotally supporting the impeller 12, and a cover installed on the board 111 and surrounding the impeller 12. A housing that is rotatably housed in a housing 11 including a housing 112 is known. A suction port 113 is provided on one side of the cover 112 which is a side surface of the rotation surface, and an outlet port 114 is formed at a position which is tangential to the rotation. As shown in FIGS. 2 and 3, the impeller 12 includes a hub 121, a plurality of support arms 122 extending outward from an outer peripheral edge of the hub 121, and tips of the plurality of support arms 122. A support ring 123 extending between the support rings and supported by them at the same time, and a plurality of support rings 123 extending in the same direction parallel to the axial direction of the impeller 12 at equal intervals from the support ring 123. A blade plate 124 and a blade plate holding ring 125 that surrounds and holds one ends of the plurality of blade plates 124 that are away from the support ring 123 from outside are provided. During the operation of the fan device 1, the rotation of the impeller 12 causes air to be sucked from the suction port 113 along the rotation axis direction of the impeller 12, and then the air is passed through the plurality of impellers 124. It is carried to the outlet 114 in one tangential direction. As a result, heat generated in the computer can be led to the outside, dissipated, and cooled.
However, in the fan device 1 having such a structure, the air sucked in the axial direction by the rotation of the impeller 12 during operation is guided to the plurality of blade plates 124, turned in the radial direction, and then discharged in the tangential direction. However, since the turning efficiency is poor and most of the air hits the substrate 111 and turns suddenly in the radial direction to generate a back pressure, the air flow is disturbed and the air cannot be discharged smoothly. Wind pressure is reduced and the cooling effect is not as expected. Further, as described above, the blade plate holding ring 125 is provided on the outer periphery of one end of the plurality of blade plates 124 which is away from the support ring 123, so that the air flow turned in the radial direction is generated by the blade plates 124. When the fluid flows out between the blades, the blades are hindered by the blade retaining ring 125 and cannot be efficiently discharged to the outside.

  In view of the above, an object of the present invention is to allow air to be sucked in from the rotation axis direction and then to be smoothly carried in a direction perpendicular to the rotation axis due to a small back pressure interference. An object is to provide a fan device capable of improving a cooling effect.

  In order to achieve the above object, the present invention provides a housing having an air inlet and an air outlet, and air contained in the housing and sucked in the axial direction of the rotary shaft from the inlet at a right angle to the rotary shaft. Impeller for flowing in the direction of and discharging from the discharge port, wherein the impeller has a hub attached to a drive shaft of a motor and a plurality of hubs arranged around the hub. A blade, a plurality of support arms each extending outwardly at equal intervals in the circumferential direction from the hub to support the blade, and positioned between the blades; And a guide portion for guiding the air sucked so as to change in a direction perpendicular to the fan device.

  The fan device having the above structure includes a guide portion that is located between the blade plates and guides the sucked air so that the flow of the sucked air changes in a direction perpendicular to the rotation axis. Inhaled air can be smoothly led out through them (hereinafter, referred to as an air flow turning effect). In particular, if the plurality of impellers are each extended in the rotational direction like a parabola when viewed from the axial direction of the impeller, the airflow turning effect is more excellent. In addition, if the support ring and the plurality of guide portions are integrated, not only does it function as a support ring but also is provided between the plurality of blade plates, so that it does not obstruct airflow. In addition, since it functions as a guide portion and can guide air from the axial direction without obstruction, the air flow turning effect is further improved and the back pressure can be effectively reduced.

Hereinafter, preferred embodiments of the present invention will be described in detail. In the following description, components having substantially the same function and configuration will be denoted by the same reference numerals, regardless of their size, and repeated description will be made only when necessary.
First, a preferred embodiment of the fan device of the present invention will be described with reference to FIGS. 4 to 7 (see FIG. 9 instead of FIG. 4). As shown in FIG. 4, the fan device of this embodiment includes an impeller 3 that draws air from the axial direction by rotation and carries the air in a tangential direction of rotation, and a housing 2 that surrounds the impeller 3. It becomes. The housing 2 has an air inlet 22 on one surface 21 which is a side surface of the rotation surface, and an air outlet 23 which is opened at one location which is tangential to the rotation and subsequently expanded. Are formed.
A plurality of support arms 32 extend outward at equal intervals in the circumferential direction from a hub 31 installed in the housing 2 and driven by a motor (not shown). A support ring 33 extends between the tips of the arms 32 so as to be supported by them. From the support ring 33, a plurality of blade plates 34 extend at equal intervals in both relative directions parallel to the axial direction. It is configured.

  As shown in FIGS. 5 and 6, each of the plurality of support arms 32 extends in a parabolic shape in the direction opposite to the rotation direction and in the direction of the suction port 22, but is not limited thereto. It may be stretched in a parabolic shape. Each of the plurality of blade plates 34 extends like a parabola in the rotation direction when viewed from the axial direction of the impeller 3, and as shown in FIG. The air suction port 22 is also held by a blade holding ring 35 extending between the other end edges of the edge near the side face 21 having the air inlet 22.

  The support ring 33 has an upper surface in the figure inclined from the inside of the ring to the outside of the ring, and a plurality of blade plates 34 from the edge near the side surface 21 where the air inlet 22 of the housing 2 is located to the other edge. It is located at about one-third of the length of the slat 34 as measured in the direction (see FIGS. 6 and 7), but is not limited thereto and can be changed as needed. Further, each of the plurality of blade plates 34 is, by the support ring 33, a first side 341 including the edge and a second side 342 opposite to the first side 341 and including the other edge. And divided into The first side 341 extends on the surface of the support ring 33 and then extends out of the ring, and the second side 342 continues from the extended edge of the first side 341 , Ie, the width of the first side 341 is larger than the width of the second side 342 (see the right side of FIG. 6). As shown in FIG. 7, a guide vane (an example of a guide portion) 331 that is obliquely lowered from the inside to the outside of the support ring 33 located between the plurality of blade plates 34 is formed. That is, the guide vanes 331 are located between the blade plates 34 of the support ring 33. Since all of the plurality of blade plates 34 extend in the rotation direction like a parabola, each of the guide vanes 331 of the support ring 33 faces the side surface 21 having the air suction port 22. The both sides of the surface extend along the paraboloid of the wing plate 34 on both sides, forming an arc-shaped slope. In light of the preamble, the slats 35 extend between the second sides of the slats 34.

  During operation of this fan device, as shown in the directions indicated by arrows in FIGS. 4 and 6, the rotation of the impeller 3 sucks air from the suction port 22 along the rotation axis direction, and then most of the plurality of guide vanes. With the guidance of 331, it can be smoothly led to the outlet 23. As a result, the back pressure caused by the inhaled air hitting the inner surface of the housing 2 is reduced, so that the air flow path can pass without interruption and the amount of exhaust air can be improved.

FIG. 8 shows the results obtained by comparing the wind pressure during operation of the fan device of the present invention with the conventional fan device. In the figure, the horizontal axis Q (CFM) shows the air blowing amount of the fan device, the vertical axis P (mmH ₂ O) shows the pressure of the blower. As can be seen from the drawing, since the fan device of the present invention has a higher airflow and a higher wind pressure than before, the turning of the airflow according to the present invention can be useful not only for increasing the exhaust amount but also for increasing the wind pressure.
FIG. 8 shows an embodiment of a fan device in which the shape of the housing 2 is changed.

According to the above structure, the present invention allows air to be drawn in from the axial direction, and then allows the airflow to flow smoothly as a diagonal flow through the guide portion. Therefore, it is possible to provide a fan device in which the wind pressure increases and the cooling effect can be improved.
The embodiments described above are intended only to clarify the technical contents of the present invention, and the present invention is not limited to such specific examples and is not interpreted in a narrow sense. Various modifications can be made within the spirit and scope of the claims.

Perspective view of a conventional fan device Top view of impeller in conventional fan device FIG. 2 is a longitudinal sectional configuration diagram of the impeller of FIG. 2. FIG. 3 is a perspective view of a preferred embodiment of the fan device of the present invention. Top view of the impeller in the embodiment. FIG. 5 is a longitudinal sectional configuration diagram of the impeller of FIG. 5. Perspective view of the impeller of FIG. Comparison diagram of the blowing effect during operation of the fan device of the present invention and the conventional fan device FIG. 3 is a perspective view of another embodiment of the fan device of the present invention.

Explanation of reference numerals

REFERENCE SIGNS LIST 1 conventional fan device 11 housing 111 substrate 112 cover 113 suction port 114 outlet port 12 impeller 121 hub 122 support arm 123 support ring 124 blade plate 125 blade plate holding ring 2 housing 21 one side surface 22 of housing 21 suction port 23 outlet 3 Impeller 31 Hub 32 Support arm 33 Support ring 331 Guide part 34 Blade plate 341 First side of blade plate 342 Second side of blade plate 35 Blade plate holding ring

Claims (8)

A housing having an air suction port and a discharge port; and a housing for housing air in the housing and flowing air in the axial direction of the rotation axis from the suction port in a direction perpendicular to the rotation axis to discharge the air from the discharge port. An impeller, and a fan device comprising:
The impeller is
A hub attached to the drive shaft of the motor,
A plurality of blades arranged around the hub,
A plurality of support arms that are extended outward at equal intervals in the circumferential direction from the hub to support the slats,
A fan unit that is located between the blade plates and guides the sucked air so that the flow of the sucked air changes in a direction perpendicular to the rotation axis. A support ring (first support ring) to which the plurality of blades are attached and which is supported by the plurality of support arms;
2. The fan device according to claim 1, wherein a portion of the plurality of blade plates near a side opposite to an air discharge side is fixed to the support ring. 3. The fan device according to claim 2, wherein a guide surface of the guide portion is inclined from inside to outside of the support ring. The fan device according to claim 2, wherein the support ring and the guide portion are integrated by using a part of the support ring as the guide portion. 5. The support ring according to claim 2, wherein a portion closer to the opposite side of a portion having a length substantially one-third of the length of the blade plate in the air discharge direction is fixed to the support ring. A fan device according to claim 1. The plurality of blade plates are each integrally formed with the support ring and the plurality of guide portions, and include a first side including one end edge near a side surface having an air suction port of the housing; The first side is opposite to the first side and is divided into a second side including the other end, and the first side extends on a surface of the support ring and the plurality of guide portions integrated with each other. And then extending out of the annulus, wherein the second side extends out of the extended portion of the first side and subsequently to the opposite side of the edge. Item 4. The fan device according to any one of Items 1 to 3. The fan device according to claim 6, wherein a blade plate holding ring extends between and holds the front ends of the plurality of blade plates on the second side. 8. The fan device according to claim 1, wherein each of the plurality of support arms extends in a parabolic shape in a direction opposite to the rotation direction and in a direction toward the suction port. 9.

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