Impeller and fan assembly

Abstract

The utility model provides an impeller and a fan assembly. The impeller comprises a hub which takes an axial direction as a rotation axis, extends from a first end to a second end, and comprises an end surface positioned at the first end of the hub; one end of the first wall extends towards the second end around the whole periphery of the end face, and the first wall comprises an inner peripheral surface facing the rotating axis and an outer peripheral surface deviating from the rotating axis; and a plurality of blades each having a proximal end including a blade root portion extending from an outer peripheral surface of the first wall, a plurality of spaces being formed between each blade root portion and the first wall, respectively; the through holes are formed in the interface between the first wall and the blade root, and each through hole communicates with the corresponding space; wherein a first preset angle is formed between the first wall and the axial direction, and the first preset angle is set to be between 5 degrees and 45 degrees; and wherein the second wall comprises a plurality of through holes.

Description

Technical Field

[0001] The present invention relates to the field of ventilation equipment structures. More specifically, the present invention relates to an impeller that is designed to better discharge foreign matter. The present invention also relates to a fan assembly that includes the above-mentioned impeller. Background Art

[0002] Vehicles typically include one or more ventilation devices, such as fans. The fan typically includes an impeller and a motor, and the impeller is driven by the motor. Under some operating conditions, foreign matter (such as gravel or water) may enter the gap between the impeller and the motor and may accumulate at the hub of the impeller. Such undesirable accumulation of foreign matter may lead to uneven mass distribution or increase the mass of the impeller, resulting in abnormal conditions such as shaking, wear or difficulty starting. When the fan is working, foreign matter may be located near the hub of the impeller and tend to gather radially outside the hub under the action of centrifugal force. Utility Model Content

[0003] One aspect of the present application is to provide an impeller that can effectively discharge foreign matter, such as sand or water. Another aspect of the present application is to provide a fan assembly that includes the above-mentioned impeller.

[0004] The purpose of this application is achieved through the following technical solutions:

[0005] An impeller comprising:

[0006] The hub has an axial direction as a rotation axis, extends from a first end to a second end, and includes:

[0007] an end surface positioned at the first end of the hub; and

[0008] A first wall, one end of which extends toward the second end around the entire periphery of the end surface and includes an inner peripheral surface facing toward the rotation axis and an outer peripheral surface facing away from the rotation axis;

[0009] a plurality of blades, wherein the proximal ends of the blades include blade roots, the blade roots extending from the outer peripheral surface of the first wall, and a plurality of spaces are respectively formed between each blade root and the first wall; and

[0010] a plurality of through holes, the through holes being arranged at the interface between the first wall and the blade root, and each through hole being in communication with each space;

[0011] A first predetermined angle is formed between the first wall and the axial direction, and the first predetermined angle is set between 5 degrees and 45 degrees.

[0012] In the above impeller, optionally, the blade root includes:

[0013] a reinforcing rib extending from an outer peripheral surface of the first wall; and

[0014] The inclined portion extends from a distal end of the reinforcing rib portion, extends along a rotation direction of the impeller, and is coupled to a portion of the first wall adjacent to the second end.

[0015] In the above impeller, optionally, one or more through holes are arranged on the slope portion of each blade root, close to the reinforcing rib portion, and arranged on the upstream side in the rotation direction of the impeller.

[0016] In the above impeller, optionally, the through hole is arranged at a portion of the sloped portion close to the second end, and extends through the sloped portion in a radial direction.

[0017] In the above impeller, optionally, outer surfaces of the reinforcing rib portion and the inclined portion are configured to be continuous and extend from a position close to the first end to a position close to the second end along the rotation direction of the impeller.

[0018] In the above impeller, optionally, the plurality of blade roots are arranged uniformly or non-uniformly in the circumferential direction, and the reinforcing rib portion of each blade root is spaced apart from the slope portion of an adjacent blade root.

[0019] In the above-mentioned impeller, optionally, the inclined portion includes an inner peripheral surface facing the first wall and an outer peripheral surface facing away from the first wall, the proximal end of the blade extends from the outer peripheral surface of the inclined portion, and the proximal end is positioned to be spaced apart from the top of the inclined portion and the end of the inclined portion close to the second end.

[0020] In the above-mentioned impeller, optionally, the shape of the space is constructed as follows: in the axial direction, the size of the space gradually decreases from the side close to the first end toward the side close to the second end, so as to be suitable for accommodating a part of the mold and enable the mold to be ejected from the space in the axial direction.

[0021] In the above impeller, optionally, the through hole is configured to have one of the following shapes: circle, part of a circle, part of a ring, ellipse, part of an ellipse, triangle, prism, rectangle, trapezoid, regular pentagon, regular hexagon or a combination thereof.

[0022] A fan assembly comprising:

[0023] the impeller mentioned above;

[0024] an electric motor comprising a rotor and a stator, wherein an end face of the impeller is attached to the rotor; and

[0025] A frame is provided to which the stator of the motor is attached and which is arranged around the distal ends of the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will appreciate that these drawings are drawn only for the purpose of illustrating the preferred embodiments and, therefore, should not be construed as limiting the scope of the present application. Furthermore, unless otherwise noted, the drawings are intended only to conceptually represent the composition or configuration of the depicted objects and may contain exaggerated illustrations. The drawings are not necessarily drawn to scale.

[0027] Figure 1 It is a three-dimensional view of an embodiment of the impeller of the present application.

[0028] Figure 2 yes Figure 1 An enlarged fragmentary view of the illustrated embodiment.

[0029] Figure 3 yes Figure 1 Another enlarged fragmentary view of the illustrated embodiment.

[0030] Figure 4 yes Figure 1 Another enlarged fragmentary view of the illustrated embodiment.

[0031] Figure 5 yes Figure 1 A partial cross-sectional view of the illustrated embodiment.

[0032] Figure 6 is an exploded view of one embodiment of a fan assembly of the present application.

[0033] Figure 7 yes Figure 6 A perspective view of the electric machine in the illustrated embodiment.

[0034] Figure 8 yes Figure 6 A perspective view of the illustrated embodiment after complete assembly. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present application.

[0036] First, it should be noted that directional terms such as top, bottom, upward, and downward, as used herein, are defined relative to the directions in the respective figures. These directions are relative and will vary depending on the position and state of the device. Therefore, these and other directional terms should not be construed as limiting.

[0037] In addition, it should be pointed out that for any single technical feature described or implied in the embodiments of this document or any single technical feature shown or implied in the accompanying drawings, these technical features (or their equivalents) can be further combined to obtain other embodiments not directly mentioned in this document.

[0038] It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.

[0039] Figures 1 to 5 Various aspects of an embodiment of an impeller 10 of the present application are shown. The impeller 10 may include: a hub 100, blades 200, and optionally a ring 300. Some of the figures illustrate directions defined herein. For example, the hub 100 may be rotated approximately in the axial direction AA. The axial direction AA is Figure 1 The plurality of blades 200 may extend generally in a radial direction RR. The radial direction is the direction pointed by a ray extending from the center of the circular contour of the hub 100 and in the plane or paper defined by the hub 100 and blades 200. The circumferential direction CC refers to the direction of a circle formed around the center of the circular contour of the hub 100, such as the direction in which the circular contour of the ring 300 extends.

[0040] like Figure 5 As shown, the hub 100 may have a certain thickness in the axial direction AA, for example, extending from the first end 101 to the second end 102. The hub 100 may include: an end surface 110, a first wall 120, and the like.

[0041] The end surface 110 can be positioned at the first end 101 of the wheel scraper 100 and can have a generally planar shape. In one embodiment, the end surface 110 can have a generally circular profile. The end surface 110 can have one or more first mounting holes 111 therein to facilitate attachment of the end surface 110 to the electrode rotor 500.

[0042] The first wall 120 may extend around the entire circumference of the end surface 110 toward the second end 102. Figure 5 As shown, the first wall 120 can form an annular wall structure, and the first wall 120 can form a first predetermined angle A1 with the axial direction AA. In one embodiment, the first predetermined angle A1 can be between 5 degrees and 45 degrees, for example, 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees or 45 degrees. The first wall 120 can have an inner peripheral surface and an outer peripheral surface. In the embodiment shown in the figure, the inner peripheral surface is the surface facing the side of the rotation axis, that is, Figure 5 The outer peripheral surface is the surface on the side away from the rotation axis, that is, Figure 5The right side surface in FIG. The inner circumferential surface and the outer circumferential surface may be substantially parallel to each other or may form a certain angle. It is easy to understand that the first predetermined angle A1 may be the angle between the inner circumferential surface and the axial direction AA, or the angle between the outer circumferential surface and the axial direction AA.

[0043] The blade 200 may include a proximal end 201, a distal end 202, and a blade root 210. In the illustrated embodiment, the proximal end 201 of the blade 200 may extend from the periphery of the hub 100, for example, from a sloped portion 212 of the blade root 210 along the radial direction RR. The distal end 202 of the blade 200 may be connected to the ring 300.

[0044] A plurality of blade roots 210 may be arranged on the outer peripheral surface of the first wall 120. Figures 2 to 4 As shown, the blade root portion 210 may include at least a rib portion 211 and a sloped portion 212. The rib portion 211 may be formed in the style of a rib and extend from the outer peripheral edge of the first wall 120. One end of the rib portion 211 may extend to a position close to the first end 101, and the other end may extend to the sloped portion 212. In one embodiment, the end surface of the rib portion 211 close to the first end 101 may be substantially parallel to the first end 101, or substantially parallel to the end surface 110. The rib portion 211 may have a curved shape, for example, it may extend on a smooth extension line of the outer contour of the blade 200, as shown in FIG. Figure 2 and Figure 3 shown.

[0045] The inclined portion 212 may extend along the circumferential direction CC and may extend from the first wall 120 at a position close to the second end 102. In one embodiment, the inclined portion 212 forms an inclined top surface along the circumferential direction CC. Figure 4 Rotate clockwise in the direction of rotation. Figure 5 Taking the perspective shown as an example, the inclined surface 212 gradually decreases along the rotation direction of the impeller 10, or in other words, the top surface of the inclined surface 212 gradually approaches the second end 102. In one embodiment, the clockwise end of each inclined surface 212 is separated from the reinforcing rib 211 of the adjacent blade root 210, and an opening 213 is formed therebetween.

[0046] A space 130 may be formed between the blade root 210 and the first wall 120. As shown in the figure, the space 130 may be located between the blade root 210 and the first wall 120. Figure 5As shown, the shape of the space 130 is constructed as follows: in the axial direction AA, the size of the space 130 gradually decreases from the side close to the first end 101 to the side close to the second end 102, so as to be suitable for accommodating a part of the mold and enable the mold to be ejected from the space 130 in the axial direction AA.

[0047] The through hole 140 may be provided on the blade root 210. In one embodiment, the through hole 140 may extend through the blade root 210, for example Figure 5 As shown in , the through hole 140 can extend approximately in the radial direction RR. Each blade root 210 may include one or more through holes 140. The through hole 140 may be arranged near the interface between the inclined portion 212 and the reinforcing rib portion 211, and may be arranged at a position on the inclined portion 212 near the second end 102. In other words, the through hole 140 may be arranged on the upstream side of the impeller rotation direction, and the inclined portion 212 may extend toward the downstream side of the impeller rotation direction. The through hole 140 may also be arranged at the interface between the inclined portion 212 and the first wall 120, and may be in communication with the space 130 or in fluid communication. In one embodiment, the through hole 140 may be located at the interface between the upper mold and the lower mold to facilitate mold demolding.

[0048] The through hole 140 may have any suitable shape, including but not limited to one of the following shapes: a circle, a portion of a circle, a portion of a ring, an ellipse, a portion of an ellipse, a triangle, a prism, a rectangle, a trapezoid, a regular pentagon, a regular hexagon, or a combination thereof. In the illustrated embodiment, the through hole 140 may be considered to be elongated, i.e., composed of a portion of a ring and two portions of a circle.

[0049] like Figure 4 As shown, in use, foreign matter including water or gravel may enter the space 130 between the blade root 210 and the first wall 120 from the opening 213 depending on different working conditions, airflow and operations. As the impeller 10 rotates in the clockwise direction (the direction indicated by the arrow B1), the foreign matter will move between the blade root 210 and the first wall 120 along the direction indicated by the arrow B, eventually reaching the through hole 140, and leaving the impeller 10 after passing through the through hole 140. If the through hole 140 is not provided, the foreign matter will accumulate in the area near the through hole 140, specifically, near the root of the inclined portion 212 and the reinforcing rib portion 211 near the second end 102, that is, Figure 4 The dotted area indicated by arrow C in FIG. Accumulation of foreign matter can cause an unbalanced state in impeller 10, leading to abnormal noise or damage. With through-holes 140, foreign matter can be easily discharged from impeller 10, thereby ensuring smooth operation of impeller 10.

[0050] like Figure 5 As shown, the slope portion 212 may have an inner peripheral surface and an outer peripheral surface. The inner peripheral surface is the side of the slope portion 212 facing the first wall 120 or the space 130, and the outer peripheral surface is the side of the slope portion 212 facing away from the first wall 120 or the space 130. The blade 200 may extend from the outer peripheral surface of the slope portion 212. Figure 5 Two blades 200 are shown, wherein the upper blade 200 is shown in cross section and shows a proximal end 201 and a distal end 202 , and the lower blade 200 is the blade associated with another bevel portion 212 .

[0051] The ring 300 may have a generally circular or annular profile and may be coupled to the distal end 202 of each blade 200. It should be noted that the ring 300 is not essential but optional. For example, the impeller may only include the hub 100 and the blades 200.

[0052] In one embodiment, the various parts of the hub 100 can be made in one piece. In one embodiment, the various parts of the impeller 10 can be made in one piece. In one embodiment, the impeller 10 can be made by molding.

[0053] Figures 6 to 8 An embodiment of a fan assembly 1 of the present application is shown. As shown, an impeller 10, a motor 20, and a frame 30 are assembled together. The motor 20 may include a rotor 500 and a stator 600. The rotor 500 may include a plurality of second mounting holes 520 and may be mounted to the end surface 110 using a first fastener 700, for example, through the first mounting holes 111 in the end surface 110. The first fastener 700 may be mounted within the second mounting holes 520. As shown, the rotor 500 may have a generally cylindrical shape. The rotor 500 may be attached to the hub 100, and a gap may exist between the outer peripheral side and front surfaces of the rotor 500 and the hub 100. This gap is provided for mounting and heat dissipation purposes, and foreign matter may enter the space between the rotor 500 and the hub 100 through this gap. Similarly, the stator 600 may also include a plurality of third mounting holes 620 and be mounted to the frame 30 using a second fastener 800. Therefore, after being installed in place, the rotor 500 and the impeller 10 can be pivoted relative to the frame 30, for example, rotated around the axial direction AA.

[0054] Thus, after assembly, the impeller 10 is pivotally attached to the frame 30, and the frame 30 surrounds the distal ends 202 of the blades 200. In the illustrated embodiment, the frame 30 surrounds the ring 300 of the impeller 10.

[0055] The impeller 10 and fan assembly 1 of the present application can be used in a vehicle, for example, as an intake fan or an exhaust fan. In one embodiment, the impeller 10 and fan assembly 1 of the present application can be used in a vehicle operating in a desert area or a humid area.

[0056] The impeller and fan assembly of the present application has the advantages of being simple, reliable, easy to implement, and convenient to use, and can provide improved foreign matter removal capabilities. By adopting the impeller and fan assembly of the present application, the life of the fan assembly is extended and the reliability is improved.

[0057] This specification discloses the present application with reference to the accompanying drawings and also enables those skilled in the art to practice the present application, including making and using any device or system, selecting suitable materials, and using any combined methods. The scope of the present application is defined by the claimed technical solution and includes other examples that occur to those skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the claimed technical solution, or such other examples include equivalent structural elements that are not substantially different from the literal language of the claimed technical solution, such other examples should be deemed to be within the scope of protection determined by the claimed technical solution.

Claims

1. An impeller, characterized in that: include: A hub (100) having an axial direction (AA) as its rotation axis and extending from a first end (101) to a second end (102), and comprising: an end surface (110) positioned at the first end (101) of the hub (100); and a first wall (120), one end of which extends toward the second end (102) around the entire periphery of the end surface (110) and includes an inner peripheral surface facing the rotation axis and an outer peripheral surface facing away from the rotation axis; a plurality of blades (200), wherein the proximal ends (201) of the blades include blade roots (210), the blade roots (210) extending from the outer peripheral surface of the first wall (120), and a plurality of spaces (130) are respectively formed between each blade root (210) and the first wall (120); and a plurality of through holes (140), wherein the through holes (140) are provided at the interface between the first wall (120) and the blade root (210), and each through hole (140) is communicated with each space (130); A first predetermined angle (A1) is formed between the first wall (120) and the axial direction (AA), and the first predetermined angle (A1) is set to be between 5 degrees and 45 degrees.

2. The impeller according to claim 1, characterized in that The blade root (210) includes: a reinforcing rib portion (211) extending from the outer peripheral surface of the first wall (120); and A sloped portion (212) extends from a distal end of the reinforcing rib portion (211), extends along the rotation direction of the impeller (10), and is coupled to a portion of the first wall (120) close to the second end (102).

3. The impeller according to claim 2, characterized in that One or more through holes (140) are arranged on the inclined surface (212) of each blade root (210), close to the reinforcing rib (211), and arranged on the upstream side in the rotation direction of the impeller (10).

4. The impeller according to claim 3, characterized in that The through hole (140) is arranged at a portion of the slope portion (212) close to the second end (102) and extends through the slope portion (212) in a radial direction (RR).

5. The impeller according to claim 2, characterized in that The outer surfaces of the reinforcing rib portion (211) and the inclined portion (212) are constructed to be continuous and extend from a position close to the first end (101) to a position close to the second end (102) along the rotation direction of the impeller (10).

6. The impeller according to claim 2, characterized in that A plurality of blade roots (210) are arranged uniformly or non-uniformly in a circumferential direction (CC), and the reinforcing rib portion (211) of each blade root (210) is spaced apart from the inclined portion (212) of an adjacent blade root (210).

7. The impeller according to claim 2, characterized in that The inclined portion (212) includes an inner peripheral surface facing the first wall (120) and an outer peripheral surface facing away from the first wall (120), the proximal end (201) of the blade (200) extends from the outer peripheral surface of the inclined portion (212), and the proximal end (201) is positioned to be spaced apart from the top of the inclined portion (212) and the end of the inclined portion (212) close to the second end (102).

8. The impeller according to any one of claims 1 to 7, characterized in that The shape of the space (130) is configured such that, in the axial direction (AA), the size of the space (130) gradually decreases from the side close to the first end (101) toward the side close to the second end (102), so as to be suitable for accommodating a part of the mold and enable the mold to be ejected from the space (130) in the axial direction (AA).

9. The impeller according to any one of claims 1 to 7, characterized in that: The through hole (140) is configured to have one of the following shapes: a circle, a portion of a circle, a portion of a ring, an ellipse, a portion of an ellipse, a triangle, a prism, a rectangle, a trapezoid, a regular pentagon, a regular hexagon, or a combination thereof.

10. A fan assembly, characterized in that: include: The impeller (10) according to any one of claims 1 to 9; A motor (20) comprising a rotor (500) and a stator (600), wherein the end surface (110) of the impeller (10) is attached to the rotor (500); and A frame (30) is provided to which the stator (600) of the motor (20) is attached, and the frame (30) is arranged around the distal end (202) of the blade (200).

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