Hair drying appliance

Abstract

The present application relates to a kind of dry hair appliances, it relates to the technical field of personal care tools.The dry hair appliance includes: the whole body of construction with air supply passage;Line board frame is installed in the whole body, and the whole body is separated into heating cavity and circuit cavity, heating cavity is located on the side of air supply passage close to air outlet, and circuit cavity is isolated from air supply passage;Line control component is installed in the line board frame, and located in circuit cavity;Heating component is installed in heating cavity, and the side wall of line board frame forming air supply passage is sequentially provided with first wall and second wall along the direction of airflow, and the distance between second wall and heating component is less than the distance between first wall and heating component.The dry hair appliance provided by the present application isolates circuit cavity from air supply passage by line board frame, reduces the mutual interference between hot airflow in air supply passage and line control component in circuit cavity, and by the setting of first wall and second wall, airflow flows to air outlet as much as possible, thereby improving dry hair effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of personal care tools, in particular to a hair drying appliance. BACKGROUND

[0002] A hair dryer is a kind of personal care appliance which can dry hair quickly. The hair dryer can heat the air in the air duct by heating wire, and blow the hot air to the wet hair, so as to achieve the effect of drying hair quickly. Generally, the hair dryer comprises a handle, an electric control assembly arranged in the handle, and a switch assembly electrically connected with the electric control assembly. However, when most of the hair dryers are used, the hot air in the air duct will have a certain heat effect on the circuit board, and the arrangement of the circuit board will also cause the disorder of the hot air flow path in the air duct, thereby affecting the heating and drying effect. SUMMARY

[0003] Therefore, the present application provides a hair drying appliance which can improve the effective heat of the hair dryer, thereby improving the drying effect.

[0004] A hair drying appliance comprises: a whole machine body which is configured with an air supply channel, the air supply channel has an air inlet and an air outlet; a circuit board frame which is installed in the whole machine body and separates the whole machine body into a heating cavity and a circuit cavity, the heating cavity is located on one side of the air supply channel close to the air outlet, and the circuit cavity is isolated from the air supply channel; the side wall of the air supply channel formed by the circuit board frame is provided with a first wall and a second wall in sequence along the airflow direction; a line control assembly which is installed in the circuit board frame and located in the circuit cavity; a heating assembly which is installed in the heating cavity, and the distance between the second wall and the heating assembly is less than the distance between the first wall and the heating assembly.

[0005] The dry hair appliance separates the whole machine body into a heating cavity and a circuit cavity by arranging a circuit board frame in the whole machine body. The heating cavity is used for mounting a heating assembly, and the heating cavity is connected with an air supply channel so that the airflow sent through the air supply channel is heated by the heating assembly and then sent out. The wire control assembly is arranged in the circuit cavity and mounted on the circuit board frame. The side wall of the air supply channel formed by the circuit board frame is sequentially provided with a first wall and a second wall along the airflow direction, and the distance between the second wall and the heating assembly is less than the distance between the first wall and the heating assembly. That is, the wire control assembly is isolated from the air duct by arranging the circuit board frame, so that the hot airflow in the heating cavity does not affect the wire control assembly in the circuit cavity, and the wire control assembly does not affect the hot airflow in the heating cavity. At the same time, by arranging the distances between the first wall and the second wall of the circuit board frame and the heating assembly, the airflow sent into the air supply channel can change the flow direction along with the difference between the first wall and the second wall, so as to meet the requirement of blowing out from the air outlet as high as possible, and the airflow is changed in direction to prevent the air flow from flowing towards the side of the circuit cavity, thereby improving the dry hair effect and further reducing the influence of the electric control assembly and the hot airflow in the air supply channel.

[0006] In one of the embodiments, the circuit board frame is configured with a mounting hole penetrating through the thickness direction of the circuit board frame; the wire control assembly includes a circuit board and a heat dissipation member mounted on the side of the circuit board facing the heating cavity, and the heat dissipation member protrudes from the circuit board and is embedded in the mounting hole.

[0007] In one of the embodiments, the side of the heat dissipation member facing the heating cavity is flush with the side of the mounting hole facing the heating cavity.

[0008] In one of the embodiments, the circuit board includes a first layer and a second layer stacked along the axial direction of the whole machine body, and electrical elements are arranged on the first layer and the second layer, and the first layer and the second layer have a height difference along the axial direction of the whole machine body, and the heat dissipation member is arranged on one of the first layer and the second layer close to the circuit board frame.

[0009] In one of the embodiments, the second layer is located close to the circuit board frame, and the radial dimension of the second layer is less than the radial dimension of the first layer; and the heat dissipation member is mounted on the second layer.

[0010] In one of the embodiments, the surface of the first wall and / or the second wall is curved; preferably, the connection between the first wall and the second wall is transitioned by a curved surface.

[0011] In one of the embodiments, the maximum distance difference between the second wall and the first wall relative to the air outlet is between 0.6cm and 1.3cm.

[0012] In one of the embodiments, the projection area of the second wall relative to the air outlet side plane accounts for 45%-49% of the projection area of the circuit board frame relative to the air outlet side plane.

[0013] In one of the embodiments, the connection between the first wall and the second wall causes a change of the flow direction of at least part of the air flow by 60-90 degrees; preferably, the second wall causes a change of the flow direction of at least part of the air flow by 45-90 degrees.

[0014] In one of the embodiments, the circuit board frame is configured with a recessed space at the position of the second wall and towards the side of the circuit cavity, and the recessed space is used for accommodating part of the line control assembly.

[0015] In one of the embodiments, the circuit board frame is configured with a wire hole at the position corresponding to the first wall, and a first sealing member is arranged at the wire hole, and the wire of the heating assembly is connected to the line control assembly through the first sealing member.

[0016] In one of the embodiments, the hair dryer further comprises a whole machine shell covering the outside of the whole machine body, and the whole machine shell and the whole machine body have a heat insulation cavity surrounding the peripheral side of the whole machine body, and the heat insulation cavity at least partially overlaps with the heating cavity along the axial direction of the whole machine body.

[0017] In one of the embodiments, the radial width of the heat insulation cavity is between 0.5mm and 2mm.

[0018] In one of the embodiments, the whole machine body further comprises a cylinder extending along the axis of the air supply channel, and the side of the cylinder away from the air outlet is sealingly connected with the circuit board frame, and the cylinder and the circuit board frame jointly enclose the air supply channel; the air outlet is arranged on the side of the cylinder away from the circuit board frame, and the air inlet is arranged on the peripheral side of the circuit board frame close to the first wall; and the heat insulation cavity is arranged between the cylinder and the whole machine shell.

[0019] In one of the embodiments, the cylinder comprises an inner cylinder and an outer cylinder sleeved outside the inner cylinder, the heating assembly is arranged between the inner cylinder and the outer cylinder, and the end of the outer cylinder away from the air outlet is sealingly connected to the circuit board frame through a second sealing member; the heat insulation cavity is arranged between the outer cylinder and the whole machine shell, and at least the inner wall of the outer cylinder towards the heating assembly is provided with a heat insulation sheet.

[0020] In one of the embodiments, the hair drying appliance further comprises a handle connected to the main body and a switch assembly mounted on the handle, the handle is configured with an air inlet channel communicated with the air inlet of the air supply channel and a mounting cavity isolated from the air inlet channel, the switch assembly is at least partially assembled in the mounting cavity, and the switch assembly is electrically connected with the wire control assembly; the handle is sealingly connected with the main body.

[0021] In one of the embodiments, the handle comprises an air duct shell and a handle shell covering the outside of the air duct shell, and the mounting cavity is configured between the handle shell and the air duct shell.

[0022] In one of the embodiments, a third sealing member is arranged at the air inlet, and the third sealing member is used to sealingly connect the air duct shell with the wire board frame.

[0023] In one of the embodiments, at least one of the mounting cavity and the heat insulation cavity is communicated with the circuit cavity.

[0024] In one of the embodiments, the main body further comprises a touch assembly mounted on the side of the wire control assembly away from the air outlet, the circuit cavity is arranged between the wire board frame and the touch assembly, and the touch assembly is electrically connected with the wire control assembly.

[0025] In one of the embodiments, the touch assembly is configured with a touch shell, the touch shell is buckled on the end of the main shell away from the air outlet, and the touch shell is sealingly connected with the main shell. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The schematic diagram of the hair drying appliance provided in the embodiment of the present application;

[0027] Figure 2 The hair drying appliance provided in the embodiment of the present application; Figure 1 The sectional view of the hair drying appliance provided in the embodiment of the present application;

[0028] Figure 3 The hair drying appliance provided in the embodiment of the present application; Figure 2 The partial sectional view of the hair drying appliance provided in the embodiment of the present application;

[0029] Figure 4 The schematic diagram of the wire board frame in the hair drying appliance provided in the embodiment of the present application; Figure 3

[0030] The sectional view of the wire board frame provided in the embodiment of the present application; Figure 5 Figure 4 The partial exploded view of the hair drying appliance provided in the embodiment of the present application;

[0031] Figure 6 Figure 1 The partial exploded view of the hair drying appliance provided in the embodiment of the present application; ​​

[0032] Figure 7 for Figure 1 A partial schematic diagram of the provided hair drying equipment;

[0033] Figure 8 for Figure 7 A partial schematic diagram of the provided hair drying equipment;

[0034] Figure 9 for Figure 3 A magnified view of a section at point B.

[0035] Reference numerals: 1-Head; 2-Tail; 10-Heating component; 20-Cylinder; 21-Inner cylinder; 22-Outer cylinder; 23-Heat insulation sheet; 31-Circuit board frame; 32-Wired control component; 40-Handle; 41-Air inlet channel; 42-Switch component; 43-Motor; 44-Air inlet; 91-First seal; 92-Second seal; 93-Third seal; 201-Air outlet; 221-Slot; 222-Clamping arm; 311-Insertion strip; 312-Clamping protrusion; 313-Wire hole; 315-Air inlet; 316-Mounting hole; 321-First layer plate ; 322-Second layer board; 323-Electrical components; 324-Heat sink; 325-Circuit board; 1000-Main body; 1001-Air supply channel; 2000-Main shell; 2001-Touch component; 2003-Handle shell; 2004-Extension shell section; 2005-Touch shell; 2006-Air duct shell; 2221-Snap-in hole; 3001-Circuit cavity; 3002-Heating cavity; 3003-Insulation cavity; 3004-Mounting cavity; 3101-First wall; 3102-Second wall; 3103-Recessed space; 9211-Wire routing hole. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0038] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0041] It is to be understood that when an element as a preamble is referred to as being "on" or "disposed on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like as well as their derivatives, refer to the orientation of the figure and not to the orientation of the apparatus or device being described.

[0042] As shown in Figures 1-3 The present application provides a hair drying appliance, which is mainly used for drying and styling hair. The hair drying appliance comprises a whole body 1000, a circuit board frame 31, a wire control assembly 32 and a heating assembly 10. The whole body 1000 is provided with an air supply channel 1001, and the air supply channel 1001 has an air inlet 315 and an air outlet 201. The circuit board frame 31 is installed in the whole body 1000, and divides the whole body 1000 into a heating cavity 3002 and a circuit cavity 3001. The heating cavity 3002 is located on the air supply channel 1001, and the circuit cavity 3001 is isolated from the air supply channel 1001. The heating assembly 10 is installed in the heating cavity 3002, and the wire control assembly 32 is installed on the circuit board frame 31 and located in the circuit cavity 3001. The side wall of the air supply channel 1001 formed by the circuit board frame 31 is provided with a first wall 3101 and a second wall 3102 in sequence along the air flow direction, and the distance between the second wall 3102 and the heating assembly 10 is less than the distance between the first wall 3101 and the heating assembly 10.

[0043] Specifically, by arranging the circuit board frame 31 in the whole machine body 1000, the whole machine body 1000 is divided into two parts, a heating cavity 3002 and a circuit cavity 3001, and the heating cavity 3002 is located on the side close to the air outlet 201 of the air supply channel 1001. The heating cavity 3002 is used to install the heating assembly 10, and the heating cavity 3002 is arranged on the air supply channel 1001, so that the airflow sent into the air supply channel 1001 is heated by the heating assembly 10 and then sent out from the air outlet 201, thereby realizing the dry hair operation. The wire control assembly 32 is arranged in the circuit cavity 3001, which is isolated from the heating cavity 3002, so as to ensure that the airflow in the heating cavity 3002 does not affect the wire control assembly 32. Moreover, by arranging the first wall 3101 and the second wall 3102 at different distances from the heating assembly 10, the airflow sent into the air supply channel 1001 can change the flow direction along with the difference between the first wall 3101 and the second wall 3102. Because the first wall 3101 is closer to the air outlet of the air supply channel 1001 than the second wall 3102, the connection between the two walls is actually the main area for changing the air direction. The airflow entering the air supply channel 1001 through the air inlet 315 flows along the position close to the first wall 3101 to the joint of the first wall 3101 and the second wall 3102, and changes direction due to the limitation of the side wall at the joint, so as to flow along the second wall 3102 and flow to the air outlet through the heating assembly 10. At the same time, because the change of the airflow direction will cause the loss of wind power, the second wall 3102 is arranged closer to the heating assembly 10 than the first wall 3101, so that the flow cross section between the second wall 3102 and the heating assembly 10 is reduced, thereby improving the airflow speed to meet the requirement of blowing out from the air outlet as efficiently as possible, and the airflow direction is changed to prevent the wind power from flowing towards the side of the circuit cavity 3001.

[0044] That is, through the above arrangement, on the basis of completely isolating the circuit cavity 3001 from the heating cavity 3002, the wire control assembly 32 installed in the circuit cavity 3001 is isolated from the air supply channel 1001 connected to the heating cavity 3002, so that the hot airflow passing through the heating cavity 3002 does not affect the wire control assembly 32 in the circuit cavity 3001 (for example, causing the wire control assembly 32 to overheat or other thermal effects), and the wire control assembly 32 does not affect the hot airflow in the heating cavity 3002 (for example, does not cause the flow of the hot airflow to be turbulent). At the same time, because the first wall 3101 and the second wall 3102 change the air direction and adjust the flow speed, the possibility of the hot airflow flowing towards the side of the circuit cavity 3001 is reduced, thereby improving the dry hair effect and further reducing the influence of the wire control assembly 32 and the hot airflow in the air supply channel 1001.

[0045] In some embodiments, the line board frame 31 is configured with a wire hole 313 at a position corresponding to the first wall 3101, and a first sealing member 91 is arranged at the wire hole 313, and the wire of the heating assembly 10 is connected to the line control assembly 32 through the first sealing member 91. Specifically, the wire on the heating assembly 10 in the heating cavity 3002 is connected to the line control assembly 32 after passing through the wire hole 313 on the line board frame 31. Moreover, the first sealing member 91 arranged at the wire hole 313 ensures the sealing of the wire, and further enhances the sealing between the heating cavity 3002 and the circuit cavity 3001. Meanwhile, the wire hole 313 is arranged at the first wall 3101 of the line board frame 31, reducing the interference between the wire and the electrical elements 323 in the circuit board 325. Of course, such an arrangement is also convenient for the structure of the wire hole 313 itself and the installation of the first sealing member 91 at the wire hole 313. In a specific embodiment, the first sealing member 91 is a wire plug, which has a wire hole 9211 for the wire to pass through. The outer wall of the wire plug is tightly pressed against the hole wall of the wire hole 313, and the hole wall of the wire hole 9211 is tightly pressed against the outer wall of the wire, thereby achieving a sealed connection at the wire and reducing the air leakage in the air supply channel 1001. The wire plug is made of rubber or silica gel.

[0046] As shown in Figure 3 and Figure 6 In some embodiments, the line board frame 31 is configured with a mounting hole 316 extending through the thickness direction of the line board frame 31. The line control assembly 32 includes a circuit board 325 and a heat dissipation member 324 mounted on the side of the circuit board 325 facing the heating cavity 3002, and the heat dissipation member 324 protrudes from the circuit board 325 and is partially embedded in the mounting hole 316.

[0047] Specifically, the installation hole 316 is arranged to facilitate the heat dissipation member 324 to pass through the circuit board frame 31 to contact the cold air flow in the air supply channel 1001, so as to transfer the heat generated by the circuit board 325 during operation to the air supply channel 1001, and on the basis of meeting the temperature rise of the cold air flow in the air supply channel 1001, the heat dissipation of the circuit board 325 is realized. Moreover, the arrangement of the heat dissipation member 324 only allows the heat to flow to the side with lower temperature, i.e. one-way flow heat dissipation, so as to meet the requirement that only the heat of the circuit board 325 is transferred to the cold air flow in the air supply channel 1001 through the heat dissipation member 324. In a specific embodiment, the sealed connection of the heat dissipation member 324 relative to the circuit board frame 31 improves the sealing of the air supply channel 1001, reduces the leakage amount of the air flow towards the circuit cavity 3001, and improves the isolation of the line control assembly 32 relative to the air supply channel 1001. In another specific embodiment, the heat dissipation member 324 is in the form of an arc-shaped heat dissipation fin extending circumferentially along the entire machine body 1000. Such an arrangement improves the contact area between the heat dissipation member 324 and the cold air flow in the air supply channel 1001, thereby improving the heat dissipation effect. In still another specific embodiment, the circuit board 325 is connected with a screw, and the circuit board frame 31 is provided with a screw hole, and the screw is screwed into the screw hole to realize the installation of the circuit board 325 relative to the circuit board frame 31.

[0048] As shown in Figure 3 and Figure 6 In some embodiments, the side of the heat dissipation member 324 facing the heating cavity 3002 is flush with the side of the installation hole 316 facing the heating cavity 3002. Such an arrangement facilitates the air flow entering the air supply channel 1001 to more easily contact the heat dissipation surface of the heat dissipation member 324, thereby removing the heat of the heat dissipation member 324 and meeting the heat dissipation requirement. In other embodiments, the depth of the heat dissipation member 324 extending into the installation hole 316 is less than the depth of the installation hole 316 itself, i.e. the installation of the heat dissipation member 324 relative to the installation hole 316 has an installation allowance in the depth direction, and the installation allowance is between 0.8mm-2mm, for example, it can be 0.8mm, 1.2mm, 1.8mm, 2mm, etc. The arrangement of the installation allowance facilitates the assembly of heat dissipation members 324 with different thicknesses.

[0049] As shown in Figure 3 and Figure 7As shown in some embodiments, the circuit board 325 comprises a first layer board 321 and a second layer board 322 stacked along the axial direction of the whole machine body 1000, and the electrical components 323 are arranged on the first layer board 321 and the second layer board 322, and the first layer board 321 and the second layer board 322 have a height difference along the axial direction of the whole machine body 1000, and the heat dissipation member 324 is arranged on one of the first layer board 321 and the second layer board 322 close to the side of the circuit board frame 31. That is, the circuit board 325 adopts a double-layer board structure, and the electrical components 323 can be distributed on the first layer board 321 and the second layer board 322 according to design requirements or the convenience of structural layout, thereby simplifying the overall design difficulty of the circuit board 325. In particular, compared with a single-layer circuit board 325, the arrangement of the double-layer board can increase the installation space of the electrical components 323 and reduce the load of the single-layer board. At the same time, because the first layer board 321 and the second layer board 322 are stacked along the axial direction of the whole machine body 1000, the diameter of the circuit board 325 is effectively reduced, thereby reducing the radial size of the whole machine body 1000. In addition, the arrangement of the height difference between the two layer boards, that is, there is a gap between the first layer board 321 and the second layer board 322, facilitates the installation of the electrical components 323, thereby reducing the interference between the electrical components 323 on each layer board. Moreover, the arrangement of the first layer board 321 and the second layer board 322 relative to the heat dissipation member 324 not only meets the installation of the heat dissipation member 324 relative to the circuit board 325, but also ensures that the heat dissipation member 324 can be in contact with the cold air flow in the air supply channel 1001, thereby achieving heat dissipation.

[0050] As shown in some embodiments, Figure 3 and Figure 7 In a specific embodiment, the second layer board 322 is located close to the side of the circuit board frame 31, and the radial size of the second layer board 322 along the whole machine body 1000 is smaller than the radial size of the first layer board 321 along the whole machine body 1000. The heat dissipation member 324 is arranged on the second layer board 322. In other words, the separate arrangement of the second layer board 322 and the second layer board 322 not only facilitates the assembly planning of the electrical components 323, but also allows the more important components in the electrical components 323 to be arranged on the first layer board 321 to improve the protection. In a specific embodiment, the first layer board 321 adopts a circular plate to adapt to the cylindrical structure of the whole machine body 1000 as much as possible. The second layer board 322 adopts a special-shaped plate to facilitate the adaptation with the electrical components 323 and the circuit board frame 31, thereby improving the assembly convenience. The first layer board 321 and the second layer board 322 are fixed by a connecting column or directly fixed by screws to form an integral structure. Then, the relative arrangement of the circuit board frame 31 can be completed.

[0051] As shown in some embodiments, Figure 3 and Figure 5As shown in the figure, in one embodiment, the surface of the first wall 3101 is flat, and the surface of the second wall 3102 is curved. Such an arrangement not only allows the air flow to enter the air supply channel 1001 smoothly, but also reduces the wind loss. Moreover, the curved surface makes the contact with the air flow more smooth, so as to facilitate the change of the air flow direction, and further reduce the wind loss. In other embodiments, the first wall 3101 and the second wall 3102 are both curved, or the first wall 3101 is curved and the second wall 3102 is flat. Meanwhile, in another embodiment, the connection between the first wall 3101 and the second wall 3102 is transitioned by a curved surface. The transition direction of the curved surface can weaken the stress concentration phenomenon at the connection, and at the same time improve the smoothness of the air flow.

[0052] As shown in the figure, Figure 3 and Figure 5 In some embodiments, the projection area of the second wall 3102 on the plane of the air outlet 201 side accounts for 45%-49% of the projection area of the circuit board frame 31 on the plane of the air outlet 201 side. Such an arrangement makes the area of the second wall 3102 smaller than the area of the first wall 3101, so as to prevent the air duct at the second wall 3102 in the air supply channel 1001 from being too small to cause the air flow rate to be too large, and improve the protection of the heating assembly 10. Of course, the limitation of the area of the second wall 3102 facilitates the arrangement of the threading hole 313 relative to the circuit board frame 31. In one embodiment, the above projection area accounts for 45%, 46.5%, 48.2%, 49%, etc. In another embodiment, the second wall 3102 is located at the edge of the threading hole 313 by about 2mm-3mm, for example, 2mm, 2.5mm or 3mm, etc.

[0053] As shown in the figure, Figure 3 and Figure 5 In some embodiments, the maximum distance difference between the second wall 3102 and the first wall 3101 relative to the air outlet 201 is between 0.6cm and 1.3cm. Here, the difference refers to the spacing of the first wall 3101 and the second wall 3102 in the axial direction of the whole machine body 1000. Specifically, as mentioned above, the second wall 3102 is closer to the side of the air outlet 201 facing the air supply channel 1001 than the first wall 3101, and the spacing between the first wall 3101 and the second wall 3102 actually affects the length of the air duct after the cross-sectional area is changed. The purpose is to achieve the change of the air direction while reducing the wind loss as much as possible, and to improve the wind speed. In one embodiment, the above axial difference is 0.6cm, 0.86cm, 1cm or 1.3cm.

[0054] As shown in the figure, Figure 3 and Figure 5As shown, in some embodiments, the first wall 3101 and the second wall 3102 are connected in such a way that the flow direction of at least part of the air flow is changed by 60-90 degrees. Specifically, as mentioned above, the air flow flowing along the side close to the first wall 3101 will be changed in direction by the side wall at the joint of the first wall 3101 and the second wall 3102, and thus the limitation of the change angle of the air flow direction is actually the limitation of the angle of the side wall at the joint of the first wall 3101 and the second wall 3102, i.e. the angle of the side wall at the joint compared to the first wall 3101, and further the angle setting relationship of the first wall 3101 compared to the side of the air outlet. For example, when the air flow direction is changed by 90 degrees, the side wall at the joint is perpendicular to the first wall 3101. At this time, the first wall 3101 is parallel to the side of the air outlet, and thus only when the air flow direction is changed by 90 degrees can the air flow smoothly to the air outlet. When the air flow direction is changed by 60 degrees, the first wall 3101 has a 60-degree included angle position relationship with the side of the air outlet. Of course, the change angle of the air flow direction mentioned above can also be 75 degrees, 85 degrees, etc. In fact, the greater the change of the flow direction, the more convenient it is to set the position of the first wall 3101 relative to the air outlet for the design of the circuit board frame 31, and thus the hair dryer is more convenient to design and manufacture.

[0055] As shown in FIG. 3, in some embodiments, the second wall 3102 is connected to the first wall 3101 in such a way that the flow direction of at least part of the air flow is changed by 45-90 degrees. Figure 3 and Figure 5 As shown, in some embodiments, the second wall 3102 is connected to the first wall 3101 in such a way that the flow direction of at least part of the air flow is changed by 45-90 degrees. Specifically, the curved structure of the second wall 3102 can adjust the air flow direction of the air flow flowing along the side close to the second wall 3102 to the side of the air outlet. Thus, the change of the second wall 3102 and the air flow direction is actually the position setting of the second wall 3102 compared to the air outlet. Of course, the greater the change angle of the air flow direction by the second wall 3102, the more convenient it is to design the entire circuit board frame 31. In a specific embodiment, the change angle of the air flow direction by the second wall 3102 is 45 degrees, 80 degrees or 90 degrees.

[0056] As shown in FIG. 3, in some embodiments, the second wall 3102 is connected to the first wall 3101 in such a way that the flow direction of at least part of the air flow is changed by 45-90 degrees. Figures 3-7As shown, in some embodiments, the circuit board frame 31 is configured with a recessed space 3103 at the position of the second wall 3102 and on the side facing the circuit cavity 3001, for accommodating part of the wire control assembly 32. A wire passing hole 313 is located on the circuit board frame 31 at the position corresponding to the first wall 3101. Specifically, the circuit board frame 31 is configured with an open cylinder cavity on the side facing the heating cavity 3002, which surrounds part of the air supply passage 1001, and the first wall 3101, the second wall 3102 and the recessed space 3103 are all arranged on the bottom of the cylinder cavity. The arrangement of the recessed space 3103 on the side of the circuit board frame 31 facing the circuit cavity 3001 allows part of the elements on the circuit board 325 along the axial dimension of the whole machine body 1000 to be arranged in the recessed space 3103 in terms of the side of the circuit board 325, improving the adaptability of the arrangement of the circuit board 325. The wire passing hole 313 is arranged on the first wall 3101 on the bottom of the cylinder cavity and penetrates through the first wall 3101, thereby facilitating the connection of the wire with the wire control assembly 32 in the isolated circuit cavity 3001. Of course, such an arrangement also facilitates the structure of the wire passing hole 313 itself and the installation of the first sealing member 91 at the wire passing hole 313. In a specific embodiment, the size of the recessed space 3103 is related to the axial difference between the second wall 3102 and the first wall 3101, so as to satisfy the air duct guidance while maximizing the installation of the electrical components 323.

[0057] As shown, Figure 2 In some embodiments, the whole machine body 1000 further comprises a touch assembly 2001 arranged on the side of the wire control assembly 32 away from the air outlet 201, the circuit cavity 3001 is arranged between the circuit board frame 31 and the touch assembly 2001, and the touch assembly 2001 is electrically connected with the wire control assembly 32. Specifically, the touch assembly 2001 is arranged for user control to control the hair dryer, such as controlling the power size of the hair dryer. The touch assembly 2001 is arranged on the side away from the air outlet, reducing the interference with the airflow. In fact, when the touch assembly 2001 is working, it will also generate weak heat due to the existence of the touch circuit in the touch assembly 2001. When the circuit cavity 3001 is arranged between the touch assembly 2001 and the circuit board frame 31, the air supply passage 1001 is isolated from the touch assembly 2001 on the basis of satisfying the isolation of the wire control assembly 32 and the air supply passage 1001.

[0058] As shown, Figure 2As shown in the drawings, in one specific embodiment, the touch assembly 2001 is configured with a touch housing 2005, which is buckled on the end of the whole machine shell 2000 away from the air outlet 201, and the touch housing 2005 is sealingly connected with the whole machine shell 2000. Specifically, the whole machine shell 2000 here is wrapped outside the whole machine body 1000, playing a protective role for the whole machine body 1000. The assembly of the touch housing 2005 and the whole machine shell 2000 improves the compactness of the overall installation structure of the whole machine body 1000. At the same time, the sealing connection of the touch housing 2005 and the whole machine shell 2000 meets the sealing requirements of the entire hair dryer itself, and also ensures that the circuit cavity 3001 is in a sealed state to prevent impurities in the external environment from entering the circuit cavity 3001 and damaging the electrical components 323. Among them, an annular sealing ring is arranged between the touch housing 2005 and the whole machine shell 2000 to achieve sealing connection.

[0059] As shown in the drawings, Figure 2 and Figure 3 In some embodiments, the whole machine shell 2000 and the whole machine body 1000 have a heat insulation cavity 3003 around the periphery of the whole machine body 1000, and the heat insulation cavity 3003 at least partially overlaps the heating cavity 3002 along the axial direction of the whole machine body 1000. Specifically, through the arrangement of the heat insulation cavity 3003, the whole machine shell 2000 and the whole machine body 1000 do not directly contact and thus do not directly conduct heat. At the same time, because the main heat source of the hair dryer comes from the heating assembly 10, the relative position relationship between the heat insulation cavity 3003 and the heating assembly 10 makes the heat insulation cavity 3003 be arranged around the heating assembly 10, so as to directly act on the heat generated by the heating assembly 10 in the most direct way, thereby effectively reducing the heat loss in the air supply channel 1001, so that the heat in the air supply channel 1001 is used as much as possible or almost completely for actual hair drying operation, thereby improving the actual use of effective heat of the hair dryer and improving the hair drying effect. Moreover, it is because of the arrangement of the heat insulation cavity 3003 that the heat generated by the heating assembly 10 does not directly conduct to the whole machine shell 2000, thereby reducing the risk of overheating of the whole machine shell 2000 and improving the safety in use.

[0060] As shown in the drawings, Figure 2 and Figure 3 In one specific embodiment, the heat insulation cavity 3003 is arranged in an annular shape along the axial direction of the whole machine body 1000, and the heat insulation cavity 3003 is wrapped outside the heating cavity 3002. Such an arrangement makes the heating assembly 10 have heat insulation cavities 3003 distributed along the circumferential direction of the heating assembly 10, thereby improving the heat insulation area and strengthening the effect of preventing heat loss. In other embodiments, the heat insulation cavity 3003 is arranged in an arc shape, and there are a plurality of heat insulation cavities 3003 arranged at intervals around the periphery of the heating assembly 10.

[0061] As shown in the drawings, Figure 2 andFigure 3 As shown in some embodiments, the heat insulation cavity 3003 has a radial width of 0.5-2 mm along the radial width of the whole machine body 1000. By limiting the size of the radial width of the heat insulation cavity 3003, a safe heat insulation distance between the whole machine body 1000 and the whole machine shell 2000 is ensured, i.e. while reducing heat loss, the hair dryer has a small size along the radial direction of the whole machine body 1000, and the stability of the assembly of the whole machine body 1000 relative to the whole machine shell 2000 is improved. The radial width of the heat insulation cavity 3003 is 0.5 mm, 0.7 mm, 1 mm, 1.5 mm or 2 mm.

[0062] As shown in some embodiments, the whole machine body 1000 further comprises a barrel 20 extending along the axis of the air supply channel 1001, and the barrel 20 is sealingly connected to the circuit board frame 31 away from the air outlet 201. The barrel 20 and the circuit board frame 31 jointly define the air supply channel 1001. The air outlet 201 is arranged on the side of the barrel 20 away from the circuit board frame 31, and the air inlet 315 is arranged on the side of the circuit board frame 31 close to the first wall 3101. The heat insulation cavity 3003 is arranged at least between the barrel 20 and the whole machine shell 2000. Figure 2 Figure 3 As shown in some embodiments, the whole machine body 1000 further comprises a barrel 20 extending along the axis of the air supply channel 1001, and the barrel 20 is sealingly connected to the circuit board frame 31 away from the air outlet 201. The barrel 20 and the circuit board frame 31 jointly define the air supply channel 1001. The air outlet 201 is arranged on the side of the barrel 20 away from the circuit board frame 31, and the air inlet 315 is arranged on the side of the circuit board frame 31 close to the first wall 3101. The heat insulation cavity 3003 is arranged at least between the barrel 20 and the whole machine shell 2000.

[0063] Specifically, the heating cavity 3002 is the barrel cavity of the barrel 20, and the heating assembly 10 is installed in the barrel cavity. The barrel 20 and the circuit board frame 31 jointly define the air supply channel 1001, so that the airflow heated by the heating assembly 10 is sent out from the air outlet 201 for drying hair. At the same time, the sealing connection between the barrel 20 and the circuit board frame 31 improves the sealing performance of the air supply channel 1001 and reduces the leakage of the airflow in the air supply channel 1001. When the heat insulation cavity 3003 is arranged between the barrel 20 and the whole machine shell 2000, it surrounds the outside of the heating cavity 3002, thereby reducing the heat loss in the heating cavity 3002. When the heat insulation cavity 3003 is arranged between the barrel 20, the circuit board frame 31 and the whole machine shell 2000, the heat loss in the heating cavity 3002 is reduced while the air leakage in the air supply channel 1001 is also reduced.

[0064] As shown in some embodiments, the whole machine body 1000 further comprises a barrel 20 extending along the axis of the air supply channel 1001, and the barrel 20 is sealingly connected to the circuit board frame 31 away from the air outlet 201. The barrel 20 and the circuit board frame 31 jointly define the air supply channel 1001. The air outlet 201 is arranged on the side of the barrel 20 away from the circuit board frame 31, and the air inlet 315 is arranged on the side of the circuit board frame 31 close to the first wall 3101. The heat insulation cavity 3003 is arranged at least between the barrel 20 and the whole machine shell 2000. Figure 2 Figure 3 ​​As shown, in some embodiments, the heat insulation cavity 3003 is connected to the aforementioned circuit cavity 3001. In this case, a gap is reserved between the housing 2000 and the circuit board frame 31, and this gap also serves as part of the heat insulation cavity 3003, thereby allowing the heat insulation cavity 3003 to surround the periphery of the cylinder 20 and the circuit board frame 31. The gap between the housing 2000 and the circuit board frame 31 is smaller than the gap between the housing 2000 and the cylinder 20. In other embodiments, the heat insulation cavity 3003 is not connected to the aforementioned circuit cavity 3001, and therefore, there is no gap between the periphery of the housing 2000 and the circuit board frame 31.

[0065] like Figure 2 , Figure 3 and Figure 8 As shown, in some embodiments, the cylinder 20 includes an inner cylinder 21 and an outer cylinder 22 sleeved on the outside of the inner cylinder 21. The heating assembly 10 is disposed between the inner cylinder 21 and the outer cylinder 22, and the end of the outer cylinder 22 facing away from the air outlet 201 is sealed to the circuit board frame 31 by a second sealing member 92. A heat insulation cavity 3003 is disposed between the outer cylinder 22 and the overall housing 2000, and at least the inner wall of the outer cylinder 22 facing the heating assembly 10 is provided with a heat insulation sheet 23. Specifically, the heating cavity 3002 is located between the outer wall of the inner cylinder 21 and the inner wall of the outer cylinder 22, and the heating assembly 10 is installed in the heating cavity 3002, thereby supporting the heating assembly 10 through the joint constraint of the inner cylinder 21 and the outer cylinder 22. The outer cylinder 22 is not only used to cooperate with the circuit board frame 31, but also to form protection for the heating assembly 10 and the inner cylinder 21. At the same time, the outer cylinder 22 can be snapped into place with the overall housing 2000 covering the outside. For example, multiple circumferentially spaced limiting ribs are provided on the outer wall of the housing 2000, which are snapped onto the outer cylinder 22. Alternatively, the outer cylinder 22 can be fixed to the housing 2000 using a snap-fit ​​arm and snap-fit ​​groove assembly method. Furthermore, the circuit board frame 31 can be axially fixed to the housing 2000 via its outer arc-shaped structure, and also axially fixed to the touch housing 2005 mounted on the rear side, thereby achieving assembly of the entire hair dryer head 1 and improving compactness. The heat insulation sheet 23 on the outer cylinder 22 reduces the heat directly transferred from the heating assembly 10 to the outer cylinder 22. In other embodiments, a heat insulation sheet 23 is provided around the outer wall of the inner cylinder 21, thereby reducing the heat transferred from the heating assembly 10 to the inner cylinder 21. Simultaneously, the second seal 92 between the outer cylinder 22 and the circuit board frame 31 improves the sealing of the air supply channel 1001 and reduces air leakage. In one specific embodiment, the heat insulation sheet 23 is made of mica. In another specific embodiment, the heat insulation sheet 23 is arranged around the outer cylinder 22 along the axial direction of the outer cylinder 22. That is, the heat insulation sheet 23 is arranged around the outer cylinder 22 along the circumference, so that the heating component 10 has a heat insulation effect with the outer cylinder 22 at every point along the circumference, thereby enhancing the effect of preventing heat loss.

[0066] As Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8 indicated, in another specific embodiment, the second sealing member 92 is a sealing ring. The outer cylinder 22 is provided with a slot 221 at one end away from the air outlet 201 of the air supply channel 1001, and the second sealing member 92 is accommodated in the slot 221. The one end of the circuit board frame 31 towards the air outlet 201 is provided with a plug 311, which is inserted into the slot 221 and pressed against the second sealing member 92. Further, the outer wall of the outer cylinder 22 is provided with a clamping arm 222 extending axially, and the clamping arm 222 is configured with a clamping hole 2221. Correspondingly, the outer wall of the circuit board frame 31 is provided with a clamping protrusion 312 protruding radially outward, which can be clamped into the clamping hole 2221, further improving the connection reliability of the outer cylinder 22 and the circuit board frame 31. The number of clamping arms 222 corresponds to the number of clamping protrusions 312, improving the stress balance.

[0067] As Figure 2 and Figure 3 indicated, in some embodiments, the hair dryer further comprises a handle 40 connected to the whole machine body 1000 and a switch assembly 42 mounted on the handle 40, the handle 40 is configured with an air inlet channel 41 communicating with the air inlet 315 of the air supply channel 1001 and a mounting cavity 3004 isolated from the air inlet channel 41, the switch assembly 42 is at least partially assembled in the mounting cavity 3004, and the switch assembly 42 is electrically connected with the wire control assembly 32. The handle 40 is sealingly connected with the whole machine body 1000.

[0068] Specifically, the handle 40 is configured to be held by the user to perform the drying operation. The switch assembly 42 is configured to be controlled by the user to start and stop the dryer, and is configured to cooperate with the touch assembly 2001 to adjust the wind speed and the use of hot air and cold air after the dryer is started. The handle 40 is provided with an air inlet channel 41, and the air inlet channel 41 has an air inlet 44 arranged on the handle 40. The handle 40 is provided with a motor 43, and the motor 43 is electrically connected to the circuit board 325 through wires. The switch assembly 42 controls the motor 43 to drive through the circuit board 325. The air flow in the external environment enters the air inlet 44 on the handle 40, is transported to the air supply channel 1001 on the whole machine body 1000 along the air inlet channel 41 under the air suction power of the dryer, and is then sent out from the air outlet 201 of the air supply channel 1001 to be used for drying. Of course, in use, the heating assembly 10 does not necessarily have to work, and only the air flow in the external environment can be converted into a high-speed flowing air flow through the air supply channel 1001. The use of the heating assembly 10 can be controlled by the touch assembly 2001. At the position of the handle 40 for mounting the switch assembly 42, the button part on the switch assembly 42 protrudes out of the mounting cavity 3004 to facilitate the user to operate. By arranging the mounting cavity 3004 which is isolated from the air inlet channel 41, the circuit in the switch assembly 42 is isolated from the air flow in the air inlet channel 41 while meeting the assembly of the switch assembly 42, thereby reducing the mutual influence between them.

[0069] As shown in Figure 2 , Figure 3 and Figure 6 , in some embodiments, the handle 40 includes an air duct shell 2006 and a handle shell 2003 covering the outside of the air duct shell 2006, and the mounting cavity 3004 is configured between the handle shell 2003 and the air duct shell 2006. Specifically, the air duct shell 2006 can be inwardly recessed at the position of the handle 40 where the switch assembly 42 is mounted, so that a mounting cavity 3004 is formed between the inner wall of the handle shell 2003 and the outer wall of the air duct shell 2006, thereby realizing the assembly of the switch assembly 42. Through such a configuration, the diameter of the handle 40 can be reduced, and the user can hold it more easily. The mounting cavity 3004 is arranged as much as possible at a position of the handle 40 which is relatively large in the direction towards the heating assembly 10 or is relatively large in the direction affected by heat. In a specific embodiment, the mounting cavity 3004 is in communication with the circuit cavity 3001 described above, and when the circuit cavity 3001 is in communication with the heat insulation cavity 3003, the mounting cavity 3004, the circuit cavity 3001 and the heat insulation cavity 3003 are in communication in sequence, thereby achieving the isolation of the air duct and the circuit as described above, and also reducing the leakage of heat and air flow through the three cavities surrounding the periphery. It should be noted that none of the three cavities (the mounting cavity 3004, the heat insulation cavity 3003 and the circuit cavity 3001) has air for drying and styling.

[0070] As Figure 2 , Figure 3 and Figure 6 shown, in some embodiments, the handle shell 2003 cooperates with the whole machine shell 2000. Specifically, a radially extending extension shell segment 2004 is provided on the whole machine shell 2000 at the air inlet 315 of the air supply passage 1001, and the front end of the handle 40 extends into the extension shell segment 2004. The handle shell 2003 and the air duct shell 2006 have a mounting gap therebetween, and the extension shell segment 2004 is inserted into the mounting gap and can be fastened by screws. In summary, it can be understood that the above-mentioned whole machine body 1000, as well as the circuit board rack 31, the wire control assembly 32, the heating assembly 10 mounted in the whole machine body 1000, and the whole machine shell 2000 covering the outside of the whole machine body 1000 together constitute the head 1 of the hair dryer. At the same time, the handle 40, the switch assembly 42, the motor 43, and the motor 43 power supply line connected to the tail side of the handle 40 together constitute the tail 2 of the hair dryer. It should be noted in advance that, as Figures 1-3 shown, in the present embodiment, the axial direction of the barrel 20 is the axial direction of the whole machine body 1000, the radial direction of the barrel 20 is the radial direction of the whole machine body 1000, and the handle 40 extends along the radial direction of the barrel 20. Thus, a hair dryer approximately in the shape of a "7" is formed.

[0071] As Figure 2 , Figure 3 and Figure 7 shown, in some embodiments, a third sealing member 93 is provided at the air inlet 315, and the third sealing member 93 is used to seal and connect the air duct shell 2006 and the circuit board rack 31. Specifically, the provision of the third sealing member 93 improves the sealing performance at the joint of the air supply passage 1001 and the air inlet passage 41, and reduces air leakage. The third sealing member 93 is an irregularly shaped sealing ring, and its purpose is to adapt to the air inlet 315 on the circuit board rack 31. The third sealing member 93 is bonded to the edge of the air inlet 315 on the circuit board rack 31, the front end of the air duct shell 2006 in the handle 40 is pressed against the third sealing member 93, and is fixed with the circuit board rack 31, and at the same time, the handle shell 2003 is fixedly connected with the whole machine shell 2000, thereby realizing sealed connection.

[0072] The technical features of the above-mentioned embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0073] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A hair drying device, characterized in that, The hair drying device includes: The main body (1000) is constructed with an air supply channel (1001), which has an air inlet (315) and an air outlet (201). A circuit board frame (31) is installed inside the main body (1000) and divides the main body (1000) into a heating chamber (3002) and a circuit chamber (3001). The heating chamber (3002) is located on the side of the air supply channel (1001) near the air outlet (201). The circuit chamber (3001) is isolated from the air supply channel (1001). The side wall of the circuit board frame (31) forming the air supply channel (1001) is provided with a first wall (3101) and a second wall (3102) in sequence along the airflow direction. The wired control assembly (32) is mounted on the circuit board frame (31) and located within the circuit cavity (3001); A heating component (10) is installed inside the heating chamber (3002), and the distance between the second wall (3102) and the heating component (10) is less than the distance between the first wall (3101) and the heating component (10); The first wall (3101) is located near the air inlet (315) of the air supply channel (1001). The connection between the first wall (3101) and the second wall (3102) is transitioned by a curved surface. The airflow entering through the air inlet (315) of the air supply channel (1001) flows along the position near the first wall (3101) to the junction of the first wall (3101) and the second wall (3102), where it changes direction to flow along the second wall (3102) and flows through the heating assembly (10) to the air outlet (201).

2. The hair drying device according to claim 1, characterized in that, The circuit board frame (31) is constructed with mounting holes (316) that extend through its own thickness. The wired control assembly (32) includes a circuit board (325) and a heat sink (324) mounted on the side of the circuit board (325) facing the heating cavity (3002). The portion of the heat sink (324) protruding from the circuit board (325) is embedded in the mounting hole (316).

3. The hair drying device according to claim 2, characterized in that, The side of the heat sink (324) facing the heating cavity (3002) is flush with the side of the mounting hole (316) facing the heating cavity (3002).

4. The hair drying device according to claim 2, characterized in that, The circuit board (325) includes a first layer (321) and a second layer (322) stacked along the axial direction of the main body (1000), and electrical components (323) disposed on the first layer (321) and the second layer (322). The first layer (321) and the second layer (322) have a height difference along the axial direction of the main body (1000). The heat sink (324) is disposed on one of the first layer (321) and the second layer (322) near the side of the circuit board frame (31).

5. The hair drying device according to claim 4, characterized in that, The second layer plate (322) is located on the side close to the circuit board frame (31), and the dimension of the second layer plate (322) along the radial direction of the whole body (1000) is smaller than the dimension of the first layer plate (321) along the radial direction of the whole body (1000); the heat sink (324) is mounted on the second layer plate (322).

6. The hair drying device according to claim 1, characterized in that, The maximum distance difference between the second wall (3102) and the first wall (3101) relative to the air outlet (201) is between 0.6cm and 1.3cm.

7. The hair drying device according to claim 1, characterized in that, The projected area of ​​the second wall (3102) relative to the side plane of the air outlet (201) accounts for 45%-49% of the projected area of ​​the circuit board frame (31) relative to the side plane of the air outlet (201).

8. The hair drying device according to claim 1, characterized in that, The connection between the first wall (3101) and the second wall (3102) causes at least a portion of the airflow direction to change by 60-90 degrees.

9. The hair drying device according to claim 8, characterized in that, The second wall (3102) causes at least a portion of the airflow direction to change by 45 to 90 degrees.

10. The hair drying device according to claim 1, characterized in that, The circuit board frame (31) is located at the position of the second wall (3102) and has a recessed space (3103) on the side facing the circuit cavity (3001), the recessed space (3103) being used to accommodate part of the wire control assembly (32).

11. The hair drying appliance according to claim 1, characterized in that, A wire hole (313) is constructed on the circuit board frame (31) at the position corresponding to the first wall (3101), and a first sealing element (91) is provided at the wire hole (313). The wire of the heating component (10) passes through the first sealing element (91) and is connected to the wire control component (32).

12. The hair drying appliance according to claim 1, characterized in that, The hair drying appliance also includes a housing (2000) covering the outside of the main body (1000), and the housing (2000) and the main body (1000) have a heat insulation cavity (3003) surrounding the periphery of the main body (1000), and the heat insulation cavity (3003) at least partially overlaps with the heating cavity (3002) along the axial direction of the main body (1000).

13. The hair drying appliance according to claim 12, characterized in that, The radial width of the heat insulation cavity (3003) along the main body (1000) is between 0.5mm and 2mm.

14. The hair drying appliance according to claim 12, characterized in that, The main body (1000) also includes a cylindrical body (20) extending along the axis of the air supply channel (1001). The side of the cylindrical body (20) away from the air outlet (201) is sealed to the circuit board frame (31). The cylindrical body (20) and the circuit board frame (31) together form the air supply channel (1001). The air outlet (201) is located on the side of the cylindrical body (20) away from the circuit board frame (31). The air inlet (315) is located on the side of the circuit board frame (31) near the first wall (3101). The heat insulation cavity (3003) is at least located between the cylinder (20) and the casing (2000).

15. The hair drying appliance according to claim 14, characterized in that, The cylinder (20) includes an inner cylinder (21) and an outer cylinder (22) sleeved on the outside of the inner cylinder (21). The heating component (10) is disposed between the inner cylinder (21) and the outer cylinder (22), and the end of the outer cylinder (22) facing away from the air outlet (201) is sealed to the circuit board frame (31) through a second sealing member (92). The heat insulation cavity (3003) is disposed between the outer cylinder (22) and the housing (2000), and at least the outer cylinder (22) is provided with a heat insulation sheet (23) facing the inner wall of the heating assembly (10).

16. The hair drying appliance according to claim 12, characterized in that, The hair drying appliance also includes a handle (40) connected to the main body (1000) and a switch assembly (42) installed on the handle (40). The handle (40) is configured with an air inlet channel (41) communicating with the air inlet (315) of the air supply channel (1001) and a mounting cavity (3004) isolated from the air inlet channel (41). The switch assembly (42) is at least partially assembled in the mounting cavity (3004) and is electrically connected to the wired control assembly (32). The handle (40) is sealed to the main body (1000).

17. The hair drying appliance according to claim 16, characterized in that, The handle (40) includes an air duct housing (2006) and a handle housing (2003) covering the outside of the air duct housing (2006), and the mounting cavity (3004) is constructed between the handle housing (2003) and the air duct housing (2006).

18. The hair drying appliance according to claim 17, characterized in that, A third sealing element (93) is pressed at the air inlet (315), and the third sealing element (93) is used to seal the air duct housing (2006) and the circuit board frame (31).

19. The hair drying appliance according to claim 16, characterized in that, At least one of the mounting cavity (3004) and the heat insulation cavity (3003) is in communication with the circuit cavity (3001).

20. The hair drying appliance according to claim 12, characterized in that, The main body (1000) also includes a touch component (2001) installed on the side of the wired control component (32) away from the air outlet (201). The circuit cavity (3001) is disposed between the circuit board frame (31) and the touch component (2001), and the touch component (2001) is electrically connected to the wired control component (32).

21. The hair drying appliance according to claim 20, characterized in that, The touch component (2001) is configured with a touch housing (2005), which is fastened to the end of the main housing (2000) away from the air outlet (201), and the touch housing (2005) is sealed to the main housing (2000).

Images