Pressurizing mixed flow handheld fan

Abstract

The utility model relates to the technical field of fans, and discloses a pressurizing mixed flow handheld fan which comprises a fan head and a handle. The fan head comprises a first shell, a second shell, a third 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; the third shell comprises a third outer ring, an air guide seat and a third pressurizing sheet; the third outer ring, the third pressurizing sheet and the air guide seat form a third speed-increasing air duct; after airflow passes through the first speed-increasing air duct, the second speed-increasing air duct and the third speed-increasing air duct to be accelerated, the air volume is increased, and the air supply distance is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a pressurized mixed-flow hand-held fan. Background Art

[0002] The hand-held small fan is an electrical appliance used in daily life. It is rechargeable and portable. In hot weather or when going out, the hand-held fan can be used to blow and dissipate heat.

[0003] At present, the hand-held fans adopted drive the fan blades to rotate through an electric motor. When the fan blades rotate, the air flow is inhaled from the air inlet and then blown out from the air outlet to achieve cooling. The direct air outlet method, that is, the straight-in and straight-out method, has the problems of low air pressure and short air supply distance, resulting in the inability to feel the air flow blowing at a slightly longer distance and ineffective cooling.

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

[0005] The technical problem solved by the utility model is to provide a pressurized mixed-flow hand-held fan to solve the problems raised in the above background art 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 fan, comprising: a fan head for driving the generation of air flow and a handle connected to the fan head, 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 third housing, a motor and a fan blade; the first housing, the first housing is located at the air inlet end; the first housing includes a first outer ring, a motor mounting seat and more than one first pressurizing piece; the motor is arranged on the motor mounting seat; 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 peripheral edge of the motor mounting seat; the inner wall of the first outer ring, the first pressurizing pieces and the motor mounting seat form a first speed-increasing air duct, and the first speed-increasing air duct increases the radial ventilation area through the first pressurizing pieces to become smaller, thereby pressurizing and increasing the speed of the air flow; the second housing, the second housing is arranged 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 peripheral edge of the pressurizing seat; the inner wall of the second outer ring, the second pressurizing pieces and the pressurizing seat form a second speed-increasing air duct, and the second speed-increasing air duct increases the radial ventilation area through the second pressurizing pieces to become smaller, thereby pressurizing and increasing the speed of the air flow; the third housing, the third housing is arranged at the air outlet end of the second housing; the third housing includes a third outer ring, a wind guiding seat and more than one third pressurizing piece; the third pressurizing pieces are distributed on the inner wall of the third outer ring and extend to connect the outer peripheral edge of the wind guiding seat; the third outer ring, the third pressurizing pieces and the wind guiding seat form a third speed-increasing air duct, and the third speed-increasing air duct increases the radial ventilation area through the third pressurizing pieces to become smaller, thereby pressurizing and increasing the speed of the air flow to direct the air flow to blow out; wherein, the motor drives the fan blade to rotate to generate negative pressure at the air inlet end to direct the air flow to the first speed-increasing air duct; the air flow is pressurized by the first pressurizing pieces on the first outer ring and directed to the second speed-increasing air duct; the air flow is pressurized by the second pressurizing pieces in the second speed-increasing air duct and blown to the third speed-increasing air duct; the air flow is pressurized and blown out by the third pressurizing pieces in the third speed-increasing air duct, so that the air flow increases the air volume and the air supply distance after passing through the first speed-increasing air duct, the second speed-increasing air duct and the third speed-increasing air duct.

[0007] Furthermore, the first pressure sheet is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure sheet 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 sheet is distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressure sheet 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.

[0008] 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.

[0009] Furthermore, the motor mounting seat is provided with a convex column which extends axially and is hollow inside; the fan blades include a hub portion and blades evenly arranged on the outer circumferential surface of the hub portion, and the hub portion has a receiving portion which is 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 on 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.

[0010] Further, it includes an air inlet hood, 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 or the third shell; to form a package that wraps the first shell or the first shell, the second shell or the first shell, the second shell, the third shell, or to form a package contained in the first shell or the first shell, the second shell or the first shell, the second shell, the third shell.

[0011] Furthermore, the blades of the fan blades are distributed counterclockwise from the air inlet end to the air outlet end.

[0012] Furthermore, it includes a power supply interface for providing electric power, the power supply interface is electrically connected to the driving circuit board, and the power supply interface is exposed outside the handle.

[0013] Furthermore, the air guide seat is provided with a face cover at the air outlet direction, the face cover and the air guide seat form an installation space, a digital display panel is provided in the installation space, and the digital display panel is used to display and / or control parameters.

[0014] Furthermore, it comprises a decorative ring, which is embedded in the circumferential edge of the air outlet end of the third shell, and the decorative ring is provided with a radially enlarged air guide arc surface from the air inlet end to the air outlet end.

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

[0016] 1. This pressurized mixed-flow handheld fan adopts a three-speed air duct form. When the air flow passes through the first-speed air duct, the first pressurizing piece set in the first-speed air duct causes the radial ventilation area to become smaller, thus realizing the pressurization of the air flow. At the same time, the first-speed air duct is located at the air inlet end, whereby it can suck in the surrounding air and increase the air volume. When the air flow passes through the second-speed air duct, the second pressurizing piece set in the second-speed air duct causes the radial ventilation area to become smaller, further performing the second-stage pressurization on the air flow. When the air flow passes through the third-speed air duct, the third pressurizing piece set in the third-speed air duct causes the radial ventilation area to become smaller, further performing the third-stage pressurization on the air flow, thereby realizing the increase of the air volume and the air supply distance of the air flow.

[0017] 2. The first pressurizing pieces in the first-speed air duct are arranged in a clockwise or counterclockwise manner, and the second pressurizing pieces in the second-speed air duct are arranged in a counterclockwise or clockwise manner. Under the combined action of the two, it can realize guiding the air flow first and then gathering the air flow to adjust the direction of the air flow blown out; or gathering the air flow first and then guiding the air flow to adjust the direction of the air flow blown out. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0020] Figure 3 It is an exploded structural diagram of the present utility model.

[0021] Figure 4 It is a cross-sectional structural diagram of the fan head.

[0022] Figure 5 It is a schematic structural diagram of the first housing.

[0023] Figure 6 It is a schematic structural diagram of the first housing.

[0024] Figure 7 It is a schematic structural diagram of the second housing.

[0025] Figure 8 It is a schematic structural diagram of the second housing.

[0026] Figure 9 It is a schematic structural diagram of the third housing.

[0027] Figure 10 It is a schematic structural diagram of the third housing.

[0028] Figure 11 It is a schematic structural diagram of the first housing, the second housing and the third housing.

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

[0030] Figure 13 It is a schematic structural diagram of the rotor and the fan blade.

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

[0032] Figure 15 It is a schematic structural diagram of the air inlet cover.

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

[0034] The following further describes the present utility model in detail 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 a limitation of the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "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 a limitation of 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 indicating 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 meaning of "several" and "multiple" is two or more, unless otherwise specifically and clearly defined. In the present application, unless otherwise clearly specified and limited, 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 limited, 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 merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0036] As Figure 1-11As shown in the figure, a pressurized mixed-flow hand-held fan is provided, including: a fan head 1 for driving to generate air flow and a handle 2 connected to the fan head 1. A drive circuit board 3 for control, a battery 4, and a control button 5 are installed in the handle 2; the battery 4 and the control button 5 are electrically connected to the drive 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 third housing 8, a motor 9, and a fan blade 10; the first housing 6, the first housing 6 is located at the air inlet end; the first housing 6 includes a first outer ring 11, a motor mounting seat 12, and more than one first pressurizing piece 13; the motor 9 is arranged on the motor mounting seat 12; the fan blade 10 is arranged at the output end of the motor 9; the first pressurizing pieces 13 are distributed on the inner wall of the first outer ring 11 and extend to connect the outer peripheral edge of the motor mounting seat 12; the inner wall of the first outer ring 11, the first pressurizing pieces 13, and the motor mounting seat 12 form a first speed-up air duct 14, and the first speed-up air duct 14 increases the radial ventilation area through the first pressurizing pieces 13 to form pressurization and speed increase of the air flow; the second housing 7, the second housing 7 is arranged at the air outlet end of the first housing 6; the second housing 7 includes a second outer ring 15, a pressurizing seat 16, and more than one second pressurizing piece 17; the second pressurizing pieces 17 are distributed on the inner wall of the second outer ring 15 and extend to connect the outer peripheral edge of the pressurizing seat 16; the inner wall of the second outer ring 15, the second pressurizing pieces 17, and the pressurizing seat 16 form a second speed-up air duct 18, and the second speed-up air duct 18 increases the radial ventilation area through the second pressurizing pieces 17 to form pressurization and speed increase of the air flow; the third housing 8, the third housing 8 is arranged at the air outlet end of the second housing 7; the third housing 8 includes a third outer ring 19, a wind guiding seat 20, and more than one third pressurizing piece 21; the third pressurizing pieces 21 are distributed on the inner wall of the third outer ring 19 and extend to connect the outer peripheral edge of the wind guiding seat 20; the third outer ring 19, the third pressurizing pieces 21, and the wind guiding seat 20 form a third speed-up air duct 22, and the third speed-up air duct 22 increases the radial ventilation area through the third pressurizing pieces 21 to form pressurization and speed increase of the air flow to direct the air flow to blow out; wherein, the motor 9 drives the fan blade 10 to rotate to generate negative pressure at the air inlet end to direct the air flow to the first speed-up air duct 14; the air flow is pressurized by the first pressurizing pieces 13 on the first outer ring 11 and guided to the second speed-up air duct 18; the air flow is pressurized by the second pressurizing pieces 17 in the second speed-up air duct 18 and blown to the third speed-up air duct 22; the air flow is pressurized by the third pressurizing pieces 21 in the third speed-up air duct 22 and blown out, so that the air flow increases the air volume and the air supply distance after passing through the first speed-up air duct 14, the second speed-up air duct 18, and the third speed-up air duct 22.

[0037] In view of the technical problems existing in the background art, a pressurized mixed-flow hand-held fan is provided, which includes a fan head 1 and a handle 2. In implementation, the fan head 1 and the handle 2 can be an integral component structure or an independent component structure. Preferably, the fan head 1 and the handle 2 are independent components, and the fan head 1 and the handle 2 are assembled and connected. Among them, the fan head 1 is mainly used to drive the generation of air flow. The handle 2 is for the user to hold, and usually a battery 4, a drive circuit board 3 and a control button 5 are installed in the handle 2; the battery 4 is used to provide power for endurance, the drive circuit board 3 is used to set the control circuit, and the control button 5 is used to turn on or off or adjust the air volume gear.

[0038] For the first housing 6, it includes a first outer ring 11, a motor mounting base 12, and a first pressing piece 13. The motor mounting base 12 and the first outer ring 11 can be integrally formed or be independent components. The motor mounting base 12 can be arranged at the air inlet end position or the air outlet end position of the first outer ring 11. As an implementable technical solution, the motor mounting base 12 and the first outer ring 11 are integrally formed and the motor mounting base 12 is arranged at the air outlet end of the first outer ring 11. The first pressing piece 13 can be evenly distributed or unevenly distributed between the first outer ring 11 and the motor mounting base 12. Preferably, the first pressing piece 13 is in a circumferentially uniform distribution form. Due to the presence of the first pressing piece 13, the radial ventilation area of the air flow passing through the first outer ring 11 becomes smaller, and the first housing 6 is located at the air inlet end. The air flow can suck and gather the surrounding air flows, increasing the air volume; at the same time, it pressurizes the air flow and increases the air flow speed. The second housing 7 includes a second outer ring 15, a pressurizing base 16, and a second pressing piece 17. Among them, the second outer ring 15, the pressurizing base 16, and the second pressing piece 17 can be integrally formed or in the form of independent components. Preferably, the second outer ring 15, the pressurizing base 16, and the second pressing piece 17 are integrally formed. The second housing 7 can be in an integral form with the first housing 6 or in the form of independent components. The second pressing piece 17 can be evenly distributed or unevenly distributed between the second outer ring 15 and the pressurizing base 16. Preferably, the second pressing piece 17 is in a circumferentially uniform distribution form. The presence of the second pressing piece 17 in the second speed-up air duct 18 causes the radial ventilation area of the air flow passing through the second outer ring 15 to become smaller, further pressurizing the air flow and increasing the air flow speed. The third housing 8 includes a third outer ring 19, a wind guiding base 20, and a third pressing piece 21. Among them, the third outer ring 19, the wind guiding base 20, and the third pressing piece 21 can be integrally formed or in the form of independent components. Preferably, the third outer ring 19, the wind guiding base 20, and the third pressing piece 21 are integrally formed. The third housing 8 can be in an integral form with the second housing 7 or the third housing 8 can be in an integral form with the second housing 7 and the first housing 6 or the third housing 8, the second housing 7, and the first housing 6 are in the form of independent components. The third pressing piece 21 can be evenly distributed or unevenly distributed between the third outer ring 19 and the wind guiding base 20. Preferably, the third pressing piece 21 is in a circumferentially uniform distribution form. The presence of the third pressing piece 21 in the third speed-up air duct 22 causes the radial ventilation area of the air flow passing through the third outer ring 19 to become smaller, further pressurizing the air flow and increasing the air flow speed.

[0039] This pressurized mixed-flow hand-held fan adopts a three-speed air duct form. When the air flow passes through the first speed-up air duct 14, the first pressurizing piece 13 arranged in the first speed-up air duct 14 causes the radial ventilation area to become smaller to achieve pressurization of the air flow. At the same time, the first speed-up air duct 14 is located at the air inlet end, whereby the surrounding air can be sucked in to increase the air volume. When the air flow passes through the second speed-up air duct 18, the second pressurizing piece 17 arranged in the second speed-up air duct 18 causes the radial ventilation area to become smaller, further performing the second-stage pressurization on the air flow. When the air flow passes through the third speed-up air duct 22, the third pressurizing piece 21 arranged in the third speed-up air duct 22 causes the radial ventilation area to become smaller, further performing the third-stage pressurization on the air flow, thereby achieving an increase in the air volume and the air supply distance of the air flow.

[0040] Reference Figure 6 and Figure 8 As shown, the first pressurizing piece 13 is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressurizing piece 13 of the first speed-up air duct 14 guides the air flow smoothly or gathers the air flow reversely to the second speed-up air duct 18. The second pressurizing piece 17 is distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressurizing piece 17 gathers the air flow reversely or blows the air flow out smoothly, achieving the effect of pressurizing and gathering the air flow.

[0041] As a preferred technical solution, in an implementable manner, the first pressurizing piece 13 is arranged clockwise and the second pressurizing piece 17 is arranged counterclockwise. Since the air flow moves centrifugally along the circumferential direction of the fan blade 10 driven by the fan blade 10, the setting direction of the first pressurizing piece 13 of the first speed-up air duct 14 is opposite to the direction of the air flow movement. The first pressurizing piece 13 gathers the air flowing in all directions and changes the flow direction of the air flow. The air flow passing through the first speed-up air duct 14 is guided to the second speed-up air duct 18. The second pressurizing piece 17 of the second speed-up air duct 18 is arranged counterclockwise. Since the counterclockwise setting of the second pressurizing piece 17 is the same as the direction of the air flow movement, the second pressurizing piece 17 then discharges the gathered air flow, and thus the air passing through the second speed-up air duct 18 blows out directly. This avoids the scattered blowing of the air flow, causing air volume loss, and achieves the effect of gathering and pressurizing the air flow.

[0042] In another implementable manner, the first pressure piece 13 is arranged in a counterclockwise direction and the second pressure piece 17 is arranged in a clockwise direction. Since the air flow is driven by the fan blade 10, the air flow moves centrifugally in the circumferential direction around the fan blade 10. The arrangement direction of the first pressure piece 13 in the first air speed increasing duct 14 is the same as the direction of the air flow movement. The first pressure piece 13 guides and pressurizes the air moving in all directions. Since the clockwise arrangement of the second pressure piece 17 is opposite to the direction of the air flow movement, the second pressure piece 17 can gather the air flow and change the flow direction of the air flow, so that when the air flow is blown out, it can be blown out in a front-facing form, avoiding the scattered blowing of the air flow and causing air volume loss.

[0043] As Figure 3 , Figure 5 , Figure 13 and Figure 14 shown, the motor 9 includes a stator 23 and a rotor 24. The stator 23 is fixed on the motor mounting seat 12, the rotor 24 is arranged on the fan blade 10, and the rotor 24 is sleeved on the stator 23. In implementation, the motor 9 can adopt the form of a brushed motor or a brushless motor.

[0044] The motor mounting seat 12 is provided with a convex column 25 extending axially and having a hollow interior; the fan blade 10 includes a hub portion 26 and blades 27 uniformly arranged on the outer circumferential surface of the hub portion 26. The hub portion 26 has a receiving portion 28 recessed inward; the stator 23 includes an iron core 29 inserted on the convex column 25 and a coil 30 wound around the iron core 29; the rotor 24 includes a rotating shaft 31 axially arranged in the receiving portion 28 and a magnetic ring 32 attached to the radial inner wall of the receiving portion 28, and the rotating shaft 31 is inserted into the convex column 25.

[0045] Preferably, as an implementable technical solution, the motor 9 adopts an outer rotor brushless motor. In terms of structure, the hub portion 26 of the fan blade 10 is provided with a receiving portion 28, and the fan blade 10 is used as the installation position of the rotor 24. The magnetic ring 32 and the rotating shaft 31 of the rotor 24 are arranged at the position of the receiving portion 28, so as to optimize the structure and save the number of components. At the same time, a hollow convex column 25 is arranged on the motor mounting seat 12 to facilitate the insertion of the rotating shaft 31 into the convex column 25 for positioning. At the same time, the iron core 29 and the coil 30 of the stator 23 can be sleeved on the convex column 25 for positioning. The driving of the fan blade 10 is realized through the designed outer rotor brushless motor structure, and the structure can be made more compact and the number of components can be saved, thereby reducing the cost.

[0046] Referring to Figure 3 and Figure 15As shown in the figure, the utility model includes an air inlet hood 33. The air inlet hood 33 is provided with a hollow accommodating part along the air inlet end to the air outlet end, and at least a part of the accommodating part extends to the first housing 6 or the second housing 7 or the third housing 8; so as to form a wrap around the first housing 6 or the first housing 6, the second housing 7 or the first housing 6, the second housing 7, the third housing 8, or so as to form an accommodation within the first housing 6 or the first housing 6, the second housing 7 or the first housing 6, the second housing 7, the third housing 8.

[0047] In a further technical solution, an air inlet hood 33 is added. The air inlet hood 33 is of a hollow structure to form an accommodating part. The air inlet hood 33 can be arranged on one side of the first housing 6. In the first implementation, the air inlet hood 33 can accommodate the first housing 6, the second housing 7, and the third housing 8 through the accommodating part; in the second implementation, the air inlet hood 33 can accommodate the first housing 6 and the second housing 7 through the accommodating part; in the third implementation, the air inlet hood 33 can accommodate the first housing 6; in the fourth implementation, the accommodating part of the air inlet hood 33 can be accommodated within the first housing 6, the second housing 7, and the third housing 8; in the fifth implementation, the accommodating part of the air inlet hood 33 can be accommodated within the first housing 6 and the second housing 7; in the sixth implementation, the accommodating part of the air inlet hood 33 can be accommodated within the first housing 6. Preferably, the sixth implementation mode is adopted in the present utility model.

[0048] Preferably, the blades 27 of the fan blade 10 are distributed counterclockwise from the air inlet end to the air outlet end. When the motor 9 rotates, it drives the fan blade 10 to rotate counterclockwise, so that the air flow direction entering the first speed increasing air duct 14 is counterclockwise.

[0049] As Figure 3 As shown in the figure, the utility model includes a power supply interface 34 for providing power. The power supply interface 34 is electrically connected to the drive circuit board 3, and the power supply interface 34 is exposed outside the handle 2. The power supply interface 34 is used to connect a wire to supply power to the pressurized mixed-flow hand-held fan or to charge the battery 4.

[0050] A face cover 35 is provided at the air outlet direction position of the air guide seat 20. The face cover 35 and the air guide seat 20 form an installation space, and a digital display panel 36 is arranged in the installation space. The digital display panel 36 is used to display and / or control parameters.

[0051] The provided digital display panel 36 can display information such as the power of the battery 4 and the air volume gear. The digital display panel 36 is electrically connected to the drive circuit board 3.

[0052] The utility model further includes a decorative ring 37, which is fitted on the circumferential edge of the air outlet end of the third housing 8. The decorative ring 37 is provided with a wind guiding arc surface 38 that increases radially from the air inlet end to the air outlet end. The provided decorative ring 37 plays a decorative role on the one hand, and on the other hand, uses the designed wind guiding arc surface 38 to guide the airflow after the air outlet and control the airflow direction.

[0053] The above does not impose any limitation on the technical scope of the present utility model. Any modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A pressurized mixed-flow hand-held fan, characterized in that, Comprising: A fan head for driving the generation of air flow and a handle connected to the fan head. A drive circuit board for control, a battery, and control buttons are installed in the handle; the battery and the control buttons are electrically connected to the drive circuit board; the control buttons are exposed on the outer peripheral surface of the handle; The fan head includes a first housing, a second housing, a third housing, a motor, and a fan blade; The first housing, the first housing is located at the air inlet end; the first housing includes a first outer ring, a motor mounting seat, and more than one first pressure increasing piece; the motor is arranged on the motor mounting seat; the fan blade is arranged on the output end of the motor; the first pressure increasing pieces 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 increasing pieces, and the motor mounting seat form a first speed increasing air duct, and the first speed increasing air duct increases through the first pressure increasing pieces, resulting in a smaller radial ventilation area to form pressure increase and speed increase for the air flow; The second housing, the second housing is arranged at the air outlet end of the first housing; the second housing includes a second outer ring, a pressure increasing seat, and more than one second pressure increasing piece; the second pressure increasing pieces are distributed on the inner wall of the second outer ring and extend to connect the outer peripheral edge of the pressure increasing seat; the inner wall of the second outer ring, the second pressure increasing pieces, and the pressure increasing seat form a second speed increasing air duct, and the second speed increasing air duct increases through the second pressure increasing pieces, resulting in a smaller radial ventilation area to form pressure increase and speed increase for the air flow; The third housing, the third housing is arranged at the air outlet end of the second housing; the third housing includes a third outer ring, a wind guiding seat, and more than one third pressure increasing piece; the third pressure increasing pieces are distributed on the inner wall of the third outer ring and extend to connect the outer peripheral edge of the wind guiding seat; the third outer ring, the third pressure increasing pieces, and the wind guiding seat form a third speed increasing air duct, and the third speed increasing air duct increases through the third pressure increasing pieces, resulting in a smaller radial ventilation area to form pressure increase and speed increase for the air flow to direct the air flow to blow out; Wherein, the motor drives the fan blade to rotate to generate negative pressure at the air inlet end to direct the air flow to the first speed increasing air duct; the air flow is pressurized and guided to the second speed increasing air duct through the first pressure increasing pieces on the first outer ring; the air flow is pressurized and blown to the third speed increasing air duct through the second pressure increasing pieces in the second speed increasing air duct; the air flow is pressurized and blown out through the third pressure increasing pieces in the third speed increasing air duct, so that the air flow increases in air volume and air supply distance after passing through the first speed increasing air duct, the second speed increasing air duct, and the third speed increasing air duct.

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

3. The pressurized mixed-flow hand-held fan according to claim 1, wherein: The motor includes a stator and a rotor. The stator is fixed on the motor mounting base. The rotor is arranged on the fan blade, and the rotor is sleeved on the stator.

4. The pressurized mixed-flow hand-held fan according to claim 3, wherein: The motor mounting base 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 peripheral surface of the hub portion. 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. The rotating shaft is inserted into the convex column.

5. The pressurized mixed-flow hand-held fan according to claim 1, wherein: It includes an air inlet cover. The air inlet cover 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 or the third housing; To form a wrap around the first housing or the first housing, the second housing or the first housing, the second housing, the third housing, or to form an accommodation in the first housing or the first housing, the second housing or the first housing, the second housing, the third housing.

6. The pressurized mixed-flow hand-held fan according to any one of claims 1 to 5, wherein: The blades of the fan blade are distributed counterclockwise from the air inlet end to the air outlet end.

7. The pressurized mixed-flow hand-held fan according to claim 6, wherein: It includes a power supply interface for providing power. The power supply interface is electrically connected to the drive circuit board, and the power supply interface is exposed outside the handle.

8. The pressurized mixed-flow hand-held fan according to claim 1, wherein: The air guide seat is provided with a face cover at the position in the air outlet direction. The face cover and the air guide seat form an installation space, and a digital display panel is arranged in the installation space. The digital display panel is used for displaying and / or controlling parameters.

9. The pressurized mixed-flow hand-held fan according to claim 1, wherein: It includes a decorative ring. The decorative ring is fitted on the circumferential edge of the air outlet end of the third housing. The decorative ring is provided with a wind guiding arc surface that increases radially from the air inlet end to the air outlet end.

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