An axial flow air duct and a heating air duct device and a blowing module and a hair dryer

Abstract

This utility model discloses an axial flow air duct, a heating air duct device, a blower module, and a blower. The axial flow air duct includes an inner cylinder and an outer cylinder. The inner cylinder has an axial channel, and several diversion channels are provided between the inner and outer cylinders. The heating air duct device, the blower module, and the blower all include the axial flow air duct. This axial flow air duct can guide the airflow, especially eliminating the noise generated by high-speed airflow, thus having a noise reduction effect. The heating air duct device, because it uses an axial flow air duct, can uniformly heat the passing airflow, and the heating speed is fast. The blower module and blower are small in size and light in weight, making them easy to use. In particular, they can be equipped with a high-speed, high-volume fan for fast drying. At the same time, the noise is low, far lower than that of traditional blowers. Moreover, the power consumption is low for the same air volume and temperature, resulting in low overall product cost.

Description

Technical Field

[0001] This utility model relates to the technical field of hair dryers, specifically an axial flow air duct and heating air duct device, a blower module, and a hair dryer. Background Technology

[0002] Traditional hair dryers use a fan to generate airflow that blows hot air onto a heating element, which then blows it out. However, the airflow is small and the heating is uneven, resulting in a long drying time. Increasing the airflow increases the size and weight of the hair dryer, making it less convenient to use, and it is also very noisy, resulting in a poor user experience.

[0003] Therefore, the aforementioned technical problems need to be solved. Summary of the Invention

[0004] This utility model addresses the above-mentioned technical problems by providing an axial flow air duct, a heating air duct device, a blower module, and a blower. The axial flow air duct guides airflow, effectively eliminating noise generated by high-speed airflow, thus reducing noise. The heating air duct device, using an axial flow air duct, heats the passing airflow evenly and quickly. The blower module and blower are small, lightweight, and easy to use. They can be equipped with a high-speed, high-volume fan for rapid drying. Simultaneously, they operate with low noise, significantly lower than traditional blowers. Furthermore, they have low power consumption for the same airflow and temperature, resulting in lower overall product cost.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An axial flow duct includes an inner cylinder and an outer cylinder, wherein the inner cylinder has an axial channel and a plurality of diversion channels are provided between the inner cylinder and the outer cylinder.

[0007] The axial flow duct's central channel and branch channels simultaneously guide the airflow, resulting in a more uniform and smooth airflow. When the high-speed airflow changes from a single stream to a multi-channel outlet via the central channel and several branch channels, jet noise is generated, and its spectrum shifts towards ultra-high frequencies. However, the human ear is not sensitive to ultra-high frequency sounds, and ultra-high frequency sound waves attenuate rapidly in the air. Furthermore, the multi-channel design itself provides some resistive noise reduction. Therefore, this axial flow duct effectively reduces noise.

[0008] A further optimized design includes several conductive gaps on the inner cylinder connecting the central channel and the diversion channel. These conductive gaps allow for the exchange of airflow between the central channel and the diversion channel, altering the propagation path of the airflow in different channels. This causes sound waves to reflect, interfere, and cancel out phases during propagation, thereby reducing noise at specific frequencies.

[0009] To further optimize the design, the partition wall of the diversion channel at the air inlet end of the axial flow duct is provided with an arc-shaped guide end. The arc-shaped guide end makes the air inlet form a large nozzle with high-speed airflow, which is beneficial for air intake; at the same time, the high-speed airflow enters the small nozzles of the multi-channel system from the large nozzle, generating jet noise and forming ultra-high frequency sound, which reduces wind noise to the human ear.

[0010] To further optimize the design, an air outlet cover is provided at the air outlet end of the inner cylinder to close or partially close the axial channel. By setting the air outlet cover, the airflow path in the axial channel and each branch channel can be changed, thereby reducing noise at specific frequencies; the size of the air outlet cover can also be changed to partially close the axial channel, thus altering the airflow path.

[0011] A further optimization of the design involves using an axial or spiral-shaped flow divider. By altering the shape of the flow divider, the path of the high-speed airflow within it is changed, thereby reducing noise.

[0012] A further optimized design includes several outwardly extending heat-conducting fins on the outer cylinder, and a non-penetrating annular cavity extending from one end of the outer cylinder to the other. The inclusion of these heat-conducting fins further enhances the thermal conductivity of the axial flow duct.

[0013] A heating air duct device includes a heating device mounted on any of the aforementioned axial flow air ducts. This heating air duct device, due to the use of an axial flow air duct, can uniformly heat the passing airflow, and the heating speed is fast.

[0014] In a further optimized design, the heating device is ring-shaped and fitted onto the outside of the axial flow duct.

[0015] A heating air duct device includes the aforementioned axial flow air duct, and an annular heating device adapted therein is provided in the annular cavity.

[0016] A further optimized design includes two axial flow ducts whose annular cavities are combined to form a closed cavity, within which an annular heating device is housed, forming an inner axial assembly. This heating duct device is suitable for high-power heating devices.

[0017] The further optimized solution also includes an outer sleeve, which is fitted over the two axial flow guide pipes to form a axially connected outer sleeve;

[0018] Several of the heat-conducting fins extend in a direction parallel to the axial direction, and an outer ring diversion channel is formed between the inner wall of the outer sleeve, the heat-conducting fins and the outer wall of the outer cylinder.

[0019] Several of the aforementioned heat-conducting fins extend in a direction parallel to the axial direction, and an outer ring flow channel is formed between the inner wall of the outer sleeve, the heat-conducting fins, and the outer wall of the outer cylinder. The outer ring flow channel is provided to further enhance heat conduction and reduce noise.

[0020] A blower module includes the aforementioned heating air duct device, positioning cylinder and axial flow fan, wherein the heating air duct device is installed at one end of the positioning cylinder and the axial flow fan is installed at the other end.

[0021] This drying module is small in size and light in weight. In particular, it can be equipped with a high-speed, high-volume fan, which dries quickly and with low noise.

[0022] A hair dryer includes the aforementioned blower module and housing, wherein the blower module is disposed within the housing.

[0023] This hair dryer is small and lightweight, making it easy to use. In particular, it can be equipped with a high-speed, high-volume fan for fast drying. It is also quiet, much quieter than traditional hair dryers. Moreover, it has low power consumption for the same air volume and temperature, resulting in low overall product cost.

[0024] In a further optimized design, the outer shell includes a main body and a handle. The blower module is located inside the main body, and a circuit board module is installed inside the handle.

[0025] The axial flow fan end of the main body is provided with a main air inlet, and the handle part is provided with a secondary air inlet duct.

[0026] This hair dryer features a main air inlet and a secondary air inlet duct. Insufficient airflow from the axial fan can cause noise, but the two air inlets ensure sufficient airflow for the axial fan, preventing noise issues caused by insufficient airflow. The secondary air inlet duct not only assists the main air inlet but also provides cooling for the circuit board module. The circuit board module is snapped into the handle of the housing for easy installation; furthermore, the circuit board module reduces wind noise within the secondary air inlet duct compared to a single circuit board.

[0027] Further optimization of the solution also includes a heat insulation sleeve, which is sleeved on the outside of the heating device and connected to the outside of the positioning cylinder.

[0028] In a further optimized design, an insulating and heat-insulating filler is provided between the blower module and the outer casing.

[0029] This utility model has the following technical advantages compared with the prior art:

[0030] This axial flow duct can guide airflow, and in particular, it can eliminate the noise generated by high-speed airflow, thus having a noise reduction effect.

[0031] This heating air duct device uses an axial flow air duct, which can heat the passing airflow evenly and quickly.

[0032] This blower module and blower are small in size and light in weight, making them easy to use. In particular, they can be equipped with a high-speed, high-volume fan for fast drying. They are also quiet, much quieter than traditional blowers. Moreover, they have low power consumption for the same air volume and temperature, resulting in low overall product cost. Attached Figure Description

[0033] Figure 1 This is a perspective view of the first embodiment of the axial flow guide duct of this utility model;

[0034] Figure 2 yes Figure 1 A stereoscopic view from another perspective;

[0035] Figure 3 yes Figure 2 The right view;

[0036] Figure 4 This is a perspective view of the second embodiment of the axial flow guide duct of this utility model;

[0037] Figure 5 yes Figure 4 The left view;

[0038] Figure 6 yes Figure 4 A stereoscopic view from another perspective;

[0039] Figure 7 yes Figure 6 The left view;

[0040] Figure 8 This is a perspective view of the heating air duct device using the axial flow air duct of the second embodiment;

[0041] Figure 9 yes Figure 8 Exploded view;

[0042] Figure 10 This is a perspective view of the heating air duct device using the axial flow air duct of the first embodiment;

[0043] Figure 11 yes Figure 10 A stereoscopic view from another perspective;

[0044] Figure 12 It is an application Figure 10 A 3D view of the air blowing module of the heating air duct device;

[0045] Figure 13 yes Figure 12 A stereoscopic view from another perspective;

[0046] Figure 14 yes Figure 13 Exploded view;

[0047] Figure 15 It is an application Figure 12 A 3D view of the hair dryer in the blower module;

[0048] Figure 16 yes Figure 15 A stereoscopic view from another perspective;

[0049] Figure 17 yes Figure 16 A 3D image with half of the outer shell removed;

[0050] Figure 18 yes Figure 15 Exploded view.

[0051] In the diagram: axial flow duct 10, air outlet cover 11, inner cylinder 12, outer cylinder 13, axial channel 14, diversion channel 15, conduction gap 16, guide end 17, heat-conducting fins 18, annular cavity 19, heating duct device 20, heating device 21, outer sleeve 22, outer ring diversion channel 23, blowing module 30, positioning cylinder 31, axial flow fan 32, outer shell 40, main body 41, handle 42, main air inlet 43, secondary air inlet duct 44, circuit board module 50, heat insulation sleeve 60, outlet air guide ring 70, inspection cover 80. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0053] like Figures 1 to 3 As shown, this is the first embodiment of the axial flow guide duct of the present invention.

[0054] like Figures 4 to 7 As shown, this is the second embodiment of the axial flow guide duct of the present invention.

[0055] like Figures 8 to 9 As shown, one specific embodiment of the heating air duct device of this utility model applies the axial flow air duct of the second embodiment.

[0056] like Figures 10 to 11 As shown, another specific embodiment of the heating air duct device of this utility model applies the axial flow air duct of the first embodiment.

[0057] like Figures 12 to 14 As shown, a specific embodiment of the blower module of this utility model is applied. Figure 10 The heating air duct device shown.

[0058] like Figures 15 to 18 As shown, a specific embodiment of the hair dryer of this utility model is applied. Figure 12 The blower module shown.

[0059] like Figures 1 to 3As shown, the axial flow duct 10 of the first embodiment includes an inner cylinder 12 and an outer cylinder 13. The inner cylinder 12 is provided with an axial channel 14, and a plurality of diversion channels 15 are provided between the inner cylinder 12 and the outer cylinder 13. The plurality of diversion channels 15 are equally distributed around the axial channel 14. The axial flow duct 10 is made of aluminum alloy superconducting thermal material and has good thermal conductivity.

[0060] The axial flow duct 10's central channel 14 and branch channels 15 simultaneously guide the airflow, making the airflow more uniform and smooth. When the high-speed airflow changes from a single stream to a multi-channel outlet via the central channel 14 and several branch channels 15, jet noise is generated, and its spectrum shifts towards ultra-high frequencies. However, the human ear is not sensitive to ultra-high frequency sounds, and ultra-high frequency sound waves attenuate rapidly as they propagate through the air. At the same time, the multi-channel design itself also has a certain resistive noise reduction effect. Therefore, the axial flow duct 10 has the function of reducing noise.

[0061] like Figures 1 to 3 As shown, the inner cylinder 12 is provided with several conductive gaps 16 that connect the axial channels 14 and the diversion channels 15. The conductive gaps 16 can realize the mutual exchange of airflow in the axial channels 14 and the diversion channels 15, change the propagation path of the airflow in different channels, and cause the sound waves to be reflected, interfered and phase canceled during propagation, thereby reducing noise at specific frequencies.

[0062] The conduction gap 16 between the diversion channel 15 and the axial channel 14 can be set continuously or intermittently, depending on the actual needs. The purpose is to change the airflow path and reduce noise.

[0063] like Figure 1 As shown, the partition wall of the diversion channel 15 at the air inlet end of the axial flow duct 10 is provided with an arc-shaped guide end 17. The arc-shaped guide end 17 makes the air inlet form a large nozzle with high-speed airflow, which is conducive to air intake; at the same time, the high-speed airflow enters the small nozzle of the multi-channel through the large nozzle to generate jet noise and form ultra-high frequency sound, which reduces wind noise to the human ear.

[0064] like Figure 3 As shown, the air outlet end of the inner cylinder 12 is provided with an air outlet cover 11 to close or partially close the axial channel 14. By setting the air outlet cover 11, the airflow path in the axial channel 14 and each diversion channel 15 can be changed, thereby reducing noise at a specific frequency; the size of the air outlet cover 11 can also be changed to partially close the axial channel 14 to change the airflow path.

[0065] like Figure 3 As shown, the flow divider 15 is axial. Alternatively, the flow divider 15 can also be spiral-shaped. By changing the shape of the flow divider 15, the path of the high-speed airflow within it is altered, thereby reducing noise.

[0066] The number of splitter channels 15 is 5 to 17, preferably 11 to 13. An appropriate number of splitter channels 15 can be set according to the actual situation to achieve the best noise reduction effect. For example... Figure 3 As shown, the number of diversion channels 15 in this embodiment is 13.

[0067] like Figures 4 to 7 As shown, the axial flow guide duct 10 of the second embodiment differs from that of the first embodiment in the following aspects:

[0068] First, the conductive gap 16 connecting the axial channel 14 and the diversion channel 15 was removed;

[0069] In addition, the outer cylinder 13 is provided with several outwardly extending heat-conducting fins 18, and one end of the outer cylinder 13 is provided with a non-penetrating annular cavity 19 extending to the other end. The provision of several heat-conducting fins 18 further enhances the heat conduction capacity of the axial flow duct 10.

[0070] This utility model also discloses a heating air duct device 20, such as Figure 10 and Figure 11 As shown, the heating air duct device 20 of this embodiment uses the axial flow air duct 10 of the first embodiment and is further provided with a heating device 21, which is sleeved on the outside of the axial flow air duct 10. Because the heating air duct device 20 uses the axial flow air duct 10, it can uniformly heat the passing airflow, and the heating speed is fast.

[0071] The heating device 21 is made of nano-rare earth heating material. The heating device 21 made of nano-rare earth heating material has high heating efficiency and fast heat conduction speed.

[0072] like Figure 8 and Figure 9 As shown, another embodiment of the heating air duct device 20 includes two axial flow air ducts 10 of the second embodiment, a heating device 21, and an outer sleeve 22. The two axial flow air ducts 10 are fitted inside the outer sleeve 22 to form a axially connected outer sleeve. A matching annular heating device 21 is provided in an annular cavity 19. The two annular cavities 19 are combined opposite each other to form a closed cavity. The annular heating device 21 is disposed in the closed cavity to form an inner axially connected body. Half of the heating device 21 is fitted inside the annular cavity 19 of one of the axial flow air ducts 10, and the other half is fitted inside the annular cavity 19 of the other axial flow air duct 10. This embodiment of the heating air duct device 20 is suitable for high-power heating devices 21.

[0073] like Figure 8 and Figure 9As shown, several heat-conducting fins 18 extend in a direction parallel to the axial direction, and an outer ring flow channel 23 is formed between the inner wall of the outer sleeve 22, the heat-conducting fins 18, and the outer wall of the outer cylinder 13. The outer ring flow channel 23 is set to further enhance the heat conduction capacity and reduce noise.

[0074] This utility model also discloses a blower module 30, such as Figures 12 to 14 As shown, the blower module 30 in this embodiment includes Figure 10 The heating air duct device 20, the positioning cylinder 31 and the axial flow fan 32 shown are installed in the positioning cylinder 31. The heating air duct device 20 is installed at one end and the axial flow fan 32 is installed at the other end.

[0075] This blower module is small in size and light in weight. In particular, it can be equipped with a high-speed, high-volume fan, which dries quickly and with low noise.

[0076] This utility model also discloses a hair dryer, such as Figures 15 to 18 As shown, the hair dryer in this embodiment includes Figure 12 The device includes a blower module 30, a housing 40, a circuit board module 50, a heat insulation sleeve 60, an outlet air guide ring 70, and a maintenance cover 80. The housing 40 includes a main body 41 and a handle 42. The blower module 30 is installed inside the main body 41, and the circuit board module 50 is installed inside the handle 42. The axial flow fan end of the main body 41 is provided with a main air inlet 43, and the handle 42 is provided with a secondary air inlet duct 44. The housing 40 is formed by connecting the two halves together.

[0077] This hair dryer is equipped with a main air inlet 43 and a secondary air inlet duct 44. Insufficient airflow from the axial fan can cause wind noise. The two air inlets ensure sufficient airflow for the axial fan, preventing wind noise caused by insufficient airflow. The secondary air inlet duct 44 not only assists the main air inlet 43 in airflow but also provides heat dissipation for the circuit board module 50. The circuit board module 50 is snapped into the handle portion 42 of the housing for easy installation. Moreover, the circuit board module 50 reduces wind noise within the secondary air inlet duct 44 compared to a single circuit board.

[0078] like Figure 15 and Figure 17 As shown, the heat insulation sleeve 60 is sleeved outside the heating device 21 and connected to the outside of the positioning cylinder 31; the outlet air guide ring 70 is fastened to the air outlet end of the heat insulation sleeve 60; the maintenance cover 80 is located at the rear of the outer shell 40 and covers the axial flow fan 32; the main air inlet is set on the maintenance cover 80.

[0079] In addition, an insulating and heat-insulating filler, such as heat-resistant foamed silicone, can be provided between the blower module 30 and the outer casing 40.

[0080] This axial flow duct can guide airflow, and in particular, it can eliminate the noise generated by high-speed airflow, thus having a noise reduction effect.

[0081] This heating air duct device uses an axial flow air duct, which can heat the passing airflow evenly and quickly.

[0082] This blower module and blower are small in size and light in weight, making them easy to use. In particular, they can be equipped with a high-speed, high-volume fan for fast drying. They are also quiet, much quieter than traditional blowers. Moreover, they have low power consumption for the same air volume and temperature, resulting in low overall product cost.

[0083] In specific embodiments, the weight of this hair dryer can be as low as 200-280g, far lower than the 380-580g of other products in the industry; it can be equipped with an axial flow fan with a speed of 130,000 RPM, with a maximum wind speed of 65.8 meters per second; and the noise level is only 58-65dB, far lower than the noise level of traditional hair dryers (85-90dB); under the same air volume and outlet temperature, the power is only 600 watts, while traditional hair dryers consume 1500-2000 watts; it supports continuous blowing for extended periods, and the heating module has a long service life, theoretically supporting continuous operation for 10 years without any reduction in heating efficiency; the product cost is low, far lower than the cost of hair dryers with similar performance.

[0084] In summary, as described in the specification and figures, this utility model has been manufactured into actual samples and subjected to multiple use tests. The test results demonstrate that this utility model achieves its intended purpose, and its practicality is beyond doubt. The embodiments described above are merely for illustrative purposes and are not intended to limit the scope of this utility model. Any equivalent embodiments made by those with common knowledge in the relevant technical field, utilizing the technical content disclosed in this utility model, without departing from the scope of the technical features and similar features disclosed in this utility model, are all within the protection scope of this utility model.

Claims

1. An axial flow duct (10), characterized in that: The axial flow duct (10) includes an inner cylinder (12) and an outer cylinder (13). The inner cylinder (12) is provided with an axial channel (14), and a number of diversion channels (15) are provided between the inner cylinder (12) and the outer cylinder (13).

2. The axial flow guide duct (10) according to claim 1, characterized in that, The inner cylinder (12) is provided with a plurality of conductive gaps (16) that connect the axial channel (14) and the diversion channel (15).

3. The axial flow duct (10) according to claim 1, characterized in that, The partition wall of the diversion channel (15) at the air inlet end of the axial flow duct (10) is provided with an arc-shaped guide end (17).

4. The axial flow guide duct (10) according to claim 2, characterized in that, The air outlet end of the inner cylinder (12) is provided with an air outlet cover plate (11) to close or partially close the axial channel (14).

5. The axial flow guide duct (10) according to claim 1, characterized in that, The diversion channel (15) is axial or spiral.

6. The axial flow duct (10) according to claim 1, characterized in that, The outer cylinder (13) is provided with a number of outwardly extending heat-conducting fins (18), and one end of the outer cylinder (13) is provided with a non-penetrating annular cavity (19) extending to the other end.

7. A heating air duct device (20), characterized in that: The axial flow duct (10) according to any one of claims 1 to 5 is provided with a heating device (21).

8. The heating air duct device (20) according to claim 7, characterized in that, The heating device (21) is ring-shaped and is sleeved on the outside of the axial flow duct (10).

9. A heating air duct device (20), characterized in that: The axial flow duct (10) as described in claim 6 includes an annular heating device (21) adapted to the annular cavity (19).

10. The heating air duct device (20) according to claim 9, characterized in that: It includes two axial flow ducts (10) as described in claim 6, whose annular cavities (19) are combined to form a closed cavity, and an annular heating device (21) is disposed in the closed cavity to form an inner axial connector.

11. The heating air duct device (20) according to claim 10, characterized in that, It also includes an outer sleeve (22), which is fitted over the two axial flow guide pipes (10) to form a axially connected outer sleeve; A plurality of the heat-conducting fins (18) extend in a direction parallel to the axial direction, and an outer ring diversion channel (23) is formed between the inner wall of the outer sleeve (22), the heat-conducting fins (18) and the outer wall of the outer cylinder (13).

12. A blower module (30), characterized in that: It includes the heating air duct device (20), positioning cylinder (31) and axial flow fan (32) as described in claim 7, wherein the heating air duct device (20) is installed at one end of the positioning cylinder (31) and the axial flow fan (32) is installed at the other end.

13. A hair dryer, characterized in that: It includes the blower module (30) and housing (40) as described in claim 12, wherein the blower module (30) is disposed within the housing (40).

14. The hair dryer according to claim 13, characterized in that, The outer casing (40) includes a main body (41) and a handle (42). The blower module (30) is provided inside the main body (41), and the circuit board module (50) is fastened inside the handle (42). The main body (41) has a main air inlet (43) at the axial fan end, and the handle (42) has a secondary air inlet duct (44).

15. The hair dryer according to claim 13, characterized in that, It also includes a heat insulation sleeve (60), which is sleeved on the outside of the heating device (21) and connected to the outside of the positioning cylinder (31).

16. The hair dryer according to claim 13, characterized in that, An insulating and heat-insulating filler is provided between the blower module (30) and the outer shell (40).

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