Fan impeller

Abstract

The fan impeller comprises a main disc, the main disc is provided with a front wheel disc and a rear wheel disc, the front wheel disc is provided with a front base disc and front fan blades, the front fan blades are bent forwards to form front through holes, the rear wheel disc is provided with a rear base disc and rear fan blades, the rear fan blades are bent backwards to form rear through holes, and the front through holes and the rear through holes are communicated to form air passing holes. The main disc is configured into the front wheel disc and the rear wheel disc, the front wheel disc is provided with the front fan blades which are bent forwards to form the front through holes, the rear wheel disc is provided with the rear fan blades which are bent backwards to form the rear through holes, and when the impeller rotates, the front fan blades supply air to the air outlet of the fan; the rear fan blades generate negative pressure to pump away heat generated by the motor and supply air to the air outlet (play a role in pressurization and heat dissipation), good air supply / pressurization / heat dissipation effects are achieved, meanwhile, due to the fact that the front through holes are communicated with the rear through holes, the overflowing area and the air pressure when the rear fan blades form the negative pressure to supply air forwards are increased, the pressurization and heat dissipation effects are better, and air noise is reduced.

Description

Technical Field

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

[0002] A fan is a device that forms a high-pressure airflow through a high-speed rotating impeller. Existing fans include a housing, a motor disposed in the housing, and an impeller connected to the output shaft of the motor. The impeller has a base plate connected to the motor and blades spaced apart in the circumferential direction of the base plate. The base plate is a flat sealed disc. Since the base plate adopts a flat sealing structure, the heat generated by the motor will accumulate when the fan is working, causing the motor and its surrounding accessories to run at high temperatures, resulting in a short service life. Utility Model Content

[0003] The utility model aims to provide a fan impeller to solve the problem that the base disc of the existing fan impeller adopts a flat sealing structure and has poor heat dissipation performance, which leads to a large amount of heat accumulation when the motor is working, shortening the service life of the motor and its surrounding accessories.

[0004] The utility model is realized by the following technical solutions:

[0005] The fan impeller includes a main disk, the main disk has a front wheel disk and a rear wheel disk that are abutted against each other front and back, the front wheel disk has a front base disk and a plurality of front wind blades integrally formed with the front base disk, the plurality of front wind blades are bent forward from the front base disk to form a plurality of front through holes circumferentially spaced apart on the front wheel disk, the rear wheel disk has a rear base disk and a plurality of rear wind blades integrally formed with the rear base disk, the plurality of rear wind blades are bent backward from the rear base disk to form a plurality of rear through holes circumferentially spaced apart on the rear wheel disk, the plurality of front through holes correspond to the plurality of rear through holes one by one and are interconnected to form a plurality of air holes circumferentially spaced apart on the main disk.

[0006] Further, the rear through hole and the front through hole are in the same relative position and shape, and / or the rear fan blade and the front fan blade are in the same shape.

[0007] Furthermore, the rear fan blade is located directly behind the front fan blade and forms a main fan blade symmetrically with the front fan blade.

[0008] Furthermore, the air hole opens on the circumferential side of the main disk, the main fan blade has an inner extension portion extending along the air hole and an outer extension portion extending outside the main disk, and the outer extension portion bends outward from the inner extension portion in the circumferential direction of the main disk.

[0009] Furthermore, the air holes are V-shaped holes or U-shaped holes.

[0010] Furthermore, the air hole is a V-shaped hole, and the air hole has two straight edges, one end of the two straight edges is connected and the other end extends to the outer edge of the main disk, the main fan blade is arranged on any one of the straight edges, the intersection of the two connected ends of the straight edges is defined as O1, the axis of the main disk is defined as O2, and the two straight edges are symmetrically arranged about the line connecting O1 and O2.

[0011] Furthermore, the inner extension portion extends from the inside to the outside and is inclined in the circumferential direction of the main disk, and several of the inner extension portions have the same inclination in the circumferential direction of the main disk, and / or several of the outer extension portions have the same bending direction in the circumferential direction of the main disk.

[0012] Furthermore, the main disc has a plurality of connecting arms which are arranged between any two adjacent air holes, and the front wheel disc and the rear wheel disc are detachably fixedly connected to the connecting arms.

[0013] Furthermore, a front convex rib is convexly provided on a side of the front base plate facing away from the rear base plate, and / or a rear convex rib is convexly provided on a side of the rear base plate facing away from the front base plate.

[0014] Furthermore, the main plate is provided with a front cover plate on the side of the front wheel plate facing away from the rear wheel plate, and a rear cover plate is provided on the side of the rear wheel plate facing away from the front wheel plate, the front cover plate and the rear cover plate are detachably fixedly connected to the main plate and are coaxially arranged, the main plate is provided with a coupling hole, the front cover plate is provided with a front connecting hole connected to the coupling hole, the rear cover plate is provided with a rear connecting hole connected to the coupling hole, the main plate, the front cover plate and the rear cover plate are connected with second rivets, there are a plurality of the second rivets, and the plurality of the second rivets are spaced apart in the circumferential direction of the front cover plate.

[0015] The advantages of this technical solution are:

[0016] 1. By configuring the main disk into a front wheel disk and a rear wheel disk that are offset from each other, the front wheel disk has a front base disk and a front fan blade bent forward from the front base disk, and the rear wheel disk has a rear base disk and a rear fan blade bent backward from the rear base disk. When the impeller rotates, the front fan blade sends air toward the air outlet of the fan, and the rear fan blade generates negative pressure to draw away the heat generated by the motor and send it toward the air outlet (playing the role of pressurization and heat dissipation). Therefore, the impeller has good air supply / pressurization / heat dissipation effects, avoids heat accumulation, and increases the service life of the motor and its surrounding accessories.

[0017] 2. Since the front fan blades are bent forward to form the front through holes, and the rear fan blades are bent backward to form the rear fan blades, the front through holes and the rear through holes are interconnected to form the air holes of the main disk, which increases the flow area and wind pressure when the rear fan blades form negative pressure to send air forward, making the pressurized heat dissipation effect better, with low wind noise and light weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0020] Figure 1 is a three-dimensional diagram of the fan impeller disclosed in Example 1;

[0021] Figure 2 is an exploded view of the fan impeller disclosed in Example 1;

[0022] Figure 3 is a front view of the fan impeller disclosed in Example 1;

[0023] Figure 4 is a cross-sectional view of the fan impeller disclosed in Example 1;

[0024] Figure 5 is a perspective view of the front wheel disc in Example 1;

[0025] Figure 6 is a perspective view of the rear wheel disc in Embodiment 1;

[0026] Figure 7 is a three-dimensional diagram of the fan impeller disclosed in Example 2;

[0027] Figure 8 This is a front view of the fan impeller disclosed in Example 2. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example 1: Figure 1-6As shown, the fan impeller includes a main disc 1, which has a front wheel disc 101 and a rear wheel disc 102 that are abutted against each other front to back, the front wheel disc 101 has a front base disc 103 and a plurality of front wind blades 104 integrally formed with the front base disc 103, the plurality of front wind blades 104 are bent forward from the front base disc 103 to form a plurality of front through holes 107 circumferentially spaced apart on the front wheel disc 101, the rear wheel disc 102 has a rear base disc 105 and a plurality of rear wind blades 106 integrally formed with the rear base disc 105, the plurality of rear wind blades 106 are bent backward from the rear base disc 105 to form a plurality of rear through holes 108 circumferentially spaced apart on the rear wheel disc 102, the plurality of rear through holes 108 correspond one-to-one with the plurality of front through holes 107 and are interconnected to form a plurality of air holes 109 spaced apart circumferentially on the main disc 1.

[0030] When the fan impeller is used on the fan, it is arranged on one side of the motor and driven by the motor. When the impeller rotates, the wind generated by the front blades 104 is blown out from the air outlet of the fan, and the rear blades 106 generate negative pressure to extract the heat of the motor and send air toward the air outlet.

[0031] In summary, the present embodiment provides a fan impeller to solve the problem that the base disk of the existing fan impeller adopts a flat sealing structure and has poor heat dissipation performance, which causes a large amount of heat generated when the motor is working to accumulate, shortening the service life of the motor and its surrounding accessories. The main method is to configure the main disk 1 into a front wheel disk 101 and a rear wheel disk 102 that are offset from each other, the front wheel disk 101 has a front base disk 103 and a front wind blade 104 bent forward from the front base disk 103, the rear wheel disk 102 has a rear base disk 105 and a rear wind blade 106 bent backward from the rear base disk 105, when the impeller rotates, the front wind blade 104 sends air toward the fan outlet, and the rear wind blade 106 generates negative pressure to draw away the heat generated by the motor and send air toward the outlet (playing the role of pressurized heat dissipation), so that the impeller has good air supply / heat dissipation / pressurization effects, avoids heat accumulation, and improves the service life of the motor and its surrounding accessories. At the same time, since the front fan blade 104 is bent forward to form the front through hole 107, and the rear fan blade 106 is bent backward to form the rear fan blade 106, the front through hole 107 and the rear through hole 108 are interconnected to form the air hole 109 of the main disk 1, thereby increasing the flow area and wind pressure when the rear fan blade 106 forms a negative pressure to send air forward, so that the pressurized heat dissipation effect is better, and the wind noise is low and the weight is light.

[0032] In the embodiment of the utility model, the front fan blade 104 is integrally formed with the front base plate 103 and is perpendicular to each other. The above arrangement simplifies the assembly structure of the front fan blade 104 and the front base plate 103 and makes the connection between the two stable and not easy to loosen and deform.

[0033] In the embodiment of the utility model, the rear fan blade 106 is integrally formed with the rear base plate 105 and is perpendicular to each other. The above arrangement simplifies the assembly structure of the rear fan blade 106 and the rear base plate 105 and makes the connection between the two stable and not easy to loosen and deform.

[0034] In the embodiment of the utility model, the rear fan blade 106 is consistent in shape with the front fan blade 104, and the rear through hole 108 is consistent in relative position with the front through hole 107. Since the rear through hole 108 is consistent in relative position with the front through hole 107, and the rear fan blade 106 is consistent in relative position with the front fan blade 104, the structure of the main disk 1 is compact and reasonable, and the air volume of the air outlet and the air exhaust is similar when the impeller rotates, and the air supply and heat dissipation effect is good.

[0035] In the embodiment of the utility model, the rear fan blade 106 is located directly behind the front fan blade 104 and symmetrically forms the main fan blade 110 with the front and rear fan blades 104. The air hole 109 opens on the peripheral side of the main disk 1. The main fan blade 110 has an inner extension portion 111 extending along the air hole 109 and an outer extension portion 112 extending outside the main disk 1. The outer extension portion 112 bends and extends outward from the inner extension portion 111 in the circumferential direction of the main disk 1. Among them, the outer extension portion 112 plays a pressurizing role when the impeller rotates. The above-mentioned arrangement configures the main fan blade 110 into an inner extension portion 111 extending along the air hole 109 and an outer extension portion 112 bending and extending outward from the inner extension portion 111 in the circumferential direction of the main disk 1, so that the main fan blade 110 has a good pressurized heat dissipation effect.

[0036] Specifically, the end of the extension portion 112 is defined as O3, and the angle β between the tangent line of the extension portion 112 and the line connecting O3O2 is in the range of 75° to 85°, preferably 81°.

[0037] In the embodiment of the utility model, the air hole 109 is a V-shaped hole, and the air hole 109 has two straight edges 113, one end of the two straight edges 113 is connected and the other end extends to the outer edge of the main plate 1, and the main fan blade 110 is arranged on any straight edge 113. The above arrangement configures the air hole 109 as a V-shaped hole, so that the main plate 1 still has good structural strength after adopting a hollow design, and is not easy to bend and deform.

[0038] The hole shape of the air hole 109 includes but is not limited to a V-shaped hole and a U-shaped hole.

[0039] In the embodiment of the utility model, the value range of the angle θ of the two straight edges 113 is: 34°~46°. The above setting configures the value range of the angle θ of the two straight edges 113 to be 34°~46°, which is reasonable, that is, the wind passing area and wind pressure of the main plate 1 are increased, and the structural strength of the main plate 1 is ensured.

[0040] In the embodiment of the utility model, the intersection point of one end where the two straight edges 113 are connected is defined as O1, the axis of the main disk 1 is defined as O2, the two straight edges 113 are symmetrically arranged about the line connecting O1 and O2, and the value range of the angle α between the straight edges 113 and the line connecting O1O2 is: 17°~23°.

[0041] In the embodiment of the utility model, the inner extension part 111 extends from the inside to the outside and is arranged obliquely in the circumferential direction of the main plate 1. The inclination of the plurality of inner extension parts 111 in the circumferential direction of the main plate 1 is consistent, and the bending direction of the plurality of outer extension parts 112 in the circumferential direction of the main plate 1 is consistent. The above arrangement allows the main plate 1 to pass air evenly and has a good air supply and heat dissipation effect.

[0042] In the embodiment of the utility model, the main disc 1 has a plurality of connecting arms 114 disposed between any two adjacent air holes 109, and the front wheel disc 101 and the rear wheel disc 102 are detachably fixedly connected at the connecting arms 114. Specifically, a first rivet 115 connecting the front base disc 103 and the rear base disc 105 is disposed at one end of each connecting arm 114 adjacent to the outer edge of the main disc 1. Since the front wheel disc 101 and the rear wheel disc 102 are connected at the connecting arms 114 through the first rivet 115, the connection structure between the front wheel disc 101 and the rear wheel disc 102 is simple and firm.

[0043] The connection structure between the front wheel disc 101 and the rear wheel disc 102 includes but is not limited to riveting and welding.

[0044] In the embodiment of the utility model, the outer extension portion 112 is bent and extended from the inner extension portion 111 toward the connecting arm 114 in the circumferential direction of the main disk 1 .

[0045] In the embodiment of the utility model, a front convex rib 100 is convexly provided on the side of the front base 103 facing away from the rear base 105, and the outer contour of the front convex rib 100 is consistent with the outer contour of the front base 103. A rear convex rib 120 is convexly provided on the side of the rear base 105 facing away from the front base 103, and the outer contour of the rear convex rib 120 is consistent with the outer contour of the rear base 105. The above arrangement is provided by providing the front convex rib 100 on the side of the front base 103 facing away from the rear base 105, and providing the rear convex rib 120 on the side of the rear base 105 facing away from the front base 103, so that the front base 103 and the rear base 105 have good structural strength and strong anti-bending and anti-deformation capabilities.

[0046] In the embodiment of the utility model, a front cover plate 2 is provided on the side of the front wheel disc 101 of the main disc 1 facing away from the rear wheel disc 102, and a rear cover plate 3 is provided on the side of the rear wheel disc 102 facing away from the front wheel disc 101. The front cover plate 2 and the rear cover plate 3 are respectively detachably fixedly connected to the main disc 1 and are coaxially arranged. A coupling hole 116 is provided on the main disc 1, a front connecting hole 201 communicating with the coupling hole 116 is provided on the front cover plate 2, and a rear connecting hole 301 communicating with the coupling hole 116 is provided on the rear cover plate 3. Second rivets 4 are connected to the main disc 1, the front cover plate 2 and the rear cover plate 3. There are a plurality of second rivets 4, and the plurality of second rivets 4 are spaced apart in the circumferential direction of the front cover plate 2. The above-mentioned arrangement is achieved by arranging a front cover plate 2 on the side of the front wheel disc 101 facing away from the rear wheel disc 102, arranging a rear cover plate 3 on the side of the rear wheel disc 102 facing away from the front wheel disc 101, and connecting the main disc 1, the front cover plate 2 and the rear cover plate 3 through a second rivet 4, thereby making the connection between the front wheel disc 101 and the rear wheel disc 102 stable, and the connection structure is simple and firm.

[0047] The front convex rib 100 is formed with a front concave hole 121 for the front cover plate 2 to be inserted into, and the rear convex rib 120 is formed with a rear concave hole 122 for the rear cover plate 3 to be inserted into. The above arrangement provides good assembly stability for the front cover plate 2 and the rear cover plate 3 by configuring the front concave hole 121 on the front convex rib 100 and the rear concave hole 122 on the rear convex rib 120.

[0048] Example 2: Figure 7-8 As shown, the difference from the first embodiment is that the outer extension portion 112 is bent and extended from the inner extension portion 111 in the circumferential direction of the main disk 1 in a direction away from the connecting arm 114 .

[0049] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center of a circle", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the utility model is not limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or some technical deductions or replacements made on the premise of the concept of the utility model should be regarded as the protection of the utility model.

Claims

1. A fan impeller, characterized in that: The invention comprises a main disc, wherein the main disc comprises a front wheel disc and a rear wheel disc which are abutted against each other front and back, the front wheel disc comprises a front base disc and a plurality of front fan blades which are integrally formed with the front base disc, the plurality of front fan blades are bent forward from the front base disc to form a plurality of front through holes which are circumferentially spaced apart on the front wheel disc, the rear wheel disc comprises a rear base disc and a plurality of rear fan blades which are integrally formed with the rear base disc, the plurality of rear fan blades are bent backward from the rear base disc to form a plurality of rear through holes which are circumferentially spaced apart on the rear wheel disc, the plurality of front through holes correspond to the plurality of rear through holes one by one and are interconnected to form a plurality of air holes which are spaced apart circumferentially on the main disc.

2. The fan impeller according to claim 1, characterized in that: The rear through hole and the front through hole have the same relative position and shape, and / or the rear fan blade and the front fan blade have the same shape.

3. The fan impeller according to claim 1, characterized in that: The rear fan blade is located directly behind the front fan blade and forms a main fan blade symmetrically with the front fan blade.

4. The fan impeller according to claim 3, characterized in that: The air hole opens at the peripheral side of the main disk, and the main fan blade has an inner extension portion extending along the air hole and an outer extension portion extending outside the main disk, and the outer extension portion bends outward from the inner extension portion in the peripheral direction of the main disk.

5. The fan impeller according to claim 4, characterized in that: The air holes are V-shaped holes or U-shaped holes.

6. The fan impeller according to claim 4, characterized in that: The air hole is a V-shaped hole, and the air hole has two straight edges, one end of the two straight edges is connected and the other end extends to the outer edge of the main disk, the main fan blade is arranged on any one of the straight edges, the intersection of the two connected ends of the straight edges is defined as O1, the axis of the main disk is defined as O2, and the two straight edges are symmetrically arranged about the line connecting O1 and O2.

7. The fan impeller according to claim 4, characterized in that: The inner extension portion extends from the inside to the outside and is inclined in the circumferential direction of the main disk. Several of the inner extension portions have the same inclination in the circumferential direction of the main disk, and / or several of the outer extension portions have the same bending direction in the circumferential direction of the main disk.

8. The fan impeller according to claim 1, characterized in that: The main disc has a plurality of connecting arms which are arranged between any two adjacent air holes, and the front wheel disc and the rear wheel disc are detachably fixedly connected to the connecting arms.

9. The fan impeller according to claim 1, characterized in that: A front convex rib is convexly provided on a side of the front base plate facing away from the rear base plate, and / or a rear convex rib is convexly provided on a side of the rear base plate facing away from the front base plate.

10. The fan impeller according to claim 1, characterized in that: The main disc is provided with a front cover plate on the side of the front wheel disc facing away from the rear wheel disc, and a rear cover plate is provided on the side of the rear wheel disc facing away from the front wheel disc, and the front cover plate and the rear cover plate are respectively detachably fixedly connected to the main disc and coaxially arranged; The main plate is provided with a coupling hole, the front cover plate is provided with a front connecting hole connected to the coupling hole, and the rear cover plate is provided with a rear connecting hole connected to the coupling hole; The main plate, the front cover plate and the rear cover plate are connected with second rivets, and there are a plurality of second rivets, which are spaced apart and distributed in the circumferential direction of the front cover plate.

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