Fan and air treatment equipment

Abstract

The utility model discloses a fan and air handling equipment, the fan comprises a stator assembly, a rotating shaft, a rotor assembly and a wind wheel, the stator assembly comprises a stator body provided with a containing cavity, a bearing seat provided with a bearing chamber and a bearing, the bearing seat is installed in the containing cavity, and the bearing is fixedly installed in the bearing chamber; the rotating shaft is mounted on the bearing; the rotor assembly is installed on the rotating shaft and arranged around the periphery of the stator assembly. The wind wheel is located on one side of the rotor assembly in the axial direction and installed on the rotating shaft. Wherein the bearing seat is an elastic structural member, the radial rigidity of the bearing seat is k, the total mass of the rotating shaft, the rotor assembly and the wind wheel is m, the unbalance amount of the rotating shaft, the rotor assembly and the wind wheel is U, the maximum angular velocity of the rotor assembly is omega, # imgabs0 # is met, and g is gravitational acceleration. The bearing seat of the fan is high in structural rigidity, can provide stable radial support for the wind wheel, the rotor assembly and the rotating shaft, effectively guarantees rotation precision, and reduces the risk of chamber sweeping faults.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan and air treatment equipment. Background Art

[0002] In the motor assembly of the fan, radial support is generally provided to the rotor and the rotating shaft through a sliding bearing assembly. However, in the related art, the structural rigidity of the sliding bearing assembly is poor. During the operation of the fan, the rotation axis of the rotor and the rotating shaft will deviate from the central axis of the stator, resulting in poor rotation accuracy. Especially in high temperature and high humidity environments, it is easy to cause the motor assembly to have a chamber failure. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a wind turbine with a bearing seat having a high structural rigidity, capable of providing stable radial support for the wind wheel, rotor assembly, and rotating shaft, effectively ensuring rotational accuracy and reducing the risk of chamber sweeping failures.

[0004] The utility model also provides an air treatment device having the above-mentioned fan.

[0005] According to an embodiment of the first aspect of the present invention, a wind turbine includes a stator assembly, including a stator body, a bearing seat and a bearing, wherein the stator body is provided with an accommodating cavity, the bearing seat is mounted in the accommodating cavity, the bearing seat is provided with a bearing chamber, and the bearing is fixedly mounted in the bearing chamber; a rotating shaft is passed through the bearing chamber and mounted on the bearing; a rotor assembly is mounted on the rotating shaft and arranged around the outer circumference of the stator assembly; a wind wheel is located on one side of the rotor assembly in the axial direction and mounted on the rotating shaft; wherein the bearing seat is an elastic structural member, the radial stiffness of the bearing seat is k, the total mass of the rotating shaft, the rotor assembly and the wind wheel is m, the unbalance amount of the rotating shaft, the rotor assembly and the wind wheel is U, the maximum angular velocity of the rotor assembly is ω, and the following conditions are satisfied: , g is the acceleration due to gravity.

[0006] The fan according to the embodiment of the first aspect of the present invention has at least the following beneficial effects: by installing a bearing seat between the stator body and the bearing, the bearing seat is an elastic structural member, and the radial stiffness k of the bearing seat satisfies That is, according to the total weight and imbalance of the rotating shaft, rotor assembly and wind wheel, a bearing seat with larger radial stiffness is selected, thereby increasing the structural stiffness of the bearing seat, so that the bearing seat can withstand the radial force applied by the rotating shaft, rotor assembly and wind wheel, and provide stable radial support to the rotating shaft, rotor assembly and wind wheel, effectively ensuring the rotation accuracy of the rotating shaft, rotor assembly and wind wheel, and ensuring that the bearing seat can provide stable support even in high temperature and high humidity environments, thereby reducing the risk of chamber sweeping failure, effectively improving the operating stability of the fan, reducing vibration and reducing noise.

[0007] According to some embodiments of the present invention, the stator body and the bearing seat are interference fit.

[0008] According to some embodiments of the present invention, the stator body includes a first clamping portion, and the bearing seat includes a second clamping portion, and the second clamping portion is engaged with the first clamping portion to limit the axial freedom of the bearing seat.

[0009] According to some embodiments of the present invention, the first clamping portion is a convex portion protruding from the inner peripheral wall of the accommodating cavity, and the second clamping portion is a concave portion recessed relative to the outer peripheral wall of the bearing seat, and the convex portion is accommodated in the concave portion.

[0010] According to some embodiments of the present invention, a guide portion is provided at one end of the bearing seat, and the guide portion is used to guide the protrusion to fit into the recess.

[0011] According to some embodiments of the present invention, the bearing chamber includes an arcuate inner wall, which is recessed toward the outer peripheral wall of the bearing seat along the radial direction of the rotating shaft; the bearing includes an arcuate outer wall, which protrudes toward the arcuate inner wall along the radial direction of the rotating shaft, and the arcuate outer wall abuts against the arcuate inner wall.

[0012] According to some embodiments of the present invention, the bearing chamber includes a first end face perpendicular to the axial direction, the first end face faces the wind wheel, and the bearing includes a second end face located at one end along the axial direction, the second end face abuts against the first end face.

[0013] According to some embodiments of the present invention, the rotor assembly includes a second plastic-encapsulated body and a plurality of magnetic tiles, the second plastic-encapsulated body includes a first end plate and an annular plate connected to one side of the first end plate along the axial direction, the plurality of magnetic tiles are mounted on the annular plate and arranged at intervals along the circumference of the stator assembly, and the wind wheel is connected to the other side of the first end plate along the axial direction.

[0014] According to some embodiments of the present invention, the rotor assembly includes a second plastic-sealed body and a magnetic ring, the second plastic-sealed body includes a second end plate, the magnetic ring is installed on one side of the second end plate along the axial direction and arranged around the outer periphery of the stator assembly, and the wind wheel is connected to the other side of the second end plate along the axial direction.

[0015] According to some embodiments of the present invention, the second plastic package body and the wind wheel are integrally formed.

[0016] The air treatment equipment according to the embodiment of the second aspect of the present utility model includes the fan according to the embodiment of the first aspect of the present utility model.

[0017] The air treatment equipment according to the second embodiment of the present invention has at least the following beneficial effects: the air treatment equipment adopts the above-mentioned fan, by installing a bearing seat between the stator body and the bearing, the bearing seat is an elastic structural member, and the radial stiffness k of the bearing seat satisfies That is, according to the total weight and imbalance of the rotating shaft, rotor assembly and wind wheel, a bearing seat with larger radial stiffness is selected, thereby increasing the structural stiffness of the bearing seat, so that the bearing seat can withstand the radial force applied by the rotating shaft, rotor assembly and wind wheel, and provide stable radial support to the rotating shaft, rotor assembly and wind wheel, effectively ensuring the rotation accuracy of the rotating shaft, rotor assembly and wind wheel, and ensuring that the bearing seat can provide stable support even in high temperature and high humidity environments, thereby reducing the risk of chamber sweeping failure, effectively improving the operating stability of the fan, reducing vibration and reducing noise.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 is a cross-sectional view of a fan in an embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional view of the connection between the first plastic package body and the stator core in an embodiment of the present utility model;

[0022] Figure 3 is a cross-sectional view of a bearing seat in an embodiment of the present utility model;

[0023] Figure 4 is a cross-sectional view of a bearing in an embodiment of the present utility model;

[0024] Figure 5 This is a cross-sectional view of the connection between the rotor assembly and the rotating shaft in another embodiment of the present invention;

[0025] Figure 6 It is a cross-sectional view of the connection between the rotor assembly and the rotating shaft in another embodiment of the present invention.

[0026] Reference numerals:

[0027] Stator assembly 100; first plastic package body 110; accommodating cavity 111; first clamping portion 112; bearing seat 120; bearing chamber 121; arcuate inner wall 1211; first end surface 1212; second clamping portion 122; guide portion 123; bearing 130; arcuate outer wall 131; second end surface 132; oil groove 133; dust cover 134; stator core 140; end cover 150;

[0028] Rotating shaft 200;

[0029] Rotor assembly 300; second plastic package body 310; first end plate 311; annular plate 312; second end plate 313; magnetic tile 320; magnetic ring 330; magnetic conductive ring 340;

[0030] Wind wheel 400. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. 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 only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, assembling, and matching should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Reference Figures 1 to 6 As shown, the first embodiment of the present invention provides a fan for use in air handling equipment. The air handling equipment herein may be an air conditioner, an air cooler, an air purifier, a humidifier, etc. For example, the fan is part of the air outlet device of the indoor unit of an air conditioner, used to blow the cool or warm air from the air conditioner into the room.

[0036] Reference Figure 1 and Figure 2 As shown, it can be understood that the wind turbine includes a motor assembly, a rotating shaft 200, and a wind wheel 400, wherein the motor assembly is an outer rotor motor and includes a stator assembly 100 and a rotor assembly 300. Specifically, the stator assembly 100 includes a stator core 140, a first plastic package 110, a bearing seat 120, a bearing 130, and an end cap 150. The first plastic package 110 is a plastic structure that covers the stator core 140, so that the first plastic package 110 and the stator core 140 form a whole. The whole of the first plastic package 110 and the stator core 140 is the stator body. The first plastic package 110 can completely cover the outer periphery of the stator core 140, or the outer peripheral wall of the stator core 140 is exposed from the first plastic package 110. The end cap 150 is mounted on one axial end of the first plastic package body 110. For example, the end cap 150 and the first plastic package body 110 are connected by adhesive bonding, snap-fitting, or by fasteners such as screws. The axial direction is the direction of the central axis of the stator assembly 100. The direction around the central axis of the stator assembly 100 is the circumferential direction. The direction perpendicular to the central axis of the stator assembly 100 and pointing from the central axis of the stator assembly 100 toward the outer periphery of the stator assembly 100, and the direction opposite thereto, is the radial direction.

[0037] Reference Figure 2 As shown, it can be understood that a receiving cavity 111 is provided in the middle of the first plastic package body 110. The cross-section of the receiving cavity 111 (perpendicular to the axial direction) is circular, and the central axis of the receiving cavity 111 coincides with the central axis of the stator assembly 100. The two ends of the receiving cavity 111 along the central axis respectively penetrate the end walls of the first plastic package body 110 along the axial direction.

[0038] Reference Figure 1 and Figure 3As shown, it can be understood that the bearing seat 120 is installed in the accommodating cavity 111 and fixed to the first plastic package body 110. The central portion of the bearing seat 120 is provided with a bearing chamber 121. The cross-section of the bearing chamber 121 is also circular, and the central axis of the bearing chamber 121 coincides with the central axis of the accommodating cavity 111. The two ends of the bearing chamber 121 along the central axis respectively penetrate the end walls of the bearing seat 120 along the axial direction. In other words, the bearing seat 120 generally has a sleeve structure.

[0039] Reference Figure 1 As shown, it can be understood that the bearing seat 120 and the first plastic package body 110 are in an interference fit, so that the bearing seat 120 is fixed to the first plastic package body 110 and the bearing seat 120 is prevented from rotating relative to the first plastic package body 110. Of course, the bearing seat 120 and the first plastic package body 110 can also be connected by a rib and groove structure that constrain each other in the circumferential direction to prevent the bearing seat 120 from rotating relative to the first plastic package body 110; or the bearing seat 120 and the first plastic package body 110 can be matched by a key connection; or the outer peripheral wall of the bearing seat 120 and the inner peripheral wall of the accommodating cavity 111 can also be adhered to each other to fix the bearing seat 120 to the first plastic package body 110.

[0040] Reference Figure 1 As shown, it can be understood that the axial dimension of the bearing seat 120 is equal to the axial dimension of the accommodating cavity 111, and the end surfaces of the bearing seat 120 are respectively located at the axial ends of the accommodating cavity 111. In other words, the bearing seat 120 covers the axial range of the accommodating cavity 111. This can maximize the contact area between the bearing seat 120 and the first plastic package body 110, effectively improving the installation stability of the bearing seat 120.

[0041] Reference Figure 1 and Figure 4 As shown, it will be understood that bearing 130 is fixedly mounted in bearing housing 121. An interference fit is formed between bearing 130 and bearing seat 120, securing bearing 130 to bearing seat 120. Bearing 130 is a sliding bearing, which offers advantages such as smooth, reliable operation, and low noise, thus ensuring reliable operation of the fan. Generally speaking, the axial dimension of bearing 130 is smaller than that of bearing seat 120, and bearing 130 is entirely located within bearing housing 121 to prevent dust and provide lubrication for bearing 130.

[0042] Reference Figure 1As shown, it can be understood that one end of the rotating shaft 200 is inserted into the bearing chamber 121 and mounted on the bearing 130. That is, one end of the rotating shaft 200 is inserted into the inner hole of the bearing 130, and a certain clearance is provided between the outer circumferential wall of the rotating shaft 200 and the inner circumferential wall of the inner hole of the bearing 130 to enable the rotating shaft 200 to rotate relative to the bearing 130. The other end of the rotating shaft 200 extends out of the bearing chamber 121 toward the side away from the end cover 150.

[0043] Reference Figure 4 As shown, it will be understood that to ensure lubrication, an oil groove 133 is provided on the inner circumferential wall of the inner bore of bearing 130. Oil groove 133 can store a certain amount of lubricating oil, thereby providing sufficient lubrication to the rotating shaft 200, ensuring smooth rotation of shaft 200. Furthermore, a dust cover 134 is provided at one axial end of bearing 130. Dust cover 134 is located at the end of bearing 130 facing away from end cap 150. Dust cover 134 is sleeved over shaft 200, thereby preventing dust from entering the inner bore of bearing 130, ensuring smooth rotation of shaft 200 and extending the service life of bearing 130.

[0044] Of course, the bearing 130 may also be of other structural forms. For example, the bearing 130 is a rolling bearing, and the rotating shaft 200 is fixedly connected to the inner ring of the rolling bearing.

[0045] Reference Figure 1 As shown, it can be understood that the rotor assembly 300 is mounted on the shaft section of the rotating shaft 200 that extends out of the bearing chamber 121, and the rotor assembly 300 is arranged around the outer periphery of the stator assembly 100. Specifically, the rotor assembly 300 includes a second plastic encapsulation body 310 and a plurality of magnetic tiles 320. The plurality of magnetic tiles 320 are located on the outer periphery of the stator assembly 100 and are arranged at equal intervals along the circumference of the stator assembly 100. The second plastic encapsulation body 310 is coated around the plurality of magnetic tiles 320, so that the second plastic encapsulation body 310 and the plurality of magnetic tiles 320 form a single unit. Similarly, the second plastic encapsulation body 310 can be completely wrapped around the outer periphery of the magnetic tiles 320, or the magnetic tiles 320 can be exposed from the second plastic encapsulation body 310 on the wall surface facing the stator assembly 100.

[0046] Reference Figure 1As shown, it can be understood that the second plastic package body 310 includes a first end plate 311 and an annular plate 312. The first end plate 311 is generally circular in shape. The annular plate 312 is connected to the outer edge of the first end plate 311 and extends toward one side of the thickness direction of the first end plate 311. A through hole is provided in the center of the first end plate 311 and fits over the shaft section of the rotating shaft 200 that extends out of the bearing chamber 121. The first end plate 311 is located on the side of the first plastic package body 110 facing away from the end cap 150 and is fixedly connected to the rotating shaft 200. For example, the first end plate 311 and the rotating shaft 200 are fixed together by a key connection or by a circumferentially constrained rib and groove structure, so that the first plastic package body 110 and the rotating shaft 200 can rotate synchronously. The annular plate 312 is located on the side of the first end plate 311 facing the end cap 150 and is arranged around the outer circumference of the stator assembly 100. The magnetic shoe 320 is embedded in the annular plate 312.

[0047] Reference Figure 5 As shown, it can be understood that in other embodiments, the rotor assembly 300 further includes a magnetic conductive ring 340, which is arranged around the outer periphery of the stator assembly 100, and a plurality of magnetic tiles 320 are mounted on the outer peripheral wall of the magnetic conductive ring 340 and arranged at equal intervals along the circumference of the stator assembly 100, and the annular plate 312 of the second plastic package body 310 is covered with the plurality of magnetic tiles 320 and the magnetic conductive ring 340, and the magnetic conductive ring 340 is exposed on the annular plate 312 toward the wall of the stator assembly 100.

[0048] Therefore, under the joint action of the stator core 140 and the plurality of magnetic tiles 320 , the rotor assembly 300 and the rotating shaft 200 can be driven to rotate synchronously.

[0049] Reference Figure 6 As shown, it will be understood that in other embodiments, the rotor assembly 300 includes a second plastic package body 310 and a magnetic ring 330. The second plastic package body 310 includes a second end plate 313. The second end plate 313 has a generally circular shape and is located on the side of the first plastic package body 110 facing away from the end cover 150. The second end plate 313 is fixedly connected to the rotating shaft 200. The connection method between the second end plate 313 and the rotating shaft 200 can refer to the connection method between the first end plate 311 and the rotating shaft 200, and will not be repeated here. The magnetic ring 330 is mounted on the side of the second end plate 313 facing the end cover 150 and is arranged around the outer circumference of the stator assembly 100. For example, the magnetic ring 330 is snap-fitted to the second end plate 313, or the magnetic ring 330 is bonded to the second end plate 313, or the magnetic ring 330 is fixed to the second end plate 313 by fasteners such as screws. Therefore, similarly, under the joint action of the stator core 140 and the magnetic ring 330 , the rotor assembly 300 and the rotating shaft 200 can be driven to rotate synchronously.

[0050] Reference Figure 1As shown, it is understood that the rotor 400 is mounted on the shaft section of the rotating shaft 200 that extends out of the bearing housing 121 and is located on the side of the rotor assembly 300 facing away from the end cap 150. The central axis of the rotor 400 coincides with the central axis of the rotating shaft 200. The rotor 400 is fixedly connected to the rotating shaft 200, or the rotor 400 is fixedly connected to the second plastic encapsulation body 310, that is, the rotor 400 is fixedly connected to the side of the first end plate 311 (or the second end plate 313) facing away from the end cap 150. Alternatively, the rotor 400 is fixedly connected to both the rotating shaft 200 and the second plastic encapsulation body 310. When the rotor 400 is fixedly connected to the rotating shaft 200, the two can be secured together by a key connection or by an interference fit. When the wind wheel 400 is fixedly connected to the second plastic package 310, the wind wheel 400 is fixed to the second plastic package 310 using fasteners such as screws. Alternatively, the wind wheel 400 can also be a plastic component and integrally molded with the second plastic package 310. The assembly of the wind wheel 400 and the second plastic package 310 can be obtained through an injection molding process, which facilitates processing. Therefore, when the rotor assembly 300 and the rotating shaft 200 rotate, the wind wheel 400 can be driven to rotate, achieving air supply.

[0051] During the rotation of the wind wheel 400 , the rotor assembly 300 and the rotating shaft 200 , the bearing seat 120 bears the radial force applied by the rotating shaft 200 . Conversely, the bearing seat 120 provides reverse supporting force to the rotating shaft 200 to ensure stable rotation of the rotating shaft 200 .

[0052] Generally speaking, one end of the rotating shaft 200 is supported by the bearing seat 120 and the bearing 130 , and the other end is supported by the bracket and the bearing on the bracket.

[0053] To reduce noise, the bearing seat 120 is configured as an elastic structural part, such as a rubber part, a polypropylene plastic part or a polyethylene plastic part. When an external force is applied to the bearing seat 120, the bearing seat 120 can deform. After the external force is removed, the bearing seat 120 returns to its original shape. Therefore, the bearing seat 120 can provide a buffering effect in the radial direction, which can slow down the impact force between the bearing 130 and the first plastic package body 110, thereby reducing noise.

[0054] The radial stiffness of the bearing seat 120 is defined as k. It is easy to understand that within the radial elastic range of the bearing seat 120, the radial stiffness k of the bearing seat 120 is a constant value. The radial stiffness k of the bearing seat 120 is reflected in the radial support capacity for the bearing 130. The larger the radial stiffness k of the bearing seat 120, the better the radial support capacity for the bearing 130, and the better the rotational stability of the wind wheel 400, the rotor assembly 300 and the rotating shaft 200. Conversely, the worse the radial support capacity for the bearing 130.

[0055] Define the total mass of the shaft 200, rotor assembly 300, and rotor 400 as m, and the total weight of the shaft 200, rotor assembly 300, and rotor 400 as mg, where g is the acceleration due to gravity. Generally speaking, in wind turbine applications, the shaft 200 is horizontally arranged, and the bearing 130 and bearing seat 120 must radially withstand the gravitational forces of the shaft 200, rotor assembly 300, and rotor 400.

[0056] Define the imbalance (i.e., the dynamic imbalance) of the rotating shaft 200, rotor assembly 300, and wind rotor 400 as U, and the maximum angular velocity of the rotor assembly 300 as ω. Due to manufacturing errors and the uneven distribution of the total mass of the rotating shaft 200, rotor assembly 300, and wind rotor 400, which deviates from the axis of rotation, imbalance inevitably exists in the rotating system of the rotating shaft 200, rotor assembly 300, and wind rotor 400. During rotation, this imbalance manifests as centrifugal force, the magnitude of which is Uω. 2 The centrifugal force is applied to the bearing 130 and the bearing seat 120. Excessive imbalance can cause the rotation axis of the rotating system of the rotating shaft 200, the rotor assembly 300 and the wind wheel 400 to deviate from the central axis of the stator assembly 100, resulting in a scavenging fault.

[0057] Typically, to minimize imbalance, a mass is installed on the outer wall of the rotor 400 to minimize the imbalance. Let's define the radius of the rotor 400 as r1 and the mass of the mass installed on the outer wall of the rotor 400 as m1. When r1m1 = U, the imbalance is zero. The value of imbalance U can be directly measured using equipment such as a dynamic balancing instrument.

[0058] The radial stiffness of the bearing seat 120 is k, the total mass of the rotating shaft 200, the rotor assembly 300 and the wind wheel 100 is m, the unbalance of the rotating shaft 200, the rotor assembly 300 and the wind wheel 400 is U, and the maximum angular velocity of the rotor assembly 300 is ω. .

[0059] It is understandable that It can be understood as the radial force borne by the bearing seat 120 during the rotation of the rotating system of the shaft 200, the rotor assembly 300 and the wind wheel 400. It can be understood that the ratio of the radial force borne by the bearing seat 120 to the radial stiffness of the bearing seat 120 is greater than 0 and less than or equal to 0.315. In other words, when selecting the material for the bearing seat 120, the radial stiffness k of the bearing seat 120 is determined based on the total weight and imbalance of the rotating system of the shaft 200, the rotor assembly 300 and the wind wheel 400, and meets .

[0060] make ,exist Under the premise that the value of is determined, the radial stiffness k of the bearing seat 120 is large, thereby increasing the structural stiffness of the bearing seat 120, so that the bearing seat 120 can withstand the radial force applied by the rotating shaft 200, the rotor assembly 300 and the wind wheel 400, and provide stable radial support to the rotating shaft 200, the rotor assembly 300 and the wind wheel 400, thereby improving the rotational stability of the wind wheel 400, the rotor assembly 300 and the rotating shaft 200, and effectively ensuring the rotation accuracy of the rotating shaft 200, the rotor assembly 300 and the wind wheel 400, and ensuring that the bearing seat 120 can provide stable support even in a high temperature and high humidity environment, thereby reducing the risk of a sweeping failure in the motor assembly, effectively improving the operating stability of the fan, and reducing vibration and noise.

[0061] It is easy to understand that when the radial single-sided force on the bearing seat 120 that meets the above parameter relationship is 19N, the radial single-sided deformation of the bearing seat 120 is less than 1mm.

[0062] Reference Figures 1 to 3 As shown, it can be understood that the first plastic sealing body 110 and the bearing seat 120 are snap-fitted to form a constraint in the axial direction. Specifically, the first plastic sealing body 110 includes a first snap-fit ​​portion 112, which is a convex portion and is provided on the inner peripheral wall of the accommodating cavity 111, that is, the convex portion protrudes radially from the inner peripheral wall of the accommodating cavity 111, and the convex portion can be annular or arc-shaped. The first snap-fit ​​portion 112 is located at one end of the accommodating cavity 111 close to the end cover 150. Correspondingly, the bearing seat 120 includes a second snap-fit ​​portion 122, which is a concave portion and is provided on the outer peripheral wall of the bearing seat 120, that is, the concave portion is radially recessed relative to the outer peripheral wall of the bearing seat 120. Similarly, the concave portion can be annular or arc-shaped, and when the convex portion is annular, the concave portion is also annular. The convex portion is accommodated in the concave portion, so that the convex portion and the concave portion form a constraint in the axial direction, that is, the first plastic sealing body 110 and the bearing seat 120 form a constraint in the axial direction, thereby preventing the bearing seat 120 from moving axially relative to the first plastic sealing body 110, that is, limiting the axial freedom of the bearing seat 120, which is beneficial to improving the installation stability of the bearing seat 120.

[0063] Since the bearing seat 120 is an elastic structural component with a certain deformation amount, when installing the bearing seat 120, the bearing seat 120 can be pressed into the accommodating cavity 111 from the opening on the side of the accommodating cavity 111 away from the end cover 150. At the position of the convex portion, the bearing seat 120 is squeezed and deformed. As the bearing seat 120 is further pressed in, the installation of the bearing seat 120 is completed until the convex portion is accommodated in the concave portion, which facilitates assembly.

[0064] Of course, the first clamping portion 112 can be a concave portion, and the second clamping portion 122 can be a convex portion that can be accommodated in the concave portion, that is, the positions of the convex portion and the concave portion on the first plastic package body 110 and the bearing seat 120 can be interchanged, which will not be repeated here.

[0065] Reference Figure 3 As shown, it can be understood that a guide portion 123 is provided at one end of the bearing seat 120 along the axial direction. Specifically, the guide portion 123 is provided on the outer peripheral wall of the bearing seat 120 and is located at the end of the bearing seat 120 facing the end cover 150. The guide portion 123 has an inclined or curved surface structure, and the outer diameter of the guide portion 123 decreases along the axial direction and in the direction close to the end cover 150. Therefore, when installing the bearing seat 120, the guide portion 123 first contacts the protrusion. As the bearing seat 120 is further pressed in, the guide portion 123 guides the end of the bearing seat 120 to insert into the space on the side of the protrusion facing the central axis of the accommodating cavity 111. The bearing seat 120 is squeezed and deformed until the protrusion is accommodated in the recess. In this way, by providing the guide portion 123, the bearing seat 120 can be easily deformed under the pressure of the protrusion, making it easier to accommodate the protrusion in the recess, thereby facilitating installation.

[0066] Reference Figure 3 and Figure 4 As shown, it can be understood that the bearing chamber 121 includes a curved inner wall 1211, which is annular and radially recessed toward the outer circumferential wall of the bearing seat 120. Correspondingly, the bearing 130 includes a curved outer wall 131, which protrudes radially toward the curved inner wall 1211. The curved outer wall 131 mates with and abuts against the curved inner wall 1211. Therefore, when installing the bearing 130, the bearing 130 can be adjusted along the curved inner wall 1211 to ensure that the central axis of the bearing 130 coincides with the central axis of the stator assembly 100 as closely as possible, thereby improving installation accuracy. Furthermore, after the bearing 130 is pressed into the bearing chamber 121, a certain constraint is formed between the bearing seat 120 and the bearing 130 in both axial directions at the curved inner wall 1211, thereby preventing axial displacement of the bearing 130 relative to the bearing seat 120 and improving the installation stability of the bearing 130.

[0067] Reference Figure 3 and Figure 4 As shown, it can be understood that the bearing chamber 121 includes a first end face 1212 perpendicular to the axial direction. The first end face 1212 is located at the end of the arc-shaped inner wall 1211 axially close to the end cover 150, that is, the first end face 1212 faces the wind rotor 400. Correspondingly, the bearing 130 includes a second end face 132. The second end face 132 is located at the end of the bearing 130 axially facing away from the wind rotor 400. After the bearing 130 is installed in the bearing chamber 121, the second end face 132 contacts the first end face 1212. Therefore, when installing the bearing 130, the bearing seat 120 can position the bearing 130 in the axial direction through the first end face 1212, which facilitates installation and ensures that the bearing 130 is installed in place, that is, ensures that the arc-shaped outer wall 131 contacts the arc-shaped inner wall 1211, preventing the bearing 130 from loosening.

[0068] The air treatment equipment of the second embodiment of the present invention includes the fan of the first embodiment of the present invention. The air treatment equipment can be an air conditioner, an air cooler, an air purifier, a humidifier, etc. The fan is part of the air outlet device of the air treatment equipment and is used to make the air flow to form wind. It will not be repeated here.

[0069] Since the air handling equipment adopts all the technical solutions of the fan in the above embodiment, it has at least all the beneficial effects brought about by the technical solutions of the above embodiment.

[0070] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A fan, characterized in that: include: The stator assembly includes a stator body, a bearing seat and a bearing, wherein the stator body is provided with an accommodating cavity, the bearing seat is installed in the accommodating cavity, the bearing seat is provided with a bearing chamber, and the bearing is fixedly installed in the bearing chamber; a rotating shaft passing through the bearing chamber and mounted on the bearing; a rotor assembly, mounted on the rotating shaft and arranged around the outer circumference of the stator assembly; a wind wheel, located on one side of the rotor assembly along the axial direction and mounted on the rotating shaft; The bearing seat is an elastic structural member, the radial stiffness of the bearing seat is k, the total mass of the rotating shaft, the rotor assembly and the wind wheel is m, the unbalance of the rotating shaft, the rotor assembly and the wind wheel is U, the maximum angular velocity of the rotor assembly is ω, and the following conditions are satisfied: , g is the acceleration due to gravity.

2. The fan according to claim 1, characterized in that: The stator body and the bearing seat are interference fit.

3. The fan according to claim 1, characterized in that: The stator body includes a first clamping portion, and the bearing seat includes a second clamping portion. The second clamping portion is clamped and matched with the first clamping portion to limit the axial freedom of the bearing seat.

4. The fan according to claim 3, characterized in that: The first clamping portion is a convex portion protruding from the inner peripheral wall of the accommodating cavity, and the second clamping portion is a concave portion recessed relative to the outer peripheral wall of the bearing seat, and the convex portion is accommodated in the concave portion.

5. The fan according to claim 4, characterized in that: A guide portion is provided at one end of the bearing seat, and the guide portion is used to guide the convex portion to fit into the concave portion.

6. The fan according to claim 1, characterized in that: The bearing chamber includes an arcuate inner wall, which is recessed toward the outer peripheral wall of the bearing seat along the radial direction of the rotating shaft. The bearing includes an arcuate outer wall, which protrudes toward the arcuate inner wall along the radial direction of the rotating shaft, and the arcuate outer wall abuts against the arcuate inner wall.

7. The fan according to claim 6, characterized in that: The bearing chamber includes a first end surface perpendicular to the axial direction, the first end surface faces the wind wheel, and the bearing includes a second end surface located at one end along the axial direction, the second end surface abuts against the first end surface.

8. The fan according to claim 1, characterized in that: The rotor assembly includes a second plastic-encapsulated body and a plurality of magnetic tiles. The second plastic-encapsulated body includes a first end plate and an annular plate connected to one side of the first end plate along the axial direction. The plurality of magnetic tiles are mounted on the annular plate and arranged at intervals along the circumference of the stator assembly. The wind wheel is connected to the other side of the first end plate along the axial direction.

9. The fan according to claim 1, characterized in that: The rotor assembly includes a second plastic-encapsulated body and a magnetic ring. The second plastic-encapsulated body includes a second end plate. The magnetic ring is installed on one side of the second end plate along the axial direction and arranged around the outer circumference of the stator assembly. The wind wheel is connected to the other side of the second end plate along the axial direction.

10. The fan according to claim 8 or 9, characterized in that: The second plastic package body and the wind wheel are integrally formed.

11. Air treatment equipment, characterized in that The wind turbine comprises the wind turbine according to any one of claims 1 to 10.

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