An electric hair dryer

Abstract

The utility model relates to the technical field of household appliances, and particularly relates to an electric hair dryer, which comprises a shell and an air outlet cover, the shell is provided with an air inlet and an air outlet, the shell is internally provided with an internal air duct, the air outlet is communicated with the air inlet through the internal air duct, the air outlet cover is arranged on the air outlet, a plurality of air outlet holes are arranged around the air outlet cover, the air outlet hole is provided with a wind guide inclined surface, and the wind guide inclined surface gradually approaches the central axis of the air outlet hole along the airflow direction. The electric hair dryer provided by the utility model can improve the air outlet concentration and air pressure and prolong the air supply distance.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a hair dryer. Background Technology

[0002] Currently, most hair dryers on the market use a right-angle air outlet design. This design causes boundary layer separation at the outlet, resulting in disordered radial diffusion of axial airflow, leading to problems such as unconcentrated airflow, reduced air pressure, and shortened effective range. Summary of the Invention

[0003] Based on this, the purpose of this utility model is to overcome the defects or deficiencies of the prior art and provide a hair dryer whose structure can improve the concentration of airflow and wind pressure, and extend the air delivery distance.

[0004] This utility model is achieved through the following technical solution: a hair dryer, including a housing and an air outlet cover; the housing is provided with an air inlet and an air outlet, and the housing has an internal air duct, the air outlet being connected to the air inlet through the internal air duct; the air outlet cover is disposed on the air outlet, the air outlet cover is provided with a plurality of air outlet holes arranged in a circle, the air outlet holes are provided with a guide slope, the guide slope gradually approaches the central axis of the air outlet hole along the airflow direction.

[0005] Compared with existing technologies, the hair dryer provided by this utility model achieves annular airflow by opening several air outlet holes in the air outlet cover, with the air outlet holes arranged in a ring. Furthermore, a guide slope is provided at the air outlet holes, gradually approaching the central axis of the air outlet along the airflow direction. The guide slope guides the airflow to converge, thereby improving the concentration of airflow and the air pressure intensity, effectively extending the air delivery distance.

[0006] Furthermore, the distance between the intersection point of the guide slopes of any two air outlets and the surface of the air outlet cover is in the range of 50mm to 100mm. Setting the intersection point within the range of 50mm to 100mm allows the airflow to form a stable converging trajectory after leaving the air outlet, thereby effectively increasing the concentration of airflow and the air pressure intensity, and extending the air delivery distance.

[0007] Furthermore, the air outlet is an elongated hole with a width ranging from 1.5mm to 2.5mm. Designing the air outlet as an elongated hole helps guide airflow to form a more stable laminar flow, reducing turbulence and energy loss. Setting the air outlet width to 1.5mm to 2.5mm ensures sufficient ventilation while avoiding airflow blockage and wind noise caused by an excessively small hole diameter, or airflow dispersion caused by an excessively large hole diameter.

[0008] Furthermore, the ratio of the width to the length of the elongated hole is 1:8 to 12.

[0009] Furthermore, an air duct is provided on the inner side of the air outlet cover. The air duct is connected to both the air outlet and the internal air duct, and the cross-sectional area of ​​the air duct gradually increases in the direction away from the air outlet. The air duct guides airflow into the air outlet, thereby increasing the air velocity at the outlet.

[0010] Furthermore, the air intake duct and the air outlet are smoothly connected. This smooth transition reduces turbulence generation and pressure loss.

[0011] Furthermore, the exhaust duct and the internal duct are connected by a first rounded corner transition. This first rounded corner transition allows airflow at the edge to enter the exhaust duct along the first rounded corner, helping to reduce turbulence and pressure loss at the edge.

[0012] Furthermore, the radius of the first rounded corner is ≥1mm. This facilitates processing and effectively guides airflow at the edge into the air duct, reducing turbulence and pressure loss at the edge.

[0013] Furthermore, the air outlet has a second rounded corner at its edge, with a radius ≥ 0.2 mm. This second rounded corner design smooths the airflow direction and reduces flow resistance at the outlet.

[0014] Furthermore, the cross-sectional shape of the air outlet cover is circular; a plurality of the air outlet holes are arranged sequentially around the central axis of the air outlet cover. This helps the hair dryer to output air evenly.

[0015] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the hair dryer described in this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the air outlet cover described in this utility model;

[0018] Figure 3 for Figure 2 Cross-sectional view of AA in the middle;

[0019] Figure 4 This is a schematic diagram of the extended guide slope of the air outlet cover described in this utility model;

[0020] Figure 5 This is a schematic diagram of the airflow inside the hair dryer described in this utility model;

[0021] Figure 6 This is an explosion diagram of the hair dryer described in this utility model.

[0022] Reference numerals: 10, housing; 11, main housing; 111, air outlet; 12, handle; 121, air inlet; 122, air inlet duct; 20, air outlet cover; 21, cover body; 211, air duct; 22, annular connection; 221, air outlet duct; 222, connecting port; 23, air outlet hole; 231, air guide slope; 30, heater; 40, heater bracket; 50, main control board. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Example 1

[0025] like Figures 1 to 6 As shown, this embodiment provides a hair dryer, including a housing 10 and an air outlet cover 20. The housing 10 has an air inlet 121 and an air outlet 111, and an internal air duct inside the housing. The air outlet 111 is connected to the air inlet 121 through the internal air duct. The air outlet cover 20 covers the air outlet 111, and the air outlet cover 20 has a plurality of air outlet holes 23 arranged in a ring. Each air outlet hole 23 has a guide slope 231, which gradually approaches the central axis of the air outlet hole 23 along the airflow direction. By opening a plurality of air outlet holes 23 on the air outlet cover 20 covering the air outlet 111, and arranging the plurality of air outlet holes 23 in a ring, annular airflow is achieved. Based on this, a guide slope 231 is then provided at the air outlet 23. The guide slope 231 gradually approaches the central axis of the air outlet 23 along the airflow direction, guiding the airflow to converge, thereby improving the concentration of the airflow and the wind pressure intensity, and effectively extending the air delivery distance. Preferably, the guide slope 231 is provided on the inner wall of the air outlet near the side edge of the air outlet cover 20. Of course, in other alternative embodiments, the guide slope 231 is provided on the inner wall of other sides of the air outlet, and the specific design can be based on the actual situation, which is not limited here.

[0026] The housing 10 includes a main housing 11 and a handle portion 12 disposed on one side of the main housing 11. In this embodiment, the handle portion 12 is provided with an air inlet duct 122, and an air inlet 121 communicating with the air inlet duct 122 is opened at the bottom of the handle portion 12. The main housing 11 is provided with an air outlet duct 221 communicating with the air inlet duct 122. The air inlet duct 122 and the air outlet duct 221 define the internal air duct, and an air outlet 111 communicating with the air outlet duct 221 is provided at one end of the main housing 11. Through the connection design between the air inlet duct 122 of the handle portion 12 and the air outlet duct 221 in the main housing 11, a directional airflow channel is formed, which can introduce external air from the bottom of the handle portion 12 into the hair dryer, thereby effectively removing heat from the heating elements (such as motors, circuit boards, etc.) in the main housing 11 and the handle portion 12. Of course, in other alternative embodiments, the air inlet duct 122 and the air inlet 121 can both be provided on the main housing 11. For example, the main housing 11 has an air inlet 121 and an air outlet 111 at both ends, and the main housing 11 is provided with an air inlet duct 122 and an air outlet duct 221 that are respectively connected to the air inlet 121 and the air outlet 111. The air inlet duct 122 and the air outlet duct 221 are connected to each other to form the internal air duct.

[0027] In this embodiment, the air outlet cover 20 includes a cover body 21 and an annular connecting portion 22 disposed at one end of the cover body 21. The main housing 11 is a hollow housing with an air outlet 111. The cover body 21 covers the air outlet 111, and the cover body 21 is provided with the air outlet hole 23. The annular connecting portion 22 extends through the air outlet 111 into the main housing 11 and is connected to the inner wall of the main housing 11. The annular connecting portion 22 defines the air outlet duct 221. The annular connecting portion 22 is provided with a connecting port 222 at a position corresponding to the air inlet duct 122. The air outlet duct 221 is connected to the air inlet duct 122 through the connecting port 222. The airflow in the air inlet duct 122 can enter the annular connecting portion 22 through the connecting port 222 and then be blown out through the air outlet hole 23. The design of the annular connecting part 22 can improve the stability of the connection between the air outlet cover 20 and the main housing 11. Of course, in other alternative embodiments, the air outlet cover 20 can be just a cover body 21, the inner wall of the main housing 11 defines the air outlet duct 221, the cover body 21 covers the air outlet 111, and the cover body 21 is provided with the air outlet hole 23 communicating with the air outlet duct 221.

[0028] In this embodiment, an air-guiding duct 211 is provided on the inner side of the cover 21. The air-guiding duct 211 is located between the air outlet 23 and the air outlet duct 221, and is connected to both the air outlet 23 and the air outlet duct 211. The cross-sectional area of ​​the air-guiding duct 211 gradually increases in the direction away from the air outlet 23. That is, the air-guiding duct 211 is a tapered duct with a larger inlet end and a smaller outlet end. Through the design of the air-guiding duct 211, the airflow is guided into the air outlet 23 while increasing the outlet air velocity. Preferably, the air-guiding duct 211 and the air outlet 23 are smoothly connected. A smooth transition can reduce turbulence generation and reduce pressure loss. Of course, in other alternative embodiments, the cross-sectional area of ​​the outlet end of the air-guiding duct 211 can also be larger or smaller than the cross-sectional area of ​​the inlet end of the air outlet.

[0029] In this embodiment, the air intake duct 211 and the air outlet duct 221 are transitioned by a first rounded corner. This first rounded corner allows airflow at the edge to enter the air intake duct 211 along the rounded corner, helping to reduce turbulence and pressure loss. In this embodiment, the radius of the first rounded corner is ≥1mm. A first rounded corner that is too small is inconvenient to manufacture and cannot effectively guide airflow; therefore, the radius of the first rounded corner needs to be set at 1mm or more (including 1mm) to facilitate manufacturing and effectively guide airflow at the edge into the air intake duct 211, reducing turbulence and pressure loss at the edge.

[0030] In this embodiment, the air outlet cover 20 has a circular cross-sectional shape, and the air outlet 23 is an arc-shaped elongated hole, with several of these arc-shaped elongated holes arranged sequentially around the central axis of the air outlet cover 20. Designing the air outlet 23 as an elongated hole helps guide airflow to form a more stable laminar flow, reducing turbulence and energy loss. Arranging them sequentially around the central axis of the air outlet cover 20 also helps to ensure uniform airflow. Preferably, the width of the air outlet 23 is in the range of 1.5mm to 2.5mm. If the width of the air outlet 23 is less than 1.5mm, it is too small and easily leads to airflow blockage, and can easily generate wind noise when the blowing speed is too high; if the width of the air outlet 23 is greater than 2.5mm, the airflow is too large and easily dispersed, which is not conducive to concentrated airflow and prolongs the air delivery distance. Therefore, the width range of the air outlet 23 is controlled within 1.5mm to 2.5mm. The width of the air outlet can be 2mm; a 2mm width design can ensure sufficient ventilation while avoiding problems such as airflow blockage, wind noise, or airflow dispersion. In this embodiment, the ratio of the width to the length (in this embodiment, the elongated hole is an arc-shaped elongated hole; therefore, in this embodiment, the length refers to the arc length of the arc-shaped elongated hole) of the elongated hole is 1:8 to 12. If the width-to-length ratio of the elongated hole is less than 1:8, the elongated hole is too short, resulting in a weakened adhesion effect of the airflow along its length, an increased vertical diffusion angle, and causing the airflow to spread out in a "fan shape," which is not conducive to concentrated airflow. If the width-to-length ratio of the elongated hole is greater than 1:12, the elongated hole is too long, which can easily lead to airflow blockage and wind noise. Therefore, the width-to-length ratio of the elongated hole is controlled within 1:8 to 12. The width-to-length ratio of the elongated hole can be selected as 1:10, which can ensure sufficient ventilation volume while avoiding problems such as airflow blockage, wind noise, or airflow dispersion. It should be noted that the elongated hole is not limited to an arc-shaped elongated hole; it can also be a straight elongated hole.

[0031] In this embodiment, the distance b between the intersection point of the extended guide slopes 231 of any two air outlets 23 and the surface of the air outlet cover 20 is in the range of 50mm to 100mm. Setting the distance b within the range of 50mm to 100mm allows the airflow to form a stable converging trajectory after leaving the air outlet, thereby effectively concentrating the airflow and increasing the air pressure, and extending the air delivery distance. If the distance b between the intersection point and the surface of the air outlet cover 20 is less than 50mm, the tilt angle of the guide slope 231 relative to the central axis of the air outlet 23 will be too large, which will greatly reduce the guiding effect of the guide slope 231 and may even block the airflow. If the distance b between the intersection point and the surface of the air outlet cover 20 is less than 50mm, the tilt angle of the guide slope 231 relative to the central axis of the air outlet 23 will be too small, which will also reduce the guiding effect of the guide slope 231 and easily cause the airflow to disperse. The distance b between the intersection point of the extended guide slopes 231 of any two air outlets 23 and the surface of the air outlet cover 20 can be 75mm, which can play a good guiding role while avoiding blocking or dispersing the airflow.

[0032] In this embodiment, the hair dryer further includes a heater 30 and a heater bracket 40, with the heater 30 disposed within the annular connecting portion 22 via the heater bracket 40. The heater 30 enables the hair dryer to blow out hot air.

[0033] In this embodiment, the hair dryer further includes an ionizer and an ion support, with the ionizer disposed within the annular connecting portion 22 via the ion support. The ionizer allows the airflow from the hair dryer to carry water ions and / or negative ions, which helps reduce static electricity and frizz in the hair.

[0034] In this embodiment, the hair dryer also includes a drive motor disposed within the handle portion 12. The drive motor drives the fan blades to rotate at high speed, drawing in air through the air inlet and accelerating its expulsion to form a high-speed airflow.

[0035] In this embodiment, the hair dryer also includes a main control board 50 disposed at the end of the main housing 11 away from the air outlet, and the main control board 50 is electrically connected to the drive motor, the heater 30 and the water ionizer respectively.

[0036] In this embodiment, the air outlet 23 has a second rounded corner at its edge, and the radius of the second rounded corner is ≥0.2mm. The design of the second rounded corner can smooth the airflow direction and reduce the flow resistance at the outlet.

[0037] Compared with existing technologies, the hair dryer provided by this utility model achieves airflow by opening several air outlet holes in the air outlet cover, with the air outlet holes arranged in a circular pattern. Furthermore, a guide slope is provided on the inner wall of the air outlet hole near the side edge of the air outlet cover. The guide slope gradually approaches the central axis of the air outlet hole along the airflow direction, guiding the airflow to converge, thereby improving the concentration of airflow and the wind pressure intensity, and effectively extending the air delivery distance.

[0038] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments and claims of this application are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that, unless otherwise stated, “a plurality” refers to two or more; the terms “first,” “second,” “third,” etc., are used only to distinguish and not to describe a particular order or sequence, nor should they be construed as indicating or implying relative importance. The term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items. When the above description relates to drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A hair dryer, characterized in that, It includes a housing and an air outlet cover; the housing is provided with an air inlet and an air outlet, and the housing has an internal air duct, the air outlet being connected to the air inlet through the internal air duct; the air outlet cover is placed over the air outlet, and the air outlet cover is provided with a plurality of air outlet holes arranged in a circle, the air outlet holes being provided with a guide slope, the guide slope gradually approaching the central axis of the air outlet hole along the airflow direction.

2. The hair dryer according to claim 1, characterized in that, The distance between the intersection point of the guide slopes of any two of the air outlets and the surface of the air outlet cover is in the range of 50mm to 100mm.

3. The hair dryer according to claim 1, characterized in that, The air outlet is an elongated hole, and the width of the air outlet ranges from 1.5mm to 2.5mm.

4. The hair dryer according to claim 3, characterized in that, The ratio of the width to the length of the elongated hole is 1:8 to 12.

5. The hair dryer according to claim 1, characterized in that, An air duct is also provided on the inner side of the air outlet cover. The air duct is connected to the air outlet and the internal air duct, and the cross-sectional area of ​​the air duct gradually increases in the direction away from the air outlet.

6. The hair dryer according to claim 5, characterized in that, The air intake duct and the air outlet are smoothly connected.

7. The hair dryer according to claim 5, characterized in that, The exhaust duct and the internal duct are connected by a first rounded corner transition.

8. The hair dryer according to claim 7, characterized in that, The radius of the first fillet is ≥1mm.

9. The hair dryer according to claim 7, characterized in that, The air outlet has a second rounded corner at its edge, and the radius of the second rounded corner is ≥0.2mm.

10. The hair dryer according to claim 1, characterized in that, The cross-sectional shape of the air outlet cover is circular; a plurality of air outlet holes are arranged sequentially around the central axis of the air outlet cover.

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