A hair dryer

Abstract

The application relates to the technical field of garden machinery, in particular to a blower. The blower comprises a casing and an integrated fan set arranged in a channel in the casing. The integrated fan set comprises a fan blade assembly, which comprises a fan blade and a hub fixedly connected with the fan blade on a radial outer periphery. The hub is concave along an axial direction and has an internal cavity. The integrated fan set further comprises an outer rotor motor assembly, which is at least partially embedded in the internal cavity of the hub and makes the fan blade at least partially located on a radial outer periphery of the outer rotor motor assembly. The outer rotor motor assembly comprises a power module and a motor shaft. The output end of the motor shaft is inserted and connected in the hub. The outer rotor motor assembly drives the fan blade assembly to rotate through the power module. The technical problem that the existing blower generates large vibration and noise is solved.

Description

Technical Field

[0001] This application relates to the field of garden machinery technology, and in particular to a hair dryer. Background Technology

[0002] In garden machinery, blowers are a common cleaning device for gardens, courtyards, and roads. They use airflow to blow fallen leaves, debris, and other debris away from a predetermined location for later collection or cleaning. However, most existing blowers generate significant vibration and noise during operation, affecting the user experience.

[0003] To address this issue, existing technologies typically involve adding vibration damping elements to the hair dryer's casing or duct to improve vibration. However, the damping effect is limited, especially at high speeds, where vibration cannot be completely eliminated, leading to a more complex structure. Furthermore, these damping elements themselves can age or fail due to long-term use, which can actually exacerbate the hair dryer's vibration and noise problem. Utility Model Content

[0004] The purpose of this application is to provide a hair dryer that solves the technical problem that existing hair dryers produce significant vibration and noise.

[0005] This application provides a hair dryer, including a housing and an integrated fan unit disposed within an inner duct of the housing, the integrated fan unit comprising:

[0006] A wind turbine assembly includes wind turbine blades and a hub fixedly connected to the wind turbine blades on their radial outer periphery, the hub having an internal cavity recessed in the axial direction; and

[0007] An external rotor motor assembly is at least partially embedded in the internal cavity of the hub, such that the fan blades are at least partially located on the radial outer periphery of the external rotor motor assembly. The external rotor motor assembly includes a power module and a motor shaft. The output end of the motor shaft is inserted into the hub. The external rotor motor assembly drives the fan blade assembly to rotate through its power module.

[0008] Furthermore, the hub is provided with a central hole extending along its central axis;

[0009] The output end of the motor shaft of the external rotor motor assembly is inserted and fixedly connected to the central hole, and the motor shaft of the external rotor motor assembly is arranged along its central axis direction, and the central axis direction of the external rotor motor assembly coincides with the central axis direction of the hub.

[0010] Furthermore, the radial projection area of ​​the fan blade at least partially overlaps with the radial projection area of ​​a portion of the main body of the external rotor motor assembly embedded in the fan blade assembly;

[0011] The radial projection area of ​​the portion of the external rotor motor assembly embedded in the fan blade assembly is the first radial projection area, and the radial projection area of ​​the fan blade is the second radial projection area. The overlapping area of ​​the first radial projection area and the second radial projection area accounts for 10% to 100% of the first radial projection area.

[0012] Furthermore, when the radial projection of the fan blade is located in the middle section of the radial projection of the portion of the outer rotor motor assembly embedded in the fan blade assembly, the second radial projection area entirely falls within the first radial projection area; or

[0013] When the radial projection of the fan blade is located at the rear section of the radial projection of the portion of the main body of the external rotor motor assembly embedded in the fan blade assembly, the second radial projection area partially falls within the first radial projection area; or

[0014] When the radial projection of the fan blade is located in front of the radial projection of the portion of the main body of the fan blade assembly into which the external rotor motor assembly is embedded, the second radial projection area partially falls within the first radial projection area.

[0015] Furthermore, the power module includes a stator and a rotor. The motor shaft is sleeved and connected to a bearing. The inner ring of the stator is sleeved and fixedly connected to the outer ring of the bearing. The inner ring of the rotor is spaced at the outer periphery of the stator. The outer ring of the rotor is fixedly connected to the circumferential inner wall of the internal cavity of the hub of the fan blade assembly. The rotation of the rotor drives the fan blade assembly to rotate.

[0016] Furthermore, the hair dryer also includes a blower duct, a diffuser duct, and a collector that are sequentially connected and communicate with each other along the axial direction. The diffuser duct and the collector are located inside the housing. A motor fixing end is provided in the duct of the collector. The integrated fan unit is fixedly installed on the motor fixing end. The side of the blower duct away from the diffuser duct is the air outlet, and the side of the collector away from the diffuser duct is the air inlet.

[0017] Furthermore, the collector has a motor fixing end on its axial direction, and a plurality of guide plates are arranged sequentially on the radial outer periphery of the motor fixing end;

[0018] The external rotor motor assembly also includes a stator bracket, which is fixedly connected to the bearing. The front end of the stator bracket is exposed and used for fixed connection with the motor fixed end.

[0019] Furthermore, the air duct includes an outer fixed cylinder and an inner guide cylinder sleeved inside the outer fixed cylinder. A first guide channel is formed between the inner guide cylinder and the outer fixed cylinder. The opposite sides of the first guide channel are respectively connected to the guide plate of the air duct and the collector.

[0020] Furthermore, the rear end face of the hub of the integrated fan unit away from its internal cavity is at least partially arc-shaped, and multiple heat dissipation holes are evenly arranged circumferentially on the arc-shaped surface.

[0021] The inner guide tube has a plurality of first through holes on its first end face near the air duct along its axial direction, and the other end of the inner guide tube opposite to its first end face is circumferentially connected to the outer periphery of the motor fixed end.

[0022] The motor fixed end is provided with multiple second through holes, and the interior of the inner guide tube and the integrated fan unit fixedly connected to the motor fixed end form a second heat dissipation channel.

[0023] Furthermore, the diameter of the pipe at the motor fixing end is larger than the diameter of the pipe at the first end face, and the diameter of the pipe at the first end face is smaller than the diameter of the pipe at the outer fixing cylinder; and / or

[0024] A grid baffle is provided on the side of the air duct near the air duct. The outer periphery of the grid baffle is fixedly connected to the outer fixed cylinder, and the inner periphery of the grid baffle is fixedly connected to the outer periphery of the inner guide cylinder.

[0025] Furthermore, the front edge of the collector near the air inlet is configured to gradually narrow in diameter along the air inlet direction, and a pressure ring is provided on the outer edge of the air inlet at the front edge of the collector.

[0026] Compared with the prior art, the blower provided in this application has an integrated fan blade assembly and an external rotor motor assembly. The output end of the motor shaft of the external rotor motor assembly is directly inserted into the hub of the fan blade assembly and connected to the fan blade assembly. The external rotor motor assembly is at least partially embedded in the internal cavity of the hub of the fan blade assembly, and the fan blade is at least partially located in the radial outer periphery of the external rotor motor assembly. The power module of the external rotor motor assembly drives the fan blade assembly to rotate.

[0027] This design not only tightly integrates the external rotor motor assembly and the fan assembly, making the hair dryer structure more compact and reducing vibration and noise, but also shortens the spatial distance occupied by the axial connection between the fan assembly and the external rotor motor assembly, thereby shortening the axial length of the hair dryer structure and further reducing vibration and noise during use. Furthermore, since the fan blades are at least partially located within the radial outer circumference of the external rotor motor assembly, it also helps to balance the torque distribution during fan blade rotation, further reducing vibration and noise caused by eccentric or cantilever structures. Moreover, the hair dryer provided by this application can achieve the effect of reducing vibration and noise without changing the hair dryer's blowing performance or adding vibration damping components, simply through structural improvements, thus improving the user experience. It not only simplifies the structure without adding vibration damping structures, but also effectively reduces the overall size and weight of the hair dryer. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the hair dryer provided in the embodiments of this application;

[0030] Figure 2 This is an exploded view of the hair dryer provided in an embodiment of this application;

[0031] Figure 3 A schematic diagram showing the overall internal structure and airflow direction of the hair dryer provided in the embodiments of this application;

[0032] Figure 4 A schematic diagram showing the partial internal structure and working state of a hair dryer provided in an embodiment of this application, along with a local airflow pattern.

[0033] Figure 5 This is a schematic diagram of the current collector provided in the embodiments of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the wind turbine assembly provided in the embodiments of this application;

[0035] Figure 7 This is a schematic diagram of the integrated wind turbine unit provided in the first embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the integrated wind turbine unit provided in the second embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the integrated fan unit provided in the third embodiment of this application.

[0038] Figure label:

[0039] 1000-Hair dryer;

[0040] 100-Integrated wind turbine unit;

[0041] 10-Wind blade assembly;

[0042] 11-Wind blade;

[0043] 12-Wheel hub;

[0044] 121 - Internal cavity;

[0045] 122 - Center Hole;

[0046] 123 - Rear End Face;

[0047] 1231 - Heat dissipation holes;

[0048] 13-Reinforcing ribs;

[0049] 20 - External rotor motor assembly;

[0050] 21-Motor shaft;

[0051] 221-Front snap ring;

[0052] 222-Rear snap ring;

[0053] 23-Stator core;

[0054] 231 - Stator winding;

[0055] 24-Rotor magnet;

[0056] 251 - First bearing;

[0057] 252 - Second bearing;

[0058] 261-Stator support;

[0059] 262-Front end cap;

[0060] 263-Rear end cover;

[0061] 264 - Rotor housing;

[0062] 200 - Casing;

[0063] 201-Holding section;

[0064] 202 - Switch button;

[0065] 2031 - First Half-Shell;

[0066] 2032 - Second half-shell;

[0067] 300-air duct;

[0068] 301 - Air outlet;

[0069] 400-ventilation duct;

[0070] 401 - External fixing sleeve;

[0071] 402 - Inner guide tube;

[0072] 4021 - First end face;

[0073] 4023 - First through hole;

[0074] 403 - First diversion channel;

[0075] 404-grid baffle;

[0076] 405 - Second heat dissipation channel;

[0077] 500-collector;

[0078] 501 - Motor mounting end;

[0079] 5011 - Second through hole;

[0080] 502-Blower Plate;

[0081] 503 - Current collector leading edge;

[0082] 504 - Pressure Ring;

[0083] 505 - Air Inlet;

[0084] 506 - Install the casing;

[0085] 5061 - Cable tray;

[0086] 600-battery pack;

[0087] 700-Standard;

[0088] 701 - Upper support;

[0089] 702 - Lower support. Detailed Implementation

[0090] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0091] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0092] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0093] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0094] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0095] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0096] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0097] like Figures 1 to 3 As shown, this application embodiment provides a blower 1000, including a housing 200, and a blower duct 300, a diffuser 400, and a collector 500 that are sequentially connected and communicate with each other along the axial direction, as well as an integrated fan unit 100 disposed within the housing 200 at the duct position. A duct refers to a channel through which gas flows, such as... Figure 5 As shown, a motor fixing end 501 can be provided at the duct position inside the collector 500, and the integrated fan unit 100 can be fixedly installed on the motor fixing end 501.

[0098] Furthermore, the diffuser 400 and the collector 500 are located inside the housing 200. The diffuser 400 is fixedly connected to the inner wall of the housing 200 through its outer fixing cylinder 401, and the collector 500 is fixedly connected to the inner wall of the housing 200 through its mounting housing 506. The side of the duct 300 away from the diffuser 400 is the air outlet 301, and the side of the collector 500 away from the diffuser 400 is the air inlet 505. The side of the duct 300 away from its air outlet 301 is connected to the connection port of the housing 200, which can be done by snap-fit ​​connection.

[0099] like Figures 7 to 9 As shown, the integrated fan unit 100 includes an integrally mounted fan blade assembly 10 and an external rotor motor assembly 20. For example... Figure 6 As shown, the fan assembly 10 may specifically include fan blades 11 and a hub 12. Multiple fan blades 11 may be uniformly and fixedly connected to the radial outer periphery of the hub 12. The specific number of fan blades 11 can be determined according to the radial size (i.e., diameter) of the hub 12 and actual needs. Preferably, the fan blades 11 are arc-shaped, and preferably, the thickness of the fan blades 11 gradually increases from both ends to the middle to further optimize airflow distribution and further reduce resistance and noise. The hub 12 has an internal cavity 121 recessed in the axial direction.

[0100] The external rotor motor assembly 20 is at least partially embedded in the internal cavity 121 of the hub 12 of the fan blade assembly 10, and the fan blade 11 of the fan blade assembly 10 is at least partially located on the radial outer periphery of the external rotor motor assembly 20. This helps to balance the torque distribution when the fan blade 11 rotates, thereby further reducing vibration and noise caused by eccentric or cantilever structures. The external rotor motor assembly 20 includes a power module and a motor shaft 21. The output end of the motor shaft 21 is inserted and connected to the hub 12. The external rotor motor assembly 20 drives the fan blade assembly 10 to rotate through its power module.

[0101] Compared with the prior art, the blower 10 and the external rotor motor assembly 20 in the blower 1000 provided in this application embodiment are integrated. The output end of the motor shaft 21 of the external rotor motor assembly 20 is directly inserted into the hub 12 of the blower assembly 10 and connected to the blower assembly 10. The external rotor motor assembly 20 is at least partially embedded in the internal cavity 121 of the hub 12 of the blower assembly 10, so that the blower 11 is at least partially located in the radial outer periphery of the external rotor motor assembly 20. The power module of the external rotor motor assembly 20 drives the blower assembly 10 to rotate.

[0102] This configuration not only tightly integrates the outer rotor motor assembly 20 with the fan blade assembly 10, making the hair dryer 1000 more compact and reducing vibration and noise, but also shortens the spatial distance occupied by the axial connection between the fan blade assembly 10 and the outer rotor motor assembly 20, thereby shortening the axial length of the hair dryer 1000 structure and further reducing vibration and noise during use. Furthermore, the fan blade 11 is at least partially located within the radial outer circumference of the outer rotor motor assembly 20, which also helps to balance the torque distribution when the fan blade 11 rotates, further reducing vibration and noise caused by eccentric or cantilever structures. Moreover, the hair dryer 1000 provided in this application embodiment can achieve the effect of reducing vibration and noise without changing the blowing performance of the hair dryer 1000 or adding vibration damping elements, simply through structural improvements, thus improving the user experience. It not only does not add vibration damping structures and simplifies the structure, but also effectively reduces the overall size and weight of the hair dryer 1000.

[0103] Preferably, the outer rotor motor assembly 20 and the fan blade assembly 10 are coaxially arranged. Specifically, the hub 12 of the fan blade assembly 10 may be provided with a central hole 122 extending along the central axis of the fan blade assembly 10. The output end of the motor shaft 21 of the outer rotor motor assembly 20 is inserted and fixedly connected to the central hole 122, and the central axis of the motor shaft 21 of the outer rotor motor assembly 20 coincides with the central axis of the outer rotor motor assembly 20, and the central axis of the outer rotor motor assembly 20 coincides with the central axis of the hub 12.

[0104] This configuration ensures that the center hole 122 of the fan blade assembly 10 and the motor shaft 21 of the outer rotor motor assembly 20 are precisely matched, ensuring that the rotation center of the fan blade 11 and the central axis of the motor shaft 21 are aligned, effectively avoiding vibration or noise caused by eccentricity and cantilever.

[0105] like Figures 7 to 9As shown, in one optional embodiment, retaining rings can be used to fix the fan blade assembly to the motor shaft 21, improving the stability of the fixed connection and preventing the fan blade assembly 10 from loosening during high-speed rotation. Specifically, retaining rings can be provided at both ends of the motor shaft 21, namely a front retaining ring 221 and a rear retaining ring 222. The front retaining ring 221 is used to fix to the front end of the stator bracket 261 of the outer rotor motor assembly 20, and the rear retaining ring 222 is used to fix to the rear end of the hub 12 of the fan blade assembly 10. Furthermore, reinforcing ribs 13 can also be provided inside the hub 12 of the fan blade assembly 10 to improve its connection strength.

[0106] Regarding the power module of the aforementioned external rotor motor assembly 20, a specific embodiment is as follows: Figures 7 to 9 As shown, the power module may specifically include a stator and a rotor. Specifically, the stator may include a stator core 23 and a stator winding 231, and the rotor may include rotor magnets 24 and a rotor housing 264. The rotor magnets 24 are fixedly mounted on the rotor housing 264. The motor shaft 21 of the outer rotor motor assembly 20 is sleeved with bearings, specifically two or more bearings spaced apart along the axial direction of the motor shaft 21. In this embodiment, two bearings are spaced apart, namely a first bearing 251 and a second bearing 252. The inner ring of the stator core 23 is sleeved with... The outer ring of the rotor magnet 24 is fixedly connected to the bearing (specifically, the second bearing 252). The inner ring of the rotor magnet 24 is located on the outer periphery of the stator core 23 and has a gap with the stator core 23. The outer ring of the rotor magnet 24 is fixedly connected to the circumferential inner wall of the internal cavity 121 of the hub 12 of the fan blade assembly 10. It can also be fixedly connected to the circumferential inner wall of the internal cavity 121 through the rotor housing 264. More specifically, the fan blade assembly 10 can be part of the outer rotor, that is, the rotor housing 264 and the fan blade assembly 10 are made into an integral structure.

[0107] When the external rotor motor assembly 20 is energized, the stator generates a rotating magnetic field, and the rotor begins to rotate under the action of the magnetic field, which drives the fan blade assembly 10 fixedly connected to it to rotate. The fan blades 11 and hub 12 of the fan blade assembly 10 rotate accordingly, and the motor shaft 21 of the external rotor motor assembly 20, which is inserted and fixedly connected in the hub 12, rotates accordingly. However, since the stator and the motor shaft 21 are fixedly connected by bearings, the stator remains fixed and does not rotate.

[0108] Unlike traditional motors where the motor shaft primarily drives rotation, in this embodiment, the motor shaft 21 mainly serves to support and fix the motor, as well as assist in driving the fan blade assembly 10 after it is started. The stator and rotor work together to drive the fan blade assembly 10 to rotate.

[0109] Furthermore, such as Figures 7 to 9As shown, the aforementioned external rotor motor assembly 20 may also include a stator bracket 261, which is fixedly connected to the first bearing 251 and the second bearing 252. The front end of the stator bracket 261 is exposed and used to be fixedly connected to the motor fixing end 501 of the collector 500 for fixed installation of the integrated fan unit 100.

[0110] One specific embodiment is, as follows: Figures 7 to 9 As shown, the external rotor motor assembly 20 may also include a rotor housing 264, a front end cover 262 and a rear end cover 263. One end of the external rotor motor assembly 20 is embedded in the internal cavity 121 of the hub 12 of the fan blade assembly 10 and is positioned by the rear end cover 263. The front end cover 262 and the front end of the stator bracket 261 are fixed to the front end of the external rotor motor assembly 20.

[0111] A preferred embodiment is, as follows: Figures 7 to 9 As shown, the fan blade 11 of the aforementioned fan blade assembly 10 is at least partially located on the radial outer periphery of the outer rotor motor assembly 20. That is, the radial projection area of ​​the fan blade 11 (i.e., the second radial projection area b) at least partially coincides with the radial projection area of ​​the portion of the outer rotor motor assembly 20 embedded in the fan blade assembly 10 (i.e., the first radial projection area a). The radial projection area of ​​the portion of the outer rotor motor assembly 20 embedded in the fan blade assembly 10 is defined as the first radial projection area a, the radial projection area of ​​the fan blade 11 is defined as the second radial projection area b, and the overlapping area of ​​the first radial projection area a and the second radial projection area b is defined as the overlapping area c. Preferably, the overlapping area c of the first radial projection area and the second radial projection area accounts for between 10% and 100% of the first radial projection area a.

[0112] This configuration not only helps to balance the torque distribution when the fan blade 11 rotates, further reducing vibration and noise caused by eccentric or cantilever structures; but also, because the radial projection areas of the fan blade 11 and the outer rotor motor assembly 20 overlap, on the one hand, airflow can directly enter the fan blade 11 area from around the outer rotor motor assembly 20, thereby reducing resistance, improving the airflow path, reducing airflow loss and turbulence inside, reducing energy loss, and improving efficiency; on the other hand, because the radial projection areas of the fan blade 11 and the outer rotor motor assembly 20 overlap, the mass distribution between the two is more uniform, thereby reducing unbalanced forces during rotation.

[0113] Specifically, this application provides three specific embodiments based on the different embedding positions of the external rotor motor assembly 20.

[0114] The first embodiment, such as Figure 7As shown, when the radial projection of the fan blade 11 is located in the middle of the radial projection of the part of the main body of the fan blade assembly 10 embedded in the outer rotor motor assembly 20, the second radial projection area b falls entirely within the first radial projection area a. That is, the overlapping area c of the two is the entire radial projection area of ​​the fan blade 11 (i.e., the second radial projection area b). In other words, the overlapping area c of the first and second radial projection areas accounts for 100% of the first radial projection area a. At this time, the outer rotor motor assembly 20 and the fan blade assembly 10 are more compactly integrated, the axial length of their connection is greatly shortened, and the balance torque distribution of the radial rotation of the fan blade 11 is optimal, resulting in the best reduction in vibration and noise.

[0115] The second embodiment, such as Figure 8 As shown, when the radial projection of the fan blade 11 is located at the rear section of the radial projection of the part of the main body of the fan blade assembly 10 embedded in the outer rotor motor assembly 20, the second radial projection area b partially falls within the first radial projection area a, and the overlapping area c of the two preferably accounts for 10% to 100% of the first radial projection area a, that is: 10% ≤ c / a ≤ 100%.

[0116] The third embodiment, such as Figure 9 As shown, when the radial projection of the fan blade 11 is located in front of the radial projection of the part of the main body of the fan blade assembly 10 embedded in the outer rotor motor assembly 20, the second radial projection area b falls within the first radial projection area a, and the overlapping area c of the two preferably accounts for 10% to 100% of the first radial projection area a, that is: 10% ≤ c / a ≤ 100%.

[0117] In a further embodiment, the embedding depth of the external rotor motor assembly 20 into the fan blade assembly 10 can be between 10 and 50 mm, preferably 25 mm. In this case, the radial projection of the fan blade 11 is located in the middle section of the radial projection of the part of the main body of the external rotor motor assembly 20 embedded in the fan blade assembly 10. Being located in the middle section, the entire radial projection area of ​​the fan blade 11 can be realized to fall within the radial projection area of ​​the part of the main body of the external rotor motor assembly 20 embedded in the fan blade assembly 10 (i.e., the first radial projection area a). At this time, the external rotor motor assembly 20 and the fan blade assembly 10 are tightly combined, the axial length of their connection is relatively short, and the balance torque distribution of the radial rotation of the fan blade 11 is best, which can achieve the best effect of reducing vibration and noise.

[0118] like Figures 2 to 5As shown, the aforementioned collector 500 includes a mounting housing 506, a guide plate 502 disposed within the mounting housing 506, a motor mounting end 501, a collector front edge 503 connected to the rear end edge of the mounting housing 506, and a pressure ring 504 disposed on the outer edge of the air inlet 505 of the collector front edge 503. The motor mounting end 501 is disposed axially on the collector 500, and a plurality of guide plates 502 are sequentially disposed on the radial outer periphery of the motor mounting end 501. The mounting housing 506 is used for fixed connection and installation with the inner wall of the housing 200 of the blower 1000. A wire groove 5061 can be opened on the mounting housing 506 for the power cord connected to the motor assembly to pass through. The pressure ring 504 is used to fix the air inlet side of the collector 500.

[0119] Preferably, the leading edge 503 of the collector is configured as a trumpet shape with a gradually narrowing diameter, and the diameter gradually narrows along the air inlet direction to directly and effectively increase the diameter of the air inlet 505. Furthermore, it is preferable that the inner diameter of the air inlet 505 is larger than the inner diameter of the air outlet 301.

[0120] This configuration serves two purposes. First, the larger diameter of the air inlet 505 ensures more air intake, while the gradually narrowing diameter of the collector front edge 503 along the air intake direction, along with the smaller diameter of the air outlet 301, concentrates this air, creating a high-speed, high-pressure airflow. As the airflow enters the blower 300 and gradually flows towards the smaller inner diameter of the air outlet 301, the airflow speed increases, resulting in a stronger blowing effect. This allows the blower 1000 to blow out more and stronger airflow per unit time, thereby improving blowing efficiency. Second, it reduces turbulence and noise, improving airflow stability. Conversely, if the inner diameters of the air inlet 505 and the air outlet 301 were the same or similar, turbulence might occur within the blower 300, leading to increased noise and affecting airflow stability during operation.

[0121] A preferred embodiment is, as follows: Figure 6 As shown, at least part of the rear end face 123 of the hub 12 of the integrated fan unit 100 away from its internal cavity 121 is an arc-shaped surface. Multiple heat dissipation holes 1231 are evenly arranged along the circumference of the arc-shaped surface. The arc-shaped surface helps to guide the airflow more smoothly to the fan blades, which is used to facilitate heat dissipation of the external rotor motor assembly 20. Preferably, the diameter of the heat dissipation hole is between 0.1 and 10 mm, and more preferably, the diameter of the heat dissipation hole is 4 mm.

[0122] like Figure 3 and Figure 4As shown, in a specific embodiment, the aforementioned air diffuser 400 may include an outer fixed cylinder 401 and an inner guide cylinder 402 sleeved inside the outer fixed cylinder 401. The air diffuser 400 is fixedly connected to the inner wall of the housing 200 through its outer fixed cylinder 401, and a first guide channel 403 is formed between the inner guide cylinder 402 and the outer fixed cylinder 401. The opposite sides of the first guide channel 403 are respectively connected to the guide plate 502 of the air duct 300 and the collector 500.

[0123] Furthermore, the inner guide tube 402 has a plurality of first through holes 4023 on its first end face 4021 near the air duct 300 along its axial direction. The circumferential side of the inner guide tube 402 opposite to its first end 4021 is connected to the outer periphery of the motor fixing end 501. The motor fixing end 501 has a plurality of second through holes 5011. The first through holes 4023, the second through holes 5011 and the heat dissipation holes 1231 on the rear end face 123 of the hub 12 of the integrated fan unit 100 are connected in sequence, so that the interior of the inner guide tube 402 and the integrated fan unit 100 fixedly connected to the motor fixing end 501 form a second heat dissipation channel 405, thereby improving the heat dissipation effect of the motor assembly.

[0124] With this configuration, during operation, power is input from the external rotor motor assembly 20, driving the fan assembly 10 to rotate and thus drawing in airflow from the air inlet 505. The airflow flows through the collector 500, the first guide channel 403 of the diffuser 400, the grille baffle 404, and the duct 300 before being blown out from the air outlet 301. Then, due to the pressure difference, some airflow inside the duct 300 flows back into the inner guide tube 402 through the first through hole 4023 on the first end face 4021 at the axial position of the inner guide tube 402, and then enters the external rotor motor assembly 20 through the second through hole 5011 of the motor fixed end 501, and is then blown out through the heat dissipation hole 1231 on the rear end face 123 of the hub 12. This further improves the heat dissipation effect of the external rotor motor assembly 20.

[0125] More preferably, the diameter of the motor fixed end 501 is larger than the diameter of the first end face 4021 of the inner guide tube 402, and the diameter of the first end face 4021 is smaller than the diameter of the outer fixed tube 401, so as to optimize the flow of air distribution and improve the blowing effect and heat dissipation effect.

[0126] In one optional embodiment, a grid baffle 404 is provided on the side of the aforementioned diffuser 400 near the air duct 300. The grid baffle 404 is located between the diffuser 400 and the air duct 300. The outer periphery of the grid baffle 404 is fixedly connected to the outer fixed cylinder 401, and the inner periphery of the grid baffle 404 is fixedly connected to the outer periphery of the inner guide cylinder 402. Firstly, it serves to rectify and guide the airflow direction, thereby increasing the concentration of the airflow, preventing airflow dispersion, reducing energy loss during airflow, and enhancing the blowing effect of the blower. Secondly, the grid baffle 404 is provided on the side of the air duct 300 away from the air outlet 301. This provides safety protection, preventing injury from a person reaching inside during operation.

[0127] One specific embodiment is, as follows: Figure 1 and Figure 2 As shown, the upper end of the housing 200 of the hair dryer 1000 provided in this application embodiment may be provided with a grip 201 for easy hand holding during operation; a switch button 202 may also be provided near the grip 201; the interior of the housing 200 is provided with a cavity for installing the battery pack 600, and preferably the fan blade assembly 10, the external rotor motor assembly 20 and the battery pack 600 are all located on the axis of the blower 300.

[0128] Furthermore, a bracket 700 can be provided at the bottom of the housing 200 to support and fix the hair dryer 1000. For ease of disassembly and installation, such as... Figure 2 As shown, the bracket 700 can be detachably and fixedly connected by an upper bracket 701 and a lower bracket 702 that can be interlocked and fixed together. Similarly, for easy disassembly and installation, the housing 200 can also be detachably connected by two separate first half-housing 2031 and second half-housing 2032.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hair dryer, characterized in that, The integrated fan unit (100) includes a housing (200) and an internal duct disposed within the housing (200), the integrated fan unit (100) comprising: A fan blade assembly (10) includes a fan blade (11) and a hub (12) fixedly connected to the fan blade (11) on its radial outer periphery, the hub (12) having an internal cavity (121) recessed in the axial direction; and An external rotor motor assembly (20) is at least partially embedded in the internal cavity (121) of the hub (12), such that the fan blade (11) is at least partially located on the radial outer periphery of the external rotor motor assembly (20). The external rotor motor assembly (20) includes a power module and a motor shaft (21). The output end of the motor shaft (21) is inserted into the hub (12). The external rotor motor assembly (20) drives the fan blade assembly (10) to rotate through its power module.

2. The hair dryer according to claim 1, characterized in that, The hub (12) is provided with a central hole (122) extending along its central axis. The output end of the motor shaft (21) of the external rotor motor assembly (20) is inserted and fixedly connected in the central hole (122), and the motor shaft (21) of the external rotor motor assembly (20) is arranged along its central axis direction, and the central axis direction of the external rotor motor assembly (20) coincides with the central axis direction of the hub (12).

3. The hair dryer according to claim 2, characterized in that, The radial projection area of ​​the fan blade (11) at least partially overlaps with the radial projection area of ​​a portion of the main body of the outer rotor motor assembly (20) embedded in the fan blade assembly (10); The radial projection area of ​​the part of the outer rotor motor assembly (20) embedded in the fan blade assembly (10) is the first radial projection area, and the radial projection area of ​​the fan blade (11) is the second radial projection area. The overlapping area of ​​the first radial projection area and the second radial projection area accounts for 10% to 100% of the first radial projection area.

4. The hair dryer according to claim 3, characterized in that, When the radial projection of the fan blade (11) is located in the middle of the radial projection of the portion of the main body of the outer rotor motor assembly (20) embedded in the fan blade assembly (10), the second radial projection area falls entirely within the first radial projection area; or When the radial projection of the fan blade (11) is located at the rear section of the radial projection of the portion of the main body of the outer rotor motor assembly (20) embedded in the fan blade assembly (10), the second radial projection area partially falls within the first radial projection area; or When the radial projection of the fan blade (11) is located in front of the radial projection of a portion of the main body of the fan blade assembly (10) into which the outer rotor motor assembly (20) is embedded, the second radial projection area partially falls within the first radial projection area.

5. The hair dryer according to claim 2, characterized in that, The power module includes a stator and a rotor. The motor shaft (21) is sleeved with a bearing. The inner ring of the stator is sleeved and fixedly connected to the outer ring of the bearing. The inner ring of the rotor is spaced at the outer periphery of the stator. The outer ring of the rotor is fixedly connected to the circumferential inner wall of the inner cavity (121) of the hub (12) of the fan blade assembly (10). The rotation of the rotor drives the fan blade assembly (10) to rotate.

6. The hair dryer according to claim 5, characterized in that, It also includes a duct (300), a diffuser (400) and a collector (500) that are connected and communicate with each other along the axial direction. The diffuser (400) and the collector (500) are located inside the housing (200). A motor fixing end (501) is provided in the duct position inside the collector (500). The integrated fan unit (100) is fixedly installed on the motor fixing end (501). The side of the duct (300) away from the diffuser (400) is the air outlet (301), and the side of the collector (500) away from the diffuser (400) is the air inlet (505).

7. The hair dryer according to claim 6, characterized in that, The collector (500) has a motor fixing end (501) on its axial direction, and a plurality of guide plates (502) are arranged in sequence on the radial outer periphery of the motor fixing end (501). The external rotor motor assembly (20) also includes a stator bracket (261), which is fixedly connected to the bearing. The front end of the stator bracket (261) is exposed and used to be fixedly connected to the motor fixed end (501).

8. The hair dryer according to claim 7, characterized in that, The diffuser duct (400) includes an outer fixed duct (401) and an inner guide duct (402) sleeved inside the outer fixed duct (401). A first guide channel (403) is formed between the inner guide duct (402) and the outer fixed duct (401). The opposite sides of the first guide channel (403) are respectively connected to the guide plate (502) of the air duct (300) and the collector (500).

9. The hair dryer according to claim 8, characterized in that, The hub (12) of the integrated fan unit (100) has at least a portion of an arc-shaped surface on its rear end face (123) away from its internal cavity (121), and a plurality of heat dissipation holes (1231) are evenly arranged along the circumference of the arc-shaped surface. The inner guide tube (402) has a plurality of first through holes (4023) on its first end face (4021) near the air duct (300) on its axial direction. The circumferential side of the inner guide tube (402) opposite to its first end face (4021) is connected to the outer periphery of the motor fixing end (501). The motor fixed end (501) is provided with a plurality of second through holes (5011), and the interior of the inner guide tube (402) and the integrated fan unit (100) fixedly connected to the motor fixed end (501) form a second heat dissipation channel (405).

10. The hair dryer according to claim 9, characterized in that, The diameter of the motor fixing end (501) is larger than the diameter of the first end face (4021), and the diameter of the first end face (4021) is smaller than the diameter of the outer fixing cylinder (401); and / or A grid baffle (404) is provided on the side of the air duct (300) near the air duct (300). The outer periphery of the grid baffle (404) is fixedly connected to the outer fixed cylinder (401), and the inner periphery of the grid baffle (404) is fixedly connected to the outer periphery of the inner guide cylinder (402).

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