Efficient axial flow fan module

Abstract

The utility model relates to the technical field of fans, and discloses an efficient axial flow fan module which is characterized by comprising a first shell, a second shell, a motor and fan blades. The first shell comprises a motor mounting seat, a first pressurizing sheet and a first outer ring; the inner wall of the first outer ring, the first pressurizing sheet and the motor mounting seat form a first speed-increasing air duct; the motor is arranged on the motor mounting seat; the fan blades are arranged at the output end of the motor, and the ratio of the distance between the upper portions of the blade tails to the distance between the lower portions of the blade tails is 0.7-1.3. The second shell comprises a pressurizing seat, a second pressurizing sheet and a second outer ring; the inner wall of the second outer ring, the second pressurizing sheet and the pressurizing seat form a second accelerating air duct; and after airflow passes through the first speed-increasing air duct and the second speed-increasing air duct to be accelerated, the air volume and the air supply distance are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and particularly relates to an efficient axial flow fan module. Background Art

[0002] Most of the popular fan forms on the market at present are axial flow fans. The working principle of an axial flow fan is to suck air from one end and blow it out from the other end in a direction parallel to the axis, resulting in the blown air having the disadvantages of low air pressure and short air supply distance. At the same time, the size of the fan wind primarily depends on the design of the fan blades. The number, shape, inclination angle, and material of the fan blades will directly affect the wind force, and there are defects in the design of the existing fan blade sizes.

[0003] Therefore, improvements need to be made in this regard. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide an efficient axial flow fan module to solve the problems raised in the above background art in view of the defects existing in the above-mentioned prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: An efficient axial flow fan module, comprising: a first housing, a second housing, a motor and a fan blade; the first housing, the first housing is located at the air inlet end; the first housing includes a motor mounting seat, more than one first pressurizing piece and a first outer ring; the first pressurizing pieces are distributed on the inner wall of the first outer ring and extend to connect the outer periphery of the motor mounting seat; the inner wall of the first outer ring, the first pressurizing pieces and the motor mounting seat form a first speed increasing air duct, and the first speed increasing air duct increases the radial ventilation area through the first pressurizing pieces to become smaller, thereby pressurizing and increasing the speed of the air flow; the motor, the motor is arranged on the motor mounting seat; the fan blade, the fan blade is arranged on the output end of the motor; wherein, the fan blade includes a hub and blades; the blades are evenly arranged on the outer peripheral surface of the hub; the blades have a leading edge, an outer edge, a trailing edge and an inner edge; wherein, the inner edge is spirally arranged on the outer peripheral surface of the hub, and the outer edge is arranged opposite to the inner edge; the leading edge is respectively connected to the inner edge and the outer edge; the trailing edge is respectively connected to the inner edge and the outer edge, and the trailing edge is arranged opposite to the leading edge; the connection position of the leading edge and the inner edge is the upper part of the blade tail; the connection position of the trailing edge and the inner edge is the lower part of the blade tail; the ratio of the distance between the upper parts of the blade tails of adjacent blades to the distance between the lower parts of the blade tails of adjacent blades is 0.7 to 1.3; the second housing, the second housing is located at the air outlet end and is connected to the first housing; the second housing includes a pressurizing seat, more than one second pressurizing piece and a second outer ring; the second pressurizing pieces are distributed on the inner wall of the second outer ring and extend to connect to the outer periphery of the pressurizing seat; the inner wall of the second outer ring, the second pressurizing pieces and the pressurizing seat form a second speed increasing air duct, and the second speed increasing air duct increases the radial ventilation area through the second pressurizing pieces to become smaller, thereby pressurizing and increasing the speed of the air flow; wherein, the motor drives the fan blade to rotate to generate negative pressure at the air inlet end to direct the air flow to the first speed increasing air duct, the air flow is pressurized by the first pressurizing pieces on the first outer ring and directed to the second speed increasing air duct, and the air flow is pressurized and blown out in the second speed increasing air duct through the second pressurizing pieces; so that the air flow increases the air volume and the air supply distance after passing through the first speed increasing air duct and the second speed increasing air duct.

[0006] Further, the ratio of the length of the inner edge to the length of the outer edge is 0.3 to 0.8.

[0007] Further, the ratio of the length of the leading edge to the length of the trailing edge is 0.8 to 1.2.

[0008] Further, the outer edge rotates around the center line of the hub to form an equal-diameter contour from the air inlet direction to the air outlet direction.

[0009] Further, the connection position between the leading edge and the outer edge is the upper part of the blade tip; the leading edge extends radially from the hub and presents an arc shape; wherein, the upper part of the blade tail of adjacent blades, the leading edge of adjacent blades, and the extension line of the upper part of the blade tip of adjacent blades form an air inlet area for air flow to enter.

[0010] Further, the connection position between the trailing edge and the outer edge is the lower part of the blade tip, and the trailing edge extends radially from the hub and presents an arc shape; wherein, the lower part of the blade tail of adjacent blades, the trailing edge of adjacent blades, and the extension line of the lower part of the blade tip of adjacent blades form an air outlet area for air flow to blow out.

[0011] Further, the upper part of the blade tip bends and extends to protrude above the upper part of the hub, so as to increase the pumping of the air flow by the upper part of the blade tip during rotation.

[0012] Further, the hub has a receiving portion that is recessed inward.

[0013] Further, a rotating shaft is provided at the center line position of the hub in the receiving portion.

[0014] Further, a magnetic ring is provided on the inner side wall of the receiving portion.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. In the design of the fan module, a double-speed air duct form is adopted. When the air flow passes through the first-speed air duct, the first pressure plate provided in the first-speed air duct causes the radial ventilation area to become smaller to pressurize the air flow. At the same time, the first-speed air duct is located at the air inlet end, whereby the surrounding air can be sucked in to increase the air volume; when the air flow passes through the second-speed air duct, under the action of the second pressure plate in the second-speed air duct, the air flow is further pressurized in the second stage, thereby achieving an increase in the air volume and the air supply distance of the air flow; at the same time, the ratio of the distance between the upper parts of the blade tails and the ratio of the distance between the lower parts of the blade tails are restricted to increase the air volume of the air flow and the blowing air volume.

[0017] 2. Restrict the length ratio of the inner edge to the outer edge and the length ratio of the leading edge to the trailing edge, and then restrict the ratio of the blades, thereby increasing the air volume.

[0018] 3. When the outer edge rotates, it forms an equal-diameter contour to pump and blow out the air flow.

[0019] 4. Make the upper part of the blade tip protrude above the upper part of the hub, increase the air flow pumping area between the blades, increase the pumping air volume, and blow out more air volume. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the present utility model.

[0021] Figure 2 It is a schematic structural diagram of another angle of the present utility model.

[0022] Figure 3 It is an exploded structural diagram of the present utility model.

[0023] Figure 4 It is a schematic structural diagram of the first housing.

[0024] Figure 5 It is a schematic structural diagram of the second housing.

[0025] Figure 6 It is a schematic structural diagram of the first housing and the second housing.

[0026] Figure 7 It is a schematic sectional view of the present utility model;

[0027] Figure 8 It is a schematic structural diagram of the fan blade.

[0028] Figure 9 It is a schematic structural diagram of another angle of the fan blade.

[0029] Figure 10 It is a schematic structural diagram of the fan blade.

[0030] Figure 11 It is a schematic diagram of the air inlet area of the fan blade.

[0031] Figure 12 It is a schematic diagram of the air outlet area of the fan blade.

[0032] Figure 13 It is a front view schematic diagram of the fan blade.

[0033] Figure 14 It is a schematic sectional view of the fan blade.

[0034] Figure 15 It is a schematic structural diagram of the fan blade.

[0035] Reference numerals: 1, the first housing; 2, the second housing; 3, the motor; 4, the fan blade; 5, the motor mounting seat; 6, the first pressing piece; 7, the first outer ring; 8, the first speed-increasing air duct; 9, the hub; 10, the blade; 11, the leading edge; 12, the outer edge; 13, the trailing edge; 14, the inner edge; 15, the upper part of the blade tail; 16, the lower part of the blade tail; 17, the pressurizing seat; 18, the second pressing piece; 19, the second outer ring; 20, the second speed-increasing air duct; 21, the upper part of the blade tip; 22, the air inlet area; 23, the lower part of the blade tip; 24, the air outlet area; 25, the storage part; 26, the rotating shaft; 27, the magnetic ring. Detailed implementation manners

[0036] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0037] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "several" and "multiple" is two or more, unless otherwise specifically defined. In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the present application, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] As Figures 1-10As shown in the figure, an efficient axial flow fan module is provided, including: a first housing 1, a second housing 2, a motor 3, and a fan blade 4; the first housing 1, the first housing 1 is located at the air inlet end; the first housing 1 includes a motor mounting seat 5, more than one first pressure plate 6, and a first outer ring 7; the first pressure plates 6 are distributed on the inner wall of the first outer ring 7 and extend to connect the outer periphery of the motor mounting seat 5; the inner wall of the first outer ring 7, the first pressure plates 6 and the motor mounting seat 5 form a first speed increasing air duct 8, and the first speed increasing air duct 8 increases through the first pressure plates 6, resulting in a smaller radial ventilation area to pressurize and increase the speed of the air flow; the motor 3, the motor 3 is arranged on the motor mounting seat 5; the fan blade 4, the fan blade 4 is arranged at the output end of the motor 3; wherein, the fan blade 4 includes a hub 9 and blades 10; the blades 10 are evenly arranged on the outer peripheral surface of the hub 9; the blades 10 have a leading edge 11, an outer edge 12, a trailing edge 13, and an inner edge 14; wherein, the inner edge 14 is spirally arranged on the outer peripheral surface of the hub 9, and the outer edge 12 is arranged opposite to the inner edge 14; the leading edge 11 is respectively connected to the inner edge 14 and the outer edge 12; the trailing edge 13 is respectively connected to the inner edge 14 and the outer edge 12, and the trailing edge 13 is arranged opposite to the leading edge 11; the connection position of the leading edge 11 and the inner edge 14 is the upper part of the blade tail 15; the connection position of the trailing edge 13 and the inner edge 14 is the lower part of the blade tail 16; the ratio of the distance between the upper parts of the blade tails 15 of adjacent blades 10 to the distance between the lower parts of the blade tails 16 of adjacent blades 10 is 0.7 to 1.3; the second housing 2, the second housing 2 is located at the air outlet end and is connected to the first housing 1; the second housing 2 includes a pressurizing seat 17, more than one second pressure plate 18, and a second outer ring 19; the second pressure plates 18 are distributed on the inner wall of the second outer ring 19 and extend to connect to the outer periphery of the pressurizing seat 17; the inner wall of the second outer ring 19, the second pressure plates 18 and the pressurizing seat 17 form a second speed increasing air duct 20, and the second speed increasing air duct 20 increases through the second pressure plates 18, resulting in a smaller radial ventilation area to pressurize and increase the speed of the air flow; wherein, the motor 3 drives the fan blade 4 to rotate to generate negative pressure at the air inlet end to direct the air flow to the first speed increasing air duct 8, the air flow is pressurized by the first pressure plates 6 in the first outer ring 7 and directed to the second speed increasing air duct 20, and the air flow is pressurized and blown out in the second speed increasing air duct 20 by the second pressure plates 18; so that the air flow increases the air volume and the air supply distance after passing through the first speed increasing air duct 8 and the second speed increasing air duct 20.

[0039] In view of the technical problems recorded in the background art, an efficient axial flow fan module is provided, mainly including a first housing 1, a second housing 2, a motor 3, and a fan blade 4.

[0040] For the first housing 1, refer to Figure 3 andFigure 4 For the first housing 1, the first housing 1 includes a first outer ring 7, a motor mounting seat 5, and a first pressing piece 6; the motor mounting seat 5, the first outer ring 7, and the first pressing piece 6 can be integrally formed or independent components. The motor mounting seat 5 can be arranged at the air inlet end or the air outlet end of the first outer ring 7. As an implementable technical solution, the motor mounting seat 5, the first outer ring 7, and the first pressing piece 6 are integrally formed, and the motor mounting seat 5 is arranged at the air outlet end of the first outer ring 7. The first pressing piece 6 can be evenly distributed or unevenly distributed between the first outer ring 7 and the motor mounting seat 5. Preferably, the first pressing piece 6 is circumferentially evenly distributed. Due to the existence of the first pressing piece 6, the radial ventilation area of the airflow passing through the first outer ring 7 becomes smaller, and the first housing 1 is located at the air inlet end. The airflow can suck and gather the surrounding airflow, increasing the air volume. At the same time, the airflow is pressurized to increase the airflow speed.

[0041] As Figures 8-10 shown, for the fan blade 4, the fan blade 4 mainly includes a hub 9 and blades 10. The hub 9 is used to mount the blades 10. The blades 10 are distributed on the outer peripheral surface of the hub 9 in a circumferential array manner. The blades 10 and the hub 9 are of an integral structure or an independent structure. When an independent structure is adopted, the blades 10 are assembled with the hub 9 by a connecting structure. Preferably, the blades 10 and the hub 9 are of an integral structure. The blade 10 is a sheet-like structure formed by sequentially connecting a leading edge 11, an outer edge 12, a trailing edge 13, and an inner edge 14. Among them, the inner edge 14 bends and extends along the center line direction of the hub 9. The outer edge 12 is arranged opposite to the inner edge 14, and the leading edge 11 is arranged opposite to the trailing edge 13. The region where the leading edge 11 and the inner edge 14 meet is defined as the upper part of the blade tail 15, and the region where the trailing edge 13 and the inner edge 14 meet is defined as the lower part of the blade tail 16. In implementation, when the ratio of the spacing dimension between the upper parts of the blade tails 15 between adjacent blades 10 to the spacing dimension between the lower parts of the blade tails 16 between adjacent blades 10 is between 0.7 and 1.3, the length ratios of the inner edge 14 to the outer edge 12 and the leading edge 11 to the trailing edge 13 are restricted, and thus the ratio of the blade 10 is restricted, thereby increasing the air volume. For example, the ratio of the spacing dimension between the upper parts of the blade tails 15 between adjacent blades 10 to the spacing dimension between the lower parts of the blade tails 16 between adjacent blades 10 is 0.7; the ratio of the spacing dimension between the upper parts of the blade tails 15 between adjacent blades 10 to the spacing dimension between the lower parts of the blade tails 16 between adjacent blades 10 is 1; the ratio of the spacing dimension between the upper parts of the blade tails 15 between adjacent blades 10 to the spacing dimension between the lower parts of the blade tails 16 between adjacent blades 10 is 1.3.

[0042] Refer to Figure 3 and Figure 5, the second housing 2 includes a second outer ring 19, a pressurizing seat 17, and a second pressing piece 18. Among them, the second outer ring 19, the pressurizing seat 17, and the second pressing piece 18 can be integrally formed or in the form of independent components. Preferably, the second outer ring 19, the pressurizing seat 17, and the second pressing piece 18 are integrally formed. The second housing 2 can be in an integral form or in the form of independent components with the first housing 1. The second pressing piece 18 can be evenly distributed or unevenly distributed between the second outer ring 19 and the pressurizing seat 17. Preferably, the second pressing piece 18 is evenly distributed in a circumferential manner. The presence of the second pressing piece 18 in the second speed-increasing air duct 20 causes the radial ventilation area of the air flow passing through the second outer ring 19 to become smaller, further pressurizing the air flow and increasing the air flow speed.

[0043] The ratio of the length of the inner edge 14 to the length of the outer edge 12 is 0.3 - 0.8. In implementation, when restricting the ratio between the length of the inner edge 14 and the length of the outer edge 12, restricting the inner edge 14 on the hub 9 of the fan blade 4 and the outer edge 12 far from the hub 9 can also increase the amount of air pumped when the fan blade 4 rotates. For example, the ratio of the length of the inner edge 14 to the length of the outer edge 12 is 0.3, the ratio of the length of the inner edge 14 to the length of the outer edge 12 is 0.5, and the ratio of the length of the inner edge 14 to the length of the outer edge 12 is 0.8.

[0044] The ratio of the length of the leading edge 11 to the length of the trailing edge 13 is 0.8 - 1.2. In implementation, when restricting the ratio between the length of the leading edge 11 and the length of the trailing edge 13, it can also increase the amount of air pumped when the fan blade 4 rotates. For example, the ratio of the length of the leading edge 11 to the length of the trailing edge 13 is 0.8; the ratio of the length of the leading edge 11 to the length of the trailing edge 13 is 1; the ratio of the length of the leading edge 11 to the length of the trailing edge 13 is 1.2

[0045] The outer edge 12 rotates around the center line of the hub 9 to form an equal-diameter contour from the air inlet direction to the air outlet direction. As a preferred technical solution, in the design of the outer edge 12, when the blade 10 rotates around the center line of the hub 9, the movement contour formed by the rotation of the outer edge 12 is an equal-diameter contour, that is, it presents the form of the outer peripheral surface of a cylinder, thereby improving the pumping of the air flow and increasing the amount of blown air.

[0046] Reference Figures 10-11 As shown, the connection position of the leading edge 11 and the outer edge 12 is the upper part of the blade tip 21; the leading edge 11 radially extends from the hub 9 and presents an arc shape; among them, the upper part of the blade tail 15 of the adjacent blades 10, the leading edge 11 of the adjacent blades 10, and the extension line of the upper part of the blade tip 21 of the adjacent blades 10 form an air inlet area 22 for the air flow to enter.

[0047] In practice, the junction area between the leading edge 11 and the outer edge 12 is defined as the upper portion 21 of the blade tip, and the leading edge 11 is in an arc shape, so that when the blade 10 rotates, it is easier to cut the airflow and draw the airflow into the wind inlet area 22 formed by the upper portion 15 of the blade tail of the adjacent blade 10, the leading edge 11 of the adjacent blade 10, and the extension line of the upper portion 21 of the blade tip of the adjacent blade 10.

[0048] refer to Figure 10 and 12 As shown, the connection position between the trailing edge 13 and the outer edge 12 is the lower part 23 of the blade tip, and the trailing edge 13 extends radially from the hub 9 in an arc shape; wherein, the lower part 16 of the blade tail of the adjacent blade 10, the trailing edge 13 of the adjacent blade 10 and the extension line of the lower part 23 of the blade tip of the adjacent blade 10 form an outlet area 24 for airflow to blow out.

[0049] In implementation, the junction area between the trailing edge 13 and the outer edge 12 is defined as the lower part 23 of the blade tip, and the trailing edge 13 is an arc-shaped style, and the airflow is blown out through the lower part 16 of the blade tail of the adjacent blade 10, the trailing edge 13 of the adjacent blade 10, and the extension line of the lower part 23 of the blade tip of the adjacent blade 10 to form an air outlet area 24.

[0050] refer to Figures 13-14 Specifically, the upper portion 21 of the blade tip is bent and extends to protrude from the upper portion of the hub 9, so as to increase the suction of the airflow by the upper portion 21 of the blade tip during rotation.

[0051] In order to increase the amount of airflow pumped by the blade 10 during rotation, the upper part 21 of the blade tip can be further designed to be a curved extension protruding from the upper part of the hub 9. Through this structural design, the upper part 21 of the blade tip increases the contact area with the airflow, and can pump more airflow and guide the airflow through the curved structure, thereby increasing the amount of air blown out by the fan blade 4.

[0052] refer to Figure 15 Preferably, the hub 9 has an inwardly recessed receiving portion 25. The hub 9 is designed to have the receiving portion 25, and the receiving portion 25 is provided with a rotating shaft 26 at the center line position of the hub 9. A magnetic ring 27 is provided on the inner side wall of the receiving portion 25.

[0053] The rotating shaft 26 and the magnetic ring 27 can be installed on the wheel hub 9, which saves the number of parts and makes installation more convenient.

[0054] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An efficient axial flow fan module, characterized in that, Comprising: A first housing, a second housing, a motor and a fan blade; The first housing, which is located at the air inlet end; the first housing includes a motor mounting seat, more than one first pressurizing piece and a first outer ring; the first pressurizing pieces are distributed on the inner wall of the first outer ring and extend to connect the outer periphery of the motor mounting seat; the inner wall of the first outer ring, the first pressurizing pieces and the motor mounting seat form a first speed increasing air duct, and the first speed increasing air duct increases through the first pressurizing pieces, resulting in a smaller radial ventilation area to pressurize and increase the speed of the air flow; The motor, which is arranged on the motor mounting seat; The fan blade, which is arranged on the output end of the motor; wherein, the fan blade includes a hub and blades; the blades are evenly arranged on the outer peripheral surface of the hub; the blades have leading edges, outer edges, trailing edges and inner edges; wherein, the inner edges are spirally arranged on the outer peripheral surface of the hub, and the outer edges are arranged opposite to the inner edges; the leading edges are respectively connected to the inner edges and the outer edges; the trailing edges are respectively connected to the inner edges and the outer edges, and the trailing edges are arranged opposite to the leading edges; The connection position of the leading edge and the inner edge is the upper part of the blade tail; the connection position of the trailing edge and the inner edge is the lower part of the blade tail; the ratio of the distance between the upper parts of the blade tails of adjacent blades to the distance between the lower parts of the blade tails of adjacent blades is 0.7 to 1.3; The second housing, which is located at the air outlet end and is connected to the first housing; the second housing includes a pressurizing seat, more than one second pressurizing piece and a second outer ring; the second pressurizing pieces are distributed on the inner wall of the second outer ring and extend to connect to the outer periphery of the pressurizing seat; the inner wall of the second outer ring, the second pressurizing pieces and the pressurizing seat form a second speed increasing air duct, and the second speed increasing air duct increases through the second pressurizing pieces, resulting in a smaller radial ventilation area to pressurize and increase the speed of the air flow; Wherein, the motor drives the fan blade to rotate to generate negative pressure at the air inlet end to direct the air flow to the first speed increasing air duct, the air flow is pressurized by the first pressurizing pieces on the first outer ring and directed to the second speed increasing air duct, and the air flow is pressurized and blown out in the second speed increasing air duct; so that the air flow increases the air volume and the air supply distance after passing through the first speed increasing air duct and the second speed increasing air duct.

2. The high-efficiency axial flow fan module according to claim 1, wherein: The ratio of the length of the inner edge to the length of the outer edge is 0.3 to 0.

8.

3. The high-efficiency axial flow fan module according to claim 1, wherein: The ratio of the length of the leading edge to the length of the trailing edge is 0.8 to 1.

2.

4. The high-efficiency axial flow fan module according to claim 1, wherein: The outer edge rotates around the center line of the hub to form an equal-diameter profile from the air inlet direction to the air outlet direction.

5. The high-efficiency axial flow fan module according to claim 4, wherein: The connection position of the leading edge and the outer edge is the upper part of the blade tip; the leading edge extends radially from the hub and presents an arc shape; Among them, the upper part of the trailing edge of the adjacent blades, the leading edge of the adjacent blades, and the extension line of the upper part of the blade tips of the adjacent blades form an air inlet area for air flow to enter.

6. The high-efficiency axial flow fan module according to claim 5, characterized in that: The connection position of the trailing edge and the outer edge is the lower part of the blade tip, and the trailing edge extends radially from the hub in an arc shape; Among them, the lower part of the trailing edge of the adjacent blades, the trailing edge of the adjacent blades, and the extension line of the lower part of the blade tips of the adjacent blades form an air outlet area for air flow to blow out.

7. The high-efficiency axial flow fan module according to claim 6, characterized in that: The upper part of the blade tip bends and extends to protrude above the hub, so as to increase the pumping of the air flow by the upper part of the blade tip during rotation.

8. The high-efficiency axial flow fan module according to claim 7, characterized in that: The hub has a receiving portion that is recessed inward.

9. The high-efficiency axial flow fan module according to claim 8, characterized in that: The receiving portion is provided with a rotating shaft at the center line position of the hub.

10. The high-efficiency axial flow fan module according to claim 9, characterized in that: A magnetic ring is provided on the inner side wall of the receiving portion.

Images