Fan and indoor unit

Abstract

A fan (1) is provided with: a multi-blade impeller (8), and a mechanism that rotates the multi-blade impeller (8) about a rotation shaft (16). The multi-blade impeller (8) includes: a plurality of impellers (31) arranged in an axial direction (35) parallel to the rotation shaft (16), and a partition (42) disposed along a plane perpendicular to the rotation shaft (16). The partition (42) includes: a main body portion (44) that separates two of the plurality of impellers (31), and a peripheral portion (45) that surrounds a peripheral side of the main body portion (44). The peripheral portion (45) is formed so as to gradually thin as it approaches a peripheral edge (43) of the partition (42). The peripheral edge (43) is formed by a plurality of peripheral edge portions (49-1 to 49-4). A first peripheral edge portion (49-1) of the plurality of peripheral edge portions (49-1 to 49-4) is located at a different position in the axial direction (35) than a second peripheral edge portion (49-2) of the plurality of peripheral edge portions (49-1 to 49-4) that is different from the first peripheral edge portion (49-1).

Description

Technical Field

[0001] The technology disclosed herein relates to fans and indoor units. Background Technology

[0002] An indoor unit of an air conditioner equipped with a cross-flow fan is known. The cross-flow fan comprises: multiple impellers arranged axially, and multiple baffles separating the multiple impellers. Because the cross-section of the edges of its baffles is triangular, the fan can reduce turbulence or separation of air impacting the baffles, thereby increasing airflow and reducing noise (Patent Document 1).

[0003] Patent Document 1: Japanese Patent Application Publication No. 2001-173587 Summary of the Invention

[0004] The air supplied by the impeller is blown out in a direction orthogonal to the axial direction. Due to the influence of the boundary layer formed near the baffles, the width of the blown airflow is the width between adjacent baffles minus the thickness of the boundary layer. Because the width of this airflow narrows, the air volume of the fan decreases.

[0005] In view of the above-mentioned problems, the disclosed technology aims to provide a fan and indoor unit that can diffuse the blown air axially.

[0006] A wind turbine according to one embodiment of the present disclosure includes: a multi-bladed impeller; and a mechanism for rotating the multi-bladed impeller about a rotation axis. The multi-bladed impeller includes: a plurality of impellers arranged in an axial direction parallel to the rotation axis; and a baffle plate disposed along a plane perpendicular to the rotation axis. The baffle plate includes: a main body portion that separates two of the plurality of impellers; and an outer peripheral portion that surrounds the outer peripheral side of the main body portion in a plane perpendicular to the rotation axis. The outer peripheral portion is formed to gradually thin towards the outer peripheral edge of the baffle plate. The outer peripheral edge of the baffle plate is formed by a plurality of circumferentially continuous outer peripheral edge portions. A first outer peripheral edge portion of the plurality of outer peripheral edge portions is located at a first position in the axial direction, and a second outer peripheral edge portion of the plurality of outer peripheral edge portions, which is different from the first outer peripheral edge portion, is located at a second position in the axial direction.

[0007] The fan and indoor unit disclosed herein can suppress the reduction of air volume. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view showing an indoor unit equipped with the fan of the embodiment.

[0009] Figure 2 This is a perspective view of the fan in an embodiment.

[0010] Figure 3This is a plan view showing the partition.

[0011] Figure 4 It is a cross-sectional view showing the outer perimeter.

[0012] Figure 5 It is a cross-sectional view showing other peripheral parts that are different from the outer peripheral parts.

[0013] Figure 6 It is a graph showing the relationship between the air volume and input of the fan in the embodiment and the relationship between the air volume and input of the fan in the comparative example. Detailed Implementation

[0014] The fan and indoor unit according to the embodiments disclosed in this application will now be described with reference to the accompanying drawings. However, the technology disclosed herein is not limited to the following description. Furthermore, in the following description, the same structural elements are labeled with the same symbols, and repeated descriptions are omitted.

[0015] Example

[0016] like Figure 1 As shown, in this embodiment, the fan 1 is installed in the indoor unit 10 of the air conditioner. Figure 1 This is a cross-sectional view showing an indoor unit 10 equipped with a fan 1 according to an embodiment. The air conditioner includes an indoor unit 10 and an outdoor unit (not shown). The outdoor unit is located outdoors. The indoor unit 10 is installed on the wall of an air-conditioned room separated from the outdoors. The indoor unit 10 includes a fan 1, a housing 2, and a heat exchanger 3. A ventilation duct 5 is formed inside the housing 2. An air inlet 6 is formed at the top of the housing 2, which connects the ventilation duct 5 to the outside of the housing 2. The heat exchanger 3 is disposed in the ventilation duct 5. The fan 1 is disposed below the heat exchanger 3 in the ventilation duct 5. The fan 1 is driven to rotate by a mechanism described later, thereby generating an airflow passing through the heat exchanger 3. Furthermore, in the following description, Figure 1 The left side in the viewpoint is called the front side of housing 2, and the right side is called the back side of housing 2.

[0017] The fan 1 includes a fan housing 7 and a cross-flow impeller 8. The fan housing 7 is disposed inside the housing 2 or is integrally formed with the housing 2 and fixed to the housing 2. The fan housing 7 has an air supply duct 11 and an air outlet 12. The air supply duct 11 is formed inside the fan housing 7. One end of the air supply duct 11 communicates with the area between the fan 1 and the heat exchanger 3 in the ventilation duct 5. The air outlet 12 is disposed at the lower end of the fan housing 7. The other end of the air supply duct 11 communicates with the air outlet 12 and communicates with the outside of the housing 2 of the indoor unit 10 via the air outlet 12.

[0018] A cross-flow impeller 8 is disposed in the air supply duct 11. The fan housing 7 has a front side tongue 14 and a rear side tongue 15. The front side tongue 14 is disposed on the front side of the housing 2. The rear side tongue 15 is disposed on the rear side of the housing 2.

[0019] Figure 2 This is a perspective view of the fan 1 in the embodiment. The cross-flow impeller 8 is formed in a generally rod shape, extending along the width direction of the housing 2 ( Figure 1 The impeller (in the depth direction from the viewpoint) is positioned in the air supply duct 11 and supported on the fan housing 7 in a manner that allows it to rotate about the rotation axis 16. The cross-flow impeller 8 includes multiple impellers 31, multiple baffles 32, a first end plate 33, and a second end plate 34. The multiple impellers 31 are arranged in an axial direction 35 parallel to the rotation axis 16 and are fixed to each other via the multiple baffles 32. One of the multiple impellers 31, an impeller 36, has multiple blades 41. Each blade of the multiple blades 41 is as follows... Figure 1 As shown, its cross-section perpendicular to the axial direction 35 has a flat shape and a shape that gradually curves from the rotation axis 16 toward the outer circumferential direction toward the rotation direction 40. Multiple blades 41 are arranged in a circumferential direction centered on the rotation axis 16 and configured along the axial direction 35 parallel to the rotation axis 16. Other impellers among the multiple impellers 31, different from impeller 36, also have multiple blades 41, just like impeller 36.

[0020] The plurality of baffles 32 are all formed in a generally circular plate shape. The plurality of baffles 32 are all arranged perpendicular to the axial direction 35. Each of the plurality of baffles 32 is disposed between two impellers of the plurality of impellers 31 and is fixed to the plurality of blades 41 of the two impellers.

[0021] The first end plate 33 is formed in a generally circular plate shape. The first end plate 33 is disposed at one end of the cross-flow impeller 8 along a plane perpendicular to the axial direction 35, and is fixed to a plurality of blades 41 of the first impeller 37 disposed at one end of the plurality of impellers 31. The second end plate 34 is formed in a generally circular plate shape. The second end plate 34 is disposed at the other end of the cross-flow impeller 8 along a plane perpendicular to the axial direction 35, and is fixed to a plurality of blades 41 of the second impeller 38 disposed at the other end of the plurality of impellers 31.

[0022] The front tongue 14 is formed in the shape of a strip and is disposed on the front side of the air supply duct 11 along a straight line parallel to the axis 35 and along the outer peripheral surface of the cross-flow impeller 8. The rear tongue 15 is formed in the shape of a strip and is disposed on the rear side of the air supply duct 11 along the axis 35 and along the outer peripheral surface of the cross-flow impeller 8.

[0023] The fan 1 also includes a motor unit (not shown). The motor unit is used to power the cross-flow fan wheel 8 as... Figure 1 The mechanism shown rotates around the rotation axis 16 along a preset rotation direction 40.

[0024] One of the multiple partitions 32, such as partition 42 Figure 3 It is formed into a circular plate shape as shown. Figure 3This is a plan view showing the partition 42. The partition 42 is arranged such that its outer peripheral edge 43 is along a circle centered on the rotation axis 16. The partition 42 has a main body portion 44 and an outer peripheral portion 45. The main body portion 44 has a hole 46 formed therein. The hole 46 is formed at the center of the partition 42 such that its edge is along a circle centered on the rotation axis 16. The outer peripheral portion 45 is formed to surround the outer peripheral side of the main body portion 44 perpendicular to the rotation axis. The outer peripheral portion 45 has an outer peripheral edge 43.

[0025] The peripheral portion 45 is formed by a plurality of peripheral portions 48-1 to 48-4, and the plurality of peripheral portions 48-1 to 48-4 are formed by... Figure 3 The boundary is defined by a dashed line and is continuous in the circumferential direction. At this point, the outer perimeter 43 is formed by multiple outer perimeter portions 49-1 to 49-4, which are formed by... Figure 3 The boundary is defined by a dashed line and is continuous in the circumferential direction, corresponding to multiple outer peripheral portions 48-1 to 48-4. Among the multiple outer peripheral portions 49-1 to 49-4, outer peripheral portion 49-1 (the first outer peripheral portion) corresponding to outer peripheral portion 48-1 is formed in outer peripheral portion 48-1. Among the multiple outer peripheral portions 49-1 to 49-4, outer peripheral portion 49-2 (the second outer peripheral portion) corresponding to outer peripheral portion 48-2 is formed in outer peripheral portion 48-2. Among the multiple outer peripheral portions 49-1 to 49-4, outer peripheral portion 49-3 (the third outer peripheral portion) corresponding to outer peripheral portion 48-3 is formed in outer peripheral portion 48-3. Among the multiple outer peripheral portions 49-1 to 49-4, outer peripheral portion 49-4 (the fourth outer peripheral portion) corresponding to outer peripheral portion 48-4 is formed in outer peripheral portion 48-4.

[0026] At this point, the lengths of the multiple outer peripheral edge portions 49-1 to 49-4 are all different, and the angles of the multiple central angles θ1 to θ4 corresponding to the multiple outer peripheral edge portions 49-1 to 49-4 are also different. Specifically, the central angle θ1 (first central angle) corresponding to the outer peripheral edge portion 49-1 is the angle between two straight lines extending from the center point 50 towards both ends of the outer peripheral edge portion 49-1, where the center point 50 is the point where the plane along the rotation axis 16 intersects with that of the partition plate 42. The central angle θ2 (second central angle) corresponding to the outer peripheral edge portion 49-2 is the angle between two straight lines extending from the center point 50 towards both ends of the outer peripheral edge portion 49-2. The angle of central angle θ2 is different from the angle of central angle θ1. The central angle θ3 (third central angle) corresponding to the outer peripheral edge portion 49-3 is the angle between two straight lines extending from the center point 50 towards both ends of the outer peripheral edge portion 49-3. The angle of central angle θ3 is different from the angle of central angle θ1, and also different from the angle of central angle θ2. The central angle θ4 (fourth central angle) corresponding to the outer peripheral edge portion 49-4 is the angle between two straight lines extending from the center point 50 to both ends of the outer peripheral edge portion 49-4. The angle of central angle θ4 is different from the angle of central angle θ1, different from the angle of central angle θ2, and different from the angle of central angle θ3.

[0027] Figure 4 This is a cross-sectional view of the outer peripheral portion 48-1. The outer peripheral portion 48-1 is formed such that the outer peripheral edge portion 49-1 is tapered, that is, it is formed to gradually thin towards the outer peripheral edge portion 49-1. At this time, the thickness of a certain portion of the outer peripheral portion 48-1 is approximately proportional to the distance between that portion and the outer peripheral edge portion 49-1. Furthermore, the thickness of the end of the outer peripheral portion 48-1 connected to the main body portion 44 is the same as the thickness of the main body portion 44.

[0028] Figure 5 This is a cross-sectional view showing another peripheral portion 48-2, different from the outer peripheral portion 48-1. Similar to the outer peripheral portion 48-1, the outer peripheral portion 48-2 is formed with a tapered outer peripheral edge portion 49-2, that is, it is formed to gradually thin towards the outer peripheral edge portion 49-2. At this time, the thickness of a certain portion of the outer peripheral portion 48-2 is approximately proportional to the distance between that portion and the outer peripheral edge portion 49-2. Furthermore, the thickness of the end of the outer peripheral portion 48-2 connected to the main body portion 44 is the same as the thickness of the main body portion 44. The position of the outer peripheral edge portion 49-2 in the axial direction 35 (second position) differs from the position of the outer peripheral edge portion 49-1 in the axial direction 35 (first position).

[0029] Similar to the outer peripheral portion 48-1, the outer peripheral portion 48-3 is formed with a tapered outer peripheral edge portion 49-3. The position of the outer peripheral edge portion 49-3 in the axial direction 35 (third position) differs from the position of the outer peripheral edge portion 49-1 in the axial direction 35 (first position) and also differs from the position of the outer peripheral edge portion 49-2 in the axial direction 35 (second position). Similar to the outer peripheral portion 48-1, the outer peripheral portion 48-4 is formed with a tapered outer peripheral edge portion 49-4. The position of the outer peripheral edge portion 49-4 in the axial direction 35 (fourth position) differs from the position of the outer peripheral edge portion 49-1 in the axial direction 35 (first position), differs from the position of the outer peripheral edge portion 49-2 in the axial direction 35 (second position), and also differs from the position of the outer peripheral edge portion 49-3 in the axial direction 35 (third position).

[0030] Among the multiple partitions 32, other partitions different from partition 42 replace the outer peripheral portion of partition 42 with other outer peripheral edge portions, while the other portions are formed in the same manner as partition 42. The shape of the replaced outer peripheral portion is different from that of the outer peripheral portion of partition 42 in that the multiple central angles θ1 to θ4 in the outer peripheral portion are different from the multiple central angles θ1 to θ4 in partition 42. Thus, the multiple partitions 32 are different from each other in that the portions corresponding to their multiple central angles θ1 to θ4 are different.

[0031] The air conditioner circulates refrigerant between the indoor unit 10 and the outdoor unit. The outdoor unit allows the refrigerant to exchange heat with the outside air. The fan 1 causes the cross-flow fan 8 to rotate around the rotating shaft 16 in the rotation direction 40. Through the rotation of the cross-flow fan 8, the fan 1 supplies air from the air-conditioned room from the air inlet 6 of the indoor unit 10 to the ventilation duct 5. The heat exchanger 3 allows the air supplied from the air inlet 6 to the ventilation duct 5 to exchange heat with the refrigerant, thereby regulating the temperature of the air supplied to the ventilation duct 5. Further, through the rotation of the cross-flow fan 8, the fan 1 blows the air, whose temperature has been regulated by the heat exchanger 3, out of the air outlet 12 into the air-conditioned room. Through the above operation, the air conditioner can cool or heat the air-conditioned room.

[0032] When the air, whose temperature has been regulated by the heat exchanger 3, flows in the air supply duct 11, a portion of the air flowing in the air supply duct 11 collides with the outer peripheral edge 43 of each of the plurality of baffles 32. Because the outer peripheral edge 43 of the fan 1 is pointed, the collisions of the air at the outer peripheral edge portions 49-1 to 49-4 are mitigated, reducing turbulence or separation of the air flowing in the air supply duct 11 caused by air collisions, and reducing pressure loss when the air flows in the air supply duct 11. Since the pressure loss is reduced, the fan 1 can reduce the electricity consumed by the motor unit (not shown) when rotating the cross-flow impeller 8. Furthermore, a boundary layer with a slower wind speed than the mainstream is formed near the surface of the plurality of baffles 32 of the fan 1, but by making the outer peripheral edges 43 of the plurality of baffles 32 positioned differently in the axial direction 35, the width of the mainstream flowing between the circumferentially arranged blades 41 can be increased. The indoor unit 10 reduces the pressure loss of the air flowing through the fan 1 by widening the width of the axial direction 35 of the main flow between adjacent partitions 32. Furthermore, the fan 1 reduces the sound pressure energy of noise by making the lengths of the multiple outer peripheral edge portions 49-1 to 49-4 different from each other.

[0033] Comparative fan

[0034] The comparative fan replaces the plurality of baffles 32 of the fan 1 in the above embodiment with other plurality of baffles, while the other parts are the same as the fan 1 in the above embodiment. The thickness of the outer peripheral portion of the replaced plurality of baffles is fixed and equal to the thickness of the main body portion 44. That is, the outer peripheral edges of the plurality of baffles are not tapered, and the outer peripheral edges are formed with end faces along a cylindrical surface with the rotation axis 16 as the central axis.

[0035] Figure 6 This is a graph showing the relationship between the air volume and input of the fan 1 in the embodiment, and the relationship between the air volume and input of the fan in the comparative example. Air volume represents the amount of air blown out of the outlet 12 by the fan 1 or the comparative fan per unit time. Input represents the electrical power consumed by the fan 1 or the comparative fan to rotate the cross-flow impeller when air is blown out of the outlet 12. Curve 61 indicates that the greater the air volume of the fan 1, the greater the input of the fan 1. Curve 62 indicates that the greater the air volume of the comparative fan, the greater the input of the comparative fan. Curves 61 and 62 indicate that when the air volume of the fan 1 is equal to that of the comparative fan, the input of the fan 1 is less than that of the comparative fan. That is, curves 61 and 62 indicate that the fan 1 can reduce the input. Curves 61 and 62 also indicate that the fan 1 reduces the pressure loss of the air flowing through the cross-flow impeller 8.

[0036] Effect of fan 1 in the embodiment

[0037] The fan 1 of this embodiment includes a cross-flow impeller 8 and a motor unit for rotating the cross-flow impeller 8 about a rotation axis 16. The cross-flow impeller 8 includes a plurality of impellers 31 arranged along an axis 35 parallel to the rotation axis 16 and a baffle 42 arranged along a plane perpendicular to the axis 35. The baffle 42 includes a main body portion 44 that separates two of the plurality of impellers 31 and an outer peripheral portion 45 that surrounds the outer peripheral side of the main body portion 44 perpendicular to the rotation axis. The outer peripheral portion 45 is formed to gradually thin as it approaches the outer peripheral edge 43 of the baffle 42, that is, the outer peripheral edge 43 is tapered. The outer peripheral edge 43 of the baffle 42 is formed by a plurality of outer peripheral edge portions 49-1 to 49-4 that are continuous in the circumferential direction. The position of the outer peripheral edge portion 49-1 in the axial direction 35 is different from the position of the outer peripheral edge portion 49-2 in the axial direction 35, which is different from the outer peripheral edge portion 49-1 in the axial direction 35.

[0038] At this time, the fan 1 of the embodiment, due to the tapered outer peripheral edge 43 of its baffle 42, can reduce pressure loss when air is supplied and can reduce the input volume. Furthermore, because the fan 1 of the embodiment has multiple outer peripheral edge portions 49-1 to 49-4 positioned differently along the axial direction 35, the width of the main flow along the axial direction 35 between adjacent baffles 32 can be widened. The indoor unit 10 equipped with the fan 1 of the embodiment can disperse the blown air along the axial direction 35, thereby blowing temperature-regulated air at a wide angle towards the air-conditioned room, thus appropriately cooling or heating the air-conditioned room.

[0039] Furthermore, the angle θ1 of the central angle corresponding to the outer peripheral edge portion 49-1 of the fan 1 in this embodiment is different from the angle θ2 of the central angle corresponding to the outer peripheral edge portion 49-2. The central angle θ1 is the angle between two straight lines extending from the center point 50 toward both ends of the outer peripheral edge portion 49-1, where the center point 50 is the point where the plane along which the rotation axis 16 and the partition 42 intersect intersect. The central angle θ2 is the angle between two line segments extending from the center point 50 toward both ends of the outer peripheral edge portion 49-2. In this case, because the circumferential lengths of each of the plurality of outer peripheral edge portions 49-1 to 49-4 are different from each other, the fan 1 in this embodiment can widen the width of the axial direction 35 of the main flow between adjacent partitions in the plurality of partitions 32.

[0040] Furthermore, the cross-flow impeller 8 of the fan 1 in this embodiment also includes other baffles arranged along other planes parallel to the plane along which the baffle 42 is located. Like the baffle 42, this baffle has a tapered outer peripheral edge 43, i.e., it is formed to gradually thin towards the outer peripheral edge 43. Similar to the outer peripheral edge 43 of the baffle 42, the outer peripheral edge of this baffle is formed by a plurality of outer peripheral edge portions located at different points along the axial direction 35. In this case, compared to a fan that only has one baffle with a plurality of outer peripheral edge portions 49-1 to 49-4, the fan 1 of this embodiment can further reduce the pressure loss of the supplied air.

[0041] Furthermore, in the embodiment, the plurality of baffles 32 of the fan 1 are formed in a manner where each baffle has a different central angle θ1 to θ4, resulting in different shapes. Consequently, the positions of the plurality of outer peripheral edge portions 49-1 to 49-4 along the axial direction 35 are inconsistent on each of the plurality of baffles 32. Therefore, compared to other fans where the positions of the plurality of outer peripheral edge portions 49-1 to 49-4 are consistent along the axial direction 35, the fan 1 of the embodiment can widen the width of the main flow along the axial direction 35 between adjacent baffles 32.

[0042] On the other hand, in the fan 1 of the above embodiment, the multiple center angles θ1 to θ4 are different among the multiple partitions 32, but the multiple partitions 32 may also have the same shape. When the multiple partitions 32 have the same shape, the fan, like the fan 1 of the above embodiment, can reduce the pressure loss of the blown air.

[0043] On the other hand, in the fan 1 of the above embodiment, multiple baffles 32 are formed in such a way that multiple central angles θ1 to θ4 are different, but multiple baffles 32 can also be formed in such a way that multiple central angles θ1 to θ4 are equal. When multiple central angles θ1 to θ4 are equal, the fan can also reduce the pressure loss of the ventilated air, just like the fan 1 of the above embodiment.

[0044] On the other hand, in the above embodiment, all the outer peripheral edges 43 of the plurality of baffles 32 of the fan 1 are tapered, but it is also possible to include baffles 42 whose outer peripheral edges 43 are not tapered among the plurality of baffles. Even if the fan partially includes baffles whose outer peripheral edges 43 are not tapered, it is still able to reduce the pressure loss of the blown air, just like the fan 1 of the above embodiment.

[0045] On the other hand, in the fan 1 of the above embodiment, multiple baffles 32 are provided in the cross-flow impeller 8, which draws in air from the radial direction and blows air out from other radial directions, but they can also be provided in a multi-bladed impeller different from the cross-flow impeller. As an example of the cross-flow impeller 8, a centrifugal impeller that draws in air from the axial direction and blows air out from the radial direction can be shown. This type of fan, like the fan 1 of the above embodiment, is able to reduce the pressure loss of the delivered air.

[0046] Furthermore, while the fan 1 in the above embodiment is used in the indoor unit 10 of an air conditioner, it can also be used in other devices different from the indoor unit 10. An example of such a device is an air curtain device.

[0047] The embodiments described above are examples, but the embodiments are not limited to the above content. Furthermore, the structural elements described above include structural elements that are readily conceived by those skilled in the art, substantially the same, and within the so-called equivalent range. Moreover, the structural elements described above can be appropriately combined. Furthermore, at least one of various omissions, substitutions, and modifications can be made to the structural elements without departing from the spirit of the embodiments.

[0048] Symbol Explanation

[0049] 1: Fan

[0050] 2: Shell

[0051] 3: Heat exchanger

[0052] 5: Ventilation duct

[0053] 6: Air Inlet

[0054] 7: Fan casing

[0055] 8: Crossflow wind turbine

[0056] 10: Indoor unit

[0057] 11: Air supply duct

[0058] 12: Air vent

[0059] 14: Front side of the tongue

[0060] 15: Dorsal tongue

[0061] 16: Rotation axis

[0062] 31: Multiple impellers

[0063] 32: Multiple partitions

[0064] 33: First end plate

[0065] 34: Second end plate

[0066] 35: Axial

[0067] 36: Impeller

[0068] 42: partition

[0069] 43: Outer edge

[0070] 44: Main Body

[0071] 45: Peripheral part

[0072] 48-1~48-4: Multiple peripheral parts

[0073] 49-1~49-4: Multiple peripheral edge portions

[0074] 50: Center point.

Claims

1. A fan, characterized in that, have: Multi-bladed wind turbine; as well as A mechanism that causes the multi-bladed wind turbine to rotate around a central axis. The multi-bladed wind turbine includes: Multiple impellers are arranged axially parallel to the axis of rotation; and A partition, which is arranged along a plane perpendicular to the axis of rotation. The partition includes: The main body, which separates two of the plurality of impellers; and The outer peripheral portion surrounds the outer peripheral side of the main body portion perpendicular to the axis of rotation. The outer peripheral portion is tapered in shape, gradually thinning towards the outer peripheral edge of the partition. The outer peripheral edge of the partition is formed by a plurality of continuous outer peripheral edge portions in the circumferential direction. The first outer peripheral edge portion of the plurality of outer peripheral edge portions is located at a first position in the axial direction, and the second outer peripheral edge portion of the plurality of outer peripheral edge portions, which is different from the first outer peripheral edge portion, is located at a second position in the axial direction.

2. The fan according to claim 1, characterized in that, The angle of the first central angle between two straight lines extending from the center point where the rotation axis intersects the plane toward the two ends of the first outer peripheral edge portion is different from the angle of the second central angle between two line segments extending from the center point toward the two ends of the second outer peripheral edge portion.

3. The fan according to claim 1, characterized in that, The multi-bladed wind turbine also includes other baffles arranged along other planes parallel to the plane. The other partitions include: Other main components, which separate two impellers that are different from the two impellers among the plurality of impellers; and The other peripheral portions surround the outer peripheral sides of the other main body portions that are perpendicular to the axis of rotation. The other peripheral portions are tapered in shape, gradually thinning as they approach the outer peripheral edges of the other partitions. The outer peripheral edges of the other partitions are formed by a plurality of other outer peripheral edge portions that are continuous in the circumferential direction. The third outer peripheral edge portion of the other plurality of outer peripheral edge portions is located at a third position in the axial direction, which is different from the fourth outer peripheral edge portion of the other plurality of outer peripheral edge portions located at a fourth position in the axial direction.

4. The fan according to claim 3, characterized in that, The shape of the other peripheral portions is different from the shape of the peripheral portions.

5. An indoor unit, characterized in that, have: Heat exchangers; and The fan of claim 1 is used to generate an airflow through the heat exchanger.

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