Pressurized mixed flow handheld folding fan

Abstract

The utility model relates to the technical field of handheld fans, and discloses a pressurizing mixed flow handheld folding fan which comprises a fan head and a handle. The fan head comprises a first shell, a second shell, a motor and fan blades. The first shell comprises a first outer ring, a motor mounting seat and a first pressurizing sheet; 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 second outer ring, the second pressurizing sheet and the pressurizing seat form a second accelerating 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 hand-held fans, in particular to a pressurized mixed-flow hand-held folding fan. Background Technique

[0002] The hand-held fan has the advantages of being easy to carry and convenient for outdoor use. It is especially popular among users in the hot summer.

[0003] In the current hand-held fans, the air outlet mode adopted is that the air inlet direction is the same as the air outlet direction, usually along the axial direction of the fan center. This air outlet mode has the disadvantages of low air pressure and small air supply range. At the same time, the hand-held fan is of an integral structure, and the air outlet direction cannot be adjusted, resulting in inconvenient use.

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

[0005] The technical problem solved by the utility model is to provide a pressurized mixed-flow hand-held folding fan to solve the problems raised in the above background technique in view of the defects existing in the above-mentioned prior art.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A pressurized mixed-flow hand-held folding fan, comprising: a fan head for driving to generate air flow and a handle for hand-holding or placing on a table; wherein, at least a part of the fan head is hinged to the handle, and the fan head can rotate around the handle to adjust the air outlet direction; wherein, a driving circuit board, a battery and a control button for control are installed in the handle; the battery and the control button are electrically connected to the driving circuit board; the control button is exposed on the outer peripheral surface of the handle; the fan head includes a first housing, a second housing, a motor and a fan blade; the first housing is located at the air inlet end; the first housing includes a first outer ring, a motor mounting seat and more than one first pressurizing piece; the motor is arranged on the motor mounting seat, and the fan blade is arranged at the output end of the motor; 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 accelerating the air flow; the second housing is located at the air outlet end of the first housing; the second housing includes a second outer ring, a pressurizing seat and more than one second pressurizing piece; the second pressurizing pieces are distributed on the inner wall of the second outer ring and extend to connect the outer periphery of the pressurizing 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 air guiding surface to pressurize and accelerate the air flow; 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 accelerating the air flow; wherein, the motor drives the fan blade to rotate to generate negative pressure at the air inlet end to guide 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 guided to the second speed-increasing air duct; the air flow is pressurized by the second pressurizing pieces in the second speed-increasing air duct and blown out; 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 for speed increase.

[0007] Further, the first pressurizing pieces are distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressurizing pieces of the first speed-increasing air duct guide the air flow in the forward direction or gather the air flow in the reverse direction to the second speed-increasing air duct, and the second pressurizing pieces are distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressurizing pieces gather the air flow in the reverse direction or blow the air flow in the forward direction, achieving the effect of pressurizing and gathering the air flow.

[0008] Further, the 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.

[0009] Further, a convex column extending axially and having a hollow interior is provided on the motor mounting seat; the fan blade includes a hub portion and blades uniformly arranged on the outer peripheral surface of the hub portion, and the hub portion has a receiving portion recessed inward; the stator includes an iron core inserted on the convex column and a coil wound around the iron core; the rotor includes a rotating shaft axially disposed in 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 convex column.

[0010] Further, it includes a housing, and the housing is provided with a hollow accommodating portion from the air inlet end to the air outlet end, and at least a part of the accommodating portion extends to the first housing or the second housing; to form a wrapping around the first housing or the first housing and the second housing, or to form an accommodation within the first housing or the first housing and the second housing.

[0011] Further, a power supply interface, and the power supply interface is electrically connected to the drive circuit board.

[0012] Further, the fan head has a protruding portion, and a rotating portion is provided on the protruding portion; the handle is disposed in a recessed portion that cooperates with the protruding portion, and a positioning hole that cooperates with the rotating portion is provided in the recessed portion; the rotating portion can be rotationally adjusted relative to the positioning hole.

[0013] Further, an air inlet grille is provided at the air inlet end of the housing, and the air inlet grille includes connecting bars evenly distributed in a circumferential manner, and the connecting bars extend radially and are connected to the inner wall of the housing to form a gap for preventing foreign objects from entering.

[0014] Further, a face cover is provided on one side of the pressurizing seat close to the air outlet end, and there is an installation space between the face cover and the pressurizing seat, and a digital display panel is provided in the installation space, and the digital display panel is used to display and / or control parameters.

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

[0016] 1. The fan head and the handle are hinged, and the fan head can be rotated relative to the handle to adjust the air outlet direction to meet the user's usage needs. A dual-speed air duct is adopted. When the airflow passes through the first speed-increasing air duct, the first pressure plate set 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 of the second speed-increasing air duct further pressurizes the airflow in the second stage. At the second speed-increasing air duct position, 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 speed up the airflow, and the outer periphery of the booster seat radially increases from the air inlet end to the air outlet end to form an inner air guide surface to pressurize and speed up the airflow. The second outer ring and the booster seat are used to form a shrinking structure from the air inlet end to the air outlet end, thereby increasing the air volume and air supply distance of the airflow.

[0017] 2. The first pressure plate in the first speed-increasing air duct is arranged to be distributed clockwise or counterclockwise, and the second pressure plate in the second speed-increasing air duct is arranged 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, thereby adjusting the direction of the airflow; or to gather the airflow first and then guide the air, thereby adjusting the direction of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the utility model from another angle.

[0020] Figure 3 It is a schematic diagram of the fan head and handle structure.

[0021] Figure 4 It is a schematic diagram of the explosion structure of the utility model.

[0022] Figure 5 It is a schematic diagram of the first shell structure.

[0023] Figure 6 2 is a schematic diagram of the second shell structure.

[0024] Figure 7 Schematic diagram of the cross-sectional structure of the fan head.

[0025] Figure 8 yes Figure 7 Schematic diagram of the local enlarged structure.

[0026] Figure 9 It is a schematic diagram of the structure of the first shell and the second shell.

[0027] Figure 10 It is a schematic diagram of the structure of the first shell and the second shell.

[0028] Figure 11 It is a schematic structural diagram of a fan blade.

[0029] Figure 12 It is a schematic structural diagram of a rotor and a fan blade.

[0030] Figure 13 It is a schematic structural diagram of a stator.

[0031] Figure 14 It is a schematic structural diagram of a housing.

[0032] Figure 15 It is a schematic structural diagram of a partial structure of the present utility model.

[0033] Reference numerals: 1, fan head; 2, handle; 3, drive circuit board; 4, battery; 5, control button; 6, first housing; 7, second housing; 8, motor; 9, fan blade; 10, first outer ring; 11, motor mounting seat; 12, first pressure plate; 13, first speed-up air duct; 14, second outer ring; 15, booster seat; 16, second pressure plate; 17, outer air guiding surface; 18, second speed-up air duct; 19, stator; 20, rotor; 21, convex column; 22, hub portion; 23, blade; 24, storage portion; 25, iron core; 26, coil; 27, rotating shaft; 28, magnetic ring; 29, housing; 30, accommodating portion; 31, power supply interface; 32, protruding portion; 33, rotating portion; 34, recessed portion; 35, positioning hole; 36, air inlet grille; 37, face cover; 38, digital display panel. Detailed implementation manners

[0034] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0035] 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 thus 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 number 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 meanings of "a number of" and "a plurality of" are two or more, unless otherwise specifically defined. In the present application, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed" 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 communication inside 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 between them. 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 simply means 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 simply means that the horizontal height of the first feature is lower than that of the second feature.

[0036] As Figure 1-8As shown, a pressurized mixed-flow handheld folding fan is provided, including: a fan head 1 for driving to generate an air flow and a handle 2 for holding by hand or placing on a table; wherein, at least a part of the fan head 1 is hinged to the handle 2, and the fan head 1 can rotate around the handle 2 to adjust the air outlet direction; wherein, a driving circuit board 3, a battery 4 and a control button 5 for control are installed in the handle 2; the battery 4 and the control button 5 are electrically connected to the driving circuit board 3; the control button 5 is exposed on the outer peripheral surface of the handle 2; the fan head 1 includes a first housing 6, a second housing 7, a motor 8 and a fan blade 9; the first housing 6 is located at the air inlet end; the first housing 6 includes a first outer ring 10, a motor mounting seat 11 and more than one first pressurizing piece 12; the motor 8 is arranged on the motor mounting seat 11, and the fan blade 9 is arranged at the output end of the motor 8; the first pressurizing pieces 12 are distributed on the inner wall of the first outer ring 10 and extend to connect the outer peripheral edge of the motor mounting seat 11; the inner wall of the first outer ring 10, the first pressurizing pieces 12 and the motor mounting seat 11 form a first speed increasing air duct 13, and the first speed increasing air duct 13 increases through the first pressurizing pieces 12 to cause the radial ventilation area to become smaller, thereby pressurizing and increasing the speed of the air flow; the second housing 7 is located at the air outlet end of the first housing 6; the second housing 7 includes a second outer ring 14, a pressurizing seat 15 and more than one second pressurizing piece 16; the second pressurizing pieces 16 are distributed on the inner wall of the second outer ring 14 and extend to connect the outer peripheral edge of the pressurizing seat 15; the inner wall of the second outer ring 14 radially contracts from the air inlet end to the air outlet end direction to form an outer air guiding surface 17 for pressurizing and increasing the speed of the air flow, and the inner wall of the second outer ring 14, the second pressurizing pieces 16 and the pressurizing seat 15 form a second speed increasing air duct 18, and the second speed increasing air duct 18 increases through the second pressurizing pieces 16 to cause the radial ventilation area to become smaller, thereby pressurizing and increasing the speed of the air flow; wherein, the motor 8 drives the fan blade 9 to rotate to generate negative pressure at the air inlet end to guide the air flow to the first speed increasing air duct 13; the air flow is pressurized by the first pressurizing pieces 12 on the first outer ring 10 and guided to the second speed increasing air duct 18; the air flow is pressurized and blown out in the second speed increasing air duct 18 through the second pressurizing pieces 16; so that the air flow increases the air volume and the air supply distance after increasing the speed through the first speed increasing air duct 13 and the second speed increasing air duct 18.

[0037] In view of the technical problems described in the background art, a pressure - mixed - flow hand - held folding fan is provided, which includes a fan head 1 and a handle 2. The fan head 1 and the handle 2 are independent components. The fan head 1 and the handle 2 are assembled and connected. By hinging the fan head 1 and the handle 2, the rotation of the fan head 1 relative to the handle 2 is adjusted, so as to realize the adjustment of the air outlet direction. Among them, the fan head 1 is mainly used to drive the generation of air flow, and the handle 2 is used for the user to hold or can be placed on a desktop or other places. Usually, a battery 4, a driving circuit board 3 and a control button 5 are installed in the handle 2; the battery 4 is used to provide power for endurance, and the driving circuit board 3 is used to set up a control circuit. One or more driving circuit boards 3 can be set up to control components, such as driving a motor 8, driving a digital display panel 38, etc.; the control button 5 is used to turn on or off or adjust the air volume gear.

[0038] Reference Figure 5 , for the first housing 6, the first housing 6 includes a first outer ring 10, a motor mounting seat 11 and a first pressure - adding piece 12. The motor mounting seat 11, the first outer ring 10 and the first pressure - adding piece 12 can be integrally formed or independent components. The motor mounting seat 11 can be arranged at the air inlet end position or the air outlet end position of the first outer ring 10. As an implementable technical solution, the motor mounting seat 11, the first outer ring 10 and the first pressure - adding piece 12 are integrally formed and the motor mounting seat 11 is arranged at the air outlet end of the first outer ring 10. The first pressure - adding piece 12 can be evenly distributed or unevenly distributed between the first outer ring 10 and the motor mounting seat 11. Preferably, the first pressure - adding piece 12 adopts a circumferentially uniform distribution form. Due to the existence of the first pressure - adding piece 12, the radial ventilation area of the air flow passing through the first outer ring 10 becomes smaller, and the first housing 6 is located at the air inlet end. The air flow can suck in the surrounding air flow, increasing the air volume. At the same time, the air flow is pressurized to increase the air flow speed.

[0039] Reference Figure 6 , the second housing 7 includes a second outer ring 14, a pressurizing seat 15 and a second pressure - adding piece 16. Among them, the second outer ring 14, the pressurizing seat 15 and the second pressure - adding piece 16 can be integrally formed or in the form of independent components. Preferably, the second outer ring 14, the pressurizing seat 15 and the second pressure - adding piece 16 are integrally formed. The second housing 7 can be in an integral form or an independent component form with the first housing 6. The second pressure - adding piece 16 can be evenly distributed or unevenly distributed between the second outer ring 14 and the pressurizing seat 15. Due to the existence of the second pressure - adding piece 16 in the second speed - increasing air duct 18, the radial ventilation area of the air flow passing through the second outer ring 14 becomes smaller, further pressurizing the air flow to increase the air flow speed. At the same time, the second outer ring 14 radially contracts from the air inlet end to the air outlet end to form an outer air - guiding surface 17 to pressurize and speed up the air flow. Under the action of the outer air - guiding surface 17, a constriction structure is formed at the air outlet end position, thereby pressurizing and speeding up the air flow.

[0040] The fan head 1 and the handle 2 are in a hinged form. The fan head 1 can rotate relative to the handle 2 to adjust the air outlet direction, meeting the user's usage requirements. It adopts a double-speed air duct form. When the air flow passes through the first speed-up air duct 13, the first pressure piece 12 provided in the first speed-up air duct 13 causes the radial ventilation area to become smaller to pressurize the air flow. At the same time, the first speed-up air duct 13 is located at the air inlet end, thereby being able to suck in the surrounding air and increase the air volume. When the air flow passes through the second speed-up air duct 18, under the action of the second pressure piece 16 in the second speed-up air duct 18, the air flow is further pressurized in the second stage, thereby increasing the air volume and the air supply distance of the air flow.

[0041] Reference Figure 9 and 10 As shown, the first pressure piece 12 is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure piece 12 of the first speed-up air duct 13 guides the air flow in the forward direction or converges the air flow in the reverse direction to the second speed-up air duct 18. The second pressure piece 16 is distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressure piece 16 converges the air flow in the reverse direction or blows the air flow out in the forward direction, achieving the effect of pressurizing and converging the air flow.

[0042] As a preferred technical solution, in an implementable manner, the first pressure piece 12 is arranged clockwise and the second pressure piece 16 is arranged counterclockwise. Since the air flow is driven by the fan blade 9, the air flow moves centrifugally along the circumferential direction of the fan blade 9. The arrangement direction of the first pressure piece 12 of the first speed-up air duct 13 is opposite to the direction of the air flow movement. The first pressure piece 12 converges the wind moving in all directions and changes the flow direction of the air flow. The air flow passing through the first speed-up air duct 13 is guided to the second speed-up air duct 18. The second pressure piece 16 of the second speed-up air duct 18 is arranged counterclockwise. Since the counterclockwise arrangement of the second pressure piece 16 is the same as the direction of the air flow movement, the second pressure piece 16 exports the converged air flow, and then the air passing through the second speed-up air duct 18 blows out in the front. This avoids the air flow being scattered and causing air volume loss, achieving the effect of converging and pressurizing the air flow.

[0043] In another implementable manner, the first pressure piece 12 is arranged counterclockwise and the second pressure piece 16 is arranged clockwise. Since the air flow is driven by the fan blade 9, the air flow moves centrifugally along the circumferential direction of the fan blade 9. The arrangement direction of the first pressure piece 12 of the first speed-up air duct 13 is the same as the direction of the air flow movement. The first pressure piece 12 guides and pressurizes the wind moving in all directions. Since the clockwise arrangement of the second pressure piece 16 is opposite to the direction of the air flow movement, the second pressure piece 16 can converge the air flow and change the flow direction of the air flow, so that when the air flow blows out, it can present a form of blowing out in the front, avoiding the air flow being scattered and causing air volume loss.

[0044] Reference Figure 5 and Figures 11-13 The motor 8 includes a stator 19 and a rotor 20. The stator 19 is fixed on the motor mounting base 11. The rotor 20 is arranged on the fan blade 9, and the rotor 20 is sleeved on the stator 19. In implementation, the motor 8 can adopt the form of a brushed motor or a brushless motor.

[0045] The motor mounting base 11 is provided with a convex column 21 extending axially and having a hollow interior; the fan blade 9 includes a hub portion 22 and blades 23 uniformly arranged on the outer peripheral surface of the hub portion 22. The hub portion 22 has a receiving portion 24 recessed inward; the stator 19 includes an iron core 25 inserted on the convex column 21 and a coil 26 wound around the iron core 25; the rotor 20 includes a rotating shaft 27 axially arranged in 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 into the convex column 21.

[0046] Preferably, as an implementable technical solution, the motor 8 adopts an outer rotor brushless motor. Structurally, the hub portion 22 of the fan blade 9 is provided with a receiving portion 24, and the fan blade 9 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 position of the receiving portion 24, so as to optimize the structure and save the number of components. At the same time, a hollow convex column 21 is arranged on the motor mounting base 11 to facilitate the insertion of the rotating shaft 27 into the convex column 21 for positioning. At the same time, the iron core 25 and the coil 26 of the stator 19 can be sleeved on the convex column 21 for positioning. The fan blade 9 is driven through the designed outer rotor brushless motor structure, and the structure can be made more compact, saving the number of components, thereby reducing costs.

[0047] Reference Figure 14 Specifically, it includes a housing 29. The housing 29 is provided with a hollow accommodating portion 30 from the air inlet end to the air outlet end. At least a part of the accommodating portion 30 extends to the first housing 6 or the second housing 7; to form a wrapping around the first housing 6 or the first housing 6 and the second housing 7, or to form an accommodation in the first housing 6 or the first housing 6 and the second housing 7.

[0048] In a further technical solution, a housing 29 is added. The housing 29 has a hollow structure to form a receiving portion 30. The housing 29 can be arranged on one side of the first housing 6. In one implementation, the housing 29 can receive the first housing 6 and the second housing 7 through the receiving portion 30; in the second implementation, the housing 29 can receive the first housing 6; in the third implementation, the housing 29 can be received inside the first housing 6 and the second housing 7; in the fourth implementation, the housing 29 can be received inside the first housing 6. Preferably, in this implementation, the fourth method is adopted.

[0049] Refer to Figure 2 As shown, there is a power supply interface 31, and the power supply interface 31 is electrically connected to the drive circuit board 3. The power supply interface 31 is used to connect an external wire to supply power or to charge the battery 4.

[0050] As Figure 3 Shown, the fan head 1 has a protrusion 32, and a rotating portion 33 is provided on the protrusion 32; the handle 2 is arranged in a recess 34 that cooperates with the protrusion 32, and a positioning hole 35 that cooperates with the rotating portion 33 is provided in the recess 34; the rotating portion 33 can rotate and adjust relative to the positioning hole 35.

[0051] The above provides a connection method between the fan head 1 and the handle 2. In the above technical solution, the protrusion 32 of the fan head 1 is placed in the recess 34, and the rotating shaft 27 is placed in the positioning hole 35. When rotating, the rotating shaft 27 rotates relative to the positioning hole 35, so as to realize the rotation of the fan head 1 relative to the handle 2, and further adjust the air outlet direction.

[0052] The housing 29 is provided with an air inlet grille 36 at the air inlet end. The air inlet grille 36 includes connecting bars that are evenly distributed in a circumferential manner. The connecting bars extend radially and are connected to the inner wall of the housing 29 to form a gap for preventing foreign objects from entering.

[0053] As Figure 15 Shown, a face cover 37 is provided on one side of the pressurizing seat 15 close to the air outlet end. There is an installation space between the face cover 37 and the pressurizing seat 15. A digital display panel 38 is provided in the installation space. The digital display panel 38 is used to display and / or control parameters. Among them, the provided digital display panel 38 can be used to display information such as the battery power and the wind speed gear of the battery 4. The digital display panel 38 is arranged at the end face position of the second housing 7, which is convenient for viewing or controlling and is more convenient to use.

[0054] The above does not impose any limitation on the technical scope of the present invention. Any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A pressurized mixed-flow handheld folding fan, characterized in that, Comprising: A fan head for driving the generation of air flow and a handle for being held by hand or placed on a table; wherein, at least a part of the fan head is hinged to the handle, and the fan head can rotate around the handle to adjust the air outlet direction; wherein, a drive circuit board, a battery and a control button for control are installed in the handle; the battery and the control button are electrically connected to the drive circuit board; the control button is exposed on the outer peripheral surface of the handle; The fan head includes a first housing, a second housing, a motor and a fan blade; The first housing is located at the air inlet end; the first housing includes a first outer ring, a motor mounting seat and more than one first pressure piece; the motor is arranged on the motor mounting seat, and the fan blade is arranged at the output end of the motor; the first pressure 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 pressure 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 pressure pieces to become smaller, thereby pressurizing and increasing the speed of the air flow; The second housing is located at the air outlet end of the first housing; the second housing includes a second outer ring, a pressurizing seat and more than one second pressure piece; the second pressure pieces are distributed on the inner wall of the second outer ring and extend to connect the outer periphery of the pressurizing 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 air guiding surface for pressurizing and increasing the speed of the air flow, and the inner wall of the second outer ring, the second pressure 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 pressure 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 guide the air flow to the first speed increasing air duct; the air flow is pressurized by the first pressure pieces on the first outer ring and guided to the second speed increasing air duct; the air flow is pressurized and blown out in the second speed increasing air duct through the second pressure 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.

2. The pressurized mixed-flow hand-held folding fan according to claim 1, wherein: The first pressure pieces are distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure pieces of the first speed increasing air duct guide the air flow in the forward direction or gather the air flow in the reverse direction to the second speed increasing air duct, and the second pressure pieces are distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressure pieces gather the air flow in the reverse direction or blow the air flow in the forward direction, achieving the effect of pressurizing and gathering the air flow.

3. The pressurized mixed-flow hand-held folding fan according to claim 1, wherein: The 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.

4. The pressurized mixed-flow hand-held folding fan according to claim 3, wherein: The motor mounting seat is provided with a convex column extending axially and having a hollow interior; The fan blade includes a hub portion and blades uniformly arranged on the outer circumferential 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 around 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 into the convex column.

5. The pressurized mixed-flow hand-held folding fan according to claim 2 or 4, characterized in that: It includes a housing, and the housing is provided with a hollow accommodating portion from the air inlet end to the air outlet end, and at least a part of the accommodating portion extends to the first housing or the second housing. So as to form a wrap around the first housing or the first housing and the second housing, or so as to form an accommodation in the first housing or the first housing and the second housing.

6. The pressurized mixed-flow hand-held folding fan according to claim 5, characterized in that: A power supply interface, and the power supply interface is electrically connected to the drive circuit board.

7. The pressurized mixed-flow hand-held folding fan according to claim 1, characterized in that: The fan head has a protruding portion, and a rotating portion is provided on the protruding portion; the handle is arranged in a recessed portion cooperating with the protruding portion, and a positioning hole cooperating with the rotating portion is provided in the recessed portion; the rotating portion can be rotationally adjusted relative to the positioning hole.

8. The pressurized mixed-flow hand-held folding fan according to claim 5, characterized in that: The housing is provided with an air inlet grille at the air inlet end, and the air inlet grille includes connecting strips evenly distributed in a circle, and the connecting strips extend radially to be connected to the inner wall of the housing to form a gap for preventing foreign objects from entering.

9. The pressurized mixed-flow hand-held folding fan according to claim 5, characterized in that: A face cover is provided on one side of the pressurizing seat close to the air outlet end, and there is an installation space between the face cover and the pressurizing seat, and a digital display panel is arranged in the installation space, and the digital display panel is used for displaying and / or controlling parameters.

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