Axial flow fan and dehumidifier with same

Abstract

The utility model provides an axial flow fan and a dehumidifier with the same. The axial flow fan comprises a fan body, an upper cover and a driving motor. The fan body comprises a motor cover cylinder, a lower cover located at the lower end of the motor cover cylinder and a plurality of fan blades arranged on the peripheral side of the outer side wall of the motor cover cylinder. The upper cover is arranged on the upper side of the fan body. The driving motor is arranged between the upper cover and the lower cover; the driving motor comprises a stator part fixed relative to the upper cover and a rotor part fixed relative to the fan body; the driving motor is configured to drive the rotor part to rotate relative to the stator part so as to drive the fan body to rotate relative to the upper cover. The rotor part comprises a supporting rotating shaft which is detachably and fixedly arranged relative to the lower cover. According to the axial flow fan, the lower cover of the fan body and the supporting rotating shaft of the driving motor are detachably and fixedly arranged, so that the driving motor is detachable relative to the fan body.

Description

Technical Field

[0001] This utility model relates to the field of home appliances, and in particular to an axial flow fan and a dehumidifier having the same. Background Technology

[0002] Air humidity has a significant impact on the comfort of the living environment. In southern regions and some coastal cities, residents often need dedicated dehumidifiers to regulate indoor air humidity. Compared to air conditioners with built-in dehumidification functions, household dehumidifiers have significant advantages in dehumidification efficiency, energy consumption, and noise. They can also control humidity more precisely and have less impact on ambient temperature. Therefore, families with dehumidification needs usually purchase dedicated household dehumidifiers.

[0003] Existing household dehumidifiers generally use axial fans for airflow exchange, and the drive motor and fan body of the axial fan need to be installed and fixed. In order to make the installation between the drive motor and the fan body more secure, existing axial fans generally reinforce the connection between the drive motor and the fan body in a non-removable manner. However, this also greatly increases the difficulty and cost of repairing the axial fan when the drive motor fails. Utility Model Content

[0004] One objective of this invention is to provide an axial fan with a detachable drive motor.

[0005] A further objective of this invention is to make the installation between the drive motor and the fan body more secure.

[0006] Another objective of this invention is to provide a dehumidifier that solves the aforementioned problems.

[0007] According to one aspect of the present invention, an axial flow fan is provided, comprising: a fan body, a top cover, and a drive motor.

[0008] The fan body includes a motor housing, a lower cover located at the lower end of the motor housing, and multiple fan blades disposed on the outer periphery of the outer wall of the motor housing.

[0009] The top cover is located on the upper side of the fan body.

[0010] The drive motor is located between the upper cover and the lower cover; the drive motor includes a stator fixed relative to the upper cover and a rotor fixed relative to the fan body; the drive motor is configured to cause the rotor to rotate relative to the stator, thereby driving the fan body to rotate relative to the upper cover.

[0011] The rotor section includes a support shaft, which is detachably fixed relative to the lower cover.

[0012] Optionally, a through hole with the same diameter as the support shaft is provided in the middle of the lower cover.

[0013] The support shaft passes downward through the through hole in the lower cover.

[0014] Furthermore, the rotor section also includes a fixing member, which is detachably mounted on the support shaft that passes downward through the lower cover and abuts against the lower cover to prevent the support shaft from moving up and down relative to the fan body.

[0015] Optionally, the sidewall of the lower part of the supporting shaft is threaded.

[0016] And the fastener is a nut.

[0017] Optionally, the side wall of the support shaft protrudes outward to form a limiting rib. The limiting rib is located on the upper side of the lower cover and abuts against the lower cover to prevent the support shaft from moving up and down relative to the fan body.

[0018] Optionally, the rotor section may also include: a retaining sleeve, a rotor magnet, and a limiting plate.

[0019] The fixed sleeve is fixedly installed relative to the lower cover; the fixed sleeve has a sleeve side plate in the shape of a cylindrical tube, and a sleeve bottom plate located at the lower end of the sleeve side plate and in contact with the lower cover; a shaft through hole is opened in the middle of the sleeve bottom plate for the support shaft to pass through.

[0020] The rotor magnet is located inside the fixed sleeve.

[0021] The limiting plate is located at the upper end of the support shaft to prevent the rotor from moving up and down relative to the stator.

[0022] Optionally, the lower surface of the sleeve base plate and the upper surface of the lower cover are formed with a fixed structure that fits the shape to prevent the fixed sleeve from rotating relative to the fan body.

[0023] Optionally, the lower cover protrudes upward along the periphery of the fixing sleeve to form a positioning rib.

[0024] Optionally, the middle of the sleeve base plate protrudes upward to form a support platform, and the shaft through hole is located at the center of the support platform; the support platform extends downward from the shaft through hole to form a fixed section.

[0025] Optionally, the stator includes: a fixed base, a coil assembly, and at least one annular bearing.

[0026] The mounting base is detachably fixed to the top cover.

[0027] The coil assembly is mounted on a fixed base and is used to controllably cause the rotor to rotate relative to the stator.

[0028] The inner ring of the ring bearing is fitted onto the supporting shaft, and the outer ring is mounted on the fixed base, thereby supporting the rotor and stator.

[0029] Optionally, the stator may also include a computer board.

[0030] The computer board is fixed on the base and electrically connected to the coil assembly.

[0031] Optionally, the drive motor may also include a mating part.

[0032] The mating parts include: two gaskets and / or damping pads.

[0033] Two gaskets are respectively fitted onto the support shaft; one gasket is located between the limiting plate and the stator, and the other gasket is located between the lower cover and the stator.

[0034] The damping plate is fitted onto the support shaft; the damping plate is located between the limiting plate and the stator and provides elastic force to push the stator away from the limiting plate.

[0035] Optionally, the axial fan also includes a fan housing.

[0036] The fan housing is located on the upper side of the fan body.

[0037] The fan housing has a ventilation grille that allows airflow to pass through at a position directly above and below the fan blades, and an upper cover that is directly above and below the motor housing.

[0038] Optionally, the fan housing is recessed downwards at a position directly opposite the motor housing to form a fixing groove, and the upper cover is located at the lower end of the fixing groove.

[0039] Axial fans also include decorative covers.

[0040] The decorative cover is detachably mounted on the upper end of the fixing groove to cover the fixing groove.

[0041] Optionally, the lower diameter of the fixed groove is greater than the inner cylinder diameter and less than the outer cylinder diameter.

[0042] Furthermore, the fan casing extends downward from the outside of the fixing groove to form a shielding part. The lower end diameter of the shielding part is larger than the diameter of the outer cylinder, and an insertion cavity with an opening facing downward is formed between the fixing groove and the shielding part.

[0043] The upper end of the outer cylinder extends into the insertion cavity.

[0044] According to another aspect of this utility model, a dehumidifier is provided. The dehumidifier includes a housing and an axial fan.

[0045] The housing has a side wall with an air inlet and a top wall with an air outlet.

[0046] An axial fan is disposed at the air outlet to promote the formation of an airflow that enters the housing from the air inlet and is blown out from the air outlet; the axial fan is any of the above-mentioned axial fans.

[0047] This utility model discloses an axial flow fan comprising a fan body, an upper cover, and a drive motor. The fan body includes a motor housing, a lower cover located at the lower end of the motor housing, and multiple fan blades disposed on the outer periphery of the outer wall of the motor housing. The upper cover is disposed on the upper side of the fan body. The drive motor is disposed between the upper and lower covers; the drive motor includes a stator fixed relative to the upper cover and a rotor fixed relative to the fan body; the drive motor is configured to cause the rotor to rotate relative to the stator, thereby driving the fan body to rotate relative to the upper cover. The rotor includes a supporting shaft, which is detachably fixed relative to the lower cover. This utility model discloses an axial flow fan by detachably fixing the lower cover of the fan body to the supporting shaft of the drive motor, making the drive motor detachable from the fan body.

[0048] Furthermore, the axial flow fan of this utility model also improves the shape of the drive motor and the fan body at the interface, and prevents the support shaft from moving up and down relative to the fan body and the fixed sleeve from rotating relative to the fan body by setting the limiting ribs and fixing parts on the support shaft, as well as the fixing structure formed on the lower surface of the sleeve bottom plate and the upper surface of the lower cover, thereby making the installation between the drive motor and the fan body more secure.

[0049] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of some specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0050] The following description, with reference to the accompanying drawings, will detail some specific embodiments of the present invention by way of example and not limitation. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0051] Figure 1 This is a schematic diagram of a dehumidifier according to one embodiment of the present invention;

[0052] Figure 2 This is a schematic exploded view of an axial flow fan according to an embodiment of the present invention;

[0053] Figure 3 This is a schematic cross-sectional view of an axial flow fan according to an embodiment of the present invention;

[0054] Figure 4 yes Figure 3 A partially enlarged schematic diagram of part A of the axial fan shown;

[0055] Figure 5 yes Figure 2 A schematic exploded view of the rotor section of the axial fan shown.

[0056] Figure 6 yes Figure 2 A schematic exploded view of the stator section of the axial flow fan shown.

[0057] Figure 7 yes Figure 2 A schematic diagram of the mating parts of the axial fan shown;

[0058] Figure 8 yes Figure 3 A partially enlarged schematic diagram of section B of the axial fan shown. Detailed Implementation

[0059] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," etc., may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature.

[0061] In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0062] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," and "coupling," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] Furthermore, in the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0064] In other words, in the description of this utility model, "above," "on top of," and "over" the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. "Below," "under," or "below" the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this utility model, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, device, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, devices, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Unless otherwise specified, all terms (including technical and scientific terms) used in the description of the embodiments of this utility model shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0067] Figure 1 This is a schematic diagram of a dehumidifier 1 according to an embodiment of the present invention; Figure 2 This is a schematic exploded view of an axial fan 3 according to an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of an axial fan 3 according to an embodiment of the present invention; Figure 4 yes Figure 3 A partially enlarged schematic diagram of part A of the axial fan 3 shown; Figure 5 yes Figure 2A schematic exploded view of the rotor section 34 of the axial fan 3 shown; Figure 6 yes Figure 2 A schematic exploded view of the stator section 32 of the axial fan 3 shown; Figure 7 yes Figure 2 A schematic diagram of the mating part 36 of the axial fan 3 shown; Figure 8 yes Figure 3 A partially enlarged schematic diagram of part B of the axial fan 3 shown.

[0068] refer to Figure 1 and Figure 2 As shown, this embodiment provides a dehumidifier 1, which includes a casing 2 and an axial fan 3, and generally also includes components such as a water tank, a heat exchanger assembly, a compressor, a throttling device, and a temperature sensor (not shown in the figure). The casing 2 has an air inlet and an air outlet. The heat exchanger assembly is disposed inside the casing 2 and includes an evaporator and a condenser. The fan is disposed inside the casing 2 and causes air to enter the casing 2 through the air inlet, flow through the evaporator and condenser, and then be blown out through the air outlet.

[0069] Because the surface temperature of the evaporator is lower than the dew point temperature of the air, water vapor in the air condenses on the evaporator surface and flows into the water tank, thereby reducing the air humidity. As the humidity of the air flowing through the evaporator decreases, its temperature is also reduced. This air then passes through the condenser, is heated, and is discharged from the casing 2 through the air outlet. Therefore, the outlet air temperature and inlet air temperature of the dehumidifier 1 are similar, and it does not significantly affect the temperature of the ambient air while dehumidifying.

[0070] The heat exchanger assembly is usually located in the upper part of the casing 2, while the water tank is located in the lower part of the casing 2, so that the condensate formed on the surface of the evaporator flows downward under its own gravity and eventually flows into the water tank. Therefore, the air inlet of the dehumidifier 1 is also opened in the upper part of the side wall of the casing 2.

[0071] The dehumidifier 1 of this embodiment has a casing 2 with an air inlet on the side wall and an air outlet on the top wall. Figure 1 In the illustrated embodiment, the casing 2 is designed as a cuboid with air inlets on multiple side walls to increase the air intake of the dehumidifier 1 and improve dehumidification efficiency. The design of the air outlet on the top wall minimizes interference between the air intake and exhaust of the dehumidifier 1, thereby improving the overall airflow efficiency of the environment. In other embodiments, the casing 2 may also be designed as a triangular prism, hexagonal prism, or other shapes, with a varying number of side walls; this is not limited here.

[0072] refer to Figure 1 As shown, the air inlet of the dehumidifier 1 can be divided into multiple smaller ventilation holes by a mesh grille to prevent foreign objects from being sucked into the dehumidifier 1.

[0073] refer to Figure 2 , Figure 3 and Figure 4 As shown, the axial fan 3 in this embodiment includes a fan body 10, an upper cover 22, and a drive motor 30.

[0074] The fan body 10 includes a motor housing 12, a lower cover 14 located at the lower end of the motor housing 12, and a plurality of fan blades 16 disposed on the periphery of the outer side wall of the motor housing 12. An upper cover 22 is disposed on the upper side of the fan body 10. A drive motor 30 is disposed between the upper cover 22 and the lower cover 14; the drive motor 30 includes a stator portion 32 fixed relative to the upper cover 22 and a rotor portion 34 fixed relative to the fan body 10; the drive motor 30 is configured to cause the rotor portion 34 to rotate relative to the stator portion 32, thereby driving the fan body 10 to rotate relative to the upper cover 22. The rotor portion 34 includes a support shaft 342, which is detachably fixed relative to the lower cover 14.

[0075] The axial flow fan 3 of this utility model is detachably fixed to the lower cover 14 of the fan body 10 and the support shaft 342 of the drive motor 30, so that the drive motor 30 is detachable from the fan body 10.

[0076] In this embodiment, a certain structure is fixed relative to another structure. For example, the stator part 32 is fixed relative to the upper cover 22. This includes both the stator part 32 and the upper cover 22 being in direct contact and fixed, and the stator part 32 and the upper cover 22 being separated by a third structure, with the stator part 32 and the upper cover 22 respectively in direct contact and fixed with this third structure.

[0077] In this embodiment, the stator portion 32 is preferably in direct contact with and fixed to the upper cover 22. In short, the stator portion 32 is directly fixed to the upper cover 22, or the stator portion 32 is fixed to the upper cover 22.

[0078] In some alternative implementations, the drive motor 30 is a DC motor. That is, the drive motor 30 in this embodiment is a motor driven by direct current.

[0079] In some alternative embodiments, the lower cover 14 has a through hole in its center with the same diameter as the support shaft 342. The support shaft 342 passes downward through the through hole of the lower cover 14. The rotor portion 34 also includes a fixing member 344, which is detachably mounted on the support shaft 342 that passes downward through the lower cover 14 and abuts against the lower cover 14 to prevent the support shaft 342 from moving up and down relative to the fan body 10.

[0080] refer to Figure 3 and Figure 4As shown, in this embodiment, the support shaft 342 passes downward through the through hole of the lower cover 14 and is partially exposed below the lower cover 14. The fixing member 344 is detachably provided on the exposed part at the lower end of the support shaft 342, thereby preventing the fan body 10 from falling off the support shaft 342. This embodiment fixes the fan body 10 and the support shaft 342 by providing a detachable fixing member 344, replacing the existing non-removable reinforcement method, including bonding the two together with adhesives such as glue, thereby making the drive motor 30 detachable from the fan body 10.

[0081] In some alternative embodiments, the sidewall of the lower part of the supporting shaft 342 is threaded. And the fastener 344 is a nut.

[0082] refer to Figure 4 and Figure 5 As shown, in this embodiment, the support shaft 342 has threads formed on at least the portion of its sidewall that passes downward through the through hole of the lower cover 14, so that the fastener 344 can be securely mounted on the support shaft 342 after it is installed to abut against the lower cover 14. Furthermore, in some optional embodiments, the support shaft 342 also has threads formed on the sidewall corresponding to the position of the through hole in the lower cover 14, and the sidewall of the through hole in the lower cover 14 also has threads that engage with the support shaft 342. The rotation direction of the threads can correspond to the rotation direction of the rotor portion 34 of the drive motor 30, and is configured such that when the rotor portion 34 rotates, the support shaft 342 rotates relative to the lower cover 14 in a direction that tends to tighten the threads or tends to move the lower cover 14 upwards, thereby preventing the fastener 344 from slipping and the fan body 10 from falling off when the axial fan 3 is operating.

[0083] In some alternative embodiments, the sidewall of the support shaft 342 protrudes outward to form a limiting rib 3422, which is located on the upper side of the lower cover 14 and abuts against the lower cover 14 to prevent the support shaft 342 from moving up and down relative to the fan body 10.

[0084] refer to Figure 4 and Figure 5 As shown, in this embodiment, the sidewall of the support shaft 342 protrudes outward and forms a limiting rib 3422 with a diameter larger than the diameter of the through hole in the lower cover 14. The limiting rib 3422 is part of the support shaft 342. After the support shaft 342 is inserted downward into the through hole of the lower cover 14, the limiting rib 3422 can prevent the support shaft 342 from being inserted further downward when it abuts against the upper surface of the lower cover 14. The limiting rib 3422 on the support shaft 342 and the fixing member 344 can clamp the lower cover 14 between them, thereby preventing the support shaft 342 from moving upward or downward relative to the fan body 10.

[0085] refer to Figure 4 and Figure 5As shown, in some optional embodiments, the rotor portion 34 further includes a fixing sleeve 346, a rotor magnet 348, and a limiting plate 350. The fixing sleeve 346 is fixedly disposed relative to the lower cover 14; the fixing sleeve 346 has a cylindrical sleeve side plate 3462 and a sleeve bottom plate 3464 located at the lower end of the sleeve side plate 3462 and in contact with the lower cover 14; a shaft through hole is provided in the middle of the sleeve bottom plate 3464 for the support shaft 342 to pass through. The rotor magnet 348 is disposed inside the fixing sleeve 346. The limiting plate 350 is disposed at the upper end of the support shaft 342 to prevent the rotor portion 34 from moving up and down relative to the stator portion 32.

[0086] Driven by the stator 32, the rotor 34 of the drive motor 30 drives the fan body 10 to rotate relative to the upper cover 22. The supporting shaft 342 of the rotor 34 passes through a shaft through-hole on the fixing sleeve 346. The diameter of the shaft through-hole matches that of the supporting shaft 342 and is tightly fitted to the side wall of the supporting shaft 342. The fixing effect between the supporting shaft 342 and the fixing sleeve 346 can be enhanced by applying adhesive such as glue. The sleeve base plate 3464 of the fixing sleeve 346 is attached to the lower cover 14 of the fan body 10, and the supporting shaft 342 is also fixed relative to the lower cover 14. Therefore, when the rotor 34 rotates, it can drive the fan body 10 to rotate synchronously.

[0087] In this embodiment, by setting a fixing sleeve 346, the support shaft 342 and rotor magnet 348 in the rotor part 34 can be pre-installed on the fixing sleeve 346 and installed together on the fan body 10. It is even possible to install the entire drive motor 30 on the fan body 10 after the stator part 32 is also installed as a whole. Therefore, the axial flow fan 3 in this embodiment is more conducive to modular production.

[0088] To make the drive motor 30 detachable from the fan body 10, this embodiment does not use adhesives such as glue to enhance the fixing effect between the sleeve base plate 3464 and the lower cover 14. To prevent insufficient adhesion between the sleeve base plate 3464 and the lower cover 14, which could cause the rotor 34 to rotate relative to the fan body 10, in some optional embodiments, a matching fixing structure is formed on the lower surface of the sleeve base plate 3464 and the upper surface of the lower cover 14 to prevent the fixing sleeve 346 from rotating relative to the fan body 10.

[0089] The fixing structure described in this embodiment can be a protrusion and a groove formed on the lower surface of the sleeve base plate 3464 and the upper surface of the lower cover 14, with matching shapes. The protrusion and groove preferably extend along the diameter direction of the sleeve base plate 3464 and the lower cover 14 to have a larger contact area when the rotor 34 drives the fan body 10 to rotate. The fixing structure only prevents the fixing sleeve 346 from rotating relative to the fan body 10, but does not prevent the fixing sleeve 346 from moving up and down relative to the fan body 10, so it will not hinder the disassembly of the drive motor 30 relative to the fan body 10.

[0090] In some alternative embodiments, the lower cover 14 protrudes upward along the periphery of the fixing sleeve 346 to form a positioning rib 142.

[0091] refer to Figure 5 As shown, the positioning rib 142 is formed around the fixed sleeve 346, thus facilitating positioning when the fixed sleeve 346 is installed onto the fan body 10. At the same time, the positioning rib 142 can also prevent the fixed sleeve 346 from moving laterally relative to the fan body 10 and plays an auxiliary role in fixing the rotor part 34.

[0092] In some alternative embodiments, the middle of the sleeve base plate 3464 protrudes upward to form a support platform 3466, and the pivot hole is located at the center of the support platform 3466; the support platform 3466 extends downward from the pivot hole to form a fixed section 3468.

[0093] refer to Figure 4 As shown, the support platform 3466 supports the stator section 32 and positions it away from the fan base of the fan body 10, thereby adjusting the position of the stator section 32. Therefore, the shape of the support platform 3466 can be adjusted according to the actual shape and structure of the drive motor 30, especially the stator section 32. The fixing section 3468 extends downward from the shaft through-hole to increase the contact area between the fixing sleeve 346 and the supporting shaft 342, thereby better securing the supporting shaft 342.

[0094] In some alternative embodiments, the stator portion 32 includes a fixed base 322, a coil assembly 324, and at least one annular bearing 326. The fixed base 322 is detachably fixed to the upper cover 22. The coil assembly 324 is disposed on the fixed base 322 for controlled rotation of the rotor portion 34 relative to the stator portion 32. The inner ring of the annular bearing 326 is sleeved on a support shaft 342, and the outer ring is disposed on the fixed base 322, thereby supporting the rotor portion 34 and the stator portion 32.

[0095] Multiple screw holes with opposing positions can be pre-formed on the fixed base 322 and the upper cover 22 to facilitate fixing the stator part 32 to the upper cover 22 using screws. The coil assembly 324 is fixed to the outer surface of the fixed base 322 in an axially detachable but non-rotatable manner. After the stator part 32 is installed relative to the rotor part 34, the outer end of the coil assembly 324 is opposite to the inner surface of the rotor magnet 348. The coil assembly 324 typically includes two parts: a coil for generating a magnetic field when energized and an iron core for fixing the coil. The shape of the iron core and the number and position of the coils can be set according to actual needs.

[0096] To enable the rotor portion 34 to rotate more effectively relative to the stator portion 32, the stator portion 32 in this embodiment further includes at least one annular bearing 326. The annular bearing 326 can be a ball bearing or other existing types of bearings, which are not limited here. To fix the axial position of the annular bearing 326 relative to the fixed base 322 and the supporting shaft 342, the number of annular bearings 326 can be two, as shown in the figure, and they are spaced vertically apart in the axial direction. The lower side and inner ring of the annular bearing 326 located on the lower axial side are supported by the support platform 3466, while the upper side and outer ring are supported by the fixed base 322 forming a support groove; the lower side and outer ring of the annular bearing 326 located on the upper axial side are supported by the fixed base 322 forming a support groove, while the upper side and inner ring are limited by the limiting piece 350. During the assembly of the axial fan 3, a fixed sleeve 346, two annular bearings 326 and a limiting plate 350 are sequentially fitted onto the support shaft 342 from bottom to top. The fixed base 322 is supported by the two annular bearings 326. Therefore, the rotor part 34 rotatably limits the stator part 32 between the fixed sleeve 346 and the limiting plate 350 of the rotor part 34.

[0097] In this embodiment, the axial fan 3, through the above-described configuration, ensures that the stator 32 and rotor 34 are relatively fixed in the axial direction even without a housing.

[0098] The existing axial fan 3's drive motor 30 requires the stator 32 and rotor 34 to be housed within a closed housing. Only the rotor shaft of the rotor 34 extends beyond the housing. Therefore, the portion of the shaft extending beyond the housing, along with the unutilized internal space due to the housing enclosure, results in a larger axial dimension for the drive motor 30. Furthermore, to secure it to the housing, the axial fan 3 requires a motor bracket or other mounting structure at the drive motor's mounting location, further increasing both the axial and radial dimensions. To secure the shaft extending beyond the housing, the fan body 10 also requires mounting holes of a certain length in the axial direction, again increasing the axial dimension of the axial fan 3. These combined problems lead to an increased size of the axial fan 3, requiring more installation space and hindering the miniaturization of household dehumidifiers.

[0099] refer to Figure 3 , Figure 5 and Figure 6 As shown, the axial fan 3 of this embodiment creatively changes the structure of the drive motor 30. The coil assembly 324 is designed as part of the stator 32 and remains fixed when the drive motor 30 is working, while the rotor magnet 348 is designed as part of the rotor 34 and is driven to rotate by the stator 32. At the same time, this embodiment provides a fixing sleeve 346 to fix the rotor magnet 348 to the support shaft 342 and rotate synchronously. The fixing sleeve 346 replaces the housing of the existing drive motor 30. Therefore, the drive motor 30 of this embodiment does not need to be provided with an additional housing structure. Correspondingly, the increase in the axial and radial dimensions of the axial fan 3 caused by the provision of a housing structure is also avoided. Therefore, the axial fan 3 of this embodiment is smaller in size than the existing axial fan 3 while having the same specifications as the fan body 10. In addition, since the axial fan 3 of this embodiment omits the housing of the drive motor 30 compared to the existing axial fan 3, it also saves material costs for processing the housing and simplifies the assembly process. This simplifies the original process of encapsulating the stator 32 and rotor 34 into the housing before installing the drive motor 30 to directly installing the stator 32 and rotor 34.

[0100] In some alternative embodiments, the stator section 32 also includes a computer board 328. The computer board 328 is fixed to the mounting base 322 and electrically connected to the coil assembly 324.

[0101] refer to Figure 3 and Figure 6 As shown, since the drive motor 30 in this embodiment does not have a housing, the computer board 328 for controlling the drive motor 30 can be directly fixed to the fixing base 322. The computer board 328 can be disposed between the coil assembly 324 and the upper cover 22 to make full use of the space formed by the need to form screw holes and other structures for fixing to the upper cover 22 at the upper end of the fixing base 322.

[0102] refer to Figure 4 and Figure 7 As shown, in some optional embodiments, the drive motor 30 further includes a mating portion 36. The mating portion 36 includes two gaskets 362 and / or a damping plate 364. The two gaskets 362 are respectively sleeved on the support shaft 342; one gasket 362 is located between the limiting plate 350 and the stator portion 32, and the other gasket 362 is located between the lower cover 14 and the stator portion 32. The damping plate 364 is sleeved on the support shaft 342; the damping plate 364 is located between the limiting plate 350 and the stator portion 32, and provides a spring force to push the stator portion 32 away from the limiting plate 350.

[0103] In some alternative embodiments, the axial fan 3 also includes a fan housing 20. (See reference...) Figure 2 and Figure 3 As shown, the fan housing 20 is disposed on the upper side of the fan body 10. The fan housing 20 has a ventilation grille 24 for airflow to pass through at a position directly opposite to the fan blades 16, and an upper cover 22 at a position directly opposite to the motor housing 12.

[0104] Furthermore, in some alternative embodiments, the fan housing 20 is recessed downwards at a position directly opposite the motor housing 12 to form a fixing groove 26, and the upper cover 22 is part of the fan housing 20 and located at the lower end of the fixing groove 26. The axial fan 3 also includes a decorative cover 40. The decorative cover 40 is detachably disposed on the upper end of the fixing groove 26 to cover the fixing groove 26.

[0105] In this embodiment, the fan housing 20, by forming a fixing groove 26 and providing a decorative cover 40, can cover the upper cover 22 with screw holes, thereby making the axial fan 3 more aesthetically pleasing. The decorative cover 40 can be a display and control panel for displaying information and facilitating manual control by the user, and the display and control panel can be installed inside the fixing groove 26.

[0106] refer to Figure 8 As shown, in some alternative embodiments, the fan housing 20 further extends downward from the outside of the fixing groove 26 to form a blocking portion 28, and a downward-opening insertion cavity is formed between the fixing groove 26 and the blocking portion 28. The upper end of the motor cover 12 of the fan body 10 extends into the insertion cavity.

[0107] In order to better protect the drive motor 30 and prevent dust or other foreign objects from entering with the airflow, the axial fan 3 of this embodiment also makes full use of the shape of the motor cover 12 of the fan body 10 to match the fan housing 20. A shielding part is formed on the fan housing 20 to define the insertion cavity together with the fixing groove 26. By extending the upper end of the motor cover 12 into the insertion cavity, it is more difficult for the airflow to enter the drive motor 30.

[0108] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An axial flow fan, characterized in that... include: The fan body includes a motor housing, a lower cover located at the lower end of the motor housing, and a plurality of fan blades disposed on the periphery of the outer wall of the motor housing. The top cover is located on the upper side of the fan body; as well as A drive motor is disposed between the upper cover and the lower cover; the drive motor includes a stator fixed relative to the upper cover and a rotor fixed relative to the fan body; the drive motor is configured to cause the rotor to rotate relative to the stator, thereby driving the fan body to rotate relative to the upper cover. in The rotor includes a support shaft that is detachably fixed relative to the lower cover.

2. The axial flow fan according to claim 1, characterized in that... The lower cover has a through hole in the middle with the same diameter as the supporting shaft; The supporting pivot passes downward through the through hole of the lower cover; and The rotor also includes a fixing member, which is detachably mounted on the support shaft that passes downward through the lower cover and abuts against the lower cover to prevent the support shaft from moving up and down relative to the fan body.

3. The axial flow fan according to claim 2, characterized in that... The lower sidewall of the supporting shaft is threaded; and The fastener is a nut.

4. The axial flow fan according to claim 2, characterized in that... The side wall of the supporting shaft protrudes outward to form a limiting rib. The limiting rib is located on the upper side of the lower cover and abuts against the lower cover, and is used to prevent the supporting shaft from moving up and down relative to the fan body.

5. The axial flow fan according to claim 1, characterized in that... The rotor section also includes: A fixed sleeve is fixedly disposed relative to the lower cover; the fixed sleeve has a sleeve side plate in the shape of a cylindrical tube, and a sleeve bottom plate located at the lower end of the sleeve side plate and in contact with the lower cover; a shaft through hole is opened in the middle of the sleeve bottom plate for the support shaft to pass through. Rotor magnet, disposed inside the fixed sleeve; and A limiting piece is disposed at the upper end of the supporting shaft to prevent the rotor from moving up and down relative to the stator.

6. The axial flow fan according to claim 5, characterized in that... The lower surface of the sleeve base plate and the upper surface of the lower cover are formed with a fixed structure that fits the shape, which is used to prevent the fixed sleeve from rotating relative to the fan body.

7. The axial flow fan according to claim 5, characterized in that... The lower cover protrudes upward along the circumference of the fixing sleeve to form a positioning rib.

8. The axial flow fan according to claim 5, characterized in that, The middle part of the sleeve base plate protrudes upward to form a support platform, and the pivot hole is located at the center of the support platform; the support platform extends downward from the pivot hole to form a fixed section.

9. The axial flow fan according to claim 5, characterized in that... The stator section includes: A fixed base is detachably fixed to the upper cover; A coil assembly, disposed on the fixed base, for controllably causing the rotor portion to rotate relative to the stator portion; and At least one annular bearing, wherein the inner ring of the annular bearing is sleeved on the supporting shaft and the outer ring is disposed on the fixed base, thereby supporting the rotor section and the stator section.

10. The axial flow fan according to claim 9, characterized in that... The stator section also includes: The computer board is fixed on the fixed base and electrically connected to the coil assembly.

11. The axial flow fan according to claim 5, characterized in that... The drive motor also includes: The mating part includes: Two gaskets are respectively fitted onto the support shaft; one gasket is located between the limiting piece and the stator, and the other gasket is located between the lower cover and the stator; and / or A damping plate is sleeved on the supporting shaft; the damping plate is located between the limiting plate and the stator portion, and provides an elastic force to push the stator portion away from the limiting plate.

12. The axial flow fan according to claim 1, characterized in that... Also includes: A fan housing is disposed on the upper side of the fan body; The fan housing has a ventilation grille for airflow at a position directly opposite the fan blades, and an upper cover at a position directly opposite the motor housing.

13. The axial flow fan according to claim 12, characterized in that, The fan housing is recessed downwards at a position directly opposite the motor housing to form a fixing groove, and the upper cover is located at the lower end of the fixing groove. The axial fan also includes: A decorative cover is detachably mounted on the upper end of the fixing groove to cover the fixing groove.

14. A dehumidifier, characterized in that... include: The housing has a side wall with an air inlet and a top wall with an air outlet. An axial fan is disposed at the air outlet to promote the formation of an airflow that enters the housing from the air inlet and is blown out from the air outlet; the axial fan is an axial fan according to any one of claims 1 to 13.

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