A multi-gradient air volume regulating accessory

Abstract

The application discloses a multi-gradient air volume adjusting accessory, which comprises an inner cylinder and a connecting cylinder; the inner cylinder is rotationally connected to the inside of the connecting cylinder and coaxially sleeved with the connecting cylinder; the inner cylinder is provided with an air inlet and at least one air control hole communicated with the air inlet; the cylinder wall of the connecting cylinder is provided with an air outlet matched with the air control hole for conduction; at least one side edge of the air control hole is formed with a gradually changing air adjusting edge, the profile of the gradually changing air adjusting edge is composed of at least one circumferentially arranged step section, the axial length of the air control hole is gradually increased or gradually decreased, the gradually changing air adjusting edge is sequentially corresponded with the air outlet by rotating the inner cylinder, different air control areas with the step change of the axial length are formed in the circumferential direction of the air control hole, the air control hole areas with different axial lengths are sequentially corresponded with the air outlet by rotating the inner cylinder, the effective ventilation area between the air control hole and the air outlet is changed, and multi-gradient air volume adjustment is realized.

Description

Technical Field

[0001] This invention belongs to the field of ventilation and adjustment technology in the beauty and hairdressing industry, specifically relating to a multi-gradient airflow adjustment accessory. Background Technology

[0002] In actual production, air volume adjustment accessories are widely used in various ventilation equipment such as hair dryers, ventilation ducts, and air conditioning systems to control the output air volume to meet the needs of different usage scenarios.

[0003] Currently, the common method of air volume adjustment is to drive the air valve blades or sealing plate to rotate by a motor, thereby changing the amount of obstruction to the air vent. This method is complex, has many parts, is costly, and requires high precision in motor control, making it prone to failure. For example, Chinese patent CN211011845U discloses an airflow regulating device that uses a screw and worm gear structure to drive a baffle plate to rotate, thereby achieving multi-level airflow regulation. However, such solutions typically rely on complex transmission mechanisms to switch gears, resulting in numerous parts, complex assembly processes, and high costs. Furthermore, traditional airflow regulating valves often require external locking mechanisms (such as locking nuts or locating pins) to maintain the regulating component in the set position, making operation cumbersome. Over time, wear of the locking mechanism can lead to problems such as unstable positioning and airflow drift. Simultaneously, most existing regulating devices make it difficult for users to visually determine the current gear and corresponding airflow level through external observation, thus the convenience and reliability of adjustment need improvement. Summary of the Invention

[0004] (1) Technical problems to be solved This invention discloses a multi-gradient airflow regulating accessory, which aims to solve the problems of existing airflow regulating accessories having complex structures, high assembly costs, requiring external locking mechanisms to maintain the gear position, resulting in inconvenient operation, easy wear and drift, and inability to intuitively determine the current airflow gear.

[0005] (2) Technical solution This invention discloses a multi-gradient airflow regulating accessory, including an inner cylinder, wherein the inner cylinder is provided with an air inlet and at least one air control hole communicating with the air inlet; A connecting cylinder is sleeved on the outside of the inner cylinder, and the inner cylinder is rotatably connected to the connecting cylinder, and the two are coaxially arranged; an air outlet is opened on the cylinder wall of the connecting cylinder to cooperate with the air control hole for conduction; Wherein, at least one edge of the air control hole is formed with a gradient air adjustment edge, the outline of the gradient air adjustment edge is composed of at least one stepped segment arranged in the circumferential direction, so that the air control hole forms different air control areas with stepped axial length in the circumferential direction. By rotating the inner cylinder, the air control hole areas of different axial lengths correspond sequentially to the air outlet, thereby changing the effective ventilation area between the air control hole and the air outlet and realizing multi-gradient air volume adjustment.

[0006] Furthermore, the stepped section includes a horizontal section and a vertical section, the horizontal section is connected to the vertical section, and the horizontal section is parallel to the central axis L1 of the inner cylinder.

[0007] Furthermore, the length of the horizontal section increases, decreases, or remains equal along the axial direction of the inner cylinder, and the length of the vertical section is equal to the circumferential length of the air outlet.

[0008] Furthermore, the gradual air-regulating edge is provided with two stepped sections, which divide the gradual air-regulating edge into three circumferentially distributed air-control zones to achieve three-level air regulation.

[0009] Furthermore, the air control hole has a stepped section at both ends along the axial direction; or the air control hole has a stepped section at one end along the axial direction and a straight section at the other end.

[0010] Furthermore, the air control hole is an elongated hole extending along the axial direction of the inner cylinder, and its axial length is less than or equal to the axial width of the air outlet.

[0011] Furthermore, there are two air control holes, which are spaced apart along the circumference of the inner cylinder. Two air outlets are correspondingly opened on the wall of the connecting cylinder, and the two air outlets are respectively matched with the two air control holes in a radial direction.

[0012] Furthermore, both air control holes are provided with the gradient air adjustment edge, or one air control hole is provided with the gradient air adjustment edge, while the other air control hole is not provided with the gradient air adjustment edge.

[0013] Furthermore, the air outlet of the connecting cylinder is provided with several grilles, and each grille is spaced apart along the central axis of the connecting cylinder to divide the air outlet into multiple outlets. The inner cylinder is provided with several partitions corresponding to the grilles.

[0014] Furthermore, the inner cylinder includes a detachably connected housing 1 and housing 2. The connecting cylinder is connected to an installation component via a snap fastener on the side near the air inlet. The installation component is used to connect with a hair dryer. The inner cylinder is provided with an end cap on the side away from the air inlet. The end cap is inserted into the inner cylinder and is rotatably connected to the connecting cylinder.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting a gradual air-adjusting edge composed of stepped sections at the edge of the air control hole in the inner cylinder, the axial length of the air control hole increases or decreases step by step when it rotates, which can achieve precise segmented control of air volume in multiple levels without the need for additional sealing components. This simplifies the operation steps and improves the reliability and convenience of adjustment.

[0016] 2. In actual use, users only need to directly observe the air outlet on the wall of the connecting cylinder to intuitively judge the current gear and the corresponding air volume by observing the size of the ventilation area exposed by the controlled air hole; the larger the ventilation area, the larger the air volume; and vice versa. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is an exploded view of the overall structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the inner cylinder structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the air outlet usage state of the present invention. Figure 1 .

[0021] Figure 5 This is a schematic diagram of the air outlet usage state of the present invention. Figure 2 .

[0022] Figure 6 This is a schematic diagram of the air outlet usage state of the present invention. Figure 3 .

[0023] Figure 7 This is a side sectional view of the inner cylinder and connecting cylinder of the present invention.

[0024] Figure 8 This is a schematic diagram of the connecting cylinder structure of the present invention.

[0025] Figure 9 This is a schematic diagram of the inner cylinder explosion of the present invention.

[0026] Figure 10 This is a sectional view of the inner cylinder side of the present invention.

[0027] Figure 11 This is an exploded view of the inner cylinder and end cap of the present invention.

[0028] Figure 12 This is an overall sectional view of the present invention.

[0029] Figure 13 This is an exploded view of the connecting cylinder and mounting component of the present invention.

[0030] Figure 14 This is a cross-sectional view of the connection between the connecting cylinder and the mounting component of the present invention.

[0031] Reference numerals: 1-Inner cylinder, 11-Air inlet, 12-Air control hole, 121-Gradual air adjustment edge, 122-Step section, 1221-Horizontal section, 1222-Vertical section, 13-Shell 1, 131-Connecting column, 132-Protrusion, 14-Shell 2, 141-Connecting hole, 142-Mounting groove, 15-Plug-in hole, 16-Separator, 2-Connecting cylinder, 21-Air outlet, 22-Snap-fit ​​groove, 23-Grate, 3-End cap, 31-Plug-in column, 32-Rotating part, 33-Mounting part, 4-Mounting component, 41-Snap fastener. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1-2 As shown, the present invention discloses a multi-gradient airflow regulating accessory, including an inner cylinder 1 and a connecting cylinder 2; the inner cylinder 1 is rotatably connected to the inside of the connecting cylinder 2, and the two are coaxially sleeved; the inner cylinder 1 is provided with an air inlet 11 and at least one air control hole 12 communicating with the air inlet 11; the connecting cylinder 2 has an air outlet 21 on its cylinder wall that cooperates with and communicates with the air control hole 12.

[0034] Among them, such as Figure 2-3 As shown, the air control hole 12 has a gradient air adjustment edge 121 formed on at least one side edge. The outline of the gradient air adjustment edge 121 is composed of at least one stepped segment 122 arranged in the circumferential direction. The axial length of the air control hole 12 changes gradually when rotated. By rotating the inner cylinder 1, the gradient air adjustment edge 121 can be made to correspond to the air outlet 21 in turn, so that the air control hole 12 forms different air control areas with stepped axial length in the circumferential direction. By rotating the inner cylinder 1, the air control holes 12 regions of different axial lengths correspond sequentially to the air outlet 21, thereby changing the effective ventilation area between the air control holes 12 and the air outlet 21 and realizing multi-gradient air volume adjustment.

[0035] In practical use, such as Figure 4-6As shown, the user only needs to rotate the inner cylinder 1 along the central axis L1 to switch the air control holes 12 of different air outlet lengths in different areas to connect with the air outlet 21, thereby obtaining multiple levels of air volume output. This structure does not require additional sealing components. It can achieve precise segmented control of air volume by simply cooperating with the gradual air adjustment edge 121 and the stepped section 122. This simplifies the operation steps and improves the reliability and convenience of adjustment. It is suitable for various ventilation equipment that require multi-level air volume adjustment. It solves the problems of existing air volume adjustment accessories that require external locking mechanisms to maintain the set position, which is inconvenient to operate. After long-term use, they are prone to wear and tear, resulting in unstable positioning and air volume drift. In addition, the structure has many parts, complex assembly, and high cost.

[0036] In actual use, users can directly observe the air outlet 21 on the wall of the connecting cylinder 2 and intuitively judge the current gear and the corresponding air volume by observing the size of the ventilation area exposed by the controlled air hole 12 at that location. The larger the ventilation area, the larger the air volume; conversely, the smaller the area, the smaller the air volume.

[0037] Specifically, such as Figure 3 As shown, the stepped section 122 includes a horizontal section 1221 and a vertical section 1222. The horizontal section 1221 is perpendicular to the vertical section 1222 and parallel to the central axis L1 of the inner cylinder 1. The vertical section 1222 has the same circumferential length as the air outlet 21. The horizontal section 1221 is used to determine the axial length of the air control hole 12 corresponding to the stepped section 122, that is, to determine the actual ventilation area at that setting. The vertical section 1222 serves as a transition connection surface between two adjacent horizontal sections 1221.

[0038] Furthermore, the gradient air-regulating edge 121 is provided with two stepped sections 122, which divide the gradient air-regulating edge 121 into three circumferentially distributed air-control areas. Each of the three areas corresponds to a different length of a horizontal section 1221, i.e., a different axial length of an air-control hole 12. This achieves three-level airflow regulation. Each horizontal section 1221 is spaced apart circumferentially along the inner cylinder 1, and each vertical section 1222 is spaced apart along the central axis L1 of the inner cylinder 1. By providing two stepped sections 122, combined with the initial non-stepped area, the vertical section 1222 has the same circumferential length as the air outlet 21, forming three air outlet areas of different lengths. The width of one of the air outlet areas is equal to the width of the air outlet 21, thus achieving three-level airflow regulation. The horizontal and vertical sections 1221 are distributed at intervals along the circumference, so that during the rotation of the inner cylinder 1, the air outlet 21 is aligned with the air outlet area of ​​different lengths in turn, thereby realizing the gradual switching of air volume from small to large or from large to small.

[0039] In use, the corresponding stepped section 122 of the gradient air-adjusting edge 121 extends into the range of the air outlet 21, partially obstructing the air outlet 21. The unobstructed opening area is the effective ventilation area of ​​that setting. The obstructed area of ​​the air outlet 21 varies accordingly. When switching to the next setting, the edge of the air outlet 21 crosses the current vertical section 1222 and enters the next horizontal section 1221. Users can intuitively judge the current setting and air volume by observing the ratio of the obstructed to the unobstructed area of ​​the air outlet 21.

[0040] The lengths of each of the horizontal segments 1221 or the vertical segments 1222 are equal. The vertical segments 1222 increase or decrease step by step along the rotation direction of the inner cylinder, and the lengths of the horizontal segments 1221 increase or decrease step by step along the axial length of the inner cylinder 1.

[0041] In one embodiment, the air control hole 12 described above is provided with stepped sections 122 on both sides along the axial direction; when the inner cylinder 1 is rotated, the air outlet 21 is simultaneously blocked or released by the corresponding stepped sections 122 on both sides along the axial direction, so that the change in effective ventilation area is the sum of the changes on both sides, thereby obtaining a larger air volume adjustment range within the same rotation stroke, which is suitable for scenarios that require a wide range of air volume adjustment.

[0042] In another embodiment, such as Figure 7 As shown, the air control hole 12 has a stepped section 122 at one end along the axial direction, and a straight section at the other end. That is, only one side edge is formed with a gradient air-adjusting edge 121, and the other side edge is a straight edge. When rotating, only the stepped section 122 on one side participates in blocking or releasing the air outlet 21. This solution has a simpler structure and is easier to manufacture. At the same time, the effective ventilation area changes unidirectionally with rotation, and the adjustment logic is more intuitive. It is suitable for application scenarios where the adjustment range requirement is not large, but structural simplification and cost control are sought.

[0043] The air control hole 12 is an elongated hole extending axially along the inner cylinder 1, and its axial length is less than or equal to the axial width of the air outlet 21. In this embodiment, the maximum air outlet length of the air control hole 12 is equal to the axial length of the air outlet 21. When the inner cylinder 1 rotates to different positions, both axial sides of the air outlet 21 are within the axial range of the air control hole 12, ensuring that the air outlet 21 can be completely covered or partially blocked by the air control hole 12 at each position. This avoids situations where the edge of the air outlet 21 exceeds the range of the air control hole 12 due to insufficient axial length, resulting in air leakage or uncontrollable ventilation, thus ensuring the effectiveness and accuracy of airflow adjustment at each position. At the same time, this dimensional relationship means that the blocking and releasing of the air outlet 21 by the air control hole 12 depends only on the change in the axial length of the stepped section 122, that is, only determined by the circumferential rotation angle of the inner cylinder 1. The circumferential width of the non-perforated cylindrical wall portion between two adjacent air control holes 12 is greater than or equal to the circumferential width of the air outlet 21, so as to form a completely blocked state when the inner cylinder rotates to the point where the non-perforated cylindrical wall portion is directly opposite the air outlet 21.

[0044] The number of air control holes 12 is provided in multiple ways, with at least one air control hole 12 provided. The number of air control holes 12 can be adjusted according to actual needs.

[0045] In this embodiment, there are two air control holes 12, which are spaced apart along the circumference of the inner cylinder 1. The two air control holes 12 can provide a larger total ventilation area and improve ventilation efficiency.

[0046] In one embodiment, both air control holes 12 are provided with the gradient air adjustment edge 121; that is, both air control holes 12 have multi-level air adjustment functions, and the effective ventilation area of ​​the air outlets 21 on both sides changes synchronously and step by step when rotating, so as to obtain a larger total adjustment range and a richer combination of gears.

[0047] In another embodiment, one of the air control holes 12 is provided with the gradual air adjustment edge 121, while the other air control hole 12 is not provided with the gradual air adjustment edge 121. That is, the side with the gradual air adjustment edge 121 can achieve multi-level adjustment, while the side without it is in a normal open state, providing a basic air volume. The two are used together to perform multi-level fine-tuning on top of the basic air volume, meeting scenarios that have both basic ventilation needs and require fine adjustment.

[0048] like Figure 8 As shown, two air outlets 21 are correspondingly opened on the wall of the connecting cylinder 2, and the two air outlets 21 are respectively matched with the two air control holes 12 in a radial direction.

[0049] like Figure 9 As shown, the two air outlets 21 are arranged at intervals along the axial direction of the connecting cylinder 2, and the two air outlets 21 are arranged at 180° in the circumferential direction of the connecting cylinder 2.

[0050] Specifically, such as Figure 3 and Figure 8 As shown, the air outlet 21 of the connecting cylinder 2 is provided with a plurality of grilles 23, and each grille 23 is arranged at intervals along the central axis of the connecting cylinder 2, dividing the air outlet 21 into multiple outlets; correspondingly, the inner cylinder 1 is provided with a plurality of partitions 16 corresponding to the grilles 23.

[0051] In use, the grille 23 cooperates with the partitions 16. When the inner cylinder 1 is rotated to adjust the airflow, each partition 16 rotates with the inner cylinder 1, forming different alignment or misalignment states with the grille 23, realizing independent on / off control of each outlet, further improving the accuracy and flexibility of airflow adjustment. At the same time, the combined action of the grille 23 and the partitions 16 can divide the airflow into multiple fine streams, making the airflow more uniform and gentle.

[0052] Specifically, such as Figure 9 As shown, the inner cylinder 1 includes a first shell 13 and a second shell 14, which are detachably connected. In this embodiment, the first shell 13 and the second shell 14 are connected by a plug-in fit.

[0053] Furthermore, such as Figure 9 As shown, the first housing 13 is provided with a connecting post 131, and the second housing 14 is provided with a connecting hole 141. The connecting post 131 is inserted into the connecting hole 141 to complete the positioning and assembly.

[0054] Furthermore, the connecting post 131 is provided with a screw hole, and the fastener passes through the connecting hole 141 and is screwed into the screw hole to lock and fix the housing 13 and the housing 2 14.

[0055] In the above structure, the plug-in connection enables quick positioning and initial connection, and then fastening is achieved by fasteners. This ensures assembly efficiency while improving connection stability, effectively preventing loosening during use, and ensuring the structural reliability of the inner cylinder 1 under repeated rotation and vibration environments.

[0056] Furthermore, such as Figure 10 As shown, the first housing 13 is provided with a protrusion 132, and the second housing 14 is provided with a mounting groove 142 adapted to the protrusion 132. Both the protrusion 132 and the mounting groove 142 extend along the axial direction of the inner cylinder 1. Thus, when inserted, the protrusion 132 and the mounting groove 142 cooperate to guide and position, ensuring accurate docking of the two housings; at the same time, they form a circumferential limit, transmit rotational loads, share the force of the connecting column 131, and enhance the torsional resistance and structural stability of the inner cylinder 1.

[0057] Furthermore, such as Figure 11 As shown, the inner cylinder 1 is provided with an end cap 3 on the side away from the air inlet 11. The end cap 3 is inserted into the inner cylinder 1 and is rotatably connected to the connecting cylinder 2. The end cap 3 is inserted into the inner cylinder 1, which facilitates disassembly and maintenance. The end cap 3 also acts as a seal to the inside of the inner cylinder 1, preventing airflow leakage from the end and ensuring the effectiveness of airflow regulation.

[0058] In use, the user holds the end cap 3 or the exposed end of the inner cylinder 1 and applies force to rotate it. The end cap 3 drives the inner cylinder 1 to rotate inside the connecting cylinder 2, so that the air outlet 21 corresponds to the air control hole 12 area of ​​different gears, realizing the switching of air volume. The end cap 3 serves as both the operating end of the rotation operation and the axial limit and sealing element of the inner cylinder 1, with a compact structure and integrated functions.

[0059] Furthermore, such as Figure 12 As shown, the inner cylinder 1 is provided with a plug hole 15, and the end cap 3 is provided with a plug post 31. The plug hole 15 is adapted to the plug post 31. The plug post 31 is inserted into the plug hole 15, so that the end cap 3 is fixedly connected to the inner cylinder 1. The user can drive the inner cylinder 1 to rotate synchronously by rotating the end cap 3 to realize gear switching. At the same time, the plug structure facilitates the quick disassembly and assembly of the end cap 3, and facilitates internal cleaning and maintenance.

[0060] Furthermore, such as Figure 11 As shown, the end cap 3 includes a rotating part 32 and a mounting part 33. The rotating part 32 and the mounting part 33 are integrally formed. The rotating part 32 is for the user to hold and apply force, and the mounting part 33 is used to connect with the inner cylinder 1. The integral forming of the two ensures the structural strength, avoids loosening during use, and reduces the number of parts, making assembly easier.

[0061] Furthermore, such as Figure 13 As shown, the connecting tube 2 is connected to the mounting part 4 via a snap fastener on the side near the air inlet 11. The mounting part 4 is used to connect to the hair dryer. The mounting part 4 allows the accessory to be quickly installed on the air outlet of the hair dryer. The snap fastener connection can be completed without the need for tools, making it convenient to operate. At the same time, the mounting part 4 serves as a transition interface, and the corresponding specification of the mounting part 4 can be replaced according to different models of hair dryers without replacing the entire accessory, thus improving versatility and adaptability.

[0062] Specifically, such as Figure 14 As shown. The mounting component 4 is provided with a snap-fit ​​component 41, and the connecting cylinder 2 is provided with a snap-fit ​​groove 22. The snap-fit ​​component 41 snaps into the snap-fit ​​groove 22 to achieve a snap-fit ​​connection between the two. Through the cooperation of the snap-fit ​​component 41 and the snap-fit ​​groove 22, the mounting component 4 and the connecting cylinder 2 can be quickly assembled and disassembled without the aid of tools, making the operation convenient. At the same time, the snap-fit ​​connection has a good positioning and locking effect, ensuring that the mounting component 4 and the connecting cylinder 2 are firmly connected during use and preventing loosening.

[0063] The working principle of the present invention will be explained in detail below; This invention utilizes the rotating inner cylinder 1 and the gradually changing air-adjusting edge 121 formed by stepped segments 122 at the edge of its air control hole 12 to create multiple air-control areas with different axial lengths in the circumferential direction. When the user rotates the inner cylinder 1, these areas with different axial lengths are sequentially aligned with the air outlet 21 on the connecting cylinder 2. By changing the area of ​​the air outlet 21 that is blocked, the effective ventilation area increases or decreases step by step, thereby achieving precise segmented control of multiple air volume levels. Furthermore, the user can directly observe the size of the visible ventilation area at the air outlet 21 to intuitively determine the current level and air volume.

[0064] The innovation of this invention lies in setting a gradually changing air-adjusting edge composed of stepped sections at the edge of the air control hole in the inner cylinder. Utilizing the stepped structure formed by the horizontal and vertical sections, the axial length of the air control hole increases or decreases progressively as it rotates. This allows for precise segmented control of airflow at multiple levels without the need for additional sealing components, simplifying operation and improving the reliability and convenience of adjustment. In actual use, users can directly observe the air outlet on the connecting cylinder wall to intuitively determine the current level and corresponding airflow by observing the size of the ventilation area exposed by the air control hole; a larger ventilation area results in a larger airflow, and vice versa.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-gradient airflow regulating accessory, characterized in that, include: The inner cylinder (1) is provided with an air inlet (11) and at least one air control hole (12) communicating with the air inlet (11). A connecting cylinder (2) is sleeved on the outside of the inner cylinder (1). The inner cylinder (1) is rotatably connected to the connecting cylinder (2), and the two are coaxially arranged. An air outlet (21) is opened on the cylinder wall of the connecting cylinder (2) to cooperate with the air control hole (12). Among them, at least one side edge of the air control hole (12) is formed with a gradient air adjustment edge (121), and the outline of the gradient air adjustment edge (121) is composed of at least one stepped segment (122) arranged in the circumferential direction, so that the air control hole (12) forms different air control areas with stepped axial length in the circumferential direction. By rotating the inner cylinder (1), the air control hole (12) areas of different axial lengths correspond to the air outlet (21) in sequence, so as to change the effective ventilation area between the air control hole (12) and the air outlet (21) and realize multi-gradient air volume adjustment.

2. The multi-gradient airflow regulating accessory according to claim 1, characterized in that, The stepped section (122) includes a horizontal section (1221) and a vertical section (1222), the horizontal section (1221) is connected to the vertical section (1222), and the horizontal section (1221) is parallel to the central axis L1 of the inner cylinder (1).

3. The multi-gradient airflow regulating accessory according to claim 2, characterized in that, The length of the horizontal section (1221) increases, decreases or is equal to the axial length of the inner cylinder (1) at each step, and the length of the vertical section (1222) is equal to the circumferential length of the air outlet (21).

4. The multi-gradient airflow regulating accessory according to claim 3, characterized in that, The gradual wind control edge (121) is provided with two stepped sections (122), which divide the gradual wind control edge (121) into three wind control areas distributed along the circumference, thereby realizing three-level wind control.

5. A multi-gradient airflow regulating accessory according to claim 4, characterized in that, The air control hole (12) is provided with the stepped section (122) at both ends along the axial direction; or the air control hole (12) is provided with the stepped section (122) at one end along the axial direction and a straight section at the other end.

6. The multi-gradient airflow regulating accessory according to claim 1, characterized in that, The air control hole (12) is an elongated hole extending along the axial direction of the inner cylinder (1), and its axial length is less than or equal to the axial width of the air outlet (21).

7. A multi-gradient airflow regulating accessory according to claim 6, characterized in that, Two air control holes (12) are provided, which are spaced apart along the circumference of the inner cylinder (1). Two air outlets (21) are correspondingly opened on the cylinder wall of the connecting cylinder (2). The two air outlets (21) are respectively matched with the two air control holes (12) in a radial direction.

8. A multi-gradient airflow regulating accessory according to claim 7, characterized in that, Both of the air control holes (12) are provided with the gradual air adjustment edge (121), or one of the air control holes (12) is provided with the gradual air adjustment edge (121), and the other air control hole (12) is not provided with the gradual air adjustment edge (121).

9. A multi-gradient airflow regulating accessory according to claim 1, characterized in that, The air outlet (21) of the connecting cylinder (2) is provided with several grilles (23), and each grille (23) is arranged at intervals along the central axis of the connecting cylinder (2) to divide the air outlet (21) into multiple outlets. The inner cylinder (1) is provided with several partitions (16) corresponding to the grilles (23).

10. A multi-gradient airflow regulating accessory according to claim 1, characterized in that, The inner cylinder (1) includes a detachably connected housing one (13) and a housing two (14). The connecting cylinder (2) is connected to an installation part (4) by a snap fastener on the side near the air inlet (11). The installation part (4) is used to connect with a hair dryer. The inner cylinder (1) is provided with an end cap (3) on the side away from the air inlet (11). The end cap (3) is inserted into the inner cylinder (1) and is rotatably connected to the connecting cylinder (2).

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