Air duct system applied to hair straightening device

Abstract

Provided is an air duct system applied to a hair straightening device, relating to the technical field of hair straightening devices. The air duct system includes a main body. There is a main flow channel and two branch flow channels connected to the main flow channel inside the main body. The main body has two hair straightening walls that cooperate with each other at intervals. A hair straightening space that is used to straighten or dry hair is formed between the two hair straightening walls. A main flow channel and two branch flow channels that are connected to the main flow channel are disposed inside the main body. The two branch flow channels are disposed along length directions of the two hair straightening walls. A plurality of oblique air outlets are disposed on the hair straightening wall along a length direction of the hair straightening wall.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of hair straightening devices, in particular to an air duct system applied to a hair straightening device.BACKGROUND

[0002] In the hairdressing field, hair straighteners, as common hair styling tools, straighten hair by using high-temperature heating. However, a high-temperature heating process is prone to cause irreversible damage to hair, such as hair protein denaturation and water loss, resulting in dryness and bifurcation of hair to seriously affect hair health.

[0003] To solve the foregoing problem, a hair straightening device with a publication patent number of CN222787217U is proposed in the prior art. The hair straightening device is provided with a guide oblique plane in a working channel. When an air flow in the working chamber flows out through the oblique air outlet, the air flow flows in the working channel under the guidance of the guide oblique plane. A speed and heat of the air flow are used to effectively dry and straighten hair, thereby reducing direct damage to hair caused by high temperature to a certain extent.

[0004] However, when a hair straightening device similar to this structure is actually used, it is found that there is an obvious defect in a structural design that the plurality of oblique air outlets are formed in the hair straightening device by disposing a plurality of guide plates. Specifically, hot air cannot be evenly applied to each oblique air outlet in the working chamber of the hair straightening device, and more hot air is blown excessively intensively to the oblique air outlet near a front end of the working chamber, and the hot air cannot be evenly applied to the working channel, a drying and straightening effect on hair is greatly reduced, and a dual requirement of a user for an ideal hair straightening effect and hair care is difficult to be met. Therefore, an improved technical solution needs to be proposed to solve the foregoing problem.SUMMARY

[0005] In order to overcome the foregoing disadvantages, the present disclosure aims to provide a technical solution capable of solving the foregoing problem.

[0006] An air duct system applied to a hair straightening device includes a main body. There is a main flow channel and two branch flow channels connected to the main flow channel inside the main body. The main body has two hair straightening walls that cooperate with each other at intervals. A hair straightening space that is used to straighten or dry hair is formed between the two hair straightening walls. A main flow channel and two branch flow channels that are connected to the main flow channel are disposed inside the main body. The two branch flow channels are disposed along length directions of the two hair straightening walls. A strip-shaped oblique air outlet is disposed on the hair straightening wall along a length direction of the hair straightening wall. The hair straightening space is connected to the branch flow channel by using the oblique air outlet. An air inlet connected to the main flow channel is disposed on the air inlet main body, so that the main body is able to form a directional fluid that enters from the air inlet and passes through the main flow channel and the branch flow channel, and then blows from the oblique air outlet to the hair straightening space. A wavy structure corresponding to the oblique air outlet is formed on a wall surface on one side that is of the hair straightening wall and that corresponds to the branch flow channel. The wavy structure and the oblique air outlet are in an arc-plane transition structure. A cross-sectional area of the branch flow channel from one end connected to the main flow channel to a tail end of the branch flow channel gradually decreases, and a longitudinal dimension of the wavy structure gradually decreases as the cross-sectional area of the branch flow channel gradually decreases.

[0007] Compared with the prior art, the present disclosure has the following beneficial effects.

[0008] By using the design in which the cross-sectional area of the branch flow channel gradually decreases and the dimension of the wavy structure decreases, heat can be gathered in the wavy structure and is guided to flow toward the oblique air outlet to a greater extent, thereby effectively overcoming the problem that hot air of a conventional air duct is nonuniform in distribution, and ensuring that the hot air is uniformly blown out from each oblique air outlet. In addition, the arrangement of the wavy structure enables heat to be deposited on a recessed side of the wavy structure when passing through the wavy structure, so that heat congregation of the branch flow channel on the side of the air outlet surface is improved to a certain extent and then indirectly acts on hair in the hair straightening space. Therefore, hair is better dried, and the efficiency is improved. In addition, hair can be better protected to a certain extent, a hairdressing effect and hair health are considered, and a better hair straightening styling experience is brought to a user.

[0009] The additional aspects and advantages of the present disclosure will be set forth partially in the following description, and will be apparent from the following description, or learned through the practice of the present disclosure.BRIEF DESCRIPTION OF THE DRAWINGS

[0010] To describe the technical solutions in the embodiments of the present disclosure or in the prior art more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show some embodiments of the present disclosure, and a person of ordinary skill in the art may still derive other accompanying drawings from these accompanying drawings without creative efforts.

[0011] FIG. 1 is a structural schematic diagram according to Embodiment 1 of the present disclosure;

[0012] FIG. 2 is a planar structural schematic diagram of a longitudinal cross section according to Embodiment 1 of the present disclosure;

[0013] FIG. 3 is a structural schematic diagram of part A in FIG. 2 according to the present disclosure;

[0014] FIG. 4 is a spatial structural schematic diagram of a longitudinal cross section according to Embodiment 1 of the present disclosure;

[0015] FIG. 5 is a structural schematic diagram of part B in FIG. 4 according to the present disclosure;

[0016] FIG. 6 is a planar structural schematic diagram of a transverse cross section according to Embodiment 1 of the present disclosure;

[0017] FIG. 7 is a spatial structural schematic diagram of a transverse cross section according to Embodiment 1 of the present disclosure;

[0018] FIG. 8 is a structural schematic diagram of two implementations in which two wavy structures are distributed according to Embodiment 1 of the present disclosure;

[0019] FIG. 9 is an effect drawing of fluid flow according to Embodiment 1 of the present disclosure;

[0020] FIG. 10 is an effect drawing of fluid flow guided by using an arc-plane lifting structure according to Embodiment 1 of the present disclosure;

[0021] FIG. 11 is another effect drawing of fluid flow according to Embodiment 1 of the present disclosure;

[0022] FIG. 12 is a structural schematic diagram of a longitudinal cross section according to Embodiment 2 of the present disclosure;

[0023] FIG. 13 is a structural schematic diagram of part C in FIG. 12 according to the present disclosure;

[0024] FIG. 14 is a structural schematic diagram of a transverse cross section according to Embodiment 2 of the present disclosure;

[0025] FIG. 15 is a structural schematic diagram of a local section according to Embodiment 2 of the present disclosure;

[0026] FIG. 16 is a structural schematic diagram of part D in FIG. 15 according to the present disclosure;

[0027] FIG. 17 is a structural schematic diagram of a local section according to Embodiment 3 of the present disclosure; and

[0028] FIG. 18 is a structural schematic diagram of part E in FIG. 17 according to the present disclosure.REFERENCE SIGNS AND NAMES IN THE ACCOMPANYING DRAWINGS10: main body; 11: main flow channel; 12: branch flow channel; 13: air inlet; 14: shunting structure; 20: hair straightening wall; 21: hair straightening space; 22: oblique air outlet; 220: oblique air outlet hole; 221: transition section; 222: oblique section; 23: wavy structure; 231: protruding portion; 232: recessed portion; 24: first partition portion; 25: second partition portion; 251: expansion portion; 252: sheet portion; and 26: arc-shaped sheet.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art on the basis of the embodiments of the present disclosure without requiring the exercise of inventive effort fall within the scope of protection of the present disclosure.

[0031] In the description of the embodiments, it needs to be illustrated that the indicative direction or position relations of the terms such as “central”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are direction or position relations illustrated based on the accompanying drawings, just for facilitating the description of the present disclosure, but not for indicating or hinting that the indicated device or element must be in a specific direction and is constructed and operated in the specific direction, the terms cannot be understood as the restriction of the present disclosure.

[0032] Referring to FIG. 1 to FIG. 10, in the embodiments of the present disclosure, an air duct system applied to a hair straightening device includes a main body 10. The main body 10 has two hair straightening walls 20 that cooperate with each other at intervals. A hair straightening space 21 that is used to straighten or dry hair is formed between the two hair straightening walls 20. A main flow channel 11 and two branch flow channels 12 that are connected to the main flow channel 11 are disposed inside the main body 10. The two branch flow channels 12 are disposed along length directions of the two hair straightening walls 20. A strip-shaped oblique air outlet 22 is disposed on the hair straightening wall 20 along a length direction of the hair straightening wall 20. The hair straightening space 21 is connected to the branch flow channel 12 by using the oblique air outlet 22. An air inlet 13 connected to the main flow channel 11 is disposed on the air inlet main body 10, so that the main body 10 is able to form a directional fluid that enters from the air inlet 13 and passes through the main flow channel 11 and the branch flow channel 12, and then blows from the oblique air outlet 22 to the hair straightening space 21. A wavy structure 23 corresponding to the oblique air outlet 22 is formed on a wall surface on one side that is of the hair straightening wall 20 and that corresponds to the branch flow channel 12. The wavy structure 23 and the oblique air outlet 22 are in an arc-plane transition structure. A cross-sectional area of the branch flow channel 12 from one end connected to the main flow channel 11 to a tail end of the branch flow channel 12 gradually decreases, and a longitudinal dimension of the wavy structure 23 gradually decreases as the cross-sectional area of the branch flow channel 12 gradually decreases.

[0033] In the air duct system of the hair straightening device, the air inlet 13 of the main body 10 is connected to an air supply device to obtain hot air. The hot air flows through the main flow channel 11 in sequence and is shunted to the two branch flow channels 12 that extend in a longitudinal direction of the hair straightening wall 20. The cross-sectional area of the branch flow channel 12 is designed to gradually decrease from a joint of the main flow channel 11 to a front end of the main flow channel 11, so that a speed of the hot air continuously increases in a flow process, and pressure distribution is more uniform. After the hot air enters the branch flow channel 12, the hot air is blown to the hair straightening space 21 at a tilt angle by using the oblique air outlet 22 disposed along a length direction on the hair straightening wall 20, so that hair placed in the hair straightening space 21 can be blown out to one side. In addition, the wavy structure 23 that is of the hair straightening wall 20 and that corresponds to one side wall surface of the branch flow channel is in arc-plane transition with the oblique air outlet 22, which can effectively guide a fluid flowing in a length direction in the branch flow channel 12, so that the wavy structure 23 smoothly changes a flow direction, and accurately faces the oblique air outlet 22. This design fully utilizes a Coanda effect, so that the fluid clings to a surface to flow under an arc-plane effect, so as to avoid turbulence or wind resistance due to a suddenly changing flow direction, and ensure that the hot air blows out from the oblique air outlet 22 in a stable and uniform state. The wavy structure 23 ingeniously guides a flow direction of an air flow by using the Coanda effect, and a dimension of the wavy structure 23 is matched with a trend that the cross-sectional area of the branch flow channel 12 decreases. Specifically, the branch flow channel 12 has an air outlet surface as a wall surface of the hair straightening wall 20, upper and lower side surfaces that are connected to the air outlet surface, an opposite surface relative to the air outlet surface, and a tail end surface located at the tail end of the branch flow channel 12. Two side surfaces of the branch flow channel 12 are disposed in a structure that approaches to a middle part gradually from an end connected to the main flow channel 11 to a front end of the branch flow channel 12, so that a length of the wavy structure 23 gradually decreases as the cross-sectional area of the branch flow channel 12 gradually decreases. This design makes the wavy structure 23 near the main flow channel 11 have a stronger drainage effect, and effectively avoids a shortage of air at the oblique air outlet 22 here, so as to smoothly and evenly flow the hot air to the hair straightening space 21 through the oblique air outlet 22, and dry and straighten the hair.

[0034] Therefore, on the one hand, a coordinative design in which the cross-sectional area of the branch flow channel 12 is gradually changed and the dimension of the wavy structure 23 decreases effectively solves a problem that the hot air is concentrated at the front-end air outlet in a conventional structure, so that the hot air is indirectly and evenly distributed in the entire hair straightening space 21, thereby greatly improving a drying and straightening effect, ensuring that each part of the hair is uniformly heated, and meeting a requirement of a user for an ideal hair straightening effect. On the other hand, an arc-plane transition and a heat deposition function between the wavy structure 23 and the oblique air outlet 22 reduce direct damage to hair caused by a high temperature. In combination with uniform hot air distribution, hair care is considered during styling, thereby implementing dual effects of hairdressing and hair care, and improving user experience.

[0035] To further describe a function of the technical solution, the following is further described by taking three embodiments as examples.Embodiment 1

[0036] Referring to FIG. 1 to FIG. 11, the wavy structure 23 has a plurality of strip-shaped protruding portions 231 and recessed portions 232 that are disposed in staggered arrangement, and the protruding portion 231 and the recessed portion 232 that are adjacent are in arc-plane transition. This structure is designed so that when the air flow flows in the branch flow channel 12, the air flow can be in smooth transition along an arc surface, so as to reduce air flow resistance, and avoid from forming a vortex of the air flow at a turning position, thereby ensuring smooth flow of the air flow, and further improving uniformity of the hot air in the branch flow channel 12.

[0037] Further, there are two wavy structures 23, and the two wavy structures 23 are respectively distributed between the oblique air outlet 22 and an upper side surface of the branch flow channel 12 and between the oblique air outlet 22 and a lower side surface of the branch flow channel 12. As shown in FIG. 8a, the protruding portions 231 of the two wavy structures 23 are connected to each other, and the recessed portions 232 of the two wavy structures 23 are connected to each other; or, as shown in FIG. 8b, the protruding portions 231 of the two wavy structures 23 are staggered and distributed mutually, and the recessed portions 232 of the two wavy structures 23 are staggered and distributed mutually. When the protruding portions 231 are connected to each other and the recessed portions 232 are connected to each other, a continuous flow path can be formed, and a guiding effect on the air flow can be enhanced, so that the air flow flows more intensively to the oblique air outlet 22. When the protruding portions 231 and the recessed portions 232 are staggered and distributed mutually, a flow track of the air flow may be further disrupted, and the air flow is fully mixed in the branch flow channel 12, so that the air flow flows out from the oblique air outlet 22 more evenly, and an action effect on hair is improved.

[0038] Further, the oblique air outlet 22 is disposed on a middle part, a lower part or an upper part of the hair straightening wall 20. This flexible setting manner can meet a hair styling requirement of different lengths and locations. Regardless of processing hair of a head top, a middle part, or a hair end, hot air can be accurately applied to a target area, thereby improving applicability of the hair straightening device.

[0039] Further, at least one side surface of the branch flow channel 12 is disposed in a structure that approaches to the oblique air outlet 22 gradually from an end connected to the main flow channel 11 to a tail end surface of the branch flow channel 12, so that lengths of the protruding portion 231 and the recessed portion 232 gradually decrease as the cross-sectional area of the branch flow channel 12 gradually decreases. This design is matched with an overall trend that the cross-sectional area of the branch flow channel 12 gradually decreases, so that it can be ensured that the wavy structure 23 can adapt to the air flow state at all locations of the branch flow channel 12, so as to continuously guide the air flow, ensure uniform distribution of the hot air, and avoid a case in which local hot air is excessively strong or excessively weak.

[0040] Further, the oblique air outlet 22 has a transition section 221 normally in abutting joint with the branch flow channel 12 and an oblique section 222 obliquely in butting joint with the hair straightening space 21, and there is an included angle of 20° to 60° between the oblique section 222 and a wall surface of the hair straightening wall 20. The arrangement of the transition section 221 enables the air flow to smoothly enter the oblique air outlet 22 from the branch flow channel 12, thereby reducing an air flow loss. However, the oblique angle is designed at 20° to 60°, which can ensure that the hot air blows to hair in the hair straightening space 21 at a proper angle, thereby enhancing a straightening effect on the hair, avoiding excessive impact on the hair due to hot air dispersion caused by too large angle or too small angle, and considering hair care while improving the styling effect.

[0041] Further, the oblique air outlet 22 has a plurality of oblique air outlet holes 220. There is a first partition portion 24 as a part of the wavy structure 23 between two adjacent oblique air outlet holes 220, so that the wavy structure 23 and a corresponding oblique air outlet hole 220 are in an arc-plane transition structure. The first partition portion 24 serves not only to partition the oblique air outlet holes 220, but also can further guide the air flow to be uniformly blown out from the oblique air outlet holes 220 as a part of the wavy structure 23, so as to avoid that the hot air is excessively concentrated at the oblique air outlet 22. In addition, the arc-plane transition structure further reduces the air flow resistance, thereby ensuring smooth output of the air flow.

[0042] Further, a shunting structure 14 is disposed at a position between a main flow channel 11 and the two branch flow channels 12, and the shunting structure 14 and the first wavy structure 23 of the branch flow channel 12 are in an arc-plane transition structure. The shunting structure 14 can evenly distribute the air flow in the main flow channel 11 into the two branch flow channels 12, and the arc-plane transition structure ensures smooth transition of the air flow from the main flow channel 11 to the branch flow channel 12, thereby avoiding an air flow disorder at the shunting position, ensuring air flow uniformity at an initial section of the branch flow channel 12, and establishing a good basis for uniform distribution of subsequent hot air in the entire branch flow channel 12.Embodiment 2

[0043] Referring to FIG. 12 to FIG. 16, in this embodiment, the wavy structure 23 has a plurality of strip-shaped protruding portions 231 and recessed portions 232 that are disposed in staggered arrangement, and the protruding portion 231 and the recessed portion 232 that are adjacent are in arc-plane transition. This structure enables the air flow to flow smoothly along the arc plane in the branch flow channel 12, which reduces resistance and disorder generated by the air flow impact, so that the air flow is guided to the oblique air outlet 22 more smoothly to lay a foundation for uniform distribution of the hot air.

[0044] Further, there is only one wavy structure 23, and the only one wavy structure 23 is distributed between the oblique air outlet 22 and an upper side of the branch flow channel 12 or between the oblique air outlet 22 and a lower side surface of the branch flow channel 12. The design of the single wavy structure simplifies the internal structure of the air duct system, and reduces the complexity and costs of production and manufacture while ensuring the guiding effect of the air flow. Moreover, the air flow on one side can be directed to be guided based on actual air flow characteristics, so that air flow guidance is more accurate.

[0045] Further, the oblique air outlet 22 is disposed on a middle part, a lower part or an upper part of the hair straightening wall 20. Such arrangement may meet a requirement of different users for styling different parts of hair. Regardless of processing middle hair to create a natural hair straightening effect, or performing fine straightening on a lower hair end, or shaping upper hair, hot air can be accurately applied to a target area, thereby improving the practicality of the device.

[0046] Further, at least one side surface of the branch flow channel 12 is disposed in a structure that approaches to the oblique air outlet 22 gradually from an end connected to the main flow channel 11 to a tail end surface of the branch flow channel 12, so that lengths of the protruding portion 231 and the recessed portion 232 gradually decrease as the cross-sectional area of the branch flow channel 12 gradually decreases. The design adapts to the change of the cross-sectional area of the branch flow channel 12. In different locations of the branch flow channel 12, the guiding strength of the air flow can be adjusted by changing the length of the wavy structure 23, so as to ensure that the air flow is always evenly distributed in a flow process, and avoid a case in which the air flow is concentrated or insufficient due to a small cross-sectional area at the end of the branch flow channel 12.

[0047] Further, the oblique air outlet 22 has a transition section 221 normally in abutting joint with the branch flow channel 12 and an oblique section 222 obliquely in butting joint with the hair straightening space 21, and there is an included angle of 20° to 60° between the oblique section 222 and a wall surface of the hair straightening wall 20. The transition section 221 enables the air flow to smoothly enter the oblique air outlet 22 from the branch flow channel 12, thereby reducing an energy loss. The oblique angle of 20° to 60° can make the hot air blow to hair at a proper angle, which ensures a straightening effect, cannot cause excessive damage to the hair due to an improper angle, and balances styling and hair care.

[0048] Further, the oblique air outlet 22 has a plurality of oblique air outlet holes 220. There is a second partition portion 25 between two adjacent oblique air outlet holes 220. The second partition portion 25 has an expansion portion 251 connected to the wavy structure 23 and a sheet portion 252 formed on the expansion portion 251 and extending to the oblique section 222. The expansion portion 251 and the sheet portion 252 are in arc-plane transition. The expansion part 251 can receive the air flow guided by the wavy structure 23. The air flow is in smooth transition to the sheet portion 252, and then guided to the oblique air outlet hole 220 from the sheet portion 252. The arc-plane transition further reduces the air flow resistance, so that each oblique air outlet hole 220 can obtain a uniform air flow, an overall air outlet effect is improved, and each part of the hair is heated and stressed more uniformly.Embodiment 3

[0049] Referring to FIG. 17 and FIG. 18, the wavy structure 23 has a plurality of strip-shaped protruding portions 231 and recessed portions 232 that are disposed in staggered arrangement, and the protruding portion 231 and recessed portion 232 that are adjacent are in arc-plane transition. This arc-plane transition design can enable the air flow to flow more smoothly in the branch flow channel 12, which reduces a resistance of the air flow to flow between the protruding portion 231 and the recessed portion 232, and avoids a turbulent flow, thereby providing basic guarantee for uniform distribution of the air flow, so that hot air can flow more stably to the oblique air outlet 22.

[0050] There is only one wavy structure 23, and the only one wavy structure 23 is distributed between the oblique air outlet 22 and an upper side of the branch flow channel 12 or between the oblique air outlet 22 and a lower side surface of the branch flow channel 12. The arrangement of the single wavy structure simplifies the structural layout of the air duct system, and reduces the difficulty and costs of production and processing while ensuring an effective guiding effect of the air flow. In addition, air flow guidance is performed on one side, and can be adjusted and controlled more accurately based on a flow characteristic of the air flow in the branch flow channel 12, so that the air flow flows in an expected direction, and orientation and effectiveness of the air flow guidance are improved.

[0051] The oblique air outlet 22 is disposed on a middle part, a lower part or an upper part of the hair straightening wall 20. Such design can meet a requirement of the user for styling different parts of hair. Regardless of integrally straightening middle hair to create a neat hair style, or performing fine processing on a lower hair end to create a smooth hair end, or shaping upper hair to strengthen a third dimension of the hair style, the hot air can be accurately applied to a target area, thereby enlarging the application scope of the hair straightening device and improving the practicability of the hair straightening device.

[0052] At least one side surface of the branch flow channel 12 is disposed in a structure that approaches to the oblique air outlet 22 gradually from an end connected to the main flow channel 11 to a tail end surface of the branch flow channel 12, so that lengths of the protruding portion 231 and the recessed portion 232 gradually decrease as the cross-sectional area of the branch flow channel 12 gradually decreases. This design is consistent with a change trend of the cross-sectional area of the branch flow channel 12. With a gradual decrease of the cross-sectional area of the branch flow channel 12, lengths of the protruding portion 231 and the recessed portion 232 also correspondingly decrease, and guiding force for the air flow can be dynamically adjusted, so as to ensure that the air flow can be evenly guided and distributed at all locations of the branch flow channel 12, thereby avoiding a problem that the air flow of the branch flow channel 12 is concentrated or insufficient due to a decrease in a tail end space of the branch flow channel 12, and ensuring stability of air flow output.

[0053] The oblique air outlet 22 has a transition section 221 normally in abutting joint with the branch flow channel 12 and an oblique section 222 obliquely in butting joint with the hair straightening space 21. The transition section 221 can enable the air flow flowing out from the branch flow channel 12 to smoothly enter the oblique air outlet 22, thereby reducing an energy loss of the air flow when entering the oblique air outlet 22, and ensuring strength of the air flow. However, the oblique section 222 can enable the air flow to blow to the hair in the hair straightening space 21 at a proper angle, thereby enhancing an effect on the hair, and helping to implement purposes of drying and straightening the hair more efficiently.

[0054] The oblique air outlet 22 has a plurality of oblique air outlet holes 220. There is an arc-shaped sheet 26 in abutting joint with the wavy structure 23 between two adjacent oblique air outlet holes 220. The arc-shaped sheet 26 protrudes out of an air outlet surface of the branch flow channel 12. The wavy structure 23 and the corresponding oblique air outlet 22 are in an arc-plane transition structure by using the arc-shaped sheet 26. An outer side surface of the arc-shaped sheet 26 faces the air inlet 13 and is correspondingly disposed between two adjacent wavy structures 23. The arrangement of the arc-shaped sheet 26 further optimizes transition between the wavy structure 23 and the oblique air outlet 22, so that when the air flow flows from the wavy structure 23 to the oblique air outlet 22, the air flow resistance is reduced. In addition, the arc-shaped sheet 26 protrudes out of the air outlet surface of the branch flow channel 12, and the outer side surface of the arc-shaped sheet 26 faces the air inlet 13, so that more air flow can be guided between two adjacent wavy structures 23, and then evenly distributed to each oblique air outlet hole 220, thereby effectively improving distribution uniformity of the hot air at the oblique air outlet 22 so that each part of the hair can be subjected to a uniform hot air effect, and improving a hair straightening effect and a hare care effect.

[0055] For those skilled in the art, obviously the present disclosure is not limited to the details of the exemplary embodiment, and the present disclosure can be achieved in other specific forms without departing from the spirit or essential characteristics of the present disclosure. Therefore, for every point, the embodiments should be regarded as exemplary embodiments and are unrestrictive, the scope of the present disclosure is restricted by the claims appended hereto, and therefore, all changes, including the meanings and scopes of equivalent elements, of the claims are aimed to be included in the present disclosure.

Claims

1. An air duct system applied to a hair straightening device, comprising a main body (10), wherein the main body (10) has two hair straightening walls (20) that cooperate with each other at intervals, a hair straightening space (21) that is used to straighten or dry hair is formed between the two hair straightening walls (20), a main flow channel (11) and two branch flow channels (12) that are connected to the main flow channel (11) are disposed inside the main body (10), the two branch flow channels (12) are disposed along length directions of the two hair straightening walls (20), a strip-shaped oblique air outlet (22) is disposed on the hair straightening wall (20) along a length direction of the hair straightening wall (20), and the hair straightening space (21) is connected to the branch flow channel (12) by using the oblique air outlet (22); an air inlet (13) connected to the main flow channel (11) is disposed on the air inlet main body (10), so that the main body (10) is able to form a directional fluid that enters from the air inlet (13) and passes through the main flow channel (11) and the branch flow channel (12), and then blows from the oblique air outlet (22) to the hair straightening space (21); a wavy structure (23) corresponding to the oblique air outlet (22) is formed on a wall surface on one side that is of the hair straightening wall (20) and that corresponds to the branch flow channel (12), and the wavy structure (23) and the oblique air outlet (22) are in an arc-plane transition structure; and a cross-sectional area of the branch flow channel (12) from one end connected to the main flow channel (11) to a tail end of the branch flow channel (12) gradually decreases, and a longitudinal dimension of the wavy structure (23) gradually decreases as the cross-sectional area of the branch flow channel (12) gradually decreases.

2. The air duct system applied to a hair straightening device according to claim 1, wherein the branch flow channel (12) has an air outlet surface as a wall surface of the hair straightening wall (20), upper and lower side surfaces that are connected to the air outlet surface, an opposite surface relative to the air outlet surface, and a tail end surface located at the tail end of the branch flow channel (12).

3. The air duct system applied to a hair straightening device according to claim 2, wherein the wavy structure (23) has a plurality of strip-shaped protruding portions (231) and recessed portions (232) that are disposed in staggered arrangement, and the protruding portion (231) and recessed portion (232) that are adjacent are in arc-plane transition.

4. The air duct system applied to a hair straightening device according to claim 3, whereinthere are two wavy structures (23), and the two wavy structures (23) are respectively distributed between the oblique air outlet (22) and an upper side surface of the branch flow channel (12) and between the oblique air outlet (22) and a lower side surface of the branch flow channel (12); or,there is only one wavy structure (23), and the only one wavy structure (23) is distributed between the oblique air outlet (22) and an upper side of the branch flow channel (12) or between the oblique air outlet (22) and a lower side surface of the branch flow channel (12).

5. The air duct system applied to a hair straightening device according to claim 4, wherein there are two wavy structures (23), and the two wavy structures (23) are respectively distributed between the oblique air outlet (22) and the upper side surface of the branch flow channel (12) and between the oblique air outlet (22) and the lower side surface of the branch flow channel (12); whereinthe protruding portions (231) of the two wavy structures (23) are connected to each other, and the recessed portions (232) of the two wavy structures (23) are connected to each other; orthe protruding portions (231) of the two wavy structures (23) are staggered and distributed mutually, and the recessed portions (232) of the two wavy structures (23) are staggered and distributed mutually.

6. The air duct system applied to a hair straightening device according to claim 5, wherein the oblique air outlet (22) is disposed on a middle part, a lower part or an upper part of the hair straightening device (20).

7. The air duct system applied to a hair straightening device according to claim 5, wherein there is an included angle of 90° to 180° between the two wavy structures (23).

8. The air duct system applied to a hair straightening device according to claim 4, wherein at least one side surface of the branch flow channel (12) is disposed in a structure that approaches to the oblique air outlet (22) gradually from an end connected to the main flow channel (11) to a tail end surface of the branch flow channel (12), so that lengths of the protruding portion (231) and the recessed portion (232) gradually decrease as the cross-sectional area of the branch flow channel (12) gradually decreases.

9. The air duct system applied to a hair straightening device according to claim 1, wherein the oblique air outlet (22) has a transition section (221) normally in abutting joint with the branch flow channel (12) and an oblique section (222) obliquely in butting joint with the hair straightening space (21).

10. The air duct system applied to a hair straightening device according to claim 9, wherein there is an included angle of 20° to 60° between the oblique section (222) and a wall surface of the hair straightening wall (20).

11. The air duct system applied to a hair straightening device according to claim 9, whereinthe oblique air outlet (22) has a plurality of oblique air outlet holes (220); whereinthere is a first partition portion (24) as a part of the wavy structure (23) between two adjacent oblique air outlet holes (220), so that the wavy structure (23) and a corresponding oblique air outlet hole (220) are in an arc-plane transition structure; the first partition portion (24) is located in the transition section (221), so that the oblique sections (222) of the strip-shaped oblique air outlet holes (220) are connected to each other; orthere is a second partition portion (25) between two adjacent oblique air outlet holes (220), the second partition portion (25) has an expansion portion (251) connected to the wavy structure (23) and a sheet portion (252) formed on the expansion portion (251) and extending to the oblique section (222), and the expansion portion (251) and the sheet portion (252) are in arc-plane transition; orthere is an arc-shaped sheet (26) in abutting joint with the wavy structure (23) between two adjacent oblique air outlet holes (220), the arc-shaped sheet (26) protrudes out of an air outlet surface of the branch flow channel (12), the wavy structure (23) and the corresponding oblique air outlet (22) are in an arc-plane transition structure by using the arc-shaped sheet (26), and an outer side surface of the arc-shaped sheet (26) faces the air inlet (13) and is correspondingly disposed between two adjacent wavy structures (23).

12. The air duct system applied to a hair straightening device according to claim 1, wherein a shunting structure (14) is disposed at a position between the main flow channel (11) and the two branch flow channels (12), and the shunting structure (14) and the first wavy structure (23) of the branch flow channel (12) are in an arc-plane transition structure.

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