JP2009197593A - Fan device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan device which can improve static pressure and can lower a sound while suppressing the lowering of a wind volume. <P>SOLUTION: This fan device 11 is provided with an impeller 12 having a plurality of moving blades 22, a motor 13, an outer frame body 15, a first support body 16, a plurality of first stationary blades 18 connected by the first support body 16 having a wind receiving surface tilting with respect to a direction of a rotary shaft 23 and a plurality of second stationary blades 19 arranged for at least one of an air intake side or an exhaust side in the rotary shaft of the first stationary blades 18 in the direction of the rotary shaft 23 having a wind receiving surface tilting to the direction of the rotary shaft 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fan device.

  2. Description of the Related Art In recent years, electronic components tend to be concentrated and arranged inside an electronic device as the electronic device becomes more sophisticated and smaller. Since the electronic components are arranged in an integrated manner, the heat generated from the electronic components is also concentrated around the place where the electronic components are arranged, and the periphery tends to become high temperature. In order to avoid the influence of the generated heat on the electronic device, heat radiation to the outside of the electronic device is required. As one of the heat radiating means, there is a cooling means by a fan.

  There are various types of fans, among which are axial fans. In the axial fan, air is sucked from one side in the direction of the rotating shaft and exhausted to the other by the rotation of the impeller. In order to increase the static pressure of the exhausted air and rectify the air sucked and exhausted, a stationary blade is attached to the axial flow fan. The stationary blade can be attached to the intake port or the exhaust port. When a stationary blade is disposed at the intake port, the intake air can be rectified. When a stationary blade is arranged at the exhaust port, it can rectify the exhausted air and obtain a wind collecting effect that converts the centrifugal component that spreads outward in the radial direction of the air flow into an axial component. it can. However, during intake and exhaust, the air flow collides with the stationary blades, generating noise.

Prior art documents include those described in Patent Documents 1 to 4.
Utility Model Registration No. 3089663 JP 2004-132300 A US Pat. No. 6,318,964 US Pat. No. 6,777,992

  In general, the cooling performance required for a fan includes a high air volume and a high static pressure. As the air volume increases, a larger amount of heat can be taken from the object to be cooled, and the air in the housing of the electronic device or the like can be ventilated. When the static pressure of the air flow is low, the air flows back into the fan. Therefore, it is desirable that the static pressure of the air flow is as high as possible.

  As a means for increasing the static pressure of the airflow discharged from the fan, a stationary blade is generally attached to the exhaust port. Although the static pressure of the air flow can be increased by attaching the stationary blade, the air volume may be reduced because the cross-sectional area of the flow path at the exhaust port becomes narrow. Therefore, it is required to increase the static pressure while suppressing the decrease in the air volume.

  Therefore, the problem to be solved by the present invention is to provide a fan device capable of improving the static pressure and reducing the noise while suppressing the decrease in the air volume.

  In order to solve the above-described problem, in the first aspect of the present invention, the fan device is configured to generate a plurality of air flows that are sucked from one of the rotation axis directions and discharged to the other of the rotation axis directions by rotating. An impeller having a moving blade, a motor that drives the impeller, an outer frame that houses the impeller, a first support that is provided in the outer frame and supports the motor, and the first support A plurality of first stationary blades connected to each other and having a wind receiving surface inclined with respect to the rotational axis direction, and disposed on at least one of the intake side and the exhaust side of the first stationary blade in the rotational axis direction; A plurality of second stationary blades having a wind receiving surface inclined with respect to the rotation axis direction.

  According to a second aspect of the present invention, in the fan device according to the first aspect of the present invention, a second support body that is adjacent to the first support body along the rotational axis direction and to which the second stationary blade is connected is provided. Further prepare.

  According to a third aspect of the present invention, in the fan device according to the first or second aspect of the present invention, when viewed from the direction of the rotation axis, at least one of the first stationary blades is at least one of the second second blades. Overlaps at least part of the vane.

  According to a fourth aspect of the present invention, in the fan device according to the third aspect of the present invention, when viewed from the direction of the rotation axis, the first stationary blade and the second stationary blade all overlap.

  According to a fifth aspect of the present invention, in the fan device according to any one of the first to third aspects of the present invention, the first stationary blade and the second stationary blade are, when viewed from the rotational axis direction. The rotation axis is staggered in the circumferential direction.

  According to a sixth aspect of the present invention, in the fan device according to any one of the first to fifth aspects, the number of the first stationary blades is equal to the number of the second stationary blades.

  According to a seventh aspect of the present invention, in the fan device according to any one of the first to sixth aspects of the present invention, the first stationary blade and the second stationary blade are disposed through a gap along the rotational axis direction. Adjacent.

  According to an eighth aspect of the present invention, in the fan device according to any one of the first to seventh aspects, the wind receiving surface of the first stationary blade and the wind receiving surface of the second stationary blade. Are inclined in the same direction with respect to the rotation axis direction.

  According to a ninth aspect of the present invention, in the fan device according to any one of the first to eighth aspects, the outer frame body, the first support body, and the first stationary blade are injection-molded or die-cast. Is formed as a continuous member.

  According to a tenth aspect of the present invention, the impeller includes a plurality of moving blades that create a flow of air that is sucked from one of the rotating shaft directions and exhausted to the other of the rotating shaft directions by rotating. A motor that drives the impeller, an outer frame that houses the impeller, a first support that is provided in the outer frame and supports the motor, and is connected to the first support and rotates. A plurality of first stationary blades having a wind receiving surface inclined with respect to the axial direction, and arranged on at least one of the intake side and the exhaust side of the first stationary blade in the rotational axis direction, and with respect to the rotational axis direction A plurality of second stationary blades having a wind receiving surface that is inclined, and at least one of the plurality of second stationary blades is combined with at least one first stationary blade, whereby the direction of the rotation axis Inclining against Constituting the combined vane having a surface.

  According to an eleventh aspect of the present invention, in the fan device according to the tenth aspect, the second support body is adjacent to the first support body along the central axis direction and to which the second stationary blade is connected. Further prepare.

  According to a twelfth aspect of the present invention, in the fan device according to the tenth or eleventh aspect of the present invention, at least one of the combined stationary blades is adjacent to the first stationary blade, the second stationary blade, or the combination. At least a part of at least one of the stationary blades overlaps.

  According to a thirteenth aspect of the present invention, in the fan device according to any of the tenth to twelfth aspects of the present invention, the number of the first stationary blades and the number of the second stationary blades are the same.

  According to a fourteenth aspect of the present invention, in the fan device according to any one of the tenth to thirteenth aspects, the first stationary blade and the second stationary blade are interposed via a gap along the rotational axis direction. Adjacent.

  According to a fifteenth aspect of the present invention, in the fan device according to any of the tenth to fourteenth aspects, the outer frame body, the first support body, and the first stationary blade are injection molded or die cast. Is formed as a continuous member.

  According to the first to ninth aspects of the present invention, a plurality of first vanes as the vanes and a plurality of vanes arranged on at least one of the intake side and the exhaust side in the rotation axis direction of the first vanes. The second stationary blade is provided. Therefore, the air flow generated by the rotation of the impeller easily collides with the stationary blade, and the static pressure can be improved. In addition, the air flow passes through the gap between the adjacent stationary blades, but the first stationary blade and the second stationary blade are arranged in steps in the rotation axis direction, so that the stationary air blades are adjacent to each other. The span when passing through the gap becomes longer, and it becomes difficult for the air flow to flow backward through the gap between the adjacent stationary blades. As a result, it is possible to improve the static pressure while securing the cross-sectional area of the air flow path and suppressing the decrease in the air volume.

  Further, since the first stator blade and the second stator blade described above are provided as the stator blades, the number of stator blades arranged at a position where the distance from the rotor blade in the rotation axis direction is small can be reduced. When a rotating blade approaches and separates from a stationary stationary blade, the air flow pushed by the moving blade collides with the stationary blade and temporarily compresses and expands, causing noise (interference sound). ) Occurs. The noise increases as the distance between the stationary blades and the moving blades along the rotation axis direction decreases and as the number of stationary blades arranged near the moving blades increases. Therefore, in order to reduce the noise, it is better that the number of stationary blades with a small distance between the stationary blades and the moving blades in the direction of the rotation axis is smaller, but the stationary blades with a smaller distance between such moving blades. If the number is small, the static pressure tends to decrease. Therefore, in the present invention, by providing the above-described first stationary blade and the second stationary blade as stationary blades, by reducing the number of stationary blades arranged at a position where the distance between the moving blade and the rotation axis direction is small, The static pressure can be improved while suppressing noise (interference sound) when the air flow passes between the moving blade and the stationary blade.

  In addition, since the first and second stator blades described above are provided as the stator blades, a plurality of pieces can be combined to form a stationary blade, even if the stator blade arrangement or shape is usually difficult to mold with a mold. A complicated arrangement or shape of the wing can be realized, which is advantageous for improvement of static pressure and noise reduction.

  According to the second aspect of the present invention, the second support body to which the second stator blade is connected and the first support body to which the first stator blade is connected are formed as separate members, so that the mold is usually used. Even with the arrangement or shape of a stationary blade that is difficult to be molded by the above, it is possible to easily realize a complicated arrangement or shape of a stationary blade by combining a plurality of pieces.

  According to the ninth aspect of the present invention, the outer frame body, the first support body, and the first stationary blade are formed as a continuous member by molding, so that the fan device can be mass-produced at low cost.

  According to the invention described in claims 10 to 15, a plurality of first stationary blades as stationary blades and a plurality of stationary blades arranged on at least one of the intake side and the exhaust side in the rotation axis direction of the first stationary blades. The second stationary blade is provided. Therefore, the air flow generated by the rotation of the impeller easily collides with the stationary blade, and the static pressure can be improved. In addition, the air flow passes through the gap between the adjacent stationary blades, but the first stationary blade and the second stationary blade are arranged in steps in the rotation axis direction, so that the stationary air blades are adjacent to each other. The span when passing through the gap becomes longer, and it becomes difficult for the air flow to flow backward through the gap between the adjacent stationary blades. As a result, it is possible to improve the static pressure while securing the cross-sectional area of the air flow path and suppressing the decrease in the air volume.

  Further, since the first stator blade and the second stator blade described above are provided as the stator blades, the number of stator blades arranged at a position where the distance from the rotor blade in the rotation axis direction is small can be reduced. When a rotating blade approaches and separates from a stationary stationary blade, the air flow pushed by the moving blade collides with the stationary blade and temporarily compresses and expands, causing noise (interference sound). ) Occurs. The noise increases as the distance between the stationary blades and the moving blades along the rotation axis direction decreases and as the number of stationary blades arranged near the moving blades increases. Therefore, in order to reduce the noise, it is better that the number of stationary blades with a small distance between the stationary blades and the moving blades in the direction of the rotation axis is smaller, but the stationary blades with a smaller distance between such moving blades. If the number is small, the static pressure tends to decrease. Therefore, in the present invention, by providing the above-described first stationary blade and the second stationary blade as stationary blades, by reducing the number of stationary blades arranged at a position where the distance between the moving blade and the rotation axis direction is small, The static pressure can be improved while suppressing noise (interference sound) when the air flow passes between the moving blade and the stationary blade.

  In addition, since the first and second stator blades described above are provided as the stator blades, a plurality of pieces can be combined to form a stationary blade, even if the stator blade arrangement or shape is usually difficult to mold with a mold. A complicated arrangement or shape of the wing can be realized, which is advantageous for improvement of static pressure and noise reduction. In particular, in the present invention, a combined stationary blade is configured by combining at least one first stationary blade and at least one second stationary blade, so that the shape of the stationary blade is usually difficult to mold with a mold. Even in such a case, a plurality of pieces can be combined to form a stationary blade having a complicated shape, which is advantageous for improving static pressure and reducing noise.

  According to the eleventh aspect of the present invention, the second support body to which the second stator blade is connected and the first support body to which the first stator blade is connected are formed as separate members. Even with the arrangement or shape of a stationary blade that is difficult to be molded by the above, it is possible to easily realize a complicated arrangement or shape of a stationary blade by combining a plurality of pieces.

  According to the invention described in claim 15, since the outer frame body, the first support body, and the first stationary blade are formed as continuous members by injection molding or die casting, the fan device can be mass-produced at low cost. it can.

[First Embodiment]
FIG. 1 is a cross-sectional view of the fan device 11 according to the first embodiment of the present invention, and FIG. 2 is a plan view of the fan device 11. As shown in FIGS. 1 and 2, the fan device 11 includes an impeller 12, a motor 13, a circuit board 14, an outer frame body 15, first and second support bodies 16 and 17, and a plurality of first devices. 1 and second stationary blades 18 and 19. In FIG. 2, the hatched stator blade is the first stator blade 18, and the non-hatched stator blade is the second stator blade 19.

  The outer frame body 15, the first support body 16, and the first stationary blade 18 are formed as continuous members by injection molding or die casting. In the case of injection molding, a resin material or the like is used as the material, and in the case of die casting, aluminum (including an aluminum alloy) or the like is used. In general, molds used for injection molding or die casting are mainly two types of mold members: a movable mold and a fixed mold which are separated from the outer frame body 19 and the like in the direction of the rotation axis 23. Consists of. As a result, the fan device 11 can be mass-produced at low cost. The second support 17 and the second stationary blade 19 are formed as continuous members by injection molding or die casting.

  The impeller 12 includes a cup portion 21 that accommodates the motor 13 and a plurality of moving blades 22 that extend radially outward from the cup portion 21, and the rotating shaft rotates as the moving blade 22 rotates. An air flow is generated from one side in the 23 direction and exhausted to the other side in the direction of the rotary shaft 23. In addition, the upper side in FIG. The outer frame body 15 is provided so as to surround the impeller 12. The first support 16 is provided inside the outer frame 15 and supports the motor 13 and the circuit board 14.

  In the fan device 11, in the arrangement state shown in FIG. 1, at least a part of the opening on the exhaust side in the direction of the rotational axis 23 of the outer frame 15 is radially outward toward the exhaust side in the direction of the rotational axis 23. An enlarged diameter portion 15a having an expanding inner peripheral surface is provided. In addition, at least a part of the opening on the intake side in the direction of the rotation axis 23 of the outer frame 15 is provided with an enlarged diameter portion 15b having an inner peripheral surface that extends radially outward toward the intake side in the direction of the rotation axis 23. It has been. More specifically, since the shape of the outer frame body 15 when viewed from the exhaust side in the direction of the rotation shaft 23 is a substantially rectangular frame shape, the enlarged diameter portions 15a and 15b have four corner portions (corner portions) of the opening portion. ). The shape of the outer frame 15 is not limited to this. By providing such enlarged diameter portions 15 a and 15 b, the air flow generated by the rotation of the impeller 12 is smoothly taken in and out of the inside and outside of the fan device 11.

  1 is connected to a straight portion 15c having an inner peripheral surface that extends substantially parallel to the direction of the rotating shaft 23. The lower end of the enlarged diameter portion 15a on the exhaust side in the direction of the rotating shaft 23 in FIG. Yes. Further, the upper end (exhaust side end portion in the direction of the rotation shaft 23 direction) of the enlarged diameter portion 15b on the intake side in the direction of the rotation shaft 23 in FIG.

  As the shape of the first support 16, any shape can be adopted as long as the motor 13 and the circuit board 14 can be supported. In the present embodiment, the first support 16 has a substantially circular shape when viewed from the exhaust side in the direction of the rotary shaft 23 as shown in FIGS. 1 and 2, but is limited to a circular shape. is not.

  The first stationary blade 18 connects the outer frame body 15 and the first support body 16, and extends radially from the first support body 16 toward the radially outer side of the fan device 11.

  The 2nd support body 17 is a member for supporting the 2nd stationary blade 19, and is arrange | positioned adjacent to the 1st support body 16 along the rotating shaft 23 direction in this embodiment. For example, the second support body 17 is fixed to the first support body 16 by fixing means (for example, an engaging portion and an engaged portion that are engaged with each other, a fixing tool such as a bolt, or an adhesive). In the example shown in FIG. 1, the second support member 17 has a substantially ring shape in accordance with the shape of the first support member 16 (that is, the outer shape of the first support member 16 when viewed from the exhaust shaft 23 direction exhaust side). ing. However, the shapes of the first support 16 and the second support 17 do not necessarily need to match.

  As a modified example, a frame member to which the radially outer end of the second stationary blade 19 is connected may be added. The frame member has a frame shape (for example, a substantially rectangular ring shape) substantially the same as that of the outer frame body 15 when viewed from the direction of the rotation axis 23, and is disposed on the exhaust side of the outer frame body 15 in the rotation axis 23 direction.

  The second stationary blade 19 is disposed on at least one of the intake side and the exhaust side of the first stationary blade 18 in the direction of the rotation axis 23. In the present embodiment, the second stationary blade 19 is disposed on the intake side in the direction of the rotation axis 23 of the first stationary blade 18. The second stationary blade 19 is connected to the second support 17 at the radially inner end thereof. As a modification, the end portion on the radially inner side of the second stationary blade 19 may be connected to the first support 16 or may be suspended in the air.

  Here, as shown in FIG. 1, the second stationary blade 19 formed as a separate member from the first stationary blade 18 is arranged on the exhaust side in the direction of the rotation axis 23 of the first stationary blade 18. There are advantages. That is, the diameter-enlarged portion 15a is provided in the opening on the exhaust side in the direction of the rotation axis 23 of the outer frame body 15 in which the first stator blade 18 and the second stator blade 19 are arranged as described above. For this reason, in the case where the radially outer end of the second stationary blade 19 is coupled to the enlarged diameter portion 15a of the outer frame body 15, the second stationary blade 19 and the outer frame body 15 are If a continuous member is formed by using a mold that is released in the direction of the rotation axis 23 by injection molding or die casting, it is viewed from the direction of the rotation axis 23 of the joint between the second stationary blade 19 and the enlarged diameter portion 15a. A pedestal is formed in the shaded part. The pedestal portion disturbs the air flow generated by the rotation of the impeller 12. However, in the configuration according to the present embodiment, the second stator blade 19 is formed as a separate member from the first stator blade 18, the outer frame body 15, and the first support body 16. Even if the end portion on the outer side in the direction is provided at a position overlapping the enlarged diameter portion 15a when viewed from the exhaust side in the direction of the rotating shaft 23, the end portion on the outer side in the radial direction of the second stationary blade 19 is as described above. The pedestal portion is not formed, and the air flow is not disturbed by the pedestal portion. As a result, it is possible to avoid a noise and a decrease in efficiency caused by the air flow colliding with the pedestal.

  Further, since the end portion on the radially outer side of the second stationary blade 19 can be arranged so as to overlap the enlarged diameter portion 15a when viewed from the exhaust side in the direction of the rotation shaft 23 without forming a pedestal portion, The adjustment performance by the first stationary blade 18 and the second stationary blade 19 with respect to the air flow passing through the opening on the exhaust side in the direction of the rotation axis 23 of the fan device 11 can be further improved. In this case, a groove extending in the extending direction of the second stationary blade 19 and opening on the exhaust side in the direction of the rotating shaft 23 is formed in the enlarged diameter portion 15a, and the radially outer side of the second stationary blade 19 is formed in the groove. You may fit the edge part.

  The first and second stationary blades 18 and 19 have wind receiving surfaces 18 a and 19 a that are inclined in the same direction with respect to the direction of the rotation shaft 23 and mainly receive an air flow generated by the rotation of the impeller 12. ing. Further, the cross-sectional shape of the first and second stationary blades 18 and 19 perpendicular to the radial direction of the impeller 12 is an airfoil cross-sectional shape (for example, concave toward the exhaust side in the direction of the rotary shaft 23). A substantially arc-shaped cross-sectional shape that is curved in a straight line). In addition, the shape of the cross section perpendicular to the radial direction of the impeller 12 of the first and second stationary blades 18 and 19 may be a flat plate shape or the like. As yet another configuration, the first stator blades 18, the second stator blades 19, or the first stator blades 18 and the second stator blades 19 have different cross-sectional shapes and inclinations with respect to the rotating shaft 23. Also good.

  By the first stator blade 18 and the second stator blade 19 having such a blade shape, the air flow generated by the rotation of the impeller 12 is accurately and efficiently collected so as to be a flow along the rotation shaft 23. . Alternatively, the first and second stationary blades 18 and 19 can direct the direction of airflow in an arbitrary direction such as radially inward or radially outward.

  In addition, about the 1st stator blade 18 and the 2nd stator blade 19, the stator blade of the side located in the rotating shaft 23 direction exhaust side (namely, the 1st side which is near the end surface of the rotating shaft 23 direction exhaust side of the fan apparatus 11). You may make the inclination with respect to the rotating shaft 23 of the 1st and 2nd stationary blades 18 and 19 larger so that the stationary blade 18 or the 2nd stationary blade 19). For example, in the case of the configuration shown in FIG. 1, as shown in FIGS. 3 (a) and 3 (b), the first static blade 18 is more inclined than the inclination angle θ1 with respect to the straight line 23a parallel to the rotational axis 23 of the first stationary blade 18. The inclination angle θ2 with respect to the straight line 23a of the second stationary blade 19 arranged on the exhaust side in the direction of the rotation axis 23 from the blade 18 is made larger. In the axial fan, the swirl component of the air flow increases toward the exhaust side (downstream side) in the direction of the rotary shaft 23, so the stationary blade on the side located on the exhaust side in the direction of the rotary shaft 23 (that is, the rotary shaft 23 of the fan device 11). By increasing the inclination of the first and second stationary blades 18 and 19 with respect to the rotating shaft 23 toward the first stationary blade 18 or the second stationary blade 19) closer to the end face on the directional exhaust side, the air flow can be increased. It can collect air efficiently. At the same time, the static pressure can be further increased.

  Here, the inclination angles θ1 and θ2 of the first stator blade 18 and the second stator blade 19 with respect to the rotation shaft 23 will be described in more detail. Consider a virtual cylinder extending in the direction of the rotation axis 23 as the center of the rotation axis 23. In the cross section formed when the first stator blade 18 (or the second stator blade 19) is cut with the cylinder, both ends of the first stator blade 18 (or the second stator blade 19) on the intake side and the exhaust side in the direction of the rotation axis 23 An angle formed by a straight line 24 (or a straight line 25) connecting the portions and a straight line 23a parallel to the rotation axis 23 is defined as an inclination angle θ1 (or an inclination angle θ2).

  Further, the following effects can be obtained by changing the inclinations of the first stator blade 18 and the second stator blade 19 as described above. That is, considering the component of the air flow sent out by the rotation of the impeller 12 of the fan device 11, the axial component that flows along the rotary shaft 23 toward the exhaust side in the direction of the rotary shaft 23, radially outward from the direction of the rotary shaft 23. The centrifugal component that flows toward the center and the swirl component that swirls around the rotation shaft 23 in the circumferential direction can be mainly classified into three types. The ratio of the sizes of these components varies depending on the shape of the impeller 12 and the outer frame 15, the rotational speed of the impeller 12, and the like. By changing the inclination angles θ1 and θ2 of the first stationary blade 18 and the second stationary blade 19 with respect to the rotating shaft 23 in accordance with the sizes of the three types of components, the static pressure increase effect of the exhausted air flow and The wind collecting effect associated therewith can be obtained.

  For example, in the fan device 11 having the configuration shown in FIG. 1, depending on conditions, the swirl component may increase as the air flow sent out by the rotation of the impeller 12 moves toward the exhaust side in the direction of the rotation shaft 23. In such a case, the relationship between the inclination angle θ1 of the first stationary blade 18 with respect to the rotational axis 23 and the inclination angle θ2 of the second stationary blade 19 with respect to the rotational axis 23 is larger than the inclination angle θ1. By doing so, the swirl component of the air flow can be converted into a flow (axial component) along the axial direction (that is, wind collecting and rectification can be performed). As a result, the static pressure of the exhausted air flow can be increased simultaneously with the air collection / rectification.

  As described above, by changing the above-described inclination angles θ1 and θ2, not only the air collection but also the static pressure and the airflow of the air flow sent out from the fan device 11 can be adjusted to arbitrary amounts.

  Further, in the present embodiment, the number of the first stationary blades 18 and the number of the second stationary blades 19 are set equal, and when viewed from the direction of the rotation shaft 23, the first stationary blade 18 and the second stationary blade 19 are used. Are staggered in the circumferential direction around the rotation shaft 23. More specifically, the first stationary blades 18 and the second stationary blades 19 are arranged so as to be alternately arranged at substantially equal intervals in the circumferential direction around the rotation shaft 23. Note that the number of the first stationary blades 18 and the second stationary blades 19 is not limited to the same number, and a configuration in which the number of the first stationary blades 18 and the number of the second stationary blades 19 are different may be employed. Further, the arrangement of the first and second stationary blades 18 and 19 is not limited to the above-described configuration, but only the first stationary blade 18 is arranged at substantially equal intervals in the circumferential direction, and the second stationary blade 19 is arranged around the circumference. The second stator blades 19 may be arranged at substantially equal intervals in the circumferential direction, and the first stator blades 18 may be arranged at unequal intervals in the circumferential direction.

  In the present embodiment, the first stator blade 18 and the second stator blade 19 are arranged with a gap in the direction of the rotation axis 23, but the first stator blade 18 and the first stator blade 18 without a gap in the direction of the rotation axis 23. A second stationary blade 19 may be disposed. For example, a configuration in which all the first stator blades 18 and the second stator blades 19 are arranged with a gap in the direction of the rotating shaft 23, and all the first stator blades 18 and the second stator blades 19 are in the direction of the rotating shaft 23. Or a plurality of first stator blades 18 and a plurality of second stator blades 19 are arranged with a gap in the direction of the rotation axis 23, and the rest A configuration in which the first stationary blade 18 and the second stationary blade 19 are arranged in contact with each other without a gap may be employed.

  In the present embodiment, the first and second stationary blades 18 and 19 are arranged on the exhaust side in the direction of the rotary shaft 23 of the impeller 12 so that air generated by the rotation of the impeller 12 can be efficiently collected or changed in direction. Although arranged, the first and second stationary blades 18 and 19 may be arranged on the intake side in the direction of the rotation axis 23 of the impeller 12 in order to rectify the intake air.

  The motor 13 includes a rotor magnet 31 attached to the inner peripheral surface of the impeller 12 and an armature 32 that generates torque between the rotor magnet 31. Such a motor 13 is accommodated in the cup part 21 provided in the center part of the above-mentioned impeller 12. The circuit board 14 includes a control circuit for controlling the rotation of the motor 13.

  As described above, according to the present embodiment, a plurality of first stationary blades 18 as stationary blades and at least one of the intake side and the exhaust side in the direction of the rotation axis 23 of the first stationary blade 18 (in this embodiment) And a plurality of second stationary blades 19 arranged on the exhaust side of the first stationary blade 18 in the direction of the rotation axis 23). Therefore, the air flow generated by the rotation of the impeller 12 easily collides with the stationary blade, and the static pressure can be improved. Further, the air flow passes through the gap between the first stationary blades 18 adjacent in the circumferential direction around the rotation shaft 23 and the gap between the second stationary blades 19 adjacent in the circumferential direction. Since the blades 18 and the second stationary blades 19 are arranged in steps in the direction of the rotary shaft 23, the span when the air flow passes between the first and second stationary blades 18 and 19 becomes long, and the air flow becomes It becomes difficult to reversely flow in the gap between the adjacent first and second stationary blades 18 and 19. As a result, it is possible to improve the static pressure while securing the cross-sectional area of the air flow path and suppressing the decrease in the air volume.

  Further, since the first stationary blade 18 and the second stationary blade 19 are provided as the stationary blades, the stationary blades (in the present embodiment, the first stationary blade is disposed at a position where the distance from the moving blade 22 in the direction of the rotation axis 23 is small). The number of stationary blades 18) can be reduced. In general, noise (interference sound) is generated when an air flow generated by the moving blade 22 passes between the rotating moving blade 22 and a stationary blade arranged near the moving blade 22. This noise is caused by the distance between the stationary blade and the moving blade 22 in the direction of the rotating shaft 23 (when the stationary blade and the rotating moving blade are close to each other, the moving end of the stationary blade in the direction of the rotating shaft 23 on the intake side The smaller the distance in the direction of the rotational axis 23 between the blade 22 and the end on the exhaust side in the direction of the rotational axis 23, the greater the number of stationary blades disposed near the moving blade 22. Therefore, in order to reduce the noise, it is better that the number of stationary blades arranged near the moving blade 22 is small. However, if the number of stationary blades arranged near the moving blade 22 is small, the static pressure is likely to decrease. Become. Therefore, in the present embodiment, the first vane 18 and the second vane 19 are provided as the vanes, and the vane is arranged at a position where the distance from the moving blade 22 in the direction of the rotation axis 23 is small (this embodiment). Then, by reducing the number of the first stationary blades 18), the static pressure can be improved while suppressing noise (interference sound) when the air flow passes between the moving blade 22 and the stationary blade.

  In addition, since the first stator blade 18 and the second stator blade 19 are provided as the stator blades, a plurality of pieces can be combined to form the stator blade even if the stator blade arrangement or shape is normally difficult to mold with a mold. A complicated arrangement or shape of the wing can be realized, which is advantageous for improvement of static pressure and noise reduction. In particular, by forming the second support body 17 to which the second stator blade 19 is connected and the first support body 16 to which the first stator blade 18 is connected as separate members, it is usually difficult to mold with a mold. Even with the arrangement or shape of the stationary blade, a complicated arrangement or shape of the stationary blade can be easily realized by combining a plurality of pieces.

  4 and 5 are views showing a modification of the stationary blade provided in the fan device 11 of FIG. 4 and FIG. 5 show the section of each stationary blade when the stationary blade provided in the fan device 11 is cut by a cylinder centering on the rotating shaft 23 in a planar manner. The positional relationship regarding the rotating shaft 23 direction of the stationary blade with which the apparatus 11 is equipped, and the circumferential direction centering on the rotating shaft 23 is shown (this is the same also about FIG. 6 mentioned later).

  In the above-described embodiment, the first stator blade 18 and the second stator blade 19 are arranged in two stages in the direction of the rotation axis 23 as the stator blades, but the stator blades may be arranged in three or more stages. For example, in the modification shown in FIGS. 4 and 5, the stationary blades are arranged in three stages along the direction of the rotation axis 23. For example, in the configuration of FIGS. 4 and 5, the lowest stator blade closest to the impeller 12 (intake side on the rotation shaft 23 direction) is the first stator blade 18, and on the exhaust side (upper side) in the rotation shaft 23 direction. A plurality of second stationary blades 19 are arranged in two stages. More specifically, in the modification of FIG. 4, when viewed from the direction of the rotation shaft 23, the lowermost first stationary blade 18 and the upper and middle second stationary blades 19 are all overlapped. Further, in the modification of FIG. 5, the lowermost first stationary blade 18 and the upper and middle second stationary blades 19 are connected obliquely with respect to the direction of the rotary shaft 23 as if they formed one stationary blade. Are arranged. Further, in the modification of FIG. 5, the stationary blades adjacent to each other in the direction of the rotation axis 23 (that is, the first stationary blade 18 in the lower stage and the second stationary blade 19 in the middle stage, and the second stationary blade 19 in the middle stage and the upper stage). The second stator blades 19 are arranged so that the edges of the stator blades overlap each other when viewed from the direction of the rotation axis 23.

  4 and 5, for example, the lower first stationary blade 18 is connected to the first support 16 and the outer frame 15 at both ends in the radial direction. Further, the radially inner end of the middle second stator blade 19 and the radially inner end of the upper second stator blade 19 are used for the middle second stator blade 19 and the upper second stator blade 19. It connects to the 2nd support body 17 provided individually for the stationary blades 19 one by one. As another configuration, the radially inner end of the middle second stator blade 19 and the radially inner end of the upper second stator blade 19 are connected to one second support body 17. May be.

  As still another modification, the blade shape of each stage stationary blade (including the inclination with respect to the rotation axis 23) and the overlap when viewed from the direction of the rotation axis 23 of each stage stationary blade adjacent to the direction of the rotation axis 23 are shown. The direction may be different for each stage. For example, a configuration in which only the upper second stator blade 19 and the lower first stator blade 18 overlap each other when viewed from the direction of the rotation axis 23 (in this case, the middle second stator blade 19 includes the upper second stator blade 19 and the lower And the second stator blade 19 in the middle stage and the first stator blade 18 in the lower stage overlap each other when viewed from the direction of the rotation axis 23 (in this case, the second stator blade in the upper stage). The blade 19 can be variously modified such as not overlapping the middle second stator blade 19 and the lower first stator blade 18).

  In the first embodiment described above, the first stator blade 18 and the second stator blade 19 are arranged so as to be shifted in the direction of the rotary shaft 23. As a modification regarding this point, for example, as shown in FIG. 6, by combining the first stator blade 18 and the second stator blade 19 from the intake side and the exhaust side in the direction of the rotary shaft 23, The two stationary blades 19 may be arranged at substantially the same position in the direction of the rotation axis 23. In this case, the first stator blade 18 and the second stator blade 19 constitute a series of stator blade groups arranged in the circumferential direction around the rotation shaft 23.

[Second Embodiment]
FIG. 7 is a cross-sectional view of a fan device 41 according to the second embodiment of the present invention, FIG. 8 is a diagram showing a configuration of a stationary blade provided in the fan device 41, and FIG. 9 is provided in the fan device 41. FIG. 10 is an exploded perspective view of the configuration shown in FIG. 9. 9 and 10, the outer frame body 15 and a portion of the first support body 44 described later that supports the motor 13 and the circuit board 14 are omitted from the configuration shown in FIG. 7.

  8 and FIGS. 11 and 12 to be described later are similar to FIGS. 4 and 5 described above, and the cross section of each stationary blade when the stationary blade provided in the fan device 41 is cut by a cylinder with the rotation shaft 23 as the center. Is shown in a planar manner, and shows the positional relationship between the direction of the rotating shaft 23 of the stationary blade provided in the fan device 41 and the circumferential direction around the rotating shaft 23. Further, the fan device 41 according to the present embodiment is substantially different from the fan device 11 according to the first embodiment described above only in the stationary blade and its related parts, and the same reference numerals are used for the parts corresponding to each other. A description thereof will be omitted.

  In the fan device 41 according to the present embodiment, as shown in FIGS. 7 to 10, at least one of the plurality of first stationary blades 42 on the intake side or the exhaust side in the direction of the rotation axis 23 (in the present embodiment, on the exhaust side). The same number of second stator blades 43 as the first stator blades 42 are provided adjacent to each other in a one-to-one correspondence in the direction of the rotary shaft 23.

  The first and second stationary blades 42 and 43 have wind receiving surfaces 42a and 43a that are inclined in the same direction with respect to the direction of the rotary shaft 23 and mainly receive an air flow generated by the rotation of the impeller 12. ing. The cross-sectional shape of the first and second stationary blades 42 and 43 perpendicular to the radial direction of the impeller 12 is an airfoil cross-sectional shape (for example, concave toward the exhaust side in the direction of the rotary shaft 23). A substantially arc-shaped cross-sectional shape that is curved in a straight line). In addition, the shape of the cross section perpendicular to the radial direction of the impeller 12 of the first and second stationary blades 42 and 43 may be a flat plate shape or the like. In the present embodiment, the first and second stationary blades 42 and 43 are disposed on the exhaust side of the impeller 12 in the direction of the rotational axis 23, but the first and second stationary blades 42 and 43 are disposed on the rotational shaft 23 of the impeller 12. It may be arranged on the direction intake side.

  In the present embodiment, each of the first stationary blades 42 and each of the second stationary blades 43 adjacent to each other in the direction of the rotating shaft 23 is combined to form a plurality of combined stationary blades 46. The combined stationary blade 46 has a wind receiving surface 46 a that is inclined with respect to the direction of the rotation shaft 23 and that mainly receives an air flow generated by the rotation of the impeller 12. Further, as shown by an auxiliary line 47 in FIG. 8, the combination stationary blades 46 adjacent to each other around the rotation shaft 23 in the circumferential direction are part of the combination stationary blade 46 (see FIG. 8). For example, circumferential edges) overlap each other. In the present embodiment, the combination stationary blades 46 adjacent to each other in the circumferential direction are partially overlapped with each other when viewed from the direction of the rotating shaft 23, but may not necessarily overlap. For example, it is possible to employ a configuration in which all the combination vanes 46 do not overlap each other when viewed from the direction of the rotation axis 23, or a configuration in which only some of the plurality of combination vanes 46 overlap each other.

  In the present embodiment, the first stationary blade 42 and the second stationary blade 43 that constitute the combined stationary blade 46 are disposed adjacent to each other in close contact with the rotation shaft 23.

  In the present embodiment, both ends in the radial direction of the first stationary blade 42 are connected to the first support body 44 and the outer frame body 15 that support the motor 13 and the circuit board 14. A second support 45 is disposed on the exhaust side of the first support 44 in the direction of the rotation axis 23, and the radially inner end of the second stationary blade 43 is connected to the second support 45. .

  Also in this embodiment, the outer frame body 15, the first support body 44, and the first stationary blade 42 are formed as a continuous member by injection molding or die casting, and the second support body 45 and the second stationary blade 43 are injection molded. Alternatively, it is formed as a continuous member by die casting. In the case of injection molding, a resin material or the like is used as the material, and in the case of die casting, aluminum (including an aluminum alloy) or the like is used.

  With the configuration as described above, the present embodiment can provide substantially the same effects as those of the first embodiment described above. In particular, in the present embodiment, since the combined stationary blade 46 is configured by combining the first stationary blade 42 and the second stationary blade 43, even if the shape of the stationary blade is usually difficult to mold with a mold. A plurality of pieces can be combined to form a stationary blade having a complicated shape, which is advantageous for improving static pressure and reducing noise.

  In the present embodiment, all the first stationary blades 42 and all the second stationary blades 43 are combined to form the combined stationary blade 46. However, at least one of the plurality of first stationary blades 42 is used. The combined stationary blade 46 may be configured by combining at least one of the two and the plurality of second stationary blades 43.

  Further, in the present embodiment, the first stator blade 42 and the second stator blade 43 constituting the combination stator blade 46 are arranged in close contact with the direction of the rotary shaft 23. However, as shown in FIG. The first stationary blade 42 and the second stationary blade 43 constituting the blade 46 may be arranged in a state adjacent to each other with a gap 48 in the direction of the rotation shaft 23. Alternatively, some of the plurality of first stator blades 42 and second stator blades 43 are arranged with a gap in the direction of the rotation axis 23, and the remaining first stator blades 42 and second stator blades 43 are rotated. The structure etc. which contact | abut and arrange | position without opening a clearance gap in the axis | shaft 23 direction are employable.

  In the present embodiment, the combined stationary blade 46 is configured by combining two pieces (the first stationary blade 42 and the second stationary blade 43), but the combined stationary blade 46 is configured by combining three or more pieces. Also good. For example, as shown in FIG. 12, a combined stationary blade is formed by combining one first stationary blade 42 and two second stationary blades 43 disposed on the intake side and the exhaust side in the direction of the rotation axis 23 of the first stationary blade 42. 46 may be configured. In addition, as shown in FIG. 12, the shape of the combination stationary blade 46 may be different for each combination stationary blade 46.

  In the present embodiment, a configuration in which the plurality of second stationary blades 43 are coupled to the second support body 45 is employed. However, the second support body 45 is not essential and may be omitted. For example, the second support body 45 may be omitted, the second stator blade 43 may be fixed to the first support body 44, and the combined stator blade 46 may be configured from the first stator blade 42 and the second stator blade 43, Alternatively, the combined stationary blade 46 may be configured from the first stationary blade 42 and the second stationary blade 43 by fixing the second stationary blade 43 to the first stationary blade 42.

It is sectional drawing of the fan apparatus which concerns on 1st Embodiment of this invention. It is a top view of the fan apparatus of FIG. FIG. 3A and FIG. 3B are diagrams showing a modification of the stationary blade provided in the fan device of FIG. It is a figure which shows the modification of the stationary blade with which the fan apparatus of FIG. 1 is equipped. It is a figure which shows the modification of the stationary blade with which the fan apparatus of FIG. 1 is equipped. It is a figure which shows the modification of the stationary blade with which the fan apparatus of FIG. 1 is equipped. It is sectional drawing of the fan apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the stationary blade with which the fan apparatus of FIG. 7 is equipped. It is a perspective view which shows the structure of the stationary blade with which the fan apparatus of FIG. 7 is equipped, and a support body. FIG. 10 is an exploded perspective view of the configuration shown in FIG. 9. It is a perspective view which shows the modification of the stationary blade with which the fan apparatus of FIG. 7 is equipped. It is a perspective view which shows the modification of the stationary blade with which the fan apparatus of FIG. 7 is equipped.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 Fan apparatus, 12 Impeller, 13 Motor, 14 Circuit board, 15 Outer frame body, 16 1st support body, 17 2nd support body, 18 1st stator blade, 18a Wind receiving surface, 19 2nd stator blade, 19a Wind surface, 21 cup part, 22 blade, 23 rotating shaft, 31 rotor magnet, 32 armature, 41 fan device, 42 first stationary blade, 42a wind receiving surface, 43 second stationary blade, 43a wind receiving surface, 44 1st support body, 45 2nd support body, 46 Combination stationary blade, 46a Wind receiving surface.

Claims (15)

A fan device,
An impeller having a plurality of moving blades that create a flow of air that is sucked from one side in the direction of the rotation axis by rotating and exhausted to the other side in the direction of the rotation axis;
A motor for driving the impeller;
An outer frame housing the impeller;
A first support provided in the outer frame and supporting the motor;
A plurality of first stationary blades connected to the first support and having a wind receiving surface inclined with respect to the rotation axis direction;
A plurality of second stationary blades having a wind receiving surface disposed on at least one of the intake side and the exhaust side of the first stationary blade in the rotational axis direction, and inclined with respect to the rotational axis direction;
A fan device comprising: The fan device according to claim 1,
A fan device further comprising a second support that is adjacent to the first support along the rotation axis direction and to which the second stationary blade is connected. The fan device according to claim 1 or 2,
The fan device, wherein when viewed from the direction of the rotation axis, at least one of the first stationary blades overlaps at least a part of at least one of the second stationary blades. The fan device according to claim 3, wherein
The fan device, wherein the first stator blade and the second stator blade are all overlapped when viewed from the rotation axis direction. The fan device according to any one of claims 1 to 3,
The fan device, wherein the first stator blade and the second stator blade are staggered in the circumferential direction about the rotation axis when viewed from the rotation axis direction. The fan device according to any one of claims 1 to 5,
The fan device, wherein the number of the first stationary blades is equal to the number of the second stationary blades. The fan device according to any one of claims 1 to 6,
The fan device, wherein the first stator blade and the second stator blade are adjacent to each other via a gap along the rotation axis direction. The fan device according to any one of claims 1 to 7,
The fan device, wherein the wind receiving surface of the first stationary blade and the wind receiving surface of the second stationary blade are inclined in the same direction with respect to the rotation axis direction. The fan device according to any one of claims 1 to 8,
The fan apparatus, wherein the outer frame body, the first support body, and the first stationary blade are formed as a continuous member by injection molding or die casting. A fan device,
An impeller having a plurality of moving blades that create a flow of air that is sucked from one side in the direction of the rotation axis by rotating and exhausted to the other side in the direction of the rotation axis;
A motor for driving the impeller;
An outer frame housing the impeller;
A first support provided in the outer frame and supporting the motor;
A plurality of first stationary blades connected to the first support and having a wind receiving surface inclined with respect to the rotation axis direction;
A plurality of second stationary blades having a wind receiving surface disposed on at least one of the intake side and the exhaust side of the first stationary blade in the rotational axis direction, and inclined with respect to the rotational axis direction;
With
Combining at least one of the plurality of second stator blades with at least one of the first stator blades constitutes a combined stator blade having a wind receiving surface inclined with respect to the rotation axis direction. Features a fan device. The fan device according to claim 10, wherein
A fan device, further comprising a second support that is adjacent to the first support along the central axis direction and to which the second stationary blade is connected. The fan device according to claim 10 or 11,
At least one of the combined stationary blades is at least partially overlapped with at least one of the adjacent first stationary blade, the second stationary blade, or the combined stationary blade. The fan device according to any one of claims 10 to 12,
The fan device, wherein the number of the first stator blades and the number of the second stator blades are the same. The fan device according to any one of claims 10 to 13,
The fan device, wherein the first stator blade and the second stator blade are adjacent to each other via a gap along the rotation axis direction. The fan device according to any one of claims 10 to 14,
The fan apparatus, wherein the outer frame body, the first support body, and the first stationary blade are formed as a continuous member by injection molding or die casting.

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