Inside-straight and outside-inclined accelerated airflow mixed flow generator

Abstract

The utility model relates to the technical field of fans, and discloses an inside-straight and outside-inclined accelerated airflow mixed flow generator, which comprises a motor mounting seat, a motor; a fan blade; the first shell comprises a first outer ring and a first pressurizing sheet, and the inner wall of the first outer ring, the first pressurizing sheet and the motor mounting seat form a first acceleration air duct; the second shell comprises a second outer ring, a pressurizing seat and a second pressurizing piece, the inner wall of the second outer ring radially shrinks in the direction from the air inlet end to the air outlet end to form an outer air guide face to pressurize and accelerate airflow, and the outer wall of the pressurizing seat extends in an equal-diameter mode from the air inlet end to the air outlet end to form an inner air guide face to pressurize and accelerate airflow; the inner wall of the second outer ring, the second pressurizing sheet and the pressurizing seat form a second accelerating air duct; the motor drives the fan blades to rotate to generate negative pressure at the air inlet end to guide airflow to the first speed-increasing air duct and the second speed-increasing air duct. After airflow is accelerated through the first acceleration air duct and the second acceleration air duct, the air volume and the air supply distance are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to an inner straight and outer inclined accelerated airflow mixed flow generator. Background Art

[0002] A fan is an electrical appliance that uses an electric motor to drive the blades to rotate to accelerate the circulation of air.

[0003] Most of the fans currently on the market use a structure in which a motor and fan blades are arranged inside a shell to achieve a straight-in and straight-out blowing mode.

[0004] This structure has the advantages of simple structure, small air volume loss and unchanged air flow direction, so it is widely used in the market. However, it also has obvious disadvantages. Due to its low wind pressure and short air supply distance, it cannot blow air at a slightly farther distance and cannot cool the user. There is also a lack of effective solutions to this problem on the market.

[0005] Therefore, improvements need to be made to this. Utility Model Content

[0006] The technical problem solved by the present invention is to provide an inner straight and outer inclined accelerated airflow mixed flow generator to solve the problems raised in the above background technology in view of the defects existing in the above prior art.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: an internal straight and external inclined accelerated airflow mixed flow generator, comprising: a motor mounting seat; a motor, the motor being arranged on the motor mounting seat; fan blades, the fan blades being arranged on the output end of the motor; a first shell, the first shell being located at the air inlet end; the first shell comprising a first outer ring and one or more first pressure sheets; the first pressure sheets are distributed on the inner wall of the first outer ring and extend to connect the outer peripheral edge of the motor mounting seat; the inner wall of the first outer ring, the first pressure sheet and the motor mounting seat form a first speed-increasing air duct, the first speed-increasing air duct is increased by the first pressure sheet, resulting in a smaller radial ventilation area, thereby pressurizing and accelerating the airflow; a second shell, the second shell being located at the air outlet end and connected to the first shell; the second shell comprising a second outer ring, a pressurizing seat and one or more second pressure sheets; the second pressure sheet The fan is connected to the outer peripheral edge of the pressure reducing unit and the fan is connected to the inner wall of the second outer ring and the outer peripheral edge of the pressure reducing unit; the inner wall of the second outer ring radially contracts from the air inlet end to the air outlet end to form an outer wind guide surface to pressurize and increase the speed of the airflow; the outer wall of the pressure reducing unit extends equidiametrically from the air inlet end to the air outlet end to form an inner wind guide surface to supply air to the airflow; the inner wall of the second outer ring, the second pressure plate and the pressure reducing unit form a second speed-increasing air duct, and the radial ventilation area of ​​the second speed-increasing air duct is reduced due to the increase of the second pressure plate, thereby pressurizing and increasing the speed of the airflow; wherein, the motor drives the fan blades to rotate to generate negative pressure at the air inlet end to guide the airflow to the first speed-increasing air duct; the airflow is pressurized by the first pressure plate on the first outer ring and guided to the second speed-increasing air duct; the airflow is pressurized and blown out through the second pressure plate in the second speed-increasing air duct; so that the air volume and air supply distance are increased after the airflow is accelerated through the first speed-increasing air duct and the second speed-increasing air duct.

[0008] Furthermore, the first pressure plate is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure plate of the first speed-increasing air duct guides the airflow forward or gathers the airflow in the reverse direction to the second speed-increasing air duct, and the second pressure plate is distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressure plate gathers the airflow in the reverse direction or blows it out in the forward direction, thereby achieving the effect of pressurizing and gathering the airflow.

[0009] Furthermore, the motor includes a stator and a rotor, the stator is fixed on the motor mounting seat, the rotor is arranged on the fan blades, and the rotor is sleeved on the stator.

[0010] Furthermore, the motor mounting seat is provided with a convex column extending axially and hollow inside; the fan blades include a hub portion and blades evenly arranged on the outer peripheral surface of the hub portion, and the hub portion has a receiving portion recessed inwardly; the stator includes an iron core inserted on the convex column and a coil wound on the iron core; the rotor includes a rotating shaft axially arranged in the receiving portion and a magnetic ring attached to the radial inner wall of the receiving portion, and the rotating shaft is inserted in the convex column.

[0011] Furthermore, it includes a driving circuit board, which is electrically connected to the motor to drive the motor to drive the fan blades to rotate, and the airflow is accelerated through the first speed-increasing air duct and the second speed-increasing air duct in sequence and then blown out.

[0012] Furthermore, it includes an outer shell, which is provided with a hollow accommodating portion along the air inlet end to the air outlet end, and at least a portion of the accommodating portion extends to the first shell or the second shell; to form a package that wraps the first shell or the first shell and the second shell, or to form a package contained in the first shell or the first shell and the second shell.

[0013] Furthermore, the blades of the fan are distributed counterclockwise from the air inlet end to the air outlet end.

[0014] Furthermore, it includes a power supply interface for providing power, and the power supply interface is electrically connected to the driving circuit board.

[0015] Furthermore, the housing is provided with an air inlet grille at the air inlet end, and the air inlet grille includes connecting strips evenly distributed around the circumference, and the connecting strips radially extend and connect to the inner wall of the housing to form a gap to prevent foreign matter from entering.

[0016] Furthermore, it includes a battery, which is electrically connected to the power supply interface to charge the battery and store electricity.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. A dual-speed increasing air duct form is adopted. When the airflow passes through the first speed increasing air duct, the first pressure plate arranged in the first speed increasing air duct causes the radial ventilation area to become smaller to realize the pressurization of the airflow. At the same time, the first speed increasing air duct is located at the air inlet end, thereby being able to absorb the surrounding air and increase the air volume. When the airflow passes through the second speed increasing air duct, the airflow is further pressurized in the second stage under the action of the second pressure plate of the second speed increasing air duct. At the position of the second speed increasing air duct, the outer wall of the second outer ring radially contracts from the air inlet end to the air outlet end to form an outer air guide surface to pressurize and increase the speed of the airflow, and the outer wall of the boost seat extends with equal diameter from the air inlet end to the air outlet end to form an inner air guide surface to supply air to the airflow, thereby realizing the increase of the air volume and the air supply distance of the airflow.

[0019] 2. The first pressure plate in the first speed-increasing air duct is set to be distributed clockwise or counterclockwise, and the second pressure plate in the second speed-increasing air duct is set to be distributed counterclockwise or clockwise. With the combined effect of the two, it is possible to guide the airflow first and then gather the air, and adjust the direction of the airflow; or to gather the airflow first and then guide the air, and adjust the direction of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0022] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0023] Figure 4 2 is a schematic diagram of the first shell structure.

[0024] Figure 5 2 is a schematic diagram of the second shell structure.

[0025] Figure 6 It is a schematic cross-sectional structural diagram of the present utility model.

[0026] Figure 7 yes Figure 6 Schematic diagram of the local enlarged structure.

[0027] Figure 8 It is a structural schematic diagram of the first shell and the second shell.

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

[0029] Figure 10 It is a structural diagram of the fan blades and rotor.

[0030] Figure 11 It is a structural diagram of the stator.

[0031] Figure 12 It is a structural diagram of the shell.

[0032] Figure markings: 1. Motor mounting seat; 2. Motor; 3. Fan blade; 4. First shell; 5. First outer ring; 6. First pressure plate; 7. First speed-increasing air duct; 8. Second shell; 9. Second outer ring; 10. Pressure seat; 11. Second pressure plate; 12. Second speed-increasing air duct; 13. Outer air guide surface; 14. Inner air guide surface; 15. Stator; 16. Rotor; 17. Boss; 18. Hub; 19. Blade; 20. Storage part; 21. Iron core; 22. Coil; 23. Rotating shaft; 24. Magnetic ring; 25. Drive circuit board; 26. Shell; 27. Accommodation part; 28. Power supply interface; 29. ​​Air inlet grille; 30. Battery. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used 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", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application 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 operate in a specific orientation, and therefore should not be construed as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" or "multiple" means two or more, unless otherwise specifically defined. In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a lower level than the second feature.

[0035] like Figure 1-7As shown, an internal straight and external oblique accelerated airflow mixed flow generator is provided, comprising: a motor mounting seat 1; a motor 2, the motor 2 being arranged on the motor mounting seat 1; a fan blade 3, the fan blade 3 being arranged on the output end of the motor 2; a first shell 4, the first shell 4 being located at the air inlet end; the first shell 4 comprising a first outer ring 5 and one or more first pressure sheets 6; the first pressure sheets 6 are distributed on the inner wall of the first outer ring 5 and extend to connect the outer peripheral edge of the motor mounting seat 1; the inner wall of the first outer ring 5, the first pressure sheet 6 and the motor mounting seat 1 form a first speed-increasing air duct 7, the first speed-increasing air duct 7 is increased by the first pressure sheet 6, resulting in a smaller radial ventilation area, thereby pressurizing and accelerating the airflow; a second shell 8, the second shell 8 is located at the air outlet end and connected to the first shell 4; the second shell 8 comprises a second outer ring 9, a boosting seat 10 and one or more second pressure sheets 11; the second pressure sheets 11 are distributed inside the second outer ring 9 The wall extends and is connected to the outer peripheral edge of the boost seat 10; the inner wall of the second outer ring 9 radially contracts from the air inlet end to the air outlet end to form an outer wind guide surface 13 to pressurize and increase the speed of the airflow; the outer wall of the boost seat 10 extends at equal diameters from the air inlet end to the air outlet end to form an inner wind guide surface 14 to supply air to the airflow; the inner wall of the second outer ring 9, the second pressure plate 11 and the boost seat 10 form a second speed-increasing air duct 12, and the second speed-increasing air duct 12 is increased by the second pressure plate 11, resulting in a smaller radial ventilation area to pressurize and increase the speed of the airflow; wherein, the motor 2 drives the fan blades 3 to rotate to generate negative pressure at the air inlet end to guide the airflow to the first speed-increasing air duct 7; the airflow is pressurized by the first pressure plate 6 on the first outer ring 5 and directed to the second speed-increasing air duct 12; the airflow is pressurized and blown out by the second pressure plate 11 in the second speed-increasing air duct 12; so that the airflow increases the air volume and air supply distance after passing through the first speed-increasing air duct 7 and the second speed-increasing air duct 12.

[0036] In view of the technical problems described in the background technology, in the above technical solution, the motor mounting seat 1 is arranged on the first shell 4, the motor mounting seat 1 and the first shell 4 can be integrally formed or be independent components, the motor mounting seat 1 can be arranged at the air inlet end position or the air outlet end position of the first shell 4, as an implementable technical method, the motor mounting seat 1 and the first shell 4 are integrally formed and the motor mounting seat 1 is arranged at the air outlet end of the first shell 4, the first pressurizing sheet 6 can be evenly distributed or unevenly distributed between the first outer ring 5 and the motor mounting seat 1, preferably, the first pressurizing sheet 6 The blades 6 are evenly distributed around the circumference. Due to the presence of the first pressurizing blade 6, the radial ventilation area of ​​the airflow passing through the first outer ring 5 becomes smaller. Since the first shell 4 is located at the air inlet end, the airflow can absorb the airflow around it, increasing the air volume; at the same time, the airflow is pressurized and the airflow speed is increased. The second shell 8 includes a second outer ring 9, a pressurizing seat 10, and a second pressurizing blade 11. The second outer ring 9, the pressurizing seat 10, and the second pressurizing blade 11 can be integrally formed or independent components. Preferably, the second outer ring 9, the pressurizing seat 10, and the second pressurizing blade 11 are integrally formed. The second shell 8 can be integral with the first shell 4 or independent components. The second pressurizing blade 11 can be evenly or unevenly distributed between the second outer ring 9 and the pressurizing seat 10. Preferably, the second pressurizing blade 11 is evenly distributed around the circumference.

[0037] Combine Figure 6 and Figure 7 The inner wall of the second outer ring 9 radially contracts from the air inlet to the air outlet, forming an outer air guide surface 13. This reduces the radial ventilation area of ​​the second outer ring 9, thereby pressurizing and accelerating the airflow. Simultaneously, the outer wall of the booster seat 10 extends radially from the air inlet to the air outlet, forming an inner air guide surface 14, which guides and delivers the airflow. The presence of the second pressurizing plate 11 in the second speed-increasing air duct 12 reduces the radial ventilation area of ​​the airflow as it passes through the second outer ring 9, further pressurizing the airflow and increasing its velocity.

[0038] During use, the motor 2 drives the fan blades 3 to rotate, and a dual-speed increasing duct form is adopted. When the airflow passes through the first speed increasing duct 7, the first pressure plate 6 provided in the first speed increasing duct 7 causes the radial ventilation area to become smaller to realize the pressurization of the airflow. At the same time, the first speed increasing duct 7 is located at the air inlet end, thereby being able to absorb the surrounding air and increase the air volume; when the airflow passes through the second speed increasing duct 12, under the action of the second pressure plate 11 of the second speed increasing duct 12, the airflow is further pressurized in the second stage. At the position of the second speed increasing duct 12, the outer wall of the second outer ring 9 radially contracts from the air inlet end to the air outlet end to form an outer air guide surface 13 to pressurize and increase the speed of the airflow, and the outer wall of the boost seat 10 extends in equal diameter from the air inlet end to the air outlet end to form an inner air guide surface 14 to supply air to the airflow, thereby increasing the air volume and air supply distance of the airflow.

[0039] refer to Figure 4 、 Figure 5 and Figure 8 As shown, the first pressure plate 6 is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure plate 6 of the first speed increasing air duct 7 guides the airflow forward or gathers the airflow in the reverse direction to the second speed increasing air duct 12, and the second pressure plate 11 is distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressure plate 11 gathers the airflow in the reverse direction or blows it out in the forward direction, thereby achieving the effect of pressurizing and gathering the airflow.

[0040] As a preferred technical solution, in an implementable manner, the first pressure plate 6 is arranged in a clockwise direction and the second pressure plate 11 is arranged in a counterclockwise direction. As the airflow is driven by the fan blades 3, the airflow moves centrifugally along the four directions of the fan blades 3. The setting direction of the first pressure plate 6 of the first speed-increasing air duct 7 is opposite to the direction of the airflow movement. The first pressure plate 6 gathers the wind moving in the four directions and changes the flow direction of the airflow. The airflow passing through the first speed-increasing air duct 7 is guided to the second speed-increasing air duct 12. The second pressure plate 11 of the second speed-increasing air duct 12 is arranged in a counterclockwise direction. Since the counterclockwise setting of the second pressure plate 11 is the same as the direction of the airflow movement, the second pressure plate 11 guides the gathered airflow, and then the wind passing through the second speed-increasing air duct 12 is blown out in the front. This avoids the airflow from being dispersed and blown out, causing air volume loss, and achieves the effect of gathering and pressurizing the air.

[0041] In another feasible manner, the first pressure plate 6 is arranged counterclockwise and the second pressure plate 11 is arranged clockwise. As the airflow is driven by the fan blades 3, the airflow moves centrifugally along the four directions of the fan blades 3. The setting direction of the first pressure plate 6 of the first speed increasing duct 7 is the same as the direction of the airflow movement. The first pressure plate 6 guides and pressurizes the wind moving in all directions. Since the clockwise setting of the second pressure plate 11 is opposite to the direction of the airflow movement, the second pressure plate 11 can gather the airflow and change the flow direction of the airflow, so that the airflow can be blown out from the front when it is blown out, avoiding the airflow from being dispersed and causing air volume loss.

[0042] Reference Figure 3 、 Figure 9 、 Figure 10 and Figure 11 As shown, the motor 2 includes a stator 15 and a rotor 16. The stator 15 is fixed to the motor mounting base 1, and the rotor 16 is arranged on the fan blades 3. The rotor 16 is sleeved on the stator 15. In practice, the motor 2 can be a brushed motor or a brushless motor.

[0043] The motor mounting base 1 is provided with a boss 17 extending axially and having a hollow interior; the fan blade 3 includes a hub portion 18 and blades 19 evenly arranged on the outer peripheral surface of the hub portion 18, and the hub portion 18 has a receiving portion 20 recessed inwardly; the stator 15 includes an iron core 21 inserted on the boss 17 and a coil 22 wound on the iron core 21; the rotor 16 includes a rotating shaft 23 axially arranged on the receiving portion 20 and a magnetic ring 24 attached to the radial inner wall of the receiving portion 20, and the rotating shaft 23 is inserted in the boss 17.

[0044] Preferably, as an implementable technical solution, the motor 2 adopts an outer rotor brushless motor. Structurally, the hub 18 of the fan blade 3 is provided with a storage portion 20, and the fan blade 3 is used as the installation position of the rotor 16. The magnetic ring 24 and the rotating shaft 23 of the rotor 16 are arranged at the storage portion 20 position, thereby optimizing the structure and saving the number of components. At the same time, a hollow boss 17 is provided on the motor mounting seat 1 to facilitate the insertion of the rotating shaft 23 into the boss 17 for positioning. At the same time, the iron core 21 and the coil 22 of the stator 15 can be sleeved on the boss 17 for positioning. The fan blade 3 is driven by the designed outer rotor brushless motor structure, which can be more compact in structure, save the number of components, and thus reduce costs.

[0045] refer to Figure 3 As shown, the utility model also includes a driving circuit board 25, which is electrically connected to the motor 2 to drive the motor 2 to drive the fan blades 3 to rotate, and the air flow is accelerated through the first speed-increasing air duct 7 and the second speed-increasing air duct 12 in sequence and then blown out.

[0046] In implementation, the driving circuit board 25 can be built-in or external. When built-in, it can be installed on the first shell 4 and the second shell 8. When external, it can be installed by setting up an additional shell. There is no limitation on this. The driving circuit board 25 is mainly used to drive and control various components.

[0047] refer to Figure 3 As shown, the utility model includes a shell 26, and the shell 26 is provided with a hollow accommodating portion 27 along the air inlet end to the air outlet end, and at least a portion of the accommodating portion 27 extends to the first shell 4 or the second shell 8; to form a package for the first shell 4 or the first shell 4 and the second shell 8, or to form a package in the first shell 4 or the first shell 4 and the second shell 8.

[0048] In a further technical solution, a shell 26 is added. The shell 26 is a hollow structure forming a accommodating portion 27. The shell 26 can be set on one side of the first shell 4. In one implementation, the shell 26 can accommodate the first shell 4 and the second shell 8 through the accommodating portion 27; in a second implementation, the shell 26 can accommodate the first shell 4; in a third implementation, the accommodating portion 27 of the shell 26 can be accommodated in the first shell 4 and the second shell 8; in a fourth implementation, the shell 26 can be accommodated in the first shell 4.

[0049] Preferably, the blades 19 of the fan blade 3 are distributed counterclockwise from the air inlet end to the air outlet end. When the motor 2 rotates, the fan blade 3 is driven to rotate counterclockwise, so that the airflow direction entering the first speed-increasing air duct 7 is counterclockwise.

[0050] like Figure 3 As shown, it includes a power supply interface 28 for providing power, and the power supply interface 28 is electrically connected to the driving circuit board 25. The power supply interface 28 can be used as a connecting wire, such as using a plug and a socket to connect for power supply.

[0051] Preferably, the housing 26 is provided with an air inlet grille 29 at the air inlet end. The air inlet grille 29 includes connecting strips evenly distributed around the circumference. The connecting strips radially extend and connect to the inner wall of the housing 26 to form a gap to prevent foreign matter from entering.

[0052] Specifically, it includes a battery 30, and the battery 30 is electrically connected to the power supply interface 28 to charge and store electricity in the battery 30. Among them, the utility model further includes a battery 30, which can be powered by the power supply interface 28 to achieve battery life.

[0053] 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 internal straight and external oblique accelerated airflow mixed flow generator, characterized in that: include: Motor mount; a motor, the motor being arranged on the motor mounting seat; fan blades, the fan blades being arranged on the output end of the motor; A first shell, the first shell being located at the air inlet end; the first shell comprising a first outer ring and one or more first pressure sheets; the first pressure sheets being distributed on the inner wall of the first outer ring and extending to connect to the outer peripheral edge of the motor mounting seat; the inner wall of the first outer ring, the first pressure sheet, and the motor mounting seat forming a first speed-increasing air duct, wherein the first speed-increasing air duct is increased by the first pressure sheet, resulting in a smaller radial ventilation area, thereby pressurizing and accelerating the airflow; A second shell, the second shell is located at the air outlet end and is connected to the first shell; the second shell includes a second outer ring, a booster seat and one or more second pressure plates; the second pressure plates are distributed on the inner wall of the second outer ring and extend to the outer peripheral edge of the booster seat; the inner wall of the second outer ring radially contracts from the air inlet end to the air outlet end to form an outer wind guide surface to pressurize and increase the speed of the airflow; the outer wall of the booster seat extends with equal diameter from the air inlet end to the air outlet end to form an inner wind guide surface to supply air to the airflow; the inner wall of the second outer ring, the second pressure plate and the booster seat form a second speed-increasing air duct, and the second speed-increasing air duct is increased by the second pressure plate, resulting in a smaller radial ventilation area to pressurize and increase the speed of the airflow; Among them, the motor drives the fan blades to rotate to generate negative pressure at the air inlet end to guide the airflow to the first speed-increasing air duct; the airflow is pressurized by the first pressure plate on the first outer ring and guided to the second speed-increasing air duct; the airflow is pressurized and blown out through the second pressure plate in the second speed-increasing air duct; so that the air volume and air supply distance are increased after the airflow is accelerated through the first speed-increasing air duct and the second speed-increasing air duct.

2. The inner straight and outer oblique accelerated airflow mixed flow generator according to claim 1, characterized in that: The first pressure plate is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure plate of the first speed-increasing air duct guides the airflow forward or gathers the airflow in the reverse direction to the second speed-increasing air duct, and the second pressure plate is distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressure plate gathers the airflow in the reverse direction or blows it out in the forward direction, thereby achieving the effect of pressurizing and gathering the airflow.

3. The inner straight and outer oblique accelerating airflow mixed flow generator according to claim 1, characterized in that: The motor includes a stator and a rotor, wherein the stator is fixed on the motor mounting seat, and the rotor is arranged on the fan blades, and the rotor is sleeved on the stator.

4. The inner straight and outer oblique accelerating airflow mixed flow generator according to claim 3, characterized in that: The motor mounting seat is provided with a convex column extending in the axial direction and having a hollow interior; The fan blade includes a hub portion and blades evenly arranged on the outer circumference of the hub portion, and the hub portion has a receiving portion that is recessed inwardly; The stator includes an iron core inserted on the protruding column and a coil wound on the iron core; The rotor includes a rotating shaft axially arranged on the receiving portion and a magnetic ring attached to the radial inner wall of the receiving portion, and the rotating shaft is inserted into the protruding column.

5. The inner straight and outer oblique accelerating airflow mixed flow generator according to claim 2 or 4, characterized in that: It includes a driving circuit board, which is electrically connected to the motor to drive the motor to drive the fan blades to rotate, and the air flow is accelerated through the first speed-increasing air duct and the second speed-increasing air duct in sequence and then blown out.

6. The inner straight and outer oblique accelerating airflow mixed flow generator according to claim 5, characterized in that: The housing comprises a hollow receiving portion provided along the air inlet end to the air outlet end, wherein at least a portion of the receiving portion extends to the first housing or the second housing; To form a package that wraps the first shell or the first shell and the second shell, or to form a package that is accommodated in the first shell or the first shell and the second shell.

7. The inner straight and outer oblique accelerating airflow mixed flow generator according to claim 5, characterized in that: The blades of the fan are distributed counterclockwise from the air inlet end to the air outlet end.

8. The internally straight and externally inclined accelerating airflow mixed flow generator according to claim 5, characterized in that: A power supply interface is included for providing power, and the power supply interface is electrically connected to the driving circuit board.

9. The inner straight and outer oblique accelerating airflow mixed flow generator according to claim 6, characterized in that: The housing is provided with an air inlet grille at the air inlet end. The air inlet grille includes connecting strips evenly distributed around the circumference. The connecting strips extend radially and are connected to the inner wall of the housing to form a gap to prevent foreign matter from entering.

10. The inner straight and outer inclined accelerating airflow mixed flow generator according to claim 8, characterized in that: A battery is included, and the battery is electrically connected to the power supply interface so as to charge the battery and store electricity.

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