Air outlet structure of a handheld device and the handheld device

Abstract

The present application discloses an air outlet structure of a handheld appliance and a handheld appliance. The air outlet structure of the handheld appliance includes an inner barrel wall, an outer barrel wall disposed around the periphery of the inner barrel wall, and a plurality of partition ribs spaced apart in the axial direction of the inner barrel wall; an annular air outlet duct is formed between the inner barrel wall and the outer barrel wall; the plurality of partition ribs are connected to the ends of the inner barrel wall and the outer barrel wall in the air outlet direction of the annular air outlet duct, so that a plurality of air outlets spaced apart around the axis of the inner barrel wall are formed at the air outlet end of the annular air outlet duct; the air outlet areas and / or cross-sectional shapes of at least two air outlets are different; and / or, the widths of the end faces of at least two partition ribs in the air outlet direction in the circumferential direction around the axis of the inner barrel wall are not equal. The air outlet structure of the handheld appliance according to the present invention can reduce the noise generated at the air outlets of the air outlet structure.

Description

Technical Field

[0001] The present application relates to the technical field of hand-held small household appliances, and particularly relates to an air outlet structure of a hand-held appliance and a hand-held appliance, such as a hair dryer. Background Art

[0002] A common hand-held air outlet appliance is an electric hair dryer. Currently, the high-speed hair dryer that is widely favored by users in the market achieves a high-speed airflow by setting a high-speed motor inside the air duct. In order to increase the air outlet airflow speed, the current high-speed hair dryer usually adopts an annular air outlet. However, during use, the airflow blows out from the annular air outlet. Due to the wall attachment effect, a steady annular turbulence will be generated in the middle area of the annular airflow as the airflow flows, and thus the hair dryer will generate noise during use. To address this problem, related technologies, such as Chinese Patent CN210383012U, set a grille at the annular air outlet to divide the annular air outlet into multiple arc-shaped strip air outlets, so as to avoid the airflow blown out from the air outlet forming a steady annular eddy current, and thus eliminate the noise generated by the steady turbulence. Although this method can eliminate the noise generated by the steady turbulence to a certain extent, since the multiple arc-shaped strip air outlets are equally divided and evenly spaced in the circumferential direction, resonance will occur between each airflow blown out from the multiple arc-shaped strip air outlets, and thus the hair dryer will generate a buzzing sound during use, reducing the user experience.

[0003] The above content is only used to assist in understanding the technical solution of the invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] In view of the above problems, the present invention proposes an air outlet structure of a hand-held appliance, aiming to solve the technical problem of noise generated at the air outlet during the use of the hand-held appliance.

[0005] To achieve the above object, the air outlet structure of the hand-held appliance proposed by the present invention includes an inner barrel wall, an outer barrel wall disposed around the periphery of the inner barrel wall, and a plurality of partition ribs spaced apart in the axial direction of the inner barrel wall;

[0006] An annular air outlet duct is formed between the inner barrel wall and the outer barrel wall;

[0007] The plurality of partition ribs are connected to the ends of the inner barrel wall and the outer barrel wall in the air outlet direction of the annular air outlet duct, so that the air outlet ends of the annular air outlet duct form a plurality of air outlets spaced apart around the axis of the inner barrel wall;

[0008] The air outlet areas and / or cross-sectional shapes of at least two of the air outlets are different; and / or, the widths of the end faces of at least two of the partition ribs in the air outlet direction in the circumferential direction around the axis of the inner barrel wall are not equal.

[0009] In one embodiment, the air outlets extend in an arc strip shape around the axis of the inner cylinder wall, the widths of the plurality of air outlets in the radial direction of the inner cylinder wall are the same, and at least two of the air outlets correspond to different central angles.

[0010] In one embodiment, the central angles corresponding to two adjacent air outlets among the plurality of air outlets are all different.

[0011] In one embodiment, the absolute value of the difference between the central angles corresponding to two adjacent air outlets is greater than or equal to 1 degree and less than or equal to 5 degrees.

[0012] In one embodiment, the cross-sectional shapes of the plurality of air outlets are arranged in a profiling manner.

[0013] In one embodiment, the plurality of partition ribs include a first rib and a second rib. In the axial direction around the inner cylinder wall, the absolute value of the difference between the central angles corresponding to the widths of the end faces of the first rib and the second rib in the air outlet direction is greater than or equal to 2 degrees and less than or equal to 6 degrees.

[0014] In one embodiment, in the axial direction around the inner cylinder wall, the width of the end face of the first rib in the air outlet direction is greater than 1.5 mm, and the width of the second rib is greater than the width of the first rib; the number of the first ribs is greater than the number of the second ribs.

[0015] In one embodiment, the number of the second ribs is at least two, and at least one first rib is arranged between the two second ribs in the axial direction around the inner cylinder wall.

[0016] In one embodiment, the second rib includes a connecting rib and a widened portion connected to the end of the connecting rib in the air outlet direction, and the widened portion protrudes from the connecting rib on both sides in the circumferential direction of the inner cylinder wall.

[0017] The present invention also provides a handheld appliance, including a main body and the air outlet structure of the handheld appliance as described in any of the above embodiments. An air flow channel is formed in the main body, and the air outlet structure of the handheld appliance is arranged at the air outlet end of the air flow channel.

[0018] By making the air outlet areas and / or cross-sectional shapes of at least two of the air outlets different; and / or, the widths of the end faces of at least two of the partition ribs in the air outlet direction in the axial direction around the inner cylinder wall are not equal, the air outlet structure of the handheld appliance of the present invention can make the air flow velocities and / or paths of the air flows blown out by at least two air outlets different, eliminate the resonance between each air flow blown out by the plurality of air outlets and the air flows, thereby reducing or avoiding the buzzing sound generated when the hair dryer is in use, reducing the noise generated at the air outlet of the air outlet structure, and improving the user experience. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It shows a schematic structural diagram of an embodiment of the air outlet structure of the handheld device of the present invention;

[0021] Figure 2 For Figure 1 a schematic diagram of the angle marking of the air outlet structure in

[0022] Figure 3 For Figure 1 a schematic structural diagram of another angle of the air outlet structure in

[0023] Figure 4 For Figure 3 a schematic diagram of the back structure of the air outlet structure in

[0024] Figure 5 It shows a schematic structural diagram of an embodiment of the handheld device of the present invention;

[0025] Figure 6 For Figure 5 a sectional view of an angle of the body part of the handheld device in

[0026] Figure 7 For Figure 6 a partial enlarged view of part A in

[0027] Explanation of the reference numerals in the drawings:

[0028] Label Name Label Name Label Name 100 Air outlet structure 110 Inner cylinder wall 120 Outer cylinder wall 130 Annular air outlet duct 140 Air outlet 150 Partition rib 151 First rib 152 Second rib 153 Connecting rib 154 Widened part 200 Main body 210 Air flow channel

[0029] The realization of the object, functional features and advantages of the present invention will be further described in conjunction with the embodiments and the drawings. Detailed implementation manners

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If this specific posture changes, then such directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously.

[0033] The present invention provides an air outlet structure for a handheld appliance.

[0034] In the embodiments of the present invention, please refer to Figures 1 to 3 , Figure 6 and Figure 7 , the air outlet structure 100 of the handheld appliance includes an inner barrel wall 110, an outer barrel wall 120 disposed around the periphery of the inner barrel wall 110, and a plurality of partition ribs 150 spaced apart in the axial direction of the inner barrel wall 110. An annular air outlet duct 130 is formed between the inner barrel wall 110 and the outer barrel wall 120.

[0035] The plurality of partition ribs 150 are connected to the ends of the inner barrel wall 110 and the outer barrel wall 120 in the air outlet direction of the annular air outlet duct 130, so that the air outlet ends of the annular air outlet duct 130 form a plurality of air outlets 140 spaced apart around the axis of the inner barrel wall 110. The air outlet areas and / or cross-sectional shapes of at least two of the air outlets 140 are different; and / or, the widths of the end faces of at least two of the partition ribs 150 in the air outlet direction in the circumferential direction around the axis of the inner barrel wall 110 are not equal.

[0036] In this embodiment, the air outlet structure 100 may specifically be a component separated from the air duct housing of the handheld appliance. Of course, in some embodiments, the air outlet structure 100 may also be integrally formed with the air duct housing, that is, a part of the air duct housing forms the air outlet structure 100. To improve the smoothness of air outlet, the cross-section of the annular air outlet duct 130 formed by the inner cylinder wall 110 and the outer cylinder wall 120 is a circular ring. The trajectory and size of the annular air outlet duct 130 formed between the inner cylinder wall 110 and the outer cylinder wall 120 can be selected and designed according to actual needs. Optionally, to enhance the air outlet effect, the annular air outlet duct 130 has a horn section and a straight tube section connected to the front end of the horn section. The inner diameter of the horn section gradually decreases from the rear to the front towards the straight tube section, and the inner diameter of the straight tube section is basically the same before and after. The inner wall surfaces of the outer cylinder wall 120 and the inner cylinder wall 110 corresponding to the horn section can both be arc surfaces, inclined flat surfaces, or one of them can be an arc surface or an inclined flat surface, and the other can be a flat surface consistent with the axis of the inner cylinder wall 110. In this way, the air flow entering the air duct housing of the handheld appliance first gradually gathers in the straight tube section through the horn section of the annular air outlet duct 130 and flows out linearly outward, so as to improve the smoothness and efficiency of the air outlet of the hair dryer and enhance the air outlet effect.

[0037] The partition ribs 150 and the air outlets 140 can be set to five, six, seven, ten, etc. The number can be selected and designed according to actual needs and will not be specifically limited here. The partition ribs 150 can play a role in connecting the inner cylinder wall 110 and the outer cylinder wall 120. Generally, for improving the structural strength, the multiple partition ribs 150, the inner cylinder wall 110 and the outer cylinder wall 120 are integrally formed. The multiple partition ribs 150 are connected to the joints of the outer end faces and the inner circumferential walls of the inner cylinder wall 110 and the outer cylinder wall 120 to divide the air outlet end of the annular air outlet duct 130 into multiple arc-shaped air outlets 140.

[0038] It is possible to make the air outlet areas and / or cross-sectional shapes of two adjacent air outlets 140 different, or to make the air outlet areas and / or cross-sectional shapes of two non-adjacent air outlets 140 different. There are three cases where the air outlet areas and / or cross-sectional shapes of at least two air outlets 140 are different. In the first case, the air outlet areas of the two air outlets 140 are different, and the cross-sectional shapes are the same. That is, the two air outlets 140 are arranged in a profiling manner. Then, the two air outlets 140 can be designed to have the same width and different extension lengths; or the two air outlets 140 can be designed to have different widths and the same extension lengths; or the two air outlets 140 can be designed to have both different widths and different extension lengths, so as to make the air outlet areas of the two air outlets 140 different. In the second case, the air outlet areas of the two air outlets 140 are the same, and the cross-sectional shapes are different. For example, one of the air outlets 140 can be designed to be arc-shaped, and the other air outlet 140 can be designed to be wavy, or both air outlets 140 can be designed to be wavy with different shapes. Of course, the two air outlets 140 can also be designed into other shapes, which will not be specifically limited here. In the third case, the air outlet areas of the two air outlets 140 are different, and the cross-sectional shapes of the two air outlets 140 are different. At this time, the two air outlets 140 can be designed into different shapes to make the air outlet areas of the two different.

[0039] The width of the end face of the partition rib 150 in the air outlet direction of the annular air outlet duct 130 in the axial direction of the inner cylinder wall 110 is the distance between two adjacent air outlets 140. For the convenience of description, hereinafter, the width of the end face of the partition rib 150 in the air outlet direction of the annular air outlet duct in the axial direction of the inner cylinder wall 110 will be simply referred to as the width of the partition rib 150. It is made that the widths of the end faces of at least two partition ribs 150 in the air outlet direction in the axial direction of the inner cylinder wall 110 are not equal, that is, the plurality of partition ribs 150 do not equally divide the annular air outlet duct 130 in the circumferential direction. In this embodiment, it is possible to make the widths of the plurality of partition ribs 150 equal and the air outlet areas and / or cross-sectional shapes of at least two air outlets 140 different. It is also possible to make the widths of the plurality of partition ribs 150 not equal, and at the same time make the air outlet areas and / or cross-sectional shapes of at least two air outlets 140 different. It is also possible to make the air outlet areas and cross-sectional shapes of the plurality of air outlets 140 the same, and only make the widths of at least two partition ribs 150 not equal.

[0040] The air outlet structure 100 of the handheld device of the present invention makes the air outlet areas and / or cross-sectional shapes of at least two of the air outlets 140 different; and / or, the widths of the end faces of at least two of the partition ribs 150 in the air outlet direction are not equal in the direction around the axis of the inner cylinder wall 110. This can make the air flow velocities and / or paths of the air flows blown out by at least two air outlets 140 different, thereby eliminating the resonance between each air flow blown out by multiple air outlets 140, and further reducing or avoiding the buzzing sound generated when the hair dryer is in use, reducing the noise generated at the air outlets 140 of the air outlet structure 100, so as to improve the user experience.

[0041] In an embodiment, as Figures 1 to 5 shown, the air outlets 140 extend in an arc shape around the axis of the inner cylinder wall 110. The widths of multiple air outlets 140 in the radial direction of the inner cylinder wall 110 are the same, and the central angles corresponding to at least two of the air outlets 140 are different.

[0042] In this embodiment, the central angles corresponding to at least two air outlets 140 are different, that is, the extension lengths of at least two arc-shaped air outlets 140 are different. The widths of multiple air outlets 140 in the radial direction of the inner cylinder wall 110 are the same, which can make the widths of multiple air outlets 140 exactly the same, or there can be a manufacturing precision error not greater than 1 mm. By making the widths of multiple air outlets 140 in the radial direction of the inner cylinder wall 110 the same and the central angles corresponding to at least two air outlets 140 different, while achieving the same air outlet area of at least two air outlets 140, the overall consistency of multiple air outlets 140 can be ensured. It can be understood that when the handheld device is in use, multiple air outlets 140 are arranged on the side that users often observe. By making the widths of multiple air outlets 140 in the radial direction of the inner cylinder wall 110 the same and only making the central angles corresponding to at least two of the air outlets 140 different, the visual difference of the air outlets 140 with different air outlet areas for users can be reduced, making multiple air outlets 140 still have a symmetrical aesthetic feeling, and improving the user experience while reducing noise.

[0043] Furthermore, please refer to Figures 1 to 5 again. The cross-sectional shapes of multiple air outlets 140 are arranged in a profiling manner. In this way, the shapes of multiple air outlets 140 are roughly the same, which can further reduce the visual difference of the air outlets 140 with different air outlet areas for users, making multiple air outlets 140 have a strong symmetrical aesthetic feeling, and further improving the user experience while reducing noise.

[0044] Combined with the above embodiment in which the central angles corresponding to at least two of the air outlets 140 are different, further, as Figure 2As shown, the central angles corresponding to two adjacent ones of the plurality of air outlets 140 are all different (such as Figure 2 the angles α and β in). It can be understood that during use, the resonance between the airflows blown out by two adjacent air outlets 140 is the most serious. By making the central angles corresponding to two adjacent air outlets 140 among the plurality of air outlets 140 all different, the resonance between the arc-shaped strip air outlets 140 can be eliminated to the greatest extent, and further reduce the buzzing noise generated by the resonance between the airflows blown out by the plurality of air outlets 140, greatly improving the product quality and the user experience.

[0045] Furthermore, the absolute value of the difference between the central angles corresponding to two adjacent air outlets 140 (such as Figure 2 the angles α and β in) is greater than or equal to 1 degree and less than or equal to 5 degrees. The absolute value of the difference between the central angles corresponding to two adjacent air outlets 140 (that is, Figure 2 |α - β| in) can specifically be 1 degree, 2 degrees, 2.5 degrees, 3 degrees, 3.8 degrees, 4 degrees, 5 degrees, etc.

[0046] When the absolute value of the difference between the central angles corresponding to two adjacent air outlets 140 is less than 1 degree, the difference in the lengths of the two air outlets 140 is too small, so the effect of eliminating the resonance of the airflows blown out by the two adjacent air outlets 140 is weak, and the buzzing noise at the air outlets 140 cannot be effectively reduced. When the absolute value of the difference between the central angles corresponding to two adjacent air outlets 140 is greater than 5 degrees, the difference in the lengths of the two air outlets 140 is too large. Although the noise can be effectively eliminated in this way, it will affect the symmetrical beauty. By making the absolute value of the difference between the central angles corresponding to two adjacent air outlets 140 greater than or equal to 1 degree and less than or equal to 5 degrees, while effectively eliminating the resonance between the airflows blown out by two adjacent air outlets 140 and reducing the buzzing noise at the air outlets 140, the visual difference sense of the air outlets 140 with different air outlet areas for the user is reduced, making the plurality of air outlets 140 still have symmetrical beauty and improving the user experience.

[0047] In one embodiment, as Figures 1 to 3 、 Figure 5 shown, the plurality of partition ribs 150 include a first rib 151 and a second rib 152. In the axial direction around the inner cylinder wall 110, the absolute value of the difference between the central angles corresponding to the end face widths of the first rib 151 and the second rib 152 in the air outlet direction is greater than or equal to 2 degrees and less than or equal to 6 degrees.

[0048] In this embodiment, the central angle corresponding to the width of the first rib 151 is as Figure 2 the angle a in, and the central angle corresponding to the width of the second rib 152 is as Figure 2As shown by angle b therein. In the axial direction of the inner cylinder wall 110, the absolute value of the difference between the central angles corresponding to the widths of the end faces of the first rib 151 and the second rib 152 in the air outlet direction is |a - b|. |a - b| can specifically be 2 degrees, 2.5 degrees, 3 degrees, 4 degrees, 4.5 degrees, etc. When |a - b| is less than 2 degrees, the width difference between the first rib 151 and the second rib 152 is too small, and the effect of eliminating the resonance between the airflows blown out from the air outlet 140 is weak, and the buzzing noise at the air outlet 140 cannot be effectively reduced. When |a - b| is greater than 6 degrees, the width difference between the first rib 151 and the second rib 152 is too large, which has a great impact on the visual effect. By making |a - b| (in the axial direction of the inner cylinder wall 110, the absolute value of the difference between the central angles corresponding to the widths of the end faces of the first rib 151 and the second rib 152 in the air outlet direction) greater than or equal to 2 degrees and less than or equal to 6 degrees, while effectively eliminating the resonance between the airflows blown out from the air outlet 140 and reducing the buzzing noise at the air outlet 140, the visual difference sense of the user for the partition ribs 150 with different widths is reduced, so that the multiple air outlets 140 and the multiple partition ribs 150 still have a symmetrical beauty, thereby enhancing the user experience.

[0049] Further, in the axial direction of the inner cylinder wall 110, the width of the end face of the first rib 151 in the air outlet direction is greater than 1.5 mm, and the width of the second rib 152 is greater than the width of the first rib 151; the number of the first ribs 151 is greater than the number of the second ribs 152.

[0050] In this embodiment, when the width of the end face of the first rib 151 in the air outlet direction is less than 1.5 mm, the width of the first rib 151 is too small. On the one hand, the structural strength of the first rib 151 is low and it is easy to break. On the other hand, it is not conducive to eliminating the noise generated by the steady-state turbulence. By making the width of the second rib 152 greater than the width of the first rib 151 and the width of the end face of the first rib 151 in the air outlet direction greater than 1.5 mm, while ensuring the structural strength of the first rib 151 and the second rib 152, the airflows flowing towards the central area of the air outlet 140 due to the wall attachment effect are effectively separated and cannot merge to form a steady annular eddy current, and thus the noise generated by the steady-state turbulence can be effectively eliminated. It can be understood that the partition ribs 150 will block the airflows to a certain extent and reduce the air volume. By making the number of the first ribs 151 greater than the number of the second ribs 152, while being able to eliminate the noise caused by the resonance between the airflows blown out from the air outlet 140, the wind resistance of the partition ribs 150 is reduced to improve the overall air outlet effect.

[0051] In one embodiment, the number of the second ribs 152 is at least two, and at least one first rib 151 is arranged between the two second ribs 152 in the axial direction around the inner cylinder wall 110. Only one first rib 151 can be provided between the two second ribs 152, or two or more first ribs 151 can be provided. In this way, the air flow resonance between the plurality of air outlets 140 can be more effectively eliminated, the noise at the air outlets 140 can be further reduced, and the user experience can be improved.

[0052] In one embodiment, please refer to Figure 4 , the second rib 152 includes a connecting rib 153 and a widened portion 154 connected to the end of the connecting rib 153 in the air outlet direction, and the widened portion 154 protrudes from the connecting rib 153 on both sides in the circumferential direction of the inner cylinder wall 110. The shape and size of the connecting rib 153 can be the same as those of the first rib 151, which is more convenient for unified molding and manufacturing. By making the second rib 152 include the connecting rib 153 and the widened portion 154, while ensuring that the end face widths of the first rib 151 and the second rib 152 are different and effectively eliminating the resonance noise between the air flows at the air outlets 140, the thickness of the entire second rib 152 can be reduced, and further the influence on the air outlet flow can be reduced.

[0053] The present invention also provides a handheld device, such as Figures 5 to 7 shown. The handheld device includes a main body 200 and an air outlet structure 100 of the handheld device. The specific structure of the air outlet structure 100 of the handheld device refers to the above embodiment. An air flow channel 210 is formed in the main body 200, and the air outlet structure 100 of the handheld device is arranged at the air outlet end of the air flow channel 210. Since this handheld device adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one. The handheld device can specifically be a handheld hair dryer, a hair drying device, etc. A fan component and a heating component can be arranged in the handheld device. The fan component introduces air flow from the outside into the air flow channel 210 of the main body 200, and after being heated by the heating component, it is blown out from the plurality of air outlets 140 of the air outlet structure 100. There can be many connection methods between the air outlet structure 100 and the main body 200, which can specifically refer to the existing designs and will not be elaborated here.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An air outlet structure for a handheld device, characterized in that: It comprises an inner cylinder wall, an outer cylinder wall arranged around the outer periphery of the inner cylinder wall, and a plurality of barrier ribs arranged at intervals along the axis of the inner cylinder wall, wherein the plurality of barrier ribs, the inner cylinder wall and the outer cylinder wall are integrally formed; An annular air outlet duct is formed between the inner cylinder wall and the outer cylinder wall; A plurality of the barrier ribs are connected to the ends of the inner and outer cylinder walls in the air outlet direction of the annular air outlet duct, so that the air outlet end of the annular air outlet duct forms a plurality of air outlets spaced apart around the axis of the inner cylinder wall; The air outlet areas and / or cross-sectional shapes of at least two of the air outlets are different; the widths of the end surfaces of at least two of the barrier ribs in the air outlet direction in the axial direction around the inner cylinder wall are not equal.

2. The air outlet structure of the handheld device according to claim 1, characterized in that: The air outlets extend in an arc-shaped strip shape around the axis of the inner cylinder wall. The widths of the plurality of air outlets in the radial direction of the inner cylinder wall are consistent, and the central angles corresponding to at least two of the air outlets are different.

3. The air outlet structure of the handheld device according to claim 2, characterized in that: The central angles corresponding to two adjacent air outlets among the plurality of air outlets are different.

4. The air outlet structure of the handheld device according to claim 3, characterized in that: The absolute value of the difference between the central angles corresponding to two adjacent air outlets is greater than or equal to 1 degree and less than or equal to 5 degrees.

5. The air outlet structure of the handheld device according to claim 2, characterized in that: The cross-sectional shapes of the plurality of air outlets are arranged in a contoured manner.

6. The air outlet structure of the handheld device according to any one of claims 1 to 5, characterized in that: The plurality of barrier ribs include a first rib and a second rib. In the axial direction around the inner tube wall, the absolute value of the difference between the central angles corresponding to the widths of the terminal end faces of the first rib and the second rib in the air outlet direction is greater than or equal to 2 degrees and less than or equal to 6 degrees.

7. The air outlet structure of the handheld device according to claim 6, characterized in that: In the axial direction around the inner tube wall, the width of the end face of the first rib in the air outlet direction is greater than 1.5 mm, and the width of the second rib is greater than the width of the first rib; the number of the first ribs is greater than the number of the second ribs.

8. The air outlet structure of the handheld device according to claim 7, characterized in that: The number of the second ribs is at least two, and in the axial direction around the inner cylinder wall, at least one first rib is arranged between two of the second ribs.

9. The air outlet structure of the handheld device according to claim 7, characterized in that: The second rib includes a connecting rib and a widened portion connected to the end of the connecting rib in the air outlet direction, and the widened portion is provided on both sides of the connecting rib in the circumferential direction of the inner cylinder wall.

10. A handheld device, characterized in that: The invention comprises a main body and an air outlet structure of a handheld device according to any one of claims 1 to 9, wherein an air flow channel is formed in the main body, and the air outlet structure of the handheld device is arranged at the air outlet end of the air flow channel.

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