WO2017086125A1

WO2017086125A1 - Fan unit and outdoor unit

Info

Publication number: WO2017086125A1
Application number: PCT/JP2016/082003
Authority: WO
Inventors: 俊輔藤
Original assignee: 日本電産テクノモータ株式会社
Priority date: 2015-11-18
Filing date: 2016-10-28
Publication date: 2017-05-26
Also published as: JP2019011872A

Abstract

This fan unit of an outdoor unit comprises: a motor; an impeller that rotates by power from the motor; and a panel arranged forward of the impeller. A stationary part of the motor is fixed to the panel. Airflow created by the rotation of the impeller passes through a plurality of through holes provided in the panel. The fan unit has, on the peripheral edge of the panel, a flow-regulating projection that projects in the axial direction. The airflow created by the impeller is regulated by the flow-regulating projection. Thus, it is possible to fix the motor to the panel and to prevent the air permeability of the panel from deteriorating.

Description

Fan unit and outdoor unit

The present invention relates to a fan unit used for an outdoor unit of an air conditioner and an outdoor unit of the air conditioner.

Conventionally, an outdoor unit of an air conditioner has a housing having an intake port and an exhaust port, a fan motor disposed between the intake port and the exhaust port, a heat exchanger attached to the intake port, and an exhaust port. And an attached panel. The structure of a conventional outdoor unit is described in, for example, Japanese Patent Application Laid-Open No. 09-159216. *

In a general outdoor unit, a fan motor support called a motor bracket or a motor stay is used to fix the fan motor to the housing. Japanese Patent Application Laid-Open No. 09-159216 discloses an outdoor unit in which such a fan motor support is disposed on the downstream side or the upstream side of the impeller of the fan motor (FIGS. 1A and 2).
JP 09-159216 A

On the other hand, in recent years, there is a demand for thinner outdoor units. When the fan motor is fixed to the housing using the fan motor support, a space for disposing the fan motor support is required between the impeller of the fan motor and the exhaust port or the intake port. Therefore, it is difficult to further reduce the thickness of the outdoor unit. *

As a method for further reducing the thickness of the outdoor unit, a method in which the fan motor support is omitted and the fan motor is fixed to the panel is conceivable. However, when the motor is fixed to the panel, the air permeability of the panel may deteriorate due to the vibration of the panel. *

The objective of this invention is providing the technique which can send out the airflow inside an outdoor unit to the exterior efficiently, making an outdoor unit thin.

An exemplary first invention of the present application is a fan unit used in an outdoor unit of an air conditioner, and includes a motor, an impeller that rotates around a central axis that extends forward and backward by the power of the motor, and a front of the impeller. And a panel having a plurality of through holes that allow airflow generated by rotation of the impeller to pass therethrough, and the motor has a stationary portion having a stator and a magnet positioned radially outward from the stator. A rotating part, and the stationary part is fixed to the panel, and has a rectifying protrusion protruding in the axial direction on a peripheral edge of the panel.

According to the first exemplary invention of the present application, the airflow generated from the impeller can be rectified by the rectifying protrusion. For this reason, it can suppress that a motor is fixed to a panel and the air permeability of a panel deteriorates.

FIG. 1 is a perspective view of the outdoor unit. FIG. 2 is a longitudinal sectional view of the outdoor unit. FIG. 3 is a front view of the panel. FIG. 4 is a rear view of the panel. FIG. 5 is a partial cross-sectional view of the panel. FIG. 6 is a perspective view of the panel. FIG. 7 is a longitudinal sectional view of an outdoor unit according to a modification. FIG. 8 is a longitudinal sectional view of an outdoor unit according to a modification.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the following description, the front-rear direction is defined with the rear side of the outdoor unit as “rear” and the exhaust side as “front”. In FIG. 1, FIG. 2, FIG. 7 and FIG. 8, the front and rear directions are indicated by arrows, with “F” for the front and “B” for the rear. *

FIG. 1 is a perspective view of an outdoor unit 1 according to an embodiment. FIG. 2 is a longitudinal sectional view of the outdoor unit 1. The outdoor unit 1 is an outdoor unit of an air conditioner, is used together with the indoor unit of the air conditioner, and is used for releasing indoor heat to the outside through the indoor unit. *

The outdoor unit 1 includes a housing 11, a fan unit 12, a heat exchanger 13, a power source 14, and a compressor not shown. The housing | casing 11 is a substantially rectangular parallelepiped housing | casing which accommodates the heat exchanger 13 and the impeller 3 mentioned later inside. The housing 11 has an exhaust port 111 on the front surface, that is, the front surface, and an intake port 112 on the rear surface, that is, the back surface. *

The fan unit 12 includes a motor 2, an impeller 3, and a panel 4. The impeller 3 is rotated around the central axis 9 extending in the front-rear direction by the power of the motor 2. The panel 4 covers the exhaust port 111. The panel 4 has a plurality of through holes 44 through which airflow generated by the rotation of the impeller 3 passes. The heat exchanger 13 is disposed so as to cover the intake port 112. The power supply 14 is a device that supplies a drive current to the motor 2. The power supply 14 and the motor 2 are electrically connected via a lead wire 15. In FIG. 1, the power supply 14 and the lead wire 15 are indicated by broken lines. *

When the motor 2 is driven, the impeller 3 rotates, and an airflow from the rear to the front is generated. Thereby, outside air is sucked into the housing 11 through the air inlet 112 and passes through the heat exchanger 13. The outside air is heated or cooled by exchanging heat with the refrigerant circulating in the heat transfer tube of the heat exchanger 13 and then discharged outside through the exhaust port 111. *

Next, the configuration of the fan unit 12 will be described with reference to FIGS. FIG. 3 is a front view of the panel 4 of the fan unit 12 used in the outdoor unit 1. FIG. 4 is a rear view of the panel 4. FIG. 5 is a partial cross-sectional view of the panel 4 taken along the line A-A ′ of FIGS. 3 and 4. In FIG. 4, illustration of a rectifying protrusion 70 described later is omitted. *

As described above, the fan unit 12 includes the motor 2, the impeller 3, and the panel 4. The motor 2 has a stationary part 21 and a rotating part 22. The stationary part 21 has a base part 211 and a stator 212. The rotating part 22 is supported by the stationary part 21 so as to be rotatable around the central axis 9 extending in the front-rear direction. The rotating unit 22 includes a shaft 221, a rotor cup 222, and a magnet 223. *

The base portion 211 includes a first fixing portion 51 that is fixed to a center portion 41 (described later) of the panel 4 and a substantially cylindrical second fixing portion 52 that extends rearward from the first fixing portion 51. The first fixing portion 51 extends perpendicular to the axial direction. Two bearing mechanisms 521 are provided on the inner peripheral portion of the second fixed portion 52. A part of the shaft 221 is housed inside the second fixing portion 52 in the radial direction, and is supported rotatably with respect to the second fixing portion 52 via the bearing mechanism 521. The bearing mechanism 521 of the present embodiment is a ball bearing having an outer ring fixed to the inner peripheral surface of the second fixing portion 52 and an inner ring fixed to the outer peripheral surface of the shaft 221. However, instead of the ball bearing, another type of bearing such as a sleeve bearing may be used. *

The stator 212 has a stator core 53 and a coil 54. The stator core 53 is made of a laminated steel plate in which electromagnetic steel plates such as silicon steel plates are laminated in the axial direction, for example. The stator core 53 is fixed to the outer peripheral surface of the second fixing portion 52. The stator core 53 has a plurality of teeth 531 protruding outward in the radial direction. The plurality of teeth 531 are arranged at substantially equal intervals in the circumferential direction. The coil 54 is configured by a conductive wire wound around each tooth 531. *

The shaft 221 is a substantially columnar member extending in the axial direction. A part including the front end of the shaft 221 is disposed inside the second fixing portion 52 of the base portion 211 in the radial direction. The rear end of the shaft 221 protrudes rearward from the rear end of the second fixing portion 52. *

The rotor cup 222 has a disc part 61 and a cylindrical part 62. The disc portion 61 is a plate-like portion that extends in the radial direction from the outer peripheral portion of the shaft 221. The vicinity of the rear end of the shaft 221 is fixed to the radially inner end of the disc portion 61. The cylindrical portion 62 is a substantially cylindrical portion that extends in the axial direction from the outer peripheral portion of the disc portion 61. The cylindrical portion 62 is located on the radially outer side of the magnet 223 and on the radially inner side of the impeller 3. *

The magnet 223 is a substantially annular magnet located on the radially outer side than the stator 212. The inner peripheral surface of the magnet 223 is opposed to the radially outer end surfaces of the plurality of teeth 531 in the radial direction. Further, N poles and S poles are alternately magnetized in the circumferential direction on the inner peripheral surface of the magnet 223. *

In place of the annular magnet 223, a plurality of magnets may be used. When a plurality of magnets are used, the plurality of magnets may be arranged in the circumferential direction so that the N poles and the S poles are alternately arranged. Further, the rotor cup 222 and the magnet 223 may be formed by a single plastic magnet. *

The impeller 3 has a plurality of blades 31 extending radially outward from the outer peripheral surface of the cylindrical portion 62 of the rotor cup 222. The impeller 3 is disposed in front of the heat exchanger 13 and in the rear of the panel 4. When the motor 2 is driven, the impeller 3 rotates around the central axis 9. *

The panel 4 is disposed at the exhaust port 111 of the housing 11. That is, the panel 4 is disposed perpendicular to the horizontal plane in front of the impeller 3. The panel 4 has a plurality of through holes 44 through which airflow generated by the rotation of the impeller 3 passes. The panel 4 prevents a user's finger from coming into contact with the impeller as a finger guard and prevents foreign matter from entering the housing 11 from the outside via the exhaust port 111. The panel 4 includes a central portion 41, a frame portion 42, a ventilation portion 43, one rib 60, and a rectifying protrusion 70. *

The central part 41 is a part that supports the stationary part 21 of the motor 2. Specifically, the base portion 211 is fixed to the central portion 41 by fitting the first fixing portion 51 of the base portion 211 into a recess provided on the back surface of the central portion 41. *

The frame portion 42 is a substantially annular portion disposed along the edge portion of the exhaust port 111 on the radially outer side of the central portion 41. *

The ventilation portion 43 is a substantially annular portion that extends radially outward of the central portion 41 and radially inward of the frame portion 42. The ventilation part 43 is provided with a plurality of through holes 44. *

As shown in FIGS. 3 and 4, in this embodiment, the shape of the through hole 44 viewed in the axial direction is a regular hexagon except for the through hole 44 adjacent to the center part 41 and the frame part 42. Thus, the rigidity of panel 4 can be improved because the shape of through-hole 44 is a polygon. Furthermore, when the shape of the through hole 44 is a regular hexagon, the rigidity of the panel 4 can be further improved. *

In the present embodiment, the ventilation portion 43 is formed by a partition portion 431 that extends perpendicularly to the axial direction and has a thickness in the axial direction. For this reason, the regular hexagonal through-hole 44 is formed by connecting the partition portions 431 in a honeycomb shape. *

The rib 60 extends from the outer peripheral portion of the central portion 41 toward the radially outer side. The width of the rib 60 in the circumferential direction is larger than the width of the other portion of the ventilation portion 43 viewed in the axial direction. That is, the circumferential width of the rib 60 is larger than the width of the partition portion 431. The width of the partition portion 431 here refers to the width in the direction perpendicular to the axial direction and perpendicular to the direction in which the partition portion 431 extends. *

In the present embodiment, the front end portion of the rib 60 has substantially the same axial position as the front end portion of the other portion of the ventilation portion 43. Further, the rear end portion of the rib 60 has substantially the same axial position as the rear end portion of the other part of the ventilation portion 43. That is, the rib 60 does not protrude in the axial direction from the other portions of the ventilation portion 43. *

When the panel 4 supports the motor 2, vibration during driving is easily transmitted from the motor 2 to the panel 4. However, in the fan unit 12, the panel 4 has the rib 60, so that the rigidity of the panel 4 is improved. Thereby, the vibration of the panel 4 at the time of the drive of the motor 2 can be suppressed. As a result, the deformation of the panel 4 can be suppressed. *

In the present embodiment, the through hole 44 is provided only in the ventilation portion 43. That is, the through hole 44 is provided in a region of the panel 4 excluding the central portion 41. In this way, a decrease in rigidity due to the through hole 44 is suppressed in the central portion 41 where the motor 2 is attached. Moreover, since the contact area of the motor 2 and the center part 41 increases,
The motor 2 can be firmly fixed to the panel 4. A cushioning material may be disposed between the base portion 211 of the motor 2 and the central portion 41 of the panel 4. If it does so, it will become difficult to transmit the vibration of the motor 2 by the panel 4. FIG.

The panel 4 of this embodiment is integrally formed of plastic. Therefore, the center part 41, the frame part 42, the ventilation part 43, and the rib 60 are integrally molded. However, the present invention is not limited to this. For example, the ventilation part may be a wire mesh formed of a wire-like metal. The rib 60 may be a separate member from the central portion 41, the frame portion 42, and the ventilation portion 43. *

In this embodiment, the outdoor unit 1 has a lead wire 15 that extends from the motor 2 and is connected to the power source 14. The stationary portion 21 of the motor 2 has a lead wire holding portion 213 that holds the lead wire 15. The lead wire holding part 213 is formed integrally with the base part 211. In FIG. 4, the outer peripheral surface of the rotor cup 222 of the motor 2, the lead wire holding portion 213, and a part of the lead wire 15 are indicated by broken lines. *

As shown in FIG. 4, the rib 60 has a holding groove 600 that is recessed forward from the rear end surface. The holding groove 600 extends along the direction in which the rib 60 extends. The holding groove 600 holds the lead wire 15 therein. Accordingly, a part of the lead wire 15 extending radially outward from the motor 2 via the lead wire holding portion 213 is disposed along the rib 60. *

By arranging the lead wire 15 along the rib 60, the lead wire 15 is prevented from overlapping the through hole 44 in the axial direction. Therefore, it is suppressed that the lead wire 15 obstructs the airflow. Thereby, it can suppress that the air volume discharged | emitted outside the outdoor unit 1 falls by the lead wire 15. FIG. Further, since the lead wire 15 is held in the holding groove 600, the positional deviation of the lead wire 15 can be suppressed. Furthermore, it can also be suppressed that the lead wire 15 contacts the impeller 3. *

Note that the rib 60 may not have the holding groove 600. For example, a snap-fit type fixing protrusion may be provided on the back side of the rib 60 and the lead wire 15 may be fixed by the fixing protrusion. Further, the lead wire 15 may be fixed to the back side of the rib 60 by other methods. *

As shown in FIG. 5, in the ventilation part 43, the partition part 431 which forms the through-hole 44 has the taper surface 432 on the back side. Thereby, the thickness of the vicinity of the rear end portion of the partition portion 431 decreases as it goes rearward. Therefore, when the wind generated by the impeller 3 reaches the rear end of the partition portion 431 of the ventilation portion 43, the wind is guided by the tapered surface 432 toward the through hole 44. As a result, the generation of noise due to the collision of the wind generated by the impeller 3 with the partition portion 431 is suppressed. *

The fan unit 12 has a rectifying protrusion 70 for rectifying the airflow passing through the panel 4. Hereinafter, the rectifying protrusion 70 of the fan unit 12 will be described. FIG. 6 is a perspective view of the panel 4 including the rectifying protrusion 70. *

The rectifying protrusion 70 is a plate-like part disposed on the periphery of the panel 4. As shown in FIGS. 2 and 6, the rectifying protrusion 70 of the present embodiment is an inner rectifying protrusion 71 that protrudes rearward in the axial direction from the rear surface of the panel 4 toward the motor 2. When the impeller 3 rotates, an airflow that flows forward from the impeller 3 and an airflow that spreads radially outward from the impeller 3 are generated. The inner rectification protrusion 71 rectifies the airflow spreading radially outward from the impeller 3 so as to go forward. *

In particular, the inner rectifying protrusion 71 of the present embodiment has an annular shape that is coaxial with the central axis 9. For this reason, the airflow spreading radially outward from the impeller 3 can be uniformly rectified forward. The inner rectifying protrusion 71 may have a hole or a slit through which the lead wire 15 connecting the motor 2 and the power source 14 passes. *

As shown in FIGS. 2 and 6, the inner rectifying protrusion 71 has a first protrusion 81, a second protrusion 82, and a third protrusion 83. In the present embodiment, the first protrusion 81, the second protrusion 82, and the third protrusion 83 are all annular. The first protrusion 81 extends rearward from the rear surface of the panel 4. The inner diameter of the first protrusion 81 gradually decreases as it goes rearward. The second protrusion 82 extends substantially parallel to the central axis 9 from the rear end of the first protrusion 81 toward the rear. The third protrusion 83 extends rearward from the rear end of the second protrusion 82. The inner diameter of the third protrusion 83 gradually increases toward the rear. At least a part of the impeller 3 and at least a part of the first protrusion 81, the second protrusion 82, or the third protrusion 83 overlap in the radial direction. *

The airflow spreading radially outward from the impeller 3 is smoothly rectified forward along the inner peripheral surface of the first protrusion 81. By increasing the diameter of the inner peripheral surface of the first protrusion 81 toward the front, the generation of noise due to the collision of the airflow with the first protrusion 81 is suppressed. If there is no third protrusion 83, part of the airflow spreading radially outward from the impeller 3 collides with the rear end portion of the inner rectifying protrusion 71. Thereby, an airflow is interrupted | blocked and a big noise can generate | occur | produce. However, in the present embodiment, a third protrusion 83 whose diameter increases as the inner peripheral surface moves rearward is provided at the rear end portion of the inner rectifying protrusion 71. For this reason, the noise which generate | occur | produces in the rear-end part of the inner side straightening protrusion 71 can also be reduced. *

The airflow flowing forward from the heat exchanger 13 toward the impeller 3 is first rectified radially inward by the third protrusion 83. Then, the airflow gathered radially inward is sent forward along the inner peripheral surface of the second protrusion 82 together with the forward airflow generated from the impeller 3. Thereafter, the airflow that has passed through the second protrusion 82 is smoothly forwarded along the first protrusion 81 whose diameter increases toward the front. *

As described above, in the structure of the present embodiment, the airflow in the outdoor unit 1 can be efficiently sent out to the outside by the inner rectifying protrusion 71. In particular, when the motor 2 is fixed to the panel 4, the panel 4 vibrates as the motor 2 rotates. Moreover, the impeller 3 vibrates with the vibration of the panel 4, and the airflow spreading radially outward increases. However, in the fan unit 12 of this embodiment, the airflow can be rectified forward by the rectifying protrusion 70. Therefore, the motor 2 can be fixed to the panel 4 and the airflow can be efficiently sent to the front of the panel 4. That is, the motor 2 is fixed to the panel 4 and the outdoor unit 1 can be made thin and the air permeability of the outdoor unit 1 can be compatible. *

It is preferable that the blade 31 of the impeller 3 is formed large as long as it does not contact the inner rectifying protrusion 71. In particular, if the inclination angle of the inner peripheral surface of the first protrusion 81 or the third protrusion 83 is set to an inclination angle along the shape of the outer end portion of the impeller 31, the size of the impeller 3 can be further increased. . As a result, the amount of air blown by the impeller 3 can be increased while suppressing the rotation speed of the impeller 3. *

As mentioned above, although exemplary embodiment of this invention was described, this invention is not limited to said embodiment. *

FIG. 7 is a longitudinal sectional view of an outdoor unit 1A according to a modification. The panel 4A of the outdoor unit 1A has an outer rectifying protrusion 72A that is a rectifying protrusion 70A. As shown in FIG. 7, the outer rectifying protrusion 72A is annularly arranged on the peripheral edge of the panel 4A. The outer rectifying protrusion 72A extends from the front surface of the panel 4A toward the front, which is the side opposite to the motor 2A. Thus, when the rectifying protrusion 70A is provided in front of the panel 4A, the airflow in front of the panel 4A is rectified. Thereby, the airflow inside the outdoor unit 1A can be efficiently sent to the outside. *

In particular, in the example of FIG. 7, the inner diameter of the inner peripheral surface of the outer rectifying protrusion 72A increases toward the front end of the outer rectifying protrusion 72A. In this way, the flow path resistance due to the outer rectifying protrusion 72A can be reduced. As a result, the amount of gas that passes through the panel 4A and is discharged to the outside of the outdoor unit 1A may be increased as compared with the case where the inner peripheral surface of the outer rectifying protrusion 72A extends parallel to the central axis. *

FIG. 8 is a longitudinal sectional view of an outdoor unit 1B according to another modification. The panel 4B of the outdoor unit 1B has an outer rectifying protrusion 72B that is a rectifying protrusion 70B. As shown in FIG. 8, the outer rectifying protrusion 72B is annularly disposed on the peripheral edge of the panel 4B. Further, the outer rectifying protrusion 72B extends from the front surface of the panel 4B toward the front side opposite to the motor 2B. Thus, when the rectifying protrusion 70B is provided in front of the panel 4B, the airflow in front of the panel 4B is rectified. Thereby, the airflow inside the outdoor unit 1B can be efficiently sent to the outside. *

In particular, in the example of FIG. 8, the inner diameter of the inner peripheral surface of the outer rectifying protrusion 72B decreases as it goes toward the front end of the outer rectifying protrusion 72B. If it does in this way, it can suppress more that a water drop and a foreign material approach into the inside of outdoor unit 1B by outside rectification projection 72B. *

In the above embodiment, the inner rectifying protrusion has the first protrusion, the second protrusion, and the third protrusion. However, the shape of the inner straightening protrusion is not limited to this. For example, the inner rectifying protrusion may have only a protrusion whose inner diameter increases from the rear surface of the panel toward the rear end of the inner rectifying protrusion. The inner rectifying protrusion may have only a protrusion whose inner diameter decreases from the rear surface of the panel toward the rear end of the inner rectifying protrusion. *

Moreover, in said embodiment, the panel and the baffle protrusion were formed with the single member. However, the panel and the rectifying protrusion may be separate members. *

In the above embodiment, the basic shape of the through hole is a polygon such as a quadrangle or a regular hexagon. However, the shape of the through hole may be a circle or an ellipse, or other shapes. *

Moreover, in said embodiment, the shape of the radial inner edge of the frame part of the panel was substantially circular seeing from the axial direction. However, the shape of the inner edge in the radial direction of the frame portion may be a polygon such as a regular hexagon, a regular octagon, or a regular dodecagon as viewed from the axial direction, or other shapes. *

Moreover, in said embodiment, the shape of the radial direction outer edge of the center part of the panel was substantially circular seeing from the axial direction. However, the shape of the radially outer edge of the central portion may be a polygon such as a regular hexagon, a regular octagon, or a regular dodecagon as viewed from the axial direction, or may be other shapes. *

In the motor of the above embodiment, the stationary stator is exposed, but the stator may be covered with a mold resin. In other words, the stationary part may have a mold resin that covers at least a part of the stator. If the stator is covered with the mold resin, the adhesion of water droplets to the stator can be further suppressed. Further, it is possible to prevent the stator from being vibrated slightly by a magnetic action when the motor is driven. Therefore, vibration and noise generated when the motor is driven can be further suppressed. *

The specific configuration for realizing each part of the outdoor unit and the fan unit may be different from the configuration shown in the above embodiment. Moreover, you may combine suitably each element which appeared in said embodiment and modification in the range which does not produce inconsistency.

The present invention can be used for a fan unit and an outdoor unit.

1, 1A, 1B

outdoor unit

2, 2A, 2B motor 3,

impeller

4, 4A, 4B panel 11, housing 12, fan unit 13, heat exchanger 14, power supply 15, lead wire 21, stationary part 22, rotating part 31, blade 41, central part 42 frame part 43 Ventilation part 44 Through hole 51 First fixing part 52 Second fixing part 53 Stator core 54 Coil 60 Rib 61 Disc part 62

Cylindrical part

70, 70A, 70B Rectifying protrusion 71

Inner rectifying protrusion

72A, 72B Outer rectifying protrusion 81 First protrusion 82 2nd projection 83 3rd projection 111 Exhaust port 112 Intake port 211 Base unit 212 Stator 213 Lead wire holding unit 221 Shaft 222 Rotor cup 223 Magnet

Claims

A fan unit used for an outdoor unit of an air conditioner,
A motor,
An impeller that rotates around a central axis extending forward and backward by the power of the motor;
A panel that is disposed in front of the impeller and has a plurality of through holes that allow airflow generated by rotation of the impeller to pass therethrough;
Have
The motor is
A stationary part having a stator;
A rotating part having a magnet located radially outside the stator;
Have
The stationary part is fixed to the panel;
A fan unit having a rectifying protrusion protruding in an axial direction on a peripheral edge of the panel.
The fan unit according to claim 1,
The rectifying protrusion is an annular fan unit.
The fan unit according to claim 2,
The rectifying protrusion is a fan unit having an annular shape coaxial with the central axis.
The fan unit according to any one of claims 1 to 3, wherein
The rectifying protrusion includes an inner rectifying protrusion that protrudes from a rear surface of the panel toward the motor side.
The fan unit according to claim 4,
A fan unit in which at least a part of the impeller and at least a part of the inner rectifying protrusion overlap in a radial direction.
The fan unit according to any one of claims 1 to 5, wherein
The rectifying protrusion includes an outer rectifying protrusion that protrudes from a front surface of the panel toward a side opposite to the motor side.
The fan unit according to any one of claims 1 to 6, wherein
A fan unit in which an inner diameter of an inner peripheral surface of the rectifying protrusion is increased toward an axial tip of the rectifying protrusion.
The fan unit according to any one of claims 1 to 6, wherein
A fan unit in which an inner diameter of an inner peripheral surface of the rectifying protrusion is reduced toward an axial tip of the rectifying protrusion.
The fan unit according to any one of claims 1 to 8,
The stationary part is a fan unit having a mold resin covering at least a part of the stator.
An outdoor unit of an air conditioner,
The fan unit according to any one of claims 1 to 9,
A heat exchanger,
Have
The impeller is disposed between the heat exchanger and the panel,
The outdoor unit in which the airflow is generated from the heat exchanger side toward the panel side.