Duct system applied to hair straightener

Abstract

To provide a duct system applied to a hair straightener, which allows hot air to act more uniformly and efficiently on hair, and prevents the hair from being damaged. [Solution] The duct system includes a main body 10, which has a main flow path 11 inside and two branch flow paths 12 connected to the main flow path, and two sandwiching walls 20 spaced apart from each other, which form a sandwiching space between the two sandwiching walls for sandwiching hair, and which are provided with two branch flow paths along the length of the two sandwiching walls. The sandwiching walls are formed with a plurality of oblique outlet holes 22 along their length, and the sandwiching space and the branch flow paths communicate with each other via the oblique outlet holes.

Description

[Technical Field]

[0001] The present invention relates to the technical field of hair straighteners, and more particularly to a duct system applied to a hair straightener. [Background technology]

[0002] In the field of hairdressing and beauty, flat irons are a common hair styling tool that uses high-temperature heating to straighten hair. However, the high-temperature heating process can easily cause irreparable damage to hair, such as denaturing hair proteins and causing moisture loss, leading to dryness and splitting of hair, which has serious impacts on hair health.

[0003] To solve the above problems, the prior art proposes a hair straightener with utility model registration number CN222787217U, in which a guide slope is provided in the working passage, and when the airflow in the working cavity flows out through the oblique outlet holes, the airflow is guided by the guide slope and flows through the working passage, and the speed and heat of the airflow are utilized intensively, thereby achieving highly efficient drying and straightening of hair and reducing direct damage to hair caused by high temperatures to a certain extent.

[0004] However, when a hair straightener similar to this structure is actually used, it has been found that the structural design of the hair straightener, which forms multiple oblique outlet holes by providing multiple deflectors, has significant defects. Specifically, the hot air cannot act uniformly on each oblique outlet hole inside the working cavity, so more hot air is blown intensively to the oblique outlet holes closest to the end of the working cavity, preventing the hot air from acting uniformly on the working passage. This significantly reduces the dry straightening effect on the hair, making it difficult to meet the user's dual needs for ideal straightening effect and hair care. Therefore, it is necessary to provide an improved technical means to solve the above problems. Summary of the Invention

[0005] In order to overcome the above drawbacks, the present invention provides technical means that can solve the above problems.

[0006] A duct system applicable to a hair straightener includes a main body, the main body having therein a main flow path and two branch flow paths connected to the main flow path, the main body having two clamping walls spaced apart from each other, a clamping space for clamping hair between the two clamping walls, the main flow path and the two branch flow paths connected to the main flow path are provided inside the main body, and the two branch flow paths are provided along the length direction of the two clamping walls, a plurality of oblique outlet holes are formed in the clamping walls along the length direction, the clamping space and the branch flow paths are connected to each other via the oblique outlet holes, The main body is formed with an intake port connected to the main flow path, thereby enabling the formation of a directional fluid that enters through the intake port, passes through the main flow path and the branch flow path, and is then sprayed into the clamping space from the oblique blowing holes. A plurality of arc-surfaced protrusion structures corresponding to each of the oblique blowing holes are formed on the wall surface of the clamping wall on the side corresponding to the branch flow path, and the arc-surfaced protrusion structures and the corresponding oblique blowing holes present an arc-surface transition structure. The branch flow path has a cross-sectional area that gradually decreases from one end connected to the main flow path to its end, and the dimensions of the plurality of arc-surfaced protrusion structures gradually decrease in accordance with the gradual decrease in the cross-sectional area of the branch flow path.

[0007] Preferably, the branch flow path has a main surface which is the wall surface of the clamping wall, side surfaces abutting against both sides of the main surface, a back surface opposite the main surface, and an end surface at the end of the branch flow path, and the arc-surface protrusion structure is an elongated structure, with both ends abutting against both side surfaces of the branch flow path.

[0008] Preferably, the branch flow path is configured such that the two side surfaces gradually approach the center from one end connected to the main flow path to the end of the branch flow path, so that the length of the multiple arc-surface protrusion structures gradually decreases as the cross-sectional area of the branch flow path gradually decreases.

[0009] Preferably, an arc-surface transition structure is formed between two adjacent arc-surface protrusion structures, the arc-surface transition structure at the end position of the branch flow path and the end face and back face of the branch flow path form arc-surface transition structures, and the oblique blowing holes are provided in the arc-surface transition structure.

[0010] Preferably, the oblique blowing hole is arranged on the center line of the clamping wall, and the arc-surface protrusion structure has two protrusions that are symmetrical to each other, and an included angle is formed between the two protrusions, so that the arc-surface protrusion structure can guide the directional fluid to merge toward the center.

[0011] Preferably, the angle between the two protrusions is between 150° and 180°.

[0012] Preferably, a flow dividing structure is provided between the main flow path and the two branch flow paths, and the flow dividing structure and the first arc-surface protrusion structure of the branch flow path form an arc-surface transition structure.

[0013] Preferably, the oblique blowing hole has a transition portion that is abutted against the branch flow path in a normal direction, and an inclined portion that abuts against the sandwiching space at an angle.

[0014] Preferably, the angle between the inclined portion and the wall surface of the sandwiching wall is 20° to 60°.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The cross-sectional area of the branch flow passages is gradually reduced, and the dimensions of the arc-surface protrusion structure are correspondingly gradually reduced. This design allows the fluid closer to the main flow passage to be guided to a greater extent through the Coanda effect and flow to the oblique outlet holes, effectively overcoming the problem of uneven hot air distribution in traditional ducts and ensuring that the hot air is blown out evenly from each oblique outlet hole. The arc-surface protrusion structure increases the contact area of the clamping walls, allowing more hot air to act on the clamping walls and achieving a heat-collecting function to a certain extent. This allows the hot air to act on the hair more evenly and efficiently, preventing localized overheating and damage to the hair, better protecting the quality of the hair, achieving both beauty and hair health, and bringing users a better hair straightening and shaping experience.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. [Brief explanation of the drawings]

[0018] In order to more clearly explain the embodiments of the present invention or the technical means of the prior art, the drawings necessary for explaining the embodiments or the prior art will be briefly described below. Obviously, the drawings described are only a part of the embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without any creative work.

[0019] [Figure 1] 1 is a schematic diagram of the present invention. [Figure 2] 1 is a schematic plan view of the vertical cross section of the present invention; [Figure 3] FIG. 3 is a schematic diagram of the configuration of part A in FIG. 2 of the present invention. [Figure 4] 1 is a schematic perspective view of the vertical cross section of the present invention; [Figure 5] FIG. 5 is a schematic diagram of the configuration of part B in FIG. 4 of the present invention. [Figure 6] 1 is a schematic structural plan view of the present invention in transverse cross section; [Figure 7]1 is a perspective view of a schematic cross section of the present invention; [Figure 8] 4 is a diagram illustrating the effect of the present invention when a fluid flows. [Figure 9] 4 is a diagram illustrating the effect of the arcuate protrusion structure of the present invention in guiding the flow of fluid. [Figure 10] FIG. 10 is another diagram illustrating the effect of the present invention when a fluid flows. DETAILED DESCRIPTION OF THE INVENTION

[0020] The technical means in the embodiments of the present invention will be described below clearly and completely, and it is obvious that the described embodiments are only some of the embodiments of the present invention, not all of the embodiments, and all other embodiments that can be obtained by those skilled in the art based on the embodiments of the present invention without any creative work are all within the scope of protection of the present invention.

[0021] As shown in Figures 1 to 10, in an embodiment of the present invention, a duct system applied to a hair straightener includes a main body 10, the main body 10 has therein a main flow path 11 and two branch flow paths 12 connected to the main flow path 11, the main body 10 has two clamping walls 20 spaced apart from each other, and a clamping space 21 for clamping hair is formed between the two clamping walls 20, the main flow path 11 and two branch flow paths 12 connected to the main flow path 11 are provided inside the main body 10, and the two branch flow paths 12 are provided along the length direction of the two clamping walls 20, and a plurality of oblique outlet holes 22 are formed in the clamping wall 20 along its length direction, and the clamping space 21 and the branch flow paths 12 are obliquely arranged. The main body 10 is formed with an intake port 13 that is connected to the main flow path 11 and is connected via the blowing holes 22, thereby making it possible to form a directional fluid that enters through the intake port 13, passes through the main flow path 11 and the branch flow paths 12, and is then sprayed into the clamping space 21 from the oblique blowing holes 22.The wall surface of the clamping wall 20 on the side corresponding to the branch flow paths 12 is formed with a plurality of arc-surface protrusion structures 23 corresponding to each oblique blowing hole 22, and the arc-surface protrusion structures 23 and the corresponding oblique blowing holes 22 present an arc-surface transition structure, and the cross-sectional area of the branch flow path 12 gradually decreases from one end connected to the main flow path 11 to its end, and the dimensions of the plurality of arc-surface protrusion structures 23 gradually decrease as the cross-sectional area of the branch flow path 12 gradually decreases.

[0022] In the duct system of the hair straightener, the inlet 13 of the main body 10 is connected to an air supply device to take in hot air, which then flows through the main channel 11 and branches into two branch channels 12 extending along the length of the clamping wall 20. The branch channels 12 are designed so that the cross-sectional area gradually decreases from the connection point with the main channel 11 to the end, which encourages the speed of the hot air to continuously increase during the flow process and makes the pressure distribution more uniform. After the hot air enters the branch channels 12, it is blown into the clamping space 21 at an oblique angle through a plurality of oblique outlet holes 22 arranged along the length of the clamping wall 20, so that the hair placed in the clamping space 21 can be blown out to one side. The arc-shaped protrusion structures 23 corresponding to one side of the wall surface of the branch channels 12 on the clamping wall 20 are in contact with the oblique outlet holes 22. An arc-shaped transition is formed, and branch channel 12 has a main surface which is the wall surface of sandwiching wall 20, side surfaces abutting both sides of the main surface, a back surface opposite the main surface, and an end surface at the end of branch channel 12. Arc-shaped protrusion structure 23 is an elongated structure with both ends abutting both sides of branch channel 12. The arc-shaped transition between arc-shaped protrusion structure 23 and oblique outlet holes 22 effectively guides the fluid flowing along its length within branch channel 12, smoothly changing the fluid flow direction and accurately directing it toward oblique outlet holes 22. This design makes full use of the Coanda effect, allowing the fluid to flow closely to the wall surface under the action of the arc, avoiding turbulence or wind resistance caused by a sudden change in flow direction and ensuring that the hot air blows out stably and uniformly from oblique outlet holes 22. This arc-shaped protrusion structure 23 cleverly utilizes the Coanda effect to guide the airflow direction, and its dimensions are in line with the gradual decrease in the cross-sectional area of branch channel 12. Specifically, the branch flow channel 12 is configured such that its two sides gradually approach the center from one end connected to the main flow channel 11 to the end of the branch flow channel 12, so that the length of the multiple arcuate protrusion structures 23 gradually decreases as the cross-sectional area of the branch flow channel 12 gradually decreases. This design enhances the guiding effect of the arcuate protrusion structures 23 in the area close to the main flow channel 11, effectively preventing a lack of air volume from the oblique outlet holes 22 in this area, allowing the hot air to flow smoothly and evenly through the oblique outlet holes 22 into the clamping space 21, thereby achieving a dry straightening treatment for the hair.

[0023] The cross-sectional area of the branch flow passages 12 is gradually reduced, and the dimensions of the arc-surface protrusion structures 23 are correspondingly gradually reduced. This design allows the fluid closer to the main flow passage 11 to be guided to a greater extent to flow into the oblique outlet holes 22 by utilizing the Coanda effect, effectively overcoming the problem of uneven hot air distribution in conventional ducts and ensuring that the hot air is blown out evenly from each oblique outlet hole 22. The provision of the arc-surface protrusion structures 23 increases the contact area of the wall surfaces of the clamping walls 20, allowing more of the hot air to act on the wall surfaces of the clamping walls 20 and achieving a heat-collecting function to a certain extent. This allows the hot air to act on the hair more evenly and efficiently, preventing localized overheating and damage to the hair, better protecting the quality of the hair, achieving both beauty and hair health, and bringing users a better hair straightening and shaping experience.

[0024] 2 to 4, based on the above technical means, the following technical means is further proposed. An arcuate transition structure is formed between two adjacent arcuate protrusion structures 23, and the arcuate transition structure at the end of the branch flow path 12 and the end face and back face of the branch flow path 12 also form arcuate transition structures, and oblique outlet holes 22 are provided in the arcuate transition structure. Designing such an arcuate transition structure optimizes the performance of the duct system in multiple dimensions, making the fluid flow path within the branch flow path 12 smoother and effectively reducing wind resistance.

[0025] As shown in Fig. 1, based on the above technical means, the following technical means is further proposed: the oblique blowing hole 22 is provided on the center line of the sandwiching wall 20, the arc-surface protrusion structure 23 has two protrusions 231 that are symmetrical to each other, and an included angle is formed between the two protrusions 231, so that the arc-surface protrusion structure 23 can guide the directional fluid to join together in the center, and the included angle between the two protrusions 231 is 150° to 180°. The oblique outlet holes 22 are located in the center, and in accordance with the symmetrical guiding characteristics of the arc-surface protrusion structure 23, during the flow of directional fluid in the branch flow path 12, the fluid is guided by the included angle of the two protrusions 231 and steadily gathers toward the central area where the oblique outlet holes 22 are located, preventing the hot air from dispersing or deviating in its flow direction and ensuring that the hot air is blown out from the oblique outlet holes 22 in a concentrated and strong state. This design effectively improves the utilization rate of the hot air, further improves the smoothness of the fluid flow path in the branch flow path 12, and further reduces wind resistance.

[0026] 6-7, based on the above technical means, the following technical means is further proposed: A flow dividing structure 14 is provided between the main flow path 11 and the two branch flow paths 12, and the flow dividing structure 14 and the first arc-surface protrusion structure 23 of the branch flow path 12 form an arc-surface transition structure. The addition of a diversion structure 14 between the main channel 11 and the branch channels 12 and the design of an arc-shaped transition between the diversion structure 14 and the first arc-shaped protrusion structure 23 optimizes the continuity of airflow distribution and transmission. Specifically, the diversion structure 14 can evenly guide the hot air in the main channel 11 to the two branch channels 12, preventing the air volume in one branch channel 12 from being too large or too small due to uneven distribution. This ensures balanced hot air distribution from the beginning. The arc-shaped transition between the diversion structure 14 and the first arc-shaped protrusion structure 23 eliminates the sudden change in airflow and vortex phenomenon that occurs at the bending point of the conventional structure. This maintains a smooth and stable flow as the hot air flows from the main channel 11 into the branch channel 12 and then through the arc-shaped protrusion structure 23 to the oblique outlet 22, significantly reducing wind resistance and energy loss. Such a continuous and smooth structural connection not only improves the transmission efficiency of hot air, but also further strengthens the uniformity of hot air distribution, allowing the hair straightener to perform dry straightening treatment on hair more efficiently and stably.

[0027] 6 and 7, based on the above technical means, the following technical means are further provided: The oblique blowing hole 22 has a transition portion 221 that is abutted against the branch flow path 12 in the normal direction, and an inclined portion 222 that is abutted against the sandwiching space 21 at an angle, and the included angle between the inclined portion 222 and the wall surface of the sandwiching wall 20 is 20° to 60°. The transition portion 221 is abutted against the branch flow path 12 in the normal direction, so that the hot air can flow stably and efficiently from the branch flow path 12 to the oblique outlet holes 22, reducing wind resistance and energy loss caused by sudden changes in direction. The inclined portion 222 is abutted against the clamping space 21 at a specific angle, so that the hot air can be accurately guided to blow onto the hair at an ideal angle. When the included angle is in the range of 20° to 60°, it ensures that the hot air generates sufficient force on the hair, allowing the hair to move smoothly to one side and assisting the straightening process. It also avoids excessive dispersion of the hot air due to an angle that is too large, or concentrated collision of the hot air on specific parts of the hair due to an angle that is too small, so that the hot air can act evenly and efficiently on the hair.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the illustrative embodiments set forth above, and that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Accordingly, the embodiments should be considered in all respects as illustrative and not limiting. The scope of the present invention is not limited to the above description, but is defined by the appended claims, and it is therefore intended to cover all changes that come within the meaning and range of equivalents of the claims. [Explanation of symbols]

[0029] 10 Main Unit 11 Main channel 12 Branch flow path 13 Intake port 14 Diversion structure 20 Clamping wall 21 Clamping space 22 Oblique air outlet 221 Transition section 222 inclined portion 23 Arc surface protrusion structure 231 protrusion

Claims

1. A duct system to be applied to a hair straightener, comprising a main body (10), the main body (10) having therein a main flow path (11) and two branch flow paths (12) connected to the main flow path (11), the main body (10) having two clamping walls (20) spaced apart from each other, and a clamping space (21) for clamping hair is formed between the two clamping walls (20), the main flow path (11) and the two branch flow paths (12) connected to the main flow path (11) are provided inside the main body (10), and the two branch flow paths (12) are provided along the length direction of the two clamping walls (20), the clamping wall (20) has a plurality of oblique outlet holes (22) formed along the length direction thereof, and the clamping space (21) and the branch flow paths (12) are connected to each other via the oblique outlet holes (22). The main body (10) is formed with an intake port (13) communicating with the main flow path (11), so that a directional fluid can be formed that enters through the intake port (13), passes through the main flow path (11) and the branch flow paths (12), and is then sprayed into the sandwiching space (21) from the oblique blowing holes (22). A wall surface of the sandwiching wall (20) on the side corresponding to the branch flow paths (12) is formed with a plurality of arc-surface protrusion structures (23) corresponding to each of the oblique blowing holes (22), and the arc-surface protrusion structures (23) and the corresponding oblique blowing holes (22) have an arc-surface transition structure. The branch flow paths (12) have a cross-sectional area that gradually decreases from one end connected to the main flow path (11) to its end, and the dimensions of the plurality of arc-surface protrusion structures (23) gradually decrease in accordance with the gradual decrease in the cross-sectional area of the branch flow paths (12). A duct system applicable to a hair straightener.

2. The branch flow path (12) has a main surface which is a wall surface of the sandwiching wall (20), side surfaces abutting on both sides of the main surface, a back surface opposite to the main surface, and an end surface at the end of the branch flow path (12), and the arc-surface protrusion structure (23) is an elongated structure, and both ends abut on both side surfaces of the branch flow path (12). A duct system applied to the hair straightener according to claim 1.

3. The branch flow path (12) is provided in a structure in which the two side surfaces gradually approach the center from one end connected to the main flow path (11) to the end of the branch flow path (12), so that the length of the multiple arc-surface protrusion structures (23) gradually decreases as the cross-sectional area of the branch flow path (12) gradually decreases. A duct system applied to the hair straightener according to claim 2.

4. An arc-surface transition structure is formed between two adjacent arc-surface protrusion structures (23), and the arc-surface transition structure at the end position of the branch flow path (12) and the end face and back face of the branch flow path (12) form arc-surface transition structures, and the oblique blowing holes (22) are provided in the arc-surface transition structure. A duct system applied to the hair straightener according to claim 2.

5. The oblique blowing hole (22) is provided on the center line of the sandwiching wall (20), and the arc-shaped protrusion structure (23) has two protrusions (231) symmetrical to each other, and an included angle is formed between the two protrusions (231), so that the arc-shaped protrusion structure (23) can guide the directional fluid to join together in the center. A duct system applied to the hair straightener according to claim 2.

6. The angle between the two protrusions (231) is between 150° and 180°. A duct system applied to the hair straightener according to claim 5.

7. a flow dividing structure (14) is provided between the main flow path (11) and the two branch flow paths (12), and the flow dividing structure (14) and the first arc-surface protrusion structure (23) of the branch flow path (12) form an arc-surface transition structure; A duct system applied to the hair straightener according to claim 1.

8. The oblique blowing hole (22) has a transition portion (221) that is abutted against the branch flow path (12) in a normal direction, and an inclined portion (222) that is abutted against the clamping space (21) at an angle. A duct system applied to the hair straightener according to claim 1.

9. The duct system applied to the hair straightener according to claim 8, characterized in that the included angle between the inclined portion (222) and the wall surface of the clamping wall (20) is 20° to 60°.

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