Blower and mist generating device using same

Abstract

To provide a mist generating device using a magnet coupling type drive device reducing vibrations or noise of a rotary shaft.SOLUTION: One end on a partition wall 2a side of a rotary shaft 13 has a projection, and the partition wall 2a opposing to the projection has a curved recess abutting on the projection. Therefore, even if rotation centers of a motor shaft 32 and the rotary shaft 13 are deviated, when rotated by magnet-coupling, the rotary shaft 13 is moved to the lowermost part of the recess by attraction force of magnetism to match the rotation center with that of the motor shaft 32, so that the deviation of the rotation center axis is suppressed to stable rotations, and vibrations or noise due to axial deviation can be reduced.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a magnetic coupling type drive device that transmits the power of a motor on the drive side to a rotating body on the driven side in a non-contact manner via magnetic coupling, a blower that uses the drive device to rotate a blower fan to blow air, and a mist generator that uses the drive device to rotate a rotating body and releases nano-mist and negative ions into a room to humidify and purify the air. [Background technology]

[0002] Conventionally, this type of mist generator includes a blower unit case with an air intake and an outlet, a water storage section (water storage chamber) that stores water inside the blower unit case, a disk (rotating body) with many blades on its outer periphery, a blower fan that sends the air sucked in from the intake to the outlet, and a motor that rotates the disk and the blower fan, generating mist by stirring up the water in the water storage section with the blades of the disk (rotating body), and blowing air containing the generated mist from the outlet (for example, Patent Document 1).

[0003] Also, while in this conventional mist generator the motor's rotating shaft is directly supported by a disk, it is also possible to configure the rotation drive mechanism using a magnetic coupling, although this is not described in this conventional Patent Document 1. In that case, the configuration will be as shown in Figure 9, and since the motor 131 and the rotor 106 can be arranged separately, it is possible to prevent water in the water storage chamber 105 from entering the motor shaft 132 and causing the motor 131 to break down. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-122609 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in this conventional technology, when magnetic coupling is performed between the motor side magnet 134 and the rotor side magnet 114, if the centers of rotation of the motor shaft 132 and the rotor shaft 113 do not coincide, there is a risk of axial misalignment or vibration, which can result in noise. [Means for solving the problem]

[0006] In order to solve the above problem, the present invention provides the following: Air circulation The device includes a motor, a motor shaft which is an output shaft of the motor, a motor-side magnet which is connected to one end of the motor shaft and is rotated by the motor, a rotor-side magnet which is disposed opposite the motor-side magnet via a partition wall and which rotates with the rotation of the motor-side magnet by being magnetically coupled with the motor-side magnet, a rotor which is rotated by the rotation of the rotor-side magnet, and a rotating shaft which is fixed to the rotor and serves as the center of rotation of the rotor, and one end of the rotating shaft on the partition wall side has a protrusion, and the partition wall facing the protrusion has a curved protrusion which abuts against the protrusion. Bulkhead side With a dent a magnetic coupling type drive unit having a casing facing the other end of the rotating shaft and a cylindrical casing-side recess for supporting the other end of the rotating shaft in the casing; a blower unit case having the partition wall formed on the side and an air inlet and outlet at the top; and a centrifugal blower fan formed integrally with the rotating body and adapted to blow air sucked in through the inlet and send it out through the outlet, the interior of the blower unit case containing the rotating body, the rotating shaft, the rotating The blower unit is constituted by a rotor assembly constituted by a rolling body magnet and the blower fan, and the casing, the casing is configured to surround the outer periphery of the rotor and the blower fan, the distance that the other end of the rotating shaft moves in the axial direction from the state where it is inserted to the deepest part of the casing side recess until the protrusion abuts against the partition wall is greater than the depth of the partition wall side recess, and after the rotor assembly is assembled to the casing, the rotor assembly and the casing are configured to be assembled from the upper part of the blower unit case. It is characterized by the following.

[0007] Also, claim 2 Air circulation In the device, a motor; a motor shaft which is an output shaft of the motor; a motor-side magnet connected to one end of the motor shaft and rotated by the motor; a rotor-side magnet arranged opposite the motor-side magnet via a partition wall and rotating with the rotation of the motor-side magnet by being magnetically coupled with the motor-side magnet; a rotor which is rotationally driven by the rotation of the rotor-side magnet; and a rotating shaft which is fixed to the rotor and serves as a rotation center of the rotor, the rotating shaft having a protrusion at one end on the partition wall side, the partition wall facing the protrusion having a curved partition wall-side recess which abuts against the protrusion, a casing provided at a position opposite the other end of the rotating shaft, the casing having a support on which the other end of the rotating shaft is placed from above and supported; a blower unit case formed on a surface of the rotor and having an air inlet and an air outlet at an upper portion, and a centrifugal blower fan formed integrally with the rotor and blowing the air sucked in from the inlet and discharging it from the air outlet, wherein the interior of the blower unit case is composed of a rotor assembly composed of the rotor, the rotating shaft, the rotor-side magnet, and the blower fan, and the casing, the casing is configured to surround an outer periphery of the rotor and the blower fan, the distance that the other end of the rotating shaft moves in the axial direction from a state in which it abuts on the innermost part of the pedestal in the axial direction until the protrusion abuts on the partition is greater than the depth of the partition-side recess, and the rotor assembly and the casing are configured to be able to be assembled from the upper portion of the blower unit case after the rotor assembly is assembled to the casing. It is characterized by the following.

[0008] Also, claim 3 Mist generation using a blower In the device, The blower unit case includes a water storage section that maintains a predetermined water level, the rotor rotates while part of its outer periphery is in contact with the water surface in the water storage section, and has numerous blades at its outer periphery tip. The blades splash up water to generate humidified air containing mist, and the blower fan sends out the humidified air generated by the rotor from the air outlet. It is characterized by the following. Effect of the Invention

[0011] According to this invention, one end of the rotating shaft facing the partition has a protrusion, and the partition facing the protrusion has a curved recess that abuts the protrusion. Therefore, even if the rotation centers of the motor shaft and the rotating shaft are misaligned, when the rotating shaft rotates through magnetic coupling, the rotating shaft moves to the bottom of the recess due to the magnetic attraction force, and the motor shaft and the rotation center coincide, thereby suppressing misalignment of the central axis of rotation, stabilizing rotation, and reducing vibration and noise caused by axis misalignment.

[0012] Furthermore, in the magnetic coupling type drive device, a casing is provided at a position opposite the other end of the rotating shaft, and the casing has a cylindrical recess that supports the other end of the rotating shaft. Therefore, when the rotating body and the rotating shaft are assembled to the casing, the cylindrical recess in the casing acts as a receiver and fits into the casing, preventing the rotating body and the rotating shaft from falling off before rotation by the magnetic coupling occurs.

[0013] Furthermore, in the magnetic coupling type drive device, a casing is provided at a position opposite the other end of the rotating shaft, and the casing has a support base that supports the other end of the rotating shaft. Therefore, when assembling the rotating body and rotating shaft to the casing, the rotating body and rotating shaft can be placed on the support base provided on the casing, which makes it easier to assemble the rotating body and rotating shaft to the casing and also prevents the rotating body and rotating shaft from falling off before rotation by the magnetic coupling occurs.

[0014] Furthermore, in the magnetic coupling type drive device, a partition is formed on the side, a rotor and a rotor-side magnet are installed inside, and the device is equipped with a blower unit case having an air inlet and an outlet, and a centrifugal blower fan is formed integrally with the rotor and blows air sucked in from the inlet and sends it out from the outlet, thereby making it possible to provide a blower device that reduces vibration and noise caused by axial misalignment of the rotating shaft.

[0015] Furthermore, the magnetic coupling type drive unit is provided with an air blower unit case, a water storage section which maintains a predetermined water level within the air blower unit case, and a centrifugal air blower fan, and the rotor has numerous blades at the outer circumferential tip which splash water with the blades to generate humidified air containing mist, and the air blower fan blows out the generated humidified air from an outlet, thereby providing a mist generating device which reduces vibration and noise caused by misalignment of the rotating shaft. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of a mist generating device using a magnetic coupling type driving device according to an embodiment of the present invention; [Diagram 2] FIG. 13 is a cross-sectional view of the left side of the mist generating device using a magnetic coupling type drive device passing through a rotation shaft in the embodiment; [Diagram 3] FIG. 4 is a front view showing a cross section of the inside of the blower unit case in the embodiment; [Figure 4] 5A to 5C are cross-sectional views illustrating a procedure for assembling the rotor, the rotating shaft, the casing, and the blower unit case in the embodiment; [Diagram 5] FIG. 2 is an enlarged view of the periphery of a rotating shaft of the magnetic coupling type driving device according to the embodiment; [Figure 6] FIG. 13 is an enlarged view of the periphery of a rotating shaft of a magnetic coupling type driving device according to another embodiment; [Figure 7] FIG. 13 is an enlarged view of the periphery of a rotating shaft of a magnetic coupling type driving device according to another embodiment; [Figure 8] FIG. 13 is an enlarged view of the periphery of a rotating shaft of a magnetic coupling type driving device according to another embodiment; [Figure 9] FIG. 1 is a cross-sectional view illustrating a conventional example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Next, a mist generating device using a magnetic coupling type driving device according to an embodiment of the present invention will be described with reference to the drawings.

[0018] In the following description, "front (front face)", "rear (rear face)", "upper", "lower", "right" and "left" follow the definitions in Figures 1 to 9. The up-down direction corresponds to the vertical direction when the mist generator 1 using the magnetic coupling drive device is installed. The front-rear direction and the left-right direction correspond to the horizontal direction when the mist generator 1 using the magnetic coupling drive device is installed.

[0019] Please refer to Figures 1 to 3. Reference numeral 1 denotes a mist generator using a magnetic coupling type drive unit, which can be incorporated into a home air conditioner or heater, or used independently. Reference numeral 2 denotes a blower unit case, which is integrally formed with a bottom, back, left and right sides, and a front, and has an air inlet 3 at the top, and an outlet 4 that blows out humidified air containing mist.

[0020] Within the blower unit case 2, there are arranged a water storage section 5 that maintains a predetermined water level, a rotor 6 that rotates while part of its outer periphery is in contact with the water surface in the water storage section 5, a blower fan 7 that blows the sucked air to the outlet 4, a rotor casing 8 that is installed so as to surround the outer periphery of the rotor 6, a fan casing 9 that is installed so as to surround the outer periphery of the blower fan 7 and forms a spiral air passage leading to the outlet 4, and an outlet casing 10 that forms an air passage from the outlet of the spiral air passage of the fan casing 9 to the outlet 4. In addition, the fan casing 9 has a circular opening at approximately the center when viewed from the front, and has an intake hole 12 that guides the air that has passed through the intake port 3 to the blower fan 7.

[0021] The rotor 6 is located behind the blower fan 7, and is equipped with numerous blades 11 at the tip of its outer periphery. When the rotor 6 rotates, the blades 11 come into contact with the water surface in the water storage section 5, stirring up the water and scattering it around, and the stirred-up water collides with the rotor casing 8, generating mist. The blades 11 are formed perpendicular to the direction of rotation of the rotor 6.

[0022] The blower fan 7 is a centrifugal fan such as a sirocco fan that draws in air through suction holes 12 formed in the fan casing 9 and blows it out centrifugally from the outer periphery of the blower fan 7. The blown air becomes humidified air containing mist generated by the rotor 6, flows through the spiral air passage in the fan casing 9 in the direction of rotation shown in Figure 3, flows through the outlet casing 10, and is then sent out through the outlet 4.

[0023] Reference numeral 13 denotes a rotation shaft that serves as the center of rotation of the rotor 6 and the blower fan 7 and supports the rotor 6 and the blower fan 7.

[0024] Reference numeral 30 denotes a box-shaped motor case that houses a motor 31. Inside the motor case 30, there are arranged a motor shaft 32 that is the output shaft of the motor 31 and has one end supported by the motor 31, a magnet support 33 installed on the other end of the motor shaft 32, and a motor-side magnet 34 supported and fixed by the magnet support 33.

[0025] Reference numeral 14 denotes a rotor-side magnet that is disposed facing the motor-side magnet 34 via partitions 2a and 30a. The rotor-side magnet 14 is supported and fixed by the rotor 6. Partition 2a forms the rear side surface of the blower unit case 2, and partition 30a forms the front side surface of the motor case 30. The motor-side magnet 34 and rotor-side magnet 14 are circular and flat.

[0026] Here, the rotor-side magnet 14 receives the magnetic force of the motor-side magnet 34, thereby forming a magnetic coupling that enables the rotor 6 to rotate. In other words, when an operation start command is issued from an operation unit (not shown), the magnetic coupling type drive device drives the motor 31 at a predetermined rotation speed, and when the motor-side magnet 34 rotates via the motor shaft 32, the rotor-side magnet 14 rotates due to the magnetic coupling, so that the rotor 6 rotates at the same predetermined rotation speed as the motor 31. In forming the magnetic coupling type drive device, it is sufficient that either one of the partitions 2a or 30a is provided, and it is not necessary that the partitions 2a and 30a are provided as part of the blower unit case 2 or the motor case 30. Also, as long as the motor shaft 32 and the motor-side magnet 34 are configured to be integrated, the magnet support 33 is not required.

[0027] The rotor casing 8 and the fan casing 9 have different outer diameters, and are integrally formed with a connecting plate 15. The air outlet casing 10 is also integrally formed with the rotor casing 8 and the fan casing 9.

[0028] A water inlet hole 16 is provided at the bottom of the rotor casing 8 to introduce water from the water storage section 5 into the rotor casing 8. A water drain hole 17 is provided at the bottom of the fan casing 9 to drain water that has entered the fan casing into the water storage section 5.

[0029] The water storage section 5 has a water supply port 18 on its side, to which a water supply pipe 19 is connected. A water supply means (not shown) such as a cartridge tank is provided at the end of the water supply pipe 19, and the water level in the water storage section 5 is maintained.

[0030] As a configuration of the magnetic coupling type drive device, a partition-side protrusion 20 is formed on the rear side (partition-side) of the rotating shaft 13, and a partition-side recess 21 is provided in the partition 2a to face and abut against the partition-side protrusion 20. A casing-side protrusion 22 is formed on the front side (casing side) of the rotating shaft 13, and a cylindrical casing-side recess 23 that supports the casing-side protrusion 22 is provided in the fan casing 9.

[0031] Here, the effects and advantages of having the partition-wall-side projection 20 and the partition-wall-side recess 21 provided in the partition 2a in the magnetic coupling type drive device will be described with reference to FIGS.

[0032] Please refer to Figure 4. The inside of the blower unit case 2 of the magnetic coupling type drive device is constructed by assembling the rotor assembly of Figure 4(a) and the casing assembly of Figure 4(b) into the blower unit case 2.

[0033] The rotor assembly in Fig. 4(a) is made up of a rotor 6, a rotating shaft 13, a rotor-side magnet 14, and a blower fan 7, and is a part that rotates by magnetic coupling. Here, the blower fan 7 is not an essential component for a magnetic coupling type drive device. The casing assembly in Fig. 4(b) is made up of a rotor casing 8, a fan casing 9, and an air outlet casing 10, and is a casing that supports the rotating part in Fig. 4(a).

[0034] When assembling the rotor assembly of Figure 4(a) to the casing assembly of (b), the casing side protrusion 22 is inserted into the cylindrical casing side recess 23, but to enable smooth insertion, the inner diameter dimension of the casing side recess 23 is made larger than the outer diameter of the casing side protrusion 22.

[0035] The rotor assembly in FIG. 4(a) is assembled to the casing assembly in FIG. 4(b), and then assembled to the blower unit case 2, completing the blower unit case of the magnetic coupling type drive device.

[0036] Fig. 5(a) is an enlarged view of the periphery of the rotating shaft 13 in the magnetic coupling type driving device assembled in Fig. 4. The deepest and lowest part of the partition-side recess 21 provided in the partition 2a is disposed so as to coincide with the center of rotation of the motor shaft 32.

[0037] On the other hand, the center of rotation of the rotating shaft 13 may be misaligned with the center of rotation of the motor shaft 32 after assembly because the inner diameter dimension of the casing-side recess 23 is larger than the casing-side protrusion 22. If the rotor 6 is to rotate by the magnetic coupling in a state where the center of rotation is misaligned, there is a risk of vibration and noise being generated due to the misalignment of the central axis of rotation (axis misalignment). There is also a risk of the rotation speed being misaligned with that of the motor 31.

[0038] 5(b), however, as the rotating shaft 13 rotates, the motor-side magnet 34 and the rotor-side magnet 14 attract each other through magnetic coupling, causing the partition-side protrusion 20 of the rotating shaft 13 to move while rotating to the bottommost part of the partition-side recess 21. As a result, the center of rotation of the rotating shaft 13 coincides with the bottommost part of the partition-side recess 21, i.e., the center of rotation of the motor shaft 32, eliminating axial misalignment and preventing the generation of vibration and noise.

[0039] In Fig. 5(a), the partition wall-side projection 20 of the rotating shaft 13 is positioned away from the partition wall-side recess 21, but it may come into contact with the partition wall-side recess 21 due to the mutual magnetic attraction between the motor-side magnet 34 and the rotor-side magnet 14. Even in this case, as described above, during magnetic coupling, the rotating shaft 13 rotates so as to coincide with the bottom of the partition wall-side recess 21, i.e., the center of rotation of the motor shaft 32, and therefore the same effect can be obtained.

[0040] Next, the effects of the magnetic coupling drive device provided with the casing side projection 22 and the casing side recess 23 provided in the fan casing 9 will be described with reference to FIGS.

[0041] 4(a) is attached to the casing assembly in (b) without the casing side recess 23, and then assembled into the blower unit case 2, the rotating shaft 13 and the rotating body 6 will fall downwards due to their own weight, and the center of rotation of the rotating shaft 13 will be significantly shifted from the center of rotation of the motor shaft 32. If magnetic coupling is performed with the center of rotation shifted in this state and the rotating body 6 tries to rotate, there is a risk of vibration and noise due to the axis misalignment as described above, and of the rotation speed becoming different from that of the motor 31.

[0042] 5(a) and (b), the casing side recess 23 supports the casing side protrusion 22, thereby preventing the rotor 6 and the rotating shaft 13 from falling under their own weight and from being positioned significantly offset from the center of rotation of the motor shaft 32. This makes it possible to prevent the generation of vibrations and noise due to shaft misalignment.

[0043] As shown in FIG. 5(b), the rotating shaft 13 moves rearward (toward the partition wall) and rotates due to the magnetic coupling, while the frontward (casing) side moves in a direction (rearward) in which the casing-side projection 22 moves away from the casing-side recess 23. In this state, the length of the rotating shaft 13 is set so that a portion W where the inner wall of the casing-side recess 23 and the outer periphery of the casing-side projection 22 overlap in the axial direction is generated. Furthermore, it is preferable that the length of this overlapping portion W is as small as possible. This allows the rotating shaft 13 to be supported without the casing-side projection 22 falling off the casing-side recess 23 when the rotor 6 and the rotating shaft 13 are assembled as shown in FIG. 5(a). Furthermore, as shown in FIG. 5(b), when the rotating shaft 13 rotates due to the magnetic coupling, only the portion W where the casing-side projection 22 overlaps with the inner wall of the casing-side recess 23 comes into contact with the rotating shaft 13, but this contact area can be made as small as possible, thereby reducing the frictional force acting during rotation and reducing the sliding noise caused by friction.

[0044] Next, another embodiment of the partition-side recess 21 will be described with reference to FIG.

[0045] 6 has an overall spherical shape. Even in this shape, the bottom of the partition-side recess 21 is disposed so as to coincide with the center of rotation of the motor shaft 32. Therefore, even if the rotating shaft 13 is assembled with its center of rotation misaligned, the magnetic coupling ensures that the center of rotation of the rotating shaft 13 coincides with the bottom of the partition-side recess 21, i.e., the center of rotation of the motor shaft 32, preventing vibration and noise caused by shaft rub.

[0046] Next, another embodiment of the casing side recess 23 will be described with reference to FIG.

[0047] 7, the shape of the casing side recess 23 is such that the inner diameter of the cylinder is sufficiently larger than the outer diameters of the casing side projection 22 and the rotating shaft 13. Here, the length of the rotating shaft 13 is set to a length that prevents the rotating shaft 13 from falling out of the casing side recess 23 during assembly as shown in FIG.

[0048] When the rotor 6 and the rotating shaft 13 rotate due to the magnetic coupling, the rotating shaft 13 does not come into contact with the inner wall of the casing-side recess 23, as shown in Fig. 7(b), and can rotate stably due to the attractive force of the magnetic force. This is achieved because the partition-side protrusion 20 fits into the bottommost part of the partition-side recess 21, allowing for stable rotation, and because the rotation centers of the rotating shaft 13 and the motor shaft 32 are aligned, allowing for stable rotation without the occurrence of shaft misalignment or shaft vibration.

[0049] Furthermore, since the inner diameter of the casing side recess 23 is large, it becomes easy to insert the casing side projection 22, and the rotor 6 and the rotating shaft 13 can be easily assembled.

[0050] Next, another embodiment of the casing side recess 23 will be described with reference to FIG.

[0051] Reference numeral 24 denotes a casing-side receiving base that is shaped like a bowl by removing the upper half of the casing-side recess 23 in Fig. 7. This makes it easier to insert the casing-side protrusion 22 into the casing-side receiving base 24 than with the shape of the casing-side recess 23 in Fig. 7, and allows the rotor 6 and the rotating shaft 13 to be assembled more easily.

[0052] During assembly as shown in Figure 8(a), most of the rotating shaft 13 is contained within the recess at the bottom of the casing side receiving base 24 as shown in the CC cross-sectional view, making it difficult for the rotating shaft 13 to fall off from the left or right side of the casing side receiving base 24.

[0053] Next, the effects obtained by using a magnetic coupling type drive device in the blower will be described.

[0054] The blower device is configured to include a blower unit case 2 having an air inlet 3 and an outlet 4, a rotor side magnet 14 in the blower unit case 2, a rotor 6, and a centrifugal blower fan 7 formed integrally with the rotor 6, which blows air sucked in from the inlet 3 and sends it out from the outlet 4 to the outside.

[0055] By using the aforementioned magnetic coupling type drive device for this blower, the centers of rotation of the motor shaft 32 on the motor 31 side and the rotating shaft 13 on the rotating body 6 side can be aligned with high precision, thereby realizing a highly efficient blower while reducing vibration and noise.

[0056] Next, the effects obtained by using a magnetic coupling type drive device in a mist generating device will be described.

[0057] By configuring the mist generator 1 using a magnetic coupling type drive unit, it is possible to prevent water in the water storage section 5 from entering the motor shaft 32 and causing damage to the motor 31, and like the blower device described above, it is possible to realize a highly efficient mist generator while reducing vibration and noise.

[0058] In this embodiment, the blades 11 are formed on the circumference of the rotor 6 at equal intervals and perpendicular to the direction of rotation of the rotor 6, but this is not limited to the above. For example, the blades 11 may be formed at uneven intervals or in a staggered pattern. In other words, any blade-shaped blade that can stir up water and generate mist by rotating the rotor 6 is included in the scope of the present invention.

[0059] Further, in this embodiment, the rotor 6 and the blower fan 7 are integrally formed, but they may be formed separately.

[0060] In addition, in this embodiment, water is atomized to generate mist, but essential oils, aroma oils, or other refining oils, or fragrances may be added to the water. In other words, water to which essential oils or other additives have been added is stirred up by the rotor 6, and the atomized mist is blown out as humidified air, thereby diffusing the fragrance while humidifying and cleaning the air in the room.

[0061] In addition, the other configurations used in the present embodiment are presented as examples, and are not intended to limit the scope of the invention, and may be embodied in various other forms, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the invention and its equivalents described in the claims. [Explanation of symbols]

[0062] 1. Mist generator 2 Blower unit case 2a Partition wall (blower unit case) 3 Intake port 4 Air outlet 5. Water storage section 6 Rotating Body 7 Blower fan 11 Feather 13 Rotation axis 14 Rotating body side magnet 20 Bulkhead side protrusion 21 Bulkhead side recess 22 Casing side protrusion 23 Casing side dent 24 Casing side support 30a Partition (Motor Case) 31 Motor 32 Motor shaft 34 Motor side magnet

Claims

1. A motor, A motor shaft which is an output shaft of the motor; a motor-side magnet connected to one end of the motor shaft and rotated by the motor; a rotor-side magnet that is disposed opposite the motor-side magnet via a partition wall and that rotates in association with the rotation of the motor-side magnet by being magnetically coupled with the motor-side magnet; a rotor that is rotationally driven by rotation of the rotor-side magnet; A rotation shaft fixed to the rotor and serving as a rotation center of the rotor, one end of the rotating shaft on the partition wall side has a protrusion, and the partition wall facing the protrusion has a curved partition wall side recess that abuts against the protrusion, a magnetic coupling type driving device including a casing at a position opposite to the other end of the rotating shaft, the casing having a cylindrical casing side recess for supporting the other end of the rotating shaft; a blower unit case having the partition wall formed on a side surface and an air inlet and an air outlet on an upper portion; a centrifugal blower fan formed integrally with the rotor, which blows air sucked in through the suction port and discharges it from the air outlet, The inside of the blower unit case is a rotor assembly including the rotor, the rotation shaft, the rotor magnet, and the blower fan; The casing is configured as follows: The casing is configured to surround an outer periphery of the rotor and the blower fan, a distance by which the other end of the rotating shaft moves in the axial direction from a state in which the other end of the rotating shaft is inserted to the innermost portion of the casing-side recess until the protrusion abuts against the partition wall is greater than a depth of the partition-wall-side recess, The blower device is configured so that after the rotor assembly is assembled to the casing, the rotor assembly and the casing can be assembled from the upper part of the blower unit case.

2. A motor, A motor shaft which is an output shaft of the motor; a motor-side magnet connected to one end of the motor shaft and rotated by the motor; a rotor-side magnet that is disposed opposite the motor-side magnet via a partition wall and that rotates in association with the rotation of the motor-side magnet by being magnetically coupled with the motor-side magnet; a rotor that is rotationally driven by rotation of the rotor-side magnet; A rotation shaft fixed to the rotor and serving as a rotation center of the rotor, one end of the rotating shaft on the partition wall side has a protrusion, and the partition wall facing the protrusion has a curved partition wall side recess that abuts against the protrusion, a magnetic coupling type drive device including a casing at a position opposite to the other end of the rotating shaft, the casing having a support for supporting the other end of the rotating shaft from above; a blower unit case having the partition wall formed on a side surface and an air inlet and an air outlet on an upper portion; a centrifugal blower fan formed integrally with the rotor, which blows air sucked in through the suction port and discharges it from the air outlet, The inside of the blower unit case is a rotor assembly including the rotor, the rotation shaft, the rotor magnet, and the blower fan; The casing is configured as follows: The casing is configured to surround an outer periphery of the rotor and the blower fan, a distance by which the protrusion moves in the axial direction from a state in which the other end of the rotating shaft abuts on the innermost portion of the pedestal in the axial direction until the protrusion abuts on the partition wall is greater than a depth of the partition wall-side recess, The blower device is configured so that after the rotor assembly is assembled to the casing, the rotor assembly and the casing can be assembled from the upper part of the blower unit case.

3. A water storage section for maintaining a predetermined water level in the air blower unit case, The rotor rotates while a part of its outer circumference is in contact with the water surface in the water storage section, and has a number of blades at its outer circumferential tip. The blades splash up the water to generate humidified air containing mist. The blower fan blows out the humidified air generated by the rotating body from the air outlet.

3. A mist generating device using the air blower according to claim 1 or 2.

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