Dead-angle-free flow guide structure and electric hair drier

Abstract

The flow guide structure comprises a shell, an air outlet area is arranged on the surface of the shell, an air guide piece is arranged in the shell, the face, facing the air outlet area, of the air guide piece and the shell are enclosed to form an air cavity, and at least one arc-shaped flow guide part is arranged on the face, facing the air outlet area, of the air guide piece. When air flow enters the air cavity 13 from the air inlet end and encounters the first wave crest, the air flow is divided into two strands, one strand inclines towards the air outlet area, the other strand continues to advance along the wave trough surface of the air guide piece to reach the second wave crest to be shunted again, the shunting and guiding technical characteristic does not occupy the space of the air cavity, the air flow is smooth, noise is low, and the service life is long. In addition, in the process, high-speed airflow is not hindered, the airflow can fully fill the air cavity, the dead-angle-free effect is achieved, meanwhile, the kinetic energy of the airflow is reduced, air outlet can be achieved at all positions of the air outlet area, and the air outlet effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hair care tool accessories, in particular to a hair dryer with a flow guide structure without dead angles. Background Art

[0002] In order to meet different hairdressing needs, there are many hair styling accessories, such as wind hoods, flat mouths and hair combs. In a hair dryer comb, many comb teeth are connected to the outer surface of the base, a channel is provided inside the base, and air outlets are provided on its outer surface staggered with the comb teeth. The base is connected to the hair dryer so that the hot air output by the hair dryer can be blown out from the air outlet through the channel to achieve functions such as combing, drying and styling. For products with air outlet functions, the smoothness of air flow is very important. For example, in the public technical document "CN216019619U, accessories for hair care appliances", the diverter part 32 is vertically connected to the buffer part 31, and extends into the ventilation cavity 14 through the through hole 121, blocking and diverting the airflow, and adjusting the air outlet area and flow direction;

[0003] With the in-depth research on the product, it was found that there were some problems with the existing products, and at the same time, a new understanding of product design was obtained. After the airflow enters the air cavity, the diversion part will block the airflow. Although the expected effect is to "block and divert the airflow to adjust the air outlet area and flow direction", in actual application, a dead angle will be formed on one side of the diversion part, such as Figure 9 As shown, no airflow is blown out from this position, and since a heating element is arranged in the wind cavity, it is impossible to set interval guide plates in the wind cavity to guide the airflow to be ejected more evenly from the air outlet area. Most of the airflow enters the wind cavity from the air inlet end and is ejected from some air outlets in the air outlet area away from the air inlet end, resulting in less air output from some air outlets in the air outlet area close to the air inlet end. Utility Model Content

[0004] The utility model aims to provide a hair dryer with a flow-guiding structure without dead angles, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A guide structure with no dead angles includes a shell, a wind outlet area is provided on the shell surface, a wind guide is provided inside the shell, a side of the wind guide facing the wind outlet area is combined with the shell to form a wind cavity, and at least one arc-shaped guide portion is provided on a side of the wind guide facing the wind outlet area.

[0007] According to a further technical solution, the air guide is in the shape of a plate and is arranged obliquely in the shell so that the space of the air cavity gradually decreases from the air inlet end to the other end.

[0008] Further technical solution: On both sides of the arc-shaped air guiding part near the air inlet end, it inclines and contracts inwards.

[0009] Further technical solution: The housing is cylindrical, and several air outlet areas are provided around the outer circumference of the housing. The air guiding member is columnar and installed in the middle of the housing, and the arc-shaped air guiding part corresponds to all the air outlet areas.

[0010] Further technical solution: An opening is provided at the end of the housing, and an end cover is detachably provided at the opening. A fixing part is provided at the end of the air guiding member, and the fixing part abuts against the opening of the housing.

[0011] Further technical solution: There are several arc-shaped air guiding parts, and they are arranged continuously.

[0012] Further technical solution: It further includes at least one partition plate. The partition plate is arranged on the center line of the air guiding member or parallel to the center line, and extends upwards to be connected with the housing, dividing the air cavity into at least two cavities.

[0013] Further technical solution: One arc-shaped air guiding part corresponds to one wave crest and one wave trough.

[0014] A hair dryer includes the above-mentioned dead-angle-free air guiding structure.

[0015] Advantages of the present utility model:

[0016] When the air flow enters the air cavity from the air inlet end and encounters the first wave crest, the air flow is divided into two strands. One strand inclines towards the air outlet area, and the other strand continues to advance along the surface of the wave trough of the air guiding member to reach the second wave crest and is shunted again. This shunting and air guiding technical feature does not occupy the space of the air cavity, and the air flow is smooth with low noise. One or more groups of adjacent wave crests and wave troughs can be provided. In addition, during this process, the high-speed air flow is not blocked, and the air flow can fill the entire air cavity, achieving a dead-angle-free effect. At the same time, the kinetic energy of the air flow is reduced, enabling air to flow out at all positions of the air outlet area, improving the air outlet effect.

[0017] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0018] Figure 1 : Three-dimensional structure diagram of the first embodiment of the present utility model.

[0019] Figure 2 : Three-dimensional sectional view of the first embodiment of the present utility model.

[0020] Figure 3 : Internal structure diagram of the first embodiment of the present utility model.

[0021] Figure 4: Schematic diagram of air flow in Embodiment 1 of the present utility model.

[0022] Figure 5 : Three-dimensional sectional view of Embodiment 2 of the present utility model.

[0023] Figure 6 : Disassembly diagram of Embodiment 2 of the present utility model.

[0024] Figure 7 : Schematic diagram of gas flow in Embodiment 2 of the present utility model Figure 1 .

[0025] Figure 8 : Schematic diagram of gas flow in Embodiment 2 of the present utility model Figure 2 .

[0026] Figure 9 : Schematic diagram of the prior art.

[0027] Reference numerals: 11 - housing, 12 - air outlet area, 13 - air cavity, 14 - opening, 15 - end cap, 16 - air inlet end, 21 - air guiding member, 22 - arc-shaped guiding portion, 23 - fixing portion, 3 - partition plate. Detailed embodiments

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0029] Please refer to Figures 1-8 ;

[0030] The dead-angle-free guiding structure described in the present utility model is applicable to nozzles of different shapes, enabling the air flow to flow smoothly in the air cavity 13. Specifically, it includes a housing 11, and an air outlet area 12 is provided on the surface of the housing 11. An air guiding member 21 is provided inside the housing 11. In this embodiment, the specific shapes of the housing 11 and the air guiding member 21 are not limited. The ultimate effect is that the surface of the air guiding member 21 facing the air outlet area 12 and the housing 11 enclose to form an air cavity 13. At least one arc-shaped guiding portion 22 is provided on the surface of the air guiding member 21 facing the air outlet area 12, and each arc-shaped guiding portion 22 will form at least one peak and one valley;

[0031] The nozzle described in the present utility model is a fitting of a hair care appliance and needs to be used in cooperation with a tool having an air flow generating function during use. The specific shape can be customized according to the tool used and is not limited herein. One end of the nozzle should have an air inlet end 16. During use, the tool inputs high-speed air flow into the air inlet end 16 of the nozzle. When the air flow enters the air cavity 13 from the air inlet end 16 and encounters the first peak, specifically, reference can be made to Figure 4 , Figure 7 and Figure 8As shown, the air flow is divided into two streams. One stream inclines towards the air outlet area 12, and the other stream continues to advance along the trough surface of the air guide member 21 to reach the second peak and is shunted again. This shunting and guiding technical feature does not occupy the space of the air cavity 13, and the air flow is smooth with low noise. One or more groups of adjacent peaks and troughs can be provided. Additionally, during this process, the high-speed air flow is not blocked to form dead zones. Refer to Figure 9 , there are dead zones in the prior art, the air flow noise is large, and the air flow can fill the entire air cavity 13 to achieve a dead zone-free effect. At the same time, the kinetic energy of the air flow is reduced, enabling air output at all positions in the air outlet area 12 and improving the air output effect.

[0032] Based on the above embodiments, the shape of the air nozzle can be flat or cylindrical, which will be described separately below;

[0033] Embodiment 1, referring to Figures 1-4 , the shape of the housing 11 is flat, and the shape of the corresponding air guide member 21 needs to be adjusted accordingly. The air guide member 21 is plate-shaped; the air outlet area 12 is provided on one side of the housing 11, and the arc-shaped diversion portion 22 extends in the width direction of the housing 11. In this embodiment, in order to make the air flow output from each air outlet hole in the air outlet area 12 more uniform and to avoid the air flow concentrating on the air outlet holes in the air outlet area 12 far from the air inlet end 16, the air guide member 21 is inclined and arranged inside the housing 11, so that the space of the air cavity 13 gradually shrinks from the air inlet end 16 to the other end to reduce the air volume filling the remaining space, as Figure 4 shown, A is greater than B. When the air flow is blown in from the air inlet end 16 and encounters the first peak, it will be divided into two fluid streams. One fluid stream will be output from the air outlet holes in the air outlet area 12 near the peak, and the other fluid stream will cross the peak and be output from the air outlet holes in the air outlet area 12 far from the air inlet end 16 along the trough.

[0034] In addition, fixed convex columns are provided on both sides of the air cavity 13. In order to avoid obstructing the newly entered air flow, the two sides of the arc-shaped diversion portion 22 near the air inlet end 16 incline and contract inward. Such a design can make the newly entered air flow concentrate in the middle position and better adapt to the shape of the air inlet end 16.

[0035] Based on this structure, a heating element (not shown in the figure) can also be installed in the air cavity 13. By setting the arc-shaped diversion portion 22, the problem of blocked air output can be well solved, and the guiding effect on the air flow can still be achieved even if a heating element is installed in the air cavity.

[0036] Embodiment 2, referring to Figures 5-8, the housing 11 is cylindrical, and a plurality of air outlet areas 12 are provided around the outer periphery of the housing 11. The air guide member 21 is columnar and installed in the middle of the housing 11. In this embodiment, the arc-shaped diversion part 22 is arranged along the circumferential direction of the air guide member 21 to form an annular arc-shaped diversion part 22 so that it can correspond to each air outlet area 12.

[0037] When the tool inputs high-speed air flow into the air inlet end 16 of the air nozzle, the high-speed air flow will change its direction along the air guide member 21 to the peak position of the arc-shaped diversion part 22. Since both sides of the arc-shaped diversion part 22 are in arc transition with the air guide member 21, the air flow can smoothly change its direction, reducing the loss of kinetic energy. Using the special shape of the arc-shaped diversion part 22, most of the air flow is output in a "cone-shaped" trajectory towards all the air outlet areas 12. That is, when the air flow encounters the first peak, the air flow is divided into two parts, one part inclines towards the air outlet area 12, and the other part continues to advance along the trough surface of the air guide member 21 to reach the second peak and is divided again. This diversion and guiding technical feature does not occupy the space of the air cavity 13, and the air flow is smooth and the noise is low. One group or multiple groups of adjacent peaks and troughs can be set.

[0038] Based on the above two implementation manners, there are several arc-shaped diversion parts 22 and they are continuously arranged. That is to say, each arc-shaped diversion part 22 will have a peak and a trough. Each time the air flow passes through the peak, it will have a guiding effect towards the air outlet area 12, enabling the air flow to output with less loss of kinetic energy and achieving a dead-angle-free output effect.

[0039] In the first implementation manner, the entire air nozzle can be formed by integral injection molding or assembling multiple components. Therefore, the shape and number of the arc-shaped diversion parts 22 can be one or more, and can be appropriately set according to the length of the air outlet area 12. For example, the longer the length of the air outlet area 12, the more arc-shaped diversion parts 22 can be set. Based on the second implementation manner, a scheme for replacing the air guide member 21 is provided. Specifically, an opening 14 is provided at the end of the housing 11, and an end cover 15 is detachably arranged at the opening 14. A fixing part 23 is provided at the end of the air guide member 21, and the fixing part 23 abuts against the opening 14 of the housing 11. Based on the second implementation manner, accessories with different arc-shaped diversion parts 22 can be made for different user needs. When replacement is needed, only need to open the end cover 15 to draw out the air guide member 21 from the air cavity 13, then insert the new diversion part into the air cavity 13, make the fixing part 23 and the opening 14 be installed with interference fit, and then fix the end cover 15 on the housing 11 again.

[0040] Based on the further description of Embodiment 1 and Embodiment 2, through research, it is found that even if a relatively smooth air flow guiding structure is provided, vortices will be generated inside the air flow to hinder the flow. Therefore, in order to reduce the mutual influence between air flows, at least one partition plate 3 is provided on the center line or a line parallel to the center line of the air guiding member 21 and extends upward to be connected to the housing 11, dividing the air cavity 13 into at least two cavities. When the air flow enters the air cavity 13 from the air inlet end 16, the air flow is divided into two or several strands by the partition plate 3, which can reduce the mutual influence of the vortices inside the air flow. Secondly, the noise can be reduced.

[0041] The present utility model also discloses a hair dryer including the above-mentioned dead-angle-free diversion structure. The hair dryer has the same implementation manner as the dead-angle-free diversion structure and can achieve the same technical effects. Specifically, reference can be made to the embodiments of the dead-angle-free diversion structure, which will not be elaborated herein.

[0042] The present utility model also discloses a hair dryer including the above-mentioned dead-angle-free diversion structure. A brushless fan is provided in the flow channel inside the hair dryer. The brushless fan can reach more than 50,000 revolutions per minute, and the generated air flow can reach a flow rate of more than 15 meters per second.

[0043] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0044] In addition, it should be understood that although this specification is described according to the implementation manners, not every implementation manner only includes an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard 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.

Claims

1. A dead-angle-free diversion structure, characterized in that: It includes a housing (11), on the surface of the housing (11) there is an air outlet area (12), inside the housing (11) there is an air guiding member (21), one side of the air guiding member (21) facing the air outlet area (12) and the housing (11) enclose to form an air cavity (13), and on the side of the air guiding member (21) facing the air outlet area (12) there is at least one arc-shaped flow guiding portion (22).

2. The non-blind-angle diversion structure according to claim 1, wherein: The air guiding member (21) is plate-shaped and is inclined and arranged inside the housing (11) so that the space of the air cavity (13) gradually shrinks from the air inlet end (16) to the other end.

3. The non-blind-angle diversion structure according to claim 2, characterized in that: On both sides of the position of the arc-shaped flow guiding portion (22) close to the air inlet end (16), it inclines and contracts inwards.

4. A non-blind-angle diversion structure according to claim 1, characterized in that: The housing (11) is cylindrical, and several air outlet areas (12) are arranged around the outer circumference of the housing (11), and the air guiding member (21) is column-shaped and installed in the middle of the housing (11).

5. The non-blind-angle diversion structure according to claim 4, characterized in that: An opening (14) is provided at the end of the housing (11), a end cover (15) is detachably arranged at the opening (14), a fixing portion (23) is provided at the end of the air guiding member (21), and the fixing portion (23) abuts against the opening (14) of the housing (11).

6. The non-blind-angle diversion structure according to claim 1, characterized in that: There are several of the arc-shaped flow guiding portions (22) and they are arranged continuously.

7. The dead - angle - free diversion structure according to claim 1, characterized in that: It further includes at least one partition plate (3), the partition plate (3) is arranged on the center line of the air guiding member (21) or parallel to the center line and extends upwards to be connected with the housing (11) to divide the air cavity (13) into at least two cavities.

8. The non-blind-angle diversion structure according to claim 6, wherein: One arc-shaped flow guiding portion (22) corresponds to one wave crest and one wave trough.

9. A hair dryer, characterized in that: It includes the dead-angle-free flow guiding structure according to any one of claims 1-8.

10. The hair dryer according to claim 9, characterized in that: A brushless fan is arranged in the flow channel of the hair dryer, the brushless fan can reach more than 50,000 revolutions per minute, and the generated air flow can reach a flow velocity of more than 15 meters per second.

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