Hair dryer

Abstract

This utility model discloses a hair dryer, comprising: a main body with an air outlet at its front end; a handle connected to the main body, having an air inlet; and an air duct connecting the air inlet and the air outlet, including a main body air duct located inside the main body and a handle air duct connected to the main body air duct and located inside the handle. The handle air duct is configured as a flared air duct that gradually widens towards the main body without narrowing. By configuring the handle air duct as a gradually widening flared air duct, this utility model slows down the airflow velocity, allowing the fluid in the handle air duct to flow smoothly into the main body air duct, thus avoiding sudden increases in flow velocity that could cause noise. Furthermore, by combining the rounded corners of the air inlet, reducing the diameter of the air inlet, and optimizing the distance between the air inlet and the blower, along with structural and design optimizations to the air guide bracket, the noise during operation of the hair dryer can be effectively reduced, improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of hair dryers, specifically a hair dryer. Background Technology

[0002] Hair dryers, as a common household appliance, are mainly used for drying and styling hair and are widely used in daily life. With the development of related technologies and people's increasing demands for quality of life, people's expectations for the user experience of hair dryers have also risen.

[0003] Specifically, as a high-speed airflow driven device, the operating noise of a hair dryer is a significant factor affecting the user experience. During operation, the airflow driven by the internal fan undergoes multiple fluid movements, including acceleration, turning, and splitting, before being blown out. Due to certain deficiencies in the fluid dynamics design and mechanical structure layout of existing hair dryer products, noise is easily generated during operation, affecting the user experience. Utility Model Content

[0004] To address the above problems, this utility model provides a hair dryer that effectively reduces noise generated during operation by optimizing the structural design of the handle air duct and the air guide bracket between the handle air duct and the main body air duct.

[0005] This utility model discloses a hair dryer, comprising: a main body with an air outlet at the front end; a handle connected to the main body and having an air inlet; and an air duct connecting the air inlet and the air outlet, including a main body air duct located inside the main body and a handle air duct connected to the main body air duct and located inside the handle, wherein the handle air duct is configured as a flared air duct that gradually expands directly towards the main body without narrowing.

[0006] According to the above technical solution, by setting the handle air duct as a gradually expanding horn-shaped air duct, the airflow velocity can be reduced, allowing the fluid in the handle air duct to flow smoothly to the main body air duct, thereby avoiding a sudden increase in flow velocity that could cause noise.

[0007] Optionally, the handle includes a sleeve and a handle body disposed within the sleeve. The end of the sleeve away from the main body extends radially inward and is bent away from the main body to form an air inlet. The inlet edge of the air inlet is rounded.

[0008] According to the above technical solution, the rounded corners can guide the airflow to flow smoothly along the wall during air intake, eliminating abrupt changes in flow and thus reducing the corresponding noise.

[0009] Optionally, the fillet radius is R2mm or more.

[0010] Optionally, a fan is installed inside the air duct of the handle, and the distance between the air inlet end of the fan and the air inlet is 35mm-43mm.

[0011] According to the above technical solution, by increasing the distance between the fan and the air inlet and extending the airflow development section, the airflow can be fully diffused before entering the fan, so that the airflow can flow to the fan evenly and smoothly, thereby reducing the intensity of turbulence and reducing the noise generated by airflow impact; at the same time, the impact distribution of uniform airflow on the fan blades will also be symmetrical, further suppressing mechanical vibration noise.

[0012] Optionally, the diameter of the air inlet is 22mm-26mm.

[0013] According to the above technical solution, while ensuring the air intake volume, excessive air intake volume is avoided, further ensuring that the airflow can be fully diffused and flow evenly and smoothly to the fan.

[0014] Optionally, an air guide bracket is provided inside the main body relative to the air outlet. The air guide bracket is located at the air outlet position of the handle air duct. The air duct of the main body includes an annular air duct. An annular guide strip is provided in the air guide bracket. The handle air duct is connected to the air duct of the main body through the air guide bracket. The bottom end of the annular guide strip is provided with a guide angle relative to the handle air duct.

[0015] According to the above technical solution, by setting the guide angle, the air outlet of the handle air duct can be guided to be evenly separated and flow smoothly along the annular guide strip to the annular air duct, reducing the generation of collisions and turbulence, thereby reducing noise.

[0016] Optionally, the guide angle is a V-shaped angle.

[0017] According to the above technical solution, the tip of the V-shaped angle can more evenly distribute the airflow of the handle duct to both sides, further ensuring the diversion effect.

[0018] Optionally, a baffle plate is provided at the top of the annular guide strip, and the baffle plate extends toward the air outlet.

[0019] According to the above technical solution, by using a baffle plate at the top of the annular guide strip, the split airflows on both sides of the annular guide strip will contact the baffle plate when they reach the top of the annular guide strip, thus avoiding collision between the two split airflows at the top and reducing noise. At the same time, the baffle plate extending along the direction of the air outlet can guide the airflow smoothly to the air outlet, making the airflow more unobstructed.

[0020] Optionally, the air guide bracket is tilted relative to the handle air duct, and the tilting direction is towards the air outlet side in the direction of air duct travel.

[0021] According to the above technical solution, by tilting the air guide bracket, the airflow path is lengthened, which reduces the airflow velocity along the tilted surface and increases the static pressure at the top of the air guide bracket. This allows the airflow to flow smoothly along the tilted surface of the air guide bracket, thus ensuring that the airflow is evenly guided to the annular duct. Simultaneously, the airflow flows smoothly along the tilted surface of the air guide bracket and converges at the top before smoothly changing direction, thereby reducing noise generation.

[0022] Optionally, the main air duct also includes a central air duct located at the center of the annular air duct, and an ion generator is installed in the central air duct.

[0023] According to the above technical solution, the airflow passing through the central air duct can carry the ions generated by the ion generator and blow them out from the air outlet, thereby providing ion wind blowing. Attached Figure Description

[0024] Figure 1 This is a cross-sectional structural diagram of the hair dryer in an embodiment of this utility model;

[0025] Figure 2 This is a cross-sectional structural diagram of the main body of the hair dryer in an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the air inlet structure in the prior art;

[0027] Figure 4 This is a schematic diagram of the air inlet structure in an embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram showing the positions of the air inlet and the fan in an embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram of the handle air duct and air guide bracket in the prior art;

[0030] Figure 7 This is a schematic diagram of the handle air duct and air guide bracket in an embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional structural diagram of a hair dryer in the prior art.

[0032] Reference numerals: Hair dryer 100, main body 10, annular air duct 101, central air duct 102, air outlet 11, air outlet 111, air outlet 112, air guide bracket 12, annular guide strip 121, guide angle 122, wind baffle 123, ventilation inlet 124, heating component 13, heating bracket 131, cover 14, circuit accommodating cavity 15, ion generator 16, negative ion bracket 161, high voltage generator 162, handle 20, air inlet 21, rounded corner 211, handle air duct 22, fan 23, sleeve 24, handle body 25, air inlet 201, handle air duct 202, air guide bracket 203. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] refer to Figure 1 The hair dryer 100 in this embodiment includes a main body 10, a handle 20, and an air duct.

[0035] Specifically, the main body 10 and the handle 20 constitute the external shape of the hair dryer. The main body 10 is a hollow shell arranged in the front-to-back direction, and an air outlet 11 is opened at the front end of the main body 10.

[0036] like Figure 1 As shown, in this embodiment, the air outlet 11 includes an air outlet 111 corresponding to one air duct in the main body, and an air outlet 112 located in the center corresponding to another air duct in the main body.

[0037] The handle 20 is connected to the main body 10. The handle 20 has an air inlet 21, through which air can be drawn in and blown out through the air outlet 11 of the main body 10.

[0038] refer to Figure 1 and Figure 2 The air duct connects the air inlet 21 and the air outlet 11, and includes a main body air duct located inside the main body 10 and a handle air duct 22 located inside the handle and connected to the main body air duct.

[0039] Specifically, the main body air duct includes an annular air duct 101, which is arranged relative to the air outlet 111. A fan 23 is provided in the handle air duct 22. The fan 23 can drive air to enter from the air inlet 21 and flow through the handle air duct 22 and the annular air duct 101 to the air outlet 111, and then blow it forward from the air outlet 111.

[0040] In this embodiment, the handle 20 includes a sleeve 24 and a handle body 25 disposed in the sleeve 24. The end of the sleeve 24 away from the main body 10 extends radially inward and is bent in a direction away from the main body 10 to form an air inlet 21. The inlet edge of the air inlet 21 is rounded 211.

[0041] Further, refer to Figure 3 In traditional hand-held air inlet hair dryers, a straight-tube air duct design is usually used. When the airflow passes through the sharp edge of the air inlet 201, the flow will change abruptly, thus forming a vortex and generating vortex noise.

[0042] refer to Figure 4 In this embodiment, by setting the inlet edge of the air inlet 21 to a rounded corner, the airflow can be guided to flow smoothly along the wall during air intake, eliminating abrupt flow changes, reducing the generated vortices, and thus reducing the corresponding noise. Furthermore, in this embodiment, the rounded corner is R2mm or more to ensure that the incoming airflow can flow smoothly along the wall, thereby reducing noise.

[0043] Furthermore, in traditional hand-held air inlet blowers, the blower is usually close to the air inlet (e.g., 21mm), and the diameter of the air inlet is relatively large (e.g., 31mm). This makes it difficult for a large amount of airflow to diffuse evenly before entering the blower, resulting in turbulent airflow. Turbulent airflow will impact the blower blades and generate noise. At the same time, the asymmetrical impact of non-uniform airflow on the blower blades will further cause mechanical vibration noise.

[0044] refer to Figure 5 In this embodiment, the distance L1 between the air inlet end of the fan 23 and the air inlet 21 is set to 35mm-43mm, and the diameter L2 of the air inlet is set to 22mm-26mm.

[0045] In this embodiment, by shortening the diameter of the air inlet 21 to constrain the air intake volume, and at the same time increasing the distance between the fan 23 and the air inlet 21, the airflow development section is extended, so that the airflow can be fully diffused before entering the fan 23, and the airflow can flow to the fan 23 in a uniform and smooth manner, thereby reducing the intensity of turbulence and reducing the noise generated by the airflow impacting the fan 23 blades; at the same time, the impact distribution of the uniform airflow on the fan 23 blades will also be symmetrical, further suppressing mechanical vibration noise.

[0046] Furthermore, the main body 10 has an air guide bracket 12 inside relative to the air outlet 11. The air guide bracket 12 is located at the air outlet position of the handle air duct 22. The air guide bracket 12 has an annular guide strip 121. The handle air duct 22 is connected to the annular air duct 101 in the air duct of the main body through the air guide bracket 12.

[0047] Specifically, air is drawn in from the air inlet 21 by the fan 23, enters the air guide bracket 12 through the handle air duct 22, is guided by the annular guide strip 121 on the air guide bracket 12 and enters the annular air duct 101, and is blown out from the air outlet 111.

[0048] refer to Figure 6 In traditional hand-operated air intake hair dryers, the connection area between the handle air duct 202 and the main body annular air duct has a sudden change in cross-section, which will cause a sudden increase in airflow velocity and thus generate aerodynamic noise.

[0049] In this embodiment, the handle air duct 22 is configured as a flared air duct that gradually expands directly towards the main body 10 without narrowing. By using a flared air duct that gradually expands, the airflow velocity can be reduced, allowing the fluid in the handle air duct 22 to flow smoothly to the air guide bracket 12, thereby avoiding noise caused by a sudden increase in flow velocity.

[0050] Further, refer to Figure 6 In the traditional handle-type air intake structure, the air intake of the handle air duct 202 is guided to the annular air duct of the main body through the annular air guide bracket 203. However, the airflow direction at the lower end of the air guide bracket 203 is disordered, which can easily cause collisions and form turbulence, generating noise.

[0051] In this embodiment, the bottom end of the annular guide strip 121 is provided with a V-shaped guide angle 122 relative to the handle air duct 22. By providing a V-shaped guide angle 122 on the annular guide strip 121 of the air guide bracket 12 corresponding to the air outlet position of the handle air duct 22, the tip of the guide angle 122 can guide the fluid to flow along the annular guide strip 121 after being evenly separated, reducing the generation of collisions and turbulence, thereby reducing noise.

[0052] Further, refer to Figure 6 In traditional hand-held air intake hair dryers, the top of the air guide bracket 203 has no windproof structure. The two airflows that have been split at the bottom of the air guide bracket 203 will collide directly at the top, generating noise.

[0053] In this embodiment, a baffle plate 123 is provided at the top of the annular guide strip 121, so that when the split airflows on both sides of the annular guide strip 121 reach the top of the annular guide strip 121, they will contact the baffle plate 123 respectively, avoiding the two split airflows from colliding at the top, thereby reducing noise. At the same time, the baffle plate 123 extends along the direction of the air outlet 11, which can guide the air in contact with the baffle plate 123 to flow smoothly to the air outlet 11, making the airflow smoother.

[0054] Further, refer to Figure 8In traditional hand-held air-inlet hair dryers, the air guide bracket 203 is always vertically positioned, guiding the vertical airflow from the handle duct into horizontal airflow within the annular duct of the main body. With this vertical structure, the vertical airflow from the handle duct flows rapidly along the guide bracket 203 and undergoes a vertical turn at the top. This airflow guidance structure results in chaotic airflow diffusion, making it difficult to guide the vertical airflow from the handle duct into uniform horizontal airflow within the annular duct, leading to uneven airflow from the hair dryer. Furthermore, directly turning the vertical airflow vertically into horizontal airflow can easily cause airflow impact, thus generating noise.

[0055] refer to Figure 2 In this embodiment, the air guide bracket 12 is inclined relative to the handle air duct 22. The air guide bracket 12 is inclined with its top facing the air outlet 11, and the inclination direction is towards the air outlet 11 in the direction of air duct travel. By inclining the air guide bracket 12, the airflow path is lengthened, resulting in a corresponding decrease in the airflow velocity along the inclined surface and a corresponding increase in the static pressure at the top of the air guide bracket 12. This allows the airflow to flow smoothly along the inclined surface of the air guide bracket 12, leading to more uniform airflow diffusion and a more even annular airflow guided by the air guide bracket 12. Simultaneously, the inclined air guide bracket 12 guides the airflow to flow smoothly along its inclined surface and converges at the top of the air guide bracket 12 before smoothly turning, thereby reducing noise generation.

[0056] In addition, refer to Figure 2 In this embodiment, a heating component 13 is provided between the air guide bracket 12 and the air outlet 11. The heating component 13 is arranged around the annular air duct 101 to heat the flowing air. Specifically, a heating bracket 131 is also provided between the air outlet 11 and the air guide bracket 12. The heating component 13 is arranged around the heating bracket 131 and correspondingly placed in the annular air duct 101. The fan 23 drives the air to enter through the air inlet 21, and guides it through the handle air duct 22 and the air guide bracket 12 to the annular air duct 101. After being heated by the heating component 13, it forms hot air and is blown out from the air outlet 111.

[0057] The rear end of the main body 10 is provided with a cover 14, and a circuit accommodating cavity 15 is provided between the cover 14 and the air guide bracket 12 for mounting the control circuit board. The air guide bracket 12 is provided with an air inlet hole (not shown in the figure) below the tip of the air guide angle 122. The air from the handle air duct 22 outlet can flow into the circuit accommodating cavity 15 of the main body 10 through the air inlet hole in an unheated state to dissipate heat from the various components installed in the circuit accommodating cavity 15.

[0058] An ion generator 16 is also provided between the air guide bracket 12 and the air outlet 11. In this embodiment, the ion generator 16 is a mineral ion generator. The ion generator 16 is positioned on the inner side of the annular guide strip 121 of the air guide bracket 12, and a ventilation inlet 124 is provided on the inner side of the annular guide strip 121 corresponding to the ion generator 16. The ventilation inlet 124 is connected to the circuit accommodating cavity 15, and the ventilation inlet 124 corresponds to the second air outlet 112. The ion generator 16 is located between the ventilation inlet and the second air outlet 112.

[0059] In this embodiment, the heating bracket 131 is also provided with a negative ion bracket 161 and a high voltage generator 162. The ion generator 16 is installed in the negative ion bracket 161 and connected to the high voltage generator 162. At the same time, the high voltage generator 162 is connected to the control circuit board in the circuit accommodating cavity 15.

[0060] Furthermore, the main body air duct also includes a central air duct 102 located at the center of the annular air duct 101. The ion generator 16, the ventilation inlet 124, and the second air outlet 112 are all placed in the central air duct 102. After part of the air flowing out of the handle air duct 22 enters the circuit accommodating cavity 15, it will enter the central air duct 102 through the ventilation inlet 124 and carry the ions generated by the ion generator 16, and be blown out from the second air outlet 112.

[0061] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hair dryer, characterized in that, include: The main body has an air outlet at its front end; A handle, connected to the main body, has an air inlet; The air duct, connecting the air inlet and the air outlet, includes a main body air duct located inside the main body and a handle air duct located inside the handle and connected to the main body air duct. The handle air duct is configured as a flared air duct that gradually expands directly towards the main body without narrowing.

2. The hair dryer as described in claim 1, characterized in that, The handle includes a sleeve and a handle body disposed within the sleeve. The end of the sleeve away from the main body extends radially inward and is bent away from the main body to form the air inlet. The inlet edge of the air inlet is rounded.

3. The hair dryer as described in claim 2, characterized in that, The fillet radius is R2mm or more.

4. The hair dryer as described in claim 1, characterized in that, The handle air duct is equipped with a fan, and the distance between the air inlet end of the fan and the air inlet is 35mm-43mm.

5. The hair dryer as described in claim 4, characterized in that, The diameter of the air inlet is 22mm-26mm.

6. The hair dryer as described in claim 1, characterized in that, An air guide bracket is provided inside the main body relative to the air outlet, and the air guide bracket is located at the air outlet position of the handle air duct. The main body air duct includes an annular air duct, the air guide bracket is provided with an annular guide strip, the handle air duct is connected to the main body air duct through the air guide bracket, and the bottom end of the annular guide strip is provided with a guide angle relative to the handle air duct.

7. The hair dryer as described in claim 6, characterized in that, The guide angle is a V-shaped angle.

8. The hair dryer as described in claim 6, characterized in that, The top of the annular guide strip is provided with a baffle plate, which extends toward the air outlet.

9. The hair dryer as described in claim 6, characterized in that, The air guide bracket is inclined relative to the handle air duct, and the inclination direction is towards the air outlet side in the direction of air duct travel.

10. The hair dryer as described in claim 6, characterized in that, The main body air duct also includes a central air duct located at the center of the annular air duct, and an ion generator is provided in the central air duct.

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