Impeller of fan and fan

Abstract

The utility model discloses an impeller of a fan and the fan, the impeller of the fan comprises a first end plate, a second end plate and a plurality of blades, the first end plate is provided with an air inlet; the second end plate and the first end plate are spaced and oppositely arranged; the multiple blades are distributed in the circumferential direction of the impeller, and at least one part of each blade is connected between the first end plate and the second end plate. The first surface of the second end plate is provided with a plurality of first protruding parts and second protruding parts in the circumferential direction of the impeller, the second protruding parts are arranged between the adjacent first protruding parts, and the protruding height of the second protruding parts is smaller than or equal to that of the first protruding parts. According to the impeller of the draught fan, the multiple first protruding parts can improve the assembly precision and the connection reliability of the draught fan, the second protruding parts can reduce the gap between the second end plate of the impeller and the motor installation face, airflow leakage is reduced, and the efficiency of the draught fan is improved.

Description

Technical Field

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

[0002] The fan drives the impeller to rotate through the motor to achieve gas inhalation, acceleration and discharge. The motor provides power for the fan to drive the impeller to rotate. The impeller is the core component of the fan, and its design directly affects the performance of the fan. In the related art, a positioning structure is set between the impeller and the mounting surface of the motor, but the existence of the positioning structure will cause a leakage gap to form between the impeller and the mounting surface of the motor, causing airflow leakage and affecting the efficiency of the fan. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide an impeller with a fan, which has high structural strength and can improve the efficiency of the fan.

[0004] Another object of the present invention is to provide a fan, comprising the aforementioned impeller.

[0005] The impeller of the fan according to the embodiment of the utility model comprises: a first end plate, a second end plate and a plurality of blades, wherein the first end plate is provided with an air inlet; the second end plate is spaced apart from and arranged relative to the first end plate; the plurality of blades are distributed along the circumference of the impeller, and at least a part of the blades are connected between the first end plate and the second end plate; wherein the first surface of the second end plate is provided with a plurality of first protrusions and second protrusions along the circumference of the impeller, the second protrusions are provided between adjacent first protrusions, and the protrusion height of the second protrusions is less than or equal to the protrusion height of the first protrusions.

[0006] According to the impeller of the fan in the embodiment of the utility model, by arranging multiple first protrusions on the second end plate, the structural strength of the second end plate is improved, and the assembly accuracy and connection reliability of the fan can be improved. The second protrusions are arranged between adjacent first protrusions, which can further improve the structural strength of the second end plate, improve the bearing capacity and deformation resistance of the second end plate, and can reduce the gap between the second end plate of the impeller and the motor mounting surface, reduce airflow leakage, and improve the efficiency of the fan.

[0007] In addition, the impeller of the fan according to the above embodiment of the utility model may also have the following additional technical features:

[0008] In some embodiments, the protrusion height of the first protrusion is H1, and the protrusion height of the second protrusion is H2, wherein 50%≤H2 / H1≤80%.

[0009] In some embodiments, the second protrusion is connected to the adjacent first protrusion; or, the second protrusion is spaced apart from the adjacent first protrusion; or, the second protrusion is configured as a long strip extending along the circumferential direction.

[0010] In some embodiments, a dimension of the second protrusion along the radial direction is smaller than a dimension of the first protrusion along the radial direction.

[0011] In some embodiments, the protrusion height of the first protrusion is greater than or equal to 0.5 mm.

[0012] In some embodiments, a positioning hole is provided on the first protrusion, and the positioning hole passes through the second end plate.

[0013] In some embodiments, the second end plate includes a first plate portion and a second plate portion, the first plate portion is configured in a ring shape, the second plate portion is disposed around the first plate portion, and the first protrusion and the second protrusion are distributed on the first plate portion along the circumferential direction.

[0014] In some embodiments, the first protrusion and the second protrusion are arranged on the first surface of the first plate portion facing the first end plate; or, the first protrusion and the second protrusion are arranged on the first surface of the first plate portion facing away from the first end plate; or, the second plate portion is configured to expand outward in a direction from the first end plate to the second end plate.

[0015] In some embodiments, the second end plate is provided with a mounting opening, and the plurality of first protrusions and the second protrusions surround the mounting opening.

[0016] In some embodiments, a recess is disposed on the second surface of the second end plate, and the recess is opposite to the first protrusion and the second protrusion along the thickness direction of the second end plate.

[0017] The fan according to the embodiment of the utility model comprises: a motor and the impeller of the aforementioned fan, wherein the motor is connected to the second end plate.

[0018] In some embodiments, the motor is provided with a support foot, and the support foot is provided on the second end plate and supported on the first protrusion.

[0019] In some embodiments, the motor is an outer rotor motor.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the impeller of some embodiments of the utility model.

[0022] Figure 2 It is a schematic diagram of the impeller of some embodiments of the utility model from another angle.

[0023] Figure 3 Schematic diagrams of impellers in other embodiments of the utility model.

[0024] Figure 4 It is a schematic cross-sectional view of an impeller according to an embodiment of the utility model.

[0025] Figure 5 yes Figure 4 Enlarged schematic diagram of the center circle A.

[0026] Figure 6 It is a schematic diagram of a fan according to some embodiments of the utility model.

[0027] Figure 7 It is a partial schematic diagram of a fan in some embodiments of the utility model.

[0028] Figure 8 yes Figure 7 Enlarged schematic diagram of the center circle B.

[0029] Reference numerals:

[0030] Impeller 100, first end plate 10, air inlet 11, second end plate 20, first surface 20a, second surface 20b, first plate portion 21, first protrusion 211, positioning hole 2111, second protrusion 212, second plate portion 22, mounting port 23, first recessed portion 241, second recessed portion 242, blade 30, motor 200, support foot 210. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] Combination Figure 1According to the impeller 100 of the embodiment of the utility model, it can be applied to a fan. The impeller 100 includes a first end plate 10, a second end plate 20 and a plurality of blades 30. The first end plate 10 is provided with an air inlet 11, and the air inlet 11 can guide the airflow into the impeller 100. The second end plate 20 is spaced apart from and arranged relatively to the first end plate 10. The plurality of blades 30 are distributed along the circumference of the impeller 100, and at least a portion of the blades 30 are connected between the first end plate 10 and the second end plate 20. In other words, all of the blades 30 can be connected between the first end plate 10 and the second end plate 20, or a portion of the blades 30 are connected between the first end plate 10 and the second end plate 20. Specifically, the first end plate 10 and the second end plate 20 can be arranged at intervals along the air intake direction of the impeller 100, and a plurality of blades 30 are distributed at intervals along the circumference of the impeller 100, and the blades 30 connect the first end plate 10 and the second end plate 20, and the first end plate 10 and the second end plate 20 provide support for the blades 30, thereby improving the rigidity and strength of the blades 30.

[0033] Among them, the first surface 20a of the second end plate 20 is provided with a plurality of first protrusions 211 along the circumference of the impeller 100. The plurality of first protrusions 211 can increase the structural strength of the second end plate 20, and the plurality of first protrusions 211 can be used as positioning points and fastening points. Specifically, the fan may include an impeller 100 and a motor 200. The impeller 100 may be connected to the motor 200 through the second end plate 20. The plurality of first protrusions 211 may be used as positioning points and fastening points during assembly of the impeller 100 and the motor 200, thereby ensuring that the second end plate 20 is aligned with the motor 200 and improving assembly accuracy and connection reliability.

[0034] The impeller 100 can be fixed to the motor 200 via the second end plate 20. The motor 200 can be an outer rotor motor, an inner rotor motor, etc. The installation and positioning of the motor 200 and the impeller 100 can be reliable by providing a plurality of first protrusions 211.

[0035] The first surface 20a of the second end plate 20 may also be provided with a second convex portion 212, which is provided between adjacent first convex portions 211. The second convex portion 212 can further improve the structural strength of the second end plate 20, and the convex height of the second convex portion 212 is less than or equal to the convex height of the first convex portion 211. In other words, the convex heights of the first convex portion 211 and the second convex portion 212 are the same or have a height difference. It can be understood that when the second end plate 20 is assembled with the motor 200, the first convex portion 211 will cause a gap between the second end plate 20 and the mounting surface of the motor 200, causing airflow leakage and affecting aerodynamic efficiency. By providing the second convex portion 212 between adjacent first convex portions 211, and the convex height of the second convex portion 212 is not greater than the convex height of the first convex portion 211, the second convex portion 212 can reduce the leakage gap between the second end plate 20 and the mounting surface of the motor 200, reduce airflow leakage, and thus reduce aerodynamic efficiency loss, thereby improving the efficiency of the fan.

[0036] According to the impeller 100 of the fan in the embodiment of the utility model, by arranging multiple first protrusions 211 on the second end plate 20, the structural strength of the second end plate 20 is improved, and the assembly accuracy and connection reliability of the fan can be improved. The second protrusions 212 are arranged between adjacent first protrusions 211, which can further improve the structural strength of the second end plate 20, improve the bearing capacity and deformation resistance of the second end plate 20, and can reduce the gap between the second end plate 20 of the impeller 100 and the mounting surface of the motor 200, reduce the leakage of airflow, increase the air volume, and thus improve the efficiency of the fan.

[0037] Among them, the first surface 20a of the second end plate 20 is provided with a plurality of first protrusions 211 and second protrusions 212 along the circumference of the impeller 100. The first surface 20a of the second end plate 20 can cooperate with the mounting surface of the motor 200. The first surface 20a can be the side of the second end plate 20 facing the first end plate 10, or it can be the side of the second end plate 20 facing away from the first end plate 10, and can be specifically adjusted according to the installation position of the motor 200.

[0038] Taking the motor 200 as an external rotor motor 200 as an example, the second end plate 20 may be provided with an installation opening 23 in the middle portion, and the motor 200 may be installed from the installation opening 23, and the flange surface of the motor 200 or the support foot 210 of the motor 200 may cooperate with the first surface 20a of the second end plate 20, wherein the first surface 20a may be a side of the second end plate 20 facing the first end plate 10, or a side of the second end plate 20 facing away from the first end plate 10, in other words, the motor 200 may be installed from different sides of the second end plate 20, and may be specifically adjusted according to the model and specifications of the motor 200, and the present application does not limit the specific position of the first surface 20a of the second end plate 20.

[0039] In addition, the protrusion height of the second protrusion 212 can be less than or equal to the protrusion height of the first protrusion 211. When the protrusion height of the first protrusion 211 is equal to the protrusion height of the second protrusion 212, the shapes of the first protrusion 211 and the second protrusion 212 may be different, so as to facilitate the rapid positioning and installation of the impeller 100 and the motor 200 through the first protrusion 211.

[0040] The second convex portion 212 can be set to different structures. For example, the second convex portion 212 can be a solid structure, which can improve the structural strength of the second end plate 20. For another example, the second convex portion 212 can also be set to a hollow structure. In other words, the position where the second surface 20b of the second end plate 20 and the second convex portion 212 are opposite to each other in the thickness direction can be recessed. By setting the second convex portion 212 to a hollow structure, the weight of the second end plate 20 can be reduced and the structural strength of the second end plate 20 can be improved. The second end plate 20 can be formed by stamping or injection molding.

[0041] The second protrusion 212 can also be set to different shapes. For example, the second protrusion 212 can be a long strip extending along the circumferential direction, a circle, a square, an irregular shape, etc., all of which can reduce the leakage gap between the second end plate 20 and the mounting surface of the motor 200.

[0042] The second convex portion 212 may be connected to the first convex portion 211, or may be disconnected from the first convex portion 211. Alternatively, one end of the second convex portion 212 may be connected to the first convex portion 211, and the other end may be disconnected from the first convex portion 211. The configuration may be adjusted according to the rotation speed and flow rate of different fans.

[0043] Furthermore, combined with Figure 4 and Figure 5 , the protrusion height of the first protrusion 211 is H1, and the protrusion height of the second protrusion 212 is H2, wherein 50%≤H2 / H1≤80%. By designing H2 / H1 within a reasonable range, in other words, the protrusion heights of the first protrusion 211 and the second protrusion 212 have a certain height difference, which facilitates the rapid positioning and installation of the motor 200 and the impeller 100 through the first protrusion 211. After the impeller 100 and the motor 200 are installed, the second protrusion 212 can effectively reduce the leakage gap between the impeller 100 and the motor 200 installation surface, reduce the leakage, and thus increase the air volume, especially under the condition of low flow and large pressure difference, it can improve the efficiency of the impeller 100, thereby improving the working efficiency of the fan. For example, H2 / H1 can be 50%, 55%, 60%, 65%, 70%, 75%, 80%, etc.

[0044] It should be noted that, combined with Figure 5The protruding heights of the first protrusion 211 and the second protrusion 212 are heights of the first protrusion 211 and the second protrusion 212 relative to the non-protruding portion of the first surface 20 a of the second end plate 20 .

[0045] In some embodiments of the present invention, the protrusion height of the first protrusion 211 is greater than or equal to 0.5 mm. The first protrusion 211, as a local reinforcement area, can effectively improve the support effect of the second end plate 20, and facilitate the rapid positioning and installation of the motor 200 and the impeller 100 through the first protrusion 211. For example, the protrusion height of the first protrusion 211 can be 0.5 mm, 0.6 mm, 0.8 mm, etc.

[0046] Combination Figure 2 In some embodiments of the utility model, the second protrusion 212 is connected to the adjacent first protrusion 211. By connecting the second protrusion 212 to the first protrusion 211, the cooperation between the first protrusion 211 and the second protrusion 212 can further improve the structural strength of the second end plate 20, improve the bearing capacity of the second end plate 20, and thus improve the structural stability of the impeller 100; in addition, the first protrusion 211 and the second protrusion 212 are arranged along the circumference of the impeller 100. It can be understood that the first protrusion 211 creates a gap between the second end plate 20 and the mounting surface of the motor 200. By connecting the second protrusion 212 to the first protrusion 211, the leakage gap between the second end plate 20 and the mounting surface of the motor 200 can be minimized to the greatest extent, thereby reducing the leakage of airflow.

[0047] Furthermore, combined with Figure 2 The portion where the first protrusion 211 and the second protrusion 212 are connected is connected through an arc transition, which can reduce the stress concentration at the portion where the first protrusion 211 and the second protrusion 212 are connected, and enhance the structural stability of the second end plate 20.

[0048] Combination Figure 3 In some embodiments of the utility model, the second protrusion 212 is spaced apart from the adjacent first protrusion 211. In other words, there is a gap between the first protrusion 211 and the second protrusion 212, which can reduce the mutual influence between the first protrusion 211 and the second protrusion 212. Specifically, the mutual influence between the first protrusion 211 and the second protrusion 212 during the processing and forming process can be reduced, and the influence on the second protrusion 212 during the positioning and installation process of the first protrusion 211 and the motor 200 can also be reduced, thereby improving the stability of the second protrusion 212, and then effectively reducing the leakage gap between the second end plate 20 and the mounting surface of the motor 200 through the second protrusion 212.

[0049] In addition, the second convex portion 212 may have two opposite ends, wherein one end of the second convex portion 212 may be connected to the adjacent first convex portion 211 , and the other end of the second convex portion 212 may be spaced apart from the adjacent first convex portion 211 .

[0050] Combination Figure 2 and Figure 3 In some embodiments of the present invention, the second protrusion 212 is configured as a long strip extending along the circumferential direction, which can enhance the structural reinforcement effect of the second end plate 20 in the circumferential direction, and can reduce the leakage gap between the second end plate 20 and the mounting surface of the motor 200 in the circumferential direction.

[0051] For example, the first protrusion 211 can be a circular or elliptical boss, which can serve as a positioning point and installation point for fixing the motor 200 and enhance the support effect for the motor 200. The second protrusion 212 can be a long strip of ribs, which can enhance the structural strength of the second end plate 20 in the circumferential direction and reduce the leakage gap between the second end plate 20 and the mounting surface of the motor 200.

[0052] In some embodiments of the utility model, the size of the second protrusion 212 in the radial direction is smaller than the size of the first protrusion 211 in the radial direction. Specifically, the size of the first protrusion 211 in the radial direction is larger, which facilitates the positioning and fixing of the motor 200 by the first protrusion 211. After the motor 200 and the impeller 100 are installed, the motor 200 can be effectively supported by the first protrusion 211, thereby improving the structural stability of the fan during transportation and operation. The second protrusion 212 has a size difference with the first protrusion 211 in the radial direction. In other words, the second end plate 20 is provided with protrusions with different radial sizes at different positions, which can effectively improve the structural strength of the second end plate 20, and improve the bearing capacity and anti-deformation ability of the second end plate 20.

[0053] Combination Figure 2 and Figure 3 In some embodiments of the utility model, the size of the second protrusion 212 along the circumferential direction is greater than the size of the first protrusion 211 along the circumferential direction. In other words, in the circumferential direction, the size of the second protrusion 212 is larger, and the structural strength of the second end plate 20 can be enhanced in the circumferential direction through the second protrusion 212, and the leakage gap between the second end plate 20 and the mounting surface of the motor 200 can be effectively reduced through the second protrusion 212.

[0054] In some embodiments of the utility model, a positioning hole 2111 is provided on the first protrusion 211, and the positioning hole 2111 can pass through the second end plate 20. The installation of the impeller 100 and the motor 200 can be achieved through the positioning hole 2111. Specifically, the motor 200 can be pre-positioned by the first protrusion 211 first, and then the impeller 100 and the motor 200 can be fixed by fasteners passing through the positioning hole 2111, which can improve the installation efficiency of the impeller 100 and the motor 200 and the structural stability after installation.

[0055] Combination Figure 2 and Figure 4 In some embodiments of the present invention, the second end plate 20 includes a first plate portion 21 and a second plate portion 22. The first plate portion 21 is configured in an annular shape, the second plate portion 22 is arranged around the first plate portion 21, and the first convex portion 211 and the second convex portion 212 are distributed circumferentially on the first plate portion 21. Specifically, the motor 200 and the impeller 100 can be fixed by the first plate portion 21, and at least a portion of the plurality of blades 30 can be connected to the second plate portion 22. By providing the first plate portion 21 and the second plate portion 22, it is convenient to fix the motor 200 and the blades 30 by different plate portions, thereby improving the structural stability of the impeller 100.

[0056] Among them, combined Figure 4 The second plate portion 22 can be configured to expand outward in the direction from the first end plate 10 to the second end plate 20, and the air flow enters from the air inlet 11 of the first end plate 10. Such a configuration can reduce the air flow loss at the second plate portion 22 and improve the efficiency of the impeller 100.

[0057] In some embodiments of the utility model, the first protrusion 211 and the second protrusion 212 may be arranged on the first surface 20a of the first plate portion 21 facing the first end plate 10. Specifically, the motor 200 can be positioned and fixed from the first surface 20a, that is, the motor 200 can be positioned and fixed from the side of the first plate portion 21 facing the first end plate 10. The motor 200 can be positioned and fixed by the first protrusion 211. After the motor 200 is fixed, the second protrusion 212 can reduce the gap between the mounting surface of the motor 200 and the first surface 20a, reduce the leakage of airflow, and improve the efficiency of the impeller 100.

[0058] In some embodiments of the present invention, the first convex portion 211 and the second convex portion 212 may be provided on the first surface 20a of the first plate portion 21 away from the first end plate 10. Specifically, the motor 200 may be positioned and fixed from the first surface 20a, that is, the motor 200 may be positioned and fixed from the side of the first plate portion 21 away from the first end plate 10, and the motor 200 may be positioned and fixed by the first convex portion 211. After the motor 200 is fixed, the second convex portion 212 may reduce the gap between the mounting surface of the motor 200 and the first surface 20a, reduce the leakage of the airflow, and improve the efficiency of the impeller 100.

[0059] Combination Figure 2In some embodiments of the utility model, the second end plate 20 is provided with a mounting opening 23, and a plurality of first protrusions 211 surround the mounting opening 23. The mounting opening 23 may be provided in the middle of the second end plate 20, and the motor 200 may be installed from the mounting opening 23. For example, the motor 200 may be an outer rotor motor 200, and the motor 200 may be directly connected to the impeller 100, so that the fan has a compact structure and high transmission efficiency, thereby improving the working efficiency and reliability of the fan.

[0060] Combination Figure 5 In some embodiments of the present invention, a depression is provided on the second surface 20b of the second end plate 20, and the depression is opposite to the first convex portion 211 along the thickness direction of the second end plate 20, and the depression is opposite to the second convex portion 212 along the thickness direction of the second end plate 20. Specifically, the depression may include a first concave portion 241 and a second concave portion 242, and the second end plate 20 may be formed by stamping, and the first convex portion 211 and the second convex portion 212 may be formed by stamping. After the second end plate 20 is stamped, the first convex portion 211 and the first depression are opposite to each other in the thickness direction of the second end plate 20, and the second convex portion 212 and the second depression are opposite to each other in the thickness direction of the second end plate 20.

[0061] Recombination Figure 5 The depression depth of the first depression 241 may be H3, and the depression depth of the second depression 242 may be H4, wherein the depression depth H3 of the first depression 241 may be equal to the protrusion height H1 of the first protrusion 211, and the depression depth H4 of the second depression 242 may be equal to the protrusion height H2 of the second protrusion 212. Specifically, the first protrusion 211 and the second protrusion 212 may be formed on the first surface 20a of the second end plate 20 by stamping on the second surface 20b of the second end plate 20. Of course, the second end plate 20 may also be formed by injection molding. The first protrusion 211 and the second protrusion 212 can enhance the structural strength of the second end plate 20 without increasing the weight of the second end plate 20, and are also convenient for processing and molding of the second end plate 20.

[0062] It should be noted that, combined with Figure 5 The recessed depths of the first recessed portion 241 and the second recessed portion 242 are the depths of the first recessed portion 241 and the second recessed portion 242 relative to the non-recessed portion of the second surface 20 b of the second end plate 20 .

[0063] Combination Figure 6According to the embodiment of the utility model, the fan includes a motor 200 and the impeller 100, and the motor 200 can be connected to the second end plate 20, specifically, the motor 200 can be connected to the first surface 20a of the second end plate 20, and by providing a plurality of first protrusions on the first surface 20a of the second end plate 20, the installation efficiency of the motor 200 and the impeller 100 can be improved, and the installation accuracy of the motor 200 and the impeller 100 can be improved. Among them, the flange surface of the motor 200 can be opposite to the first surface 20a of the second end plate 20, or the motor 200 can include a support foot 210, and the support foot 210 can cooperate with the first surface 20a of the second end plate 20.

[0064] Combination Figure 7 and Figure 8 By setting the first protrusion 211, a gap is provided between the mounting surface of the motor 200 and the first surface 20a of the second end plate 20. By setting the second protrusion, the leakage gap between the mounting surface of the motor 200 and the first surface 20a of the second end plate 20 can be reduced, thereby reducing airflow leakage and improving the working efficiency of the fan.

[0065] Furthermore, combined with Figure 8 The motor 200 may be provided with a support foot 210 , and the support foot 210 may be arranged opposite to the second end plate 20 , and the support foot 210 is supported on the first protrusion 211 , thereby improving the installation efficiency and installation accuracy of the motor 200 and the impeller 100 .

[0066] In some embodiments of the present invention, the motor 200 is an outer rotor motor 200. Specifically, the fan can be a centrifugal fan. The outer rotor motor 200 may include a stator and a rotor arranged outside the stator. The motor 200 is fixed to the impeller 100 through the mounting port 23 of the second end plate 20. When the centrifugal fan is working, the outer rotor motor 200 drives the impeller 100 to rotate through the rotor. Compared with the inner rotor motor 200, which is connected to the impeller 100 through the rotating shaft, the structure of the fan is compact, and the outer rotor motor 200 directly drives the impeller 100 to rotate, thereby reducing energy loss and improving the efficiency of the fan.

[0067] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An impeller of a fan, characterized in that: include: A first end plate, wherein an air inlet is provided on the first end plate; a second end plate, the second end plate being spaced apart from and arranged opposite to the first end plate; a plurality of blades, wherein the plurality of blades are distributed along the circumference of the impeller, and at least a portion of the blades are connected between the first end plate and the second end plate; The first surface of the second end plate is provided with a plurality of first convex portions and second convex portions along the circumference of the impeller, the second convex portions are provided between adjacent first convex portions, and the convex height of the second convex portions is less than or equal to the convex height of the first convex portions.

2. The impeller of the fan according to claim 1, characterized in that: The protrusion height of the first protrusion is H1, and the protrusion height of the second protrusion is H2, wherein 50%≤H2 / H1≤80%.

3. The impeller of the fan according to claim 1, characterized in that: The second convex portion is connected to the adjacent first convex portion; or, the second convex portion is arranged at intervals from the adjacent first convex portion; or, the second convex portion is configured as a long strip extending along the circumferential direction.

4. The impeller of the fan according to claim 1, characterized in that: A dimension of the second protrusion along the radial direction is smaller than a dimension of the first protrusion along the radial direction.

5. The impeller of a fan according to any one of claims 1 to 4, characterized in that: The protrusion height of the first protrusion is greater than or equal to 0.5 mm.

6. The impeller of a fan according to any one of claims 1 to 4, characterized in that: The first protrusion is provided with a positioning hole, and the positioning hole passes through the second end plate.

7. The impeller of the fan according to claim 1, characterized in that: The second end plate includes a first plate portion and a second plate portion, the first plate portion is configured in a ring shape, the second plate portion is arranged around the first plate portion, and the first convex portion and the second convex portion are distributed on the first plate portion along the circumferential direction.

8. The impeller of the fan according to claim 7, characterized in that: The first protrusion and the second protrusion are arranged on the first surface of the first plate portion facing the first end plate; or, the first protrusion and the second protrusion are arranged on the first surface of the first plate portion facing away from the first end plate; or, the second plate portion is configured to expand outward in a direction from the first end plate to the second end plate.

9. The impeller of the fan according to claim 1, characterized in that: The second end plate is provided with a mounting opening, and the plurality of first protrusions and the second protrusions surround the mounting opening.

10. The impeller of the fan according to claim 1, characterized in that: A recess is provided on the second surface of the second end plate, and the recess is opposite to the first convex portion and the second convex portion along the thickness direction of the second end plate.

11. A fan, characterized in that: include: Motor; The impeller of the fan according to any one of claims 1 to 10, wherein the motor is connected to the second end plate.

12. The fan according to claim 11, characterized in that: The motor is provided with a support foot, and the support foot is arranged on the second end plate and supported on the first protrusion.

13. The fan according to claim 12, characterized in that: The motor is an outer rotor motor.

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