Fan end cover assembly, fan assembly and air conditioner indoor unit

Abstract

The utility model relates to a draught fan end cover assembly, a draught fan assembly and an air conditioner indoor unit, and the draught fan end cover assembly comprises an end cover structure used for being connected to the end side of a draught fan; the magnet ring is matched with the end cover structure in an inserted mode on the side, back on to the fan, of the end cover structure, and the distance of the magnet ring extending into the end cover structure is not larger than 5 mm. The annular magnetic ring is fixedly connected in the mode of being inserted into the end cover structure, a weak magnetic area is reduced, the distance of the magnetic ring extending into the end cover structure is set to be not larger than 5mm, the situation that the weak magnetic area is too large due to the fact that the distance of the magnetic ring extending into the end cover structure is larger than 5mm is avoided, the waveform of the magnetic ring is guaranteed, and the reliability of the magnetic ring is improved. And the matched motor is stable in operation and reliable and stable in performance.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fans, and in particular to a fan end cover assembly, a fan component, and an air conditioner indoor unit. Background Art

[0002] The end cap structure of the fan end cap assembly for a through-flow magnetic fan blade is connected to a magnet structure. This magnet structure electromagnetically cooperates with the motor. When the motor is powered, the magnet structure drives the end cap structure to rotate, thereby driving the fan. In related art, due to limitations in magnet manufacturing processes or magnetizing equipment, the magnet structure may have weak magnetic regions. For example, if the magnet structure is bowl-shaped, the bottom of the bowl and the area connected to the bottom of the bowl have weak magnetic fields. This makes it difficult to ensure optimal coordination with the motor, affecting motor performance. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a fan end cover assembly, a fan component and an air conditioner indoor unit.

[0004] According to a first aspect of an embodiment of the present disclosure, a fan end cover assembly is provided, comprising: an end cover structure for connecting to the end side of the fan; and a magnetic ring, plugged into and mated with the end cover structure on a side of the end cover structure facing away from the fan, wherein the magnetic ring extends into the end cover structure by no more than 5 mm.

[0005] Optionally, the magnetic ring extends into the end cover structure by a distance of not less than 4 mm.

[0006] Optionally, the end cover structure includes a main body and a split part that are matingly connected. In the radial direction of the fan, the wall thickness of the main body and the wall thickness of the split part together constitute the wall thickness of the end cover structure, and the number of the split parts is at least one.

[0007] Optionally, along the axial direction of the fan, the insertion depth of the main body and the split part is not less than 2.7 mm.

[0008] Optionally, along the axial direction of the fan, the insertion depth of the main body and the split part is no more than 3.8 mm.

[0009] Optionally, the main body is used to connect to the end side of the fan, the split part is arranged on the side of the main body facing the fan, and the magnetic ring is plugged into the main body, or the split part is arranged on the side of the main body facing away from the fan, and the magnetic ring is plugged into the split part.

[0010] Optionally, the end cover structure includes a circumferential wall surrounding the circumference, and the magnetic ring is inserted into the circumferential wall.

[0011] Optionally, the circumferential wall comprises a main wall and an extension wall, the magnetic ring is inserted into the main wall, and the extension wall extends axially from the main wall to a side away from the fan, and the extension wall is radially spaced from the outer periphery of the magnetic ring.

[0012] Optionally, the end cover structure comprises a main body and a split part connected together, and the outer wall surface of the circumferential wall is an outer wall surface of the main body, or the outer wall surface of the circumferential wall is an outer wall surface of the split part.

[0013] Optionally, the end cover structure comprises a circumferential wall, and the magnetic ring is inserted into the circumferential wall, and the wall thickness of the circumferential wall is 1.5-3 mm.

[0014] Optionally, the end cover structure comprises a main body and a split part connected together, and in the radial direction of the fan, the wall thickness of the main body and the wall thickness of the split part together constitute the wall thickness of the circumferential wall, and the wall thickness of the main body and the wall thickness of the split part are respectively 1.5-3 mm.

[0015] Optionally, in the axial direction of the fan, the ratio of the size of the area of the magnetic ring directly facing the motor to the size of the entire magnetic ring is 0.8-0.9.

[0016] Optionally, the magnetic ring comprises a ring body and an insertion ring, the insertion ring extends axially at one end of the ring body, the end cover structure is formed with an insertion groove, the insertion ring is inserted into the insertion groove, and the wall thickness of the insertion ring is smaller than the wall thickness of the ring body.

[0017] Optionally, the magnetic ring comprises a positioning protrusion, the positioning protrusion protrudes radially from the insertion ring, and the end cover structure is formed with a positioning groove to match and accommodate the positioning protrusion.

[0018] Optionally, the number of the positioning protrusions is multiple, and the multiple positioning protrusions are arranged at intervals in the circumferential direction of the insertion ring.

[0019] According to a second aspect of the embodiments of the present disclosure, a fan assembly is provided, comprising a fan, a motor, and a fan end cover assembly provided by the present disclosure, the fan and the motor are arranged on two sides of the fan end cover assembly and connected through a rotating shaft, and the magnetic ring is arranged radially outside the motor.

[0020] According to a third aspect of the embodiments of the present disclosure, an air conditioner indoor unit is provided, comprising the fan assembly provided by the present disclosure.

[0021] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the annular magnetic ring is fixedly connected by being inserted into the end cover structure, thereby reducing the weak magnetic area, and the distance by which the magnetic ring extends into the end cover structure is set to be no more than 5 mm, so that the magnetic ring extending into the end cover structure will not exceed 5 mm, resulting in an excessively large weak magnetic area, thereby ensuring the waveform of the magnetic ring and making the motor used with it run smoothly and have reliable and stable performance.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] Figure 1 It is a cross-sectional view of a fan end cover assembly according to an exemplary embodiment.

[0025] Figure 2 According to an exemplary embodiment Figure 1 Enlarged view of part A in .

[0026] Figure 3 is a cross-sectional view of another fan end cover assembly according to an exemplary embodiment.

[0027] Figure 4 is a cross-sectional view of another fan end cover assembly according to an exemplary embodiment.

[0028] Figure 5 is a schematic diagram of a magnetic ring according to an exemplary embodiment.

[0029] Figure 6 It is a schematic diagram showing a split component according to an exemplary embodiment.

[0030] Figure 7 The figure is an exploded schematic diagram of a fan end cover assembly according to an exemplary embodiment.

[0031] Description of Reference Numerals

[0032] 1-motor, 10-end cover structure, 101-circumferential wall, 1011-main wall, 1012-extension wall, 102-plug-in slot, 103-positioning slot, 11-main body, 12-split part, 20-magnetic ring, 21-ring body, 22-plug-in ring, 23-positioning protrusion, 30-rotating shaft. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0034] Reference Figures 1 to 4 According to a first aspect of an embodiment of the present disclosure, there is provided a fan end cover assembly, which includes an end cover structure 10 and a magnetic ring 20. The end cover structure 10 is used to be connected to the end side of the fan so as to be coaxially connected to the fan and to protect the fan. The magnetic ring 20 is plugged into and matched with the end cover structure 10 on the side of the end cover structure 10 facing away from the fan. For example, the magnetic ring 20 can be plugged into the end cover structure 10, that is, the magnetic ring 20 can be inserted into the end cover structure 10, and the two can achieve this plug-in fit by injection molding.

[0035] The area where the magnet and the end cap structure fit together is prone to becoming a weak magnetic area. In the related art, the bowl bottom of the bowl of the bowl-shaped magnet fits in with the end cap structure. This type of magnet has a large weak magnetic area, which affects the magnet waveform and thus affects the motor performance. To this end, in the embodiment of the present disclosure, the magnetic ring 20 is inserted into the end cap structure 10 to reduce the fitting area, and the distance of the insertion into the end cap structure 10 is no more than 5mm, that is, Figure 2 As shown in FIG, the distance a can be 5 mm, 4 mm, etc. Figure 1 For example, the left side of the figure is used to install the fan, and the right side is used to install the motor 1. The fan, the fan end cover assembly and the motor are supported by the rotating shaft 30 when rotating.

[0036] Through the above technical solution, the annular magnetic ring 20 is fixedly connected by being inserted into the end cover structure 10, thereby reducing the weak magnetic area. In addition, the distance by which the magnetic ring 20 extends into the end cover structure 10 is set to be no more than 5 mm, so that the magnetic ring 20 extending into the end cover structure 10 will not exceed 5 mm, which would cause the weak magnetic area to be too large, thereby ensuring the waveform of the magnetic ring 20, so that the motor 1 matched therewith runs smoothly and has reliable and stable performance.

[0037] Among them, the distance a that the magnetic ring 20 extends into the end cover structure 10 can be set to be no less than 4 mm, for example, it can be 4 mm, 4.5 mm or 5 mm, to ensure that the magnetic ring 20 and the end cover structure 10 have sufficient plug-in distance and ensure the connection stability between the magnetic ring 20 and the end cover structure 10.

[0038] In the axial direction of the fan, the ratio of the size of the area of ​​the magnetic ring 20 that directly faces the motor 1 to the size of the entire magnetic ring 20 can be 0.8-0.9, that is, Figure 2 As shown, the b / n ratio is 0.8 to 0.9, and can be, for example, 0.8, 0.85, 0.87, 0.89, or 0.9. Setting the b / n ratio to 0.8 to 0.9 ensures a sufficient proportion of effective magnetic field area, ensuring effective coordination between the magnetic ring 20 and the motor 1, and ensuring motor performance. In one embodiment, the value of b can be 20 mm, and the value of n can be 23 mm.

[0039] Reference Figure 5 The magnetic ring 20 may include a ring body 21 and a plug-in ring 22, wherein the plug-in ring 22 extends axially at one end of the ring body 21. Figure 6 The end cap structure 10 may be formed with a plug-in slot 102, which may be formed on the main body 11 or the split member 12 described below, and the plug-in ring 22 may be plugged into the plug-in slot 102. The wall thickness of the plug-in ring 22 may be smaller than that of the ring body 21 to reduce the plug-in area, reduce the weak magnetic field area, and ensure motor performance.

[0040] Reference Figure 5 The magnetic ring 20 may include a positioning protrusion 23, which protrudes radially from the plug-in ring 22. The positioning protrusion 23 may protrude radially inward or radially outward. Figure 6 A positioning groove 103 may be formed on the end cover structure 10 to match and accommodate the positioning protrusion 23. The positioning protrusion 23 and the positioning groove 103 can limit the magnetic ring 20 and the end cover structure 10 in the circumferential direction to prevent relative rotation in the circumferential direction.

[0041] There may be multiple positioning protrusions 23 , and the multiple positioning protrusions 23 may be spaced apart in the circumferential direction of the plug-in ring 22 .

[0042] In the embodiment of the present disclosure, the end cover structure 10 may include a main body 11 and a split part 12 that are matched and connected, that is, the end cover structure 10 is split into multiple parts, so that the size of the end cover structure 10 can be ensured by multiple parts, thereby ensuring that the installation position of the magnetic ring 20 is more accurate.

[0043] When the end cap structure 10 includes a main body 11 and a split part 12 that are connected together, the wall thickness of the main body 11 and the wall thickness of the split part 12 along the radial direction of the fan can together constitute the wall thickness of the end cap structure 10. It can be understood that, referring to Figures 1 to 4The fan end cover assembly is a circumferentially surrounding disc-shaped structure, which has a circumferential wall 101 surrounding it. The magnetic ring 20 is inserted into the circumferential wall 101, and the wall thickness of the end cover structure 10 refers to the wall thickness of the circumferential wall 101. When the end cover structure 10 is not split, the circumferential wall 101 of the end cover structure 10 is too thick. During direct injection molding, due to the existence of the shrinkage rate, the circumferential wall 101 will shrink a lot, which will cause the wall thickness of the circumferential wall 101 to be uneven, resulting in the installation position of the magnetic ring 20 not being accurate enough, resulting in the fan and the motor not having consistent coaxiality, and thus causing bad noise during use. In the embodiment of the present disclosure, the end cover structure 10 is split into multiple parts, including a main body 11 and a split part 12, so that it is composed of multiple wall thicknesses in the wall thickness direction of the circumferential wall 101 to avoid shrinkage caused by excessive material thickness, thereby ensuring the installation accuracy of the magnetic ring 20 and the motor and avoiding bad noise.

[0044] In order to ensure the reliability of the connection between the main body 11 and the split part 12, the depth of the insertion between the main body 11 and the split part 12 along the axial direction of the fan can be set to be no less than 2.7 mm. Figure 2 As shown, the distance c is not less than 2.7 mm, for example, it can be 2.7 mm, 2.75 mm or 3.75 mm.

[0045] In order to avoid the main part 11 and the split part 12 being inserted too deeply, resulting in the remaining area being too small and affecting the structural strength, in the embodiment of the present disclosure, the insertion depth of the main part 11 and the split part 12 along the axial direction of the fan is set to no more than 3.8 mm, for example, it can be 2.7 mm, 2.75 mm, 3.5 mm, 3.75 mm or 3.8 mm.

[0046] In the embodiment of the present disclosure, the main body 11 is used to connect to the end side of the fan, and the main body 11 and the split part 12 can be arranged in various directions. Figure 1 and Figure 3 In the embodiment shown, the split part 12 can be arranged on the side of the main part 11 facing away from the fan. In this embodiment, the magnetic ring 20 can be plugged into the split part 12. Figure 4 In the embodiment shown, the split piece 12 can be arranged on the side of the main body 11 facing the fan. In this embodiment, the magnetic ring 20 can be plugged into the main body 11. When the magnetic ring 20 is plugged into the split piece 12, the magnetic ring 20 can be plugged into the main body 11. Figure 5 The magnetic ring 20 and Figure 6 The split parts 12 are injection molded into one piece, and then Figure 7As shown, the split member 12, equipped with the magnetic ring 20, is plugged into the main member 11. After the two are plugged in, ultrasonic welding can be performed in all directions in the plug-in area. Compared to bonding or screwing, ultrasonic welding can ensure the thickness of the main member 11 and the split member 12, avoiding uneven thickness caused by the presence of an adhesive layer and localized compression caused by screwing pressure, which affects thickness.

[0047] As mentioned above, the end cap structure 10 includes a circumferential wall 101 surrounding the circumference, and the magnetic ring 20 is inserted into the circumferential wall 101. Figure 3 and Figure 4 In the embodiment shown, the outer wall surface of the circumferential wall 101 can be the outer wall surface of the main body 11, that is, the inner circle of the end cover structure 10 is split. Figure 1 and Figure 2 The outer wall surface of the circumferential wall 101 can be the outer wall surface of the split piece 12, that is, the outer circle of the end cover structure 10 is split.

[0048] In the embodiment of the present disclosure, the number of split parts 12 can be at least one, such as the one shown in the figure, or it can be set to two or three according to the wall thickness of the circumferential wall 101. Multiple split parts 12 can be plugged into the main part 11 in sequence in the radial direction, or the split parts 12 can be plugged into each other.

[0049] Reference Figures 2 to 4 , the circumferential wall 101 may include a main wall 1011 and an extension wall 1012. When the end cover structure 10 includes a main body 11 and a split part 12, the main wall 1011 may be composed of the main body 11 and the split part 12, and the extension wall 1012 may be composed of one of the main body 11 and the split part 12. The magnetic ring 20 is plugged into the main wall 1011, and the extension wall 1012 extends axially from the main wall 1011 toward the side away from the wind turbine. The extension wall 1012 is radially spaced and located on the outer periphery of the magnetic ring 20. After the motor is placed in place, its mounting seat will be placed on the outer periphery of the magnetic ring 20. The area radially spaced apart from the extension wall 1012 and the magnetic ring 20 can be used to accommodate the mounting seat. The extension wall 1012 can play a dustproof role to protect the mounting seat.

[0050] In the disclosed embodiment, the wall thickness of the circumferential wall 101 may be 1.5 to 3 mm, for example, 1.5 mm, 2 mm or 3 mm, to ensure that the circumferential wall 101 has sufficient installation strength and is not easily broken, and to ensure that the magnetic ring 20 is firmly installed.

[0051] When the end cover structure 10 includes a main body 11 and a split part 12, the wall thickness of the main body 11 and the split part 12 can be 1.5~3mm respectively, to ensure that the main body 11 and the split part 12 have sufficient wall thickness during molding and are not easy to break, and to ensure that there is less shrinkage during molding to ensure the accurate installation position of the magnetic ring 20.

[0052] According to a second aspect of an embodiment of the present disclosure, a fan assembly is provided, comprising a fan (not shown), a motor 1, and the aforementioned fan end cap assembly. The fan and motor 1 are disposed on either side of the fan end cap assembly and connected by a rotating shaft 30. A magnetic ring 20 is disposed radially outward of the motor. This fan assembly has all the advantages of the aforementioned fan end cap assembly and will not be further elaborated here.

[0053] According to a third aspect of an embodiment of the present disclosure, an air-conditioning indoor unit is provided, which includes the above-mentioned fan assembly and has all the beneficial effects of the above-mentioned fan assembly, which will not be repeated here.

[0054] In the foregoing detailed description, reference is made to the accompanying drawings, which illustrate, by way of illustration, specific aspects of the present disclosure in which it may be practiced. In this regard, terms indicating directions or expressing positional relationships, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., may be used with reference to the orientation of the figures being described. Since the components of the described devices may be positioned in a plurality of different orientations, the directional terms may be used for illustrative purposes rather than restrictive. It should be understood that other aspects may be utilized and structural or logical changes may be made without departing from the concepts of the present disclosure. Therefore, the following detailed description should not be taken in a limiting sense.

[0055] It should be understood that, unless otherwise specifically noted, the features of the various embodiments of the present disclosure described herein may be combined with each other. As used herein, the term "and / or" includes any one of the relevant listed items and any combination of any two or more thereof; similarly, "at least one of" includes any one of the relevant listed items and any combination of any two or more thereof.

[0056] It should be understood that, unless otherwise expressly specified or limited, the terms "join," "attach," "install," "connect," "connect," "fix," etc. used in the embodiments of the present disclosure should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected, electrically connected, or communicable with each other; they can be directly connected, or indirectly connected through an intermediate medium, and they can be internally connected between two elements or an interactive relationship between two elements, unless otherwise expressly limited. For those skilled in the art, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0057] Additionally, the term "over" as used in reference to a component, element, or material layer being formed "over" or located "over" a surface may be used herein to mean that the component, element, or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are disposed between the surface and the component, element, or material layer. However, the term "over" as used in reference to a component, element, or material layer being formed "over" or located "over" a surface may alternatively have a specific meaning: the component, element, or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, e.g., in direct contact with the surface.

[0058] Although terms such as "first", "second" and "third" may be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, part, region, layer or section from another component, part, region, layer or section. Therefore, without departing from the teachings of each example, the first component, part, region, layer or section mentioned in the examples described herein may also be referred to as the second component, part, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one such feature. In the description herein, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0059] It should be understood that spatially relative terms, such as "above," "upper," "below," and "lower," are used herein to describe the relationship of one element to another element shown in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being "above" or "upper" relative to another element would then be "below" or "lower" relative to the other element. Thus, the term "above" encompasses both above and below orientations, depending on the spatial orientation of the device. The device may be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

[0060] Furthermore, the word "exemplary" is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be construed as advantageous over other aspects or designs. Rather, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or." That is, unless otherwise specified or clear from the context, "X applies to A or B" is intended to mean any of the natural inclusive permutations. That is, if X applies to A; X applies to B; or X applies to both A and B, then "X applies to A or B" satisfies any of the aforementioned instances. Furthermore, the articles "a" and "an," as used in this application and the appended claims, are generally understood to mean "one or more," unless otherwise specified or clear from the context to refer to the singular form.

[0061] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. With particular regard to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if not structurally equivalent to the disclosed structure. In addition, although particular features of the present disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and advantageous for any given or particular application. Furthermore, to the extent that the terms "include," "have," "have," "have," or variations thereof are used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term "comprising."

[0062] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

[0063] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A fan end cover assembly, characterized in that: include: An end cover structure, used for connection to the end side of the fan; as well as A magnetic ring is plugged into and matched with the end cover structure on a side of the end cover structure facing away from the fan, wherein the magnetic ring extends into the end cover structure by no more than 5 mm.

2. The fan end cover assembly according to claim 1, characterized in that: The distance that the magnetic ring extends into the end cover structure is not less than 4 mm.

3. The fan end cover assembly according to claim 1, characterized in that: The end cover structure includes a main body and a split part that are matched and connected. In the radial direction of the fan, the wall thickness of the main body and the wall thickness of the split part together constitute the wall thickness of the end cover structure, and the number of the split part is at least one.

4. The fan end cover assembly according to claim 3, characterized in that: In the axial direction of the fan, the insertion depth of the main body and the split part is not less than 2.7 mm.

5. The fan end cover assembly according to claim 4, characterized in that: In the axial direction of the fan, the insertion depth of the main body and the split part is no more than 3.8 mm.

6. The fan end cover assembly according to claim 3, characterized in that: The main body is used to connect to the end side of the fan, the split part is arranged on the side of the main body facing the fan, and the magnetic ring is plugged into the main body, or the split part is arranged on the side of the main body facing away from the fan, and the magnetic ring is plugged into the split part.

7. The fan end cover assembly according to claim 1, characterized in that: The end cover structure includes a circumferential wall surrounding the circumference, and the magnetic ring is inserted into the circumferential wall.

8. The fan end cover assembly according to claim 7, characterized in that: The circumferential wall includes a main wall and an extension wall. The magnetic ring is plugged into the main wall. The extension wall axially extends from the main wall toward a side away from the fan. The extension wall is radially spaced and located on the outer periphery of the magnetic ring.

9. The fan end cover assembly according to claim 7, characterized in that: The end cover structure includes a main body and a split part that are matched and connected. The outer wall surface of the circumferential wall is the outer wall surface of the main body, or the outer wall surface of the circumferential wall is the outer wall surface of the split part.

10. The fan end cover assembly according to any one of claims 1 to 9, characterized in that: The end cover structure includes a circumferential wall surrounding the circumference, the magnetic ring is plugged into the circumferential wall, and the wall thickness of the circumferential wall is 1.5-3 mm.

11. The fan end cover assembly according to claim 10, characterized in that: The end cover structure includes a main body and a split part that are matched and connected. In the radial direction of the fan, the wall thickness of the main body and the wall thickness of the split part together constitute the wall thickness of the circumferential wall. The wall thicknesses of the main body and the split part are 1.5~3mm respectively.

12. The fan end cover assembly according to claim 1, characterized in that: In the axial direction of the fan, the ratio of the size of the area of ​​the magnetic ring directly facing the motor to the size of the entire magnetic ring is 0.8-0.

9.

13. The fan end cover assembly according to claim 1, characterized in that: The magnetic ring includes a ring body and a plug-in ring, the plug-in ring extends axially at one end of the ring body, a plug-in groove is formed on the end cover structure, the plug-in ring is plugged into the plug-in groove, and the wall thickness of the plug-in ring is smaller than the wall thickness of the ring body.

14. The fan end cover assembly according to claim 13, characterized in that: The magnetic ring includes a positioning protrusion, which radially protrudes from the plug-in ring. A positioning groove is formed on the end cover structure to match and accommodate the positioning protrusion.

15. The fan end cover assembly according to claim 14, characterized in that: There are multiple positioning protrusions, and the multiple positioning protrusions are spaced apart in the circumferential direction of the plug-in ring.

16. A fan assembly, characterized in that: It comprises a fan, a motor and a fan end cover assembly according to any one of claims 1-15, wherein the fan and the motor are arranged on both sides of the fan end cover assembly and are connected by a rotating shaft, and the magnetic ring is arranged on the radial outside of the motor.

17. An air conditioner indoor unit, characterized in that: Comprising the fan assembly according to claim 16.

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