Air duct components and hair dryer

Abstract

This utility model relates to an air duct assembly and a hair dryer, comprising: a housing assembly having a mounting cavity, a first air duct cavity, and a second air duct cavity, the mounting cavity communicating with both the first and second air duct cavities; a first air inlet communicating with the mounting cavity; and a first air outlet and a second air outlet communicating with both the first and second air duct cavities; a fan assembly disposed on the housing assembly and located within the mounting cavity; a heating assembly disposed on the housing assembly and located within the first air duct cavity; and a circuit board assembly disposed on the housing assembly and located within the second air duct cavity. The structural design of this utility model effectively reduces the operating temperature of the circuit board assembly, ensuring continuous use of the hair dryer. By placing the circuit board assembly and the heating assembly within different air duct cavities, the impact of heat generated by the heating assembly during operation on the circuit board assembly can be reduced.

Description

Technical Field

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

[0002] The circuit board of a hair dryer will continuously generate heat during use. Since the circuit board is installed inside the hair dryer's casing, it may have difficulty dissipating heat. If the circuit board cannot dissipate heat, there is a risk of malfunction, which will affect the normal use of the hair dryer. Utility Model Content

[0003] Therefore, it is necessary to provide an air duct assembly and a hair dryer that can cool the circuit board, addressing the problem of heat dissipation difficulties in the circuit boards of existing hair dryer products during use.

[0004] A duct assembly includes: a housing assembly having a mounting cavity, a first duct cavity, and a second duct cavity, the mounting cavity communicating with both the first and second duct cavities; a first air inlet communicating with the mounting cavity; a first air outlet communicating with the first duct cavity; and a second air outlet communicating with the second duct cavity; a fan assembly disposed on the housing assembly and located within the mounting cavity; a heating assembly disposed on the housing assembly and located within the first duct cavity; and a circuit board assembly disposed on the housing assembly and located within the second duct cavity.

[0005] The air duct assembly disclosed in this application places a fan assembly in the mounting cavity, a heating assembly in the first air duct cavity, and a circuit board assembly in the second air duct cavity. Since the mounting cavity is connected to both the first and second air duct cavities, the fan assembly in the mounting cavity drives air into both cavities during operation. The air entering the second air duct cavity carries away the heat generated by the circuit board assembly and exits through the second air outlet into the external environment. This ensures that the circuit board assembly does not overheat, preventing malfunctions caused by heat and ensuring stable operation of the circuit board at a suitable temperature, thus improving its performance and extending its lifespan. Simultaneously, the air entering the second air duct cavity can replenish the output air, increasing the total output airflow. The air entering the first air duct cavity passes through the heating assembly and is blown out through the first air outlet. The heating assembly can be activated as needed to generate hot airflow within the first air duct cavity. Placing the circuit board assembly and heating assembly in different air duct cavities reduces the impact of heat generated by the heating assembly on the circuit board assembly.

[0006] In one embodiment, the housing assembly includes a fan mounting housing, a first housing assembly, and a second housing assembly. The first housing assembly is disposed on the fan mounting housing and communicates with the fan mounting housing. The second housing assembly is disposed on the fan mounting housing and / or the first housing assembly. The fan mounting housing has the mounting cavity. A first air duct cavity is formed between the inner wall of the first housing assembly and the outer wall of the second housing assembly. The second housing assembly has a second air duct cavity. The first housing assembly has a first air outlet and a second air outlet. The formation of the first air duct cavity between the inner wall of the first housing assembly and the outer wall of the second housing assembly, through the cooperation of two housing assemblies, results in a well-organized air duct cavity structure. This provides a relatively enclosed and suitable spatial environment for the heating and processing of air within this area, ensuring efficient operation of heating and other processes. The second housing assembly is mounted on the fan mounting housing and / or the first housing assembly. It cooperates with the first housing assembly to participate in the formation of the first air duct cavity, and also has its own second air duct cavity. This structural design enriches the internal air duct layout of the air duct assembly, allowing air to carry away the heat generated by the circuit board when it flows through the air duct cavity, thereby ensuring the normal operation of the circuit board assembly. It also further enhances the diversity and integration of the functions of the entire air duct assembly, enabling the heating component and the circuit board assembly to play their roles in an orderly manner in their respective corresponding air duct cavities, without interfering with each other and working together.

[0007] In one embodiment, the fan mounting housing includes a duct housing and a mounting component. The duct housing is disposed on the first housing assembly, and the mounting component is disposed on the duct housing and located at the first air inlet. The mounting component abuts against the fan assembly. The abutment between the mounting component and the fan assembly provides effective fixation and support for the fan assembly. During operation, the fan assembly generates vibrations and forces. The abutment of the mounting component effectively limits the displacement of the fan assembly, reduces noise caused by vibration, and ensures a more stable airflow direction and intensity. This results in smoother and more reliable airflow within the entire duct system, ensuring efficient ventilation and airflow functions in various usage scenarios, thus improving the overall user experience and performance of the equipment.

[0008] In one embodiment, the duct housing includes an outer duct shell and an inner duct shell. The outer duct shell is disposed on the first housing assembly, and the inner duct shell is disposed on the outer duct shell and located inside the outer duct shell. A first channel is formed between the outer duct shell and the inner duct shell. A second channel is provided inside the inner duct shell. The second housing assembly is disposed on the inner duct shell. The first channel communicates with the first duct cavity, and the second channel communicates with the second duct cavity. The double-shell structure of the outer and inner duct shells divides the space into independent first and second channels, providing relatively isolated spaces for airflow. This allows air entering the channels to flow along predetermined routes, avoiding unnecessary interference or mixing with air from other areas. This helps to precisely control the airflow direction, ensuring that air enters the first and second duct cavities for appropriate processing. This ensures the rational distribution and utilization of air within the duct assembly, thereby improving the overall efficiency of the duct assembly and guaranteeing a stable output of the required airflow, meeting the various functional requirements of the equipment.

[0009] In one embodiment, the first housing assembly is connected to the fan mounting housing. This connection effectively prevents loosening or displacement of components, ensuring the integrity of the overall duct assembly structure and providing structural flexibility for easier adjustments based on actual conditions. This connection method also facilitates subsequent maintenance and troubleshooting. When a problem occurs with the duct assembly, because it is connected relatively independently to the fan mounting housing, technicians can more easily focus their inspection and repair efforts on this connection and its subsequent related structures.

[0010] In one embodiment, the second housing assembly is connected to the fan mounting housing. The second housing assembly can be connected to the fan mounting housing as needed, allowing for adjustments based on actual requirements to meet different assembly needs and avoiding overly rigid structures that cannot meet specific installation environments.

[0011] In one embodiment, the fan assembly is mounted on the fan mounting housing, the heating assembly is mounted on the first housing assembly, and the circuit board assembly is mounted on the second housing assembly. By mounting the fan assembly on the fan mounting housing, maintenance and repair of the fan assembly become more convenient. Because its installation location is relatively clear and concentrated, personnel can quickly and accurately locate the fan assembly when the fan malfunctions or requires regular maintenance. Furthermore, the structural design of the fan mounting housing typically facilitates the disassembly and installation of related components, enabling efficient maintenance. The fan mounting housing is located at the starting point of the entire duct system where air enters. After the fan assembly is installed here, it can precisely guide the airflow into the subsequent duct cavity in a predetermined direction. The heating assembly is mounted on the first housing assembly. When the fan assembly drives air into the first duct cavity, the heating assembly can quickly heat the air, efficiently transferring heat to the air and reducing heat loss during the transfer process. The circuit board assembly is mounted on the second housing assembly. Driven by the fan assembly, air flows through the second air duct cavity. This allows the flowing air to carry away the heat generated by the circuit board assembly during operation, maintaining the circuit board assembly in a suitable temperature environment for stable operation. This avoids failures such as performance degradation of electronic components and short circuits due to overheating, effectively extending the service life of the circuit board assembly.

[0012] In one embodiment, the circuit board assembly includes a circuit board, a silicon controlled rectifier (SCR), and a circuit module. The circuit board is mounted on the housing assembly, the SCR is mounted on the circuit board, and the circuit module is mounted on the circuit board. By mounting the SCR on the circuit board, the duct assembly can achieve a more energy-efficient and high-performance operation. The SCR can control the current conduction in real time according to actual needs, avoiding energy waste that may occur in traditional fixed-power modes. When high-power heating is not required, the SCR can reduce the power of the heating element, reducing unnecessary energy consumption while maintaining a suitable outlet air temperature. This precise power control not only reduces the operating cost of the equipment but also improves the energy efficiency of the entire duct assembly, meeting the energy-saving and environmental protection requirements of modern equipment.

[0013] In one embodiment, the heating assembly includes a heating wire, a first heat insulation layer, a second heat insulation layer, and a support. The first heat insulation layer is disposed on the inner wall of the first housing assembly, the second heat insulation layer is disposed on the outer wall of the second housing assembly, the support is sandwiched between the first and second heat insulation layers, and the heating wire is disposed on the support and located between the first and second heat insulation layers; and / or the first air outlet and the second air outlet are located on the same side of the housing assembly, and the first air inlet is located on the side of the housing assembly away from the first and second air outlets. The heating wire, as the core component for generating heat, is securely mounted by the support, ensuring it remains in a suitable position and preventing problems such as poor contact or damage due to shaking or displacement during operation. The first heat insulation layer on the inner wall of the first housing assembly reduces the conduction of heat generated by the heating wire to the first housing assembly, preventing deformation or aging of the first housing assembly due to prolonged heating. On the other hand, it can concentrate heat as much as possible in the area where the air needs to be heated, so that heat can be transferred to the air flowing through the first air duct cavity more efficiently, reducing heat loss and improving heat utilization efficiency. This allows the air blown out from the first air outlet to reach the desired temperature more quickly and effectively. Providing a second heat insulation layer on the outer wall of the second housing assembly can reduce the transfer of heat emitted by the heating wire to the second air duct cavity, preventing overheating of the circuit board assembly due to heat transfer.

[0014] The second aspect of this application discloses a hair dryer, comprising: a housing assembly having an installation space and a second air inlet communicating with the installation space; an air duct assembly of any of the preceding claims, the air duct assembly being disposed on the housing assembly, wherein the first air inlet is communicating with the second air inlet or the first air inlet extends through the second air inlet to the outside of the installation space; and a handle assembly being disposed on the housing assembly.

[0015] The second aspect of this application discloses a hair dryer that provides a centralized and relatively enclosed space for all internal components through an installation space. This protects the internal components from external interference and effectively protects them from adverse factors such as physical impacts, dust intrusion, and moisture corrosion. This ensures that each component can operate normally in a relatively stable and safe environment, extending the service life of each component and the entire hair dryer. The outer casing has a second air inlet communicating with the installation space, ensuring effective air exchange between the inside and outside of the hair dryer and guaranteeing a continuous and stable airflow. A handle assembly is located on the outer casing, providing a convenient grip and operation area for the user, improving ease of use and comfort.

[0016] In one embodiment, the housing assembly has an assembly port communicating with the installation space, and the first air outlet and the second air outlet are connected to the assembly port or extend from the first air outlet and the second air outlet to the outside of the installation space via the assembly port.

[0017] In one embodiment, the housing assembly includes a housing body, an air outlet hood, and an air inlet hood. Both the air outlet hood and the air inlet hood are disposed on the housing body and located on opposite sides of the housing body. The air inlet hood has a second air inlet. By having the air inlet hood on one side to introduce outside air and the air outlet hood on the other side to exhaust treated air, a clear and smooth airflow path is formed inside the hair dryer, avoiding interference between the air inlet and outlet.

[0018] In one embodiment, the air hood is provided with the mounting port.

[0019] In one embodiment, the device further includes a fastener and a filter. The fastener is disposed on the housing assembly and located within the mounting space, between the second air inlet and the first air inlet. The filter is disposed on the fastener. The filter at the second air inlet effectively blocks dust, hair, debris, and other impurities from the outside air from entering the hair dryer. This prevents these impurities from entering the air duct assembly with the air and adhering to the blades of the fan assembly, affecting its rotational efficiency, or accumulating on the heating assembly, affecting the heating effect, or even potentially causing safety hazards.

[0020] In one embodiment, the handle assembly is rotatably connected to the housing assembly. This rotatable connection allows the hair dryer to be flexibly adjusted in angle and direction, improving ease of use and comfort, while also facilitating folding and storage, thus enhancing the product's portability.

[0021] In one embodiment, the handle assembly includes a handle housing, a rotating shaft, and a control circuit board. The handle housing has a receiving cavity, the control circuit board is disposed on the handle housing and located within the receiving cavity, the rotating shaft is disposed on the handle housing, and the outer housing assembly has a shaft hole that is adapted to the rotating shaft. Attached Figure Description

[0022] Figure 1 A 3D image of a hair dryer;

[0023] Figure 2 An exploded view of a hair dryer;

[0024] Figure 3 This is a cross-sectional view of an exploded view of a hair dryer.

[0025] Figure 4This is an exploded view of the air duct components;

[0026] Figure 5 This is a first cross-sectional view of the housing assembly;

[0027] Figure 6 This is an exploded view of the housing assembly;

[0028] Figure 7 This is a second cross-sectional view of the housing assembly;

[0029] Figure 8 A 3D view of the fan housing;

[0030] Figure 9 A 3D view of the circuit board assembly;

[0031] Figure 10 This is a 3D view of the heating assembly;

[0032] Figure 11 This is a cross-sectional view of the housing assembly;

[0033] Figure 12 This is an exploded view of the housing assembly;

[0034] Figure 13 An exploded view of the handle assembly;

[0035] Figure 14 This is a cross-sectional view of the handle assembly.

[0036] The correspondence between the reference numerals and the component names is as follows:

[0037] 100 Housing assembly, 110 Housing body, 120 Exhaust hood, 130 Inlet hood, 1004 Shaft hole, 1001 Mounting space, 1002 Second air inlet, 1003 Third air outlet;

[0038] 200 air duct assembly;

[0039] 1. Housing assembly; 11. Fan mounting housing; 12. First housing assembly; 13. Second housing assembly; 111. Duct housing; 112. Mounting component; 1111. Duct outer shell; 1112. Inner duct shell; 11101. First channel; 11102. Second channel; 101. Mounting cavity; 102. First duct cavity; 103. Second duct cavity; 104. First air inlet; 105. First air outlet; 106. Second air outlet.

[0040] 2. Fan components;

[0041] 3 heating components, 31 heating wire, 32 first heat insulation layer, 33 second heat insulation layer, 34 bracket;

[0042] 4. Circuit board assembly; 41. Circuit board; 42. Thyristor;

[0043] 300 Handle assembly; 310 Handle housing; 320 Rotary shaft; 330 Control circuit board; 3001 Receiving cavity;

[0044] 400 fasteners;

[0045] 500 filter. Detailed Implementation

[0046] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention 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.

[0047] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0048] The following description, with reference to the accompanying drawings, describes some embodiments of the air duct assembly and hair dryer of the present invention.

[0049] like Figures 1 to 4 As shown, this embodiment discloses an air duct assembly, including a housing assembly 1. The housing assembly 1 has a mounting cavity 101, a first air duct cavity 102, and a second air duct cavity 103. The mounting cavity 101 communicates with the first air duct cavity 102 and the second air duct cavity 103 respectively. The housing assembly 1 has a first air inlet 104 communicating with the mounting cavity 101, a first air outlet 105 communicating with the first air duct cavity 102, and a second air outlet 106 communicating with the second air duct cavity 103; a fan assembly 2, which is mounted on the housing assembly 1 and located in the mounting cavity 101; a heating assembly 3, which is mounted on the housing assembly 1 and located in the first air duct cavity 102; and a circuit board assembly 4, which is mounted on the housing assembly 1 and located in the second air duct cavity 103. The circuit board assembly 4 includes a circuit board 41, a thyristor 42, and a circuit module 43. The circuit board 41 is mounted on the housing assembly 1, the thyristor 42 is mounted on the circuit board 41, and the circuit module 43 is mounted on the circuit board 41.

[0050] The air duct assembly disclosed in this application has a fan assembly 2 disposed at the mounting cavity 101, a heating assembly 3 disposed in the first air duct cavity 102, and a circuit board assembly 4 disposed in the second air duct cavity 103. Since the mounting cavity 101 is connected to both the first and second air duct cavities 102 and 103, when the fan assembly 2 in the mounting cavity 101 operates, it drives air into both the first and second air duct cavities 102 and 103 respectively. The air entering the second air duct cavity 103 carries away the heat generated by the circuit board assembly 4 and exits into the external environment through the second air outlet 106, ensuring that the circuit board assembly 4 does not overheat and preventing the hair dryer from malfunctioning due to overheating. The air entering the first air duct cavity 102 passes through the heating assembly 3 and is then blown out through the first air outlet 105. The heating assembly 3 can be activated as needed to generate hot airflow within the first air duct cavity 102. The circuit board assembly 4 and the heating assembly 3 are disposed in different air duct cavities, which reduces the impact of the heat generated by the heating assembly 3 on the circuit board assembly 4. By mounting a silicon controlled rectifier (SCR) 42 on the circuit board 41, the air duct assembly can achieve a more energy-efficient and high-performance operation. The SCR 42 can control the current conduction in real time according to actual needs, avoiding energy waste that may occur in traditional fixed-power modes. When high-power heating is not required, the SCR 42 can reduce the power of the heating element 3, reducing unnecessary energy consumption while maintaining a suitable outlet air temperature. This precise power control not only reduces the operating cost of the equipment but also improves the energy efficiency of the entire air duct assembly, meeting the energy-saving and environmental protection requirements of modern equipment.

[0051] As shown in Figures 3 to 6, in addition to the features of the above embodiments, this embodiment further defines: the housing assembly 1 includes a fan mounting housing 11, a first housing assembly 12, and a second housing assembly 13. The first housing assembly 12 is disposed on the fan mounting housing 11 and communicates with the fan mounting housing 11. The second housing assembly 13 is disposed on the fan mounting housing 11 and / or the first housing assembly 12. The fan mounting housing 11 has a mounting cavity 101. A first air duct cavity 102 is formed between the inner wall of the first housing assembly 12 and the outer wall of the second housing assembly 13. The second housing assembly 13 has a second air duct cavity 103. The first housing assembly 12 has a first air outlet 105 and a second air outlet 106. The first air duct cavity 102 is formed between the inner wall of the first housing assembly 12 and the outer wall of the second housing assembly 13. This method of forming an air duct cavity through the cooperation of two housing assemblies makes the air duct cavity structure regular, providing a relatively closed and suitable spatial environment for the heating and treatment process of air in this area, ensuring that heating and other operations can be carried out efficiently. The second housing assembly 13 is disposed on the fan mounting housing 11 and / or the first housing assembly 12. It cooperates with the first housing assembly 12 to participate in the formation of the first air duct cavity 102, and has its own second air duct cavity 103. This structural design enriches the internal air duct layout of the air duct assembly, allowing air to carry away the heat generated by the circuit board assembly 4 when it flows through the air duct cavity, thereby ensuring the normal operation of the circuit board assembly 4. It also further enhances the diversity and integration of the functions of the entire air duct assembly, so that the heating assembly 3 and the circuit board assembly 4 can play their roles in an orderly manner in their respective corresponding air duct cavities, without interfering with each other and cooperating with each other.

[0052] like Figure 4 and Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the fan mounting housing 11 includes a duct housing 111 and a mounting member 112. The duct housing 111 is disposed on the first housing assembly 12, and the mounting member 112 is disposed on the duct housing 111 and located at the first air inlet 104. The mounting member 112 abuts against the fan assembly 2. By abutting against the fan assembly 2, the fan assembly 2 can be well fixed and supported. When the fan assembly 2 is working, its operation will generate a certain amount of vibration and force. The abutment of the mounting member 112 can effectively limit the displacement of the fan assembly 2, reduce the noise generated by vibration, and ensure that the airflow direction and intensity output by the fan assembly 2 are more stable. This makes the airflow in the entire duct system more stable and reliable, thereby ensuring that the entire duct assembly can efficiently achieve ventilation and air outlet functions in various usage scenarios, improving the user experience and performance of the entire equipment.

[0053] like Figure 6 and Figure 7As shown, in addition to the features of the above embodiments, this embodiment further defines that: the air duct housing 111 includes an outer air duct housing 1111 and an inner air duct housing 1112. The outer air duct housing 1111 is disposed on the first housing assembly 12, and the inner air duct housing 1112 is disposed on the outer air duct housing 1111 and located inside the outer air duct housing 1111. A first channel 11101 is formed between the outer air duct housing 1111 and the inner air duct housing 1112. A second channel 11102 is provided inside the inner air duct housing 1112. The second housing assembly 13 is disposed on the inner air duct housing 1112. The first channel 11101 communicates with the first air duct cavity 102, and the second channel 11102 communicates with the second air duct cavity 103. The double-shell structure of the outer shell 1111 and the inner shell 1112 divides the space into independent first channel 11101 and second channel 11102, providing relatively isolated space for airflow. This allows the air entering the channel to flow along a predetermined route, avoiding unnecessary interference or mixing with air from other areas. This helps to precisely control the airflow direction, ensuring that the air enters the first duct cavity 102 and the second duct cavity 103 for appropriate processing. This ensures the rational distribution and utilization of air within the duct assembly, thereby improving the overall working efficiency of the duct assembly and guaranteeing that it can stably output the required airflow, meeting the various needs of the equipment for duct functions.

[0054] like Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the first housing assembly 12 is connected to the fan mounting housing 11. Connecting the first housing assembly 12 to the fan mounting housing 11 effectively prevents loosening or displacement of components, ensuring the integrity of the overall structure of the duct assembly. It also provides the duct assembly with a certain degree of structural flexibility, allowing for easier adjustment of the duct structure according to actual conditions. This connection method facilitates subsequent maintenance and troubleshooting to a certain extent. When a problem occurs with the housing assembly 1, because it is connected relatively independently to the fan mounting housing 11, technicians can more easily focus on this connection and its subsequent related structures for inspection and repair.

[0055] like Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the second housing assembly 13 is connected to the fan mounting housing 11. The second housing assembly 13 can be connected to the fan mounting housing 11 as needed, so that it can be adjusted according to actual needs for different assembly requirements, avoiding the inability to meet specific installation environments due to an overly rigid structure.

[0056] like Figure 3 and Figure 6As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the fan assembly 2 is disposed on the fan mounting housing 11, the heating assembly 3 is disposed on the first housing assembly 12, and the circuit board assembly 4 is disposed on the second housing assembly 13. By disposing of the fan assembly 2 on the fan mounting housing 11, maintenance and repair of the fan assembly 2 become more convenient. Because its installation location is relatively clear and concentrated, when the fan assembly 2 malfunctions or requires regular maintenance, personnel can quickly and accurately locate its position. Furthermore, the structural design of the fan mounting housing 11 is generally convenient for disassembling and installing related components, thus enabling efficient maintenance work. The fan mounting housing 11 is located at the starting point of air entry in the entire duct system. After the fan assembly 2 is installed here, it can accurately guide the airflow into the subsequent duct cavity in a predetermined direction. The heating assembly 3 is disposed on the first housing assembly 12. When the fan assembly 2 drives air into the first duct cavity 102, the heating assembly 3 can quickly heat the air, efficiently transferring heat to the air and reducing heat loss during the transfer process. The circuit board assembly 4 is mounted on the second housing assembly 13. Driven by the fan assembly 2, air flows through the second air duct cavity 103. This allows the flowing air to carry away the heat generated by the circuit board assembly 4 during operation, keeping the circuit board assembly 4 in a suitable temperature environment for stable operation. This avoids failures such as performance degradation of electronic components and short circuits due to overheating, effectively extending the service life of the circuit board assembly 4.

[0057] In addition to the features of the above embodiments, this embodiment further specifies that: the number of silicon controlled rectifiers 42 is multiple, and the multiple silicon controlled rectifiers are disposed on the circuit board 41.

[0058] like Figure 6 and Figure 9As shown, in addition to the features of the above embodiments, this embodiment further defines: the heating component 3 includes a heating wire 31, a first heat insulation layer 32, a second heat insulation layer 33, and a support 34. The first heat insulation layer 32 is disposed on the inner wall of the first housing component 12, the second heat insulation layer 33 is disposed on the outer wall of the second housing component 13, the support 34 is sandwiched between the first heat insulation layer 32 and the second heat insulation layer 33, the heating wire 31 is disposed on the support 34 and located between the first heat insulation layer 32 and the second heat insulation layer 33; and / or the first air outlet 105 and the second air outlet 106 are located on the same side of the housing component 1, and the first air inlet 104 is located on the side of the housing component 1 away from the first air outlet 105 and the second air outlet 106. The heating wire 31, as the core component for generating heat, is stably set by the support 34, so that the heating wire 31 can be kept in a suitable position, avoiding problems such as poor contact or damage due to shaking or displacement during operation. A first heat insulation layer 32 is provided on the inner wall of the first housing assembly 12 to reduce the conduction of heat generated by the heating wire 31 to the first housing assembly 12, preventing deformation and aging of the first housing assembly 12 due to prolonged heating. On the other hand, it can concentrate heat as much as possible in the area where the air needs to be heated, so that heat can be transferred to the air flowing through the first air duct cavity 102 more efficiently, reducing heat loss and improving heat utilization efficiency, thereby enabling the air blown out from the first air outlet 105 to reach the desired temperature more quickly and effectively. A second heat insulation layer 33 is provided on the outer wall of the second housing assembly 13 to reduce the transfer of heat emitted by the heating wire 31 to the second air duct cavity 103, preventing overheating of the circuit board assembly 4 due to heat transfer.

[0059] like Figures 1 to 10 As shown, this embodiment discloses a hair dryer, including a housing assembly 100, which has an installation space 1001 and a second air inlet 1002 communicating with the installation space 1001; an air duct assembly 200 of any of the preceding items, which is disposed on the housing assembly 100, wherein a first air inlet 104 communicates with the second air inlet 1002 or the first air inlet 104 extends to the outside of the installation space 1001 through the second air inlet 1002; and a handle assembly 300, which is disposed on the housing assembly 100.

[0060] The second aspect of this application discloses a hair dryer. An installation space 1001 provides a centralized and relatively enclosed space for all internal components, protecting them from external interference. This effectively protects the internal components from adverse factors such as physical impacts, dust intrusion, and moisture corrosion, ensuring that each component can operate normally in a relatively stable and safe environment, thus extending the service life of each component and the entire hair dryer. The outer casing 100 has a second air inlet 1002 communicating with the installation space 1001, ensuring effective air exchange between the inside and outside of the hair dryer and guaranteeing a continuous and stable airflow. The handle assembly 300 is located on the outer casing 100, providing a convenient grip and operation area for the user, improving ease of use and comfort.

[0061] like Figures 10 to 11 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the housing assembly 100 has an assembly port 1003 communicating with the installation space 1001, and the first air outlet 105 and the second air outlet 106 are communicating with the assembly port 1003 or the first air outlet 105 and the second air outlet 106 extend outside the installation space 1001 through the assembly port 1003.

[0062] like Figures 10 to 11 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the housing assembly 100 includes a housing body 110, an air outlet hood 120, and an air inlet hood 130. Both the air outlet hood 120 and the air inlet hood 130 are disposed on the housing body 110 and located on both sides of the housing body 110. The air outlet hood 120 is provided with a second air outlet 1002. By having the air inlet hood 120 on one side responsible for introducing outside air, and the air outlet hood 130 on the other side for discharging treated air, a clear and smooth airflow path is formed inside the hair dryer, avoiding mutual interference between the air inlet and outlet.

[0063] like Figures 10 to 11 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the air outlet shroud 120 is provided with an assembly port 1003.

[0064] like Figures 10 to 11As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the outer casing assembly 100 also includes a fastener 400 and a filter 500. The fastener 400 is disposed on the outer casing assembly 100 and located within the installation space 1001. The fastener 400 is located between the second air inlet 1002 and the first air inlet 104. The filter 500 is disposed on the fastener 400. The filter 500 is disposed at the second air inlet 1002. The filter 500 can effectively block dust, hair, debris and other impurities in the outside air from entering the hair dryer. This prevents these impurities from entering the air duct assembly 200 with the air and adhering to the blades of the fan assembly 2, affecting its rotation efficiency, or accumulating on the heating assembly 3, affecting the heating effect, or even causing safety hazards.

[0065] like Figures 1 to 12 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the handle assembly 300 is rotatably connected to the housing assembly 100. This rotatable connection allows the hair dryer to be flexibly adjusted in angle and direction, improving ease of use and comfort, while also facilitating folding and storage, thus enhancing the product's portability.

[0066] like Figure 11 and Figure 12 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the handle assembly 300 includes a handle housing 310, a rotating shaft 320 and a control circuit board 330. The handle housing 310 is provided with a receiving cavity 3001. The control circuit board 330 is disposed on the handle housing 310 and located in the receiving cavity 3001. The rotating shaft 320 is disposed on the handle housing 310. The outer shell assembly 100 is provided with a shaft hole 1004, which is adapted to the rotating shaft 320.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An air duct assembly, characterized by, The aforementioned air duct assembly includes: The housing assembly (1) is provided with a mounting cavity (101), a first air duct cavity (102) and a second air duct cavity (103). The mounting cavity (101) is connected to the first air duct cavity (102) and the second air duct cavity (103) respectively. The housing assembly (1) has a first air inlet (104) connected to the mounting cavity (101), a first air outlet (105) connected to the first air duct cavity (102), and a second air outlet (106) connected to the second air duct cavity (103). A fan assembly (2) is disposed on the housing assembly (1) and located in the mounting cavity (101); Heating component (3), the heating component (3) is disposed on the housing assembly (1) and located in the first air duct cavity (102); Circuit board assembly (4), the circuit board assembly (4) is disposed on the housing assembly (1) and located in the second air duct cavity (103); The circuit board assembly (4) includes a circuit board (41), a thyristor (42), and a circuit module (43). The circuit board (41) is disposed on the housing assembly (1), the thyristor (42) is disposed on the circuit board (41), and the circuit module (43) is disposed on the circuit board (41).

2. The air duct assembly of claim 1, wherein, The housing assembly (1) includes a fan mounting housing (11), a first housing assembly (12), and a second housing assembly (13). The first housing assembly (12) is disposed on the fan mounting housing (11) and communicates with the fan mounting housing (11). The second housing assembly (13) is disposed on the fan mounting housing (11) and / or the first housing assembly (12). The fan mounting housing (11) is provided with the mounting cavity (101). The inner wall of the first housing assembly (12) and the outer wall of the second housing assembly (13) form the first air duct cavity (102). The second housing assembly (13) is provided with the second air duct cavity (103). The first housing assembly (12) is provided with the first air outlet (105) and the second air outlet (106).

3. The air duct assembly of claim 2, wherein, The fan mounting housing (11) includes a duct housing (111) and a mounting component (112). The duct housing (111) is disposed on the first housing assembly (12), and the mounting component (112) is disposed on the duct housing (111) and located at the first air inlet (104). The mounting component (112) abuts against the fan assembly (2).

4. The air duct assembly of claim 3, wherein, The air duct housing (111) includes an outer air duct shell (1111) and an inner air duct shell (1112). The outer air duct shell (1111) is disposed on the first housing assembly (12). The inner air duct shell (1112) is disposed on the outer air duct shell (1111) and located inside the outer air duct shell (1111). A first channel (11101) is formed between the outer air duct shell (1111) and the inner air duct shell (1112). A second channel (11102) is provided inside the inner air duct shell (1112). The second housing assembly (13) is disposed on the inner air duct shell (1112). The first channel (11101) communicates with the first air duct cavity (102), and the second channel (11102) communicates with the second air duct cavity (103).

5. The air duct assembly of claim 2, wherein, The first housing assembly (12) is connected to the fan mounting housing (11); And / or the second housing assembly (13) is connected to the fan mounting housing (11).

6. The air duct assembly of claim 2, wherein, The fan assembly (2) is mounted on the fan mounting housing (11), the heating assembly (3) is mounted on the first housing assembly (12), and the circuit board assembly (4) is mounted on the second housing assembly (13).

7. The air duct assembly of claim 2, wherein, The heating assembly (3) includes a heating wire (31), a first heat insulation layer (32), a second heat insulation layer (33), and a bracket (34). The first heat insulation layer (32) is disposed on the inner wall of the first housing assembly (12), the second heat insulation layer (33) is disposed on the outer wall of the second housing assembly (13), the bracket (34) is sandwiched between the first heat insulation layer (32) and the second heat insulation layer (33), and the heating wire (31) is disposed on the bracket (34) and located between the first heat insulation layer (32) and the second heat insulation layer (33).

8. The air duct assembly of claim 2, wherein, The first air outlet (105) and the second air outlet (106) are located on the same side of the housing assembly (1), and the first air inlet (104) is located on the side of the housing assembly (1) away from the first air outlet (105) and the second air outlet (106).

9. An electric hair dryer, characterized by The hair dryer includes: The housing assembly (100) has an installation space (1001) and a second air inlet (1002) communicating with the installation space (1001). The air duct assembly (200) according to any one of claims 1 to 8, wherein the air duct assembly (200) is disposed on the housing assembly (100), and the first air inlet (104) communicates with the second air inlet (1002) or the first air inlet (104) extends through the second air inlet (1002) to the outside of the installation space (1001); A handle assembly (300) is disposed on the housing assembly (100).

10. The hair dryer according to claim 9, characterized in that, The outer casing assembly (100) includes an outer casing body (110), an air outlet hood (120), and an air inlet hood (130). The air outlet hood (120) and the air inlet hood (130) are both disposed on the outer casing body (110) and located on both sides of the outer casing body (110). The air inlet hood (130) is provided with a second air inlet (1002). And / or may also include a snap fastener (400) and a filter (500), the snap fastener (400) being disposed on the housing assembly (100) and located within the mounting space (1001), the snap fastener (400) being located between the second air inlet (1002) and the first air inlet (104), and the filter (500) being disposed on the snap fastener (400); And / or the handle assembly (300) is rotatably connected to the housing assembly (100); And / or the handle assembly (300) includes a handle housing (310), a rotating shaft (320), and a control circuit board (330). The handle housing (310) has a receiving cavity (3001). The control circuit board (330) is disposed on the handle housing (310) and located within the receiving cavity (3001). The rotating shaft (320) is disposed on the handle housing (310). The outer shell assembly (100) has a shaft hole (1004) that is adapted to the rotating shaft (320).

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