Staged acceleration and cooling airflow generator

Abstract

The utility model relates to the technical field of fans, and discloses a staged accelerating and cooling airflow generator which comprises a first shell, a second shell, a refrigerating device, a motor and fan blades. The first shell comprises a motor mounting seat, a first pressurizing sheet and a first outer ring; 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 an air guide seat, a second pressurizing sheet and a second outer ring; the second outer ring, the second pressurizing sheet and the air guide seat form a second speed-increasing air duct; the refrigeration device is arranged on the second shell and used for driving refrigeration to reduce the airflow temperature of the air outlet end. Air flow is guided to the first speed-increasing air duct and the second speed-increasing air duct to increase the air volume and the air supply distance after being pressurized and accelerated. And the airflow is blown out after being refrigerated and cooled by the refrigerating device.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a stage speed increasing and cooling air flow generator. Background Art

[0002] Handheld fans are popular among the public because of their small size and portability. They can be used outdoors to blow and cool down in hot weather.

[0003] However, due to the generally low air pressure of existing handheld fans, the air supply distance is short. When the user holds the fan, when the distance is far, the user cannot feel the blowing and cooling. At the same time, the temperature of the blown air is relatively high and cannot quickly cool down.

[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 stage speed increasing and cooling air flow generator 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 problem, the technical solution adopted by the utility model is as follows: A stage speed increasing and cooling air flow generator, comprising: a first housing, a second housing, a refrigeration device, a motor and a fan blade; the first housing is located at the air inlet end; the first housing includes a motor mounting seat, more than one first pressurizing piece and a first outer ring; 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 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 form air flow pressurization and speed increase; a second housing, the second housing is arranged at the air outlet end of the first housing; the second housing includes a wind guiding seat, more than one second pressurizing piece and a second outer ring; the second pressurizing pieces are distributed on the inner wall of the second outer ring and extend to connect the outer periphery of the wind guiding seat; the second outer ring, the second pressurizing pieces and the wind guiding 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 form air flow pressurization and speed increase so as to guide the air flow to be blown out; a refrigeration device, the refrigeration device is arranged on the second housing, and the refrigeration device is used to drive refrigeration to reduce the temperature of the air flow at the air outlet end; 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 and the second speed increasing air duct for pressurization and speed increase to increase the air volume and the air supply distance; the air flow is blown out after being cooled by the refrigeration device.

[0007] Further, the first pressure plates are distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressure plates of the first air acceleration duct reverse the airflow to gather the air or guide the airflow forward to the second air acceleration duct, achieving the effect of gathering or pressurizing the airflow.

[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 circumferential 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 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, the refrigeration device includes a semiconductor refrigeration sheet and a cold conduction cover. An installation space is formed on one side of the air guide seat close to the air outlet end. The semiconductor refrigeration sheet is arranged in the installation space, and the cold conduction cover covers the installation space and contacts the semiconductor refrigeration sheet.

[0011] Further, a drive circuit board is included, and the drive circuit board is used to control the operation or stop of components.

[0012] Further, an air inlet cover is included. The air inlet cover is provided with a hollow accommodating portion along 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.

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

[0014] Further, a power supply interface for providing power is included, and the power supply interface is electrically connected to the drive circuit board.

[0015] Further, a battery is included, and the battery is electrically connected to the power supply interface to charge the battery and store electric energy.

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

[0017] 1. Install the refrigeration device at the position of the second housing. The refrigeration device cools when driven. When the air flow passes through the refrigeration device, the refrigeration device cools down the air flow, and the blown air flow has a lower temperature, which can quickly cool down the user and improve the cooling effect.

[0018] 2. When the air flow passes through the first speed-increasing air duct, the first pressure-enhancing piece provided in the first speed-increasing air duct causes the radial ventilation area to become smaller to achieve pressurization of the air flow. At the same time, the first speed-increasing air duct 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-increasing air duct, under the action of the second pressure-enhancing piece in the second speed-increasing air duct, the air flow is further pressurized in the second stage, thereby achieving an increase in the air volume and the air supply distance of the air flow.

[0019] 3. The first pressure-enhancing pieces in the first speed-increasing air duct are arranged clockwise or counterclockwise to gather or pressurize and guide the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0022] Figure 3 It is an exploded structural diagram of the present utility model.

[0023] Figure 4 It is a sectional structural diagram of the present utility model.

[0024] Figure 5 It is a schematic structural diagram of the first housing.

[0025] Figure 6 It is a schematic structural diagram of the first housing.

[0026] Figure 7 It is a schematic structural diagram of the second housing.

[0027] Figure 8 It is a schematic structural diagram of the second housing.

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

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

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

[0031] Figure 12 It is a schematic structural diagram of the refrigeration device.

[0032] Figure 13 It is a schematic structural diagram of the air inlet hood.

[0033] Reference numerals: 1, first housing; 2, second housing; 3, refrigeration device; 4, motor; 5, fan blade; 6, motor mounting base; 7, first pressing piece; 8, first outer ring; 9, first speed-up air duct; 10, air guide base; 11, second pressing piece; 12, second outer ring; 13, second speed-up air duct; 14, stator; 15, rotor; 16, convex column; 17, hub portion; 18, blade; 19, storage portion; 20, iron core; 21, coil; 22, rotating shaft; 23, magnetic ring; 24, semiconductor refrigeration sheet; 25, heat conduction cover; 26, air inlet cover. 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 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 meanings of "several" and "multiple" are two or more, unless otherwise specifically and clearly defined. In the present application, unless otherwise clearly specified and defined, the terms "mounted", "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 communication inside 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 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 therebetween. 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", "below" and "beneath" 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 in the figure, a stage speed increase and cooling air flow generator is provided, including: a first housing 1, a second housing 2, a refrigeration device 3, a motor 4, and a fan blade 5; the first housing 1 is located at the air inlet end; the first housing 1 includes a motor mounting seat 6, one or more first pressurizing pieces 7, and a first outer ring 8; the motor 4 is arranged on the motor mounting seat 6; the fan blade 5 is arranged at the output end of the motor 4; the first pressurizing pieces 7 are distributed on the inner wall of the first outer ring 8 and extend to connect the outer periphery of the motor mounting seat 6; the inner wall of the first outer ring 8, the first pressurizing pieces 7, and the motor mounting seat 6 form a first speed increasing air duct 9, and the first speed increasing air duct 9 increases the air pressure and speed by reducing the radial ventilation area through the first pressurizing pieces 7; a second housing 2, the second housing 2 is arranged at the air outlet end of the first housing 1; the second housing 2 includes a wind guiding seat 10, one or more second pressurizing pieces 11, and a second outer ring 12; the second pressurizing pieces 11 are distributed on the inner wall of the second outer ring 12 and extend to connect the outer periphery of the wind guiding seat 10; the second outer ring 12, the second pressurizing pieces 11, and the wind guiding seat 10 form a second speed increasing air duct 13, and the second speed increasing air duct 13 increases the air pressure and speed by reducing the radial ventilation area through the second pressurizing pieces 11 to direct the air flow out; a refrigeration device 3, the refrigeration device 3 is arranged on the second housing 2, and the refrigeration device 3 is used to drive refrigeration to reduce the temperature of the air flow at the air outlet end; wherein, the motor 4 drives the fan blade 5 to rotate to generate negative pressure at the air inlet end to direct the air flow to the first speed increasing air duct 9 and the second speed increasing air duct 13 to increase the air volume and the air supply distance after pressurizing and speed increasing; the air flow is blown out after being cooled by the refrigeration device 3.

[0037] As Figure 5 and Figure 6 shown, for the first housing 1 including the motor mounting seat 6, the first pressurizing piece 7, and the first outer ring 8, the motor mounting seat 6 and the first outer ring 8 can be integrally formed or independent components, and the motor mounting seat can be arranged at the air inlet end position or the air outlet end position of the first outer ring 8. As an implementable technical solution, the motor mounting seat 6 and the first outer ring 8 are integrally formed and the motor mounting seat 6 is arranged at the air outlet end of the first outer ring 8. The first pressurizing pieces 7 can be evenly distributed or unevenly distributed between the first outer ring 8 and the motor mounting seat 6. Preferably, the first pressurizing pieces 7 are evenly distributed in a circumferential form. Due to the existence of the first pressurizing pieces 7, the radial ventilation area of the air flow passing through the first outer ring 8 becomes smaller, and since the first housing 1 is located at the air inlet end, the air flow can suck and gather the surrounding air flow, increasing the air volume; at the same time, the air flow is pressurized to increase the air flow speed.

[0038] As Figure 7 and Figure 8, the second housing 2 includes a second outer ring 12, a wind guiding seat 10, and a second pressing piece 11. Among them, the second outer ring 12, the wind guiding seat 10, and the second pressing piece 11 can be integrally formed or in the form of independent components. Preferably, the second outer ring 12, the wind guiding seat 10, and the second pressing piece 11 are integrally formed. The second housing 2 can be integrated with the first housing 1 or the second housing 2 can be an independent component form with the first housing 1. The second pressing piece 11 can be evenly distributed or unevenly distributed between the second outer ring 12 and the wind guiding seat 10. Preferably, the second pressing piece 11 is evenly distributed in a circumferential form. The presence of the second pressing piece 11 in the second speed increasing air duct 13 causes the radial ventilation area of the air flow passing through the second outer ring to become smaller, further pressurizing the air flow and increasing the air flow speed.

[0039] As Figure 3 shown, for the refrigeration device 3, its function is to refrigerate when driving. The refrigeration device 3 is arranged on the second housing 2. When the air flow passes through the first speed increasing air duct 9 and the second speed increasing air duct 13 for pressurization and speed increase, under the action of the refrigeration device 3, the blown air flow is refrigerated and cooled, so that the temperature of the blown air flow is low and has a better cooling effect. Or the refrigeration device 3 is directly in contact with the user's skin, and the user is cooled by means of heat conduction, which enriches the usage mode and is more suitable for wide use.

[0040] Refer to Figure 6 and Figure 8 shown, the first pressing piece 7 is distributed clockwise or counterclockwise from the air inlet end to the air outlet end, so that the first pressing piece 7 of the first speed increasing air duct 9 reversely gathers the air flow or guides the air flow forward to the second speed increasing air duct 13, achieving the effect of gathering or pressurizing the air flow.

[0041] As a preferred technical solution, in an implementable manner, the first pressing piece 7 is arranged clockwise. Since the air flow moves centrifugally along the circumferential direction of the fan blade 5 driven by the fan blade 5, the setting direction of the first pressing piece 7 of the first speed increasing air duct 9 is opposite to the direction of the air flow movement. The first pressing piece 7 gathers the air flow moving in all directions and changes the flow direction of the air flow; thus, the second pressing piece 11 guides out the gathered air flow, and then the air flow passing through the second speed increasing air duct 13 blows out directly. Avoiding the dispersed blowing of the air flow and causing air volume loss, achieving the effect of gathering and pressurizing the air flow.

[0042] In another implementable manner, the first pressurizing piece 7 is arranged in a counterclockwise direction. Since the air flow is driven by the fan blade 5, the air flow moves centrifugally in the circumferential direction around the fan blade 5. The arrangement direction of the first pressurizing piece 7 of the first air speed increasing duct 9 is the same as the direction of the air flow movement. The first pressurizing piece 7 guides and pressurizes the air moving in all directions, so that the second pressurizing piece 11 guides out the air flow, and then the air passing through the second air speed increasing duct 13 is blown out frontally, avoiding the dispersed blowing of the air flow and causing air volume loss.

[0043] Reference Figure 3 、 Figure 5 、 Figure 9-11 As shown in the figure, the motor 4 includes a stator 14 and a rotor 15. The stator 14 is fixed on the motor mounting seat 6, the rotor 15 is arranged on the fan blade 5, and the rotor 15 is sleeved on the stator 14. In implementation, the motor 4 can adopt the form of a brushed motor or a brushless motor.

[0044] The motor mounting seat 6 is provided with a convex column 16 extending axially and having a hollow interior; the fan blade 5 includes a hub portion 17 and blades 18 uniformly arranged on the outer peripheral surface of the hub portion 17. The hub portion 17 has a receiving portion 19 recessed inward; the stator 14 includes an iron core 20 inserted on the convex column 16 and a coil 21 wound around the iron core 20; the rotor 15 includes a rotating shaft 22 axially arranged in the receiving portion 19 and a magnetic ring 23 attached to the radial inner wall of the receiving portion 19, and the rotating shaft 22 is inserted into the convex column 16.

[0045] Preferably, as an implementable technical solution, the motor 4 adopts an outer rotor brushless motor. Structurally, the hub portion 17 of the fan blade 5 is provided with a receiving portion 19, which is used as the installation position of the rotor 15. The magnetic ring 23 and the rotating shaft 22 of the rotor 15 are arranged at the position of the receiving portion 19. Furthermore, the structure can be optimized and the number of components can be saved. At the same time, a hollow convex column 16 is arranged on the motor mounting seat 6 to facilitate the insertion of the rotating shaft 22 into the convex column 16 for positioning. At the same time, the iron core 20 and the coil 21 of the stator 14 can be sleeved on the convex column 16 for positioning. The driving of the fan blade 5 is realized through the designed outer rotor brushless motor structure, and the structure can be made more compact, saving the number of components, thereby reducing costs.

[0046] Reference Figure 12 As shown in the figure, the refrigeration device 3 includes a semiconductor refrigeration sheet 24 and a heat conduction cover 25. An installation space is formed on one side of the air guide seat 10 close to the air outlet end. The semiconductor refrigeration sheet 24 is arranged in the installation space, and the heat conduction cover 25 covers the installation space and is in contact with the semiconductor refrigeration sheet 24.

[0047] As an alternative embodiment, the refrigeration device 3 can be composed of a thermoelectric cooler 24 and a heat conduction cover 25. For easy installation, an installation space is provided on the air guide base 10. The installation space is formed by depression, and the refrigeration device 3 is arranged in the installation space. The cold surface of the refrigeration device 3 contacts the heat conduction cover 25 for heat transfer. Thus, when the air flow blows out from the second air acceleration duct, under the refrigeration and cooling of the refrigeration device 3, the temperature at the position of the air guide base 10 is low. After the air flow blows out, it can cool the air flow, improving the cooling effect on users. At the same time, after the heat conduction cover 25 transfers heat with the semiconductor and contacts the user's skin, it can bring a refreshing cooling experience to the customer, having the advantages of rich usage methods and good cooling effects.

[0048] The present utility model further includes a drive circuit board, which is used to control the operation or stop of components. Among them, the provided drive circuit board can be in the form of one or more sheets, and the installation position of the drive circuit board can be selected according to actual conditions, without limitation in this regard. The drive circuit board is mainly used to control the operation or stop of components, such as controlling the motor 4 to rotate or stop, controlling the drive or stop of the refrigeration device 3, etc. The drive circuit board is not drawn in the drawings.

[0049] As Figure 13 As shown, the present utility model includes an air inlet cover 26. The air inlet cover 26 is provided with a hollow accommodating portion along the air inlet end to the air outlet end, and at least a part of the accommodating portion extends to the first housing 1 or the second housing 2; to form a wrapping of the first housing 1 or the first housing 1 and the second housing 2, or to form an accommodation in the first housing 1 or the first housing 1 and the second housing 2.

[0050] In a further technical solution, the air inlet cover 26 is added. The air inlet cover 26 is of a hollow structure to form an accommodating portion. The air inlet cover 26 can be arranged on one side of the first housing 1. In the first embodiment, the air inlet cover 26 can accommodate the first housing 1 and the second housing 2 through the accommodating portion; in the second embodiment, the air inlet cover 26 can accommodate the first housing 1; in the third embodiment, the accommodating portion of the air inlet cover 26 can be accommodated in the first housing 1 or the second housing 2; in the fourth embodiment, the accommodating portion of the air inlet cover 26 can be accommodated in the first housing 1. Preferably, the fourth embodiment is adopted in the present utility model. The air inlet cover 26 is provided with an air inlet grille at the air inlet end. 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 air inlet cover 26 to form a gap for preventing foreign objects from entering. The air inlet grille is not drawn in the drawings.

[0051] The blades 18 of the fan blade 5 are distributed counterclockwise from the air inlet end to the air outlet end.

[0052] The utility model includes a power supply interface for providing power, and the power supply interface is electrically connected to the drive circuit board. Among them, the power supply interface can be used as a connecting wire, such as using a plug and a socket for power supply, or electrically connecting to a battery for power supply. The power supply interface is not drawn in the figure.

[0053] It further includes a battery, and the battery is electrically connected to the power supply interface so as to charge the battery to store electric energy, achieve endurance, and facilitate going out and carrying. The battery is not drawn in the figure.

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

Claims

1. A stage acceleration and cooling air flow generator, characterized in that Comprising: A first housing, a second housing, a refrigeration device, a motor, and a fan blade; The first housing is located at the air inlet end; the first housing includes a motor mounting seat, one or more first pressurizing pieces, and a first outer ring; the motor is disposed on the motor mounting seat; the fan blade is disposed 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 through the first pressurizing pieces, resulting in a smaller radial ventilation area to form air flow pressurization and speed increase; A second housing, the second housing is disposed at the air outlet end of the first housing; the second housing includes a wind guiding seat, one or more second pressurizing pieces, and a second outer ring; the second pressurizing pieces are distributed on the inner wall of the second outer ring and extend to connect the outer periphery of the wind guiding seat; the second outer ring, the second pressurizing pieces, and the wind guiding 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 form air flow pressurization and speed increase to direct the air flow out; A refrigeration device, the refrigeration device is disposed on the second housing, and the refrigeration device is used to drive refrigeration to reduce the temperature of the air flow at the air outlet end; 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 and the second speed increasing air duct for pressurization and speed increase, increasing the air volume and the air supply distance; the air flow is blown out after being cooled by the refrigeration device.

2. The stage speed increasing and cooling air flow generator 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 reverse the air flow or guide the air flow forward to the second speed increasing air duct, achieving the effect of air flow concentration or pressurized air guiding.

3. The stage speed increasing and cooling air flow generator 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 disposed on the fan blade, and the rotor is sleeved on the stator.

4. The stage speed increasing and cooling air flow generator 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 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.

5. The stage speed increasing and cooling air flow generator according to any one of claims 1-4, wherein: The refrigeration device includes a semiconductor refrigeration sheet and a heat conduction cover, an installation space is formed on one side of the wind guiding seat close to the air outlet end, the semiconductor refrigeration sheet is disposed in the installation space, and the heat conduction cover covers the installation space and contacts the semiconductor refrigeration sheet.

6. The stage speed increase and cooling air flow generator according to claim 5, wherein: It includes a drive circuit board, and the drive circuit board is used to control the operation or stop of components.

7. The stage speed increase and cooling air flow generator according to claim 5, wherein: It includes an air inlet hood, and the air inlet hood 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 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.

8. The stage speed increase and cooling air flow generator according to claim 5, wherein: The blades of the fan blades are distributed counterclockwise from the air inlet end to the air outlet end.

9. The stage speed increase and cooling air flow generator according to claim 6, wherein: It includes a power supply interface for providing power, and the power supply interface is electrically connected to the drive circuit board.

10. The stage acceleration and cooling air flow generator according to claim 9, wherein: It includes a battery, and the battery is electrically connected to the power supply interface to charge the battery and store electric energy.

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