Axial flow fan and dehumidifier with same

Abstract

The invention provides an axial flow fan and a dehumidifier with the same. The axial flow fan comprises a fan body, a front cover and a driving motor. A motor cavity with an opening facing the axial front end is defined in the middle of the fan body. The front cover is arranged on the front side of the fan body and used for shielding the opening of the motor cavity. The driving motor is arranged in the motor cavity; the driving motor comprises a stator part fixed relative to the front 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 front cover. According to the axial flow fan, the motor cavity defined by the fan body and the front cover for shielding the opening of the motor cavity are used for protecting the driving motor, a shell structure, a motor support and other structures of the driving motor are omitted, and therefore the size of the axial flow fan is smaller.

Description

Technical Field

[0001] This invention 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 air exchange. However, the drive motor of the axial fan itself has a housing. When this drive motor is installed on the fan body, it requires more axial space and additional structures such as motor brackets for fixation. As a result, the axial fan is larger and occupies more installation space, which is not conducive to the miniaturization of household dehumidifiers. Summary of the Invention

[0004] One objective of this invention is to provide a smaller axial fan.

[0005] Another objective of the present invention is to provide a dehumidifier that solves the above-mentioned problems.

[0006] According to one aspect of the present invention, an axial fan is provided, comprising: a fan body, a front cover, and a drive motor.

[0007] The middle of the fan body defines a motor cavity with an opening facing the axial front end.

[0008] The front cover is located on the front side of the fan body and is used to cover the opening of the motor cavity.

[0009] The drive motor is located inside the motor cavity; the drive motor includes a stator fixed relative to the front 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 causing the fan body to rotate relative to the front cover.

[0010] Optionally, the fan body includes: a motor housing, a rear cover, and multiple fan blades.

[0011] The motor housing has an outer and inner wall that are cylindrical in shape.

[0012] The rear cover is located at the axial rear end of the motor housing and together with the motor housing defines the motor cavity.

[0013] Multiple fan blades are arranged on the outer side of the motor housing.

[0014] Optionally, the motor housing includes an inner cylinder and an outer cylinder, both cylindrical in shape, with the inner cylinder having a smaller diameter than the outer cylinder and positioned in the middle of the outer cylinder; and a plurality of reinforcing ribs extending radially between the outer cylinder and the inner cylinder.

[0015] The rear cover is located at the axial rear end of both the inner and outer cylinders, and together with the inner cylinder, defines the motor cavity.

[0016] Optionally, the rotor section includes: a support shaft, a rotor magnet, and a limiting plate.

[0017] The support shaft is set along the axial direction of the motor housing and fixed relative to the rear cover.

[0018] The rotor magnet is fixed relative to the inner wall of the motor housing.

[0019] The limiting plate is located at the front end of the supporting shaft to prevent the rotor from moving axially relative to the stator.

[0020] Optionally, the rotor section may also include a retaining sleeve.

[0021] The fixed sleeve has a cylindrical sleeve side plate and a sleeve bottom plate located at the axial rear end of the sleeve side plate; a shaft through hole is opened in the middle of the sleeve bottom plate for the support shaft to pass through.

[0022] The fixed sleeve is set inside the motor cavity, and the sleeve side plate is in contact with the motor cover, and the sleeve bottom plate is in contact with the rear cover; the rotor magnet is fixed on the inner wall of the sleeve side plate.

[0023] Optionally, the middle of the sleeve base plate protrudes forward to form a support platform, and the shaft through hole is located at the center of the support platform; the support platform extends backward from the shaft through hole to form a fixed section.

[0024] Optionally, the stator includes: a fixed base, a coil assembly, and at least one annular bearing.

[0025] The fixed base is fixedly mounted on the front cover.

[0026] The coil assembly is fixed on a fixed base and is used to controllably cause the rotor to rotate relative to the stator.

[0027] The inner ring of the ring bearing is sleeved on the supporting shaft, and the outer ring is set on the fixed base, thereby supporting the rotor and stator and spacing the rotor and stator apart.

[0028] Optionally, the stator may also include a computer board.

[0029] The computer board is fixed on the base and electrically connected to the coil assembly.

[0030] Optionally, the drive motor may also include a mating part.

[0031] The mating parts include: two gaskets and / or damping pads.

[0032] 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 rear cover and the stator.

[0033] 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.

[0034] Optionally, the axial fan also includes a fan housing.

[0035] The fan housing is located on the front side of the fan body.

[0036] The fan housing has a ventilation grille for airflow at a position directly opposite the front and rear of the fan blades, and a front cover at a position directly opposite the front and rear of the motor housing.

[0037] Optionally, the fan housing is recessed rearward at a position directly opposite the front and rear of the motor housing to form a fixing groove, and the front cover is located at the rear end of the fixing groove.

[0038] Axial fans also include decorative covers.

[0039] The decorative cover is detachably mounted on the front end of the fixing groove to cover the fixing groove.

[0040] Optionally, the rear end diameter of the fixed groove is larger than the inner cylinder diameter and smaller than the outer cylinder diameter.

[0041] Furthermore, the fan casing extends rearward from the outside of the fixing groove to form a shielding part. The rear diameter of the shielding part is larger than the diameter of the outer cylinder, and an insertion cavity with a rearward opening is formed between the fixing groove and the shielding part.

[0042] The front end of the outer cylinder extends into the insertion cavity.

[0043] According to another aspect of the present invention, a dehumidifier is provided. The dehumidifier includes a main body and an axial fan.

[0044] The main body has an air inlet and an air outlet.

[0045] An axial fan is installed on the main body and is used to promote the formation of airflow that enters the main body from the air inlet and is blown out from the air outlet; the axial fan is any of the above-mentioned axial fans.

[0046] The axial fan of the present invention defines a motor cavity in the middle of the fan body and sets a front cover on the front side of the fan body to cover the opening of the motor cavity. By fixing the stator part of the drive motor relative to the front cover and fixing the rotor part relative to the fan body, the drive motor is protected by the motor cavity defined by the fan body and the front cover that covers the opening of the motor cavity, and the outer shell structure and motor bracket structure of the drive motor itself are eliminated, thereby making the axial fan smaller.

[0047] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of some specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0048] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0049] Figure 1 This is a schematic diagram of a dehumidifier according to an embodiment of the present invention;

[0050] Figure 2 This is a schematic exploded view of an axial flow fan according to an embodiment of the present invention;

[0051] Figure 3 This is a schematic cross-sectional view of an axial flow fan according to an embodiment of the present invention;

[0052] Figure 4 yes Figure 2 A schematic exploded view of the rotor section of the axial fan shown.

[0053] Figure 5 yes Figure 2 A schematic exploded view of the stator section of the axial flow fan shown.

[0054] Figure 6 yes Figure 3 A partially enlarged schematic diagram of part A of the axial fan shown;

[0055] Figure 7 yes Figure 2 A schematic diagram of the mating parts of the axial fan shown;

[0056] Figure 8 yes Figure 3 A partially enlarged schematic diagram of section B of the axial fan shown. Detailed Implementation

[0057] 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 the present invention 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 the present invention.

[0058] 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.

[0059] In the description of this invention, "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.

[0060] 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 invention according to the specific circumstances.

[0061] Furthermore, in the description of the present invention, 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.

[0062] In other words, in the description of this invention, "above," "over," and "on top" of 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," "below," or "under" 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.

[0063] In the description of this invention, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, apparatus, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, apparatus, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] Unless otherwise specified, all terms (including technical and scientific terms) used in the description of the embodiments of the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0065] 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.

[0066] refer to Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides an axial flow fan 3, which is mainly used in a dehumidifier 1. The axial flow fan 3 includes a fan body 10, a front cover 22, and a drive motor 30.

[0067] The fan body 10 defines a motor cavity with an opening facing its axial front end at its center. A front cover 22 is disposed on the front side of the fan body 10 and is used to cover the opening of the motor cavity. A drive motor 30 is disposed within the motor cavity; the drive motor 30 includes a stator portion 32 fixed relative to the front 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 front cover 22.

[0068] 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 of the axial fan 3. To secure it to 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, occupying more installation space and hindering the miniaturization of the household dehumidifier 1.

[0069] refer to Figure 2 and Figure 3 As shown, in this embodiment, the axial fan 3 defines a motor cavity in the middle of the fan body 10, and a front cover 22 is provided on the front side of the fan body 10 to cover the opening of the motor cavity. By fixing the stator 32 of the drive motor 30 relative to the front cover 22 and fixing the rotor 34 relative to the fan body 10, the drive motor 30 eliminates the need for a housing structure. Correspondingly, the increase in the axial and radial dimensions of the axial fan 3 caused by setting a housing structure is also avoided. Therefore, the axial fan 3 of this embodiment is smaller in volume than the existing axial fan 3 while maintaining the same specifications for the fan body 10. In addition, since the axial fan 3 of this embodiment eliminates the housing structure 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. The process that originally required first encapsulating the stator 32 and rotor 34 into the housing and then installing the drive motor 30 is simplified to directly installing the stator 32 and rotor 34.

[0070] In this embodiment, a certain structure is fixed relative to another structure. For example, the stator part 32 is fixed relative to the front cover 22. This includes both the stator part 32 and the front cover 22 being in direct contact and fixed, and the stator part 32 and the front cover 22 being separated by a third structure, with the stator part 32 and the front cover 22 being in direct contact and fixed to this third structure respectively.

[0071] In this embodiment, the stator portion 32 is preferably in direct contact with and fixed to the front cover 22. In short, the stator portion 32 is directly fixed to the front cover 22, or the stator portion 32 is fixed to the front cover 22.

[0072] In this embodiment, the drive motor 30 is located inside the motor cavity. Its peripheral and axial rear sides are protected by the fan body 10, and its front side is protected by the front cover 22. Therefore, although the outer shell structure is omitted, the fan body 10 and the front cover 22 are equivalent to the outer shell of the drive motor 30 in terms of protecting the drive motor 30. Dust and other impurities are still not easy to enter the drive motor 30 and cause damage.

[0073] It should be noted that the reference Figure 2 The front and rear directions indicated in the figure, as described in this embodiment, refer to the axial front and rear ends located on the straight line of the rotation axis of the fan body 10. The front-rear direction is only a relative positional relationship and has no direct relation to the shape, position, or orientation of the axial fan 3 itself. For example, the axial front of the fan body 10 can be as follows: Figure 1 The dehumidifier 1, which is equipped with an axial fan 3, is shown above the dehumidifier 1. The stator 32 and rotor 34 of the drive motor 30 are both located within the motor cavity defined by the fan body 10. Therefore, the axial front-back direction of the stator 32 and rotor 34 of the drive motor 30 is consistent with that of the fan body 10, while the front-back direction of the other parts of the axial fan 3 is adapted to either the fan body 10 or the stator 32 and rotor 34 of the drive motor 30.

[0074] refer to Figure 2 and Figure 3 As shown, in some alternative embodiments, the fan body 10 includes a motor housing 12, a rear cover 14, and a plurality of fan blades 16.

[0075] The motor housing 12 has an outer and inner sidewalls in the shape of a cylindrical tube. A rear cover 14 is disposed at the axial rear end of the motor housing 12 and together with the motor housing 12 defines the motor cavity. A plurality of fan blades 16 are disposed on the periphery of the outer sidewall of the motor housing 12.

[0076] Furthermore, in some optional embodiments, the motor housing 12 includes an inner cylinder 122 and an outer cylinder 124, both cylindrical in shape. The diameter of the inner cylinder 122 is smaller than the diameter of the outer cylinder 124 and is disposed in the middle of the outer cylinder 124. A plurality of reinforcing ribs 126 extend radially between the outer cylinder 124 and the inner cylinder 122. The rear cover 14 is located at the axial rear end of both the inner cylinder 122 and the outer cylinder 124, and together with the inner cylinder 122, defines the motor cavity.

[0077] refer to Figure 3 As shown, the motor housing 12 in this embodiment consists of an inner cylinder 122 and an outer cylinder 124, with the axes of the inner cylinder 122 and the outer cylinder 124 coinciding. The inner wall of the inner cylinder 122 serves as the inner wall of the motor housing 12, and together with the front side of the rear cover 14, defines the motor cavity. The outer wall of the outer cylinder 124 serves as the outer wall of the motor housing 12. The fan blades 16 are as follows... Figure 2 As shown, the outer cylinder 124 is uniformly distributed circumferentially on its outer side wall. Multiple reinforcing ribs 126 are evenly distributed circumferentially between the outer cylinder 124 and the inner cylinder 122. Each reinforcing rib 126 extends radially and connects the inner cylinder 122 and the outer cylinder 124 to enhance the structural strength of the fan body 10. The rear cover 14 is located at the axial rear end of both the inner cylinder 122 and the outer cylinder 124, thus completely sealing the rear end of the motor housing 12 and preventing any airflow from passing through it, thus preventing airflow from carrying dust or other impurities or moisture into the motor cavity.

[0078] The spacing between the inner cylinder 122 and the outer cylinder 124 can be adjusted according to the required size of the fan blades 16 and the space required for the drive motor 30 located inside the inner cylinder 122. In some embodiments, the motor housing 12 may also be a single cylinder, i.e., without inner cylinder 122 and outer cylinder 124.

[0079] Figure 4 yes Figure 2 A schematic exploded view of the rotor section 34 of the axial fan 3 shown; Figure 5 yes Figure 2 A schematic exploded view of the stator section 32 of the axial fan 3 shown; Figure 6 yes Figure 3 A partially enlarged schematic diagram of part A of the axial fan 3 shown.

[0080] refer to Figure 4 As shown, in some alternative embodiments, the rotor portion 34 includes a support shaft 342, a rotor magnet 344, and a limiting piece 346.

[0081] refer to Figure 6 As shown, the support shaft 342 is arranged axially along the motor housing 12 and fixed relative to the rear cover 14. The rotor magnet 344 is fixed relative to the inner wall of the motor housing 12. The limiting piece 346 is provided at the front end of the support shaft 342 to prevent the rotor part 34 from moving axially relative to the stator part 32.

[0082] Driven by the stator 32, the rotor 34 of the drive motor 30 rotates the fan body 10 relative to the front cover 22 of the fan housing 20. The support shaft 342 of the rotor 34 can be fixed to the rear cover 14 of the fan body 10 by various methods such as bonding, plugging, or bolting. In particular, in some optional embodiments, the support shaft 342 can be integrally formed with the fan body 10, i.e., integrally formed at the center of the rear cover 14. This not only makes the connection between the support shaft 342 and the fan body 10 more secure, but also changes the traditional fan production and assembly process, eliminating the need for a fixing structure on the fan body 10 to fix the support shaft 342, and simplifying some of the installation processes involving the support shaft 342.

[0083] The various parts of the rotor section 34 may not have a direct connection relationship; that is, the various parts of the rotor section 34 may not be in direct contact with each other. For example, refer to... Figure 6 As shown, the rotor magnet 344 can be directly or indirectly fixed to the motor housing 12 of the fan body 10, and spaced apart from the support shaft 342 located at the center. Since both the support shaft 342 and the rotor magnet 344 are fixed relative to the fan body 10, their positions are also relatively fixed, that is, they rotate synchronously.

[0084] refer to Figure 4 As shown, in some alternative embodiments, the rotor portion 34 further includes a retaining sleeve 348.

[0085] refer to Figure 6 As shown, the fixed sleeve 348 has a cylindrical sleeve side plate 3482 and a sleeve bottom plate 3484 located at the axial rear end of the sleeve side plate 3482; a shaft through hole for the support shaft 342 to pass through is opened in the middle of the sleeve bottom plate 3484. The fixed sleeve 348 is disposed in the motor cavity, and the sleeve side plate 3482 is attached to the motor cover 12, and the sleeve bottom plate 3484 is attached to the rear cover 14; the rotor magnet 344 is fixed on the inner side wall of the sleeve side plate 3482.

[0086] In this embodiment, by providing a fixing sleeve 348, the support shaft 342 and rotor magnet 344 in the rotor section 34 can be pre-installed on the fixing sleeve 348 and then installed together into the motor cavity of the fan body 10. Furthermore, the entire drive motor 30 can be installed into the motor cavity of the fan body 10 after the stator section 32 is also integrally installed. Therefore, by providing the fixing sleeve 348, the axial flow fan 3 of this embodiment is more conducive to modular production.

[0087] refer to Figure 6 As shown, in some alternative embodiments, the middle of the sleeve base plate 3484 protrudes forward to form a support platform 3486, and the pivot hole is located at the center of the support platform 3486; the support platform 3486 extends backward from the pivot hole to form a fixed section 3488.

[0088] The support platform 3486 supports the stator section 32 and positions it away from the rear cover 14 of the fan body 10, thereby adjusting the position of the stator section 32. Therefore, the shape of the support platform 3486 can be adjusted according to the actual shape and structure of the drive motor 30, especially the stator section 32. The fixing section 3488 extends rearward from the shaft through-hole to increase the contact area between the fixing sleeve 348 and the supporting shaft 342, thereby better securing the supporting shaft 342.

[0089] refer to Figure 5As shown, in some alternative embodiments, the stator portion 32 includes a fixed base 322, a coil assembly 324, and at least one annular bearing 326.

[0090] refer to Figure 6 As shown, the fixed base 322 is fixedly mounted on the front cover 22. The coil assembly 324 is fixed on the fixed base 322 and is used to controllably cause the rotor portion 34 to rotate relative to the stator portion 32. The inner ring of the annular bearing 326 is sleeved on the support shaft 342, and the outer ring is mounted on the fixed base 322, thereby supporting the rotor portion 34 and the stator portion 32 and spacing the rotor portion 34 and the stator portion 32 apart.

[0091] Multiple screw holes with opposing positions can be pre-formed on the fixed base 322 and the front cover 22 to facilitate fixing the stator part 32 to the front 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 344. The coil assembly 324 typically includes two parts: a coil for generating a magnetic field after energization 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.

[0092] To enable the rotor section 34 to rotate more effectively relative to the stator section 32, the stator section 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, and is not limited here. To ensure that the axial position of the annular bearing 326 is fixed relative to the fixed base 322 and the supporting shaft 342, the number of annular bearings 326 can be as follows: Figure 6 Two ring bearings are shown, spaced apart axially. The rear and inner ring of the annular bearing 326 located on the rear side are supported by a support platform 3486, while the front and outer ring are supported by a fixed base 322 forming a support groove. The rear and outer ring of the annular bearing 326 located on the front side are supported by a fixed base 322 forming a support groove, while the front and inner ring are limited by a limiting piece 346. During the assembly of the axial fan 3, a fixed sleeve 348, two annular bearings 326, and a limiting piece 346 are sequentially fitted onto the support shaft 342 from back to front. The fixed base 322 is supported by the two annular bearings 326. Therefore, the rotor 34 rotatably limits the stator 32 between the fixed sleeve 348 and the limiting piece 346 of the rotor 34.

[0093] 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.

[0094] 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.

[0095] refer to Figure 5 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 front cover 22 to make full use of the space formed by the need to form screw holes and other structures at the front end of the fixing base 322 for fixing to the front cover 22.

[0096] Figure 7 yes Figure 2 A schematic diagram of the mating part 36 of the axial fan 3 shown.

[0097] refer to Figure 6 and Figure 7 As shown, in some alternative embodiments, the drive motor 30 further includes a mating portion 36. The mating portion 36 includes two gaskets 362 and / or damping plates 364.

[0098] Two gaskets 362 are respectively fitted onto the support shaft 342; one gasket 362 is located between the limiting piece 346 and the stator part 32, and the other gasket 362 is located between the rear cover 14 and the stator part 32.

[0099] The damping plate 364 is fitted on the support shaft 342; the damping plate 364 is located between the limiting plate 346 and the stator 32, and provides an elastic force to push the stator 32 away from the limiting plate 346.

[0100] In some alternative implementations, the axial fan 3 also includes a fan housing 20.

[0101] refer to Figure 3 As shown, the fan housing 20 is located on the front 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 front and rear of the fan blades 16, and a front cover 22 at a position directly opposite to the front and rear of the motor housing 12.

[0102] Furthermore, in some alternative embodiments, the fan housing 20 is recessed rearward to form a fixing groove 26 at a position directly opposite the front and rear of the motor housing 12, and the front cover 22 is located at the rear end of the fixing groove 26. The axial fan 3 also includes a decorative cover 40. The decorative cover 40 is detachably disposed at the front end of the fixing groove 26 to cover the fixing groove 26.

[0103] In this embodiment, the fan housing 20, by forming a fixing groove 26 and providing a decorative cover 40, can cover the front 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.

[0104] Figure 8 yes Figure 3 A partially enlarged schematic diagram of part B of the axial fan 3 shown.

[0105] refer to Figure 8 As shown, in some optional embodiments, the rear end diameter of the fixing groove 26 is larger than the diameter of the inner cylinder 122 and smaller than the diameter of the outer cylinder 124. Furthermore, the fan housing 20 extends rearward from the outside of the fixing groove 26 to form a blocking portion 28, the rear end diameter of which is larger than the diameter of the outer cylinder 124, and a rearwardly opening insertion cavity is formed between the fixing groove 26 and the blocking portion 28. The front end of the outer cylinder 124 extends into the insertion cavity.

[0106] In order to better protect the motor cavity and prevent dust or other foreign objects from entering with the airflow, the axial fan 3 of this embodiment makes full use of the outer cylinder 124 formed by the fan body 10, and a shielding part 28 is formed on the fan cover 20 to define the insertion cavity together with the fixing groove 26. By extending the front end of the outer cylinder 124 into the insertion cavity, it is more difficult for the airflow to enter the motor cavity.

[0107] refer to Figure 1 As shown, the present invention also provides a dehumidifier 1. The dehumidifier 1 includes a main body 2 and an axial fan 3. The main body 2 has an air inlet and an air outlet. The axial fan 3 is disposed on the main body 2 and is used to promote the formation of an airflow that enters the main body 2 from the air inlet and is blown out from the air outlet; the axial fan 3 is any of the axial fan 3 described above.

[0108] Although the axial fan 3 of the present invention is mainly used in dehumidifier 1, it is understood that the axial fan 3 of the present invention can also be used in other household appliances and even other electrical appliances besides dehumidifier 1.

[0109] Therefore, those skilled in the art should recognize that although numerous 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 invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. An axial flow fan, comprising: A fan body, the middle portion of which defines a motor cavity having an opening toward the axial front end; A front cover is provided on the front side of the fan body and is used to cover the opening of the motor cavity; as well as A drive motor is disposed within the motor cavity; the drive motor includes a stator portion fixed relative to the front cover and a rotor portion fixed relative to the fan body; the drive motor is configured to cause the rotor portion to rotate relative to the stator portion, thereby driving the fan body to rotate relative to the front cover.

2. The axial flow fan according to claim 1, wherein the fan body comprises: The motor housing has an outer and inner wall that are cylindrical in shape; The rear cover is disposed at the axial rear end of the motor housing and together with the motor housing defines the motor cavity; as well as Multiple fan blades are disposed on the outer periphery of the motor housing.

3. The axial flow fan according to claim 2, wherein the motor housing comprises: The inner cylinder and the outer cylinder are respectively cylindrical, with the diameter of the inner cylinder being smaller than the diameter of the outer cylinder and located in the middle of the outer cylinder; as well as Multiple reinforcing ribs are formed extending radially between the outer cylinder and the inner cylinder; The rear cover is located at the axial rear end of both the inner cylinder and the outer cylinder, and together with the inner cylinder, defines the motor cavity.

4. The axial flow fan according to claim 2, wherein the rotor portion comprises: A support shaft is provided along the axial direction of the motor housing and fixed relative to the rear cover; The rotor magnet is fixedly disposed relative to the inner wall of the motor housing; as well as A limiting piece is disposed at the front end of the supporting shaft to prevent the rotor from moving axially relative to the stator.

5. The axial fan according to claim 4, wherein the rotor portion further comprises: A fixed sleeve has a cylindrical sleeve side plate and a sleeve bottom plate located at the axial rear end of the sleeve side plate; the sleeve bottom plate has a through hole in the middle for the support shaft to pass through. The fixing sleeve is disposed inside the motor cavity, and the sleeve side plate is in contact with the motor cover, and the sleeve bottom plate is in contact with the rear cover; the rotor magnet is fixed on the inner side wall of the sleeve side plate.

6. The axial fan according to claim 5, wherein... The middle part of the sleeve base plate protrudes forward to form a support platform, and the pivot hole is located at the center of the support platform; the support platform extends backward from the pivot hole to form a fixed section.

7. The axial flow fan according to claim 4, wherein the stator comprises: A fixed base is fixedly mounted on the front cover; A coil assembly, fixed on the fixed base, is used to controllably cause the rotor portion to rotate relative to the stator portion; as well as 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 portion and the stator portion and spacing the rotor portion and the stator portion apart.

8. The axial flow fan according to claim 7, wherein the stator further comprises: The computer board is fixed on the fixed base and electrically connected to the coil assembly.

9. The axial fan according to claim 4, wherein the drive motor further comprises: 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 rear 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.

10. The axial fan according to claim 3, further comprising: A fan housing is disposed on the front side of the fan body; The fan housing has a ventilation grille for airflow at a position directly opposite the front and rear of the fan blades, and a front cover at a position directly opposite the front and rear of the motor housing.

11. The axial fan according to claim 10, wherein The fan housing is recessed rearward at a position directly opposite the front and rear of the motor housing to form a fixing groove, and the front cover is located at the rear end of the fixing groove. The axial fan also includes: A decorative cover is detachably mounted on the front end of the fixing groove to cover the fixing groove.

12. The axial fan according to claim 11, wherein The rear end diameter of the fixed groove is larger than the inner cylinder diameter and smaller than the outer cylinder diameter; and The fan housing also extends rearward from the outside of the fixing groove to form a shielding part. The rear diameter of the shielding part is larger than the diameter of the outer cylinder, and an insertion cavity with a rearward opening is formed between the fixing groove and the shielding part. The front end of the outer cylinder extends into the insertion cavity.

13. A dehumidifier, comprising: The main body is provided with an air inlet and an air outlet; An axial fan is disposed on the main body and is used to induce an airflow that enters the main body from the air inlet and exits from the air outlet; the axial fan is an axial fan according to any one of claims 1 to 12.

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