A switchable air direction fitting

Abstract

The application discloses a switching air direction accessory, which comprises a positioning cylinder and an outer cylinder. The positioning cylinder comprises an air cavity, an air inlet and an air outlet. The air outlet is arranged on the outer circumferential wall of the positioning cylinder and extends in parallel with the central axis of the positioning cylinder. The outer cylinder is rotationally connected to the positioning cylinder and has at least a deflection position and a direct blowing position. The outer circumferential wall of the outer cylinder is provided with an opening extending in the axial direction. At least one inclined surface is arranged on the air outlet. The opening comprises a side wall. In the deflection position, the side wall of the opening and the inclined surface are adjacent in the circumferential direction of the positioning cylinder, and a gap is formed between the side wall and the inclined surface. The gap is used for guiding the airflow to the outer circumferential wall surface of the positioning cylinder, so that the airflow flows along the outer circumferential wall surface. In the direct blowing position, a straight-through air passage is formed between the opening and the air outlet, so that the airflow is directly guided out of the opening. The inclined surface and the side wall realize the switching of airflow wall adhesion or direct blowing. The structure is simple, and the cost is low.

Description

Technical Field

[0001] This invention belongs to the field of ventilation equipment technology, and specifically relates to a component for switching airflow direction. Background Technology

[0002] Existing blower or ventilation equipment typically has a fixed airflow direction, making it difficult to flexibly adjust the airflow direction according to usage requirements. To achieve airflow direction switching, existing solutions often employ additional air guides, baffles, louvers, or independent airflow guiding components, such as movable blades or baffles at the air outlet, allowing manual or electric adjustment of the blade angle to change the airflow direction. However, this type of structure has the following drawbacks: First, the air guiding components need to be independently installed inside the duct or at the air outlet, increasing the number of parts and assembly steps, resulting in higher manufacturing costs; second, the air guiding components extending into the duct obstruct airflow, causing significant air volume and pressure losses, reducing airflow efficiency; third, airflow direction switching usually requires multiple steps or relies on complex transmission mechanisms, making the switching process inconvenient and difficult to achieve rapid and flexible airflow direction adjustment; fourth, for structures where the air outlet is located on the side wall of the duct, airflow direction adjustment is even more difficult.

[0003] For example, Chinese patent CN201948229U discloses a hair dryer shroud, which has an air direction adjustment plate inside the shroud body. The air direction is changed by adjusting the angle of the air direction adjustment plate through a control valve. Although this solution can achieve air direction adjustment, the air direction adjustment plate extends into the airflow channel, which will significantly obstruct the airflow, and the adjustment structure is relatively complicated. Summary of the Invention

[0004] (1) Technical problems to be solved This invention discloses a wind direction switching accessory, which aims to solve the problems of complex structure, large wind loss and inconvenient operation when switching wind direction in existing air outlet equipment.

[0005] (2) Technical solution This invention discloses a wind direction switching accessory, comprising: The positioning cylinder includes a wind cavity, an air inlet and an air outlet communicating with the wind cavity, wherein the air outlet is disposed on the outer peripheral wall of the positioning cylinder and the length extension direction is parallel to the central axis L1 direction of the positioning cylinder. The outer cylinder is rotatably connected to the positioning cylinder and has at least a deflection position and a direct blowing position. An opening is provided on the outer peripheral wall of the outer cylinder along the axial extension direction. The air outlet has at least one inclined surface, and the opening includes a sidewall. In the deflection position, the sidewall of the opening and the inclined surface are adjacent to each other in the circumferential direction of the positioning cylinder, and a gap is formed between the sidewall and the inclined surface. The gap is used to guide the airflow to the outer peripheral wall surface of the positioning cylinder, so that the airflow flows along the outer peripheral wall surface. In the direct-blowing position, a direct air passage is formed between the opening and the air outlet, allowing the airflow to be directly discharged outward through the opening.

[0006] Furthermore, there are two inclined surfaces, which are respectively arranged on both sides of the circumference of the air outlet and are symmetrically arranged about the central axis L2 of the air outlet.

[0007] Furthermore, the deflection position includes a first deflection position and a second deflection position; in the first deflection position, one sidewall of the opening is adjacent to one of the two inclined planes, causing the airflow to deflect in a first direction; in the second deflection position, the other sidewall of the opening is adjacent to the other of the two inclined planes, causing the airflow to deflect in a second direction, which is opposite to the first direction.

[0008] Furthermore, the circumferential width of the opening is greater than or equal to the circumferential air outlet width; the axial length of the opening is greater than or equal to the axial length of the air outlet.

[0009] Furthermore, the air outlet is provided with one side, and the air outlet is provided with one inclined surface on one side or one inclined surface on each side of the air outlet.

[0010] Furthermore, there are two air outlets, which are distributed around the circumference of the positioning cylinder; each air outlet has one or two inclined surfaces.

[0011] Furthermore, the outer cylinder has a protrusion at the end away from the air inlet, and the protrusion is distributed circumferentially along the outer cylinder to facilitate rotation of the outer cylinder.

[0012] Furthermore, the outer peripheral wall of the outer cylinder is provided with a comb tooth row, the comb tooth row including a number of comb teeth spaced apart along the axial direction of the outer cylinder; the comb tooth row is provided in two sets and is arranged symmetrically at 180°.

[0013] Furthermore, the air outlet is provided with several dividing strips extending along its length, which divide the air outlet into multiple grilles.

[0014] Furthermore, the end of the positioning cylinder near the air inlet is detachably connected to an installation component, which is used to connect to external ventilation equipment.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. An opening is made only on the outer cylinder and a slope is set at the air outlet. No additional air guide plate, wind deflector, louver or control valve or other independent air guiding components are required. The air direction can be switched by a single rotation action, which effectively reduces the number of parts and assembly process. The structure is simple and the manufacturing cost is reduced. No additional parts extend into the air cavity or air outlet in the entire airflow channel. The airflow is not subject to additional obstruction during the switching process. Compared with the traditional air guiding structure, the air volume loss is significantly reduced and the air outlet efficiency is high. Moreover, the present invention uses the Coanda effect to guide the airflow to the outer peripheral wall surface of the positioning cylinder and flow along the wall to achieve smooth deflection of the airflow direction and avoid turbulence and energy loss caused by the airflow hitting the baffle.

[0016] 2. When the two inclined planes are symmetrically set on both sides of the air outlet, by rotating the outer cylinder in the forward or reverse direction, the two side walls of the opening will cooperate with the two inclined planes respectively, which can realize the wall-mounted deflection air supply in two opposite directions. The user can switch by rotating with one hand, which is intuitive and convenient. 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 side sectional view of the present invention.

[0020] Figure 4 This is a schematic diagram of the positioning cylinder structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the outer cylinder structure of the present invention.

[0022] Figure 6 The wall-attached circulation state of the present invention Figure 1 .

[0023] Figure 7 The wall-attached circulation state of the present invention Figure 2 .

[0024] Figure 8 A cross-sectional view of the wall-attached circulation of the present invention. Figure 1 .

[0025] Figure 9 A cross-sectional view of the wall-attached circulation of the present invention. Figure 2 .

[0026] Figure 10 This is the direct blowing state of the present invention. Figure 1 .

[0027] Figure 11 This is the direct blowing state of the present invention. Figure 2 .

[0028] Figure 12 This is a direct cross-sectional view of the present invention.

[0029] Figure 13 This is a front view of the air outlet of the positioning cylinder of the present invention.

[0030] Figure 14 This is a diagram showing the usage state of the comb teeth array of the present invention.

[0031] Figure 15 This is a schematic diagram of the connection between the snap-fit ​​component and the snap-fit ​​slot of the present invention.

[0032] Figure 16 For the present invention Figure 3 Enlarged view of point A.

[0033] Figure 17 This is a schematic diagram showing the connection between the inner cylinder, outer cylinder, and positioning cylinder of the present invention.

[0034] Figure 18 This is an exploded schematic diagram of the inner cylinder, outer cylinder, and positioning cylinder of the present invention.

[0035] Figure 19 This is a schematic diagram of the inner cylinder structure of the present invention.

[0036] Figure 20 This is a cross-sectional view of the connection between the inner cylinder and the positioning cylinder of the present invention.

[0037] Reference numerals: 1-Outer cylinder, 11-Opening, 111-Side wall, 112-Gap, 12-Comb tooth row, 121-Comb tooth, 13-Connecting part, 14-Protrusion, 2-Positioning cylinder, 21-Air inlet, 22-Air outlet, 221-Sloping surface, 222-Separator strip, 23-Air cavity, 24-Cavity, 25-Snap-fit ​​groove, 3-End cap, 4-Mounting piece, 41-Step one, 42-Step two, 43-Snap-fit ​​piece, 5-Inner cylinder, 51-Opening, 511-Step edge, 5111-Vertical edge, 5112-Horizontal edge, 6-Deflection position, 61-First deflection position, 62-Second deflection position, 7-Direct blowing position. Detailed Implementation

[0038] 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.

[0039] like Figure 1-3As shown, the present invention discloses a wind direction switching accessory, including an outer cylinder 1 and a positioning cylinder 2 that are cylindrical and hollow inside. The outer cylinder 1 is rotatably connected to the positioning cylinder 2. The positioning cylinder 2 is provided with an air inlet 21, an air outlet 22 and an air cavity 23. The air cavity 23 is connected to the air inlet 21 and the air outlet 22 respectively. The air outlet 22 is disposed on the outer peripheral wall of the positioning cylinder 2 and its length extension direction is parallel to the central axis L1 direction of the positioning cylinder 2. like Figure 4-5 As shown, the outer cylinder 1 is rotatably connected to the positioning cylinder 2, and has at least a deflection position 6 and a direct blowing position 7. The outer peripheral wall of the outer cylinder 1 has an opening 11 along the axial extension direction, and the opening 11 includes two symmetrically arranged side walls 111. When using, such as Figure 6-9 As shown, the outer cylinder 1 is rotated so that the outer cylinder 1 is in the deflection position 6. At this time, the side wall 111 of the opening 11 is adjacent to the inclined surface 221, and a gap 112 is formed between the side wall 111 and the inclined surface 221. The gap 112 is used to guide the airflow to the outer peripheral wall surface of the positioning cylinder 2, so that the airflow flows along the outer peripheral wall surface. Rotate the outer cylinder 1, as follows Figure 10-12 As shown, the outer cylinder 1 is positioned in the direct-blowing position 7. In the direct-blowing position 7, a direct airflow path is formed between the opening 11 and the air outlet 22. The side wall 111 of the outer cylinder 1 does not constitute a guiding constraint on the airflow from the air outlet 22 to the opening 11. At this time, the opening 11 does not block the air outlet 22, nor does the outer cylinder 1 partially block the air outlet 22. However, there is a certain distance between the side wall 111 and the inclined surface 221, achieving direct blowing. When the outer cylinder 1 is continuously rotated, causing the opening 11 and the air outlet 22 to be misaligned, the air outlet 22 is blocked, and air cannot flow out.

[0040] With this design, only an opening 11 needs to be made on the outer tube 1, along with the inclined surface 221 at the air outlet 22. Without the need for additional air guiding components, the switching between direct airflow and wall-mounted circulating airflow can be achieved with a single rotation action, making it convenient for users to operate and select. When curling hair, it can be rotated to the deflection position 6 to receive hot air, and the hair can be wrapped around the outer tube 1 to achieve the curling operation. When it is necessary to dry the hair quickly, switch to the direct airflow position 7 and aim the air outlet 22 at the hair to achieve rapid drying. This design has fewer parts and lower cost; there are no additional obstructions in the airflow channel, resulting in low air volume loss and high air output efficiency; the user can operate it with one hand, and the switching is convenient and simple; it is suitable for various air outlet devices such as heaters, hand dryers, ventilation equipment, and hair dryers.

[0041] Specifically, such as Figure 4As shown, the air outlet 22 is provided with several dividing strips 222 extending along the length of the air outlet 22, which divide the air outlet 22 into multiple grilles. By setting the dividing strips 222, on the one hand, the airflow from the air outlet 22 can be divided into multiple fine airflows, making the airflow more uniform and gentle, avoiding the formation of a strong wind column that impacts the user due to excessive airflow concentration, and improving the user's comfort; on the other hand, the dividing strips 222 act as grilles at the air outlet 22, preventing foreign objects from entering the air cavity 23, improving the safety of use, especially suitable for use in families with children or pets; at the same time, the grille structure generates a certain resistance when the airflow passes through, which can appropriately reduce the airflow velocity. When used in conjunction with the wall deflection function, it helps to reduce turbulence and make the wall circulation more stable.

[0042] In one embodiment, the plurality of partition strips 222 are evenly distributed along the air outlet width direction of the air outlet 22, making the air outlet segmentation more uniform. In another embodiment, the cross-section of the partition strips 222 is arc-shaped or airfoil-shaped, which can guide the airflow to flow in a specific direction, further optimizing the consistency of the air outlet direction.

[0043] Specifically, such as Figure 4 and Figure 13 As shown, the air outlet 22 is provided with two inclined surfaces 221, which are symmetrically arranged about the central axis L2 of the air outlet 22; the air direction can be switched by rotating the outer cylinder 1.

[0044] Furthermore, such as Figure 6-9 As shown, the deflection position 6 includes a first deflection position 61 and a second deflection position 62; in the first deflection position 61, one sidewall 111 of the opening 11 is adjacent to one of the two inclined surfaces 221, causing the airflow to deflect in a first direction; in the second deflection position 62, the other sidewall 111 of the opening 11 is adjacent to the other of the two inclined surfaces 221, causing the airflow to deflect in a second direction, which is opposite to the first direction.

[0045] Specifically, the opening 11 is greater than or equal to the air outlet width of the air inlet 21 to ensure that the airflow from the air outlet 22 can be completely discharged outward through the opening 11 when in the direct blowing position 7, so as to avoid the airflow loss caused by being blocked by the cylinder wall of the outer cylinder 1.

[0046] The axial length of the opening 11 is greater than or equal to the axial length of the air outlet 22, so as to ensure that the air outlet 22 can be discharged outward through the opening 11 at all points along its length direction when in the direct blowing position 7, and to avoid uneven airflow or air volume loss caused by the insufficient length of the opening 11 leading to partial blockage of the air outlet 22 by the cylinder wall of the outer cylinder 1.

[0047] In one embodiment, the positioning cylinder 2 is provided with an air outlet 22, and one side of the air outlet 22 is provided with an inclined surface 221, which can only achieve unidirectional deflection air delivery and has the lowest cost.

[0048] In another embodiment, the positioning cylinder 2 is provided with an air outlet 22, and each side of the air outlet 22 is provided with an inclined surface 221. By rotating the outer cylinder 1 in the forward or reverse direction, two opposite directions of wall-mounted deflection air supply can be achieved.

[0049] In another embodiment, the positioning cylinder 2 is provided with two air outlets 22, which are distributed around the circumference of the positioning cylinder 2, and can simultaneously achieve air supply coverage in multiple directions, making it suitable for large-area air supply scenarios.

[0050] In another embodiment, the positioning cylinder 2 is provided with two air outlets 22, and each of the two air outlets 22 is provided with two inclined surfaces 221, which covers the most directions and has the highest flexibility.

[0051] In another embodiment, the positioning cylinder 2 is provided with two air outlets 22, one of which has only one inclined surface 221, and the other has two inclined surfaces 221, thus achieving a balance between structural complexity and functional diversity, while taking into account cost control and multi-directional air supply requirements.

[0052] Specifically, such as Figure 5 and Figure 10-12 As shown, the outer cylinder 1 has a protrusion 14 at the end away from the air inlet 21. The protrusion 14 is striped and distributed along the circumference of the outer cylinder 1. By setting the protrusion 14, the friction between the end of the outer cylinder 1 and the user's hand is increased, making it easier for the user to hold and rotate the outer cylinder 1, making the airflow switching operation more effortless and convenient. At the same time, the striped protrusion 14 is distributed along the circumference and is consistent with the rotation direction, further optimizing the rotation feel and improving the user experience.

[0053] Preferably, such as Figure 14 As shown, the outer peripheral wall of the outer cylinder 1 is provided with a comb tooth row 12, which includes a plurality of comb teeth 121 arranged in an array at intervals along the central axis of the outer cylinder 1. In use, the comb teeth 121 can be used directly to comb hair during blow-drying, allowing for simultaneous blow-drying and combing. The operator installs the accessory in the ventilation device, close to the user's hair, and uses the comb teeth 121 to comb the hair. While combing the hair, the outer cylinder 1 can be adjusted to the deflection position 6. At this time, the hair is attracted by the outer peripheral wall of the outer cylinder 1. Due to the Coanda effect, the hair wraps around the outer peripheral wall of the outer cylinder 1, achieving the effect of blow-drying and combing at the same time. This allows the hot air to act evenly on the hair strands, improving the efficiency of drying and styling. At the same time, the spaced arrangement of the comb teeth 121 can prevent hair from tangling, avoid pulling the hair and causing damage, and improve the comfort and safety of use.

[0054] Furthermore, such as Figure 14 As shown, the comb teeth 12 are arranged in two sets, symmetrically at 180°. When the outer tube 1 rotates to the deflection position 6 to switch the airflow direction, the comb teeth 12, which were originally facing downwards, may deflect due to the rotation of the outer tube 1. However, the two sets of symmetrically arranged comb teeth 12 ensure that no matter which direction the outer tube 1 rotates to the deflection position 6, one set of comb teeth 12 always remains facing downwards and directly towards the hair. The user can directly comb without adjusting the grip angle or finding the comb teeth position, ensuring the normal use of the combing function under different airflow directions. In addition, when switching to the deflection position 6 in another direction, the other set of comb teeth 12 automatically rotates to the downward position, realizing the coordinated linkage between the combing function and the airflow direction switching, further improving the convenience of operation and user experience.

[0055] like Figure 3 and Figure 15 As shown, the positioning cylinder 2 is snapped to the side of the air inlet 21 with an installation part 4. The installation part 4 is connected to a hair dryer or other ventilation equipment. By setting the installation part 4, the air direction switching accessory can be adapted to the shape and size of the air outlet 22 of different ventilation equipment by replacing the installation part 4 of the corresponding specification. There is no need to replace the entire accessory. It has strong versatility and wide applicability.

[0056] Specifically, such as Figure 15 As shown, the mounting component 4 is provided with a snap-fit ​​component 43, and the positioning cylinder 2 is provided with a snap-fit ​​groove 25. The snap-fit ​​component 43 snaps into the snap-fit ​​groove 25, thereby achieving a snap-fit ​​fixed connection between the mounting component 4 and the positioning cylinder 2. Through the cooperation of the snap-fit ​​component 43 and the snap-fit ​​groove 25, the mounting component 4 and the positioning cylinder 2 can be quickly assembled without the need for screws or adhesives, and the connection is firm and reliable. During disassembly, simply press the snap-fit ​​component 43 to disengage it from the snap-fit ​​groove 25, and the mounting component 4 can be removed, facilitating the replacement of mounting components 4 of different specifications to adapt to different ventilation equipment, or for cleaning and maintenance of the inside of the air cavity 23. The snap-fit ​​structure is simple, easy to manufacture, and low in cost, making it suitable for mass production.

[0057] Specifically, such as Figure 3 and Figure 16 As shown, an end cap 3 is rotatably connected to the end of the positioning cylinder 2 away from the air inlet 21. The end cap 3 is used to seal the end of the positioning cylinder 2. In use, the end cap 3 seals the end of the positioning cylinder 2, preventing the airflow entering the air cavity 23 from the air inlet 21 from leaking out from the end. As a result, all the airflow is discharged outward through the air outlet 22, ensuring the air volume and air outlet efficiency of the air outlet 22. At the same time, the end cap 3 can prevent external dust and debris from entering the air cavity 23 from the end, playing a dustproof protection role.

[0058] Specifically, a cavity 24 is provided between the end cap 3 and the positioning cylinder 2, and the outer cylinder 1 includes a connecting part 13, which is inserted into the cavity 24; the mounting member 4 is provided with a first step 41 and a second step 42; during installation, the mounting member 4 is first inserted into the outer periphery of the positioning cylinder 2 from the end of the positioning cylinder 2 near the air inlet 21, so that the end of the positioning cylinder 2 near the air inlet 21 abuts against the second step 42; then the outer cylinder 1 is inserted from the end of the mounting member 4 away from the positioning cylinder 2, so that the end of the outer cylinder 1 passes through the first step 41 and abuts against the first step 41; finally, the end cap 3 is installed on the end of the positioning cylinder 2 away from the air inlet 21, so that the connecting part 13 of the outer cylinder 1 is inserted into the cavity 24.

[0059] After installation, the mounting component 4 abuts against the end of the positioning cylinder 2 via step 2 42, and one end of the outer cylinder 1 is abutted and limited by step 1 41, while the other end is limited by the connection part 13 inserted into the cavity 24 and the end cap 3. This fixes the outer cylinder 1 axially between the mounting component 4 and the end cap 3, allowing it to rotate only relative to the positioning cylinder 2 without axial movement. This ensures that the gap 112 between the side wall 111 and the inclined surface 221 is precisely controllable when the deflection position 6 is reached, and the wall-mounted circulation is stable and reliable. At the same time, the end cap 3 seals the end of the positioning cylinder 2, allowing all the airflow entering from the air inlet 21 to be discharged through the air outlet 22, preventing airflow leakage from the end and ensuring airflow efficiency.

[0060] Specifically, such as Figure 17-18 As shown, the airflow switching accessory also includes an inner cylinder 5, which is disposed inside the positioning cylinder 2 and is inserted into the end cap 3. The inner cylinder 5 has a hollow structure, and its outer peripheral wall has an opening 51 that communicates with the air outlet 22. By rotating the end cap 3, the inner cylinder 5 can be rotated relative to the positioning cylinder 2.

[0061] like Figure 19 As shown, the opening 51 has continuous stepped edges 511 on both sides along the axial direction of the inner cylinder 5. The stepped edges 511 are formed by alternating vertical edges 5111 and horizontal edges 5112, and include at least two vertical edges 5111. The vertical edges 5111 extend circumferentially along the inner cylinder 5, and the circumferential width of the vertical edges 5111 is equal to the circumferential width of the air outlet 22; the horizontal edges 5112 extend axially along the inner cylinder 5.

[0062] like Figures 19-20As shown, when the end cap 3 is rotated and the inner cylinder 5 is rotated, different axial length segments of the opening 51 are sequentially aligned with the air outlet 22. Due to the presence of the stepped edge 511, when the vertical edge 5111 is aligned with the air outlet 22, airflow can be discharged outward through the opening 51 and the air outlet 22; while when the horizontal edge 5112 is aligned with the air outlet 22, the horizontal edge 5112 blocks the air outlet 22, and no airflow is emitted from this part. Therefore, as the inner cylinder 5 rotates, the effective air outlet area of ​​the air outlet 22 increases or decreases in a stepped manner, thereby realizing stepless or stepped adjustment of multiple air volumes to meet the air volume requirements of different usage scenarios. At the same time, there is no need to set up an additional independent air adjustment structure, which is compact, low-cost, and intuitive to operate.

[0063] The working principle of the present invention will be explained in detail below; The airflow direction switching accessory of the present invention includes an outer cylinder 1 and a positioning cylinder 2. The positioning cylinder 2 is provided with an air inlet 21, an air outlet 22, and an air cavity 23. The air outlet 22 is disposed on the outer peripheral wall of the positioning cylinder 2. The outer cylinder 1 is rotatably sleeved on the outside of the positioning cylinder 2 and has an opening 11. In use, the outer cylinder 1 is rotated to the deflection position 6. The side wall 111 of the opening 11 is adjacent to the inclined surface 221 of the air outlet 22, forming a gap 112 between them. The airflow flowing out of the air outlet 22 is guided to the outer peripheral wall surface of the positioning cylinder 2 through the gap 112. Based on the Coanda effect, the airflow is adsorbed on the outer peripheral wall surface of the positioning cylinder 2 and flows along its surface, thereby changing the original airflow direction and realizing the wall-attached deflection of the airflow direction. The outer cylinder 1 is rotated to the direct blowing position 7. The opening 11 is aligned with the air outlet 22, and the air outlet 22 is exposed in the opening 11. The airflow is discharged in a straight line along the original radial direction through the opening 11, realizing direct blowing.

[0064] The innovation of this invention lies in the fact that only an opening is made on the outer cylinder and a slope is set at the air outlet. There is no need for additional independent air guiding components such as wind deflectors, wind baffles, louvers or control valves. The air direction can be switched by a single rotation action, which effectively reduces the number of parts and assembly steps and lowers the manufacturing cost. There are no additional parts extending into the air cavity or air outlet in the entire airflow channel. The airflow is not subject to additional obstruction during the switching process. Compared with the traditional air guiding structure, the air volume loss is significantly reduced and the air outlet efficiency is high. Unlike the traditional mechanical obstruction air guiding principle, this invention uses the Coanda effect to guide the airflow to the outer peripheral wall surface of the positioning cylinder and flow along the wall, so as to achieve smooth deflection of the air direction and avoid turbulence and energy loss caused by the airflow hitting the baffle. When the double slopes are symmetrically set on both sides of the air outlet, by rotating the outer cylinder in the forward or reverse direction, the two side walls of the opening cooperate with the two slopes respectively, so as to achieve two opposite directions of wall-attached deflection air delivery. The user can complete the switching with one hand rotation, which is intuitive and convenient.

[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 wind direction switching accessory, characterized in that, include: The positioning cylinder (2) includes a wind cavity (23), an air inlet (21) and an air outlet (22) communicating with the wind cavity (23). The air outlet (22) is located on the outer peripheral wall of the positioning cylinder (2) and its length extension direction is parallel to the central axis L1 direction of the positioning cylinder (2). The outer cylinder (1) is rotatably connected to the positioning cylinder (2) and has at least a deflection position (6) and a direct blowing position (7). The outer peripheral wall of the outer cylinder (1) has an opening (11) along the axial extension direction. The air outlet (22) is provided with at least one inclined surface (221), and the opening (11) includes a side wall (111). At the deflection position (6), the sidewall (111) of the opening (11) and the inclined surface (221) are adjacent to each other in the circumferential direction of the positioning cylinder (2), and a gap (112) is formed between the sidewall (111) and the inclined surface (221). The gap (112) is used to guide the airflow to the outer peripheral wall surface of the positioning cylinder (2) so that the airflow flows along the outer peripheral wall surface. In the direct blowing position (7), a direct air passage is formed between the opening (11) and the air outlet (22), so that the airflow is directly discharged outward through the opening (11).

2. The wind direction switching accessory according to claim 1, characterized in that, Two inclined surfaces (221) are provided, and the two inclined surfaces (221) are respectively arranged on both sides of the circumference of the air outlet (22) and are symmetrically arranged about the central axis L2 of the air outlet (22).

3. The wind direction switching accessory according to claim 2, characterized in that, The deflection position (6) includes a first deflection position (61) and a second deflection position (62); in the first deflection position (61), one side wall (111) of the opening (11) is adjacent to one of the two inclined surfaces (221), causing the airflow to deflect in a first direction; in the second deflection position (62), the other side wall (111) of the opening (11) is adjacent to the other of the two inclined surfaces (221), causing the airflow to deflect in a second direction, which is opposite to the first direction.

4. The wind direction switching accessory according to claim 3, characterized in that, The circumferential width of the opening (11) is greater than or equal to the circumferential air outlet width of the air outlet (22); the axial length of the opening (11) is greater than or equal to the axial length of the air outlet (22).

5. A wind direction switching accessory according to claim 1, characterized in that, The air outlet (22) is provided, and the inclined surface (221) is provided on one side of the air outlet (22) or the inclined surface (221) is provided on both sides of the air outlet (22).

6. The wind direction switching accessory according to claim 1, characterized in that, There are two air outlets (22), and the two air outlets (22) are distributed around the circumference of the positioning cylinder (2); each air outlet (22) has one or two inclined surfaces (221).

7. A wind direction switching accessory according to claim 1, characterized in that, The outer cylinder (1) has a protrusion (14) at the end away from the air inlet (21). The protrusion (14) is distributed along the circumference of the outer cylinder (1) to facilitate the rotation of the outer cylinder (1).

8. A wind direction switching accessory according to claim 7, characterized in that, The outer peripheral wall of the outer cylinder (1) is provided with a comb tooth row (12), the comb tooth row (12) includes a number of comb teeth (121) spaced apart along the axial direction of the outer cylinder (1); the comb tooth row (12) is provided in two sets and is symmetrically arranged at 180°.

9. A wind direction switching accessory according to claim 1, characterized in that, The air outlet (22) is provided with several dividing strips (222) extending along its length, and the dividing strips (222) divide the air outlet (22) into multiple grilles.

10. A wind direction switching accessory according to claim 1, characterized in that, The positioning cylinder (2) has a detachable mounting component (4) at one end near the air inlet (21), which is used to connect to external ventilation equipment.

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