fan

Abstract

The embodiment of the present application provides a fan, which comprises: a cylindrical part configured to be able to rotate with a rotating axis as the center; an impeller part configured at the radial outer side of the cylindrical part; a magnet provided to the inner wall of the cylindrical part; a stator at least partially accommodated in the cylindrical part; a tower part supporting the stator; a wall part configured at the radial outer side of the tower part, at least part of the wall part and the cylindrical part coincide and form a labyrinth structure in the radial direction, the cylindrical part comprises at least one annular cylinder wall, the wall part comprises at least two annular walls configured concentrically, or the cylindrical part comprises at least two annular cylinder walls configured concentrically, and the wall part comprises at least one annular wall. Through the embodiment of the present application, foreign matters can be effectively prevented from entering the inside of the fan.

Description

Technical Field

[0001] This application relates to the field of electromechanical technology, and in particular to a fan. Background Technology

[0002] Fans are widely used in various devices, including but not limited to ovens. A fan typically consists of a fixed-side component and a rotating-side component assembled in a rotatable manner. The fixed-side component includes a motor located inside the fan that drives the rotating-side component to rotate, thereby causing gas flow and achieving the effect of exhausting gas.

[0003] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0004] The inventors of this application have discovered that, in the prior art, when a fan is in operation, foreign objects such as water vapor or dust can easily enter the fan from the assembly point between the fixed-side components and the rotating-side components, affecting the lifespan of components such as the motor inside the fan.

[0005] To address the above-mentioned problems or other similar issues, embodiments of this application provide a fan, the fan comprising:

[0006] The cylindrical section is configured to rotate about a rotation axis.

[0007] The impeller portion is disposed radially outside the cylindrical portion;

[0008] A magnet is disposed on the inner wall of the cylindrical portion;

[0009] The stator is at least partially housed within the cylindrical portion;

[0010] The tower section supports the stator;

[0011] A wall portion, located radially outward of the tower portion, overlaps with the cylindrical portion in a radially oriented view to form a labyrinthine structure.

[0012] The cylindrical portion includes at least one annular cylindrical wall, the wall portion including at least two annular walls arranged concentrically, or the cylindrical portion includes at least two annular cylindrical walls arranged concentrically, the wall portion including at least one annular wall.

[0013] In one or more embodiments, the cylindrical portion includes two concentrically arranged annular cylindrical walls, and the wall portion includes two concentrically arranged annular walls.

[0014] In one or more embodiments, both the wall portion and the tower portion extend axially, and the tower portion supports the stator inside the cylindrical portion.

[0015] In one or more embodiments, the dimension of the axially overlapping portion of the cylindrical portion and the wall portion is half or more of the axial dimension of the cylindrical portion or half or more of the axial dimension of the wall portion.

[0016] In one or more embodiments, the radial distance between the cylindrical portion and the wall portion is approximately equal to the radial dimension of the wall portion.

[0017] In one or more embodiments, the fan further includes:

[0018] A circuit board, which is electrically connected to the stator inside the cylindrical portion, and

[0019] A wire, which extends from the circuit board,

[0020] The wall portion has a cutout for the wire to pass through.

[0021] In one or more embodiments, the cut is axially closer to the bottom of the cylindrical portion than the circuit board.

[0022] In one or more embodiments, the end of the cut extends axially to the end of the wall portion, or the cut is a through hole that penetrates the wall portion radially and is closed around it.

[0023] In one or more embodiments, the cut is provided with a dirt-proof component, through which the wire passes.

[0024] In one or more embodiments, the impeller portion includes a plate portion and a fan blade disposed on one side of the plate portion, the plate portion extending radially away from the center of the cylindrical portion, and the plate portion having one or more ribs disposed on the top surface opposite to the side where the fan blade is disposed in the axial direction.

[0025] In one or more embodiments, the end of the wall portion has an inclined cut.

[0026] In one or more embodiments, the fan further includes a base, the tower and the wall are integrally resin molded, and the base is embedded in the tower.

[0027] One beneficial effect of the embodiments of this application is that: the cylindrical portion including at least one annular cylindrical wall and the wall portion including at least two annular walls form a labyrinth structure, or the cylindrical portion including at least two annular cylindrical walls and the wall portion including at least one annular wall form a labyrinth structure, which can effectively prevent foreign objects from entering the interior of the fan.

[0028] Specific embodiments of this application are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of this application can be adopted. It should be understood that the embodiments of this application are not limited in scope. Within the spirit and scope of the appended claims, embodiments of this application include many changes, modifications, and equivalents.

[0029] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0030] The elements and features described in one drawing or embodiment of this application may be combined with elements and features shown in one or more other drawings or embodiments. Furthermore, in the drawings, similar reference numerals denote corresponding parts in several drawings and can be used to indicate corresponding parts used in more than one embodiment.

[0031] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0032] Figure 1 This is a cross-sectional schematic diagram of a fan according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of an embodiment of the present application, including the tower section and the wall section;

[0034] Figure 3 This is a schematic diagram of an embodiment of the present application, including a cylindrical portion and an impeller portion;

[0035] Figure 4 yes Figure 3 A schematic diagram viewed from the other side of the axis;

[0036] Figure 5 This is a three-dimensional schematic diagram of a fan according to an embodiment of this application. Detailed Implementation

[0037] Referring to the accompanying drawings, the foregoing and other features of the embodiments of this application will become apparent from the following description. Specific implementations of the embodiments of this application are specifically disclosed in the following description and drawings, illustrating some implementations in which the principles of the embodiments of this application can be adopted. It should be understood that the embodiments of this application are not limited to the described implementations; rather, the embodiments of this application include all modifications, variations, and equivalents falling within the scope of the appended claims.

[0038] In embodiments of this application, the term "and / or" includes any one and all combinations of one or more of the terms listed in association. The terms "comprising," "including," "having," etc., refer to the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0039] In the embodiments of this application, the singular forms "a," "the," etc., may include the plural forms and should be broadly interpreted as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.

[0040] In the embodiments of this application, for ease of explanation, the central axis OO' of the fan or the direction parallel to it is referred to as "axial direction", the radial direction centered on the axis is referred to as "radial direction", and the direction around the axis is referred to as "circumferential direction". However, this is only for the convenience of explanation and does not limit the orientation of the fan during use and manufacturing.

[0041] Various embodiments of the present application will now be described with reference to the accompanying drawings. These embodiments are merely exemplary and are not intended to limit the scope of the present application.

[0042] This application provides a fan. Figure 1 This is a cross-sectional schematic diagram of a fan according to an embodiment of this application.

[0043] like Figure 1 As shown, the fan 1 includes a cylindrical section 2, an impeller section 3, a magnet 4, a stator 5, a tower section 6, and a wall section 7. The cylindrical section 2 is configured to be rotatable about a rotation axis OO'. The impeller section 3 is disposed radially outside the cylindrical section 2. The magnet 4 is disposed on the inner wall of the cylindrical section 2. The stator 5 is at least partially housed within the cylindrical section 2. The tower section 6 supports the stator 5. The wall section 7 is disposed radially outside the tower section 6. When viewed radially, at least a portion of the wall section 7 overlaps with the cylindrical section 2 to form a labyrinth structure.

[0044] In the embodiments of this application, the cylindrical portion 2 includes at least one annular cylindrical wall 21, and the wall portion 7 includes at least two annular walls 71 arranged concentrically; or, the cylindrical portion 2 includes at least two annular cylindrical walls 21 arranged concentrically, and the wall portion 7 includes at least one annular wall 71.

[0045] Thus, a cylindrical portion including at least one annular cylindrical wall and a wall portion including at least two annular walls form a labyrinth structure, or a cylindrical portion including at least two annular cylindrical walls and a wall portion including at least one annular wall form a labyrinth structure, wherein the formed labyrinth structure includes at least two axially extending paths, thereby extending the diffusion path of external foreign objects into the fan and effectively preventing foreign objects from entering the fan.

[0046] For example, in the prior art, a single-layer baffle formed on the rotating or fixed side component prevents foreign objects from entering the fan. However, such a single-layer baffle is difficult to form a labyrinth structure and has a short diffusion path, making it difficult to effectively prevent foreign objects from entering the fan. In the embodiments of this application, the fan forms a multi-labyrinth structure between the cylindrical part and the wall part, including at least two layers of axially extending paths, which can further improve the effect of preventing foreign objects from entering the fan.

[0047] In the embodiments of this application, the fan 1 also includes components that are common to general fans, which can be referred to in the prior art and are omitted here.

[0048] In the embodiments of this application, there is no limitation on the specific number of annular cylindrical walls included in the cylindrical part and the specific number of annular walls included in the wall part, as long as the sum of the number of annular cylindrical walls and the number of annular walls is at least 3 and they can form a maze structure when they cooperate with each other. The following example illustrates this.

[0049] Figure 2 This is a schematic diagram of an embodiment of the present application, including a tower section and a wall section, showing the structure from... Figure 1 The view observed from the O side along the axis is shown. Figure 3 This is a schematic diagram of an embodiment of the present application, including a cylindrical portion and an impeller portion, showing that from... Figure 1 The view observed from the O side along the axis is shown. Figure 4 yes Figure 3 The situation observed from the other side of the axis, namely the O' side.

[0050] like Figures 2 to 4 As shown, the fixed-side component may include Figure 2 The tower section 6 and wall section 7 shown, the rotating side components may include, for example, Figure 3 and Figure 4 The cylindrical section 2 and impeller section 3 are shown. In the... Figure 2 The fixed side component shown Figures 3 to 4When the rotating side components shown are assembled together, the cylindrical part 2 and the wall part 7 cooperate with each other to form a labyrinth structure, thereby preventing foreign objects from the outside of the fan from entering the inside of the fan and the inside of the cylindrical part 2, as will be described exemplarily below.

[0051] like Figure 1 and Figure 2 As shown, in one or more embodiments, the wall portion 7 includes two concentrically arranged annular walls 71, namely an annular wall 71a located radially inner and an annular wall 71b located radially outer, as... Figure 1 and Figure 4 As shown, the cylindrical portion 2 includes two concentrically arranged annular cylindrical walls 21, namely an annular cylindrical wall 21a located radially inner and an annular cylindrical wall 21b located radially outer. Thus, as... Figure 1 As shown, the two annular walls 71 and the two annular cylindrical walls 21 are interlocked to form a complex labyrinth structure. The annular cylindrical walls 21a, 71a, 21b and 71b are arranged in sequence from the radial inner side to the radial outer side. Thus, by forming a complex labyrinth structure, foreign objects on the impeller section 3 side can be effectively prevented from entering the interior of the fan 1.

[0052] In the embodiments of this application, Figure 2 An example of a labyrinth structure formed by the cylindrical portion 2 and the wall portion 7 is shown, but this application is not limited to this. For example, the cylindrical portion may include two annular cylindrical walls, and the wall portion 7 may include one annular wall. In this case, the annular wall portion is disposed between the two annular cylindrical walls to form a labyrinth structure. Another example is that the cylindrical portion includes three concentric annular cylindrical walls, and the wall portion 7 includes two annular walls, which are respectively located in the two intervals formed by the three annular cylindrical walls to form a labyrinth structure. And so on, which will not be described in detail here.

[0053] In the embodiments of this application, such as Figure 1 As shown, the cylindrical portion may include a cylindrical bottom and an annular cylindrical wall, the annular cylindrical wall extending axially from the surface of the cylindrical bottom facing the axial side O', and the wall portion may include a wall bottom and an annular wall, the annular wall extending axially from the surface of the wall bottom facing the axial side O.

[0054] In the embodiments of this application, when the cylindrical portion is provided with multiple annular cylindrical walls, the axial dimensions of the multiple annular cylindrical walls may be the same or different, and this application does not impose any restrictions on this. The axial dimension of the annular cylindrical wall can be the height of the annular cylindrical wall extending axially from the bottom of the cylinder. When the wall portion is provided with multiple annular walls, the axial dimensions of the multiple annular walls may be the same or different, and this application does not impose any restrictions on this. The axial dimension of the annular wall can be the dimension of the annular wall extending from the bottom of the wall.

[0055] For example, if the cylindrical part has one annular wall and the wall part has two annular walls, the axial dimension of the radially inner annular wall can be shorter than the axial dimension of the radially outer annular wall. In this way, when the annular wall is placed between the two annular walls, the shorter axial dimension of the radially inner annular wall will not interfere with the magnets placed on the inner circumference of the annular wall.

[0056] like Figure 2 As shown, in one or more embodiments, both the wall portion 7 and the tower portion 6 extend axially. In the embodiments of this application, as... Figure 1 As shown, the tower portion 6 supports the stator 5 inside the cylindrical portion 2. Thus, a labyrinth structure can be formed between the axially extending wall portion 7, i.e., the annular cylindrical wall 71, and the cylindrical portion 2 to prevent foreign objects from entering the fan interior. In this embodiment, the tower portion can support the stator 5 at the center of the cylindrical portion, or at other locations inside the cylindrical portion; this application does not impose any limitations on this.

[0057] In the embodiments of this application, such as Figure 1 As shown, the dimension of the overlapping portion of the cylindrical part 2 and the wall part 7 in the axial direction is h. In one or more embodiments, the dimension h of the overlapping portion is half or more of the axial dimension of the cylindrical part 2 or half or more of the axial dimension of the wall part 7. That is, the dimension h of the overlapping portion can be half or more than half of the axial dimension of the cylindrical part 2, or the dimension h of the overlapping portion can be half or more than half of the axial dimension of the wall part 7. The axial dimension of the cylindrical part 2 can be the axial dimension of the annular wall 21, and the axial dimension of the wall part 7 can be the axial dimension of the annular wall 71. This ensures the length of the diffusion path of the labyrinth structure formed between the cylindrical part and the wall part, thus ensuring a sealing effect. However, this application is not limited to this; the specific size of the dimension h of the overlapping portion can also be other values, as long as the length of the diffusion path of the labyrinth structure is ensured to guarantee a sealing effect.

[0058] In the embodiments of this application, such as Figure 1 As shown, the radial distance between the cylindrical portion 2 and the wall portion 7 is g, that is, the radial distance between the annular cylindrical wall 21 and the adjacent annular wall 71 is g. In one or more embodiments, the distance g between the cylindrical portion 2 and the wall portion 7 is approximately equal to the radial dimension of the wall portion, i.e., the thickness of the annular wall 71. "Approximately equal" should be understood as allowing a certain range of error due to process tolerances, etc. This ensures the clearance between the cylindrical portion and the wall portion to prevent interference between them during fan operation.

[0059] However, this application is not limited to this. The size of the gap g between the cylindrical part 2 and the wall part 7 can also be other values. For example, it can be not less than a first predetermined value to avoid interference. For example, the gap g between the annular cylindrical wall and the annular wall needs to be greater than the maximum displacement during rotation to avoid rubbing. Or, the gap g between the cylindrical part 2 and the wall part 7 is approximately equal to the thickness of the annular cylindrical wall 21. Or, the gap g between the cylindrical part 2 and the wall part 7 is not greater than a second predetermined value to ensure the sealing effect, etc. This application does not limit this and can be selected according to actual needs.

[0060] In the embodiments of this application, such as Figure 1 As shown, the fan 1 may also include a circuit board 8 and a wire 9. The circuit board 8 is electrically connected to the stator 5 inside the cylindrical part 2, and the wire 9 is led out from the circuit board 8.

[0061] Figure 5 This is a three-dimensional schematic diagram of a fan according to an embodiment of this application, showing a fan from... Figure 1 The situation observed from the O' side of the axis is shown.

[0062] like Figure 2 and Figure 5 As shown, in one or more embodiments, the wall portion 7 has a cutout 72 for the wire 9 to pass through. For example, the cutout 72 is formed on two annular walls 71. Thus, by providing the cutout 72 for leading out the wire 9, even if the cylindrical portion 2 and the wall portion 7 are interlocked to form a complex labyrinth structure during fan operation, the cylindrical portion 2, as a rotating component, will not interfere with the wire 9 led out from inside the fan when rotating.

[0063] In one or more embodiments, the cut is axially closer to the bottom of the cylindrical portion than the circuit board. Thus, as... Figure 1 As shown, the wire 9 leading from the circuit board 8 is first bent towards the axial direction O to exit through the cut, and after exiting through the cut, the wire 9 is bent towards the axial direction O' to exit to the outside of the fan, as shown. Figure 1 As shown, in this way, in fan 1 with Figure 1 When the orientation is set as shown, i.e., side O is vertically upward and side O' is vertically downward, the conductor 9 is convex upward, preventing external moisture from entering the fan along the conductor 9. Furthermore, even when the orientation is reversed, i.e., side O is vertically downward and side O' is vertically upward, the conductor 9 is concave downward, causing moisture on the conductor 9 to collect at the lowest point of the concave section of the conductor 9, preventing it from entering the fan. This further improves the sealing effect of the fan.

[0064] In this embodiment of the application, the specific shape of the cut 72 is not limited, for example, as Figure 2As shown, in one or more embodiments, the end of the cut 72 extends axially to the end of the wall portion 7, but this application is not limited to this. For example, the cut 72 may also be a through hole that penetrates the wall portion radially and is closed around it, that is, the cut 72 is only formed at the axial end O' of the wall portion 7. In this way, the sealing effect can be further improved by reducing the axial dimension of the cut.

[0065] In one or more embodiments, an anti-fouling component is provided at the cutout, through which the wire passes. This further improves the sealing effect. In the embodiments of this application, the specific implementation of the anti-fouling component is not limited; for example, it can be made of an elastic material, such as an elastic sealing ring or a through-hole structure with a sealing lip.

[0066] like Figure 1 and Figure 3 As shown, in one or more embodiments, the impeller portion 3 includes a plate portion 31 and a fan blade 32 disposed on one surface of the plate portion 31. The plate portion 31 extends radially away from the center of the cylindrical portion. The plate portion 31 has one or more ribs 33 on its top surface on the side opposite to where the fan blade is disposed in the axial direction. The top surface is the axial O-side surface of the plate portion 31. Therefore, by providing the ribs 33, the amount of material used in the fan can be reduced while ensuring the fan's strength, thus lowering costs.

[0067] In the embodiments of this application, the number of ribs 33 is not limited. For example, the number of ribs 33 is not the same as the number of fan blades 32 of impeller part 3, thereby suppressing resonance during the operation of the fan.

[0068] like Figure 1 and Figure 2 As shown, the end of the wall portion 7 has an inclined cut surface 7S. This facilitates the production and assembly of the fan. For example, the cut surface 7S facilitates the drafting process. At the same time, the cut surface 7S can increase the gap between adjacent annular walls 71 to facilitate the insertion of the annular cylinder wall 21. In addition, the cut surface 7S can act as a guide surface during the insertion of the annular cylinder wall 21. Furthermore, by setting the cut surface 7S to increase the gap between the annular walls 71, the heat dissipation of the fan can be facilitated.

[0069] In one or more embodiments, the tower section and the wall section are integrally molded from resin; in one or more embodiments, such as... Figure 1 and Figure 2 As shown, the fan 1 also includes a base 10, which is embedded in the tower 6. For example, the base 10 is made of metal. This facilitates the manufacture of the fan and allows for a certain degree of design freedom in both the base and the tower.

[0070] In this embodiment of the application, the fan 1 can be applied to, for example, an oven, but the application is not limited thereto; the fan 1 can also be applied to other devices.

[0071] According to the embodiments of this application, a cylindrical portion including at least one annular wall and a wall portion including at least two annular walls form a labyrinth structure, or a cylindrical portion including at least two annular walls and a wall portion including at least one annular wall form a labyrinth structure. In this way, the diffusion path of external foreign objects into the fan can be extended, and foreign objects can be effectively prevented from entering the fan.

[0072] It is worth noting that the above Figures 1 to 5 This application only illustrates the fan in the embodiment of the present application, but the application is not limited thereto. For details on the various structures or components, please refer to related technologies; furthermore, additional... Figures 1 to 5 Structures or components not shown, or reduced Figures 1 to 5 One or more structures or components in it. Figures 1 to 5 For any components or elements not specifically specified herein, please refer to relevant technologies; this application does not impose any limitations on them.

[0073] The embodiments of this application have been described above with reference to specific implementation methods. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make various modifications and variations to the embodiments of this application based on the spirit and principles of the embodiments, and these modifications and variations are also within the scope of the embodiments of this application.

[0074] Preferred embodiments of the present application have been described above with reference to the accompanying drawings. Many features and advantages of these embodiments are apparent from this detailed description, and therefore the appended claims are intended to cover all such features and advantages falling within the true spirit and scope of these embodiments. Furthermore, since many modifications and alterations will readily occur to those skilled in the art, the embodiments of the present application are not intended to be limited to the precise structures and operations illustrated and described, but rather to encompass all suitable modifications and equivalents falling within their scope.

Claims

1. A fan, characterized in that, The fan includes: The cylindrical section is configured to rotate about a rotation axis. The impeller portion is disposed radially outside the cylindrical portion; A magnet is disposed on the inner wall of the cylindrical portion; The stator is at least partially housed within the cylindrical portion; The tower section supports the stator; A wall portion, located radially outward of the tower portion, overlaps with the cylindrical portion in a radially oriented view to form a labyrinthine structure. The cylindrical portion includes at least one annular cylindrical wall, the wall portion including at least two annular walls arranged concentrically, or the cylindrical portion includes at least two annular cylindrical walls arranged concentrically, the wall portion including at least one annular wall.

2. The fan according to claim 1, characterized in that, The cylindrical portion includes two concentrically arranged annular cylindrical walls, and the wall portion includes two concentrically arranged annular walls.

3. The fan according to claim 1 or 2, characterized in that, Both the wall portion and the tower portion extend axially, and the tower portion supports the stator inside the cylindrical portion.

4. The fan according to claim 1, characterized in that, The axially overlapping portion of the cylindrical portion and the wall portion has a dimension that is half or more of the axial dimension of the cylindrical portion or half or more of the axial dimension of the wall portion.

5. The fan according to claim 1, characterized in that, In the radial direction, the interval between the cylindrical portion and the wall portion is approximately equal to the radial dimension of the wall portion.

6. The fan according to claim 1, characterized in that, The fan also includes: A circuit board, which is electrically connected to the stator inside the cylindrical portion, and A wire, which extends from the circuit board, The wall portion has a cutout for the wire to pass through.

7. The fan according to claim 6, characterized in that, In the axial direction, the cut is closer to the bottom of the cylindrical portion than the circuit board.

8. The fan according to claim 6, characterized in that, The end of the cut extends axially to the end of the wall portion, or the cut is a through hole that penetrates the wall portion radially and is closed around it.

9. The fan according to claim 6, characterized in that, A contamination-proof component is provided at the cut, and the wire passes through the contamination-proof component.

10. The fan according to claim 1, characterized in that, The impeller portion includes a plate portion and a fan blade disposed on one side of the plate portion. The plate portion extends radially away from the center of the cylindrical portion. The plate portion has one or more ribs disposed on the top surface opposite to the side where the fan blade is disposed in the axial direction.

11. The fan according to claim 1, characterized in that, The end of the wall portion has an inclined cut.

12. The fan according to claim 1, characterized in that, The fan also includes a base, the tower and the wall are integrally molded with resin, and the base is embedded in the tower.

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