High-speed fan

Abstract

The invention provides a high-speed fan. The high-speed fan comprises a motor assembly; the fan shell is connected with the motor assembly in a sleeving mode, an air inlet end and an air outlet end are formed in the air flow generation direction in cooperation with the periphery of the motor assembly, and a plurality of air guide pieces spirally extending outwards from the center are arranged on the surface, located at the air outlet end, of the motor assembly; the annular air inlet cover is connected with the air inlet end of the fan shell; the arc-shaped air outlet cover is connected with the air outlet end of the fan shell, the space between the outer wall of the fan shell and the inner wall of the arc-shaped air outlet cover is divided by air guide pieces to form a plurality of spiral air channels arranged in the annular direction, air generated by the motor assembly flows through the spiral air channels and is divided into sub-air flows, and the sub-air flows are independently emitted outwards from an air outlet opening in the center of the arc-shaped air outlet cover. Through the improvement of the air duct structure, on the premise that the power of the motor is not changed, the air outlet amount of the fan is effectively increased, and meanwhile the mute effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning equipment, in particular to a high-speed fan. Background Art

[0002] In order to be miniaturized, existing bladeless high-speed fans usually use vertical rotating shaft fans. Due to the need to bend the direction of the airflow (the air flow should be emitted in a horizontal direction), the wind force of bladeless high-speed fans is smaller and the quietness is poor compared with traditional high-speed fans of similar size.

[0003] Figure 1 The structure diagram of the bladeless fan in the prior art is shown in FIG. Figure 1 As shown, the fan 9 of the bladeless fan includes: a casing 91, a motor 92, an air inlet 93, an air outlet 94 and a plate-shaped air guide 96, wherein the casing 91 surrounds the motor 92, and an air duct 95 is formed between the inner wall of the casing 91 and the outer wall of the motor 92, the air inlet 93 and the air outlet 94 are respectively arranged at the inlet and outlet of the air duct 95, and the plate-shaped air guide 96 is arranged in the air duct 95 in a central radial arrangement, cutting the air flow generated by the motor 92 into several sub-air flows, which converge in front of the air outlet 94 and then emit outward.

[0004] However, due to the limitations of existing motor technology, if a high-power motor is used for the bladeless fan of the above structure, although the wind speed can be increased, the noise will be significantly increased; if a low-power motor is used, although the silent effect is excellent, the wind force will be weakened, forming a technical contradiction between wind force and silentness.

[0005] Therefore, the present invention provides a high-speed blower. Summary of the Invention

[0006] In response to the problems in the prior art, the purpose of the present invention is to provide a high-speed fan that overcomes the problems of the prior art and can effectively increase the air output of the fan while improving the noise reduction effect while keeping the motor power unchanged by improving the air duct structure.

[0007] An embodiment of the present invention provides a high-speed blower, comprising:

[0008] Motor components;

[0009] The fan housing is sleeved with the motor assembly and cooperates with the outer periphery of the motor assembly to form an air inlet end and an air outlet end along the direction of the air flow. The surface of the motor assembly at the air outlet end is provided with a plurality of air guide blades extending spirally outward from the center;

[0010] an annular air inlet cover connected to the air inlet end of the fan housing; and

[0011] A circular arc air outlet cover is connected to the air outlet end of the fan housing. The outer wall of the fan housing and the inner wall of the circular arc air outlet cover are divided by the air guide plate to form a plurality of spiral air ducts arranged in a circular direction. The air flow generated by the motor assembly is divided into sub-air flows through the spiral air ducts, and the sub-air flows are independently emitted outward from the air outlet opening in the center of the circular arc air outlet cover.

[0012] Preferably, the air outlet opening edge of the arc air outlet cover is provided with a serrated edge.

[0013] Preferably, the air guide plate has an upper edge protruding above the fan housing and side edges protruding laterally from the fan housing, and the side edges respectively abut against the inner sides of the tips of the serrated edges.

[0014] Preferably, the side edge forms an arc-shaped contact track with the inner wall of the arc air outlet cover.

[0015] Preferably, the motor assembly comprises:

[0016] Motor;

[0017] The motor upper shell and the motor lower shell enclose the motor; and

[0018] The impeller is arranged on a side of the motor lower shell facing away from the motor. The impeller is rotated by the motor to generate air flow.

[0019] Preferably, a plurality of positioning sleeves are provided on the periphery of the motor assembly;

[0020] The outer periphery of the arc air outlet cover is provided with a plurality of first positioning screw seats;

[0021] A plurality of second positioning screw seats are provided on the outer periphery of the fan housing. The second positioning screw seats are plugged into the positioning sleeve. The first positioning screw seat is screwed to the second positioning screw seat protruding from the positioning sleeve.

[0022] Preferably, the impeller is arranged between the inner side of the air inlet end of the fan housing and the outer surface of the motor lower housing.

[0023] Preferably, the upper shell of the motor is provided with a plurality of heat dissipation holes connected to the motor, and the heat dissipation holes are exposed at the air outlet opening.

[0024] Preferably, the end of the spiral air duct is connected to the air outlet.

[0025] Preferably, a central protrusion is provided in the center of the upper shell of the motor, and the air guide plate is connected to the inner wall of the annular air inlet cover from the outer periphery of the central protrusion.

[0026] Preferably, the surface of the motor upper shell is also provided with an annular groove surrounding the central protrusion, and the annular groove is exposed at the air outlet opening. The annular groove changes the direction of the return air flow entering the air outlet opening so that the return air flow and the sub-air flow merge in the same direction.

[0027] Preferably, the heat dissipation holes are distributed on the outer periphery of the central protrusion and in the annular groove.

[0028] The high-speed fan of the present invention can effectively increase the air output of the fan and improve the quietness effect by improving the air duct structure under the premise of unchanged motor power. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0030] Figure 1 The diagram is a structural diagram of a bladeless fan in the prior art.

[0031] Figure 2 It is a three-dimensional diagram of the high-speed blower of the present invention.

[0032] Figure 3 It is a side view of the high-speed blower of the present invention.

[0033] Figure 4 It is a top view of the high-speed blower of the present invention.

[0034] Figure 5 It is a cross-sectional view of the high-speed blower of the present invention.

[0035] Figure 6 This is a three-dimensional diagram of the high-speed fan of the present invention with the arc air outlet cover removed.

[0036] Figure 7 This is a side view of the high-speed fan of the present invention with the arc air outlet cover removed.

[0037] Figure 8 This is a top view of the high-speed fan of the present invention with the arc air outlet cover removed.

[0038] Figure 9 This is a cross-sectional view of the high-speed fan of the present invention after removing the arc air outlet cover.

[0039] Figure 10 It is a three-dimensional view of the arc air outlet cover of the high-speed fan of the present invention.

[0040] Figure 11 It is a side view of the arc air outlet cover of the high-speed fan of the present invention.

[0041] Figure 12It is a top view of the arc air outlet cover of the high-speed fan of the present invention.

[0042] Figure 13 The figure is a schematic diagram of an air duct of a high-speed fan of the present invention in a working state.

[0043] Figure 14 This is a schematic diagram of the air duct of the high-speed fan of the present invention in another working state.

[0044] Reference numerals

[0045] 1 Arc air outlet cover

[0046] 11 Jagged Edges

[0047] 12 air outlet openings

[0048] 13 First positioning screw seat

[0049] 2 Motor assembly

[0050] 20 Positioning sleeve

[0051] 21 Central bulge

[0052] 22 air guide vanes

[0053] 221 upper edge

[0054] 222 side edge

[0055] 23 Spiral Air Duct

[0056] 24 cooling holes

[0057] 25 annular groove

[0058] 26 Motor upper housing

[0059] 27 Motor lower housing

[0060] 28 impeller

[0061] 29 Motor

[0062] 3 Fan housing

[0063] 31 Second positioning screw seat

[0064] 4 Air intake hood

[0065] 9 Traditional fans

[0066] 91 shell

[0067] 92 Motor

[0068] 93 air inlet

[0069] 94 air outlet

[0070] 95 air duct

[0071] 96 Plate-shaped air guide DETAILED DESCRIPTION

[0072] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through different specific embodiments. The details in the present application can also be modified or changed according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other unless they conflict.

[0073] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0074] In the description of this application, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this application, as well as features of different embodiments or examples, unless otherwise contradictory.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include at least one such feature. In the context of this application, "plurality" means two or more, unless otherwise specifically defined.

[0076] In order to clearly describe the present application, components not related to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0077] Throughout this specification, when a device is said to be "connected" to another device, this includes not only "direct connection" but also "indirect connection" with other elements interposed therebetween. Furthermore, when a device is said to "include" a certain component, unless otherwise stated, this does not exclude the inclusion of other components but rather implies that the device may include other components.

[0078] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly on" another device, there are no other devices between it.

[0079] Although the terms first, second, etc. are used in some instances herein to represent various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are represented. Furthermore, as used in this article, the singular forms "one," "an," and "the" are intended to also include the plural forms, unless there is a contrary indication in the context. It should be further understood that the terms "comprise," "include," and "include" indicate the presence of features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0080] The technical terms used herein are intended only to refer to specific embodiments and are not intended to limit this application. The singular form used herein also includes the plural form unless the statement explicitly indicates otherwise. The term "comprising" as used in this specification is intended to specify specific features, regions, integers, steps, operations, elements, and / or components and does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, and / or components.

[0081] Although not defined differently, all terms used herein, including technical and scientific terms, have the same meanings as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are to be interpreted as having meanings consistent with the relevant technical literature and current teachings, and unless otherwise defined, they should not be overly interpreted as ideal or highly formalized meanings.

[0082] Figure 2 It is a three-dimensional diagram of the high-speed blower of the present invention. Figure 3 It is a side view of the high-speed blower of the present invention. Figure 4 It is a top view of the high-speed blower of the present invention. Figure 5 : is a cross-sectional view of the high-speed blower of the present invention. Figures 2 to 5As shown, the present invention provides a high-speed fan, comprising: a motor assembly 2, a fan housing 3, an annular air inlet cover 4 and an arc air outlet cover 1. The fan housing 3 is sleeved on the motor assembly 2, and cooperates with the outer periphery of the motor assembly 2 to form an air inlet end and an air outlet end along the direction of the air flow. The surface of the motor assembly 2 at the air outlet end is provided with a plurality of air guide blades 22 extending spirally outward from the center. The annular air inlet cover 4 is connected to the air inlet end of the fan housing 3. The arc air outlet cover 1 is connected to the air outlet end of the fan housing 3. The outer wall of the fan housing 3 and the inner wall of the arc air outlet cover 1 are divided by the air guide blades 22 to form a plurality of spiral air ducts 23 arranged in a circular direction. The air flow generated by the motor assembly 2 is divided into sub-air flows through the spiral air ducts 23, and the sub-air flows are independently emitted outward from the air outlet opening 12 in the center of the arc air outlet cover 1. The spiral air duct 23 in the present invention is different from the linear air duct of the prior art. Instead, the cross-sectional shape of the air duct rotates along the extension direction of the air duct, thereby better guiding the high-speed air flow generated by the fan outward. The present invention greatly increases the air output by providing a spiral air duct 23 in the narrow interior of the fan to cooperate with the motor impeller to generate air flow. In addition, the impact of the air flow inside the air duct is reduced, and the weakening of the air flow by the air duct and the related noise are reduced. This breakthrough achieves the premise of not increasing the motor power while increasing the air output while reducing the noise of the entire machine, thereby greatly improving the performance of the fan and optimizing the overall performance of the bladeless fan using the present invention.

[0083] In a preferred embodiment, the edge of the air outlet opening 12 of the arc air outlet cover 1 is provided with a serrated edge 11, and the serrated edge 11 is equivalent to being arranged at the end of the spiral air duct 23, thereby effectively reducing wind noise, but not limited to this.

[0084] In a preferred embodiment, the air guide plate 22 has an upper edge 221 protruding above the fan housing 3 and a side edge 222 protruding from the side of the fan housing 3. The side edges 222 respectively abut the inner side of the tip of the serrated edge 11, and the side edges 222 form an arc-shaped contact trajectory with the inner wall of the arc air outlet cover 1, thereby ensuring that the end of the spiral air duct 23 can be directly connected to the air outlet opening 12 (the air outlet opening 12 is also divided by the spiral air duct 23). Each sub-air flow leaving the spiral air duct 23 does not need to converge again inside the machine body, but is directly emitted outward independently from the air outlet opening 12, thereby reducing noise, but not limited to this.

[0085] Figure 6 This is a three-dimensional diagram of the high-speed fan of the present invention with the arc air outlet cover removed. Figure 7 This is a side view of the high-speed fan of the present invention with the arc air outlet cover removed. Figure 8 This is a top view of the high-speed fan of the present invention with the arc air outlet cover removed. Figure 9 This is a cross-sectional view of the high-speed fan of the present invention after removing the arc air outlet cover. Figures 6 to 9As shown, in a preferred embodiment, the motor assembly 2 of the present invention includes: a motor 29, an upper motor housing 26, a lower motor housing 27, and an impeller 28. The upper motor housing 26 and the lower motor housing 27 enclose the motor 29. The impeller 28 is disposed on the side of the lower motor housing 27 facing away from the motor 29. The impeller 28 is rotated by the motor 29 to generate air flow, but the present invention is not limited to this.

[0086] In a preferred embodiment, the impeller 28 is disposed between the inner side of the air inlet end of the fan housing 3 and the outer surface of the motor lower housing 27 , but the present invention is not limited thereto.

[0087] In a preferred embodiment, the motor upper shell 26 is provided with a plurality of heat dissipation holes 24 connected to the motor 29 , and the heat dissipation holes 24 are exposed to the air outlet 12 , but the present invention is not limited thereto.

[0088] In a preferred embodiment, a central protrusion 21 is provided in the center of the motor upper shell 26 , and the air guide blades 22 are connected from the outer periphery of the central protrusion 21 to the inner wall of the annular air inlet cover 4 , but the present invention is not limited thereto.

[0089] In a preferred embodiment, the surface of the motor upper shell 26 is further provided with an annular groove 25 surrounding the central protrusion 21, and the annular groove 25 is exposed at the air outlet opening 12. The annular groove 25 changes the direction of the return air flow entering the air outlet opening 12 so that the return air flow and the sub-air flow merge in the same direction, but it is not limited to this.

[0090] In a preferred embodiment, the heat dissipation holes 24 are distributed on the outer periphery of the central protrusion 21 and in the annular groove 25 , but the present invention is not limited thereto.

[0091] Figure 10 It is a three-dimensional view of the arc air outlet cover of the high-speed fan of the present invention. Figure 11 It is a side view of the arc air outlet cover of the high-speed fan of the present invention. Figure 12 FIG. 1 is a top view of the arc air outlet cover of the high-speed fan of the present invention. Figures 10 to 12 As shown, in a preferred embodiment, a plurality of positioning sleeves 20 are provided on the outer periphery of the motor assembly 2. A plurality of first positioning screw seats 13 are provided on the outer periphery of the arc air outlet cover 1. A plurality of second positioning screw seats 31 are provided on the outer periphery of the fan housing 3. The second positioning screw seats 31 are plugged into the positioning sleeves 20, and the first positioning screw seats 13 are screwed to the second positioning screw seats 31 protruding from the positioning sleeves 20, thereby improving the alignment accuracy and connection strength of the arc air outlet cover 1, the fan housing 3 and the motor assembly 2, and reducing the noise generated by shaking between the arc air outlet cover 1, the fan housing 3 and the motor assembly 2, but the present invention is not limited thereto.

[0092] Figure 13 FIG. 1 is a schematic diagram of an air duct in a working state of a high-speed blower of the present invention. Figure 13As shown, in the high-speed fan of the present invention, the annular air inlet cover 4 is connected to the air inlet end of the fan housing 3. The surface of the motor assembly 2 at the air outlet end is provided with a plurality of air guide vanes 22 extending spirally outward from the center. The arc air outlet cover 1 is connected to the air outlet end of the fan housing 3, and the outer wall of the fan housing 3 and the inner wall of the arc air outlet cover 1 are divided by the air guide vanes 22 to form a plurality of spiral air ducts 23 arranged in a circular direction. The impeller 28 is rotated by the motor 29 to generate an air flow L1. When the high-speed fan of the present invention is working, the air flow L1 generated by the motor assembly 2 is diverted into a plurality of sub-air flows L2 through the spiral air duct 23, and the sub-air flows L2 are independently emitted outward from the air outlet opening 12 in the center of the arc air outlet cover 1. The edge of the air outlet opening 12 of the arc air outlet cover 1 is provided with a serrated edge 11, which is equivalent to being set at the end of the spiral air duct 23. The air guide blade 22 has an upper edge 221 protruding above the fan housing 3 and a side edge 222 protruding from the side of the fan housing 3. The side edges 222 respectively abut the inner side of the tip of the serrated edge 11. The side edges 222 form an arc-shaped contact trajectory with the inner wall of the arc air outlet cover 1, thereby ensuring that the end of the spiral air duct 23 can be directly connected to the air outlet opening 12. The sub-air flows L2 leaving the spiral air duct 23 do not need to be gathered, but are directly and independently emitted outward from the air outlet opening 12 (the sub-air flows L2 emitted from the spiral air duct 23 will not re-merge in the annular air inlet cover 4), thereby reducing noise. Based on the combination of the functions of the spiral air duct 23 and the serrated edge 11 set at the tail of the spiral air duct 23 (see Figure 1 Compared with the combination of a straight air duct and a plate-shaped air guide in the prior art), the present invention can greatly enhance the air output, reduce the impact of the air flow inside the air duct, reduce the weakening of the air flow by the air duct and the related noise, and achieve a breakthrough in reducing the noise of the whole machine while increasing the air output without increasing the power of the motor, thereby greatly improving the performance of the fan and optimizing the performance of the whole machine using the bladeless fan of the present invention.

[0093] Figure 14 FIG. 1 is a schematic diagram of another working state of the high-speed fan of the present invention. Figure 14As shown, due to the structural improvement of the high-speed fan of the present invention, the sub-air flow L2 is mainly emitted outward through the outer end of the opening at the end of each spiral air duct, which is away from the center of the circle. Since the airflow of the sub-air flow L2 is strong, this will form an inwardly sucked return air flow L3 at the end of the spiral air duct, close to the center of the circle (equivalent to each spiral air duct in the radial direction, the outer end forms a positive pressure emitted outward, and the inner end close to the center of the circle forms a negative pressure free air flow). Due to the continuous emission of the sub-air flow L2, the inhaled return air flow L3 increases and flows outward along the upper surface of the return air flow L3 until it accumulates at the end of the spiral air duct. This return air flow L3, which is almost opposite to the direction of the sub-air flow L2, forms an air wall, resulting in air volume loss and easily generates additional noise. In order to further reduce the negative impact of the return air flow L3, in the present invention, Figure 12 Based on the embodiment of the present invention, a central protrusion 21 is provided in the center of the motor upper shell 26, and air guide blades 22 are connected from the outer periphery of the central protrusion 21 to the inner wall of the annular air inlet cover 4. The surface of the motor upper shell 26 is also provided with an annular groove 25 surrounding the central protrusion 21. The annular groove 25 is exposed at the air outlet opening 12. The bottom of the annular groove 25 has an arc cross-section, so that the annular groove 25 changes the direction of the return air flow L3 entering the air outlet opening 12, so that the bent return air flow merges with the sub-air flow L2 in the forward direction. The heat dissipation holes 24 are distributed on the outer periphery of the central protrusion 21 and in the annular groove 25. The hot air passing through the heat dissipation holes is carried out by the return air flow L3 and merges with the sub-air flow in the forward direction and is emitted outward.

[0094] In another variation, the present invention may also Figure 12 Based on the embodiment of FIG, a central protrusion 21 is provided in the center of the motor upper housing 26. Air guide blades 22 extend from the outer periphery of the central protrusion 21 to the inner wall of the annular air inlet cover 4. An annular groove 25 is also provided on the surface of the motor upper housing 26, surrounding the central protrusion 21. The annular groove 25 is exposed at the air outlet opening 12 and has a relatively large depth. This allows the annular groove 25 to block the return air flow L3 from flowing along the surface of the motor upper housing 26 toward the sub-air flow L2, but the present invention is not limited to this.

[0095] In summary, the purpose of the present invention is to provide a high-speed fan that can effectively increase the air output of the fan while improving the noise reduction effect by improving the air duct structure while keeping the motor power unchanged.

[0096] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A high-speed fan, characterized in that: include: Motor assembly (2); A fan housing (3) is sleeved on the motor assembly (2) and cooperates with the outer periphery of the motor assembly (2) to form an air inlet end and an air outlet end along the direction of generating air flow, and a surface of the motor assembly (2) located at the air outlet end is provided with a plurality of air guide blades (22) extending spirally outward from the center; An annular air inlet cover (4) connected to the air inlet end of the fan housing (3); as well as The arc air outlet cover (1) is connected to the air outlet end of the fan housing (3); the outer wall of the fan housing (3) and the inner wall of the arc air outlet cover (1) are divided by the air guide plate (22) to form a plurality of spiral air ducts (23) arranged in a circular direction; the air flow generated by the motor assembly (2) is divided into sub-air flows through the spiral air ducts (23); and the sub-air flows are independently emitted outward from the air outlet opening (12) in the center of the arc air outlet cover (1).

2. The high-speed blower according to claim 1, characterized in that: The edge of the air outlet opening (12) of the arc air outlet cover (1) is provided with a serrated edge (11).

3. The high-speed blower according to claim 2, characterized in that: The air guide plate (22) has an upper edge (221) protruding above the fan housing (3) and a side edge (222) protruding laterally from the fan housing (3), and the side edges (222) respectively abut against the inner side of the tip of the serrated edge (11).

4. The high-speed blower according to claim 3, characterized in that: The side edge (222) forms an arc-shaped contact track with the inner wall of the arc air outlet cover (1).

5. The high-speed blower according to claim 1, characterized in that: The motor assembly (2) comprises: Motor (29); The motor upper shell (26) and the motor lower shell (27) enclose the motor (29); and The impeller (28) is arranged on a side of the motor lower housing (27) away from the motor (29), and the impeller (28) is rotated by the motor (29) to generate air flow.

6. The high-speed blower according to claim 5, characterized in that: A plurality of positioning sleeves (20) are provided on the outer periphery of the motor assembly (2); A plurality of first positioning screw seats (13) are provided on the outer periphery of the arc air outlet cover (1); The outer periphery of the fan housing (3) is provided with a plurality of second positioning screw seats (31), the second positioning screw seats (31) are plugged into the positioning sleeve (20), and the first positioning screw seat (13) is screwed to the second positioning screw seat (31) protruding from the positioning sleeve (20).

7. The high-speed blower according to claim 5, characterized in that: The impeller (28) is arranged between the inner side of the air inlet end of the fan housing (3) and the outer surface of the motor lower housing (27).

8. The high-speed blower according to claim 5, characterized in that: The motor upper shell (26) is provided with a plurality of heat dissipation holes (24) connected to the motor (29), and the heat dissipation holes (24) are exposed to the air outlet opening (12).

9. The high-speed blower according to claim 5, characterized in that: A central protrusion (21) is provided in the center of the motor upper shell (26), and the air guide plate (22) is connected to the inner wall of the annular air inlet cover (4) from the outer periphery of the central protrusion (21).

10. The high-speed blower according to claim 1, wherein: The end of the spiral air duct (23) is connected to the air outlet opening (12).

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