Fan assembly and air conditioner

Abstract

The fan assembly comprises a wind wheel, a motor and a waterproof cover, the wind wheel comprises a hub and blades, the blades are arranged on the periphery of the hub, the motor comprises a motor shell and a motor shaft, an opening is formed in the side, facing the wind wheel, of the motor shell, the driving end of the motor shaft extends out of the motor shell through the opening, and the waterproof cover is arranged in the motor shell. And the wind wheel is inserted and matched with the hub to drive the wind wheel to rotate. The waterproof cover is arranged between the hub and the motor shell and arranged on the motor shaft in a sleeving mode, the waterproof cover comprises a cover body part and a sleeve part, the cover body part covers the opening, and the sleeve part is connected to the side, away from the motor shell, of the cover body part and extends into the hub. The waterproof cover is arranged to cover the opening, so that external pollutants can be prevented from directly entering the motor shell from the opening; and the sleeve part of the waterproof cover extends into the hub to form double sealing, and an overlapped labyrinth structure is formed, so that the sealing reliability is high, and the condition that water drops permeate into the motor shell along a gap between the hub and the motor shaft can be improved.

Description

Technical Field

[0001] The utility model relates to the field of air-conditioning equipment, in particular to a fan assembly and an air conditioner. Background Art

[0002] The air conditioner outdoor unit is exposed to the outside for a long time, so it places high demands on the waterproofness of the motor. The weak point of the motor is the bearing. The life of the bearing determines the life of the motor. Once the bearing is filled with water, the bearing grease will corrode, causing noise and insufficient life due to aging and deterioration. In addition, water will enter the motor from the matching position of the bearing and the shaft, causing the surface of the stator and rotor core to rust and get stuck, and even corrode the internal winding of the motor, causing problems such as short circuit between turns and burning.

[0003] A waterproof cover is usually placed on the outside of the motor to protect the bearings. However, the sealing reliability of the waterproof cover in the related art is poor, and there is room for improvement. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a fan assembly, the waterproof cover of which has strong sealing reliability and can improve the working stability of the fan assembly.

[0005] The utility model also provides an air conditioner with the fan assembly.

[0006] According to the first aspect of the utility model, the wind turbine assembly includes: a wind wheel, the wind wheel includes a hub and blades, and the blades are arranged on the outer periphery of the hub; a motor, the motor includes a motor housing and a motor shaft, and an opening is provided on the side of the motor housing facing the wind wheel, and the driving end of the motor shaft extends out of the motor housing through the opening, and is plugged into the hub to drive the wind wheel to rotate; a waterproof cover, the waterproof cover is arranged between the hub and the motor housing, and is sleeved on the motor shaft, the waterproof cover includes a cover body and a sleeve part, the cover body part covers the opening, and the sleeve part is connected to the side of the cover body part away from the motor housing and extends into the hub.

[0007] According to the fan assembly of the embodiment of the utility model, a waterproof cover is arranged outside the motor shaft, and the waterproof cover is arranged at the opening, so that external pollutants can be prevented from directly entering the motor casing from the opening; and a sleeve portion of the waterproof cover is arranged to extend into the wheel hub, so as to form a double seal and an overlapping maze structure. The sealing structure formed by the sleeve portion and the wheel hub has strong sealing reliability, which can improve the situation where water droplets penetrate into the motor casing along the gap between the wheel hub and the motor shaft, thereby improving the working reliability of the fan assembly.

[0008] In some embodiments, an axial hole is formed on the wheel hub, the axial hole is a stepped hole and includes a first hole segment and a second hole segment, the first hole segment is arranged on a side of the second hole segment close to the motor housing, and the aperture of the first hole segment is larger than the aperture of the second hole segment, the motor shaft passes through the axial hole and is in transmission cooperation with the second hole segment, and the sleeve portion extends into the first hole segment.

[0009] In some embodiments, a first sealing ring protrudes from the outer peripheral wall of the sleeve portion. The first sealing ring is located in the first hole segment and has a clearance fit or an interference fit with the hole wall of the first hole segment.

[0010] In some embodiments, the first sealing ring is disposed at an end of the sleeve portion away from the cover body portion; and / or a cross-sectional contour line of the first sealing ring is an outward convex curve.

[0011] In some embodiments, a second sealing ring protrudes from the inner circumferential wall of the sleeve portion, and the second sealing ring has a clearance fit or an interference fit with the motor shaft.

[0012] In some embodiments, the second sealing ring is disposed at an end of the sleeve portion away from the cover portion.

[0013] In some embodiments, an axial overlapping length L between the sleeve portion and the first hole segment is greater than or equal to 2 mm.

[0014] In some embodiments, the outer circumferential wall of the sleeve portion is in sealing cooperation with the wheel hub; and / or, the inner circumferential wall of the sleeve portion is in sealing cooperation with the motor shaft.

[0015] In some embodiments, a mounting groove is formed on the motor shaft, the first end of the cover body is connected to the sleeve portion and is embedded in the mounting groove, and the second end of the cover body is expanded and extended toward the motor housing relative to the first end to cover the opening.

[0016] In some embodiments, the motor housing includes a housing body and a bearing cover, the motor includes a stator and a rotor arranged in the housing body, the bearing cover is installed on the housing body and includes a cover body and a water-blocking nozzle, the motor includes a bearing arranged in the cover body, the motor shaft is connected to the rotor and is rotatably supported on the bearing, the water-blocking nozzle is connected to one end of the cover body close to the wheel hub and defines the opening, and the water-blocking nozzle is flared toward the direction of the wheel hub so that the outer peripheral surface of the water-blocking nozzle is formed into an annular recessed surface.

[0017] An air conditioner according to the second aspect of the utility model comprises the fan assembly according to the first aspect of the utility model.

[0018] According to the air conditioner of the utility model, by providing the fan assembly of the first aspect, the working reliability of the air conditioner can be improved.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural schematic diagram of a fan assembly according to an embodiment of the utility model;

[0021] Figure 2 is based on Figure 1 A partial enlarged view of area A of the example shown;

[0022] Figure 3 is based on Figure 1 A partial enlarged view of region B of the example shown;

[0023] Figure 4 is based on Figure 1 A partial enlarged view of region C of the example shown;

[0024] Figure 5 It is a structural explosion diagram of a fan assembly according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] Fan assembly 100;

[0027] Wind wheel 1; hub 11; shaft hole 111; first hole section 1111; second hole section 1112; blade 12;

[0028] Motor 2; motor housing 21; opening 21a; housing body 211; bearing cover 212; cover body 2121; water blocking nozzle 2122; motor shaft 22; mounting groove 221; bearing 25;

[0029] Waterproof cover 3; cover body 31; first end 31a; second end 31b; sleeve part 32; first sealing ring 321; second sealing ring 322. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0032] The fan assembly 100 according to the first embodiment of the utility model is described below with reference to the accompanying drawings.

[0033] According to the fan assembly 100 of the first embodiment of the utility model, Figure 1 As shown, the wind turbine assembly 100 includes: a wind wheel 1, a motor 2 and a waterproof cover 3. The wind wheel 1 includes a hub 11 and blades 12. The blades 12 are arranged on the outer periphery of the hub 11. The motor 2 includes a motor housing 21 and a motor shaft 22. An opening 21a is provided on the side of the motor housing 21 facing the wind wheel 1. The driving end of the motor shaft 22 extends out of the motor housing 21 through the opening 21a and is plugged and matched with the hub 11 to drive the wind wheel 1 to rotate. The waterproof cover 3 is arranged between the hub 11 and the motor housing 21, and is sleeved on the motor shaft 22. The waterproof cover 3 includes a cover body 31 and a sleeve 32. The cover body 31 is covered in the opening 21a, and the sleeve 32 is connected to the side of the cover body 31 away from the motor housing 21 and extends into the hub 11.

[0034] The motor 2 is used to drive the wind wheel 1 to rotate, and the blades 12 rotate to generate a flow of air. The hub 11 of the wind wheel 1 and the motor shaft 22 are in transmission cooperation. The motor housing 21 is the outer contour of the motor 2, which can protect and support the internal components. The driving part of the motor shaft 22 extends from the opening 21a of the motor housing 21, and the driving end of the motor shaft 22 is connected to the hub 11. The motor shaft 22 is inserted into the hub 11, and the hub 11 is wrapped outside the motor shaft 22, and the motor shaft 22 is plugged into the hub 11.

[0035] In the related art, water easily flows into the motor housing from the opening along the motor shaft, or directly flows into the motor housing from the opening, affecting the normal use of the motor.

[0036] Therefore, in the embodiment of the utility model, a waterproof cover 3 is sleeved on the motor shaft 22, and the waterproof cover 3 rotates synchronously with the motor shaft 22. The waterproof cover 3 is arranged between the wheel hub 11 and the motor housing 21, and the waterproof cover 3 includes a cover body 31 and a sleeve 32. The cover body 31 is arranged to cover the opening 21a, which can prevent external pollutants, such as dust and water droplets, from directly entering the motor housing 21 through the opening 21a, thereby improving the working reliability of the motor 2.

[0037] It is worth noting that the motor shaft 22 is connected to the wheel hub 11, and the motor shaft 22 and the wheel hub 11 rotate synchronously, and the waterproof cover 3 also rotates synchronously with the motor shaft 22, so the waterproof cover 3 can extend into the wheel hub 11 and connect with the wheel hub 11 to improve the sealing effect.

[0038] The sleeve portion 32 is connected to the cover body portion 31 and extends toward the side away from the motor housing 21, that is, the sleeve portion 32 extends toward the wind wheel 1, and the sleeve portion 32 extends into the hub 11. The sleeve portion 32 and the cover body portion 31 cover the portion of the motor shaft 22 extending out of the motor housing 21, and the waterproof cover 3 and the hub 11 have an overlapping portion in the axial direction, so that the portion of the motor shaft 22 extending out of the motor housing 21 is completely protected inside the hub 11 and the waterproof cover 3, preventing water drops from falling on the motor shaft 22 and flowing into the motor housing 21 along the motor shaft 22.

[0039] The sleeve portion 32 extends into the wheel hub 11. In the radial direction from the outside to the inside, the wheel hub 11, the sleeve portion 32 and the motor shaft 22 are arranged in sequence. A layer of seal is formed between the sleeve portion 32 and the wheel hub 11, and a second layer of seal is formed between the sleeve portion 32 and the motor shaft 22, forming a double seal, which can reduce the occurrence of water droplets flowing into and contacting the motor shaft 22.

[0040] Furthermore, the sleeve portion 32 extends into the wheel hub 11, and the sleeve portion 32 and the wheel hub 11 have an overlapping portion in the axial direction. The sleeve portion 32 forms an overlapping labyrinth structure between the wheel hub 11 and the motor shaft 22, and water is less likely to flow into the motor housing 21 from the gap between the sleeve portion 32 and the wheel hub 11, and the gap between the sleeve portion 32 and the motor shaft 22. The sealing structure formed by the sleeve portion 32 and the wheel hub 11 has a strong sealing reliability, which can reduce the occurrence of water droplets penetrating into the motor housing 21 along the gap between the wheel hub 11 and the motor shaft 22.

[0041] According to the fan assembly 100 of the embodiment of the utility model, by arranging a waterproof cover 3 to be outermost around the motor shaft 22, and the waterproof cover 3 is arranged on the opening 21a, external pollutants can be prevented from directly entering the motor housing 21 from the opening 21a; and by arranging a sleeve portion 32 of the waterproof cover 3 to extend into the wheel hub 11, a double seal is formed, and an overlapping maze structure is formed. The sealing structure formed by the sleeve portion 32 and the wheel hub 11 has strong sealing reliability, which can improve the situation where water droplets penetrate into the motor housing 21 along the gap between the wheel hub 11 and the motor shaft 22, thereby improving the working reliability of the fan assembly 100.

[0042] In other embodiments of the present invention, the sleeve portion 32 is connected to a side of the cover portion 31 away from the motor housing 21 and extends to surround the outside of the wheel hub 11 .

[0043] In the radial direction from outside to inside, the sleeve portion 32, the wheel hub 11 and the motor shaft 22 are arranged in sequence, a layer of seal is formed between the sleeve portion 32 and the wheel hub 11, and a second layer of seal is formed between the wheel hub 11 and the motor shaft 22, forming a double seal, which can reduce the occurrence of water droplets flowing into and contacting the motor shaft 22. Similarly, an overlapping labyrinth structure is formed between the sleeve portion 32, the wheel hub 11 and the motor shaft 22, and water is less likely to flow into the inside of the motor housing 21 from the gap between the sleeve portion 32 and the wheel hub 11, and the gap between the wheel hub 11 and the motor shaft 22.

[0044] In some embodiments of the present invention, Figure 2 As shown, an axial hole 111 is formed on the wheel hub 11, and the axial hole 111 is a stepped hole and includes a first hole section 1111 and a second hole section 1112. The first hole section 1111 is arranged on a side of the second hole section 1112 close to the motor housing 21, and the aperture of the first hole section 1111 is larger than the aperture of the second hole section 1112. The motor shaft 22 passes through the axial hole 111 and is in transmission cooperation with the second hole section 1112, and the sleeve portion 32 extends into the first hole section 1111.

[0045] The shaft hole 111 is used for inserting and fitting the motor shaft 22. The shaft hole 111 includes a first hole segment 1111 and a second hole segment 1112 arranged in sequence along the axial direction. The first hole segment 1111 is arranged closer to the motor 2 than the second hole segment 1112. The motor shaft 22 is inserted into the shaft hole 111 along the axial direction from the motor 2 to the wind wheel 1. The motor shaft 22 passes through the first hole segment 1111 and the second hole segment 1112 for transmission fit. The motor shaft 22 and the first hole end are arranged at intervals in the radial direction.

[0046] The sleeve portion 32 extends axially from the motor 2 to the wind wheel 1 into the first hole segment 1111. In the radial direction from the outside to the inside, the first hole segment 1111, the sleeve portion 32 and the motor shaft 22 are arranged in sequence. A layer of seal is formed between the sleeve portion 32 and the first hole segment 1111, and a second layer of seal is formed between the sleeve portion 32 and the motor shaft 22, forming a double seal.

[0047] In some embodiments of the present invention, Figure 3 As shown, a first sealing ring 321 protrudes from the outer peripheral wall of the sleeve portion 32 . The first sealing ring 321 is located in the first hole section 1111 and has an interference fit with the hole wall of the first hole section 1111 .

[0048] The first sealing ring 321 surrounds the sleeve portion 32, and the first sealing ring 321 is interference fit with the hole wall of the first hole section 1111, so that the outer peripheral wall of the first sealing ring 321 and the inner wall surface of the first hole section 1111 are sealed and connected, reducing the occurrence of water penetrating into the first hole section 1111 along the gap between the sleeve portion 32 and the first hole section 1111. In addition, the sleeve portion 32 can improve the connection stability between the sleeve portion 32 and the wheel hub 11 through the interference fit of the first sealing ring 321 and the first hole section 1111, and reduce the shaking between the sleeve portion 32 and the wheel hub 11.

[0049] In other embodiments of the present invention, a first sealing ring 321 protrudes from the outer peripheral wall of the sleeve portion 32 . The first sealing ring 321 is located in the first hole section 1111 , and the first sealing ring 321 is gap-matched with the hole wall of the first hole section 1111 .

[0050] The first sealing ring 321 can reduce the gap between the sleeve portion 32 and the first hole section 1111, thereby reducing the water from penetrating into the first hole section 1111 along the gap between the sleeve portion 32 and the first hole section 1111. The clearance between the first sealing ring 321 and the hole wall of the first hole section 1111 can reduce the wear of the first sealing ring 321, which is beneficial to prolonging the service life of the sleeve portion 32.

[0051] In some embodiments of the present invention, Figure 3 As shown, the first sealing ring 321 is arranged at the end of the sleeve portion 32 away from the cover body portion 31. The first sealing ring 321 is only arranged at the end of the sleeve portion 32, which can achieve a sealing effect while saving manufacturing costs; and the first sealing ring 321 is arranged at the end of the sleeve portion 32 away from the cover body portion 31, which can reduce the difficulty of manufacturing the waterproof cover 3.

[0052] In other embodiments of the present invention, the first sealing ring 321 is disposed at the overlapping portion of the sleeve portion 32 and the first hole section 1111 close to the cover body 31 , and the first sealing ring 321 is disposed at the end of the first hole section 1111 close to the cover body 31 .

[0053] The first sealing ring 321 is arranged at the end of the first hole section 1111 of the sleeve portion 32 close to the cover body portion 31 to directly block the opening 21a of the first hole section 1111 facing the motor 2, which can improve the sealing effect and save manufacturing costs.

[0054] In some other embodiments of the present invention, the first sealing ring 321 is disposed at the overlapping portion of the sleeve portion 32 and the first hole section 1111, and the axial extension size of the first sealing ring 321 is consistent with the size of the overlapping portion of the sleeve portion 32 and the first hole section 1111. The first sealing ring 321 has a longer axial size, which can further improve the sealing reliability of the sleeve portion 32 and the first hole section 1111.

[0055] In some embodiments of the present invention, Figure 3 As shown, the cross-sectional profile of the first sealing ring 321 is an outward convex curve.

[0056] The outer peripheral surface of the first sealing ring 321 is a curved surface and the cross-sectional shape is an outward convex curve. The first sealing ring 321 and the hole wall of the first hole section 1111 form a line seal. Compared with the surface-to-surface seal, the line seal has a better sealing effect and can further improve the sealing reliability of the sleeve portion 32 and the first hole section 1111.

[0057] In some embodiments of the present invention, Figure 3 As shown, a second sealing ring 322 protrudes from the inner peripheral wall of the sleeve portion 32 , and the second sealing ring 322 is interference fit with the motor shaft 22 .

[0058] The second sealing ring 322 is interference-fitted with the motor shaft 22, so that the inner peripheral wall of the second sealing ring 322 and the outer peripheral wall of the motor shaft 22 are sealed and connected, reducing the occurrence of water penetrating into the interior of the sleeve portion 32 along the gap between the sleeve portion 32 and the motor shaft 22. In addition, the sleeve portion 32 can improve the connection stability of the sleeve portion 32 and the motor shaft 22 through the interference fit of the second sealing ring 322 and the motor shaft 22, and reduce the shaking between the sleeve portion 32 and the motor shaft 22.

[0059] In some other embodiments of the present invention, a second sealing ring 322 protrudes from the inner peripheral wall of the sleeve portion 32 , and the second sealing ring 322 is clearance-matched with the motor shaft 22 .

[0060] The second sealing ring 322 can reduce the gap between the sleeve portion 32 and the motor shaft 22, thereby reducing the water from penetrating into the sleeve portion 32 along the gap between the sleeve portion 32 and the motor shaft 22. In addition, the clearance fit between the second sealing ring 322 and the motor shaft 22 can reduce the wear of the second sealing ring 322, which is beneficial to prolonging the service life of the sleeve portion 32.

[0061] In some embodiments of the present invention, Figure 3 As shown, the second sealing ring 322 is disposed at the end of the sleeve portion 32 away from the cover portion 31 .

[0062] The second sealing ring 322 is only arranged at the end of the sleeve portion 32, which can achieve a sealing effect while saving manufacturing costs; the second sealing ring 322 is arranged at the end of the sleeve portion 32 away from the cover body portion 31, which can also reduce the manufacturing difficulty of the waterproof cover 3.

[0063] Furthermore, by providing the second sealing ring 322 and the motor shaft 22 for sealing cooperation, compared with sealing cooperation of the entire inner wall of the sleeve portion 32 with the motor shaft 22, it is beneficial to the assembly of the waterproof cover 3 and the motor shaft 22 and can improve the efficiency of assembly and disassembly.

[0064] In some embodiments of the present invention, Figure 3 As shown, the axial overlapping length L between the sleeve portion 32 and the first hole segment 1111 is greater than or equal to 2 mm.

[0065] The axially overlapping portion of the sleeve portion 32 and the first hole section 1111 forms a seal. The larger the axial overlapping length L of the sleeve portion 32 and the first hole section 1111, the better the sealing effect of the sleeve portion 32 and the wheel hub 11. Therefore, the overlapping length L is set to be greater than or equal to 2 mm.

[0066] It is worth noting that if the axial overlapping length L between the sleeve portion 32 and the first hole segment 1111 is too large, the manufacturing cost of the waterproof cover 3 will increase. Therefore, the axial overlapping length L between the sleeve portion 32 and the first hole segment 1111 should not be too large.

[0067] In some embodiments of the present invention, the outer peripheral wall of the sleeve portion 32 is sealed and matched with the wheel hub 11 .

[0068] Optionally, the outer circumferential wall of the sleeve portion 32 and the wheel hub 11 are connected via a sealing sponge; or, further optionally, a sealing ring is provided on the outer circumferential wall of the sleeve portion 32 and the inner circumferential wall of the wheel hub 11 .

[0069] In some embodiments of the present invention, the inner circumferential wall of the sleeve portion 32 is sealed with the motor shaft 22 .

[0070] Optionally, the outer circumferential wall of the sleeve portion 32 and the wheel hub 11 are connected via a sealing sponge; or, further optionally, a sealing ring is provided on the outer circumferential wall of the sleeve portion 32 and the inner circumferential wall of the wheel hub 11 .

[0071] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, a mounting groove 221 is formed on the motor shaft 22, and the first end 31a of the cover body 31 is connected to the sleeve portion 32 and is embedded in the mounting groove 221, which can improve the installation stability of the waterproof cover 3. The second end 31b of the cover body 31 is expanded relative to the first end 31a and extends toward the direction of the motor housing 21 to cover the opening 21a. Figure 4 As shown, in the axial direction, the axial overlapping length of the cover body 31 and the motor housing 21 is relatively long, and the protection effect on the opening 21 a is better, which can prevent external pollutants from directly entering the motor housing 21 through the opening 21 a.

[0072] In some embodiments of the present invention, Figure 4 and Figure 5As shown, the motor housing 21 includes a housing body 211 and a bearing cover 212, the motor 2 includes a stator and a rotor arranged in the housing body 211, the bearing cover 212 is mounted on the housing body 211 and includes a cover body 2121 and a water blocking nozzle 2122, the motor 2 includes a bearing 25 arranged in the cover body 2121, and the motor shaft 22 is connected to the rotor and rotatably supported on the bearing 25. The water blocking nozzle 2122 is connected to one end of the cover body 2121 close to the wheel hub 11 and defines an opening 21a, and the water blocking nozzle 2122 is expanded toward the direction of the wheel hub 11 so that the outer peripheral surface of the water blocking nozzle 2122 is formed into an annular concave surface.

[0073] The stator is connected to the motor housing 21 and is immovable relative to the motor housing 21. The rotor is connected to the motor shaft 22 and drives the motor shaft 22 to rotate relative to the motor housing 21. The motor shaft 22 is rotatably supported on the bearing cover 212 through the bearing 25, which can improve the rotation stability of the motor shaft 22.

[0074] The water blocking nozzle 2122 of the bearing cover 212 is located on the side of the motor housing 21 close to the wind wheel 1, and the water blocking nozzle 2122 defines an opening 21a opened toward the wind wheel 1. The water blocking nozzle 2122 is expanded toward the direction of the hub 11 so that the outer peripheral surface of the water blocking nozzle 2122 is formed into an annular concave surface, wherein the annular refers to an annular shape surrounding the motor shaft 22, and the concave refers to the cross-sectional shape of the water blocking nozzle 2122 being concave inward.

[0075] like Figure 4 As shown in the figure, the dotted line with an arrow is the movement path of the water droplets. When the water droplets flow from the second end 31b of the cover body 31 and the motor housing 21 into the cover body 31 and the motor housing 21, they will gather on the outer peripheral surface of the water blocking nozzle 2122, and then the water droplets will gather and flow naturally under the action of gravity, and then flow out from between the cover body 31 and the motor housing 21. The outer peripheral surface shape of the water blocking nozzle 2122 can gather water droplets, thereby preventing water droplets between the cover body 31 and the motor housing 21 from flowing into the motor housing 21 from the opening 21a, thereby improving the working reliability of the motor 2.

[0076] The air conditioner according to the second embodiment of the utility model is described below.

[0077] The air conditioner according to the embodiment of the second aspect of the utility model comprises the fan assembly 100 according to the embodiment of the first aspect of the utility model.

[0078] According to the air conditioner of the embodiment of the utility model, by providing the fan assembly 100 of the first aspect of the embodiment, the working reliability of the air conditioner can be improved.

[0079] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are 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.

[0080] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fan assembly, characterized in that: include: A wind wheel, the wind wheel comprising a hub and blades, the blades being arranged on the periphery of the hub; A motor, the motor comprising a motor housing and a motor shaft, the motor housing having an opening on one side facing the wind wheel, the driving end of the motor shaft extending out of the motor housing through the opening and plugging with the wheel hub to drive the wind wheel to rotate; A waterproof cover is provided between the wheel hub and the motor housing and sleeved on the motor shaft. The waterproof cover comprises a cover body and a sleeve. The cover body covers the opening, and the sleeve is connected to a side of the cover body away from the motor housing and extends into the wheel hub.

2. The fan assembly according to claim 1, characterized in that: An axial hole is formed on the wheel hub, and the axial hole is a stepped hole and includes a first hole section and a second hole section. The first hole section is arranged on a side of the second hole section close to the motor housing, and the aperture of the first hole section is larger than the aperture of the second hole section. The motor shaft passes through the axial hole and is in transmission cooperation with the second hole section, and the sleeve portion extends into the first hole section.

3. The fan assembly according to claim 2, characterized in that: A first sealing ring protrudes from the outer peripheral wall of the sleeve portion. The first sealing ring is located in the first hole segment and has a clearance fit or an interference fit with the hole wall of the first hole segment.

4. The fan assembly according to claim 3, characterized in that: The first sealing ring is arranged at the end of the sleeve portion away from the cover body portion; and / or the cross-sectional contour line of the first sealing ring is an outward convex curve.

5. The fan assembly according to claim 2, characterized in that: A second sealing ring protrudes from the inner peripheral wall of the sleeve portion, and the second sealing ring is clearance-fitted or interference-fitted with the motor shaft.

6. The fan assembly according to claim 5, characterized in that: The second sealing ring is arranged at the end of the sleeve portion away from the cover body portion.

7. The fan assembly according to claim 2, characterized in that: An axial overlapping length L between the sleeve portion and the first hole segment is greater than or equal to 2 mm.

8. The fan assembly according to claim 1, characterized in that: The outer peripheral wall of the sleeve portion is in sealing cooperation with the wheel hub; and / or the inner peripheral wall of the sleeve portion is in sealing cooperation with the motor shaft.

9. The fan assembly according to claim 1, characterized in that: A mounting groove is formed on the motor shaft, the first end of the cover body is connected to the sleeve portion and is embedded in the mounting groove, and the second end of the cover body is expanded and extended toward the motor housing relative to the first end to cover the opening.

10. The fan assembly according to any one of claims 1 to 9, characterized in that: The motor housing includes a housing body and a bearing cover, the motor includes a stator and a rotor arranged in the housing body, the bearing cover is installed on the housing body and includes a cover body and a water blocking nozzle, the motor includes a bearing arranged in the cover body, the motor shaft is connected to the rotor and is rotatably supported on the bearing, the water blocking nozzle is connected to one end of the cover body close to the wheel hub and defines the opening, and the water blocking nozzle is expanded toward the direction of the wheel hub so that the outer peripheral surface of the water blocking nozzle is formed into an annular recessed surface.

11. An air conditioner, characterized in that: Comprising a fan assembly according to any one of claims 1-10.

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