Noise-reducing blower

Abstract

The utility model discloses a noise reduction hair drier which comprises a machine head and a handle, a fan and a heating module are arranged in the machine head, an air outlet piece corresponding to the heating module is arranged at the front end of the machine head, the air outlet piece is provided with an air outlet, and the air outlet extends outwards from the outer end face of the air outlet piece to form an extension channel. And air flow in the machine head flows out through the extension channel. According to the noise reduction blower, the extending channel extending outwards is arranged at the air outlet, when air flow is exhausted through the extending channel, the pressure difference between the inside and the outside of the air channel can be reduced, noise generated by air expansion at the air outlet is reduced, meanwhile, the extending channel prolongs the flowing path of the air flow, and noise is reduced. The noise of the fan and the fan in the machine head can be reduced, so that the working noise of the hair drier can be integrally reduced, and the use experience of a user is improved.

Description

Technical Field

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

[0002] When a hair dryer is working, outside air flows into the airflow duct of the casing from the air inlet, is heated by the heating element, and then flows out from the air outlet to provide hot or cold air to the user. Common hair dryers produce significant noise when expelling air. For example, the hair dryer disclosed in patent number CN202221456405.2 has multiple circumferentially spaced air outlets on the outlet cover to meet airflow needs. This airflow structure has a very short internal channel path for the air outlets, resulting in significant pressure changes inside and outside the outlets. The high-speed airflow easily generates considerable noise, and the noise from the fan and other components inside the head is also easily transmitted, leading to an overall high noise level. This not only affects the user experience but also potentially has a negative impact on the surrounding environment. Utility Model Content

[0003] This utility model provides a noise-reducing hair dryer, which aims to solve the technical problem that the internal path of the air outlet of existing hair dryers is relatively short, resulting in excessive noise during operation.

[0004] This utility model discloses a noise-reducing hair dryer, including a head and a handle. The head is equipped with a fan and a heating module. The front end of the head is equipped with an air outlet corresponding to the heating module. The air outlet has an air outlet, which extends outward from the outer end of the air outlet to form an extension channel, so that the airflow in the head flows out through the extension channel.

[0005] The noise-reducing hair dryer of this utility model also has the following additional technical features:

[0006] The width of the extended channel expands outward from the air outlet.

[0007] The heating module includes a bracket and a heating element wrapped around the bracket, and the projection of the air outlet toward the heating module is located on the heating element.

[0008] The length of the extended channel is not less than 3mm and not more than 15mm.

[0009] The extended channel is provided with multiple air outlets, and a partition rib is provided between adjacent air outlets. The top of the partition rib is provided with an air guide surface that is inclined towards the air outlet.

[0010] The extended channel is provided with multiple air outlets, which are arranged at intervals along the circumference of the air outlet component.

[0011] Each of the aforementioned air outlets is racetrack-shaped and extends in the radial direction of the air outlet component.

[0012] Each of the aforementioned air outlets is arc-shaped and extends along the circumferential direction of the air outlet component.

[0013] The air outlet component includes an outer fixing ring and an inner fixing seat located inside the outer fixing ring. The outer fixing ring and the inner fixing seat are connected by connecting ribs, and the air outlet is formed between adjacent connecting ribs. The inner fixing seat has an arc-shaped guide surface extending toward the air outlet.

[0014] The extended channel is provided with multiple air outlets, the maximum length of which is W1 and the maximum width of which is W2, and 1mm≤W2≤W1≤10mm.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects:

[0016] 1. The noise-reducing hair dryer of this utility model has an outward-extending channel at the air outlet. When the airflow is discharged through the extension channel, the pressure difference inside and outside the air duct can be reduced, thereby reducing the noise generated by gas expansion at the air outlet. At the same time, the extension channel prolongs the airflow path, which can reduce the transmission of noise from the fan and blower inside the head. Therefore, the overall operating noise of the hair dryer can be reduced, and the user experience can be improved.

[0017] 2. In order to improve noise reduction performance, the width of the extended channel is expanded outward from the air outlet, which helps to release the pressure at the air outlet position quickly, thereby further reducing the expansion noise of the gas at the air outlet position. In addition, it can also increase the diffusion area of ​​the exhaust airflow, which helps to improve the drying efficiency of the blower.

[0018] 3. To ensure the outlet air temperature and improve the drying efficiency of the hair dryer, the heating module includes a bracket and a heating element wrapped around the bracket. The projection of the air outlet toward the heating module is located on the heating element. Thus, by setting the air outlet directly opposite the heating element, the airflow heated by the heating element can be discharged more smoothly through the air outlet, and the heat loss of the discharged airflow is less, which can ensure the outlet air temperature and thus speed up the drying of wet hair. In addition, it is also conducive to smooth airflow near the heating element and prevents the heating element from overheating locally, which would affect its service life.

[0019] 4. To ensure noise reduction, the length of the extension channel should be no less than 3mm and no more than 15mm. This avoids the problem that an excessively short extension channel would not effectively reduce the pressure difference between the air outlet and the surrounding atmosphere, resulting in excessive expansion noise of the gas at the air outlet. At the same time, it avoids the problem that an excessively long extension channel would increase the axial dimension of the machine head, making it impossible to achieve miniaturization and portability of the machine.

[0020] 5. It is understandable that using small-hole air outlets is more conducive to noise reduction. In one solution, the extended channel is provided with multiple air outlets, and a partition rib is provided between adjacent air outlets. The top of the partition rib is provided with a guide surface that is inclined towards the air outlet. By setting the guide surface, the airflow can be guided to flow smoothly over the guide surface and then flow to the air outlet, which can reduce the kinetic energy loss of the gas and thus increase the air outlet speed.

[0021] 6. When the extended channel uses multiple air outlets, under the premise of meeting the air volume requirements, the noise inside the hair dryer will be reflected and canceled out by the small holes when it passes through the small holes, which helps to further reduce the transmission of noise from the hair dryer to the outside.

[0022] Multiple air outlets are arranged at intervals along the circumference of the air outlet component. The shape, size and arrangement of a single air outlet can be set according to actual needs to allow for flexible structural processing and improve the appearance of the blower.

[0023] 7. When a single air outlet is arc-shaped and extends along the circumferential direction of the air outlet component, the air outlet can be formed between the outer fixing ring and the inner fixing seat of the air outlet component. That is, the outer fixing ring and the inner fixing seat are connected by connecting ribs, and the air outlet is formed between adjacent connecting ribs. Furthermore, the inner fixing seat has an arc-shaped guide surface extending towards the air outlet. This arc-shaped guide surface can guide the airflow smoothly to the air outlet, which can reduce the kinetic energy loss of the gas and thus increase the air outlet speed.

[0024] 8. When the extended channel uses a small hole for air outlet, the maximum length of the air outlet is W1 and the maximum width is W2, with 1mm≤W2≤W1≤10mm. The advantage is that when the noise inside the hair dryer passes through the small hole of this size, the sound waves will be reflected and canceled out by each other inside the small hole, which helps to reduce the transmission of noise from inside the hair dryer to the outside. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0026] Figure 1 This is a cross-sectional structural diagram of the machine head according to one embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the layout of the air outlet in one embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the layout of the air outlet in another embodiment of this application.

[0029] Figure 4This is a schematic diagram of the air outlet component according to one embodiment of this application.

[0030] Figure label:

[0031] 10. Head unit; 11. Handle; 12. Fan; 13. Heating module; 131. Heating element; 14. Air outlet; 141. Air outlet; 142. Extension channel; 143. Air outlet hole; 144. Outer fixing ring; 145. Inner fixing seat; 1451. Arc-shaped guide surface; 15. Separating rib; 151. Air guide surface. Detailed Implementation

[0032] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0033] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0035] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through a transitional structure, but are connected solely by a connecting structure to form a whole. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0038] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] like Figures 1 to 4 As shown, this application provides a noise-reducing hair dryer, including a head 10 and a handle 11. The head 10 is provided with a fan 12 and a heating module 13. The front end of the head 10 is provided with an air outlet 14 corresponding to the heating module 13. The air outlet 14 is provided with an air outlet 141. The air outlet 141 extends outward from the outer end of the air outlet 14 to form an extension channel 142, so that the airflow in the head 10 flows out through the extension channel 142.

[0040] The noise-reducing hair dryer of this utility model has an outwardly extending channel 142 at the air outlet 141. When the airflow is discharged through the extension channel 142, the pressure difference inside and outside the air duct can be reduced, thereby reducing the noise generated by gas expansion at the air outlet 141. At the same time, the extension channel 142 extends the airflow path, which can reduce the transmission of noise from the fan 12 and fan inside the head 10. Therefore, the overall operating noise of the hair dryer can be reduced, and the user experience can be improved.

[0041] like Figure 1As shown, an extension channel 142 is provided at the rear end of the air outlet 141. The extension channel 142 can uniformly reduce the air pressure inside the blower, reducing pressure fluctuations inside and outside the end of the air outlet 141, thereby reducing gas expansion noise caused by pressure fluctuations. The length of the extension channel 142 is H, preferably 3mm≤H≤15mm. This avoids the extension channel 142 being too short, making it difficult to effectively reduce the pressure difference between the air outlet 141 and the surrounding atmosphere, resulting in excessive gas expansion noise at the air outlet 141. At the same time, it avoids the extension channel 142 being too long, which would increase the axial dimension of the head 10 and prevent the machine from being miniaturized and lightweight. While reducing airflow noise, the extension channel 142 can ensure that performance indicators such as wind speed are not reduced, thus ensuring the drying efficiency of the blower. The width of the channel formed by the extension channel 142 along the airflow direction remains unchanged or increases; this application does not limit this and it can be set according to actual needs.

[0042] In a preferred embodiment, the width of the extended channel 142 expands outward from the air outlet 141.

[0043] Specifically, in one embodiment, the width of the extension channel 142 gradually increases along the air outlet direction, which facilitates the rapid release of pressure at the air outlet 141, thereby further reducing the expansion noise of the gas at the air outlet 141. Furthermore, it increases the diffusion area of ​​the exhaust airflow, which helps improve the drying efficiency of the blower. Alternatively, in another embodiment, the width of the extension channel 142 has an abrupt change. The extension channel 142 includes a first segment and a second segment arranged sequentially along the air outlet direction, with the width of the second segment being greater than the width of the first segment. The second segment is the air outlet position, which reduces noise while improving air outlet efficiency.

[0044] In a preferred embodiment, the heating module 13 includes a bracket and a heating element 131 wrapped around the bracket, and the projection of the air outlet 141 toward the heating module 13 is located on the heating element 131.

[0045] like Figure 1 As shown, assuming the diameter of the circle containing the air outlet 141 is D1, the diameter of the largest circle after the heating element 131 is wound is D2, and the diameter of the smallest circle is D3, then D3≤D1≤D2, which allows the airflow heated by the heating element 131 to be discharged more smoothly through the air outlet 141, and the heat loss of the discharged airflow is less, which can ensure the outlet air temperature and thus accelerate the drying of wet hair; in addition, it is also conducive to smooth airflow near the heating element 131 and prevents the heating element 131 from overheating locally and affecting its service life.

[0046] In a preferred embodiment, the extension channel 142 is provided with a plurality of air outlets 143, which are arranged at intervals along the circumference of the air outlet component 14. When air is discharged through a plurality of air outlets 143, under the premise of meeting the air volume requirements, the sound waves inside the hair dryer will be reflected and canceled out by the small holes when they pass through the small holes, which helps to further reduce the transmission of internal noise of the hair dryer to the outside.

[0047] Specifically, in the first embodiment, each of the air outlets 143 is racetrack-shaped and extends in the radial direction of the air outlet 14.

[0048] like Figure 2 As shown, the air outlet area of ​​a single air outlet 143 is S1, the number of air outlets 143 is n1, and the area is set to 150mm. 2 ≤n1·S1≤400mm 2 Its advantage lies in the fact that the air outlet area within this range can ensure that the high-pressure airflow inside the blower is discharged smoothly, reducing the load on the blower, while also meeting the high airflow requirements of the blower.

[0049] Furthermore, the maximum length of a single air outlet 143 is W1 and the maximum width is W2. The setting is 1mm≤W2≤W1≤10mm. The advantage is that when the noise inside the hair dryer passes through the small hole of this size, the sound waves will be reflected and cancel each other out inside the small hole, which helps to reduce the transmission of noise from inside the hair dryer to the outside.

[0050] In the second embodiment, each of the air outlets 143 is arc-shaped and extends along the circumferential direction of the air outlet 14.

[0051] like Figure 3 As shown, the air outlet area of ​​a single air outlet 143 is S2, the number of air outlets 143 is n2, and the area is set to 150mm. 2 ≤n2·S2≤400mm 2 Compared to the first embodiment, the ventilation area of ​​a single hole is larger and the wind resistance is relatively smaller, resulting in a higher gas flow rate.

[0052] Furthermore, the air outlet component 14 includes an outer fixing ring 144 and an inner fixing seat 145 disposed inside the outer fixing ring 144. The outer fixing ring 144 and the inner fixing seat 145 are connected by connecting ribs, and the air outlet 143 is formed between adjacent connecting ribs. The inner fixing seat 145 has an arc-shaped guide surface 1451 extending toward the air outlet 143. Figure 1 and Figure 3 As shown in the embodiment, the multi-segment arc-shaped air outlet 143 is easy to process, and the arc-shaped guide surface 1451 can guide the airflow smoothly to the air outlet 143, which can reduce the kinetic energy loss of the gas and thus increase the air outlet speed.

[0053] In a preferred embodiment, the extension channel 142 is provided with a plurality of air outlets 143, and a partition rib 15 is provided between adjacent air outlets 143. The top of the partition rib 15 is provided with a guide surface 151 that is inclined toward the air outlet 143.

[0054] like Figure 4 As shown, by setting the air guide surface 151, the airflow can be guided to flow smoothly over the air guide surface 151 and then flow to the air outlet 143, which can reduce the kinetic energy loss of the gas and thus increase the air outlet speed.

[0055] The technical solutions protected by this utility model are not limited to the above embodiments. It should be noted that any combination of the technical solutions of any embodiment with one or more other embodiments is within the protection scope of this utility model. Although this utility model has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A noise-reducing hair dryer, comprising a head and a handle, wherein the head contains a fan and a heating module, and the front end of the head has an air outlet corresponding to the heating module, characterized in that, The air outlet is provided with an air outlet, which extends outward from the outer end of the air outlet to form an extension channel, so that the airflow in the head flows out through the extension channel.

2. The noise-reducing hair dryer according to claim 1, characterized in that, The width of the extended channel expands outward from the air outlet.

3. A noise-reducing hair dryer according to claim 1, characterized in that, The heating module includes a bracket and a heating element wrapped around the bracket, and the projection of the air outlet toward the heating module is located on the heating element.

4. A noise-reducing hair dryer according to claim 1, characterized in that, The length of the extended channel is not less than 3mm and not more than 15mm.

5. A noise-reducing hair dryer according to claim 1, characterized in that, The extended channel is provided with multiple air outlets, and a partition rib is provided between adjacent air outlets. The top of the partition rib is provided with an air guide surface that is inclined towards the air outlet.

6. A noise-reducing hair dryer according to claim 1, characterized in that, The extended channel is provided with multiple air outlets, which are arranged at intervals along the circumference of the air outlet component.

7. A noise-reducing hair dryer according to claim 6, characterized in that, Each of the aforementioned air outlets is racetrack-shaped and extends in the radial direction of the air outlet component.

8. A noise-reducing hair dryer according to claim 6, characterized in that, Each of the aforementioned air outlets is arc-shaped and extends along the circumferential direction of the air outlet component.

9. A noise-reducing hair dryer according to claim 8, characterized in that, The air outlet component includes an outer fixing ring and an inner fixing seat located inside the outer fixing ring. The outer fixing ring and the inner fixing seat are connected by connecting ribs, and the air outlet is formed between adjacent connecting ribs. The inner fixing seat has an arc-shaped guide surface extending toward the air outlet.

10. A noise-reducing hair dryer according to claim 1, characterized in that, The extended channel is provided with multiple air outlets, the maximum length of which is W1 and the maximum width of which is W2, and 1mm≤W2≤W1≤10mm.

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