Hair dryer

Abstract

A hair dryer, comprising a barrel (10), a handle (20), a rotating shaft (30), a fan (40), and electronic components (50). The barrel (10) is provided with an air cavity (10a); the handle (20) is provided with an accommodating cavity (20a) and a pressure relief port (20b) communicated with the accommodating cavity (20a); the rotating shaft (30) is provided with an inner cavity (30a), the barrel (10) and the handle (20) are rotatably connected by means of the rotating shaft (30), and the inner cavity (30a) is respectively communicated with the air cavity (10a) and the accommodating cavity (20a), such that an airflow path passing through the inner cavity (30a) and the accommodating cavity (20a) is formed between the air cavity (10a) and the pressure relief port (20b); the fan (40) is disposed in the air cavity (10a) and located on the airflow path; and the electronic components (50) are disposed in the accommodating cavity (20a) and located on the airflow path. The hair dryer has good heat dissipation performance.

Description

A hair dryer

[0001] Cross-reference of related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202422664477.1, filed on October 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of electrical equipment, and in particular to a hair dryer. Background Technology

[0004] In related technologies, some handheld hair dryers incorporate electronic components within the handle. For example, for convenience, a power module is typically housed within the handle for easy connection to a power cord. However, these electronic components, such as the power module, generate significant heat during operation. This is especially true in countries or regions using low voltage, where the hair dryer's circuitry is more complex, leading to even greater heat generation from the power module and other electronic components. Without proper heat dissipation, these components may exceed their operating temperature limits and be damaged. Summary of the Invention

[0005] In view of this, the embodiments of this application aim to provide a hair dryer with better heat dissipation performance.

[0006] To achieve the above objectives, embodiments of this application provide a hair dryer, comprising:

[0007] A ventilation duct with an air cavity;

[0008] A handle having a receiving cavity and a pressure relief port communicating with the receiving cavity;

[0009] A rotating shaft with an inner cavity is provided, and the air duct and the handle are rotatably connected through the rotating shaft. The inner cavity is connected to both the air cavity and the receiving cavity, so that an airflow path is formed between the air cavity and the pressure relief port, passing through the inner cavity and the receiving cavity.

[0010] A fan, wherein the fan is disposed within the air cavity and located on the airflow path;

[0011] Electronic components are disposed within the receiving cavity and located on the airflow path.

[0012] In one embodiment, the fan has an air outlet located upstream of the inner cavity along the airflow path.

[0013] In one embodiment, the rotating shaft is fixed to the air duct and rotatably connected to the handle.

[0014] In one embodiment, the rotating shaft includes a fixed part located inside the air cavity and a main body located outside the air duct. The fixed part is connected to the air duct, the main body is rotatably connected to the handle, and the inner cavity is disposed in the main body.

[0015] In one embodiment, the air duct has a clearance opening, and the rotating shaft includes a connecting portion located between the fixed portion and the main body portion and having a communicating channel. The connecting portion passes through the clearance opening, and the inner cavity communicates with the air cavity through the communicating channel.

[0016] In one embodiment, the hair dryer further includes a separator disposed on the airflow path;

[0017] The separator is located within the communicating channel, and the separator divides the communicating channel into a first airflow channel, which communicates with both the air cavity and the inner cavity; and / or,

[0018] The partition is located within the inner cavity, and the partition creates airflow channels within the inner cavity, the airflow channels being connected to both the connecting channel and the receiving cavity.

[0019] In one embodiment, the separator has cable passages that communicate with both the air cavity and the inner cavity.

[0020] In one embodiment, the fixing part has a mounting cavity that communicates with the communicating channel and the air cavity respectively, and at least a portion of the structure of the fan is located within the mounting cavity.

[0021] In one embodiment, the rotating shaft includes a fixing part and a main body part having the inner cavity. The fixing part is fixedly connected to the air duct and located outside the air duct. The main body part is rotatably connected to the handle. In another embodiment, the handle includes a housing having the pressure relief port and a first mounting member having an air passage. The housing and the first mounting member together form the receiving cavity. The handle is rotatably connected to the rotating shaft at least through the first mounting member. The mounting cavity and the inner cavity communicate through the air passage.

[0022] In one embodiment, the rotating shaft has a shaft hole through the rotating shaft, and the handle has a connecting shaft disposed on the first mounting member or the housing, the connecting shaft passing through the shaft hole so that the handle is rotatably connected to the rotating shaft.

[0023] In one embodiment, the handle further includes a second mounting member, the housing, together with at least the first mounting member and the second mounting member, forms the receiving cavity, the connecting shaft is located between the first mounting member and the second mounting member, and the first mounting member is connected to the second mounting member through the connecting shaft, and the rotating shaft is disposed between the first mounting member and the second mounting member.

[0024] In one embodiment, the pressure relief port is located at the end of the handle opposite to the rotating shaft.

[0025] In one embodiment, the electronic component includes at least a power module, which is electrically connected to the fan through the receiving cavity, the inner cavity, and the air cavity.

[0026] This application provides a hair dryer that creates an airflow path between the air chamber and the pressure relief port, passing through the inner cavity and the receiving cavity. Electronic components are housed within the receiving cavity of the handle, positioned along the airflow path. During operation, the fan drives airflow along this path between the air chamber, the inner cavity, the receiving cavity, and the pressure relief port, effectively dissipating heat generated by the electronic components. Therefore, the hair dryer of this application has good heat dissipation performance. Attached Figure Description

[0027] Figure 1 is a schematic diagram of a hair dryer according to an embodiment of this application, with the air tube omitted in the figure;

[0028] Figure 2 is a cross-sectional view of the hair dryer shown in Figure 1, with the handle and electronic components omitted.

[0029] Figure 3 is a cross-sectional view of the handle and electronic components shown in Figure 1;

[0030] Figure 4 is a structural schematic diagram of a rotating shaft and a fixing member provided in an embodiment of this application;

[0031] Figure 5 is a structural schematic diagram of the rotating shaft and guide component shown in Figure 4;

[0032] Figure 6 is a cross-sectional view of the shaft shown in Figure 4. Detailed Implementation

[0033] One embodiment of this application provides a hair dryer, as shown in Figures 1 to 3. The hair dryer includes a nozzle 10, a handle 20, a rotating shaft 30, a fan 40, and electronic components 50.

[0034] The air duct 10 has an air cavity 10a. The handle 20 has a receiving cavity 20a and a pressure relief port 20b communicating with the receiving cavity 20a. The rotating shaft 30 has an inner cavity 30a. The air duct 10 and the handle 20 are rotatably connected via the rotating shaft 30, and the inner cavity 30a communicates with both the air cavity 10a and the receiving cavity 20a, so that an airflow path is formed between the air cavity 10a and the pressure relief port 20b, passing through the inner cavity 30a and the receiving cavity 20a. The fan 40 is disposed within the air cavity 10a and located on the airflow path. The electronic component 50 is disposed within the receiving cavity 20a and located on the airflow path.

[0035] Referring to Figure 2, the air cavity 10a has an airflow inlet and an airflow outlet on opposite sides, respectively penetrating the air duct 10, forming a blowing passage between the airflow inlet and the airflow outlet. The fan 40 is disposed in the air cavity 10a to draw in airflow from the airflow inlet and blow the main airflow out from the airflow outlet.

[0036] The handle 20 is for the user to hold. The receiving cavity 20a is for placing electronic components 50, and the pressure relief port 20b is for air outlet.

[0037] The rotating shaft 30 is used to realize the relative rotation of the air duct 10 and the handle 20.

[0038] Specifically, the hair dryer 40 includes a usage state and a storage state. When using the hair dryer 40, force is applied to the nozzle 10 and / or handle 20, causing the nozzle 10 and handle 20 to rotate relative to each other in a direction away from each other, thus putting the hair dryer 40 into the usage state. When the hair dryer 40 is not in use, force can be applied to the nozzle 10 and / or handle 20, causing the nozzle and handle 20 to rotate relative to each other in a direction close to each other, thus putting the hair dryer 40 into the storage state, thereby reducing the space occupied by the hair dryer 40 and making the hair dryer 40 easy to store.

[0039] Understandably, the pivot 30 has a damping structure, which is used to keep the hair dryer 40 in a stored state or in use state, or any use angle between the stored state and the use state.

[0040] The airflow path refers to the path through which airflow flows between the air cavity 10a, the inner cavity 30a, the receiving cavity 20a, and the pressure relief port 20b.

[0041] The fan 40 is located in the airflow path and can drive the airflow to flow along the airflow path.

[0042] The airflow direction along the airflow path is not limited; it can flow from the air cavity 10a to the pressure relief port 20b, or from the pressure relief port 20b to the air cavity 10a.

[0043] For example, referring to Figure 2, the fan 40 has an air outlet 40a, which can be located upstream of the inner cavity 30a along the airflow path. That is, the airflow blown out from the air outlet 40a flows sequentially through the air cavity 10a, the inner cavity 30a, the receiving cavity 20a, and then is blown out from the pressure relief port 20b.

[0044] In another embodiment, the fan 40 has an air inlet, which can be located upstream of the inner cavity 30a along the airflow path. That is, since the air inlet of the fan 40 is a low-pressure area, the airflow will enter the receiving cavity 20a from the pressure relief port 20b under the action of the fan 40, and flow through the inner cavity 30a and the air cavity 10a in sequence, and enter the fan 40 from the air inlet.

[0045] The electronic component 50 is located on the airflow path, which means that the airflow will pass through the electronic component 50 during the airflow path, so as to carry away the heat generated by the electronic component 50 when it is working, thereby realizing the heat dissipation of the electronic component 50.

[0046] To ensure sufficient airflow through the electronic component 50, as shown in Figures 1 and 3, the pressure relief port 20b can be located at the end of the handle 20 away from the rotating shaft 30. That is, the pressure relief port 20b is located on the side of the receiving cavity 20a away from the inner cavity 30a, allowing airflow to pass through most of the area of ​​the receiving cavity 20a, thereby enhancing the heat dissipation efficiency of the electronic component 50.

[0047] The type of electronic component 50 is not limited. For example, electronic component 50 includes at least a power module, which is electrically connected to fan 40 through housing cavity 20a, inner cavity 30a and air cavity 10a.

[0048] The power module is used to connect to an external power source and convert the external power into electrical energy suitable for use by the internal circuitry.

[0049] The power module includes a circuit board, a filter, and an input interface disposed on the circuit board. The hair dryer 40 also includes a power cord electrically connected to the input interface. The handle 20 has a power cord clearance opening communicating with the receiving cavity 20a, and one end of the power cord passes through the clearance opening and is electrically connected to the input interface. The input interface is used to connect the power cord, the filter is used to reduce electromagnetic interference and radio frequency interference, and the circuit board is used to process the power input from the power cord.

[0050] The hair dryer of this embodiment forms an airflow path between the air cavity 10a and the pressure relief port 20b, passing through the inner cavity 30a and the receiving cavity 20a. The electronic component 50 is placed within the receiving cavity 20a of the handle 20 and positioned along the airflow path. During operation, the fan 40 drives the airflow along the airflow path between the air cavity 10a, the inner cavity 30a, the receiving cavity 20a, and the pressure relief port 20b, thereby removing the heat generated by the electronic component 50 during operation and achieving heat dissipation. Therefore, the hair dryer of this embodiment has good heat dissipation performance.

[0051] In one embodiment, referring to Figures 1 and 2, the rotating shaft 30 can be fixed to the air duct 10 and rotatably connected to the handle 20. That is, the air duct 10 and the rotating shaft 30 remain fixed, and the rotating shaft 30 drives the air duct 10 and the handle 20 to rotate relative to each other.

[0052] In another embodiment, the rotating shaft 30 can be fixed to the handle 20 and rotatably connected to the air duct 10.

[0053] The structure of the rotating shaft 30 is not limited. Exemplarily, the rotating shaft 30 may include a fixing part 31 and a main body part 32 having an inner cavity 30a. The fixing part 31 is fixedly connected to the air duct 10 and is located outside the air duct 10. The main body part 32 is rotatably connected to the handle 20. By fixing the fixing part 31 to the outside of the air duct 10, the rotating shaft 30 can be easily disassembled and assembled.

[0054] In another embodiment, please refer to Figures 2, 4 to 6. The rotating shaft 30 may include a fixing part 31 located inside the air cavity 10a and a main body part 32 located outside the air duct 10. The fixing part 31 is connected to the air duct 10, the main body part 32 is rotatably connected to the handle 20, and the inner cavity 30a is disposed in the main body part 32.

[0055] The fixing part 31 extends into the air cavity 10a and connects with the air duct 10, which can improve the connection strength and stability between the fixing part 31 and the air duct 10. More preferably, the shape of the fixing part 31 matches the inner wall of the air duct 10 to further improve the connection stability.

[0056] The connection method between the fixing part 31 and the air duct 10 is not limited. For example, the fixing part 31 and the air duct 10 can be connected non-detachably by means of bonding, or the fixing part 31 and the air duct 10 can be connected detachably, such as by snap-fit, or by fastening with screws, bolts or other fasteners.

[0057] Please refer to Figures 2, 4 and 6. The air duct 10 may have a first clearance opening. The rotating shaft 30 includes a connecting part 33 located between the fixed part 31 and the main body part 32 and having a connecting channel 33a. The connecting part 33 passes through the first clearance opening, and the inner cavity 30a is connected to the air cavity 10a through the connecting channel 33a.

[0058] The connection part 33 increases the distance between the air duct 10 and the main body 32, thereby preventing interference between the handle 20 and the air duct 10 during relative rotation, which would affect the user's use.

[0059] The connecting channel 33a is used to connect the inner cavity 30a and the air cavity 10a. Airflow can flow from the air cavity 10a to the inner cavity 30a through the connecting channel 33a, or from the inner cavity 30a to the air cavity 10a through the connecting channel 33a.

[0060] Referring to Figures 2 and 5, the blower 40 may also include a separator 60 disposed in the airflow path. The separator 60 is used to control the airflow volume in the airflow path.

[0061] The location of the separator 60 is not limited. For example, the separator 60 can be located in the connecting channel 33a. The separator 60 separates the first airflow channel in the connecting channel 33a. The first airflow channel is connected to the air cavity 10a and the inner cavity 30a respectively.

[0062] As shown in Figures 2 and 5, the partition 60 has a first airflow channel between it and the inner wall of the connecting channel 33a, through which airflow can flow. In another embodiment, the outer periphery of the partition 60 can be fitted to the inner wall of the connecting channel 33a, and the partition 60 forms an air passage connecting the ventilation cavity 10a and the inner cavity 30a, through which airflow flows between the ventilation cavity 10a and the inner cavity 30a.

[0063] In another embodiment, the partition 60 may be located within the inner cavity 30a, and the partition 60 divides the inner cavity 30a into a second airflow channel, which is connected to the connecting channel 33a and the receiving cavity 20a respectively.

[0064] For example, referring to FIG5, the separator 60 may be formed with a cable passage 60a that communicates with the air cavity 10a and the inner cavity 30a respectively.

[0065] The cable passage 60a is used for threading the cable. Understandably, the fan 40 located in the air cavity 10a needs to be electrically connected to the power supply component in the receiving cavity 20a of the handle 20. The cable connecting the two is fixed in the cable passage 60a of the separator 60 so that the separator 60 can press and position the cable to prevent the cable from shaking and tangling under the action of airflow, which would affect the user experience.

[0066] For example, referring to Figures 1 and 4, the fixing part 31 may have a mounting cavity 31a that communicates with the communication channel 33a and the air cavity 10a respectively, and at least a portion of the structure of the fan 40 is located within the mounting cavity 31a. That is, the fan 40 can be connected to the fixing part 31.

[0067] Please refer to Figure 4. To further secure the blower 40, the blower 40 may also include a fixing member 80 connected to the fixing part 31. The blower 40 is disposed between the fixing part 31 and the fixing member 80 so that the fixing part 31 and the fixing member 80 together secure the blower 40, thereby ensuring the stability of the blower 40 during operation.

[0068] The connection method between the fixing part 31 and the fixing member 80 is not limited. Please refer to Figure 4. The fixing part 31 and the fixing member 80 can be snapped together to facilitate the installation or removal of the fan 40.

[0069] In one embodiment, referring to FIG3, the handle 20 may include a housing 21 having a pressure relief port 20b and a first mounting member 22 having an air vent 22a. The housing 21 and the first mounting member 22 together form a receiving cavity 20a. The handle 20 is rotatably connected to the rotating shaft 30 at least through the first mounting member 22. The receiving cavity 20a and the inner cavity 30a are connected through the air vent 22a.

[0070] The first mounting component 22 is used for rotatable connection with the rotating shaft 30.

[0071] The air vent 22a is used to connect the receiving cavity 20a and the inner cavity 30a. In embodiments where the hair dryer also includes a separator 60 disposed on the airflow path, the separator 60 may also be disposed at the air vent 22a to control the airflow volume passing through the air vent 22a.

[0072] The connection method between the first mounting component 22 and the housing 21 is not limited. For example, the first mounting component 22 and the housing 21 can be fastened together by fasteners such as screws and bolts, or they can be snapped together.

[0073] The method of rotatably connecting the first mounting member 22 to the rotating shaft 30 is not limited. For example, referring to Figure 4, the rotating shaft 30 may have a shaft hole 30b passing through the rotating shaft 30. The handle 20 has a connecting shaft 24 disposed in the first mounting member 22 or the housing 21. The connecting shaft 24 passes through the shaft hole 30b so that the handle 20 is rotatably connected to the rotating shaft 30. That is, the handle 20 rotates relative to the rotating shaft 30 through the connecting shaft 24.

[0074] The connecting shaft 24 can be located on the first mounting part 22 or on the housing 21.

[0075] Please refer to Figure 3. Taking the connecting shaft 24 set on the first mounting part 22 as an example, the first mounting part 22 and the connecting shaft 24 can be integrally formed to ensure the connection strength between the first mounting part 22 and the connecting shaft 24, while reducing the assembly steps of the handle.

[0076] In another embodiment, the first mounting member 22 may have a shaft hole through the first mounting member 22, and the connecting shaft 24 is disposed on the rotating shaft 30.

[0077] Please refer to Figure 3. The handle 20 may also include a second mounting member 23. The second mounting member 23 and the first mounting member 22 are spaced apart. The housing 21, together with the first mounting member 22 and the second mounting member 23, forms a receiving cavity 20a. The connecting shaft 24 is located between the first mounting member 22 and the second mounting member 23, and the first mounting member 22 is connected to the second mounting member 23 through the connecting shaft 24. The rotating shaft 30 is located between the first mounting member 22 and the second mounting member 23.

[0078] The rotating shaft 30 is positioned between the first mounting member 22 and the second mounting member 23, meaning that the first mounting member 22 and the second mounting member 23 are located on opposite sides of the rotating shaft 30.

[0079] The first mounting member 22 is connected to the second mounting member 23 via a connecting shaft 24. That is, the connecting shaft 24 connects the first mounting member 22 and the second mounting member 23. For example, referring to Figure 3, the connecting shaft 24 can be integrally formed with the first mounting member 22. The second mounting member 23 has a mounting groove on the side near the first mounting member 22 that mates with the connecting shaft 24. A portion of the rotating shaft 30 extends between the first mounting member 22 and the second mounting member 23, allowing the connecting shaft 24 to pass through the shaft hole 30b. The end of the connecting shaft 24 facing away from the first mounting member 22 is connected to the second mounting member 23 by being inserted into the mounting groove. This structure can balance the force on the connecting shaft 24, thereby making the relative rotation between the rotating shaft 30 and the handle 20 more stable.

[0080] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0081] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A hair dryer, comprising: A ventilation duct with an air cavity; A handle having a receiving cavity and a pressure relief port communicating with the receiving cavity; A rotating shaft with an inner cavity is provided, and the air duct and the handle are rotatably connected through the rotating shaft. The inner cavity is connected to both the air cavity and the receiving cavity, so that an airflow path is formed between the air cavity and the pressure relief port, passing through the inner cavity and the receiving cavity. A fan, wherein the fan is disposed within the air cavity and located on the airflow path; Electronic components are disposed within the receiving cavity and located on the airflow path.

2. The hair dryer according to claim 1, wherein the hair dryer has an air outlet located upstream of the inner cavity along the airflow path.

3. The hair dryer according to claim 1 or 2, wherein the rotating shaft is fixed to the air tube and is rotatably connected to the handle.

4. The hair dryer according to claim 3, wherein the rotating shaft includes a fixing part located inside the air cavity and a main body part located outside the air tube, the fixing part is connected to the air tube, the main body part is rotatably connected to the handle, and the inner cavity is disposed in the main body part.

5. The hair dryer according to claim 4, wherein the air tube has a clearance opening, the rotating shaft includes a connecting part located between the fixing part and the main body part and having a communicating channel, the connecting part passing through the clearance opening, and the inner cavity communicating with the air cavity through the communicating channel.

6. The hair dryer according to claim 5, further comprising a separator disposed on the airflow path; The separator is located within the communicating channel, and the separator divides the communicating channel into a first airflow channel, which communicates with both the air cavity and the inner cavity; and / or, The separator is located inside the inner cavity, and the separator divides the inner cavity into a second airflow channel, which is connected to the connecting channel and the receiving cavity respectively.

7. The hair dryer according to claim 6, wherein the separator has wire passages communicating with the air cavity and the inner cavity respectively.

8. The hair dryer according to claim 5, wherein the fixing part has a mounting cavity communicating with the communicating channel and the air cavity respectively, and at least a portion of the structure of the blower is located within the mounting cavity.

9. The hair dryer according to claim 3, wherein the rotating shaft includes a fixing part and a main body part having the inner cavity, the fixing part is fixedly connected to the air tube and located outside the air tube, and the main body part is rotatably connected to the handle.

10. The hair dryer according to claim 3, wherein the handle comprises a housing having the pressure relief port and a first mounting member having an air passage, the housing and the first mounting member together forming the receiving cavity, the handle being rotatably connected to the rotating shaft at least through the first mounting member, and the mounting cavity and the inner cavity communicating through the air passage.

11. The hair dryer according to claim 10, wherein the rotating shaft has a shaft hole through the rotating shaft, and the handle has a connecting shaft disposed on the first mounting member or the housing, the connecting shaft passing through the shaft hole to allow the handle to be rotatably connected to the rotating shaft.

12. The hair dryer according to claim 11, wherein the handle further includes a second mounting member, the housing is formed together with at least the first mounting member and the second mounting member to form the receiving cavity, the connecting shaft is located between the first mounting member and the second mounting member, and the first mounting member is connected to the second mounting member through the connecting shaft, and the rotating shaft is disposed between the first mounting member and the second mounting member.

13. The hair dryer according to claim 1 or 2, wherein the pressure relief port is located at the end of the handle opposite to the rotating shaft.

14. The hair dryer according to claim 1 or 2, wherein the electronic components include at least a power module, and the power module is electrically connected to the fan through the receiving cavity, the inner cavity and the air cavity.

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