Pressurizing mixed flow fan capable of being shaped in bending mode

Abstract

The utility model relates to the technical field of fans, and discloses a bendable pressurizing mixed flow fan which comprises a fan head, a support and a deformation strip assembly. The fan head comprises a first shell, a second shell, a first motor and fan blades. The first shell comprises a first outer ring, a motor mounting seat and a first pressurizing sheet; the first motor is arranged on the motor mounting seat; the fan blades are arranged at the output end of the first motor; 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 second shell comprises a second outer ring, a pressurizing seat and a second pressurizing sheet; 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, in particular to a pressurized mixed-flow fan with a bendable shape. Background Art

[0002] A fan is a household appliance that uses an electric motor to drive the blades to rotate to accelerate the circulation of air. It is mainly used to cool down and circulate air, and is widely used in homes, classrooms, offices and other places.

[0003] Currently, fans used on the market use axial-flow fans. Axial-flow fans are characterized by airflow flowing in and out in the same direction, typically along the fan's central axis. In practice, low pressure results in a short airflow distance, especially in desktop fans. Furthermore, due to application limitations, some desktop fans cannot be connected to certain pipe-type installations, resulting in poor applicability and hindering widespread adoption.

[0004] Therefore, improvements need to be made to this. Utility Model Content

[0005] The technical problem solved by the present invention is to provide a pressurized mixed flow fan with a bendable shape to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a bendable pressurized mixed flow fan, comprising: a fan head for generating airflow, a bracket for supporting the fan head and a deformation bar assembly for being bent and fixed to the outside world; wherein, at least a portion of the bracket is hinged to the fan head, and the deformation bar assembly is connected to the bracket; the fan head comprises a first shell, a second shell, a first motor and fan blades; the first shell is located at the air inlet end; the first shell comprises a first outer ring, a motor mounting seat and one or more first pressure plates; the first motor is arranged on the motor mounting seat; the fan blades are arranged on the output end of the first motor; the first pressure plates 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 plate and the motor mounting seat form a first speed-increasing air duct, and the first speed-increasing air duct passes through the first pressure plate The increase causes the radial ventilation area to become smaller, thereby pressurizing and accelerating the airflow; a second shell, the second shell is arranged at the air outlet end of 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, 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, thereby pressurizing and accelerating the airflow; wherein, the first 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 by 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 passes through the first speed-increasing air duct and the second speed-increasing air duct.

[0007] Furthermore, a first transition surface that radially increases from the air inlet direction to the air outlet direction is provided at the circumferential position of the motor mounting seat; a second transition surface that radially increases from the air inlet direction to the air outlet direction is provided at the circumferential position of the boost seat; the first transition surface and the second transition surface are arranged to form a uniformly transitioned arc surface or inclined surface to guide the airflow.

[0008] Furthermore, the second outer ring is provided with a third transition surface close to the air outlet direction, which radially contracts from the air inlet direction to the air outlet direction. The third transition surface and the second transition surface gather and pressurize the airflow.

[0009] 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.

[0010] Furthermore, the first motor includes a stator and a rotor, the stator is fixed on the motor mounting seat, the rotor is arranged on the fan blade, and the rotor is sleeved on the stator.

[0011] 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.

[0012] Furthermore, a face cover is provided on one side of the boost seat close to the air outlet end, an installation space is provided between the face cover and the boost seat, a digital display panel is provided in the installation space, and the digital display panel is used to display and / or control parameters.

[0013] Furthermore, it includes an air inlet grille, 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 that is accommodated in the first shell or the first shell and the second shell.

[0014] Furthermore, the deformation bar assembly includes a base block installed on the bracket and a support leg connected to the base block; there is more than one support leg; a mounting hole is provided on the base block, and one end of the support leg is embedded in the mounting hole.

[0015] Furthermore, a battery is included, and the battery is used to supply power to the electronic components.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. A deformation bar assembly is set on the fan. The deformation bar assembly can change its shape under the action of external force, so that it can be placed on a desktop or wrapped around a pipe. It can be applied to a variety of scenarios and has better applicability. At the same time, a bracket is hinged to the fan head on the deformation bar to facilitate adjustment of the air outlet direction of the fan head.

[0018] 2. The fan head adopts a dual-speed increasing air duct. When the airflow passes through the first speed increasing air duct, the first pressure plate provided in the first speed increasing air duct causes the radial ventilation area to become smaller to pressurize 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 second pressure plate provided in the second speed increasing air duct causes the radial ventilation area to become smaller, further pressurizing and blowing out the airflow in the second section, thereby increasing the air volume and air supply distance of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the utility model.

[0020] Figure 2 This is a structural schematic diagram of the utility model from another angle.

[0021] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0022] Figure 4 This is a schematic diagram of the exploded structure of the fan head.

[0023] Figure 5 2 is a schematic diagram of the first shell structure.

[0024] Figure 6 Schematic diagram of the second shell structure.

[0025] Figure 7 This is a cross-sectional view of the fan head.

[0026] Figure 8 This is a cross-sectional view of the fan head.

[0027] Figure 9 It is a structural diagram of the fan blade.

[0028] Figure 10 It is a structural diagram of the rotor and fan blades.

[0029] Figure 11 It is a structural diagram of the stator.

[0030] Figure 12 It is a structural diagram of the air intake grille.

[0031] Figure 13 It is a structural diagram of the deformation bar component.

[0032] Figure markings: 1. fan head; 2. bracket; 3. deformation bar assembly; 4. first shell; 5. second shell; 6. first motor; 7. fan blade; 8. first outer ring; 9. motor mounting seat; 10. first pressure plate; 11. first speed-increasing air duct; 12. second outer ring; 13. boost seat; 14. second pressure plate; 15. second speed-increasing air duct; 16. first transition surface; 17. second transition surface; 18. third transition surface; 19. stator; 20. rotor; 21. boss; 22. hub; 23. blade; 24. storage portion; 25. iron core; 26. coil; 27. rotating shaft; 28. magnetic ring; 29. ​​cover; 30. digital display panel; 31. air inlet grille; 32. accommodating portion; 33. base block; 34. support leg; 35. mounting hole; 36. 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] As shown in the figure, a bendable pressurized mixed flow fan is provided, comprising: a fan head 1 for generating airflow, a bracket 2 for supporting the fan head 1, and a deformable bar assembly 3 for being bent and fixed to the outside world; wherein, at least a portion of the bracket 2 is hinged to the fan head 1, and the deformable bar assembly 3 is connected to the bracket 2; the fan head 1 comprises a first shell 4, a second shell 5, a first motor 6 and fan blades 7; the first shell 4 is located at the air inlet end; the first shell 4 comprises a first outer ring 8, a motor mounting seat 9 and one or more first pressure plates 10; the first motor 6 is arranged on the motor mounting seat 9; the fan blades 7 are arranged on the output end of the first motor 6; the first pressure plate 10 is distributed on the inner wall of the first outer ring 8 and extends to connect the outer peripheral edge of the motor mounting seat 9; the inner wall of the first outer ring 8, the first pressure plate 10 and the motor mounting seat 9 form a first speed-increasing air duct 11, and the first speed-increasing air duct 11 is increased by the first pressure plate 10, resulting in a smaller radial ventilation area Forming a pressurized and accelerated airflow; a second shell 5, the second shell 5 is arranged at the air outlet end of the first shell 4; the second shell 5 includes a second outer ring 12, a boost seat 13 and one or more second pressurizing plates 14; the second pressurizing plates 14 are distributed on the inner wall of the second outer ring 12 and extend to be connected to the outer peripheral edge of the boost seat 13; the inner wall of the second outer ring 12, the second pressurizing plate 14 and the boost seat 13 form a second speed-increasing air duct 15, and the second speed-increasing air duct 15 is increased by the second pressurizing plate 14, resulting in a smaller radial ventilation area, thereby pressurizing and accelerating the airflow; wherein, the first motor 6 drives the fan blades 7 to rotate to generate negative pressure at the air inlet end to guide the airflow to the first speed-increasing air duct 11; the airflow is pressurized by the first pressurizing plate 10 in the first outer ring 8 and guided to the second speed-increasing air duct 15; the airflow is pressurized and blown out by the second pressurizing plate 14 in the second speed-increasing air duct 15, so that the airflow increases the air volume and air supply distance after passing through the first speed-increasing air duct 11 and the second speed-increasing air duct 15.

[0036] In view of the technical problems described in the background art, a pressurized mixed-flow fan with a bendable shape is proposed, which mainly includes a fan head 1, a bracket 2 and a deformation strip assembly 3.

[0037] The bracket 2 can be U-shaped or V-shaped, with at least a portion of the bracket 2 hingedly connected to the fan head 1. Preferably, when a U-shaped structure is adopted, both ends of the bracket 2 are hingedly connected to the two sides of the fan head 1. During use, the fan head 1 can rotate relative to the bracket 2 under the action of an external force, thereby adjusting the air outlet direction of the fan head 1.

[0038] The deformable bar assembly 3 is primarily made of a deformable material, such as metals like iron and aluminum, or non-metallic materials. Its primary function is to change shape under the action of external forces to accommodate various usage scenarios. For example, in a desktop scenario, the deformable bar assembly 3 can be modified to create a structure capable of storage. In a pipe scenario, the deformable bar assembly 3 can be modified to wrap around the pipe for secure installation. Users can also bend the bar into various shapes to achieve a variety of shape changes based on their own needs.

[0039] The fan head 1 is used to drive and generate airflow. The fan head 1 mainly includes a first housing 4, a second housing 5, a first motor 6 and fan blades 7.

[0040] As shown in the figure, the first shell 4 includes a motor mounting seat 9, a first pressure plate 10 and a first outer ring 8. The motor mounting seat 9 and the first outer ring 8 can be integrally formed or independent components. The motor mounting seat 9 can be set at the air inlet end or the air outlet end of the first outer ring 8. As an implementable technical method, the motor mounting seat 9 and the first outer ring 8 are integrally formed and the motor mounting seat 9 is set at the air outlet end of the first outer ring 8. The first pressure plate 10 can be evenly distributed or unevenly distributed between the first outer ring 8 and the motor mounting seat 9. Preferably, the first pressure plate 10 is evenly distributed around the circumference. Due to the presence of the first pressure plate 10, the radial ventilation area of ​​the airflow passing through the first outer ring 8 becomes smaller, and the first shell 4 is located at the air inlet end. The airflow can absorb the airflow around to increase the air volume; at the same time, the airflow is pressurized to increase the airflow speed.

[0041] As shown in the figure, the second housing 5 includes a second outer ring 12, a pressurizing seat 13, and a second pressurizing plate 14. The second outer ring 12, pressurizing seat 13, and second pressurizing plate 14 can be integrally formed or separate components. Preferably, the second outer ring 12, pressurizing seat 13, and second pressurizing plate 14 are integrally formed. The second housing 5 can be integrally formed with the first housing 4 or separate components. The second pressurizing plate 14 can be evenly or unevenly distributed between the second outer ring 12 and the pressurizing seat 13. Preferably, the second pressurizing plate 14 is evenly distributed around the circumference. The presence of the second pressurizing plate 14 in the second speed-increasing air duct 15 reduces the radial ventilation area of ​​the airflow passing through the second outer ring 12, further pressurizing the airflow and increasing its velocity.

[0042] In this way, by setting up a double speed-increasing air duct form, when the flow passes through the first speed-increasing air duct 11, the first pressure plate 10 set in the first speed-increasing air duct 11 causes the radial ventilation area to become smaller to achieve pressurization of the airflow. At the same time, the first speed-increasing air duct 11 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 15, the second pressure plate 14 set in the second speed-increasing air duct 15 causes the radial ventilation area to become smaller, further pressurizing and blowing out the airflow in the second stage, thereby increasing the air volume and air supply distance.

[0043] As shown in the reference figure, the circumferential position of the motor mounting seat 9 is provided with a first transition surface 16 that radially increases from the air inlet direction to the air outlet direction; the circumferential position of the boost seat 13 is provided with a second transition surface 17 that radially increases from the air inlet direction to the air outlet direction; the first transition surface 16 and the second transition surface 17 are arranged in contact with each other to form a uniformly transitioned arc surface or inclined surface to guide the airflow.

[0044] As a preferred embodiment, the outer circumference of the motor mounting seat 9 is provided with a first transition surface 16 from the air inlet direction to the air outlet direction, and the outer circumference of the boost seat 13 is provided with a second transition surface 17 from the air inlet direction to the air outlet direction. The first transition surface 16 and the second transition surface 17 are radially enlarged from the air inlet direction to the air outlet direction and are arranged close to each other. Through this structural setting, the first transition surface 16 and the second transition surface 17 are close to each other to form an arc surface form or a slope form, and there is no gap between the first transition surface 16 and the second transition surface 17. On the one hand, the airflow is guided to be blown out through the first transition surface 16 and the second transition surface 17 during the blowing process. Due to its radially enlarged structure, the airflow can be pressurized, the wind pressure of the airflow can be increased, and the air supply distance can be increased. On the other hand, since the first transition surface 16 and the second transition surface 17 are close to each other, the wind noise can be reduced, and the airflow can be guided to be blown out.

[0045] Furthermore, the second outer ring 12 is provided with a third transition surface 18 radially contracting from the air inlet direction to the air outlet direction near the air outlet direction. The third transition surface 18 and the second transition surface 17 gather and pressurize the airflow.

[0046] A radially contracting third transition surface 18 is provided on the inner wall of the second outer ring 12 close to the air outlet direction. The third transition surface 18 may be an arc surface or an inclined surface. Structurally, since the second transition surface 17 is radially enlarged and the third transition surface 18 is radially contracted, a necking shape is formed. When the airflow passes through the second transition surface 17 and the third transition surface 18, the airflow is pressurized, the wind pressure of the airflow is increased, and the air supply distance is increased.

[0047] As shown in the figure, the first pressure plate 10 is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure plate 10 of the first speed-increasing air duct 11 guides the airflow forward or gathers the airflow in the reverse direction to the second speed-increasing air duct 15, and the second pressure plate 14 is distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressure plate 14 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.

[0048] In one practicable embodiment, the first pressure plate 10 is arranged in a clockwise direction and the second pressure plate 14 is arranged in a counterclockwise direction. As the airflow is driven by the fan blades 7, the airflow moves centrifugally along the surrounding directions of the fan blades 7. The setting direction of the first pressure plate 10 of the first speed-increasing air duct 11 is opposite to the direction of the airflow. The first pressure plate 10 gathers the wind moving in the surrounding directions and changes the flow direction of the airflow. The airflow passing through the first speed-increasing air duct 11 is guided to the second speed-increasing air duct 15. The second pressure plate 14 of the second speed-increasing air duct 15 is arranged in a counterclockwise direction. Since the counterclockwise setting of the second pressure plate 14 is the same as the direction of the airflow, the second pressure plate 14 guides the gathered airflow and blows the air through the second speed-increasing air duct 15 out in a forward direction. This avoids the airflow from being dispersed and blown out, resulting in air volume loss, and achieves the effect of wind gathering and pressure increase.

[0049] In another feasible manner, the first pressure plate 10 is arranged counterclockwise and the second pressure plate 14 is arranged clockwise. As the airflow is driven by the fan blades 7, the airflow moves centrifugally along the four directions of the fan blades 7. The first pressure setting direction of the first speed increasing duct 11 is the same as the direction of the airflow movement. The first pressure plate 10 guides and pressurizes the wind moving in all directions. Since the clockwise setting of the second pressure plate 14 is opposite to the direction of the airflow movement, the second pressure plate 14 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 being dispersed and causing air volume loss.

[0050] As shown in the figure, the first motor 6 includes a stator 19 and a rotor 20. The stator 19 is fixed to the motor mounting base 9, and the rotor 20 is arranged on the fan blade 7. The rotor 20 is sleeved on the stator 19. In practice, the first motor 6 can be a brushed motor or a brushless motor.

[0051] The motor mounting seat 9 is provided with a boss 21 extending axially and hollow inside; the fan blade 7 includes a hub portion 22 and blades 23 evenly arranged on the outer peripheral surface of the hub portion 22, and the hub portion 22 has a receiving portion 24 recessed inwardly; the stator 19 includes an iron core 25 inserted on the boss 21 and a coil 26 wound on the iron core 25; the rotor 20 includes a rotating shaft 27 axially arranged on the receiving portion 24 and a magnetic ring 28 attached to the radial inner wall of the receiving portion 24, and the rotating shaft 27 is inserted in the boss 21.

[0052] Preferably, as an implementable technical solution, the first motor 6 adopts an outer rotor brushless motor. Structurally, the hub portion 22 of the fan blade 7 is provided with a storage portion 24, and the fan blade 7 is used as the installation position of the rotor 20. The magnetic ring 28 and the rotating shaft 27 of the rotor 20 are arranged at the storage portion 24 position, thereby optimizing the structure and saving the number of components. At the same time, a hollow boss 21 is provided on the motor mounting seat 9 to facilitate the insertion of the rotating shaft 27 into the boss 21 for positioning. At the same time, the iron core 25 and the coil 26 of the stator 19 can be sleeved on the boss 21 for positioning. The fan blade 7 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.

[0053] A surface cover 29 is provided on one side of the booster seat 13 close to the air outlet end. An installation space is provided between the surface cover 29 and the booster seat. A digital display panel 30 is provided in the installation space. The digital display panel 30 is used to display and / or control parameters.

[0054] The booster seat 13 is provided with an installation space, in which a digital display panel 30 is provided. The digital display panel 30 can be designed to control the rotation of the first motor 6, display the capacity of the battery 36, etc. When in use, an external power supply can be used, and the user can drive and control the digital display panel 30, or a built-in battery 36 can be used for power supply. Preferably, the battery 36 can be built into the booster seat 13, and the digital display panel 30 can also display the power level of the battery 36.

[0055] As shown in the figure, it includes an air inlet grille 31, and the air inlet grille 31 is provided with a hollow accommodating portion 32 along the air inlet end to the air outlet end, and at least a portion of the accommodating portion 32 extends to the first shell 4 or the second shell 5; to form a package that wraps the first shell 4 or the first shell 4 and the second shell 5, or to form a package that is accommodated in the first shell 4 or the first shell 4 and the second shell 5.

[0056] An air inlet grille 31 is added. The air inlet grille 31 is a hollow structure with a receiving portion 32. The air inlet grille 31 can be set on one side of the first housing 4. In a first embodiment, the air inlet grille 31 can accommodate the first housing 4 and the second housing 5 through the receiving portion 32. In a second embodiment, the air inlet grille 31 can accommodate the first housing 4 through the receiving portion 32. In a third embodiment, the receiving portion 32 of the air inlet grille 31 can be accommodated within the first housing 4 and the second housing 5. In a fourth embodiment, the receiving portion 32 of the air inlet grille 31 can be accommodated within the first housing 4. Preferably, the present invention adopts the fourth embodiment, and the air inlet grille 31 is used to prevent foreign matter from entering the interior of the fan head 1.

[0057] As shown in the figure, the deformation bar assembly 3 includes a base block 33 installed on the bracket 2 and a support leg 34 connected to the base block 33; there are more than one support leg 34; a mounting hole 35 is provided on the base block 33, and one end of the support leg 34 is embedded in the mounting hole 35.

[0058] In practice, the above provides an implementable deformation bar assembly 3 structure. The base block 33 can be fixed to the bracket 2 by screws. The legs 34 can be selected in one or more forms. There is no limit on the number of legs 34. In this embodiment, three legs 34 are selected. The base block 33 is provided with mounting holes 35 for mounting the legs 34. When in use, one end of the leg 34 is placed in the mounting hole 35, and one end of the leg 34 can be rotated in the mounting hole 35. When in use, the user can bend and deform the leg 34 according to the usage scenario to meet the needs.

[0059] The battery 36 is included, and the battery 36 is used to power the electronic components. The battery 36 can be built-in or external. Preferably, the battery 36 is built-in in the booster seat 13 for use.

[0060] 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. A bendable boost mixed flow fan, characterized in that: include: A fan head for generating airflow, a bracket for supporting the fan head, and a deformable strip assembly for bending and connecting to the outside world; Wherein, at least a portion of the bracket is hinged to the fan head, and the deformation bar assembly is connected to the bracket; The fan head includes a first shell, a second shell, a first motor and fan blades; The first shell is located at the air inlet end; the first shell includes a first outer ring, a motor mounting seat and one or more first pressure plates; the first motor is arranged on the motor mounting seat; the fan blades are arranged on the output end of the first motor; the first pressure plates 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 plate and the motor mounting seat form a first speed-increasing air duct, and the first speed-increasing air duct is increased by the first pressure plate, resulting in a smaller radial ventilation area, thereby pressurizing and accelerating the airflow; A second shell, the second shell being arranged at the air outlet end of the first shell; the second shell comprising a second outer ring, a boost seat, and one or more second pressurizing sheets; the second pressurizing sheets being distributed on the inner wall of the second outer ring and extending to connect to the outer peripheral edge of the boost seat; the inner wall of the second outer ring, the second pressurizing sheet, and the boost seat forming a second speed-increasing air duct, wherein the radial ventilation area of ​​the second speed-increasing air duct is reduced due to the increase of the second pressurizing sheet, thereby pressurizing and accelerating the airflow; Among them, the first 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 airflow increases the air volume and air supply distance after passing through the first speed-increasing air duct and the second speed-increasing air duct.

2. The flexible boost mixed flow fan according to claim 1, characterized in that: The circumferential position of the motor mounting seat is provided with a first transition surface that radially increases from the air inlet direction to the air outlet direction; the circumferential position of the boost seat is provided with a second transition surface that radially increases from the air inlet direction to the air outlet direction; the first transition surface and the second transition surface are arranged in contact with each other to form a uniformly transitioned arc surface or inclined surface to guide the airflow.

3. The flexible boost mixed flow fan according to claim 2, characterized in that: The second outer ring is provided with a third transition surface near the air outlet direction, which is radially contracted from the air inlet direction to the air outlet direction. The third transition surface and the second transition surface focus and pressurize the airflow.

4. The flexible boost mixed flow fan 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.

5. The flexible boost mixed flow fan according to claim 1, characterized in that: The first 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 is sleeved on the stator.

6. The flexible boost mixed flow fan according to claim 5, 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.

7. The flexible boost mixed flow fan according to any one of claims 1 to 6, characterized in that: A face cover is provided on one side of the boost seat close to the air outlet end, an installation space is provided between the face cover and the boost seat, a digital display panel is provided in the installation space, and the digital display panel is used to display and / or control parameters.

8. The flexible boost mixed flow fan according to claim 7, characterized in that: It includes an air inlet grille, 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 form that wraps the first shell or the first shell and the second shell, or to form a form that is accommodated in the first shell or the first shell and the second shell.

9. The bendable boost mixed flow fan according to claim 1, characterized in that: The deformation bar assembly includes a base block mounted on the bracket and a support leg connected to the base block; there is more than one support leg; a mounting hole is provided on the base block, and one end of the support leg is embedded in the mounting hole.

10. The flexible boost mixed flow fan according to claim 7, characterized in that: A battery is included, and the battery is used to power electronic components.

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