Hair dryer

Abstract

The application provides a hair dryer, comprising: an air inlet cover provided with a plurality of cover holes through which air flows; an air duct part provided with an axial air inlet communicating with the outside, the axial air inlet communicating with the cover holes; an operating handle for a user to hold; an axial flow fan arranged in the air duct part; a motor for driving the axial flow fan to rotate to form an air flow; a battery pack mounting part for detachable combination with a battery pack for supplying power to the motor; the hair dryer further comprises a support extending in a longitudinal direction, the support having a first end and a second end opposite to each other in the longitudinal direction, the support connecting the operating handle through the second end, the air inlet cover comprising a first end connected with the axial air inlet, and the cross-sectional area of the first end of the air inlet cover in a direction perpendicular to the longitudinal direction being less than 13300mm 2 , and greater than or equal to 3800mm 2 .

Description

[0001] This application is a divisional application of the Chinese invention patent application filed by the applicant on December 8, 2020, entitled "Hair dryer" and with application number CN202011423026.9. Technical Field

[0002] This application relates to a power tool, specifically a hair dryer. Background Technology

[0003] Hair dryers, as a relatively common power tool, can be used to blow away fallen leaves, dust, puddles, snow, and even for forest fire fighting. A hair dryer generally includes: a housing, an operating handle formed on the housing, a motor housed within the housing, a fan driven by the motor, a duct at the front of the housing, a guide mechanism within the duct, and a blower tube connected to the front of the duct. The working principle is roughly as follows: the motor drives the fan to generate airflow, which is then guided by the guide mechanism and blown out through the opening at the front of the blower tube. The user operates the handle to aim the front of the blower tube at the target object (e.g., fallen leaves, dust, puddles, snow, flames, etc.), and the airflow is directed towards the target object.

[0004] Traditional hair dryers on the market typically have an air duct section where the air inlet is located at the rear of the hair dryer, with the handle and / or battery pack near the rear air inlet. Therefore, the length of the air duct section is roughly equal to the vertical length of the hair dryer. However, a longer air duct section increases air resistance as the fan flows through the duct, resulting in airflow loss. It also contributes to the machine's weight. To minimize airflow loss and achieve a lighter design, one solution is to shorten the length of the air duct, thus reducing its volume. However, this presents new challenges to user comfort and machine performance. Summary of the Invention

[0005] In order to solve the technical problems existing in the prior art, this application provides a hair dryer that can reduce the overall size of the hair dryer and improve the user experience.

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] A hair dryer includes: an operating handle for a user to hold;

[0008] The air inlet shroud has multiple protective holes for airflow.

[0009] The air duct section is provided with an axial air inlet that communicates with the outside. The air inlet cover is connected to the axial air inlet, and the axial air inlet is connected to the cover hole.

[0010] An axial fan is installed inside the air duct section;

[0011] An electric motor is used to drive the axial fan to rotate in order to generate airflow;

[0012] The hair dryer also includes a support member extending longitudinally, the support member having a first end and a second end that are opposite to each other in the longitudinal direction, the support member being connected to the air inlet shroud through the first end, and the support member being connected to the operating handle through the second end, the orthographic projection of the first end along the longitudinal extension direction of the support member onto the rotating surface formed by the rotation of the axial fan is always within the outer contour range of the rotating surface of the axial fan.

[0013] The hair dryer also includes a battery pack mounting portion for detachably engaging with a battery pack that powers the motor, the battery pack mounting portion being located at a second end near the support member;

[0014] In a direction perpendicular to the longitudinal direction, the cross-sectional area of ​​the air inlet shroud is less than 13300 mm². 2 The air inlet shroud is provided with a plug-in portion that extends a predetermined distance in the extending direction of the support member, and the shroud holes are circumferentially distributed around the plug-in portion.

[0015] The hair dryer also includes a first connecting structure, wherein the first end of the support member is locked to the insertion part of the air inlet cover through the first connecting structure; along the longitudinal extension direction of the support member, the orthographic projection of the first connecting structure on the plane where the rotating surface is located is substantially non-coincident with the orthographic projection of the cover hole on the plane where the rotating surface is located.

[0016] In one embodiment, the insertion portion is configured as an insertion channel, and the first connection structure includes a positioning hole disposed on the inner wall of the insertion channel and a positioning member disposed on the support member, wherein the positioning member has a locking state that engages with the inner wall of the positioning hole to restrict the support member from disengaging rearward from the insertion portion.

[0017] In one embodiment, in the locked state, the outer contour of the positioning member extends radially outward beyond the contour of the inner wall of the positioning hole.

[0018] In one embodiment, the positioning member further has a natural state in which it is inserted into the insertion portion while maintaining its shape, and in the natural state, the positioning member is in a preset position corresponding to the positioning hole;

[0019] Furthermore, the positioning element is configured to change its shape to be in the locked state when subjected to external forces.

[0020] In one embodiment, the first connection structure further includes a stop portion disposed at the end of the insertion portion, the stop portion being capable of abutting against the first end of the support member to prevent the support member from moving forward from the insertion channel.

[0021] In one embodiment, the air inlet shroud is configured to extend along the fan axis of the axial fan;

[0022] The projected area of ​​the air inlet shroud along the longitudinal direction on the plane where the rotating surface is located is S1;

[0023] The projected area S2 of the first end of the support member along the longitudinal direction falls on the plane where the rotating surface is located;

[0024] Where 6≤S1 / S2≤16.

[0025] In one embodiment, the air duct includes a main air duct and an auxiliary air duct connected to the main air duct. A gap can be formed between the main air duct and the auxiliary air duct to allow external airflow to enter the auxiliary air duct. The blower can switch between a first operating mode with relatively high wind speed and relatively low air volume and a second operating mode with relatively low wind speed and relatively high air volume through the auxiliary air duct.

[0026] The maximum speed of the motor is between 18,000 rpm and 35,000 rpm. The weight of the hair dryer when not connected to the battery pack does not exceed 1.5 kg. The maximum wind speed of the hair dryer in the first working mode is between 90 mph and 110 mph. The maximum air volume of the hair dryer in the second working mode is between 350 cfm and 500 cfm. The working time of the battery pack is not less than 6 minutes.

[0027] In one embodiment, the operating handle includes a switch element that is at least partially exposed for the user to turn the hair dryer on and off. In the longitudinal direction, the orthographic projection of the center of gravity of the hair dryer, which is coupled with the battery pack, onto a plane perpendicular to the rotation surface is G'. The orthographic projection of the foremost point of the switch element onto a plane perpendicular to the rotation surface is K'. The orthographic projection G' is configured to be within a range of 100mm forward and backward from the orthographic projection K'.

[0028] In one embodiment, the element connected to the first end of the support is defined as a first weight mechanism, and the element connected to the second end of the support is positioned as a second weight mechanism. The distance between the orthographic projection of the center of gravity of the first weight mechanism on a plane perpendicular to the rotation surface and the orthographic projection G' is L1, and the distance between the orthographic projection of the center of gravity of the second weight mechanism on a plane perpendicular to the rotation surface and the orthographic projection G' is L2. In the longitudinal direction, the longitudinal length of the first weight mechanism is between 420mm and 560mm, and the length of the support exposed to the outside is configured to be between 100mm and 140mm, with the distance L2 being 60% to 80% of the distance L1.

[0029] In one embodiment, the battery pack is adapted to connect to at least two different types of handheld tools, the number of battery packs is one, and the weight of the second weight mechanism is not greater than 140% and not less than 105% of the weight of the first weight mechanism.

[0030] In one embodiment, the air duct includes a main air duct and an auxiliary air duct connected to the main air duct. A gap can be formed between the main air duct and the auxiliary air duct to allow external airflow to enter the auxiliary air duct. The blower can switch between a first operating mode with relatively high wind speed and relatively low air volume and a second operating mode with relatively low wind speed and relatively high air volume through the auxiliary air duct.

[0031] The maximum speed of the motor is between 20,000 and 38,000 rpm, the weight of the hair dryer when not connected to the battery pack does not exceed 2 kg, the maximum wind speed of the hair dryer in the first working mode is between 110 mph and 180 mph, the maximum air volume of the hair dryer in the second working mode is between 420 cfm and 650 cfm, and the working time of the battery pack is not less than 6 minutes.

[0032] In one embodiment, the operating handle includes a switch element that is at least partially exposed for a user to turn the hair dryer on and off. The hair dryer also includes a first battery pack and a second battery pack that power the motor. In the longitudinal direction, the orthographic projection of the center of gravity of the hair dryer with the battery packs attached onto a plane perpendicular to the rotation surface is G'. The orthographic projection of the foremost point of the switch element onto a plane perpendicular to the rotation surface is K'. The orthographic projection G' is configured to be within a range of 70 mm from the orthographic projection K' forward to backward.

[0033] In one embodiment, the element connected to the first end of the support is defined as a first weight mechanism, and the element connected to the second end of the support is defined as a second weight mechanism. The distance between the orthographic projection of the center of gravity of the first weight mechanism on the plane perpendicular to the rotation surface and the orthographic projection G' is L1, and the distance between the orthographic projection of the center of gravity of the second weight mechanism on the plane perpendicular to the rotation surface and the orthographic projection G' is L2. The longitudinal length of the first weight mechanism is between 480 mm and 650 mm, and in the longitudinal extension direction of the support, the length of the support exposed to the outside is configured to be between 110 and 135 mm, with the distance L2 being 40% to 60% of the distance L1.

[0034] In one embodiment, the battery pack is adapted to connect to at least two different types of handheld tools, the nominal output voltage of the first battery pack and the second battery pack is greater than or equal to 20V and less than or equal to 40V, and the weight of the second weight mechanism is not greater than 250% of the weight of the first weight mechanism and not less than 150% of the weight of the first weight mechanism.

[0035] Beneficial effects:

[0036] The hair dryer provided in this embodiment is equipped with a support member, which connects the housing and the operating handle, allowing for separation of the housing and the operating handle. This not only reduces the size of the air hose but also maintains the efficiency of the airflow. Furthermore, the first end of the support member connects to the air inlet cover. When connected to the air inlet cover, the cover must maintain a sufficient air intake area to avoid affecting the performance of the hair dryer. The hair dryer in this embodiment is smaller in size and more convenient to use.

[0037] Specific embodiments of this application are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of this application can be adopted. It should be understood that the scope of the embodiments of this application is not limited thereto.

[0038] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0039] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the hair dryer provided in the embodiments of this specification;

[0042] Figure 2 A top view of the hair dryer provided in the embodiments of this specification;

[0043] Figure 3 for Figure 1 Cross-sectional view along the AA direction;

[0044] Figure 4 A schematic diagram of the original state of the first end of the support member provided in the embodiments of this specification;

[0045] Figure 5 A schematic diagram of the first end of the support member provided in the embodiment of this specification after deformation;

[0046] Figure 6 This is a schematic diagram of the structure after the support member and the air inlet shroud are connected, as provided in the embodiments of this specification.

[0047] Figure 7 This is a schematic diagram illustrating the center of gravity distribution of a hair dryer as provided in an embodiment of this specification.

[0048] Figure 8 This is a schematic diagram showing the center of gravity distribution of another hair dryer provided in the embodiments of this specification.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Air inlet shroud; 102. Positioning hole; 103. Insertion part; 104. Protective cover hole; 105. Stop part; 2. Housing; 21. Axial flow fan; 22. Motor; 23. Air duct part; 231. Axial air inlet; 24. Guide cone; 25. Main air blowing pipe; 251. Main air outlet; 26. Auxiliary air blowing pipe; 261. Gap; 3. Support component; 301. First end; 302. Second end; 303. Positioning component; 304. Connecting hole; 305. First surface; 306. Second surface; 307. Groove; 31. Auxiliary air duct; 4. Operating handle; 41. Positioning post; 42. Battery pack mounting part; 43. Switching element; G'. Projection of the center of gravity of the blower; K'. Projection of the switching element; M. Center of gravity position of the first weight mechanism; J. Center of gravity position of the second weight mechanism. Detailed Implementation

[0051] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art fall within the scope defined by this application.

[0052] It should be noted that when a component is referred to as being "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected" to another component, it can be a mechanical connection or an electrical connection; it can be directly connected to the other component or indirectly connected through an intermediate medium; it can be a connection within the two components. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. And, unless otherwise stated, in the description of this specification, "a plurality of" means two or more.

[0054] The following will combine Figures 1 to 8 The hairdryer according to embodiments of the present invention will be explained and described. It should be noted that, for ease of explanation, the same reference numerals denote the same components in the embodiments of the present invention. Furthermore, for brevity, detailed descriptions of the same components are omitted in different embodiments, and the descriptions of the same components can be mutually referenced and understood.

[0055] like Figure 1 and Figure 2 The diagram shown is a structural schematic of a hair dryer provided in an embodiment of this specification. The hair dryer includes: an operating handle for a user to hold; an air inlet cover 1 with multiple protective holes 104 for airflow; an air duct section 23; an axial fan 21 disposed in the air duct section 23; and a motor 22. The motor 22 is connected to the axial fan 21, and the motor 22 drives the axial fan 21 to rotate to generate airflow, which is then discharged through the air duct section 23.

[0056] The motor 22 can be any one of a DC motor, an AC motor, or a DC brushless motor. A battery pack (not shown) is installed on the hair dryer to provide power to the motor 22. In the hair dryer provided in the embodiments of this specification, the battery pack is installed on the operating handle 4 for the user to hold, and a switch element 43 is provided on the operating handle 4. This switch element 43 is electrically connected to the motor 22 and is used to control the motor 22 to turn on and off.

[0057] Motor 22 can be directly connected to axial fan 21 via its motor shaft to drive the axial fan 21 to rotate. Motor 22 can also be indirectly connected to axial fan 21; for example, a transmission mechanism can be provided between the motor shaft of motor 22 and axial fan 21, allowing motor 22 to indirectly drive axial fan 21 to rotate. The type of transmission mechanism is not particularly limited.

[0058] The hair dryer provided in this manual has a longitudinal extension direction and includes a housing 2, a motor 22, and working parts. The housing 2 includes an air duct section 23 extending generally longitudinally and an air inlet shroud 1 communicating with the air duct section 23. The working parts include an axial fan 21 disposed within the air duct section 23.

[0059] The air duct section 23 is specifically a hollow tubular body with an extending axis and two opposing ends along its extending direction. One end is an axial air inlet 231, which communicates with the protective hole 104 on the air inlet shroud 1. The other end is an air outlet, communicating with the outside. Figure 1 and Figure 2 As shown, the air duct section 23 includes a main air duct 25 extending generally longitudinally. The main air duct 25 can be one and only one; of course, the main air duct 25 can also be a combination of two or more duct sections forming a single air duct with complete air blowing function. For example... Figure 1 As shown, for ease of description, in this specification, the direction in which the airflow is directed from the duct section 23 is defined as "front", and the opposite direction is defined as "rear".

[0060] The main air duct 25 is installed at the front end of the housing 2. Compared to the rear end, when the user is standing and holding the operating handle 4, the air outlet of the main air duct 25 naturally faces the ground, meaning the air outlet is closer to the object being blew. This shortens the overall length of the air duct section 23. Consequently, the airflow resistance within the air duct section 23 is reduced, allowing the entire unit to have a smaller size.

[0061] To facilitate better airflow from the axial fan 21, the blower typically includes a duct within the air duct section 23, which may be located between the axial fan 21 and the main air duct 25. The duct may contain a flow guiding mechanism to direct the airflow towards the main air duct 25. This flow guiding mechanism may include a guide cone 24 and stationary blades. The guide cone 24 is positioned approximately along the airflow direction and at the center of the extended axis of the air duct section 23. Stationary blades are located between the guide cone 24 and the duct. The outer shell of the guide cone 24 and the duct form an airflow space. Multiple stationary blades are located within this space and are distributed approximately circumferentially, with the intervals between adjacent blades allowing for airflow.

[0062] The axial fan 21 includes a hub and blades arranged circumferentially around the hub. The blades of the axial fan 21 rotate about the fan axis to form a rotating surface. This rotating surface is perpendicular to the fan axis, and in this specification, it is perpendicular to the longitudinal extension direction of the support member 3.

[0063] like Figure 2 As shown, the support member 3 can generally be a longitudinally extending rod or tube. The support member 3 has a first end 301 and a second end 302 that are longitudinally opposite each other. The first end 301 and the second end 302 can be opposite ends along the longitudinal extension direction of the support member 3. The first end 301 can be the front end of the support member 3, and the second end 302 can be the rear end of the support member 3. The support member 3 can be connected to the air inlet shroud 1 via the first end 301, thereby connecting to the housing 2. The support member 3 is connected to the operating handle 4 via the second end 302.

[0064] like Figure 6 As shown, the air inlet shroud 1 is a cylindrical structure with open ends at both ends (i.e., the front and rear ends). The front end of the cylindrical structure is connected to the housing 2, and the rear end is connected to the support 3. The front end of the cylindrical structure and the housing 2 can be connected by bolts, or threads can be provided at the front end of the cylindrical structure, with a threaded connection on the housing 2. The two can be fixed together by threads, or fixed by fastening, screws, welding, etc. When the axial fan 21 is driven to rotate by the motor 22, a negative pressure zone can be formed in its upstream area. When external air enters the housing 2 through the air inlet shroud 1, due to the presence of the negative pressure zone, it flows along the air intake direction towards the axial fan 21, forming an airflow.

[0065] The air inlet shroud 1 has multiple protective holes 104 on its upper surface for airflow, used to introduce external airflow into the axial air inlet 231 of the air duct section 23. For example... Figure 1 and Figure 2 As shown, when the support member 3 is connected to the air inlet cover 1 via the first end 301, the projection of the first end 301 onto the rotating surface formed by the rotation of the axial fan 21 along the longitudinal extension direction of the support member is always within the outer contour range of the rotating surface of the axial fan 21. Since the axial fan 21 is installed inside the housing 2, the support member 3 will not be located outside the housing 2 in its longitudinal extension direction, making the overall shape of the hair dryer relatively regular, the structure simple, and easy to carry and operate.

[0066] Since the support member 3 is connected within the outer contour of the air inlet shroud 1, it inevitably occupies part of the air inlet area of ​​the air inlet shroud 1. This affects the air intake volume of the air inlet shroud 1 to a certain extent. The radial cross-sectional area of ​​the air intake channel formed between the air inlet shroud 1 and the support member 3 should be within a reasonable range to ensure the air intake volume of the blower while allowing the airflow to stably enter and flow through the fan area to form a high-speed, high-pressure airflow, effectively ensuring the performance of the blower. Specifically, in this embodiment, the air inlet shroud 1 is constructed to extend along the fan axis of the axial fan 21. The projected area of ​​the longitudinal orthographic projection of the air inlet shroud 1 onto the plane where the rotating surface is located is S1, and the projected area of ​​the longitudinal orthographic projection of the first end 301 of the support member 3 onto the plane where the rotating surface is located is S2, where 6≤S1 / S2≤16. Preferably, 8≤S1 / S2≤12.

[0067] To ensure the air intake requirement is met to the maximum extent possible, and to prevent the end face area of ​​the first end 301 of the support member 3 from being too large and affecting the air intake volume, in this embodiment, the cross-sectional area of ​​the first end 301 of the support member 3 in the vertical direction is no greater than 1256 mm². 2 Not less than 314mm 2 Preferably, the cross-sectional area of ​​the first end 301 of the support member 3 in the vertical direction is not greater than 920 mm. 2 Not less than 616mm 2 If the cross-sectional area is too large, it will inevitably affect the air intake and the overall weight reduction of the machine. If the cross-sectional area is too small, the reliability of the support component 3 will be poor because it needs to rely on the front and rear support components 3 to support the air duct and battery pack.

[0068] Furthermore, since hair dryers are primarily operated by hand, prolonged use can lead to arm fatigue, especially for handheld devices operated with one hand. Therefore, achieving substantial reductions in size and weight while maintaining roughly the same performance has always been a challenge. In this embodiment, a cleverly designed short air duct, combined with a reduced cross-sectional dimension of the air duct section 23, results in significant changes in both longitudinal and radial dimensions, leading to substantial changes in overall size and weight. The air inlet shroud 1 is connected to the axial air inlet 231 of the air duct section 23; therefore, the reduced cross-sectional dimension of the air duct section 23 inevitably leads to a reduction in the cross-sectional dimension of the air inlet shroud 1. Specifically, the air inlet shroud 1 includes a first end connected to the axial air inlet 231 and a second end opposite to the first end. In the vertical direction, the air inlet shroud 1 connected to the axial air inlet 231 affects the radial dimension of the entire device; the cross-sectional area of ​​the first end of the air inlet shroud 1 is less than 13300 mm². 2 Preferably, the cross-sectional area of ​​the first end of the air inlet shroud 1 in the vertical direction is not less than 3800 mm. 2 No more than 11300mm 2 .

[0069] Specifically, in one embodiment, the air inlet shroud 1 is approximately arc-shaped with a diameter of 110 mm, and the support member 3 has a radial cross-sectional area of ​​907 mm². 2 The ratio between the projected area S1 of the air inlet hood 1 along the longitudinal direction falling on the plane of the rotating surface and the projected area S2 of the projected area S2 of the end of the air inlet hood 1 connected to the support 3 along the longitudinal direction falling on the plane of the rotating surface is approximately 10.47.

[0070] For the layout of the "narrow" air duct, it is necessary to consider that the connection and fixing structure between the air inlet hood 1 and the support member 3 should not obstruct the air intake as much as possible, further reducing the loss of air intake volume. Specifically, in some embodiments, such as Figure 3 As shown, the air inlet shroud 1 has a plug-in portion 103 extending longitudinally by a predetermined distance, and the protective cover holes 104 are circumferentially distributed around the plug-in portion 103. The hair dryer also includes a first connecting structure, through which the first end 301 of the support member 3 is locked to the plug-in hole of the air inlet shroud 1. The orthographic projection of the first connecting structure along the extension direction of the support member 3 onto the plane of the axial flow fan 21 rotation surface is substantially non-coincident with the orthographic projection of the protective cover hole 104 along the extension direction of the support member 3 onto the plane of the rotation surface. Overall, when the first end of the support member 3 is assembled to the plug-in portion 103, the first connecting structure is located in the inner ring of the air inlet shroud 1, and the protective cover hole 104 is located in the outer ring of the air inlet shroud 1, and the two do not interfere with or obstruct each other. Therefore, when the air inlet shroud 1 is mated with the support member 3, the first connecting structure will not occupy the area of ​​the protective cover hole 104, thus not affecting the air intake volume.

[0071] It should be noted that the "basic non-overlap" here should include the maximum straight-line dimension within 5mm where the projection of the first connecting structure on the rotating surface is separate from, tangent to, or intersects with the projection of the shield hole 104. Furthermore, taking the screw-fixing method as an example—that is, the screw is inserted from the outer edge of the air inlet cover 1 and connected to the support member 3—the screw occupies a large radial dimension, obviously sacrificing some air inlet area, and the installation steps are more complex.

[0072] The insertion part 103 is constructed as a hollow insertion channel. The cross-section of the insertion channel along the direction perpendicular to the longitudinal extension direction of the support member 3 can be circular, elliptical, or square. The first end 301 of the support member 3 can extend into the insertion channel for a certain distance, thereby increasing the contact area between the support member 3 and the air inlet shroud 1 and improving the connection strength between the support member 3 and the air inlet shroud 1. Since the insertion channel has a certain extension length within the cylindrical structure, it can wrap around the support member 3 circumferentially, resulting in better connection strength and stability between the support member 3 and the air inlet shroud 1.

[0073] In some embodiments, the first connection structure includes a mating member disposed on the support member 3 and a locking member disposed on the insertion portion 103. The locking member may be defined as a positioning hole 102 on the inner wall of the insertion portion 103, and the mating member may be a shape-adjustable positioning member 303 disposed near the outer wall of the first end of the support member 3 or at the first end of the support member 3. The positioning member 303 has a locked state in which it engages with the inner wall of the positioning hole 102. In the locked state, the outer contour of the positioning member 303 extends radially outward beyond the outer contour of the inner wall of the positioning hole 102 to prevent the support member 3 from disengaging rearward from the insertion channel. Specifically, in some embodiments, the positioning member 303 has a natural state in which it is inserted into the insertion channel while maintaining its shape (see...). Figure 4 ), and the locked state that changes its shape when subjected to external forces (see Figure 6 In its natural state, the positioning member 303 is in a preset position corresponding to the positioning hole 102. In the locked state, the outer contour of the positioning member 303 extends radially beyond the outer contour of the inner wall of the positioning hole 102 to restrict the support member 3 from being dislodged from the insertion channel.

[0074] Specifically, the inner wall of the insertion part 103 is provided with a plurality of positioning holes 102, which are spaced apart in the circumferential direction of the insertion part 103. The positioning member 303 is adjustable in shape and can be a rigid structure or an elastic structure. In one specific embodiment, when the positioning member 22 is a rigid structure, such as an aluminum plate, switching from the natural state to the locked state requires the operator to use an auxiliary component to push the positioning member 303 outward, so that the positioning member 303 changes shape and expands outward. When the positioning member 303 is an elastic structure, switching from the natural state to the locked state, the positioning member 303 releases the accumulated elastic potential energy, so that the positioning member 303 changes shape and expands outward.

[0075] It should be emphasized that after the air inlet shroud 1 and the support member 3 are connected, the first connecting structure is entirely located inside the air inlet shroud 1. By accommodating the first connecting structure entirely within the air inlet shroud 1, the stability of the first connecting structure is ensured. When the support member 3 is engaged with the air inlet shroud 1, the positioning member 303 of the support member 3 changes from a natural state to a locked state in the positioning hole 102 to prevent the support member 3 from dislodging from the insertion channel.

[0076] In other embodiments, the mating part may also be defined as a groove recessed in the wall of the self-supporting member 3. The groove may be an opening that extends through the inside and outside or a semi-closed groove. The locking part may be defined as a protrusion that protrudes inward from the inner wall surface of the insertion part 103 or the end edge of the insertion part 103. The protrusion may be a snap fastener. When the insertion part 103 is inserted and coupled to the inner cavity of the support member 3, the air inlet cover and the support member 3 can form a locking engagement through the groove and the protrusion.

[0077] In some embodiments, the insertion portion 103 has an open end for inserting the support member 3. The open end can be necked inward to form a necked structure, and the maximum outer contour dimension of the open end is greater than the maximum outer contour dimension of the support member 3 at the positioning member 303. Specifically, when the first end of the support member 3 engages with the insertion portion 103, it can be easily inserted into the insertion portion 103 without requiring a large external force to insert the first end of the support member 3 into the insertion portion 103.

[0078] In this embodiment, after the air inlet shroud 1 and the support member 3 are connected, the first connecting structure is entirely located inside the air inlet shroud 1. By accommodating the first connecting structure entirely within the air inlet shroud 1, the stability of the first connecting structure is ensured. When the support member 3 is engaged with the air inlet shroud 1, the positioning member 303 of the support member 3 changes from a natural state to a locked state in the positioning hole 102 to prevent the support member 3 from dislodging from the insertion channel 103.

[0079] In some embodiments, the insertion channel 103 may have an open end for inserting the support member 3. The open end may be necked inward to form a necked structure, and the maximum outer contour dimension of the open end is greater than the maximum outer contour dimension of the support member 3 at the positioning member 303. Specifically, when the first end 301 of the support member 3 engages with the insertion channel 103, it can be easily inserted into the insertion channel 103 without requiring a large external force to insert the first end 301 of the support member 3 into the insertion channel 103.

[0080] In some embodiments, such as Figure 5 As shown, the first connecting structure also includes a stop portion 105 disposed at the end of the insertion channel 103. This stop portion 105 abuts against the end of the support member 3 to prevent the support member 3 from moving forward from the insertion channel 103. Specifically, the stop portion 105 is a stop step protruding into the insertion channel 103. When the positioning member 303 is in the locked state, the first end 301 of the support member 3 abuts against the stop step, and the first end 301 of the support member 3 is confined between the positioning hole 102 and the stop step to prevent the support member 3 from moving axially in the insertion channel 103. When the positioning member 303 of the support member 3 is engaged with the positioning hole 102, the first end 301 of the support member 3 can simultaneously abut against the stop step, achieving axial positioning.

[0081] In some embodiments, such as Figure 4 and Figure 5 As shown, the support member 3 has a slot 307 on its outer wall near the first end 301. The positioning member 303 is formed between the slot 307 and the end edge of the first end 301. The distance between the slot 307 and the end edge of the first end 301 is configured to be equal to the distance between the positioning hole and the stop step. In this embodiment, the positioning member 303 can be formed on the support member 3 by stamping, which is a simple manufacturing method and does not require the use of other materials, thus reducing costs.

[0082] In some embodiments, the support member 3 has a side surface surrounding the first end 301 and the second end 302. The side surface includes a first surface 305 and a second surface 306, which can be planes. A slot 307 is disposed on the first surface 305 and the second surface 306. In this embodiment, there can be two positioning members 303. The plane can be an approximately smooth surface with no significant undulations from a microscopic perspective. By providing a plane structure on the support member 3, it is beneficial to manufacture the slot 307. In addition, by providing a plane structure on the support member 3, the rotation of the support member 3 in the circumferential direction can be restricted to ensure a stable connection between the support member 3 and the air inlet shroud 1. The first surface 305 and the second surface 306 can be two opposing surfaces.

[0083] The support member 3 not only connects the operating handle 4 and the housing 2, but also provides support. Therefore, the support material of the support member 3 needs to have a certain strength. In some preferred embodiments, the support member 3 is made of aluminum tubing, which not only has a certain supporting strength, but also makes the support member lighter and more portable. Preferably, the wall thickness of the support member 3 is 1~2mm, which has a small volume and helps to reduce the wind resistance in the auxiliary air duct 31.

[0084] The length of the support member 3 is configured such that when the user holds the hair dryer in a standing position, the lower end of the air duct is close to the ground. The length range of the support member 3 allows for selection of a suitable length based on the user's height. In some embodiments, the length of the support member 3 configured on a single hair dryer may be fixed, but the length of the support member 3 configured on different hair dryers may differ. This allows users to select or purchase a hair dryer model that suits their height. Alternatively, in other embodiments, a hair dryer may be configured with at least two support members 3 of different lengths to meet the usage needs of users of different heights. In some other feasible embodiments, the support member 3 may be designed as an adjustable telescopic rod, allowing users of different heights to adjust the length of the support member 3 to suit their own height.

[0085] like Figure 1 and Figure 5As shown, the second end 302 of the support member 3 is fixedly connected to the operating handle 4. The operating handle 4 is provided with a second connecting structure, and the support member 3 is connected to the operating handle 4 through the second connecting structure. In some embodiments, the second connecting structure includes a connecting hole 304 provided on the second end 302 of the support member 3 and a positioning post 41 provided on the operating handle 4. The second end 302 of the support member 3 and the operating handle 4 are fixed through the cooperation of the connecting hole 304 and the positioning post 41. The support member 3 and the operating handle 4 can also be fixedly connected by other suitable means, including detachable connections such as threaded connections, snap-fit ​​connections, screw connections, riveting, and interference fit connections, and may also include fixed connections such as welding and bonding. This embodiment does not limit this.

[0086] The operating handle 4 is equipped with a battery pack mounting part 42 for detachable engagement with a battery pack that powers the motor 22. In some embodiments, the battery pack mounting part 42 is located near the second end 302 of the support member 3, and the insertion direction of the battery pack is perpendicular to or forms an acute angle with the extending direction of the support member 3. Figure 1 As shown in the diagram, the battery pack mounting part 42 is installed towards the rear end of the hair dryer. On the one hand, this helps to reduce the size of the hair dryer in the direction perpendicular to its longitudinal extension, and also reduces the size in the height direction of the entire machine, making the overall structure more compact. On the other hand, it facilitates the installation and removal of the battery pack. When it is necessary to remove or replace the battery pack, there is no need to flip the entire machine over; it can be replaced directly at the rear end of the hair dryer, resulting in a better user experience.

[0087] On the one hand, because the first end 301 of the support member 3 occupies the effective ventilation area of ​​the air inlet hood 1, the air inlet hood 1 sacrifices a portion of its air intake area. On the other hand, due to the layout of the "narrow" air duct, the air intake volume of the blower will inevitably be significantly affected. To compensate for the losses caused by the above structural design, the support member 3 can be used to deliver auxiliary airflow. Specifically, such as... Figure 1 As shown, the support member 3 can be roughly in the form of a hollow tubular structure, having an auxiliary air duct 31, an airflow inlet connected to the auxiliary air duct 31, and an airflow outlet. The airflow outlet is connected to the air duct section 23, and the airflow inlet is connected to the external airflow, forming an auxiliary airflow through the auxiliary air duct 31. This auxiliary airflow converges with the main airflow entering through the shroud hole 104 at the axial fan 21.

[0088] In some embodiments, the airflow outlet may be located near the first end 301, for example, at the lower part of the first end 301 or at the end of the first end 301, i.e., the first end 301 is open, for connecting the auxiliary air duct 31 and the housing 2, so that the airflow in the auxiliary air duct 31 can enter the housing 2 through the airflow outlet. The airflow inlet may be located near the second end 302 and on the outer part of the support 3 placed on the operating handle 4, or the airflow inlet may be located near the second end 302 and on the inner part of the support 3 placed on the operating handle 4, or the airflow inlet may be located at the end of the second end 302. In this embodiment, when the airflow inlet is located at the end of the second end 302 or on the support 3 placed on the inner part of the operating handle 4, in order to introduce external airflow into the auxiliary air duct 31 of the support 3, a secondary air inlet connected to the airflow inlet may be provided on the operating handle 4, the secondary air inlet being used to connect the external airflow and the auxiliary air duct 31. When the motor 22 is running, it generates a negative pressure zone near the first end of the support member 3, thereby drawing outside air into the auxiliary air duct 31 of the support member 3 through the airflow inlet, forming an auxiliary airflow within the support member 3. Figure 1 As indicated by the middle arrow, the air drawn into the auxiliary air duct 31 is further accelerated and enters the casing 2 through the airflow outlet.

[0089] like Figure 1 As shown, once the auxiliary airflow enters the housing 2, it flows forward under the combined action of the axial fan 21 driven by the motor 22, converging with the main airflow entering from the air inlet shroud 1 at the axial fan 21. After these two airflows converge, they are blown by the fan 21 towards the air outlet of the main air duct 25, thereby increasing the final airflow force. Therefore, using the support member 3 to deliver the auxiliary airflow serves two purposes: firstly, it supplements the airflow and enhances the airflow force; secondly, the auxiliary airflow delivered from the support member 3 can be concentrated and flow through the motor 22 without dispersion, thus providing better cooling for the motor 22.

[0090] In this specification, the auxiliary air duct 31 and the internal channel of the motor 22 are connected to form a motor cooling channel. Therefore, as long as the motor 22 is running, auxiliary airflow will continuously circulate in the motor cooling channel, performing uninterrupted air cooling operation on the motor 22. Furthermore, to minimize the entry of foreign objects from the secondary air inlet, a corresponding structure to block foreign objects can be installed at the secondary air inlet. For example, a filter screen can be installed at the secondary air inlet.

[0091] Furthermore, in some embodiments, to compensate for the air intake volume, the air duct section 23 includes a main air duct 25 and an auxiliary air duct 26 connected to the main air duct 25. A gap 261 can be formed between the main air duct 25 and the auxiliary air duct 26 to allow external airflow to enter the main air duct 25. The blower can switch between a first operating mode with relatively high wind speed and relatively low air volume and a second operating mode with relatively low wind speed and relatively high air volume through the auxiliary air duct 26.

[0092] Specifically, one end of the main air blower 25 forms a main air outlet 251, and the other end of the main air blower 25 is connected to the protective hole 104 of the air inlet shroud 1. The auxiliary air blower 26 has an auxiliary air inlet connected to the main air outlet 251 and a pipe opening located at the front end of the auxiliary air inlet, which forms the aforementioned air outlet. A gap 261 exists between the main air outlet 251 and the auxiliary air inlet, allowing external airflow to enter the auxiliary air blower 26 through the gap 261. The blower has a first operating mode in which external air enters through the protective hole 104 and is blown outward from the main air outlet 251, and a second operating mode in which external air enters through the protective hole 104 and is blown outward from the pipe opening of the auxiliary air blower 26. The blower can selectively operate in either the first or the second operating mode.

[0093] Furthermore, the auxiliary air blower 26 is movably connected to the main air blower 25. This movable connection means that the auxiliary air blower 26 can be detached from the main air blower 25, or that the auxiliary air blower 26 can be retracted a preset distance. Users can freely choose the appropriate mode to work according to their cleaning needs.

[0094] Furthermore, such as Figure 7 , 8As shown, the operating handle 4 includes a switch element 43 that is at least partially exposed for the user to operate and control the hair dryer's on / off state. When the user holds the hair dryer, the entire hair dryer forms a lever structure with the user's grip as the fulcrum. The two ends of the lever structure are the battery pack and the motor housing containing the air inlet shroud 1 and the air duct section 23, respectively. The user's grip is located near the switch element 43, which can be considered the fulcrum of the lever structure. For handheld hair dryers, users always prefer that the weight units be concentrated in the grip area to improve grip comfort. In traditional hair dryers, the motor, battery pack, and other weight units are generally located near the grip, so their center of gravity does not require special consideration. Regarding the layout of the "short" air duct and the front-positioned air duct (the air duct is far from the operating handle), on the one hand, the core components of the air duct section 23 are all positioned forward and far from the grip; on the other hand, due to the relatively long length of the support member 3, coupled with the considerable length of the air inlet cover 1 and the air duct section 23, the distance between the center of gravity of the core and the switch element 43 is relatively large; the distance (lever arm) between the battery pack and the switch element 43 is relatively small; therefore, the center of gravity will inevitably shift relatively forward.

[0095] In some embodiments, such as Figure 7 As shown, the battery pack mounting part 42 is located at the second end 302 near the support member 3. The number of battery packs supplying power to the motor 22 can be one. The nominal output voltage of the battery pack is less than or equal to 20V, the battery pack capacity is 2–9Ah, and the maximum speed of the motor 22 is between 18,000 rpm and 35,000 rpm. The weight of the hair dryer without the battery pack connected does not exceed 1.8 kg. The maximum airflow of the hair dryer in the first working mode is between 90 mph and 110 mph, and the maximum airflow in the second working mode is between 350 cfm and 500 cfm. The battery pack's operating time is not less than 6 minutes. Specifically, the nominal output voltage of a single battery pack is 20V, the battery pack capacity is 4Ah, the maximum speed of the motor 22 is between 20,000 rpm and 30,000 rpm, and the weight of the hair dryer without the battery pack connected does not exceed 1.5 kg. The maximum airflow speed of this hair dryer is between 90 mph and 100 mph in the first working mode, and between 380 cfm and 480 cfm in the second working mode. The battery pack has a working time of no less than 10 minutes.

[0096] Furthermore, such as Figure 7As shown, in the longitudinal extension direction of the support member 3, the orthographic projection of the center of gravity of the hair dryer with the battery pack attached onto a plane perpendicular to the rotation surface of the axial fan 21 is G'. The orthographic projection of the front end of the switching element 43 near the support member 3 onto a plane perpendicular to the rotation surface of the axial fan 21 is K'. The orthographic projection G' is configured within a range of 100mm forward and backward from the orthographic projection K'. Preferably, the weight of the hair dryer without the battery pack attached does not exceed 1.5kg, and the projection G' is configured within a range of 50mm forward and backward from the projection K'. By installing the battery pack on the rear side of the entire machine, the position of the hair dryer's center of gravity G' is balanced (here, the center of gravity G' is understood as the projection of the center of gravity of the entire machine with the battery pack attached). Furthermore, since the hair dryer itself is relatively lightweight in this embodiment, the fatigue of the user holding the machine is greatly reduced in terms of weight.

[0097] Furthermore, to bring the center of gravity of the entire machine as close as possible to the operating handle 4, the weight of the mechanism is reduced to improve the overall operating comfort, and the length of the support member 3 is shortened, thus reducing the lever arm between the mechanism and the switching element 43. However, if the exposed length of the support member 3 is too short, the overall length of the air duct connected to the first end 301 of the support member 3 will inevitably be longer. Increasing the length of the air duct will affect the miniaturization of the entire machine. In addition, the longer the air duct, the greater the airflow loss, which will affect the overall performance of the machine.

[0098] Furthermore, such as Figure 7 As shown, the element connected to the first end 301 of the support member 3 is defined as the first weight mechanism, and the element connected to the second end 302 of the support member 3 is positioned as the second weight mechanism. The distance between the projection of the center of gravity of the first weight mechanism onto the plane perpendicular to the rotation surface of the axial fan 21 and its projection G' is L1. The distance between the projection of the center of gravity of the second weight mechanism onto the plane perpendicular to the rotation surface of the axial fan 21 and its projection G' is L2. In the longitudinal extension direction of the support member 3, the length of the support member 3 exposed to the outside is configured within the range of 100-140mm, where distance L2 is 60% to 80% of distance L1. The longitudinal length of the first weight mechanism is between 420mm and 560mm. Here, distances L1 and L2 are the distances between the orthographic projections of the blower onto the plane perpendicular to the rotation surface when the blower is in a flat position.

[0099] Specifically, the first weight mechanism includes an air inlet shroud 1, a motor 22, and a housing 2 (including an air duct section 23 and an axial fan 21); the second weight mechanism includes an operating handle 4 and a battery pack. The length of the support member 3 exposed to the outside is the length of the support member 3 minus the length of the portion connected to the air inlet shroud 1 and the operating handle 4. Thus, the overall length of the air duct connected to the first end 301 of the support member 3 is shorter. This reduces the flow resistance of the airflow in the air duct section 23, allowing for a shorter maximum radial dimension of the air duct section 23. With both the length and maximum radial dimension of the air duct section 23 shortened, the volume of the air duct section 23 is significantly reduced, achieving overall miniaturization of the device.

[0100] In this embodiment, the battery pack can be adapted to connect to at least two different types of handheld tools, such as lawn mowers, chainsaws, lawn trimmers, hair dryers, blow dryers, drills, chainsaws, pruning machines, pressure washers, and other battery-powered handheld tools. The weight of the second weight mechanism is not greater than 140% and not less than 105% of the weight of the first weight mechanism. For example, after miniaturization of the entire machine, the weight of the first weight mechanism is approximately 0.7 kg, and the weight of the second weight mechanism is approximately 0.94 kg.

[0101] In other embodiments, such as Figure 8 As shown, the hair dryer also includes a first battery pack and a second battery pack to power the motor 22. The nominal output voltage of both the first and second battery packs is greater than or equal to 20V and less than 56V. The battery pack capacity is between 2 and 9Ah. The weight of the hair dryer without the battery packs connected does not exceed 2kg. The maximum speed of the motor 22 is between 20,000rpm and 38,000rpm. In the first working mode, the maximum airflow of the hair dryer is between 110mph and 180mph. In the second working mode, the maximum airflow is between 420cfm and 650cfm. The battery pack's operating time is not less than 6 minutes, preferably not less than 8 minutes. Specifically, the nominal output voltage of both the first and second battery packs is 20V, the battery pack capacity is 4Ah, the weight of the hair dryer without the battery packs connected does not exceed 1.8kg, and the maximum speed of the motor 22 is between 20,000rpm and 38,000rpm. The maximum airflow of this hair dryer is between 130 mph and 165 mph in the first working mode and between 480 cfm and 630 cfm in the second working mode. The battery pack has a working time of no less than 10 minutes.

[0102] In the longitudinal extension direction of the support member 3, the orthographic projection of the center of gravity of the hair dryer with the battery pack attached onto a plane perpendicular to the rotation surface of the axial fan 21 is G'. The orthographic projection of the front end of the switching element 43 near the support member 3 onto a plane perpendicular to the rotation surface of the axial fan 21 is K'. The orthographic projection G' is configured within a range of 70mm forward and backward from the orthographic projection K'. Preferably, the orthographic projection G' is configured within a range of 50mm forward and backward from the orthographic projection K'. The orthographic projection G' of the center of gravity of the entire machine onto a plane perpendicular to the rotation surface of the axial fan 21 is located 35mm forward of the orthographic projection K'. By mounting the battery pack on the rear side of the entire machine, the position of the hair dryer's center of gravity G' is balanced (here, the center of gravity G' is understood as the projection of the center of gravity of the entire machine with the battery pack attached). Furthermore, since the hair dryer itself is relatively lightweight in this embodiment, the fatigue of the user holding the machine is greatly reduced in terms of weight.

[0103] like Figure 8 As shown, the element connected to the first end 301 of the support member 3 is defined as the first weight mechanism, and the element connected to the second end 302 of the support member 3 is defined as the second weight mechanism. The distance between the orthographic projection of the center of gravity of the first weight mechanism on the plane perpendicular to the rotation surface of the axial fan 21 and the orthographic projection G' is L1. The distance between the orthographic projection of the center of gravity of the second weight mechanism on the plane perpendicular to the rotation surface of the axial fan 21 and the orthographic projection G' is L2. In the longitudinal extension direction of the support member 3, the length of the support member 3 exposed to the outside is configured to be in the range of 110~135mm, within the range of 40% to 60% of the distance L1. The longitudinal length of the first weight mechanism is between 480mm and 650mm.

[0104] Specifically, the first weight mechanism includes an air inlet shroud 1, a motor 22, and a housing 2 (including an air duct section 23 and an axial fan 21); the second weight mechanism includes an operating handle 4 and a battery pack. The length of the support member 3 exposed to the outside is the length of the support member 3 minus the length of the portion connected to the air inlet shroud 1 and the operating handle 4. Thus, the overall length of the air duct connected to the first end 301 of the support member 3 is shorter. This reduces the flow resistance of the airflow in the air duct section 23, allowing for a shorter maximum radial dimension of the air duct section 23. With both the length and maximum radial dimension of the air duct section 23 shortened, the volume of the air duct section 23 is significantly reduced, achieving overall miniaturization of the device.

[0105] In this embodiment, the battery pack can be adapted to connect to at least two different types of handheld tools, such as lawn mowers, chainsaws, lawn trimmers, hair dryers, blow dryers, drills, chainsaws, pruning machines, pressure washers, and other battery-powered handheld tools. The weight of the second weight mechanism is not greater than 250% and not less than 150% of the weight of the first weight mechanism. For example, after miniaturization of the entire machine, the weight of the first weight mechanism is 0.88 kg, and the weight of the second weight mechanism is 1.960 kg.

[0106] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be construed as limiting the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

[0107] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.

[0108] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.

[0109] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference.

Claims

1. A hair dryer, comprising: The air inlet shroud has multiple protective holes for airflow. The air duct section is provided with an axial air inlet that communicates with the outside, and the axial air inlet is connected to the protective cover hole; Operating handle for the user to grip; An axial fan is installed inside the air duct section; An electric motor is used to drive the axial fan to rotate in order to generate airflow; A battery pack mounting section for detachable engagement with a battery pack that powers the motor; The hair dryer is characterized in that it further includes a support member extending longitudinally, the support member having a first end and a second end opposite to each other in the longitudinal direction, the support member being connected to the operating handle via the second end, and the air inlet shroud including a first end connected to the axial air inlet, wherein the cross-sectional area of ​​the first end of the air inlet shroud is less than 13300 mm² in a direction perpendicular to the longitudinal direction. 2 ≥3800mm 2 .

2. The hair dryer according to claim 1, characterized in that, The support member is connected to the air inlet shroud through the first end. The orthographic projection of the first end of the support member onto the rotating surface formed by the rotation of the axial fan along the longitudinal extension direction of the support member is always within the outer contour range of the rotating surface of the axial fan.

3. The hair dryer according to claim 2, characterized in that, The cross-sectional area of ​​the first end of the support member in the direction perpendicular to the longitudinal direction is no greater than 1256 mm. 2 Not less than 314mm 2 .

4. The hair dryer according to claim 2, characterized in that, The air inlet shroud is provided with a connector that extends a predetermined distance in the extending direction of the support member; The hair dryer also includes a first connecting structure, through which the first end of the support member is connected to the plug-in part. After the air inlet cover and the support member are connected, the first connecting structure is located inside the air inlet cover.

5. The hair dryer according to claim 4, characterized in that, The first connection structure includes a locking member disposed on the plug-in portion and a mating member disposed on the support member, wherein the mating member has a locking state that engages with the locking member to restrict the support member from disengaging rearward from the plug-in portion.

6. The hair dryer according to claim 5, characterized in that, The plug portion is configured as a plug channel, and the first connection structure further includes a stop portion disposed at the end of the plug portion, the stop portion being able to abut against the first end of the support member to prevent the support member from moving forward from the plug channel.

7. The hair dryer according to claim 5, characterized in that, The mating member has a natural state in which it retains its shape and is inserted into the plug, and a locked state in which it can change its shape when subjected to external forces; in the locked state, the outer contour of the mating member extends radially outward beyond the contour of the inner wall surface of the locking member, and forms a snap-fit ​​with the locking member.

8. The hair dryer according to claim 1, characterized in that, The air duct includes a main air duct and an auxiliary air duct connected to the main air duct. A gap can be formed between the main air duct and the auxiliary air duct to allow external airflow to enter the auxiliary air duct. The blower can switch between a first working mode of discharging air with a relatively high wind speed and a relatively low air volume and a second working mode of discharging air with a relatively low wind speed and a relatively high air volume through the auxiliary air duct. The maximum speed of the motor is between 20,000 and 38,000 rpm, the weight of the hair dryer without the battery pack does not exceed 2 kg, the maximum wind speed of the hair dryer in the first working mode is between 110 mph and 180 mph, and the maximum air volume of the hair dryer in the second working mode is between 420 cfm and 650 cfm.

9. The hair dryer according to claim 1, characterized in that, The operating handle includes a switch element for the user to turn the hair dryer on and off. In the longitudinal direction, the orthographic projection of the center of gravity of the hair dryer, which is coupled with the battery pack, onto a plane perpendicular to the rotation surface is G'. The element connected to the first end of the support member is defined as a first weight mechanism, and the element connected to the second end of the support member is positioned as a second weight mechanism. The distance between the orthographic projection of the center of gravity of the first weight mechanism onto the plane perpendicular to the rotation surface and the orthographic projection G' is L1, and the distance between the orthographic projection of the center of gravity of the second weight mechanism onto the plane perpendicular to the rotation surface and the orthographic projection G' is L2. In the longitudinal direction, the longitudinal length of the first weight mechanism is between 420mm and 560mm, and the length of the support member exposed to the outside is configured to be between 100mm and 140mm, with the distance L2 being 60% to 80% of the distance L1.

10. The hair dryer according to claim 1, characterized in that, The operating handle includes a switch element for the user to turn the hair dryer on and off. In the longitudinal direction, the orthographic projection of the center of gravity of the hair dryer, which is coupled with the battery pack, onto a plane perpendicular to the rotation surface is G'. The orthographic projection of the foremost point of the switch element onto a plane perpendicular to the rotation surface is K'. The orthographic projection G' is configured to be within a range of 100mm forward and backward from the orthographic projection K'.

Images