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 housing, a fan body and a driving motor. The middle of the fan housing is sunken downwards to form a fixing groove part, and the fan housing forms a ventilation fence part for airflow to pass through on the outer side of the fixing groove part. The fan body is arranged below the fan housing and used for promoting formation of air flow which flows in the vertical direction and penetrates through the ventilation fence part. The driving motor is fixed below the fixing groove part and used for driving the fan body to rotate. The driving motor comprises a motor control board. The motor control board is arranged close to the fixing groove part, and a wiring terminal is arranged on the surface, facing the fixing groove part, of the motor control board. A wiring hole is formed in the bottom face, right facing the wiring terminal, of the fixing groove part, and a waterproof step protruding upwards is formed on the peripheral side of the wiring hole. By arranging the waterproof step, the axial flow fan can prevent water entering the fixing groove part from penetrating through the wiring hole and making contact with the driving motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of home appliances, in particular to an axial flow fan and a dehumidifier with the same. BACKGROUND

[0002] Air humidity has a significant impact on the comfort of living environment. In southern regions and some coastal cities, residents often need special dehumidification equipment to adjust indoor air humidity. Compared with air conditioners with built-in dehumidification function, household dehumidifiers have obvious advantages in dehumidification efficiency, energy consumption, noise, etc. At the same time, they can more accurately control humidity and have less impact on environmental temperature. Therefore, households with dehumidification needs usually purchase special household dehumidifiers.

[0003] The dehumidifier itself is provided with a water tank to collect condensed water, so the user may accidentally spill water when taking the water tank. The fan of the dehumidifier is usually arranged close to the air inlet or air outlet, so when water is spilled on the dehumidifier, there is a risk of entering the motor cavity of the fan and damaging the motor. SUMMARY

[0004] An aspect of the utility model is to provide an axial flow fan with a waterproof structure.

[0005] A further aspect of the utility model is to improve the waterproof and drainage functions of the axial flow fan.

[0006] Another aspect of the utility model is to provide a dehumidifier that solves the above problems.

[0007] According to an aspect of the utility model, the utility model provides an axial flow fan, which comprises a fan housing, a fan body and a drive motor.

[0008] The middle part of the fan housing is recessed downward to form a fixing groove, and the fan housing forms a ventilation grid on the outside of the fixing groove for airflow to pass through.

[0009] The fan body is arranged below the fan housing and is used to promote airflow flowing in the up-down direction and passing through the ventilation grid.

[0010] The drive motor is fixed below the fixing groove and is used to drive the fan body to rotate.

[0011] The drive motor comprises a motor control board.

[0012] The motor control board is arranged close to the fixing groove and is provided with a terminal on the surface facing the fixing groove.

[0013] The fixing groove is provided with a terminal hole on the bottom surface opposite the terminal, and a waterproof step is formed on the periphery of the terminal hole.

[0014] Optionally, a part of the bottom surface of the fixed groove portion is concave downward to form a drainage groove, and the wiring hole is formed on the bottom surface of the drainage groove; the fixed groove portion is further provided with a first drainage hole on the bottom surface of the drainage groove, and the first drainage hole is located on the side of the wiring hole away from the center of the bottom surface of the fixed groove portion.

[0015] Optionally, the fan body comprises a motor cover cylinder and a fan bottom cover.

[0016] The motor cover cylinder has an inner cylinder body in the shape of a cylindrical tube.

[0017] The fan bottom cover is arranged at the lower end of the inner cylinder body and cooperates with the inner cylinder body to define a motor cavity opening downward and facing the bottom surface of the fixed groove portion and used for accommodating the driving motor.

[0018] The distance between the first drainage hole and the axis of the fan body is greater than the diameter of the inner cylinder body.

[0019] Optionally, the motor cover cylinder further has an outer cylinder body in the shape of a cylindrical tube and having a diameter greater than that of the inner cylinder body.

[0020] The fan body further comprises a plurality of fan blades.

[0021] The plurality of fan blades are arranged on the circumferential side of the outer cylinder body.

[0022] The fan cover further extends downward from the outside of the fixed groove portion to form a shielding portion, and an insertion cavity opening downward is formed between the side wall of the fixed groove portion and the shielding portion.

[0023] The diameter of the outer cylinder body is greater than that of the side wall of the fixed groove portion and smaller than that of the shielding portion, and the upper end of the outer cylinder body is not lower than the lower end of the shielding portion.

[0024] Optionally, the motor cover cylinder further has a plurality of reinforcing ribs extending radially between the outer cylinder body and the inner cylinder body; and / or the fan bottom cover is further arranged at the lower end of the outer cylinder body, and one or more second drainage holes are formed in the fan bottom cover between the inner cylinder body and the outer cylinder body.

[0025] Optionally, the axial flow fan further comprises a display panel.

[0026] The display panel is detachably arranged at the upper opening of the fixed groove portion.

[0027] Optionally, the display panel extends downward to a plurality of lower end axially outward protruding claws.

[0028] A plurality of clamping holes are formed in the side wall of the fixed groove portion, each clamping hole corresponding to one claw, so that each claw is clamped into one clamping hole.

[0029] Optionally, each clamping hole extends downward to the bottom surface of the fixed groove portion.

[0030] Optionally, a plurality of screw holes are further formed on the bottom surface of the fixing groove portion, so that the driving motor is fixed to the fixing groove portion by screws passing through the screw holes.

[0031] The fixing groove portion forms a first protrusion protruding upward around each screw hole.

[0032] Optionally, a plurality of positioning claws protruding upward are formed on the side of the driving motor close to the fixing groove portion.

[0033] The bottom surface of the fixing groove portion is recessed upward to form a plurality of positioning holes, each of which corresponds to one of the positioning claws, so that each positioning claw is clamped into one of the positioning holes.

[0034] Optionally, each positioning hole penetrates the bottom surface of the fixing groove portion upward and downward, and the fixing groove portion forms a second protrusion protruding upward around each positioning hole.

[0035] According to another aspect of the present application, the present application provides a dehumidifier.

[0036] The sidewall of the casing is provided with an air inlet, and the top wall of the casing is provided with an air outlet.

[0037] The axial flow fan is arranged at the air outlet and is used to form an air flow entering the casing from the air inlet and blowing out from the air outlet.

[0038] The axial flow fan of the present application forms a fixing groove portion in the middle of the fan housing and forms a ventilation grid portion outside the fixing groove portion for air flow. The fan body is arranged below the fan housing and is used to form an air flow flowing in the up-down direction and passing through the ventilation grid portion. The driving motor is fixed below the fixing groove portion and is used to drive the fan body to rotate. The motor control board is arranged close to the fixing groove portion and is provided with a terminal on the surface facing the fixing groove portion. The fixing groove portion is provided with a terminal hole on the bottom surface facing the terminal, and a waterproof step protruding upward is formed around the terminal hole. By arranging the waterproof step, the axial flow fan can prevent water entering the fixing groove portion from passing through the terminal hole and contacting the driving motor.

[0039] Further, the axial flow fan of the present application further forms other waterproof and drainage structures including a drainage groove, a first drainage hole, a second drainage hole, a first protrusion, a second protrusion, and a shielding portion, so as to improve the waterproof and drainage functions of the axial flow fan.

[0040] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, when considered in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0041] Some specific embodiments of the present application will be described in detail below with reference to the drawings, which are by way of illustration and not limitation. Like or similar components or parts are designated with the same reference numerals throughout the drawings. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0042] Figure 1 is a schematic diagram of a dehumidifier according to an embodiment of the present application;

[0043] Figure 2 is Figure 1 is a schematic plan view of the inside of the dehumidifier shown in

[0044] Figure 3 is Figure 1 is a schematic exploded view of the axial flow fan of the dehumidifier shown in

[0045] Figure 4 is Figure 1 is a schematic cross-sectional view of the axial flow fan of the dehumidifier shown in

[0046] Figure 5 is Figure 3 is a schematic diagram of the fan body of the axial flow fan shown in

[0047] Figure 6 is Figure 3 is a schematic diagram of the drive motor of the axial flow fan shown in

[0048] Figure 7 is Figure 6 is a schematic exploded view of the rotor portion of the drive motor shown in

[0049] Figure 8 is Figure 6 is a schematic exploded view of the stator portion of the drive motor shown in

[0050] Figure 9 is Figure 4 is a partial enlarged schematic view of portion A of the axial flow fan shown in

[0051] Figure 10 is Figure 1 is a schematic view of the inside of the fixing groove portion of the dehumidifier shown in

[0052] Figure 11 is Figure 4 is a partial enlarged schematic view of portion B of the axial flow fan shown in DETAILED DESCRIPTION

[0053] In the description of the present embodiment, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model.

[0054] The terms "first", "second", and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include at least one of the features, that is, one or more of the features.

[0055] In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, and the like, unless otherwise specifically limited. When a certain feature "includes or contains" a certain or certain features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and can further include other features.

[0056] Unless otherwise specifically specified and limited, the terms "mount", "connect", "connect", "fix", "couple" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. Those skilled in the art should be able to understand the specific meaning of the above terms in the present utility model according to the specific circumstances.

[0057] In addition, in the description of the present utility model, the first feature "above" or "below" the second feature can include direct contact between the first and second features, or can include indirect contact between the first and second features through another feature therebetween.

[0058] That is, in the description of the present utility model, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" or "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0059] In the description of the utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, devices, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, devices, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] Unless otherwise defined, all terms (including technical and scientific terms) used in the description of the embodiments of the utility model have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0061] Figure 1 It is a schematic diagram of the dehumidifier 1 according to one embodiment of the utility model; Figure 2 It is Figure 1 It is a schematic top view of the inside of the dehumidifier 1 shown.

[0062] Referring to Figure 1 And Figure 2 As shown, the embodiment provides a dehumidifier 1, which comprises a casing 2, a heat exchanger group 3 and an axial flow fan 4, and generally also comprises a water tank, a compressor, a throttling device, a temperature sensor and the like components (not shown in the figure). Wherein the casing 2 is provided with an air inlet and an air outlet, the heat exchanger group 3 is arranged in the casing 2 and comprises an evaporator and a condenser, and the fan is arranged in the casing 2 and causes the air to flow through the evaporator and the condenser in sequence after entering the casing 2 from the air inlet, and then blow out from the air outlet.

[0063] Because the surface temperature of the evaporator is lower than the dew point temperature of the air, the water vapor in the air condenses on the surface of the evaporator and flows into the water tank, so as to achieve the purpose of reducing the humidity of the air. The air flowing through the evaporator is also reduced in temperature while reducing the humidity. These air is then passed through the condenser, heated and discharged from the casing 2 through the air outlet, so that the outlet air temperature of the dehumidifier 1 is close to the inlet air temperature, and the temperature of the ambient air is not significantly affected while dehumidifying.

[0064] The heat exchanger group 3 is usually arranged at the upper part inside the casing 2, and the water tank is arranged at the lower part inside the casing 2, so that the condensed water formed on the surface of the evaporator flows downward under the action of its own gravity and finally flows into the water tank, and therefore the air inlet of the dehumidifier 1 is also arranged at the upper part of the side wall of the casing 2.

[0065] The casing 2 of the dehumidifier 1 of the embodiment has a plurality of first side walls 21 provided with air inlets, and a second side wall 22 not provided with an air inlet, and has a top wall provided with an air outlet.Figure 1 In the illustrated embodiment, the housing 2 is designed as a cuboid and has three first sidewalls 21 and one second sidewall 22. From Figure 1 The diagram shows two first sidewalls 21 with air inlets. The second sidewall 22, without air inlets, is not shown as it is located at the rear of the diagram. The second sidewall 22 without air inlets typically serves as the rear sidewall of the dehumidifier 1, allowing it to be placed against a wall. The other sidewalls of the casing 2 serve as first sidewalls 21, each with air inlets to increase the airflow and dehumidification efficiency of the dehumidifier 1. The design of the air outlet on the top wall minimizes interference between the airflow in and out of the dehumidifier 1, thereby improving the overall airflow efficiency. In other embodiments, the casing 2 may also be designed as a triangular prism, hexagonal prism, or other shapes, with varying numbers of first sidewalls 21 and one second sidewall 22; this is not limited here.

[0066] 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.

[0067] refer to Figure 2 As shown, the heat exchanger assembly 3 is arranged in a U-shape inside the casing 2. The U-shape refers to the U-shaped cross-section of the heat exchanger assembly 3. This allows the side surfaces of the heat exchanger assembly 3 to be positioned as close as possible to the air inlets on the multiple first sidewalls 21, thereby increasing the facing area between the air inlets and the heat exchanger assembly 3 and ensuring more thorough contact between the air entering the casing 2 and the heat exchanger assembly 3. The heat exchanger assembly 3 is arranged in multiple layers, with at least one layer each for the evaporator and the condenser. The evaporator is located on the side closest to the first sidewall 21, while the condenser is located on the side relatively far from the first sidewall 21.

[0068] In this embodiment, the dehumidifier 1 is equipped with an axial fan 4 at the air outlet to promote airflow. The axial fan 4 can draw in air evenly from the lateral periphery inside the casing 2. Therefore, in conjunction with the U-shaped heat exchanger group 3 and the air inlets opened on the multiple first side walls 21, the efficiency of ventilation and dehumidification can be improved better without increasing the height of the dehumidifier 1.

[0069] Figure 3 yes Figure 1 A schematic exploded view of the axial fan 4 of the dehumidifier 1 shown.

[0070] refer to Figure 3As shown, in some optional embodiments, the axial fan 4 includes a fan housing 41, a fan body 42, and a drive motor 43. The fan housing 41 is disposed at the air outlet; a ventilation grille 412 for airflow is formed on the fan housing 41. The fan body 42 is disposed below the fan housing 41 to facilitate the formation of airflow through the ventilation grille 412. The drive motor 43 is fixed below the fan housing 41 to drive the fan body 42 to rotate.

[0071] refer to Figure 3 As shown, the fan housing 41 is located at the air outlet, and the ventilation grille 412 on the fan housing 41 divides the air outlet of the dehumidifier 1 into multiple smaller ventilation holes to prevent foreign objects from falling into the dehumidifier 1.

[0072] In some alternative embodiments, the drive motor 43 is a DC motor. That is, the drive motor 43 in this embodiment is a motor driven by direct current.

[0073] Figure 4 yes Figure 1 A schematic cross-sectional view of the axial fan 4 of the dehumidifier 1 shown.

[0074] refer to Figure 3 and Figure 4 As shown, in some alternative embodiments, the center of the fan housing 41 is recessed downward to form a fixing groove 411, and the ventilation grille 412 is formed outside the fixing groove 411. The drive motor 43 is fixed below the fixing groove 411.

[0075] The drive motor 43 and the fixing slot 411 can be fixed together using screws. Multiple screw holes are provided on the bottom surface of the fixing slot 411, allowing screws to pass through and secure the drive motor 43 to the fixing slot 411. In some optional embodiments, to conceal the screw locations, utilize the space in the fixing slot 411, and provide a display function for the dehumidifier 1, the axial fan 4 may also include a display panel 44. The display panel 44 is detachably mounted at the upper opening of the fixing slot 411. A control panel 45 may also be installed inside the fixing slot 411. The control panel 45 and the display panel 44 can cooperate to provide functions such as displaying ambient humidity and controlling the operating mode of the dehumidifier 1.

[0076] Figure 5 yes Figure 1 A schematic diagram of the structure of the fan body 42 of the dehumidifier 1 shown; Figure 6 yes Figure 1 The diagram shows the structure of the drive motor 43 of the dehumidifier 1.

[0077] refer to Figure 4 , Figure 5 and Figure 6As shown, in some optional embodiments, the fan body 42 comprises a motor cover cylinder 421 and a fan bottom cover 422. The motor cover cylinder 421 has an inner cylinder body 4211 in the shape of a cylindrical tube. The fan bottom cover 422 is arranged at the lower end of the inner cylinder body 4211 and cooperates with the inner cylinder body 4211 to define a motor cavity opening directly against the bottom surface of the fixing groove 411 and used for accommodating the driving motor 43. The driving motor 43 comprises a stator part 431 fixed relative to the fan cover 41 and a rotor part 432 fixed relative to the fan body 42; the driving motor 43 is configured to cause the rotor part 432 to rotate relative to the stator part 431 to drive the fan body 42 to rotate relative to the fan cover 41.

[0078] The driving motor 43 of the existing axial flow fan 4 needs to arrange the stator part 431 and the rotor part 432 in a closed housing, and the rotor part 432 only has a rotating shaft extending out of the housing, so the part of the rotating shaft extending out of the housing and the part of the internal space that cannot be fully utilized due to the housing packaging make the axial dimension of the driving motor 43 larger. Moreover, in order to be fixed with the housing of the driving motor 43, the axial flow fan 4 also needs to be provided with a motor support or other mounting and fixing structure at the mounting position of the driving motor 43, further causing the axial and radial dimensions of the axial flow fan 4 to increase. In order to be fixed with the rotating shaft extending out of the housing, the fan body 42 also needs to be provided with a mounting hole with a certain length in the axial direction, also causing the axial dimension of the axial flow fan 4 to increase. The above problems are superimposed, which causes the volume of the axial flow fan 4 to increase, the installation space occupied to be more, and is not conducive to the miniaturization of the household dehumidifier 1.

[0079] Reference Figure 4 and Figure 5 As shown, the axial flow fan 4 of the present embodiment defines a motor cavity in the middle of the fan body 42 and causes the fixing groove 411 to be located above the motor cavity to shield the opening of the motor cavity. By fixing the stator part 431 of the driving motor 43 relative to the fixing groove 411 and fixing the rotor part 432 relative to the fan body 42, the driving motor 43 eliminates the housing structure of itself, and accordingly eliminates the increase of the axial and radial dimensions of the axial flow fan 4 caused by the housing structure, so the axial flow fan 4 of the present embodiment is smaller in volume than the existing axial flow fan 4 under the condition that the specifications of the fan body 42 are the same. In addition, since the axial flow fan 4 of the present embodiment eliminates the housing structure of the driving motor 43 compared with the existing axial flow fan 4, the material cost of processing the housing is also saved, and the assembly process is simplified, so the process of first packaging the stator part 431 and the rotor part 432 into the housing and then mounting the driving motor 43 is simplified to directly mounting the stator part 431 and the rotor part 432.

[0080] The structure of the embodiment is fixed relative to another structure, for example, the stator portion 431 is fixed relative to the fixed groove portion 411, which includes that the stator portion 431 is in direct contact with and fixed to the fixed groove portion 411, and also includes that a third structure is arranged between the stator portion 431 and the fixed groove portion 411 to separate the two, and the stator portion 431 and the fixed groove portion 411 are in direct contact with and fixed to the third structure respectively.

[0081] The stator portion 431 of the embodiment is preferably in direct contact with and fixed to the fixed groove portion 411, which is briefly that the stator portion 431 is directly fixed to the fixed groove portion 411, or in other words, the stator portion 431 is fixed to the fixed groove portion 411. For example, in some optional embodiments, the stator portion 431 is fixed to the fixed groove portion 411 by screws.

[0082] The driving motor 43 of the embodiment is arranged in the motor cavity, and is protected by the fan body 42 on the side and below, and is protected by the fixed groove portion 411 above, so that the driving motor 43, although the shell structure is omitted, the fan body 42 and the fixed groove portion 411 are equivalent to the shell of the driving motor 43 in the protection of the driving motor 43, and dust and other impurities are still not easy to enter the driving motor 43 and cause damage.

[0083] It should be noted that the up-down direction described in the embodiment is based on the installation position of the axial flow fan 4 and the corresponding air flow direction, and the up-down direction is not strictly limited to the vertical and horizontal direction. For example, in some optional embodiments, the top wall of the cabinet 2 can be inclined to one side relative to the horizontal plane, and the air outlet and the axial flow fan 4 are correspondingly inclined. It can be understood that in such embodiments, the up-down direction includes the oblique up-down direction. Generally, the up-down direction described in the embodiment is consistent with the direction of the rotating shaft of the fan body 42 of the axial flow fan 4.

[0084] Reference Figure 5 As shown in some optional embodiments, the motor cover cylinder 421 further has an outer cylinder body 4212 which is in a cylindrical shape and has a diameter greater than that of the inner cylinder body 4211. The fan body 42 further includes a plurality of fan blades 423. The plurality of fan blades 423 are arranged on the side of the outer cylinder body 4212. The motor cover cylinder 421 further has a plurality of reinforcing ribs 4213 formed between the outer cylinder body 4212 and the inner cylinder body 4211 and extending radially; and / or the fan bottom cover 422 is further arranged at the lower end of the outer cylinder body 4212.

[0085] In this embodiment, the motor housing 421 consists of two parts: an inner cylinder 4211 and an outer cylinder 4212, with the axes of the inner cylinder 4211 and the outer cylinder 4212 coinciding. The inner wall of the inner cylinder 4211 serves as the inner wall of the motor housing 421, and together with the front side of the fan base 422, defines the motor cavity. The outer wall of the outer cylinder 4212 serves as the outer wall of the motor housing 421. As shown in the figure, the fan blades 423 are evenly distributed circumferentially on the outer wall of the outer cylinder 4212. The inner cylinder 4211 and the outer cylinder 4212 can be connected either by forming reinforcing ribs 4213 or by the fan base 422 extending outward from the lower end of the inner cylinder 4211 to the lower end of the outer cylinder 4212. The fan bottom cover 422 is located at the lower end of both the inner cylinder 4211 and the outer cylinder 4212, and can completely seal the rear end of the motor cover 421 to prevent airflow from passing through this area and to prevent the airflow from carrying dust or other impurities or moisture into the motor cavity. The reinforcing rib 4213 can further enhance the structural strength of the fan body 42.

[0086] The spacing between the inner cylinder 4211 and the outer cylinder 4212 can be adjusted according to the required size of the fan blades 423 and the space required by the drive motor 43 installed in the inner cylinder 4211. In some embodiments, the motor housing 421 may only have an inner cylinder 4211 without an outer cylinder 4212, that is, the fan blades 423 are directly installed on the outer side wall of the inner cylinder 4211.

[0087] Figure 7 yes Figure 6 A schematic exploded view of the rotor portion 432 of the drive motor 43 shown; Figure 8 yes Figure 6 A schematic exploded view of the stator section 431 of the drive motor 43 shown; Figure 9 yes Figure 4 A partially enlarged schematic diagram of part A of the axial fan 4 shown.

[0088] refer to Figure 7 As shown, in some optional embodiments, the rotor portion 432 includes a support shaft 4311, a rotor magnet 4312, and a limiting plate 4313. The support shaft 4311 is axially arranged along the motor housing 421 and fixed relative to the fan base 422. The rotor magnet 4312 is fixed relative to the inner wall of the motor housing 421. The limiting plate 4313 is disposed at the upper end of the support shaft 4311 to prevent the rotor portion 432 from moving axially relative to the stator portion 431.

[0089] The rotor part 432 of the driving motor 43 is driven by the stator part 431 to rotate the fan body 42 relative to the fixed groove part 411 of the fan shell 41. The support rotating shaft 4311 of the rotor part 432 can be fixed on the fan bottom cover 422 of the fan body 42 in various ways such as bonding, plugging, screwing, etc. In particular, in some alternative embodiments, the support rotating shaft 4311 can also be integrally formed with the fan body 42, i.e. integrally formed at the center position of the fan bottom cover 422. In this way, not only the connection between the support rotating shaft 4311 and the fan body 42 is more secure, but also the traditional fan production and assembly process is changed, the fixed structure for fixing the support rotating shaft 4311 on the fan body 42 is eliminated, and a part of the installation process related to the support rotating shaft 4311 is simplified.

[0090] There can be no direct connection between the parts of the rotor part 432, i.e. the parts of the rotor part 432 can not directly contact each other. For example, as shown in Figure 4 , the rotor magnet 4312 can be directly or indirectly fixed on the motor cover cylinder 421 of the fan body 42, and spaced apart from the support rotating shaft 4311 located at the center position. Because the support rotating shaft 4311 and the rotor magnet 4312 are both fixed relative to the fan body 42, their positions are also fixed, i.e. they rotate synchronously.

[0091] As shown in Figure 7 and Figure 9 , in some alternative embodiments, the rotor part 432 further comprises a fixed sleeve 4314. The fixed sleeve 4314 has a sleeve side plate 43141 in the shape of a cylindrical cylinder and a sleeve bottom plate 43142 located at the axial lower end of the sleeve side plate 43141; the middle part of the sleeve bottom plate 43142 is provided with a rotating shaft through hole for the support rotating shaft 4311 to pass through. The fixed sleeve 4314 is arranged in the motor cavity, and the sleeve side plate 43141 is attached to the motor cover cylinder 421, and the sleeve bottom plate 43142 is attached to the fan bottom cover 422; the rotor magnet 4312 is fixed on the inner side wall of the sleeve side plate 43141.

[0092] By providing the fixed sleeve 4314, the support rotating shaft 4311 and the rotor magnet 4312 in the rotor part 432 can be pre-installed on the fixed sleeve 4314 and installed together into the motor cavity of the fan body 42, and even the entire driving motor 43 can be installed into the motor cavity of the fan body 42 after the stator part 431 is also installed integrally. Therefore, by providing the fixed sleeve 4314, the axial flow fan 4 of the present embodiment is more conducive to modular production.

[0093] As shown in Figure 9In some alternative embodiments, the middle part of the sleeve bottom plate 43142 is upwardly protruded and forms a supporting platform 43143, and the shaft through hole is located in the center of the supporting platform 43143; the supporting platform 43143 extends downwardly from the shaft through hole and forms a fixed section 43144.

[0094] The supporting platform 43143 is used to support the stator part 431 and make the stator part 431 away from the fan bottom cover 422 of the fan body 42, so as to adjust the position of the stator part 431. Therefore, the shape of the supporting platform 43143 can be set according to the shape structure of the actual driving motor 43, especially the stator part 431. The fixed section 43144 extends rearwardly from the shaft through hole, which is used to increase the contact area between the fixed sleeve 4314 and the supporting shaft 4311, so as to better fix the supporting shaft 4311.

[0095] In particular, in some alternative embodiments, the shape of the fan bottom cover 422 of the fan body 42 can be adapted to the shape of the sleeve bottom plate 43142, and a matching supporting platform is formed at the corresponding position of the supporting platform 43143 as shown, so as to enhance the fixing effect between the fan body 42 and the rotor part 432. Figure 9

[0096] Reference is made to Figure 8 and Figure 9 In some alternative embodiments, the stator part 431 includes a fixed base 4321, a coil assembly 4322 and at least one annular bearing 4323. The fixed base 4321 is fixedly arranged on the bottom surface of the fixed groove part 411. The coil assembly 4322 is fixed on the fixed base 4321 and is used to controllably drive the rotor part 432 to rotate relative to the stator part 431. The inner ring of the annular bearing 4323 is sleeved on the supporting shaft 4311, and the outer ring is arranged on the fixed base 4321, so as to support and separate the rotor part 432 and the stator part 431.

[0097] A plurality of screw holes in different positions can be formed on the fixed base 4321 and the bottom surface of the fixed groove part 411 in advance, so as to facilitate the fixation of the stator part 431 on the fixed groove part 411 by using screws. The coil assembly 4322 can be fixed on the outer side surface of the fixed base 4321 in an axially detachable and non-rotatable manner. After the installation of the stator part 431 relative to the rotor part 432 is completed, the outer end of the coil assembly 4322 is opposite to the inner side surface of the rotor magnet 4312. The coil assembly 4322 generally includes two parts of a coil for generating a magnetic field after being energized and an iron core for fixing the coil. The shape of the iron core and the number and position of the coil can be set according to actual requirements.

[0098] ​In order to make the rotor part 432 better rotate relative to the stator part 431, the stator part 431 of the embodiment further comprises at least one annular bearing 4323, which can be a ball bearing or other type of bearing available in the market, without limitation. In order to fix the annular bearing 4323 in position in the axial direction relative to the fixed base 4321 and the support shaft 4311, the number of the annular bearings 4323 can be two as shown in the figure, and arranged in front and back in the axial direction. The rear side and inner ring of the annular bearing 4323 located in the rear side in the axial direction are supported by the supporting platform 43143, and the front side and outer ring are supported by the fixed base 4321 forming the supporting groove; the rear side and outer ring of the annular bearing 4323 located in the front side in the axial direction are supported by the fixed base 4321 forming the supporting groove, and the front side and inner ring are limited by the limiting piece 4313. In the assembly process of the axial flow fan 4, the support shaft 4311 is sequentially sleeved with the fixed sleeve 4314, the two annular bearings 4323 and the limiting piece 4313 from the rear to the front, and the fixed base 4321 is supported by the two annular bearings 4323, so that the rotor part 432 rotatably limits the stator part 431 between the fixed sleeve 4314 and the limiting piece 4313 of the rotor part 432.

[0099] The axial flow fan 4 of the embodiment is provided as described above, so that the driving motor 43 itself ensures the relative fixation of the stator part 431 and the rotor part 432 in the axial direction without setting an outer shell.

[0100] Figure 10 is Figure 1 a schematic view of the inside of the fixed groove part 411 of the dehumidifier 1.

[0101] In some optional embodiments, the stator part 431 further comprises a motor control board 4324. The motor control board 4324 is fixed on the fixed base 4321 and electrically connected with the coil assembly 4322. The motor control board 4324 is arranged close to the fixed groove part 411, and is provided with a terminal 43241 on the surface facing the fixed groove part 411. The fixed groove part 411 is provided with a wire hole 411A on the bottom surface opposite to the terminal 43241.

[0102] Reference Figure 8 and Figure 9As shown, because the drive motor 43 in this embodiment does not have a housing, the motor control board 4324 for controlling the drive motor 43 can be directly fixed to the fixing base 4321. The motor control board 4324 can be disposed between the coil assembly 4322 and the fixing slot 411 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 4321 for fixing to the fixing slot 411. In some optional embodiments, the shape of the motor control board 4324 can be circular, and the diameter is slightly smaller than the diameter of the inner cylinder 4211. At the same time, the position of the motor control board 4324 is lower than the upper end of the inner cylinder 4211, so that the motor control board 4324 is located inside the inner cylinder 4211, so as to further reduce the axial dimension of the axial fan 4.

[0103] refer to Figure 8 and Figure 10 As shown, in order to facilitate wiring, in this embodiment, the wiring terminal 43241 on the motor control board 4324 is set on its upper surface, that is, the surface facing the fixing slot 411, and a wiring hole 411A is provided on the bottom surface of the fixing slot 411 facing the wiring terminal 43241, so that the cable can pass through the fixing slot 411 and connect to the wiring terminal 43241, reducing the difficulty of cable connection and avoiding the cable from contacting the rotor part 432 of the drive motor 43 or the fan body 42.

[0104] refer to Figure 6 As shown, in some alternative embodiments, the drive motor 43 further includes a mating portion 433. The mating portion 433 includes two washers 4331 and / or a damping plate 4332. The two washers 4331 are respectively sleeved on the support shaft 4311; one washer 4331 is located between the limiting plate 4313 and the stator portion 431, and the other washer 4331 is located between the fan base cover 422 and the stator portion 431. The damping plate 4332 is sleeved on the support shaft 4311; the damping plate 4332 is located between the limiting plate 4313 and the stator portion 431, and provides a spring force to push the stator portion 431 away from the limiting plate 4313.

[0105] Figure 11 yes Figure 4 A partially enlarged schematic diagram of part B of the axial fan 4 shown.

[0106] In some alternative embodiments, the fan housing 41 further extends downward from the outside of the fixing groove 411 to form a blocking portion 413, and a downward-opening insertion cavity is formed between the side wall of the fixing groove 411 and the blocking portion 413. The diameter of the outer cylinder 4212 is larger than the diameter of the side wall of the fixing groove 411 and smaller than the diameter of the blocking portion 413, and the upper end of the outer cylinder 4212 is not lower than the lower end of the blocking portion 413.

[0107] The axial flow fan 4 of the embodiment is better to protect the motor cavity, prevent dust or other foreign matter from entering with the airflow, and also make full use of the outer cylinder 4212 formed by the fan body 42, and form a shielding part 413 on the fan cover 41 to jointly define an insertion cavity with the side wall of the fixed groove part 411. By making the front end of the outer cylinder 4212 extend into the insertion cavity, it is more difficult for the airflow to enter the motor cavity.

[0108] Reference Figure 4 As shown in some optional embodiments, the fan cover 41 also extends downward from the outside of the ventilation grille part 412 to form a cylindrical guide wall part 414, and the lower end of the guide wall part 414 is not higher than the lower end of the fan blade 423.

[0109] The guide wall part 414 limits the air in the cabinet 2 to be blown out of the air outlet only from the lower direction of the fan body 42, thereby improving the air supply efficiency of the axial flow fan 4. Because the air flow direction in the cabinet 2 is limited by the guide wall part 414, the opening position of the air inlet on the side wall of the cabinet 2 can be higher than the bottom end of the guide wall part 414, thereby increasing the opening area of the air inlet on the cabinet 2.

[0110] In some optional embodiments, the lower end of the fan body 42 is located on the same horizontal plane as the lower end of the guide wall part 414.

[0111] In the assembly process of the dehumidifier 1 of the embodiment, the axial flow fan 4 is usually assembled as a whole and then installed on the cabinet 2. By setting the lower end of the fan body 42 on the same horizontal plane as the lower end of the guide wall part 414, the lower end of the fan body 42 and the lower end of the guide wall part 414 can be located on the same operation plane during the assembly process of the axial flow fan 4, thereby reducing the assembly difficulty and improving the assembly efficiency. The lower surface of the fan bottom cover 422 can be downwardly protruded to form an annular protrusion to support the fan body 42.

[0112] The dehumidifier 1 itself is provided with a water tank to collect condensed water. Considering that the user may accidentally spill water when taking the water tank, there is a risk of entering the motor cavity from the ventilation grille part 412 or the fixed groove part 411 and damaging the motor when the water is spilled on the top wall of the cabinet 2. Therefore, the axial flow fan 4 provided on the top of the dehumidifier 1 is also improved in waterproof and drainage aspects.

[0113] Reference Figure 8 and Figure 10As shown, in some optional embodiments, the motor control board 4324 is fixedly arranged on the fixed base 4321 of the driving motor 43 and is arranged close to the fixed groove portion 411. The motor control board 4324 is provided with a wiring terminal 43241 on the surface facing the fixed groove portion 411, and the fixed groove portion 411 is provided with a wiring hole 411A on the bottom surface opposite to the wiring terminal 43241, so that the cable can pass through the fixed groove portion 411 and be connected with the wiring terminal 43241, reducing the connection difficulty of the cable and avoiding the contact between the cable and the rotor portion 432 of the driving motor 43 or the fan body 42.

[0114] In order to avoid the water entering the fixed groove portion 411 from directly contacting the motor control board 4324 through the wiring hole 411A, especially in order to avoid the water contacting the wiring terminal 43241, the embodiment further forms a waterproof step 4111 protruding upward on the side of the wiring hole 411A to prevent the water entering the fixed groove portion 411 from entering the wiring hole 411A.

[0115] Reference Figure 10 As shown, in some optional embodiments, part of the bottom surface of the fixed groove portion 411 is recessed downward to form a drainage groove 4112, and the wiring hole 411A is formed on the bottom surface of the drainage groove 4112; the fixed groove portion 411 is further provided with a first drainage hole 411B on the bottom surface of the drainage groove 4112, and the first drainage hole 411B is located on the side of the wiring hole 411A away from the center of the bottom surface of the fixed groove portion 411.

[0116] In order to avoid the water in the fixed groove portion 411 overflowing the waterproof step 4111 around the wiring hole 411A, the embodiment further provides a corresponding drainage structure in the fixed groove portion 411, that is, by recessing part of the bottom surface of the fixed groove portion 411 downward to form a drainage groove 4112, so that the water in the fixed groove portion 411 can be collected, and by providing a first drainage hole 411B on the bottom surface of the drainage groove 4112, so that the water in the fixed groove portion 411 can be drained. The first drainage hole 411B is located on the side of the wiring hole 411A away from the center of the bottom surface of the fixed groove portion 411, so that the water in the fixed groove portion 411 can be controllably drained to a position away from the motor control board 4324.

[0117] The reason why the wiring hole 411A is formed on the bottom surface of the drainage groove 4112 rather than other positions of the bottom surface of the fixed groove portion 411 is that both the wiring hole 411A and the drainage groove 4112 will cause the strength of the bottom surface of the fixed groove portion 411 at the corresponding position to be weakened. Forming the wiring hole 411A on the bottom surface of the drainage groove 4112 can ensure that other positions of the bottom surface of the fixed groove portion 411 still have high strength, thereby being more durable. It can be understood that if the strength of the bottom surface of the fixed groove portion 411 is not considered, the wiring hole 411A can also be formed at other positions of the bottom surface of the fixed groove portion 411 other than the bottom surface of the drainage groove 4112.

[0118] In some alternative embodiments, the fan body 42 comprises a motor cover cylinder 421 having a cylindrical inner cylinder body 4211, and a fan bottom cover 422 arranged at the lower end of the inner cylinder body 4211 and cooperated with the inner cylinder body 4211 to define a motor cavity for accommodating the driving motor 43. The first drain hole 411B is arranged at a distance from the axis of the fan body 42 greater than the diameter of the inner cylinder body 4211.

[0119] Referring to Figure 11 As shown, because the first drain hole 411B is arranged at a distance from the axis of the fan body 42 greater than the diameter of the inner cylinder body 4211, water in the fixed groove portion 411 can be drained to the outside of the motor cavity and cannot enter the motor cavity to damage the driving motor 43.

[0120] Further, in some alternative embodiments, the motor cover cylinder 421 further comprises a cylindrical outer cylinder body 4212 having a diameter greater than that of the inner cylinder body 4211. The fan body 42 further comprises a plurality of fan blades 423 arranged at the periphery of the outer cylinder body 4212. In this regard, referring to Figure 11 As shown, the fan cover 41 further extends downward from the outside of the fixed groove portion 411 to form a shielding portion 413, and an insertion cavity is formed between the side wall of the fixed groove portion 411 and the shielding portion 413. The diameter of the outer cylinder body 4212 is greater than that of the side wall of the fixed groove portion 411 and less than that of the shielding portion 413, and the upper end of the outer cylinder body 4212 is not lower than the lower end of the shielding portion 413.

[0121] Even if water splashed from above enters the casing 2 of the dehumidifier 1 from the ventilation grille portion 412, because the outer cylinder body 4212 of the motor cover cylinder 421 further has the shielding portion 413 outside thereof having a greater diameter and extending downward to completely shield the opening at the upper end of the outer cylinder body 4212, water is difficult to fall into the inside of the outer cylinder body 4212 from the ventilation grille portion 412, and is even more difficult to enter the motor cavity located in the inner cylinder body 4211.

[0122] Referring to Figure 5 As shown, in some alternative embodiments, the motor cover cylinder 421 further comprises a plurality of reinforcing ribs 4213 extending radially between the outer cylinder body 4212 and the inner cylinder body 4211. In some alternative embodiments, the fan bottom cover 422 is further arranged at the lower end of the outer cylinder body 4212. The reinforcing ribs 4213 and the fan bottom cover 422 each have the effect of connecting the inner cylinder body 4211 and the outer cylinder body 4212, and can be arranged simultaneously and cooperatively to enhance the structural strength of the fan body 42.

[0123] In the embodiment where the fan bottom cover 422 is not arranged at the lower end of the outer cylinder 4212, the water discharged from the first drain hole 411B can directly fall down from between the inner cylinder 4211 and the outer cylinder 4212, and generally falls into the water tank or the water receiving tray located inside the lower part of the casing 2. In the embodiment where the fan bottom cover 422 is arranged at the lower end of the outer cylinder 4212, one or more second drain holes 422A are formed on the fan bottom cover 422 between the inner cylinder 4211 and the outer cylinder 4212. After the water discharged from the first drain hole 411B falls between the inner cylinder 4211 and the outer cylinder 4212, it continues to be discharged downward through the second drain hole 422A.

[0124] In some optional embodiments, the axial flow fan 4 further comprises a display panel 44 which is detachably arranged at the upper opening of the fixed groove portion 411. Further, referring to Figure 4 and Figure 10 It is shown that the display panel 44 extends downward a plurality of lower end outward protruding pawls 441. A plurality of clamping holes 411C are formed on the sidewall of the fixed groove portion 411, each corresponding to one of the pawls 441, so that each pawl 441 is clamped into one of the clamping holes 411C.

[0125] Further, in some optional embodiments, each clamping hole 411C extends downward to the bottom surface of the fixed groove portion 411. When water enters the axial flow fan 4 of the present embodiment inside the fixed groove portion 411, in addition to the first drain hole 411B located at the bottom surface of the drain groove 4112 which can be used for drainage, the clamping holes 411C located on the sidewall of the fixed groove portion 411 also have certain drainage function.

[0126] In some optional embodiments, the stator portion 431 of the driving motor 43, specifically the upper surface of the fixed base 4321 of the stator portion 431, can be pre-formed with screw holes, and the corresponding positions of the bottom surface of the fixed groove portion 411 can also be pre-formed with screw holes, so as to facilitate the fixation of the driving motor 43 and the fixed groove portion 411 by screws during the assembly process of the axial flow fan 4.

[0127] In order to avoid the water in the fixed groove portion 411 from seeping downward from the screw holes into the motor cavity, the present embodiment particularly forms a first protrusion 4113 upwardly protruding around each screw hole on the fixed groove portion 411, so as to lift the screw holes relative to the bottom surface of the fixed groove portion 411, avoiding the contact of water with the screw holes.

[0128] Referring to Figure 8As shown, to facilitate installation and positioning, and to more securely fix the drive motor 43 to the fixing groove 411, in some optional embodiments, the drive motor 43 has a plurality of upwardly protruding positioning claws 43211 on the side near the fixing groove 411. Correspondingly, the bottom surface of the fixing groove 411 is recessed upward to form a plurality of positioning holes, each positioning hole corresponding to one positioning claw 43211, so that each positioning claw 43211 engages with one positioning hole.

[0129] The positioning hole can be used as follows Figure 10 The hole shown can be a through hole extending vertically, or it can be a blind hole closed at the top. Generally, through holes are relatively easier and less expensive to manufacture, but there is a risk that water inside the fixing groove 411 can seep downwards into the motor cavity. Therefore, in some embodiments where the positioning holes penetrate the bottom surface of the fixing groove 411 vertically, the fixing groove 411 also forms an upwardly protruding second boss 4114 around each positioning hole. The function of the second boss 4114 is similar to that of the first boss 4113, which is to raise the positioning hole relative to the bottom surface of the fixing groove 411, preventing water from contacting the positioning hole.

[0130] 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 characterised in that Comprising: a fan cover, a middle part of which is concave downward to form a fixing groove, and a ventilation grille part for air flow passing through is formed outside the fixing groove; a fan body arranged below the fan cover for promoting air flow flowing along the up-down direction and passing through the ventilation grille part; a driving motor fixed below the fixing groove for driving the fan body to rotate; the driving motor comprising: a motor control board arranged close to the fixing groove and provided with a terminal on the surface facing the fixing groove; the fixing groove is provided with a terminal hole on the bottom surface opposite to the terminal, and a waterproof step is formed upward on the side of the terminal hole.

2. The axial flow fan according to claim 1, wherein a part of the bottom surface of the fixing groove is concave downward to form a drainage groove, and the terminal hole is formed on the bottom surface of the drainage groove; the fixing groove is further provided with a first drainage hole on the bottom surface of the drainage groove, and the first drainage hole is located on the side of the terminal hole away from the center of the bottom surface of the fixing groove.

3. The axial fan according to claim 2, characterized in that the fan body comprising: a motor cover cylinder having an inner cylinder body in the shape of a cylindrical tube; a fan bottom cover arranged at the lower end of the inner cylinder body and defining a motor cavity together with the inner cylinder body, the motor cavity being open to the bottom surface of the fixing groove and used for accommodating the driving motor; the distance between the first drainage hole and the axis of the fan body is greater than the diameter of the inner cylinder body.

4. The axial flow fan according to claim 3, wherein the motor cover cylinder further has an outer cylinder body in the shape of a cylindrical tube and with a diameter greater than that of the inner cylinder body; the fan body further comprising: a plurality of fan blades arranged on the side of the outer cylinder body; the fan cover further extends downward from the outside of the fixing groove to form a shielding part, and an insertion cavity is formed between the side wall of the fixing groove and the shielding part, the insertion cavity being open downward; the diameter of the outer cylinder body is greater than that of the side wall of the fixing groove and smaller than that of the shielding part, and the upper end of the outer cylinder body is not lower than the lower end of the shielding part.

5. The axial flow fan according to claim 4, wherein the motor cover cylinder further has a plurality of reinforcing ribs extending radially between the outer cylinder body and the inner cylinder body; and / or the fan bottom cover is further arranged at the lower end of the outer cylinder body, and one or more second drainage holes are formed in the fan bottom cover between the inner cylinder body and the outer cylinder body.

6. The axial fan of claim 1, wherein further comprising: a display panel detachably arranged at the upper opening of the fixing groove.

7. The axial flow fan according to claim 6, wherein the display panel extends downward to a plurality of lower end protrusions outward in the axial direction; and the side wall of the fixing groove is provided with a plurality of clamping holes, each of the clamping holes corresponding to one of the clamping protrusions, so that each of the clamping protrusions is clamped into one of the clamping holes.

8. The axial flow fan according to claim 7, wherein each of the clamping holes extends downward to the bottom surface of the fixing groove.

9. The axial flow fan according to claim 1, wherein A plurality of screw holes are further formed in the bottom surface of the fixing groove portion, and the driving motor is fixed to the fixing groove portion by screws passing through the screw holes. A first protrusion is formed on the periphery of each screw hole of the fixing groove portion.

10. The axial fan according to claim 1, wherein A plurality of positioning claws are formed on the side of the driving motor close to the fixing groove portion. A plurality of positioning holes are formed in the bottom surface of the fixing groove portion, each corresponding to one of the positioning claws, so that each positioning claw is engaged in one of the positioning holes.

11. The axial fan according to claim 10, wherein Each positioning hole penetrates the bottom surface of the fixing groove portion, and a second protrusion is formed on the periphery of each positioning hole of the fixing groove portion.

12. A dehumidifier, characterized by It comprises: A casing, a side wall of which is provided with an air inlet, and a top wall of which is provided with an air outlet; An axial fan is arranged at the air outlet to form an air flow that enters the casing from the air inlet and is blown out from the air outlet; the axial fan is according to any one of claims 1 to 11.

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