Rotatable and foldable internally and externally inclined type accelerated airflow mixed flow fan

Abstract

The utility model relates to the technical field of fans, and discloses a rotatable and foldable internally and externally inclined accelerated airflow mixed flow fan which comprises a fan head and a base, and the base comprises a base and a rotating box; the fan head comprises a first shell and a second shell; the first shell comprises a first outer ring, a motor mounting seat and a first pressurizing sheet; a motor is arranged on the motor mounting seat, and fan blades are arranged at the output end of the 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; an outer air guide surface is formed on the inner wall of the second outer ring to pressurize and accelerate airflow; an inner air guide surface is formed on the outer wall of the pressurizing seat to pressurize and accelerate airflow; the inner wall of the second outer ring, the second pressurizing sheet and the pressurizing seat form a second accelerating air duct; after airflow is accelerated through the first acceleration air duct and the second acceleration air duct, the air volume and the air supply distance are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and particularly relates to a rotatable and foldable internal and external inclined type accelerated air flow mixed flow fan. Background Art

[0002] The desktop fan is an essential desktop item for many people. Being rechargeable and portable is the greatest advantage of the desktop fan. For users at their desks, they can use the desktop fan to blow and dissipate heat in hot weather.

[0003] The existing desktop fans on the market mainly consist of an air outlet cover, an air inlet cover, a motor and a fan blade. When driving, the fan blade is directly driven by the motor to rotate and blow air, which has the technical problems of low air pressure and short air supply distance. At the same time, the desktop fan lacks the function of shaking its head, and the air outlet direction is fixed.

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

[0005] The technical problem solved by the utility model is to provide a rotatable and foldable internal and external inclined type accelerated air flow mixed flow fan to solve the problems mentioned in the above background art in view of the defects existing in the above prior art.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A rotatable and foldable internal and external inclined accelerated air flow mixing fan, comprising: a base and a fan head for driving the generation of air flow; the base includes a base and a rotating box movably sleeved on the base; the base is provided with a rotating tooth; the rotating box is provided with a rotating motor, and the output end of the rotating motor is in meshing transmission with the rotating tooth; wherein, the rotating motor drives the rotating box to rotate relative to the base; at least a part of the fan head is hinged to the rotating box, and the fan head can be turned over and opened or closed relative to the base; the fan head includes a first housing and a second 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; a motor is provided on the motor mounting seat, and a fan blade is provided on 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 through the first pressurizing pieces, resulting in a smaller radial ventilation area, so as to pressurize and increase 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 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 increase the speed of the air flow; the outer wall of the pressurizing seat radially increases from the air inlet end to the air outlet end to form an inner air guiding surface to pressurize and increase the speed of 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 through the second pressurizing pieces, resulting in a smaller radial ventilation area, so as to pressurize and increase the speed of the air flow; wherein, the motor drives the fan blade to rotate to generate negative pressure at the air inlet end to guide 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 pressurizing pieces on the first outer ring; the air flow is pressurized and blown out in the second speed increasing air duct through the second pressurizing pieces; so that the air flow increases the air volume and the air supply distance after passing through the first speed increasing air duct and the second speed increasing air duct 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 a forward direction or gather the air flow reversely 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 reversely or blow the air flow out in a 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 base, the rotor is arranged on the fan blade, and the rotor is sleeved on the stator.

[0009] Further, 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 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 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.

[0010] Further, it includes a drive circuit board; the drive circuit board is electrically connected to the motor to drive the motor to drive the fan blade to rotate, and blow out the air flow after being accelerated successively through the first acceleration air duct and the second acceleration air duct.

[0011] Further, it includes a housing. 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 of the first housing or the first housing and the second housing, or to form an accommodation in the first housing or the first housing and the second housing; 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. The connecting strips extend radially and are connected to the inner wall of the housing to form a gap for preventing foreign objects from entering.

[0012] Further, it includes a power supply interface, and the power supply interface is electrically connected to the drive circuit board.

[0013] Further, the base includes a lamp board, and the lamp board is arranged on the inner wall of the rotating box.

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

[0015] Further, it includes a battery, and the battery is used for providing power.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The fan structure mainly consists of a base and a fan head. By designing a rotating motor and rotating gears on the base to cooperate, the fan head is driven to shake its head and blow air, resulting in a wider blowing range and a variable air outlet direction. It adopts a double-speed air duct form. When the air flow passes through the first-speed air duct, the first pressure plate set in the first-speed air duct causes the radial ventilation area to become smaller, thus pressurizing the air flow. At the same time, the first-speed air duct is located at the air inlet end, enabling it to suck in the surrounding air and increase the air volume. When the air flow passes through the second-speed air duct, under the action of the second pressure plate in the second-speed air duct, the air flow is further pressurized in the second stage. At the position of the second-speed air duct, 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 speed up the air flow, and the outer circumference of the pressure increasing seat radially increases from the air inlet end to the air outlet end to form an inner air guiding surface to pressurize and speed up the air flow. By using the structure of the constriction formed by the second outer ring and the pressure increasing seat from the air inlet end to the air outlet end, the air volume and the air supply distance of the air flow are increased.

[0018] 2. The first pressure plates in the first-speed air duct are arranged clockwise or counterclockwise, and the second pressure plates in the second-speed air duct are arranged counterclockwise or clockwise. Under the combined action of the two, it is possible to first guide the air flow and then gather the air flow to adjust the direction of the air flow blown out; or first gather the air flow and then guide the air flow to adjust the direction of the air flow blown out. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is a schematic structural view of the present utility model from another angle.

[0021] Figure 3 It is a schematic structural view of the present utility model in the open state.

[0022] Figure 4 is Figure 3 Another schematic structural view of...

[0023] Figure 5 It is an exploded schematic structural view of the base.

[0024] Figure 6 It is an exploded schematic structural view of the fan head.

[0025] Figure 7 It is a schematic structural view of the first housing.

[0026] Figure 8 It is a schematic structural view of the second housing.

[0027] Figure 9 It is a schematic cross-sectional view of the fan head.

[0028] Figure 10Yes Figure 9 Schematic diagram of the partial enlarged structure

[0029] Figure 11 Schematic diagram of the structures of the first housing and the second housing

[0030] Figure 12 Schematic diagram of the structure of the fan blade

[0031] Figure 13 Schematic diagram of the structures of the rotor and the fan blade

[0032] Figure 14 Schematic diagram of the structure of the stator

[0033] Figure 15 Schematic diagram of the structure of the outer casing

[0034] Reference signs: 1, fan head; 2, base; 3, pedestal; 4, rotating box; 5, rotating gear; 6, rotating motor; 7, first housing; 8, second housing; 9, first outer ring; 10, motor mounting seat; 11, first pressing piece; 12, motor; 13, fan blade; 14, first speed increasing air duct; 15, second outer ring; 16, boosting seat; 17, second pressing piece; 18, outer air guiding surface; 19, inner air guiding surface; 20, second speed increasing air duct; 21, stator; 22, rotor; 23, convex column; 24, hub portion; 25, blade; 26, receiving portion; 27, iron core; 28, coil; 29, rotating shaft; 30, magnetic ring; 31, drive circuit board; 32, outer casing; 33, accommodating portion; 34, air inlet grille; 35, power supply interface; 36, lamp board; 37, face cover; 38, digital display panel; 39, battery Detailed implementation manners

[0035] The present utility model will be further described in detail below with reference to the accompanying drawings

[0036] 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 quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "several" and "multiple" is two or more, unless otherwise specifically and clearly defined. In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application may 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 first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0037] As Figure 1-10As shown in the figure, a rotatable and foldable internal and external inclined accelerated air flow mixing fan is provided, including: a base 2 and a fan head 1 for driving the generation of air flow; the base 2 includes a base 3 and a rotating box 4 movably sleeved on the base 3; a rotating tooth 5 is provided on the base 3; a rotating motor 6 is provided on the rotating box 4, and the output end of the rotating motor 6 is meshed and driven with the rotating tooth 5; wherein, the rotating motor 6 drives the rotating box to rotate relative to the base 3; at least a part of the fan head 1 is hinged to the rotating box 4, and the fan head 1 can be turned over and opened or closed with respect to the base 2; the fan head 1 includes a first housing 7 and a second housing 8; the first housing 7 is located at the air inlet end; the first housing 7 includes a first outer ring 9, a motor mounting seat 10 and more than one first pressure increasing piece 11; a motor 12 is provided on the motor mounting seat 10, and a fan blade 13 is provided on the output end of the motor 12; the first pressure increasing pieces 11 are distributed on the inner wall of the first outer ring 9 and extend to connect the outer peripheral edge of the motor mounting seat 10; a first speed increasing air duct 14 is formed by the inner wall of the first outer ring 9, the first pressure increasing pieces 11 and the motor mounting seat 10, and the first speed increasing air duct 14 increases through the first pressure increasing pieces 11 to cause the radial ventilation area to become smaller to form air flow pressurization and speed increase; the second housing 8 is located at the air outlet end of the first housing 7; the second housing 8 includes a second outer ring 15, a pressurization seat 16 and more than one second pressure increasing piece 17; the second pressure increasing pieces 17 are distributed on the inner wall of the second outer ring 15 and extend to connect to the outer peripheral edge of the pressurization seat 16; the inner wall of the second outer ring 15 radially contracts from the air inlet end to the air outlet end to form an outer air guiding surface 18 to pressurize and speed up the air flow; the outer wall of the pressurization seat 16 radially increases from the air inlet end to the air outlet end to form an inner air guiding surface 19 to pressurize and speed up the air flow; a second speed increasing air duct 20 is formed by the inner wall of the second outer ring 15, the second pressure increasing pieces 17 and the pressurization seat 16, and the second speed increasing air duct 20 increases through the second pressure increasing pieces 17 to cause the radial ventilation area to become smaller to form air flow pressurization and speed increase; wherein, the motor 12 drives the fan blade 13 to rotate to generate negative pressure at the air inlet end to guide the air flow to the first speed increasing air duct 14; the air flow is pressurized and guided to the second speed increasing air duct 20 through the first pressure increasing pieces 11 on the first outer ring 9; the air flow is pressurized and blown out through the second pressure increasing pieces 17 in the second speed increasing air duct 20; so that the air flow increases the air volume and the air supply distance after passing through the first speed increasing air duct 14 and the second speed increasing air duct 20.

[0038] In view of the technical problems described in the background art, a desktop pressurized mixed-flow fan is provided, which includes a fan head 1 and a base 2. Among them, the fan head 1 and the base 2 are independent components. The fan head 1 is hinged to the base 2 through a rotating member. When the fan head 1 is folded, the fan head 1 can be stacked on the base 2, which is convenient for storage and arrangement. When in use, the fan head 1 is unfolded relative to the base 2, and the base 2 supports the fan head 1 to blow air to the user.

[0039] Reference Figure 5 , since most of the existing desktop fans on the market blow air in a fixed direction, the blowing range is small. In this regard, the base 2 adopted in the present utility model includes a base 3 and a rotating box 4. The rotating box 4 is sleeved on the base 3, and the rotating box 4 can rotate relative to the base 3. A rotating gear 5 is arranged in the base 3, and the rotating gear 5 can be correspondingly set according to the required rotation range. By fixing a rotating motor 6 on the rotating box 4, the output end of the rotating motor 6 is meshed with the rotating gear 5. When in use, driven by the rotating motor 6, the output end of the rotating motor 6 rotates on the rotating gear 5, thereby driving the rotating box 4 to rotate relative to the base 3. Since the fan head 1 is connected to the rotating box 4, the fan head 1 is driven to shake its head and rotate.

[0040] Reference Figure 7 , for the first housing 7, the first housing 7 includes a first outer ring 9, a motor mounting seat 10, and a first pressurizing piece 11. The motor mounting seat 10, the first outer ring 9, and the first pressurizing piece 11 can be integrally formed or independent components. The motor mounting seat 10 can be arranged at the air inlet end or the air outlet end of the first outer ring 9. As an implementable technical solution, the motor mounting seat 10, the first outer ring 9, and the first pressurizing piece 11 are integrally formed and the motor mounting seat 10 is arranged at the air outlet end of the first outer ring 9. The first pressurizing piece 11 can be evenly distributed or unevenly distributed between the first outer ring 9 and the motor mounting seat 10. Preferably, the first pressurizing piece 11 is in a circumferentially uniform distribution form. Due to the existence of the first pressurizing piece 11, the radial ventilation area of the airflow passing through the first outer ring 9 becomes smaller, and the first housing 7 is located at the air inlet end. The airflow can suck and gather the surrounding airflows, increasing the air volume. At the same time, the airflow is pressurized to increase the airflow speed.

[0041] Reference Figure 8, the second housing 8 includes a second outer ring 15, a pressurizing seat 16, and a second pressure plate 17. Among them, the second outer ring 15, the pressurizing seat 16, and the second pressure plate 17 can be integrally formed or in the form of independent components. Preferably, the second outer ring 15, the pressurizing seat 16, and the second pressure plate 17 are integrally formed. The second housing 8 can be in an integral form or in the form of independent components with the first housing 7. The second pressure plate 17 can be evenly distributed or unevenly distributed between the second outer ring 15 and the pressurizing seat 16. Preferably, the second pressure plate 17 is circumferentially evenly distributed. On the inner wall of the second outer ring 15, an outer air guiding surface 18 is radially contracted in the direction from the air inlet end to the air outlet end. At the same time, in combination with the outer wall of the pressurizing seat 16, an inner air guiding surface 19 is radially increased in the direction from the air inlet end to the air outlet end. The second air accelerating duct 20 forms a constricted shape in the direction from the air inlet end to the air outlet end, realizing the pressurization and acceleration of the air flow. The presence of the second pressure plate 17 in the second air accelerating duct 20 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.

[0042] During the use process, the motor 12 drives the fan blade 13 to rotate. Adopting the double air accelerating duct form, when the air flow passes through the first air accelerating duct 14, the first pressure plate 11 provided in the first air accelerating duct 14 causes the radial ventilation area to become smaller to realize the pressurization of the air flow. At the same time, the first air accelerating duct 14 is located at the air inlet end, whereby the surrounding air can be sucked and gathered, increasing the air volume. When the air flow passes through the second air accelerating duct 20, under the action of the second pressure plate 17 in the second air accelerating duct 20, the air flow is further secondarily pressurized. Then, in combination with the outer wall of the second outer ring 15 of the second air accelerating duct 20, an outer air guiding surface 18 is radially contracted in the direction from the air inlet end to the air outlet end, and the outer wall of the pressurizing seat 16 is radially increased in the direction from the air inlet end to the air outlet end to form an inner air guiding surface 19. Due to the interaction between the outer air guiding surface 18 and the inner air guiding surface 19, the radial ventilation area at the air inlet end of the second air accelerating duct 20 is larger than that at the air outlet end, realizing the increase of the air volume and the air supply distance of the air flow.

[0043] Reference Figure 7 , Figure 8 and Figure 11 , the first pressure plate 11 is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure plate 11 of the first air accelerating duct 14 guides the air flow in the forward direction or gathers the air flow reversely to the second air accelerating duct 20. The second pressure plate 17 is distributed counterclockwise or clockwise from the air inlet end to the air outlet end, so that the second pressure plate 17 gathers the air flow reversely or blows the air flow out in the forward direction, achieving the effect of pressurizing and gathering the air flow.

[0044] In a preferred technical solution, in an implementable manner, the first pressure piece 11 is arranged clockwise and the second pressure piece 17 is arranged counterclockwise. Since the air flow is driven by the fan blade 13, the air flow moves centrifugally in the circumferential direction around the fan blade 13. The arrangement direction of the first pressure piece 11 in the first speed increasing air duct 14 is opposite to the direction of the air flow movement. The first pressure piece 11 gathers the air moving in all directions to change the flow direction of the air flow. The air flow passing through the first speed increasing air duct 14 is guided to the second speed increasing air duct 20. The second pressure piece 17 in the second speed increasing air duct 20 is arranged counterclockwise. Since the counterclockwise arrangement of the second pressure piece 17 is the same as the direction of the air flow movement, the second pressure piece 17 guides out the air flow after air gathering. Furthermore, the air passing through the second speed increasing air duct 20 blows out in a frontal manner. This avoids the air flow being dispersed and blown out, causing air volume loss, and achieves the effect of air gathering and pressure increasing.

[0045] In another implementable manner, the first pressure piece 11 is arranged counterclockwise and the second pressure piece 17 is arranged clockwise. Since the air flow is driven by the fan blade 13, the air flow moves centrifugally in the circumferential direction around the fan blade 13. The arrangement direction of the first pressure piece 11 in the first speed increasing air duct 14 is the same as the direction of the air flow movement. The first pressure piece 11 guides and increases the pressure of 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 to change the flow direction of the air flow, so that when the air flow blows out, it can present a frontal blowing form, avoiding the air flow being dispersed and blown out, resulting in air volume loss.

[0046] Reference Figure 6 、 Figure 7 、 Figure 12 、 Figure 13 and Figure 14 As shown in, the motor 12 includes a stator 21 and a rotor 22. The stator 21 is fixed on the motor mounting seat 10. The rotor 22 is arranged on the fan blade 13, and the rotor 22 is sleeved on the stator 21. In implementation, the motor 12 can adopt the form of a brushed motor or a brushless motor.

[0047] The motor mounting seat 10 is provided with a convex column 23 extending axially and having a hollow interior. The fan blade 13 includes a hub portion 24 and blades 25 uniformly arranged on the outer peripheral surface of the hub portion 24. The hub portion 24 has a receiving portion 26 recessed inward. The stator 21 includes an iron core 27 inserted on the convex column 23 and a coil 28 wound around the iron core 27. The rotor 22 includes a rotating shaft 29 axially arranged in the receiving portion 26 and a magnetic ring 30 attached to the radial inner wall of the receiving portion 26. The rotating shaft 29 is inserted into the convex column 23.

[0048] Preferably, as an implementable technical solution, the motor 12 adopts an external rotor brushless motor. Structurally, a receiving portion 26 is provided in the hub portion 24 of the fan blade 13, and the fan blade 13 is used as the installation position of the rotor 22. The magnetic ring 30 and the rotating shaft 29 of the rotor 22 are arranged at the position of the receiving portion 26. Thus, the structure can be optimized and the number of components can be saved. At the same time, a hollow convex column 23 is provided on the motor mounting seat 10 to facilitate the insertion of the rotating shaft 29 into the convex column 23 for positioning. At the same time, the iron core 27 and the coil 28 of the stator 21 can be sleeved on the convex column 23 for positioning. The designed external rotor brushless motor structure is used to drive the fan blade 13, making the structure more compact and saving the number of components, thereby reducing costs.

[0049] As Figure 2 and Figure 6 shown, the present utility model includes a drive circuit board 31; the drive circuit board 31 is electrically connected to the motor 12 to drive the motor 12 to drive the fan blade 13 to rotate, and the air flow is blown out after being accelerated successively through the first acceleration air duct 14 and the second acceleration air duct 20.

[0050] In a specific implementation, more than one drive circuit board 31 can be installed. When using one drive circuit board 31, the drive circuit board 31 can be used to control functions such as the rotation of the motor 12, the rotation of the rotating motor 6, the turning on or off of the lamp board 36, and the turning on or off of the digital display panel 38; or multiple drive circuit boards 31 can be used. The drive circuit boards 31 are used to respectively control functions such as the rotation of the motor 12, the rotation of the rotating motor 6, the turning on or off of the lamp board 36, and the turning on or off of the digital display panel 38. In this regard, there is no limitation, and it can be selected according to the specific implementation situation.

[0051] Referring to Figure 6 and Figure 15 shown, the present utility model includes a housing 32. The housing 32 is provided with a hollow accommodating portion 33 along the air inlet end to the air outlet end, and at least a part of the accommodating portion 33 extends to the first housing 7 or the second housing 8; to form a wrapping of the first housing 7 or the first housing 7 and the second housing 8, or to form an accommodation in the first housing 7 or the first housing 7 and the second housing 8; the housing 32 is provided with an air inlet grille 34 at the air inlet end. The air inlet grille 34 includes connecting bars evenly distributed in a circumferential manner, and the connecting bars extend radially to connect to the inner wall of the housing 32 to form a gap for preventing foreign objects from entering.

[0052] In a further technical solution, a housing 32 is added. The housing 32 has a hollow structure to form a receiving portion 33. The housing 32 can be arranged on one side of the first housing 7. In one implementation, the housing 32 can receive the first housing 7 and the second housing 8 through the receiving portion 33; in the second implementation, the housing 32 can receive the first housing 7; in the third implementation, the housing 32 can be received in the first housing 7 and the second housing 8; in the fourth implementation, the housing 32 can be received in the first housing 7. Preferably, in this implementation, the fourth method is adopted.

[0053] The power supply interface 35 is electrically connected to the drive circuit board 31; the power supply interface 35 is used to connect an external wire to supply power.

[0054] Further, the base 2 includes a lamp board 36, and the lamp board 36 is arranged on the inner wall of the rotating box 4. The arranged lamp board 36 is used to provide a lighting function. The lamp board 36 is arranged on the surface of the rotating box 4 in contact with the fan head 1, and the lamp board 36 is driven to be turned on or off via the drive circuit board 31.

[0055] A face cover 37 is provided on one side of the booster seat 16 close to the air outlet end. There is an installation space between the face cover 37 and the booster seat 16. A digital display panel 38 is arranged in the installation space, and the digital display panel 38 is used to display and / or control parameters. Among them, the arranged digital display panel 38 can be used to display the power of the battery 39, the wind speed gear, and functions such as starting the fan operation. The digital display panel 38 is arranged at the end face position of the second housing 8, which is convenient for adjustment and control and is more convenient to use.

[0056] Specifically, it includes a battery 39, and the battery 39 is used to provide power. The arranged battery 39 is one or more pieces. The battery 39 can be adopted in an internal or external manner. Preferably, the battery 39 is adopted in an internal manner, and the battery 39 is arranged in the base 2.

[0057] 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 rotatable and foldable internal and external inclined accelerated air flow mixing fan, characterized in that, Comprising: A base and a fan head for driving the generation of air flow; The base includes a base and a rotating box movably sleeved on the base; A rotating tooth is provided on the base; a rotating motor is provided on the rotating box, and the output end of the rotating motor is in meshing transmission with the rotating tooth; wherein, the rotating motor drives the rotating box to rotate relative to the base; at least a part of the fan head is hinged to the rotating box, and the fan head can be turned over and opened or closed relative to the base; The fan head includes a first housing and a second 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; a motor is provided on the motor mounting seat, and a fan blade is provided on 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 through the first pressurizing pieces, resulting in a smaller radial ventilation area to pressurize and increase 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 pressurizing piece; the second pressurizing pieces are distributed on the inner wall of the second outer ring and extend to connect to the outer periphery of the pressurizing seat; the inner wall of the second outer ring radially contracts from the air inlet end to the air outlet end to form an outer air guiding surface to pressurize and increase the speed of the air flow; the outer wall of the pressurizing seat radially increases from the air inlet end to the air outlet end to form an inner air guiding surface to pressurize and increase the speed of 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 through the second pressurizing pieces, resulting in a smaller radial ventilation area to pressurize and increase the speed of the air flow; Wherein, the motor drives the fan blade to rotate to generate a 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 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 pressurizing pieces; so that the air flow increases in volume and the air supply distance after passing through the first speed increasing air duct and the second speed increasing air duct.

2. The rotatable and foldable internal and external inclined type accelerated air flow mixing fan according to claim 1, wherein: 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.

3. The rotatable and foldable internal and external inclined type accelerated air flow mixing 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 rotatable and foldable inner and outer inclined accelerated airflow mixed-flow fan according to claim 3, wherein: 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 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 rotatable and foldable inner and outer inclined accelerated airflow mixed-flow fan according to claim 2 or 4, wherein: It includes a drive circuit board; the drive circuit board is electrically connected to the motor to drive the motor to drive the fan blade to rotate, and the airflow is blown out after being accelerated through the first acceleration air duct and the second acceleration air duct in sequence.

6. The rotatable and foldable inner and outer inclined accelerated airflow mixed-flow fan according to claim 5, wherein: 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 wrap around the first housing or the first housing and the second housing, or to form an accommodation in the first housing or the first housing and the second housing; 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 connect to the inner wall of the housing to form a gap for preventing foreign objects from entering.

7. The rotatable and foldable inner and outer inclined accelerated airflow mixed-flow fan according to claim 5, wherein: It includes a power supply interface, and the power supply interface is electrically connected to the drive circuit board.

8. The rotatable and foldable inner and outer inclined accelerated airflow mixed-flow fan according to claim 5, wherein: The base includes a lamp board, and the lamp board is arranged on the inner wall of the rotating box.

9. The rotatable and foldable inner and outer inclined accelerated airflow mixed-flow fan according to claim 5, wherein: 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.

10. The rotatable and foldable inner and outer inclined accelerated air flow mixing fan according to claim 5, wherein: It includes a battery, and the battery is used for providing power.

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