JP2019094811A - Air blowing apparatus - Google Patents

Abstract

To provide an air blowing apparatus capable of changing its wind direction and lengthening its blowing distance.SOLUTION: An air blowing apparatus 1 includes a rotor blade 10 having a plurality of rotary vanes 11 arrayed in the peripheral direction with a central axis C as a center, a stationary part 30 arranged on one axial side of the rotor blade, a movable part 60 arranged on one axial side of the stationary part, and a drive part having an output shaft 41 arranged coaxially with the central axis, and mounted on the movable part. The rotor blade is rotated with the central axis as the center to generate an air flow. The stationary part has a plurality of first vanes 31 for straightening the air flow generated by the rotor blade, and the movable part has a plurality of second vanes 61 for adjusting the direction of the air flow passing through the stationary part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a blower.

  The fan disclosed in Japanese Patent Laid-Open No. 2015-148176 includes a main body case, an air blowing means, a wind direction changing means, and a rotating means. The main body case has an inlet and an outlet. The air taken in from the suction port is blown to the blowout port by the blowing means. Wind direction changing means is rotatably attached to the air outlet. The wind direction changing means includes a wind direction changing unit. The wind direction changing portion has a disk-shaped wind direction changing main plate portion, and is provided with a plurality of radially extending plate shape wind direction changing plate portions on the periphery of the wind direction changing main plate portion. At the tip of the wind direction changing plate portion, a number of tube portions are provided. The rotating means rotates a gear by a geared motor as one example. This gear meshes with the cylinder portion, and the wind direction changing means rotates with the rotation of the gear.

JP, 2015-148176, A

  For example, in the indoor unit of the air conditioner, a function is required to change the direction of the wind blown out from the indoor unit during cooling and heating. When the indoor unit is attached to the side wall of the room, it is preferable that the wind is blown downward from the indoor unit during heating. On the other hand, at the time of cooling, the wind is preferably blown out, for example, from the indoor unit in the horizontal direction or upward. Further, in the air conditioner, it is preferable that the air blowing distance is longer than that of the fan.

  An object of the present invention is to provide a blower that can change the wind direction and can increase the blowing distance.

  An exemplary air blower according to the present invention comprises: a moving blade having a plurality of rotating blades arranged circumferentially about a central axis; a stationary portion disposed on one axial side of the moving blade; and the stationary portion A movable portion disposed on one side in the axial direction of the shaft, and an output shaft coaxially disposed with the central axis, and a drive portion attached to the movable portion, the moving blade having the central axis The stationary unit includes a plurality of first blades that rectify the airflow generated by the moving blades, and the movable unit has the direction of the airflow that has passed through the stationary unit. It has a plurality of second blades to be adjusted, and the plurality of first blades and the plurality of second blades are respectively spaced apart in the circumferential direction, and the movable portion is a plurality of the second blades A first imaginary plane including the other end in the axial direction of the Vignetting, a plurality of the second blade extends axially inclined with respect to the first virtual plane.

  The exemplary present invention provides a blower that can change the wind direction and can increase the blowing distance.

FIG. 1 is a perspective view of a blower according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the blower according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of a blower according to an embodiment of the present invention. FIG. 4 is a plan view showing the stationary portion and the periphery thereof. FIG. 5 is a perspective view showing the structure around the support portion. FIG. 6 is a plan view of the movable portion. FIG. 7 is a cross-sectional view showing the movable part of the modification. FIG. 8 is a plan view of the movable portion along a direction in which the second blade inclines with respect to the first virtual plane. FIG. 9A is a diagram for explaining the action of the movable part. FIG. 9B is a diagram for explaining the action of the movable part. FIG. 10 is a schematic view showing the relationship between the first blade support and the second blade support.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, a direction parallel to the central axis C which is the rotation center of the moving blade 10 shown in FIG. 3 is “axial direction”, a direction orthogonal to the central axis C is “radial direction”, and the central axis C is the center. The direction along the arc is referred to as "circumferential direction". Further, in this specification, the axial direction is defined as the front-rear direction, and the movable portion 60 side with respect to the moving blade 10 is defined as the front side. In the present application, the shape and positional relationship of each part will be described using this front-rear direction. However, there is no intention of limiting the direction at the time of use of the air blower which concerns on this invention by the definition of this front-back direction.

  FIG. 1 is a perspective view of a blower 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the air blower 1 according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of the air blower 1 according to the embodiment of the present invention. As shown in FIGS. 1 to 3, the blower 1 includes a moving blade 10, a stationary unit 30, a drive unit 40, and a movable unit 60. The blower 1 further includes a moving blade motor 20 and a support 50.

  The moving blade 10 has a plurality of rotating blades 11. The plurality of rotary blades 11 are arranged circumferentially about the central axis C. In detail, the moving blade 10 has a cup-shaped boss 12 which opens forward. Each rotary blade 11 extends from the outer surface of the boss 12 in the direction including the radial component. The rotary vanes 11 and the bosses 12 are made of, for example, resin or metal. It is preferable that the rotary blade 11 and the boss 12 be a single member. The moving blade 10 constitutes a so-called axial fan. The moving blade 10 generates an air flow by rotation about the central axis C. In the present embodiment, the moving blade 10 rotates clockwise in plan view from the axial front side. The rotation of the moving blade 10 generates an air flow from the rear to the front.

  The moving blade motor 20 has a shaft 21 extending in the front-rear direction along the central axis C. In the present embodiment, the shaft 21 is columnar. However, the shaft 21 may be cylindrical. The shaft 21 is made of, for example, metal. The moving blade motor 20 has a stator and a rotor (not shown). The stator is an armature. The rotor has a magnet and radially faces the stator. The shaft 21 is fixed to the rotor. By supplying power to the stator, a rotational torque is generated in the rotor, and the shaft 21 rotates around the central axis C together with the rotor. The rotation axis of the moving blade motor 20 is coaxial with the central axis C. In the present embodiment, the moving blade motor 20 is an inner rotor type motor in which the rotor is positioned radially inward of the stator. However, the moving blade motor 20 may be an outer rotor type motor in which the rotor is located radially outward of the stator.

  The moving blade motor 20 is disposed on one side in the axial direction of the moving blade 10. That is, the moving blade motor 20 is disposed on the front side of the moving blade 10. In detail, a part of the moving blade motor 20 is located inside the boss 12. The rear end of the shaft 21 is fixed to the boss 12. For this reason, the moving blade 10 rotates with the shaft 21. That is, the moving blade motor 20 rotates the moving blade 10. In the present embodiment, the shaft 21 is indirectly attached to the boss 12 via the attachment member 13. The mounting member 13 is composed of at least one member. However, the shaft 21 may be directly attached to the boss 12 by, for example, press fitting.

  The stationary unit 30 is disposed on one side in the axial direction of the moving blade 10. That is, the stationary unit 30 is disposed on the front side of the moving blade 10. FIG. 4 is a plan view showing the stationary unit 30 and its periphery. FIG. 4 is a view as viewed from the front side in the axial direction. As shown in FIGS. 2 to 4, the stationary unit 30 has a plurality of first blades 31 and a first blade support 32. The stationary part 30 further comprises a housing 34. The stationary unit 30 is made of, for example, a resin. In the present embodiment, the plurality of first blades 31, the first blade support portion 32, and the housing 34 are a single member. However, at least one of these may be configured separately from the other, and the material may be different.

  The blower 1 further includes a cylindrical portion 70 extending in the axial direction. In the present embodiment, the stationary portion 30 and the cylindrical portion 70 are a single member. However, the stationary unit 30 and the cylinder unit 70 may be configured as separate members, and the materials may be different.

  The plurality of first blades 31 rectify the air flow generated by the moving blades 10. The plurality of first blades 31 are arranged at intervals in the circumferential direction. In the present embodiment, the plurality of first blades 31 are arranged at equal intervals in the circumferential direction. The shapes of the plurality of first blades 31 are the same. As shown in FIG. 4, the first blade 31 has a curved shape with different positions in the circumferential direction between the radially inner side and the radially outer side. Specifically, as the first blades 31 move radially outward from the central axis C, the displacement of the circumferential position increases in the direction opposite to the rotational direction of the moving blade 10. Thus, the air flow generated by the moving blades 10 can flow without being blocked by the first blades 31. As a result, the blowing distance of the blower 1 can be increased.

  As shown in FIG. 4, the first blade 31 has an inclined surface 31 a intersecting with the axial direction. The inclined surface 31 a changes in inclination angle with respect to the axial direction from one side to the other side in the axial direction. In the present embodiment, the front end portion of the first blade 31 is substantially parallel to the axial direction, and the inclination angle of the inclined surface 31 a is substantially zero. The inclined surface 31 a gradually increases in inclination angle with respect to the axial direction from the front side to the rear side (twist structure). When the first blade 31 has such a twist structure, the air flow generated by the rotation of the moving blade 10 is collected by the first blade 31, and the static pressure is improved. As a result, the blowing distance of the blower 1 can be increased.

  The first blade support portion 32 is connected to the radially inner end of the first blade 31. The first blade support portion 32 is annular. In the present embodiment, the first blade support portion 32 is annular. The first blade 31 is connected to the outer surface of the first blade support portion 32, and extends in the direction having the radial component. A housing 34 is provided at the rear of the first blade support 32. The housing 34 has a concave shape that is recessed rearward, and is connected to the rear end of the first blade support portion 32.

  As shown in FIG. 3, the moving blade motor 20 is disposed radially inward of the first blade support portion 32 and the housing 34. The rear end of the bucket motor 20 is supported by the housing 34. An outer periphery of the rotor blade motor 20 is surrounded by the first blade support portion 32 and the housing 34. The front portion of the moving blade motor 20 is located forward of the first blade support portion 32 and the outer periphery is not surrounded by the first blade support portion 32 and the housing 34. As shown in FIG. 4, the rear end portion of the housing 34 has a shaft hole 34 a penetrating in the front-rear direction. The shaft 21 projects rearward of the housing 34 through the shaft hole 34a. By projecting the shaft 21 to the rear of the housing 34, the boss 12 can be fixed to the rear end of the shaft 21.

  In the present embodiment, as shown in FIG. 3, the moving blade motor 20 is supported by the housing 34 via the elastic member 2. Thereby, it is possible to suppress that the vibration generated by the driving of the moving blade motor 20 is transmitted to the first blade 31 through the housing 34.

  The cylindrical portion 70 is connected to the radially outer end of the plurality of first blades 31. In other words, the radially outer end portion of the first blade 31 is connected to the inner peripheral surface of the cylindrical tubular portion 70. The plurality of first blades 31 and the first blade support portion 32 are located in the cylindrical portion 70. The movable portion 60 is located inside the cylindrical portion 70. In addition, a part of the moving blade 10, the moving blade motor 20, the drive unit 40, and the support unit 50 are also located in the cylindrical unit 70. The moving blade 10 is located behind the plurality of first blades 31. The movable portion 60 is located in front of the plurality of first blades 31.

  At the rear end of the cylindrical portion 70, a flange portion 71 protruding in the radial direction is provided. In the present embodiment, the outer shape of the flange portion 71 is rectangular in plan view from the axial direction. However, the outer shape of the flange portion 71 is not limited to this, and may be circular or the like in plan view from the axial direction. In addition, the plurality of flanges may have a shape projecting outward in the radial direction. The flange part 71 is utilized, for example, when assembling the air blower 1 in the housing | casing (not shown) of the indoor unit of an air conditioner.

  The drive unit 40 is disposed in front of the moving blade motor 20. The drive unit 40 is attached to the movable unit 60. Thus, the drive unit 40 can move the movable unit 60. In the present embodiment, the drive unit 40 is a motor. In detail, the drive unit 40 is a stepping motor. The drive unit 40 has an output shaft 41 coaxially arranged with the central axis C. The output shaft 41 is attached to a movable unit 60 disposed in front of the drive unit 40. The movable portion 60 rotates about the central axis C with the rotation of the output shaft 41. In the present embodiment, since the drive unit 40 is a stepping motor, the rotation angle of the movable unit 60 can be accurately controlled.

  The support unit 50 supports the moving blade motor 20 and the drive unit 40. In detail, the drive part 40 is attached to the axial direction one side of the support part 50. The moving blade motor 20 is attached to the other side of the support 50 in the axial direction. That is, the drive unit 40 is attached to the front of the support unit 50 and the moving blade motor 20 is attached to the rear. According to this configuration, the moving blade motor 20 and the drive unit 40 can be supported using a common part, and the number of parts can be reduced. The support part 50 can be comprised, for example with resin. However, the support 50 may be made of another material such as metal.

  FIG. 5 is a perspective view showing the structure around the support portion 50. As shown in FIG. As shown in FIGS. 2 and 5, the support 50 has an annular main body 51 and a plurality of legs 52. The plurality of legs 52 extend radially outward from the main body 51. In the present embodiment, the number of the plurality of legs 52 is three. However, this number may be changed. The plurality of legs 52 are arranged at equal intervals in the circumferential direction. Each leg 52 has a screw recess 53 that is recessed radially inward at the radial tip. The support portion 50 has two pillar portions 54 that project axially forward from the front surface of the main body portion 51. The pillar portion 54 has an axially extending screw hole. The drive unit 40 disposed in front of the support unit 50 is attached to the two pillars 54 using screws.

  As shown in FIG. 3, the moving blade motor 20 has a convex portion 22 projecting forward on the front side. The convex portion 22 is cylindrical. For example, a bearing that rotatably supports the shaft 21 is disposed inside the protrusion 22. An annular elastic member 2 is fitted on the outer periphery of the convex portion 22. The elastic member 2 is, for example, a rubber member. The elastic member 2 is not limited to an annular shape, and may be, for example, a cup shape. The convex portion 22 in which the elastic member 2 is fitted is fitted in the hole 51 a of the main body 51. By fixing the support portion 50 to the stationary portion 30 in this state, the moving blade motor 20 is also fixed to the stationary portion 30. The moving blade motor 20 is attached to the support 50 via the elastic member 2. For this reason, transmission of the vibration of the moving blade motor 20 to the drive unit 40 can be suppressed.

  In detail, the blower 1 further includes a support 80 that axially extends between the stationary portion 30 and the support 50 in the axial direction. In the present embodiment, the support 80 is a single member with the stationary portion 30. The support 80 extends forward from the front surface of the first blade support 32. Three supports 80 are provided at equal intervals in the circumferential direction according to the number of legs 52. If the number of legs 52 is changed, the number of supports 80 may also be changed. The support 80 has an axially extending screw hole. The support portion 50 is screwed to the stationary portion 30 by aligning the positions of the three supports 80 and the three legs 52 and screwing the screw recess 53 and the screw holes of the support 80. . Along with this, the moving blade motor 20 is fixed to the stationary unit 30.

  In addition, although the support stand 80 and the stationary part 30 were made into the single member in this embodiment, it may change to this, and the support stand 80 and the support part 50 may be made into the single member. In this case, the support 80 may be configured to project rearward from the rear surface of each leg 52. The support 80 may have a through hole extending in the axial direction, and the stationary portion 30 may be provided with a screw hole. The support 80 may be a separate member from the stationary unit 30 and the support 50.

  By providing the support stand 80, the position of the drive unit 40 attached to the support unit 50 can be made closer to the movable unit 60 side. Thereby, the length of the output shaft 41 attached to the movable portion 60 can be shortened. By suppressing an increase in the length of the output shaft 41, misalignment of the output shaft 41 with respect to the central axis C can be suppressed, and blurring during rotation of the movable portion 60 can be suppressed.

  FIG. 6 is a plan view of the movable portion 60. FIG. FIG. 6 is a view of the movable portion 60 as viewed from the front side in the axial direction. The movable portion 60 is disposed on one side of the stationary portion 30 in the axial direction. That is, the movable portion 60 is disposed on the front side of the stationary portion 30. As shown in FIGS. 2 and 6, the movable portion 60 has a plurality of second blades 61, a second blade support portion 62, and a ring portion 63. In the present embodiment, the plurality of second blades 61, the second blade support portion 62, and the ring portion 63 are a single member. The movable portion 60 is made of, for example, a resin. However, at least one of the plurality of second blades 61, the second blade support portion 62, and the ring portion 63 may be configured as separate members, and the material may be different.

  The plurality of second blades 61 adjust the direction of the air flow that has passed through the stationary unit 30. The plurality of second blades 61 are arranged at intervals in the circumferential direction. In detail, the plurality of second blades 61 adjust the direction of the air flow by the rotation of the movable unit 60 by the drive unit 40. Details of this point will be described later.

  As shown in FIG. 3, the movable portion 60 has the first virtual plane VP1 including the end on the other axial side (axial rear side) of the plurality of second blades 61 orthogonal to the axial direction as the output shaft 41. It is attached. In the present embodiment, among the plurality of second blades 61 included in the movable portion 60, the end portion in the axial direction rear side of all the second blades 61 is included in the first virtual plane VP1. In the present embodiment, the axially rear end portion of each second blade 61 is a flat surface, and the first virtual plane VP1 includes the end surface.

  Note that the end portion on the axial direction rear side of a part of the second blades 61 among the plurality of second blades 61 included in the movable portion 60 may not be included in the first virtual plane VP1. FIG. 7 is a cross-sectional view showing a movable portion 60A of a modification. The movable portion 60A has a second blade 61A, a second blade support portion 62A, and a ring portion 63A. In the movable portion 60A of the modified example, a first virtual plane VP1 including an end portion in the axial direction rear side of a part of the second blades 61A is orthogonal to the axial direction. However, the axial rear end portion of the other part of the second blades 61A is not orthogonal to the axial direction, but is inclined. That is, of the plurality of second blades 61A of the movable portion 60A, an end portion on the axial direction rear side of a part of the second blades 61A is not included in the first virtual plane VP1. The present invention also includes such a configuration.

  Further, the axially rear end portion of each second blade 61 may be other than a flat surface, such as a convex surface. For example, when the axially rear end of the second blade 61 is a convex surface, the top may be included in the first virtual plane VP1.

  The plurality of second blades 61 extend in the axial direction at an angle with respect to the first virtual plane VP1. In the present embodiment, all the second blades 61 extend in the axial direction with an inclination in the same direction with respect to the first virtual plane VP1. The first virtual plane VP1 is orthogonal to the axial direction. For this purpose, the plurality of second blades 61 are inclined with respect to the axial direction. The inclination angle with respect to the axial direction of all the 2nd blade | wings 61 is the same. In the modification shown in FIG. 7 as well, all the second blades 61A extend in the axial direction while being inclined in the same direction with respect to the first virtual plane VP1.

  In the present embodiment, the air flow generated by the rotation of the moving blade 10 can be efficiently sent far in a predetermined direction by the plurality of first blades 31 and the plurality of second blades 61. And in this embodiment, since the plurality of second blades 61 are inclined with respect to the axial direction, the direction of the second blades 61 can be changed by rotating the movable portion 60 by the drive unit 40. . That is, the blower 1 of the present embodiment can blow the air by changing the direction of the air flow generated by the rotation of the moving blade 10. Further, in the present embodiment, the axial length of the movable portion 60 can be reduced compared to the case where the entire movable portion is inclined in order to incline the plurality of second blades 61 with respect to the axial direction. That is, according to the present embodiment, the axial thickness of the blower 1 can be reduced.

  As shown in FIG. 3, a second virtual plane VP2 including an end portion on one axial side (axial front side) of the plurality of second blades 61 is parallel to the first virtual plane VP1. According to this, the thickness of the movable portion 60 can be reduced because the first virtual plane VP1 and the second virtual plane VP2 are orthogonal to the axial direction. In the present embodiment, among the plurality of second blades 61 of the movable portion 60, the end portion on the front side in the axial direction of all the second blades 61 is included in the second virtual plane VP2. In the present embodiment, the axially front end portion of each second blade 61 is a flat surface, and the second virtual plane VP2 includes the end surface.

  Note that the end portion on the front side in the axial direction may not be included in the second virtual plane VP <b> 2 of some of the second blades 61 among the plurality of second blades 61 of the movable portion 60. For example, in the movable portion 60A of the modified example shown in FIG. 7, the second virtual plane VP2 including the end portion on the front side in the axial direction of a part of the second blades 61A is orthogonal to the axial direction. However, the axial forward end of the other second blade 61A is not orthogonal to the axial direction, but is inclined. That is, of the plurality of second blades 61A included in the movable portion 60A, the end portion on the front side in the axial direction of some of the second blades 61A is not included in the second virtual plane VP2. The present invention also includes such a configuration. Also in the movable portion 60A, the first virtual plane VP1 and the second virtual plane VP2 are parallel to each other.

  Further, the axially front end portion of each second blade 61 may be other than a flat surface, such as a convex surface. For example, when the axially front end of the second blade 61 is a convex surface, the top may be included in the second virtual plane VP2.

  FIG. 8 is a plan view of the movable portion 60 along the direction in which the second blade 61 inclines with respect to the first virtual plane VP1. As shown in FIG. 8, the width of the second blade 61 in the circumferential direction is constant in plan view along the direction in which the second blade 61 is inclined with respect to the first virtual plane VP1. That is, in the present embodiment, the second blade 61 extends straight along the inclination direction of the second blade 61. For this reason, the wind passing through the plurality of second blades 61 can be made to be a straight wind directed in a predetermined direction, and the wind passing through the movable portion 60 can be directed to a predetermined direction and reach far.

  As shown in FIG. 6, the second blade 61 has a curved shape with different positions in the circumferential direction between the radially inner side and the radially outer side. In the present embodiment, as the second blades 61 move radially outward from the central axis C, the circumferential position of the second blades 61 deviates in the direction opposite to the rotational direction of the moving blade 10. That is, the bending directions of the first blade 31 and the second blade 61 are the same. According to this, the wind rectified by the first blade 31 can flow without being blocked by the second blade 61. As a result, the blowing distance of the blower 1 can be increased.

  As shown in FIGS. 6 and 8, the second blade support portion 62 has an outer peripheral surface connected to the radially inner end of the second blade 61. The second blade support portion 62 has a cup shape that opens rearward. The second blade 61 is connected to the outer peripheral surface of the second blade support portion 62 and extends in the direction having the radial component.

  As shown in FIG. 3, the outer peripheral surface of the second blade support portion 62 is inclined in the same direction as the second blade 61 with respect to the first virtual plane VP1. In detail, the magnitude | size of the inclination with respect to the axial direction of the outer peripheral surface of the 2nd blade | wing support part 62 and the 2nd blade | wing 61 is the same. For this reason, the direction of the wind which blows off from the movable part 60 is arrange | equalized in the same direction, and the ventilation distance which goes straight in a predetermined direction can be extended.

  Further, both axial end surfaces of the second blade support portion 62 are parallel to the first virtual plane VP1. That is, both end surfaces in the axial direction of the second blade support portion 62 are also parallel to the second virtual plane VP2 and orthogonal to the axial direction. The axial length of the second blade support portion 62 is equal to or less than the axial distance between the first virtual plane VP1 and the second virtual plane VP2. According to this, the axial thickness of the movable portion 60 can be reduced, and the blower 1 can be miniaturized. In the present embodiment, the axial length of the second blade support portion 62 is the same as the axial distance between the first virtual plane VP1 and the second virtual plane VP2.

  As shown in FIG. 6, the second blade support portion 62 has a recess 62 a that is recessed rearward at the center of the front surface. An output shaft hole 62b penetrating in the axial direction is provided on the bottom surface of the recess 62a. The output shaft 41 is passed through the output shaft hole 62a. Thereby, the movable portion 60 is attached to the drive portion 40. The rotation of the output shaft 41 rotates the movable portion 60. Since the output shaft hole 62b is provided in the recess 62a, the output shaft 41 can be prevented from protruding from the front surface of the second blade support portion 62.

  The ring portion 63 connects the radially outer ends of the plurality of second blades 61. In the present embodiment, the ring portion 63 is annular. By providing the ring portion 63, the strength of the plurality of second blades 61 can be improved, and the deflection of the second blade 61 can be suppressed during rotation of the moving blade 10 and rotation of the movable portion 60.

  As shown in FIG. 3, the inner circumferential surface of the ring portion 63 is inclined in the same direction as the second blade 61 with respect to the first virtual plane VP1. In detail, the magnitude | size of the inclination with respect to the axial direction of the inner peripheral surface of the ring part 63 and the 2nd blade | wing 61 is the same. For this reason, the direction of the wind which blows off from the movable part 60 is arrange | equalized in the same direction, and the ventilation distance which goes straight in a predetermined direction can be extended.

  The inner circumferential surface of the cylindrical portion 70 and the outer circumferential surface of the ring portion 63 are diametrically opposed via a gap. The gap is preferably as small as possible. Thus, the air flow that has passed through the plurality of first blades 31 can be suppressed from passing through the outside of the movable portion 60. That is, it is possible to suppress the reduction of the air volume for flowing in the predetermined direction.

  The inner circumferential surface of the cylindrical portion 70 and the outer circumferential surface of the ring portion 63 may be in contact with each other. In this case, the possibility that the air flow having passed through the plurality of first blades 31 passes through the outside of the movable portion 60 can be further reduced. When the inner peripheral surface of the cylindrical portion 70 and the outer peripheral surface of the ring portion 63 contact, in order to smoothly rotate the movable portion 60, the space between the inner peripheral surface of the cylindrical portion 70 and the outer peripheral surface of the ring portion 63 It is preferred to reduce the friction. In order to reduce friction, for example, at least one of the cylindrical portion 70 and the ring portion 63 may be made of a low friction material. Moreover, in order to reduce friction, for example, a slip material that improves slipperiness may be applied to at least one of the inner circumferential surface of the cylindrical portion 70 and the outer circumferential surface of the ring portion 63.

  9A and 9B are diagrams for explaining the action of the movable unit 60. FIG. 9A and 9B are cross sectional views. In addition, in FIG. 9B, the one part structure except the movable part 60 of the air blower 1 is abbreviate | omitted.

  In FIG. 9A, the second blade 61 is inclined downward with respect to the first virtual plane VP1 expanding in the vertical direction. The inner peripheral surfaces of the second blade support portion 62 and the ring portion 63 are also inclined downward with respect to the first virtual plane VP1. For this reason, the air flow sent from the moving blade 10 is blown out obliquely downward along the outer peripheral surface of the second blade 61, the second blade support portion 62, and the inner peripheral surface of the ring portion 63. The state shown in FIG. 9A is suitable, for example, when the air conditioner is used as heating.

  FIG. 9B shows a state where the movable unit 60 is rotated 180 ° around the central axis C from the state shown in FIG. 9A by the drive of the drive unit 40. In FIG. 9B, the second blade 61 is inclined upward with respect to the first virtual plane VP1 expanding in the vertical direction. The inner peripheral surfaces of the second blade support portion 62 and the ring portion 63 are also inclined upward with respect to the first virtual plane VP1. For this reason, the air flow sent from the moving blade 10 is blown out obliquely upward along the outer peripheral surface of the second blade 61, the second blade support portion 62, and the inner peripheral surface of the ring portion 63. That is, as compared with the case of FIG. 9A, the direction in which the air flow sent from the moving blade 10 is blown out is changed. The state shown in FIG. 9B is suitable, for example, when the air conditioner is used as a cooling.

  FIG. 10 is a schematic view showing the relationship between the first blade support portion 32 and the second blade support portion 62. As shown in FIG. As shown in FIG. 10, in a plan view from the axial direction, the outer periphery 32 f of the end (front end) of one axial side of the first blade support 32 is the other axial side of the second blade support 62. It is preferable to be located radially outside the outer periphery 62 r of the end portion (rear end portion). Thus, the air flow that has passed through the plurality of first blades 31 can flow without being blocked by the second blade support portion 62. As a result, the blowing distance of the blower 1 can be increased. Further, noise due to the wind hitting the second blade support portion 62 is reduced.

  The outer periphery 32 f of the front end portion of the first blade support portion 32 may overlap with the outer periphery 62 r of the rear end portion of the second blade support portion 62 in a plan view from the axial direction. Also in this case, the air flow that has passed through the plurality of first blades 31 can flow without being blocked by the second blade support portion 62. As a result, the blowing distance of the blower 1 can be increased. Further, noise due to the wind hitting the second blade support portion 62 is reduced.

  The configurations of the embodiment described above and the suitably described modifications are merely examples of the present invention. The configurations of the embodiment and the modifications may be appropriately changed without departing from the technical concept of the present invention. Moreover, several embodiment and modification may be implemented in combination as much as possible.

  For example, in the embodiment described above, the moving blade 10 and the movable portion 60 are moved using separate drive devices, but even if the moving blade 10 and the movable portion 60 are driven by the same drive device Good.

  The present invention can be applied to various devices having a motor for rotating an axial fan, such as home appliances, OA devices, and in-vehicle devices.

DESCRIPTION OF SYMBOLS 1 ... Air blower 2 ... Elastic member 10 ... Moving blade 11 ... Rotatable blade 20 ... Motor for moving blade 30 ... Stationary part 31 ... 1st blade 31a ... Inclination Surface 32 First blade support portion 40 Drive portion 41 Output shaft 50 Support portion 60 Movable portion 61 Second blade 62 Second blade support portion 63: Ring portion 70: Tubular portion 80: Support base C: Central axis VP1: First virtual plane VP2: Second virtual plane

Claims (13)

A blower and
A moving blade having a plurality of rotating blades arranged circumferentially about a central axis;
A stationary portion disposed on one side in the axial direction of the moving blade;
A movable portion disposed on one side in the axial direction of the stationary portion;
A drive unit having an output shaft coaxially arranged with the central axis, the drive unit being attached to the movable unit;
Have
The moving blade generates an air flow by rotation about the central axis,
The stationary portion has a plurality of first blades that rectify the air flow generated by the moving blades,
The movable portion has a plurality of second blades that adjust the direction of the air flow that has passed through the stationary portion,
The plurality of first blades and the plurality of second blades are respectively spaced apart in the circumferential direction,
The movable portion is attached to the output shaft such that a first virtual plane including the other axial end of the plurality of second blades is orthogonal to the axial direction,
The plurality of second blades extend in the axial direction obliquely with respect to the first virtual plane.   The air blower according to claim 1, wherein the second blade has a constant circumferential width in a plan view along a direction in which the second blade is inclined with respect to the first virtual plane.   The air blower according to claim 1, wherein a second imaginary plane including an end on one axial side of the plurality of second blades is parallel to the first imaginary plane. The movable portion includes a second blade support portion having an outer peripheral surface connected to a radially inner end of the second blade,
Both axial end surfaces of the second blade support portion are parallel to the first virtual plane,
The air blower according to claim 3, wherein an axial length of the second blade supporting portion is equal to or less than an axial distance between the first virtual plane and the second virtual plane. The movable portion includes a second blade support portion having an outer peripheral surface connected to a radially inner end of the second blade,
The air blower according to any one of claims 1 to 3, wherein an outer peripheral surface of the second blade support portion is inclined in the same direction as the second blade with respect to the first virtual plane. The stationary portion includes a first blade support portion connected to a radial inner end of the first blade,
In a plan view from the axial direction, an outer periphery of an end of the first blade support on one side in the axial direction overlaps an outer periphery of an end on the other side of the second blade support in the axial direction; The air blower according to claim 4 or 5, which is located radially outward of the outer periphery of the other axial end of the blade support. The movable portion has a ring portion connecting the radially outer ends of the plurality of second blades,
The air blower according to any one of claims 1 to 6, wherein an inner circumferential surface of the ring portion is inclined in the same direction as the second blade with respect to the first virtual plane. It further has an axially extending cylindrical portion connected to the radially outer end of the plurality of first blades,
The movable portion is located in the cylinder portion,
The air blower according to claim 7, wherein an inner circumferential surface of the cylindrical portion and an outer circumferential surface of the ring portion are in contact with each other or radially opposed to each other through a gap. The first blade and the second blade have curved shapes whose circumferential positions differ between the radially inner side and the radially outer side,
The air blower according to any one of claims 1 to 8, wherein the bending directions of the first blade and the second blade are the same. The first blade has an inclined surface intersecting with the axial direction,
The air blower according to any one of claims 1 to 9, wherein an inclination angle with respect to the axial direction of the inclined surface changes from one axial direction to the other side. A moving blade motor that rotates the moving blade;
A supporting portion to which the driving portion is attached on one side in the axial direction and the moving blade motor is attached on the other side in the axial direction;
The air blower according to any one of claims 1 to 10, further comprising:   The air blower according to claim 11, further comprising: a support base extending axially between the stationary portion and the support portion.   The air blower according to claim 11, wherein the moving blade motor is attached to the support portion via an elastic member.

Images