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, 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, and a shell structure, a motor support and other structures of the driving motor are omitted, so that the size of the axial flow fan is smaller.

Description

Technical Field

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

[0002] Air humidity significantly impacts living comfort. In southern China and some coastal cities, residents often require specialized dehumidification equipment to regulate indoor humidity. Compared to air conditioners with built-in dehumidification functions, household dehumidifiers offer significant advantages in terms of dehumidification efficiency, energy consumption, and noise. They also offer more precise humidity control and minimize impact on ambient temperature. Therefore, families with dehumidification needs often purchase dedicated household dehumidifiers.

[0003] Existing household dehumidifiers generally have axial fans for air exchange, and the drive motor of the axial fan itself has a casing. When this drive motor is installed on the fan body, it takes up more axial space and requires additional motor brackets and other structures for fixing. As a result, the axial fan is larger in size and occupies more installation space, which is not conducive to the miniaturization of household dehumidifiers. Utility Model Content

[0004] One aspect of the present invention is to provide an axial flow fan with a smaller volume.

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

[0006] According to one aspect of the present invention, the present invention provides an axial flow fan, which includes a fan body, a front cover, and a drive motor.

[0007] A motor cavity is defined in the middle of the fan body and has an opening toward the axial front end.

[0008] The front cover is arranged at the front side of the fan body and is used to shield the opening of the motor cavity.

[0009] The drive motor is arranged in 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 to drive the fan body to rotate relative to the front cover.

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

[0011] The motor cover tube has an outer side wall and an inner side wall in a cylindrical shape.

[0012] The rear cover is arranged at the axial rear end of the motor cover cylinder and defines a motor cavity together with the motor cover cylinder.

[0013] A plurality of fan blades are arranged on the peripheral side of the outer wall of the motor cover.

[0014] Optionally, the motor cover includes an inner cylinder and an outer cylinder, each of which is cylindrical, wherein the diameter of the inner cylinder is smaller than that of the outer cylinder and is arranged 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 ends of both the inner cylinder and the outer cylinder, and defines a motor cavity together with the inner cylinder.

[0016] Optionally, the rotor portion includes: a supporting shaft, a rotor magnet and a limiting piece.

[0017] The supporting rotating shaft is arranged along the axial direction of the motor cover cylinder and is fixed relative to the rear cover.

[0018] The rotor magnet is fixedly arranged relative to the inner side wall of the motor cover.

[0019] The limiting piece is arranged at the front end of the supporting shaft and is used to prevent the rotor part from moving axially relative to the stator part.

[0020] Optionally, the rotor part further includes: a fixing sleeve.

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

[0022] The fixed sleeve is arranged in 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.

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

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

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

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

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

[0028] Optionally, the stator part further includes: a computer board.

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

[0030] Optionally, the driving motor further includes: a mating portion.

[0031] The matching portion includes: two gaskets and / or shock-absorbing plates.

[0032] The two gaskets are respectively sleeved on the supporting shafts; one gasket is located between the limiting plate and the stator part, and the other gasket is located between the rear cover and the stator part.

[0033] The shock-absorbing plate is sleeved on the supporting shaft; the shock-absorbing plate is located between the limiting plate and the stator part, and provides elastic force to urge the stator part away from the limiting plate.

[0034] Optionally, the axial flow fan further includes: a fan cover.

[0035] The fan cover is arranged on the front side of the fan body.

[0036] The fan housing is formed with a ventilation grid for airflow to pass through at a position facing the front and rear of the fan blades, and a front cover is formed at a position facing the front and rear of the motor cover cylinder.

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

[0038] The axial-flow fan further includes a decorative cover.

[0039] The decorative cover is detachably arranged at the front end of the fixing groove portion to cover the fixing groove portion.

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

[0041] The fan cover also extends backward from the outer side of the fixed groove to form a shielding portion, the rear end diameter of the shielding portion is larger than the diameter of the outer cylinder, and an insertion cavity with a rearward opening is formed between the fixed groove and the shielding portion.

[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 flow fan.

[0044] An air inlet and an air outlet are provided on the main body.

[0045] The axial flow fan is arranged on the main body and is used to promote the formation of an air flow that enters the main body from the air inlet and blows out from the air outlet; the axial flow fan is any of the above-mentioned axial flow fans.

[0046] The axial flow fan of the present invention defines a motor cavity in the middle part of the fan body, and a front cover is arranged on the front side of the fan body to shield 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 motor cavity defined by the fan body and the front cover shielding the opening of the motor cavity are used to protect the drive motor, and the outer shell structure and motor bracket structure of the drive motor itself are omitted, thereby making the axial flow fan smaller in size.

[0047] Based on the following detailed description of some specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

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

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

[0051] Figure 3 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 portion of the axial flow fan is shown;

[0053] Figure 5 yes Figure 2 A schematic exploded view of a stator portion of an axial flow fan is shown;

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

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

[0056] Figure 8 yes Figure 3 A partial enlarged schematic diagram of part B of the axial flow fan shown. DETAILED DESCRIPTION

[0057] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] The terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, the term "first," "second," etc., may explicitly or implicitly include at least one of the features, or one or more of the features.

[0059] In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically limited. 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 other features may be further included.

[0060] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," "coupled," and the like should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0061] Furthermore, in the description of the present invention, a first feature being “above” or “below” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0062] That is, in the description of the present utility model, "above," "above," and "above" a first feature of a second feature include the first feature being directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "below," "below," or "below" a first feature of a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, devices, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, devices, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] Unless otherwise defined, all terms (including technical terms and scientific terms) used in the description of the embodiments of the present invention have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0065] Figure 1 is a schematic diagram of a dehumidifier 1 according to an embodiment of the present utility model; Figure 2 is a schematic exploded view of an axial flow fan 3 according to an embodiment of the present invention; Figure 3 is a schematic cross-sectional view of an axial flow 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 central portion of the fan body 10 defines a motor cavity with an opening toward the axial front end. A front cover 22 is disposed on the front side of the fan body 10 and serves to shield the motor cavity opening. 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 rotate the rotor portion 34 relative to the stator portion 32, thereby driving the fan body 10 to rotate relative to the front cover 22.

[0068] The drive motor 30 of the existing axial flow fan 3 needs to have the stator portion 32 and the rotor portion 34 disposed in a closed housing. Only the shaft of the rotor portion 34 extends outside the housing. Therefore, the portion of the shaft extending out of the housing and the portion of the internal space that cannot be fully utilized due to the housing encapsulation make the axial size of the drive motor 30 larger. Moreover, in order to be fixed to the housing of the drive motor 30, the axial flow fan 3 also needs to be provided with a motor bracket or other mounting and fixing structure at the installation position of the drive motor 30, further resulting in an increase in the axial and radial dimensions of the axial flow fan 3. In order to be fixed to the shaft extending outside the housing, the fan body 10 also needs to be provided with a mounting hole of a certain length in the axial direction, which also results in an increase in the axial size of the axial flow fan 3. The above problems are superimposed, resulting in an increase in the volume of the axial flow fan 3, which occupies more installation space, and is not conducive to the miniaturization of the household dehumidifier 1.

[0069] refer to Figure 2 and Figure 3 As shown, the axial flow fan 3 of this embodiment defines a motor cavity in the middle of the fan body 10, and a front cover 22 is disposed on the front side of the fan body 10 to shield the opening of the motor cavity. By fixing the stator portion 32 of the drive motor 30 relative to the front cover 22 and the rotor portion 34 relative to the fan body 10, the drive motor 30 eliminates the need for a housing structure, and accordingly, the increase in the axial and radial dimensions of the axial flow fan 3 caused by the provision of the housing structure is eliminated. Therefore, the axial flow fan 3 of this embodiment is smaller than the existing axial flow fan 3 when the fan body 10 has the same specifications. In addition, because the axial flow fan 3 of this embodiment eliminates the housing structure of the drive motor 30 compared to the existing axial flow fan 3, the material cost of processing the housing is saved and the assembly process is simplified. The process of first encapsulating the stator portion 32 and the rotor portion 34 in the housing and then installing the drive motor 30 is simplified to directly installing the stator portion 32 and the rotor portion 34.

[0070] In this embodiment, a certain structure is fixed relative to another structure. For example, the stator portion 32 is fixed relative to the front cover 22. This includes both direct contact and fixation between the stator portion 32 and the front cover 22, and also includes the presence of a third structure between the stator portion 32 and the front cover 22 to separate the two, and the stator portion 32 and the front cover 22 are respectively directly contacted and fixed with the third structure.

[0071] The stator portion 32 of this embodiment 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 in other words, the stator portion 32 is fixed to the front cover 22 .

[0072] The drive motor 30 of this embodiment is arranged in the motor cavity, and is protected by the fan body 10 on the circumferential side and the axial rear side, and by the front cover 22 on the front side. 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 protecting the drive motor 30, and 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 ends of the axial direction indicated in the embodiment are both located on the straight line where the rotation axis of the fan body 10 is located. The front and rear directions are only a relative position relationship and have no direct relationship with the shape, installation position and direction of the axial flow fan 3 itself. For example, the axial front of the fan body 10 can be as follows Figure 1 The figure corresponds to the upper portion of the dehumidifier 1, which is provided with the axial flow fan 3. The stator portion 32 and the rotor portion 34 of the drive motor 30 are both disposed within the motor cavity defined by the fan body 10. Therefore, the axial front-to-back direction of the stator portion 32 and the rotor portion 34 of the drive motor 30 is consistent with that of the fan body 10, while the front-to-back direction of the other parts of the axial flow fan 3 is adapted to that of the fan body 10 or the stator portion 32 and the rotor portion 34 of the drive motor 30.

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

[0075] The motor housing 12 has a cylindrical outer wall and an inner wall. The rear cover 14 is arranged at the axial rear end of the motor housing 12 and defines a motor cavity together with the motor housing 12. A plurality of fan blades 16 are arranged around the outer wall 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, each of which is cylindrical. The inner cylinder 122 has a smaller diameter than the outer cylinder 124 and is located in the middle of the outer cylinder 124. The motor housing 12 also includes a plurality of reinforcing ribs 126 extending radially between the outer cylinder 124 and the inner cylinder 122. The rear cover 14 is located at the axial rear ends of both the inner cylinder 122 and the outer cylinder 124, and together with the inner cylinder 122, defines a motor cavity.

[0077] refer to Figure 3 As shown, the motor housing 12 of this embodiment is composed of an inner cylinder 122 and an outer cylinder 124. The axes of the inner cylinder 122 and the outer cylinder 124 coincide with each other. The inner side wall of the inner cylinder 122 serves as the inner side wall of the motor housing 12 and defines the motor cavity together with the front side of the rear cover 14, while the outer side wall of the outer cylinder 124 serves as the outer side wall of the motor housing 12. The fan blades 16 are shown in FIG. Figure 2 As shown, the ribs 126 are evenly distributed along the circumferential direction on the outer wall of the outer cylinder 124. Multiple reinforcing ribs 126 are evenly distributed along the circumference between the outer cylinder 124 and the inner cylinder 122. Each rib 126 extends radially and connects the inner and outer cylinders 122, 124, thereby enhancing the structural strength of the fan body 10. The rear cover 14 is located at the axial rear ends of both the inner and outer cylinders 122, 124, thereby completely sealing the rear end of the motor housing 12 and preventing any airflow from flowing through this area, thereby preventing the airflow from carrying impurities such as dust or moisture into the motor cavity.

[0078] The width of the gap 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 disposed in the inner cylinder 122. In some embodiments, the motor housing 12 can also be just a cylinder, that is, without the inner cylinder 122 and the outer cylinder 124.

[0079] Figure 4 yes Figure 2 A schematic exploded view of the rotor portion 34 of the axial flow fan 3 is shown; Figure 5 yes Figure 2 A schematic exploded view of the stator portion 32 of the axial flow fan 3 is shown; Figure 6 yes Figure 3 FIG. 1 is a partial enlarged schematic diagram of portion A of the axial flow fan 3 .

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

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

[0082] Driven by the stator portion 32, the rotor portion 34 of the drive motor 30 drives the fan body 10 to rotate relative to the front cover 22 of the fan housing 20. The support shaft 342 of the rotor portion 34 can be fixed to the rear cover 14 of the fan body 10 in various ways such as bonding, plugging, and bolting. In particular, in some optional embodiments, the support shaft 342 can also be integrally formed with the fan body 10, that is, 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, eliminates the need for a fixing structure on the fan body 10 for fixing the support shaft 342, and simplifies a portion of the installation process involving the support shaft 342.

[0083] There may not be a direct connection between the various parts of the rotor portion 34, that is, the various parts of the rotor portion 34 may not directly contact each other. 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 is spaced apart from the centrally located support shaft 342. Because the support shaft 342 and the rotor magnet 344 are both 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 optional embodiments, the rotor portion 34 further includes a fixing sleeve 348 .

[0085] refer to Figure 6 As shown, the fixed sleeve 348 comprises 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 is defined in the center of the sleeve bottom plate 3484 for the support shaft 342 to pass through. The fixed sleeve 348 is disposed within the motor cavity, with the sleeve side plate 3482 abutting against the motor housing 12 and the sleeve bottom plate 3484 abutting against the rear cover 14. The rotor magnet 344 is fixed to the inner sidewall of the sleeve side plate 3482.

[0086] By providing the fixing sleeve 348 in this embodiment, the support shaft 342 and the rotor magnet 344 in the rotor portion 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 portion 32 is also integrally installed. Therefore, by providing the fixing sleeve 348, the axial flow fan 3 in this embodiment is more conducive to modular production.

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

[0088] The support platform 3486 is used to support the stator portion 32 and keep it away from the rear cover 14 of the fan body 10 to adjust the position of the stator portion 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 portion 32. The fixing section 3488 extends rearward from the shaft through hole to increase the contact area between the fixing sleeve 348 and the support shaft 342, thereby better securing the support shaft 342.

[0089] refer to Figure 5As shown, in some optional 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 to 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 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] The fixed base 322 and the front cover 22 may be pre-formed with a plurality of screw holes positioned opposite each other, facilitating the use of screws to secure the stator portion 32 to the front cover 22. The coil assembly 324 is fixed to the outer surface of the fixed base 322 in an axially removable but non-rotatable manner. After the stator portion 32 is mounted relative to the rotor portion 34, the outer end of the coil assembly 324 faces the inner surface of the rotor magnet 344. The coil assembly 324 typically comprises a coil for generating a magnetic field upon application of power and an iron core for securing the coil. The shape of the iron core, as well as the number and position of the coils, can be configured according to actual needs.

[0092] In order to make the rotor part 34 rotate better relative to the stator part 32, the stator part 32 of this embodiment further includes at least one annular bearing 326. The annular bearing 326 can be a ball bearing or other existing bearing types, which are not limited here. In order to make the annular bearing 326 fixed in the axial direction relative to the fixed base 322 and the support shaft 342, the number of annular bearings 326 can be as follows: Figure 6 As shown, there are two of them, spaced apart in the axial direction. The rear side and inner ring of the annular bearing 326 located on the axial rear side are supported by the support platform 3486, while the front side and outer ring are supported by the fixed base 322 forming a supporting groove. The rear side and outer ring of the annular bearing 326 located on the axial front side are supported by the fixed base 322 forming a supporting groove, while the front side and inner ring are restrained by the limiting plate 346. During the assembly process of the axial flow fan 3, the support shaft 342 is sequentially sleeved with the fixing sleeve 348, the two annular bearings 326, and the limiting plate 346 from back to front. The fixing base 322 is supported by the two annular bearings 326, so that the rotor portion 34 can rotatably restrain the stator portion 32 between the fixing sleeve 348 and the limiting plate 346 of the rotor portion 34.

[0093] The axial flow fan 3 of this embodiment is configured as described above, so that the stator portion 32 and the rotor portion 34 are relatively fixed in the axial direction without providing a housing for the driving motor 30 itself.

[0094] In some optional embodiments, the stator portion 32 further includes a computer board 328 . The computer board 328 is fixed to the fixed base 322 and electrically connected to the coil assembly 324 .

[0095] refer to Figure 5 and Figure 6 As shown, because the drive motor 30 of this embodiment does not have a housing, the computer board 328 for controlling the drive motor 30 can be directly fixed to the fixed base 322. The computer board 328 can be placed between the coil assembly 324 and the front cover 22 to fully utilize the space formed by the screw holes and other structures formed at the front end of the fixed base 322 for fixing to the front cover 22.

[0096] Figure 7 yes Figure 2 Schematic diagram of the matching portion 36 of the axial flow fan 3 is shown.

[0097] refer to Figure 6 and Figure 7 As shown, in some optional embodiments, the driving motor 30 further includes a matching portion 36 . The matching portion 36 includes two washers 362 and / or a shock-absorbing sheet 364 .

[0098] The two gaskets 362 are respectively sleeved on the supporting shaft 342 ; one gasket 362 is located between the limiting piece 346 and the stator portion 32 , and the other gasket 362 is located between the rear cover 14 and the stator portion 32 .

[0099] The shock absorbing plate 364 is sleeved on the supporting shaft 342 ; the shock absorbing plate 364 is located between the limiting plate 346 and the stator portion 32 , and provides elastic force to urge the stator portion 32 away from the limiting plate 346 .

[0100] In some optional embodiments, the axial flow fan 3 further includes a fan cover 20 .

[0101] refer to Figure 3 As shown, the fan housing 20 is arranged on the front side of the fan body 10. The fan housing 20 is formed with a ventilation grille 24 for airflow to pass through at a position facing the front and rear of the fan blades 16, and a front cover 22 is formed at a position facing the front and rear of the motor cover 12.

[0102] Furthermore, in some optional embodiments, the fan housing 20 is recessed rearwardly at a position directly opposite the front and rear ends of the motor housing 12 to form a fixed groove 26, and the front cover 22 is located at the rear end of the fixed groove 26. The axial fan 3 also includes a decorative cover 40. The decorative cover 40 is removably mounted at the front end of the fixed groove 26 to shield the fixed groove 26.

[0103] The fan housing 20 of this embodiment, by forming a fixing slot 26 and providing a decorative cover 40, can shield the front cover 22 having the screw holes, thereby enhancing the appearance of the axial flow fan 3. The decorative cover 40 can be a display panel for displaying information and facilitating manual control by the user. The display panel can be located within the fixing slot 26.

[0104] Figure 8 yes Figure 3 FIG. 1 is a partial enlarged schematic diagram of portion B of the axial flow fan 3 .

[0105] refer to Figure 8 As shown, in some optional embodiments, the rear end diameter of the fixing groove portion 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 further extends rearward from the outer side of the fixing groove portion 26 to form a shielding portion 28. The rear end diameter of the shielding portion 28 is larger than the diameter of the outer cylinder 124, and an insertion cavity with a rearward opening is formed between the fixing groove portion 26 and the shielding portion 28. The front end of the outer cylinder 124 extends into the insertion cavity.

[0106] To better protect the motor cavity from dust and other foreign matter entering with the airflow, the axial-flow fan 3 of this embodiment utilizes the outer cylinder 124 formed on the fan body 10. A shielding portion 28 is formed on the fan housing 20 to define an insertion cavity together with the fixing groove 26. By extending the front end of the outer cylinder 124 into the insertion cavity, airflow is further restricted from entering 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 flow fan 3. The main body 2 is provided with an air inlet and an air outlet. The axial flow fan 3 is disposed on the main body 2 and is used to form an air flow that enters the main body 2 through the air inlet and is blown out through the air outlet. The axial flow fan 3 can be any of the axial flow fans 3 described above.

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

[0109] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention can be directly determined or deduced from the contents disclosed herein without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. An axial flow fan, characterized in that include: a fan body, wherein a middle portion of the fan body defines a motor cavity having an opening toward an axial front end; a front cover, disposed on the front side of the fan body and used to cover the opening of the motor cavity; as well as A drive motor is disposed in 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, characterized in that The fan body comprises: The motor cover has an outer wall and an inner wall in the shape of a cylindrical tube; a rear cover, which is arranged at the axial rear end of the motor cover and defines the motor cavity together with the motor cover; and A plurality of fan blades are arranged on the peripheral side of the outer wall of the motor cover.

3. The axial flow fan according to claim 2, characterized in that The motor cover comprises: An inner cylinder and an outer cylinder, each of which is cylindrical, wherein the inner cylinder has a smaller diameter than the outer cylinder and is disposed in the middle of the outer cylinder; and a plurality of reinforcing ribs extending radially between the outer cylinder and the inner cylinder; The rear cover is located at the axial rear ends of the inner cylinder and the outer cylinder, and defines the motor cavity together with the inner cylinder.

4. The axial flow fan according to claim 2, characterized in that The rotor portion includes: A supporting shaft is arranged along the axial direction of the motor cover and fixed relative to the rear cover; A rotor magnet is fixedly disposed relative to the inner wall of the motor housing; and A limiting piece is provided at the front end of the supporting shaft and is used to prevent the rotor part from moving axially relative to the stator part.

5. The axial flow fan according to claim 4, characterized in that The rotor portion further includes: A fixed sleeve, the fixed sleeve comprising 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 for the support shaft to pass through is formed in the middle of the sleeve bottom plate; The fixed sleeve is arranged in 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 flow fan according to claim 5, characterized in that The middle portion of the sleeve bottom plate protrudes forward to form a supporting platform, and the rotating shaft through hole is located at the center of the supporting platform; the supporting platform extends backward from the rotating shaft through hole to form a fixed section.

7. The axial flow fan according to claim 4, characterized in that The stator portion comprises: A fixed base, fixedly arranged on the front cover; a coil assembly fixed to the fixed base, for causing the rotor portion to rotate relative to the stator portion in a controlled manner; 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 arranged on the fixed base, thereby supporting the rotor part and the stator part and spacing the rotor part from the stator part.

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

9. The axial flow fan according to claim 4, characterized in that The drive motor further comprises: A matching portion, the matching portion comprising: Two gaskets, respectively sleeved on the supporting shaft; one gasket is located between the limiting plate and the stator part, and the other gasket is located between the rear cover and the stator part; and / or A shock-absorbing plate is sleeved on the supporting shaft; the shock-absorbing plate is located between the limiting plate and the stator part, and provides an elastic force to urge the stator part away from the limiting plate.

10. The axial flow fan according to claim 3, characterized in that Also includes: A fan cover is arranged on the front side of the fan body; The fan housing is formed with a ventilation grille for airflow at a position facing the front and rear of the fan blades, and the front cover is formed at a position facing the front and rear of the motor cover.

11. The axial flow fan according to claim 10, wherein: The fan housing is recessed at a position facing the front and rear of the motor housing to form a fixed groove, and the front cover is located at the rear end of the fixed groove. The axial flow fan further includes: The decorative cover is detachably arranged at the front end of the fixing groove portion to cover the fixing groove portion.

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

13. A dehumidifier, characterized in that include: A main body, wherein the main body is provided with an air inlet and an air outlet; An axial flow fan is provided on the main body and is used to promote the formation of an air flow entering the main body from the air inlet and blowing out from the air outlet; the axial flow fan is an axial flow fan according to any one of claims 1 to 12.

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