Hair dryer

Abstract

The present invention relates to the field of hair dryers, and provides a hair dryer. The hair dryer comprises a main body housing; the main body housing comprises a first housing and an inner handle housing; the first housing has a first central axis, and two axial ends of the first housing are respectively a wind outlet end and a wind blocking end; the distance between the wind outlet end and the wind blocking end is less than a preset distance; the inner handle housing is connected to the axial middle of the first housing; the inner handle housing has a second central axis; and the first central axis and the second central axis form a preset angle. According to the hair dryer of the present invention, the distance between two axial ends of the first housing is less than a preset distance, such that the main body housing of the hair dryer can satisfy the design requirements of small axial length and small size, thereby achieving good use experience.

Description

A hair dryer Technical Field

[0001] The present invention relates to the field of hair dryers, and further to a hair dryer. Background Art

[0002] A hair dryer consists of a main body and a handle. The handle is equipped with fan blades and a motor, and the main body is equipped with a heating component, a PCB board and a mounting bracket. However, due to the thickness of the electronic components on the PCB board, the axial length of the heating component and the installation position of the mounting bracket, the space inside the main body is extremely tight. Most general hair dryers meet the length requirements of the heating component and the thickness requirements of the PCB board by increasing the axial length of the main body. This results in the main body being too long and unable to meet the compact requirements and user experience.

[0003] Summary of the Invention

[0004] In response to the above technical problems, the purpose of the present invention is to provide a hair dryer in which the axial distance between the two ends of the first shell is less than the preset distance. At this time, the main shell of the hair dryer can meet the design requirements of small axial length and small volume, and has an excellent user experience.

[0005] To achieve the above-mentioned object, the present invention provides a hair dryer, comprising a main body shell, the main body shell comprising a first outer shell and a handle inner shell, the first outer shell having a first central axis and axial ends of the first outer shell respectively defining an air outlet end and a wind shield end, wherein the distance between the air outlet end and the wind shield end is less than a preset distance;

[0006] The handle inner shell is connected to the axial middle portion of the first outer shell, the handle inner shell has a second central axis, and the first central axis and the second central axis form a preset angle;

[0007] In some embodiments, the diameter length of the handle inner shell does not exceed the axial length of the first outer shell, and the distance from the connection between the first outer shell and the handle inner shell to the air outlet end is less than the radius of the handle inner shell; the distance from the connection between the first outer shell and the handle inner shell to the wind shielding end is less than the radius of the handle inner shell.

[0008] In some embodiments, the air outlet end is provided with an air outlet housing, a heating component, a PCB board, and a first mounting bracket are provided in the air outlet housing, the first mounting bracket is provided between the heating component and the PCB board, the first mounting bracket is fixedly connected to the heating component and the PCB board, and the heating component is close to the air outlet end;

[0009] The windshield end is provided with a windshield shell, and the windshield shell is fixedly connected to the first mounting frame.

[0010] In some embodiments, the PCB board is relatively located on a side of the second central axis close to the windshield end;

[0011] There are gaps between the first mounting frame and the PCB board and the heating component. One end of the heating component is relatively located on the side of the second central axis close to the windshield end.

[0012] In some embodiments, the handle inner shell further comprises a control portion at one end close to the first outer shell, and the control portion is recessed along the radial direction of the handle inner shell toward the air outlet end.

[0013] The control part has a second guide surface and a third guide surface, the second guide surface is provided at one end of the control part close to the first shell, and the PCB board is flush with the second guide surface close to one end of the handle inner shell;

[0014] The third guide surface is provided at an end of the control portion away from the first housing.

[0015] In some embodiments, a guide member is further provided at one end of the handle inner shell close to the first outer shell, the guide member being close to the air outlet end, the guide member having a first guide surface, the first guide surface and the second guide surface being oriented relative to each other, so that the cold air flow from the handle inner shell can flow toward the PCB board along the direction of the first guide surface of the guide member;

[0016] The first mounting frame is further provided with a plurality of first through holes, so that the airflow passing through the PCB board can flow along the first central axis through the first through holes to the air outlet end and flow through the heating component.

[0017] In some embodiments, the heating assembly includes a heating wire assembly, an annular inner shell, an annular outer shell, and a second mounting frame. The annular inner shell is provided with a plurality of supporting members along the first central axis. The heating wire assembly is provided on each of the supporting members around the first central axis. An end of the heating wire assembly close to the windshield end is relatively located on the second central axis.

[0018] The annular outer shell and the annular inner shell are both arranged on a side of the second mounting frame close to the air outlet end, and the annular outer shell is coaxially sleeved on the outer side of the annular inner shell.

[0019] In some embodiments, the support member is symmetrical along the second central axis, and a support member close to the handle inner shell is arranged along the second central axis, so that the airflow passing through the support frame is split and flows symmetrically to both sides of the heating component.

[0020] In some embodiments, the annular inner shell is sleeved on a side of the second mounting bracket close to the air outlet end, and the second mounting bracket is further provided with a fixing groove at a corresponding position of the support member, and the support member is snapped into the fixing groove.

[0021] In some embodiments, a first fastener and a first fixing structure are provided at one end of the first mounting frame, the first fastener is fastened to four edges of the PCB board, and the first fixing structure passes through the PCB board and is fixedly connected to the windshield housing;

[0022] A second fastener and a second fixing structure are provided at the other end of the first mounting bracket. The second fastener is fastened to the second mounting bracket, and the second fixing structure is fixedly connected to the second mounting bracket.

[0023] In some embodiments, a thermistor and a thermostat are further provided at one end of the annular inner shell close to the air outlet end, the thermistor and the thermostat are symmetrical relative to the first central axis, and the thermistor and the thermostat are relatively located in the middle of the left and right sides of the outer ring surface of the annular inner shell.

[0024] In some embodiments, a capacitor is further provided in the middle of one end of the PCB board close to the air outlet end. The capacitor passes through the first mounting bracket and the second mounting bracket to reach the inside of the annular inner shell, and the capacitor does not exceed the annular inner shell.

[0025] In some embodiments, the handle inner shell includes a first inner shell and a second inner shell, and an annular connecting portion is provided at one end of the first inner shell close to the first outer shell, and the annular connecting portion fixes the middle portion of the first outer shell;

[0026] The second housing is engaged with the first housing along the first central axis, and the first housing is close to the air outlet.

[0027] In some embodiments, a control portion is provided on a side of the first housing close to the wind shielding end, a first plug-in portion is provided on a side of the annular connecting portion close to the wind outlet end, and a flow guide is plugged into the first plug-in portion;

[0028] An air supply component is also provided inside the first shell.

[0029] In some embodiments, the handle further comprises a second outer shell, wherein the second outer shell is sleeved on the handle inner shell along the second central axis.

[0030] A cover shell and an inner filter frame are further provided at one end of the second shell away from the first shell. The inner filter frame is clamped on the first shell, and the cover shell is detachably mounted on the inner filter frame through a magnetic structure.

[0031] Compared with the prior art, the hair dryer provided by the present invention has the following beneficial effects:

[0032] 1. The axial distance between the two ends of the first shell is less than the preset distance. At this time, the main shell of the hair dryer can meet the design requirements of small axial length and small volume, and has an excellent user experience.

[0033] 2. The distance from the connection between the handle inner shell and the first outer shell to the air outlet end and the wind shield end is less than or equal to the radius of the handle inner shell, so that the axial length of the main shell is less than or equal to twice the diameter of the handle inner shell. At this time, the axial length of the main shell does not exceed twice the diameter of the handle inner shell. The first outer shell has the design characteristics of small axial length and small volume.

[0034] 3. The end of the heating component close to the windshield end is relatively located on the side of the second central axis close to the windshield end, so that the hair dryer of the present invention can retain the axial length of the heating component as much as possible, so that the heating component can heat the airflow faster and better, thereby ensuring the hot air effect of the hair dryer.

[0035] 4. The PCB board is flush with the second guide surface near one end of the handle inner shell. The cold air flow in the handle inner shell passes through the second and third guide surfaces of the control unit and can reach the surface of the PCB board, which is beneficial to the heat dissipation of the PCB board and prevents the PCB board from overheating and shortening its service life.

[0036] 5. An air guide is further provided at one end of the inner shell of the handle close to the first outer shell. The first guide surface and the second guide surface of the air guide are oriented relative to each other, which can reduce the cross-sectional area of ​​the air duct at the ventilation slot, thereby increasing the wind speed of the cold air flow through the ventilation slot, increasing the fluidity of the cold air flow, and not easily causing accumulation, so that the cold air flow flows to the front and rear sides of the PCB board, and the cold air flow gathers around the PCB board, further enhancing the heat dissipation effect of the PCB board.

[0037] 6. A support member close to the inner shell of the handle is arranged along the second central axis, so that the airflow passing through this support member is split and flows symmetrically to both sides of the heating component. The airflow on both sides of the heating component is more uniform, thereby making the air outlet and heating effect stable and reliable.

[0038] 7. The annular inner shell is sleeved on the second mounting frame, and the support member is inserted into the fixing groove, so that the annular inner shell and the support member are firmly fixed on the second mounting frame, which can facilitate the fixed connection between the heating component and the first mounting frame; at the same time, this fixing method can effectively reduce the axial length of the heating component.

[0039] 8. The thermistor and the thermostat are symmetrical with each other along the first central axis, and the spatial layout is more reasonable. At the same time, the thermistor and the thermostat are relatively far apart, so that the temperature of the hot air passing through the heating wire assembly can be monitored over a larger range. At the same time, the support member divides the annular inner shell into equal parts, and the thermistor and the thermostat are relatively located in the middle of the left and right sides of the outer ring surface of the annular inner shell, just at the two points with the highest temperature in the annular outer shell, so that the thermistor and the thermostat can timely and accurately monitor the temperature of the hot air passing through the heating wire assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0041] FIG1 is an overall view of a hair dryer;

[0042] FIG2 is a side view of the main body shell;

[0043] FIG3 is a cross-sectional view of a hair dryer;

[0044] Figure 4 is a diagram showing the location of the PCB board;

[0045] Figure 5 is an exploded view of the hair dryer;

[0046] Figure 6 is a structural diagram of the air outlet housing;

[0047] FIG7 is a structural diagram of a heating component;

[0048] FIG8 is an installation diagram of the annular inner shell;

[0049] FIG9 is a structural diagram of a first mounting frame;

[0050] FIG10 is a connection diagram of the heating component and the PCB board;

[0051] FIG11 is a position diagram of the guide member and the control portion;

[0052] FIG12 is a structural diagram of a control unit;

[0053] FIG13 is a structural diagram of the guide member;

[0054] Figure 14 is a position diagram of the cover and the inner filter frame.

[0055] Description of the accompanying drawings: Main body shell 1, first outer shell 11, air outlet shell 111, windshield shell 112, handle inner shell 12, first inner shell 121, first plug-in portion 1211, second inner shell 122, control portion 123, second guide surface 1231, third guide surface 1232, fourth guide surface 1233, guide member 124, first guide surface 1241, fifth guide surface 1242, first slot 1243, thermistor 125, thermostat 126, generator Thermal assembly 2, heating wire assembly 21, annular inner shell 22, support member 221, annular outer shell 23, second mounting bracket 24, fixing groove 241, second supporting portion 242, PCB board 3, capacitor 31, first mounting bracket 4, first through hole 41, first snap fastener 42, first fixing structure 43, second snap fastener 44, second fixing structure 45, first supporting portion 46, air supply assembly 5, second outer shell 6, cover shell 61, inner filter frame 62. DETAILED DESCRIPTION

[0056] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0057] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0058] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0059] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0060] In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered within the scope of protection of the present invention.

[0061] Referring to Figures 1 to 2, the present invention provides a hair dryer, which includes a main body shell 1, which includes a first outer shell 11 and a handle inner shell 12. The first outer shell 11 has a first central axis, and the axial ends of the first outer shell 11 are respectively an air outlet end and a wind shield end, and the distance between the air outlet end and the wind shield end is less than a preset distance; the handle inner shell 12 is connected to the axial middle part of the first outer shell 11, and the handle inner shell 12 has a second central axis, and the first central axis and the second central axis form a preset angle.

[0062] In this embodiment, the axial distance between the two ends of the first shell 11 is less than the preset distance. At this time, the main shell of the hair dryer can meet the design requirements of small axial length and small volume, and has an excellent user experience.

[0063] Specifically, the handle inner shell 12 and the first outer shell 11 have a connecting end surface. This connecting end surface has a first end and a second end along the first central axis. The first end is proximal to the air outlet, and the second end is proximal to the windshield. The distance between the air outlet and the windshield is less than a predetermined distance, which is no more than twice the distance between the first and second ends. The distance between the first and second ends is L1, the distance between the first end and the air outlet is L2, and the distance between the second end and the windshield is L3. L1+L2+L3≤2*L1. In other words, L2+L3≤L1. The sum of the distance between the first end and the air outlet and the distance between the second end and the windshield is less than the distance between the first and second ends. Preferably, the distance between the first end and the air outlet is no more than half the distance between the first and second ends, i.e., L2≤L1*1 / 2; and the distance between the second end and the windshield is no more than half the distance between the first and second ends, i.e., L3≤L1*1 / 2. In this manner, the main housing of the hair dryer meets the design requirements of a short axial length and a compact size, providing an excellent user experience.

[0064] It is worth noting that in this embodiment, the preset angle between the first central axis and the second central axis is not further limited. As long as the distance between the air outlet end and the wind shield end is less than the preset distance, it is within the protection scope of this application.

[0065] Furthermore, the handle inner shell and the first outer shell are both annular and the first central axis and the second central axis are at 90 degrees, that is, the first outer shell 11 and the handle inner shell 12 are relatively perpendicular, and the handle inner shell 12 and the first outer shell 11 are connected. At this time, the distance between the first end and the second end is the diameter length of the handle inner shell 12, and the diameter length of the handle inner shell 12 does not exceed the axial length of the first outer shell 11. The distance from the connection between the first outer shell 11 and the handle inner shell 12 to the air outlet end does not exceed the radius of the handle inner shell 12; the distance from the connection between the first outer shell 11 and the handle inner shell 12 to the windshield end does not exceed the radius of the handle inner shell 12, so that the axial length of the main shell 1 does not exceed twice the diameter of the handle inner shell 12. At this time, the main shell 1 of the hair dryer can meet the design requirements of small axial length and small volume, and has an excellent user experience.

[0066] Specifically, the length of the handle inner shell 12 along the first central axis and close to the windshield end to the windshield end of the main shell 1 is a first length, and the first length is less than or equal to the radius of the handle inner shell 12; the length of the handle inner shell 12 along the first central axis and close to the wind outlet end to the wind outlet end of the main shell 1 is a second length, and the second length is also less than or equal to the radius of the handle inner shell 12; at this time, the sum of the first length plus the second length is less than or equal to the diameter of the handle inner shell 12, thereby making the axial length of the main shell 1 less than or equal to twice the diameter of the handle inner shell 12.

[0067] In more detail, referring to FIG5 , an air outlet end is provided with an air outlet housing 111, in which a heating component 2, a PCB board 3, and a first mounting bracket 4 are provided. The first mounting bracket 4 is provided between the heating component 2 and the PCB board 3, and the first mounting bracket 4 is fixedly connected to the heating component 2 and the PCB board 3. The heating component 2 is close to the air outlet end; a windshield end is provided with a windshield housing 112, and the windshield housing 112 is fixedly connected to the first mounting bracket 4. In this embodiment, the first mounting bracket 4 is fixedly connected to the heating component 2 and the PCB board 3. The heating component 2, the PCB board 3, and the first mounting bracket 4 are all integrated in the air outlet housing 111, and the air outlet housing 111 is further inserted into the air outlet end of the main body housing 1; the windshield end of the main body housing 1 is inserted with a windshield housing 112, and the windshield housing 112 is fixedly connected to the first mounting bracket 4, thereby making the windshield housing 112 and the air outlet housing 111 fixedly installed at the axial ends of the main body housing 1 and making the heating component 2, the PCB board 3, and the first mounting bracket 4 fixedly installed in the main body housing 1.

[0068] It is worth noting that a ventilation slot should be provided on the air outlet shell 111, which connects the air outlet shell 111 with the handle inner shell 12. The ventilation slot is oriented toward the windshield end and the bottom of the ventilation slot is flush with the end of the handle inner shell 12 close to the air outlet end, so that the cold air flow in the handle inner shell 12 can smoothly enter the air outlet shell 111.

[0069] Furthermore, the first length is slightly smaller than the second length, so that the distance from the connection between the first outer shell 11 and the handle inner shell 12 to the air outlet end is greater than the distance from the connection between the first outer shell 11 and the handle inner shell 12 to the wind shield end, and the time for the airflow to pass through the heating component 2 is increased, which can ensure the heating effect of the heating component 2.

[0070] Further, referring to Figures 3 and 4, the PCB board 3 is relatively located on the side of the second central axis close to the windshield end; there is a gap between the first mounting frame 4 and the PCB board 3 and the heating component 2, and the end of the heating component 2 close to the windshield end is relatively located on the side of the second central axis close to the windshield end.

[0071] In this embodiment, the end of the heating component 2 close to the windshield end is relatively located on the side close to the windshield end on the second central axis, so that the hair dryer of the present invention can retain the axial length of the heating component 2 as much as possible, so that the heating component 2 can heat the airflow faster and better, thereby ensuring the hot air effect of the hair dryer.

[0072] Specifically, the PCB board 3 and the first mounting frame 4 are relatively located on the side of the second central axis close to the windshield end, so that the PCB board 3 and the first mounting frame 4 are close to the windshield end of the main shell 1, and the second central axis divides the internal space of the handle inner shell 12 into upper and lower parts axially. The upper part is close to the windshield end, and the lower part is close to the air outlet end, that is, the PCB board 3 and the first mounting frame 4 are located at the upper part, and the end of the heating component 2 close to the windshield end is relatively located on the side of the second central axis close to the windshield end, that is, the end of the heating component 2 close to the windshield end is located at the upper part, and the other end of the heating component 2 reaches the air outlet end. At this time, the two ends of the heating component 2 are relatively located on both sides of the second central axis. The length of the heating component 2 is greater than half of the axial length of the first shell 11, and the space in the first shell 11 is utilized with maximum efficiency, so that the heating component 2 can heat the airflow for a longer time, ensuring the heating effect of the blower.

[0073] It's worth noting that the PCB board 3 is circular and has at least one flat square on its outer edge along its circumference. The flat square creates a large gap between the PCB board 3 and the inner wall of the air outlet housing 111, allowing airflow from the handle inner housing 12 to the air outlet housing 111 to pass through the flat square and enter the rear side of the PCB board 3. This airflow then flows from the rear side of the PCB board 3 to the front side of the air outlet housing 111 and is blown out from the air outlet, improving the heat dissipation effect of the PCB board 3.

[0074] Further, referring to Figures 5 to 10, the heating component 2 includes a heating wire assembly 21, an annular inner shell 22, an annular outer shell 23 and a second mounting bracket 24. The annular inner shell 22 is provided with a plurality of support members 221 along the first central axis. The heating wire assembly 21 is arranged on each support member 221 around the first central axis. The end of the heating wire assembly 21 close to the windshield end is relatively located on the second central axis; the annular outer shell 23 and the annular inner shell 22 are both arranged on the side of the second mounting bracket 24 close to the air outlet end, and the annular outer shell 23 is coaxially sleeved on the outside of the annular inner shell 22.

[0075] In this embodiment, one end of the annular inner shell 22 is relatively located on the side of the second central axis close to the windshield end, and the end of the heating wire assembly 21 close to the windshield end is relatively located on the second central axis, which not only ensures the axial length of the heating wire assembly 21 and the airflow heating effect, but also reduces the contact time between the airflow and the heating wire assembly 21, thereby improving the airflow heating efficiency.

[0076] Specifically, the end of the heating wire assembly 21, closest to the windshield, is positioned directly in the center of the airflow within the handle inner shell 12. The heating wire assembly 21 includes at least one heating wire in a wavy pattern. The heating wire is wound several times around the axis of the annular inner shell 22, with each coil perpendicular to the outer surface of the annular inner shell 22. A heating zone is formed between two adjacent support members 221, with a portion of the heating wire positioned within the heating zone. The starting end of the heating wire is relatively located on the second central axis. The heating wire is wavy in shape, with the coil within a wavelength being approximately perpendicular to the axis of the annular inner shell 22. In other words, the coil of the heating wire is perpendicular to the outer surface of the annular inner shell 22, increasing the contact area between the airflow and the heating wire, thereby improving the efficiency of the heating wire in heating the airflow. The heating wire assembly 21 preferably includes two heating wires, which are connected in parallel and wound in parallel around each support member 221, with a predetermined spacing between the two heating wires. Compared with a single heating wire, two parallel heating wires with a gap between them have a longer length and a larger area in contact with the airflow, and thus have a higher heating efficiency for the airflow. The annular outer shell 23 is coaxially arranged with the annular inner shell 22, so that the heating wire assembly 21 is relatively located between the annular outer shell 23 and the annular inner shell 22, which can better isolate the heat of the heating wire assembly 21, reduce the temperature on the first outer shell 11, and prevent the first outer shell 11 of the hair dryer from scalding the user or being deformed by high temperature, thereby improving the user experience. Preferably, the annular outer shell 23 is arranged on the inner annular surface of the air outlet shell 111 and is consistent with the shape of the air outlet shell 111. When the annular inner shell 22 is placed inside the windshield shell 112, the annular outer shell 23 is coaxially arranged with the annular inner shell 22. The annular outer shell 23, the annular inner shell 22 and the support member 221 can be made of mica sheets, porous ceramics, ceramic-based thermal insulation materials or high-temperature resistant thermal insulation cotton, or can be made by spraying high-temperature resistant and thermal insulation coatings on the substrate. The first mounting frame 4 is fixedly connected to the heating component 2 and the PCB board 3, so that the heating component 2 and the PCB board 3 are integrated and installed in the air outlet shell 111, which strengthens the connection effect of the heating component 2 and the PCB board 3 and reduces the axial length of the heating component 2 and the PCB board 3 after installation. At the same time, the annular shell 23 is arranged on the inner ring surface of the air outlet shell 111, which further improves the heat insulation effect of the heating component 2, prevents the first shell 11 from scalding the user or being deformed by high temperature, and has a compact layout and high space utilization.

[0077] It is worth noting that each heating wire has several bending sections, and the several bending sections are connected end to end so that the outline of the heating wire is a closed wavy curved ring. It can be understood that by forming a wavy curved ring, the coverage rate of the heating wire in the first cavity is increased, so that the cold air can be heated faster when flowing through the heating wire. By using simple structural deformation, the heating efficiency can be improved, and the space utilization rate is also improved, which has excellent practicality. The end surface of the support member 221 on the side away from the annular inner shell 22 is provided with several limiting teeth, and limiting grooves are formed between adjacent limiting teeth. Several heating wires are respectively arranged in corresponding limiting grooves to prevent the heating wire from deviating. The limiting teeth form several limiting grooves to fix the heating wire. Under the continuous output of hot air or cold air, the heating wire on the annular inner shell 22 can be stuck in the limiting groove at all times and will not be deviated by the wind force, making the overall structure more reliable and practical. In addition, factors such as the number of teeth and tooth width of the limiting teeth should be adjusted according to specific circumstances. For example, the number of teeth can be increased or decreased according to different winding methods of the heating wire, or the tooth width of the limiting teeth can be adjusted to achieve the adjustment of the width of the limiting groove.

[0078] Further, referring to Figures 11 and 12, the end of the handle inner shell 12 close to the first outer shell 11 also has a control part 123, and the control part 123 is recessed along the radial direction of the handle inner shell 12 toward the air outlet end; the control part 123 has a second guide surface 1231 and a third guide surface 1232, the second guide surface 1231 is arranged at the end of the control part 123 close to the first outer shell 11, and the PCB board 3 is flush with the second guide surface 1231 close to the end of the handle inner shell 12; the third guide surface 1232 is arranged at the end of the control part 123 away from the first outer shell 11.

[0079] In this embodiment, the PCB board 3 is flush with the second guide surface 1231 near one end of the handle inner shell 12. The cold air flow in the handle inner shell 12 can reach the surface of the PCB board 3 through the second guide surface 1231 and the third guide surface 1232 of the control part 123, which is beneficial to the heat dissipation of the PCB board 3 and prevents the temperature of the PCB board 3 from being too high, affecting the service life of the PCB board 3.

[0080] Specifically, a control assembly is provided within the control unit 123 for controlling the operation of the hair dryer. The control unit 123 is disposed at one end of the handle inner shell 12 near the windshield end, and the control unit 123 is formed by an inward depression of the handle inner shell 12. The control unit 123 specifically includes a second guide surface 1231, a third guide surface 1232, and a fourth guide surface 1233. The fourth guide surface 1233 is disposed between the second guide surface 1231 and the third guide surface 1232. The fourth guide surface 1233 is along the second central axis. The second guide surface 1231 is close to the first outer shell 11 and extends outward, while the third guide surface 1232 is away from the first outer shell 11 and extends outward. The inclination angle of the second guide surface 1231 is greater than the inclination angle of the third guide surface 1232, so that wind can pass through the control unit 123 smoothly, with large air volume and low noise. At the same time, the PCB board 3 is flush with the second guide surface 1231 near one end of the handle inner shell 12. The cold air flow reaching the first outer shell 11 will flow through the lower surface of the PCB board 3 along the direction of the second central axis. The lower surface of the PCB board 3 is located on the side of the PCB board 3 near the air outlet end. This cold air flow has not been heated by the heating component 2, which is conducive to reducing the temperature of the PCB board 3 and preventing the cold air flow from being heated by the heating component 2 and then passing through the PCB board 3, causing the PCB board 3 to be overheated and damaged. At the same time, the second guide surface 1231 is tilted toward the windshield end, so that the cold air flow of the handle inner shell 12 has an inertia of flowing toward the windshield end. At this time, the cold air flow can not only flow through the lower surface of the PCB board 3, but also partially reach the side of the PCB board 3 near the windshield end. At this time, part of the cold air flow flows through the upper surface of the PCB board 3, which can better remove the heat from the two sides of the PCB board 3 and prevent the components on the PCB board 3 from overheating.

[0081] Further, referring to Figures 12 and 13, a guide member 124 is further provided at one end of the handle inner shell 12 close to the first outer shell 11. The guide member 124 is relatively close to the air outlet end. The guide member 124 has a first guide surface 1241. The first guide surface 1241 and the second guide surface 1231 are directed relative to each other, so that the cold air flow of the handle inner shell 12 can flow toward the PCB board 3 along the direction of the first guide surface 1241 of the guide member 124; a plurality of first through holes 41 are further provided on the first mounting frame 4, so that the air flow flowing through the PCB board 3 can flow along the first central axis through the first through holes 41 to the air outlet end and flow through the heating component 2.

[0082] In this embodiment, a guide member 124 is further provided at one end of the handle inner shell 12 close to the first outer shell 11. The first guide surface 1241 and the second guide surface 1231 of the guide member 124 are oriented relative to each other, which can reduce the cross-sectional area of ​​the air duct at the ventilation slot, thereby increasing the wind speed of the cold air flow through the ventilation slot, increasing the fluidity of the cold air flow, and not easily causing accumulation, so that the cold air flow flows to the front and rear sides of the PCB board 3, and the cold air flow gathers around the PCB board 3, further enhancing the heat dissipation effect of the PCB board 3.

[0083] Specifically, the control unit 123 and the guide member 124 are respectively arranged on both sides of the second central axis. The first guide surface 1241 of the guide member 124 faces the windshield end. The first guide surface 1241 gradually rises along the airflow direction, that is, the thickness of the guide member 124 along the first central axis gradually increases. The guide member 124 gets closer and closer to the control unit 123, and the cross-sectional area of ​​the air duct at the ventilation slot gradually decreases. The first guide surface 1241 is close to the first housing 11 and covers part of the ventilation slot, so that a small part of the heating wire assembly 21 is located in the flow direction of the cold air flow, while most of the heating wire assembly 21 is blocked by the guide member 124. At this time, the cold air flow preferentially flows along the direction of the first guide surface 1241 of the guide member 124 toward the windshield end and flows through the PCB board 3, and then flows along the first central axis through the heating component 2. Furthermore, the guide member 124 reduces the cross-sectional area of ​​the air duct at the ventilation slot, increasing the wind pressure of the cold air at that location while maintaining the force of the air supply assembly 5. This can improve the wind speed and fluidity of the cold air flow through the ventilation slot, making the air volume more uniform during heating and air discharge. In this embodiment, the three coils of heating wire assembly 21 are located on the side of the first guide surface 1241 close to the windshield end, and the rest are blocked by the guide member 124. The first mounting frame 4 is also provided with a plurality of first through holes 41, so that the first mounting frame 4 forms a hollow structure. The first through holes 41 are used for the circulation of air between the heating assembly 2 and the PCB board 3, so that the heat generated by the components on the PCB board 3 can be carried away by the air flow through the first through holes 41, thereby preventing the components from overheating and affecting their normal operation. At the same time, the first through holes 41 also increase the flow rate of the air between the heating assembly 2 and the PCB board 3, thereby increasing the air volume and fluidity of the air flow.

[0084] It is worth noting that the inclination angle of the first guide surface 1241 is between 0-45°, which can ensure smooth airflow while ensuring low noise. The guide member 124 is also provided with a fifth guide surface 1242 at the end away from the first shell 11. The slope of the fifth guide surface 1242 is greater than the slope of the first guide surface 1241. When the airflow passes through the fifth guide surface 1242, the angle at which the flow direction changes is greater than that of the first guide surface 1241, so that the airflow can be better guided to the PCB board 3 in the main shell 1, and it can also reduce noise and improve the user experience. The length of the fifth guide surface 1242 is smaller than that of the first guide surface 1241, which improves the stability of the guiding effect. The inclination angle of the fifth guide surface 1242 is between 0-60°, and the guiding effect is good. The guide member 124 is not limited to this, and can also be a guide block, a guide strip or a guide tube, etc., as long as it meets the needs.

[0085] Furthermore, the handle inner shell 12 is provided with a first plug-in portion 1211, and the flow guide 124 is provided with a first slot 1243. During installation, the flow guide 124 is simply inserted upward through the first slot 1243 into the first plug-in portion 1211, making installation and removal convenient and structurally simple. To ensure a secure connection between the handle inner shell 12 and the flow guide 124, the handle inner shell 12 and the flow guide 124 can be tightened with screws. It is worth noting that this application does not further define the connection structure between the flow guide 124 and the handle inner shell 12; as long as the flow guide 124 meets the flow diversion requirements, it is within the scope of protection of this application.

[0086] Further, referring to Figure 4, the support member 221 is symmetrical along the second central axis, and a support member 221 close to the handle inner shell 12 is arranged along the second central axis, so that the airflow passing through this support member 221 is split and flows symmetrically to both sides of the heating component.

[0087] In this embodiment, a support member 221 close to the handle inner shell 12 is arranged along the second central axis, so that the airflow passing through this support member 221 is split and flows symmetrically to the two sides of the heating component 2. The airflow on both sides of the heating component 2 is more uniform, thereby making the air outlet and heating effect stable and reliable.

[0088] Specifically, a plurality of support members 221 are symmetrically distributed along the radial direction of the annular inner shell 22, and the enclosed area formed between the annular outer shell 23 and the annular inner shell 22 is evenly divided into a plurality of heating zones by the plurality of support members 221, so that the gas can circulate between the two and the heating efficiency is improved. The number of support members 221 can be adjusted according to the size of the annular inner shell 22 or the required heating effect. In this embodiment, a support member 221 close to the handle inner shell 12 is arranged along the second central axis. The cold air flow in the handle inner shell 12 is evenly divided into two air flows by this support member 221. These two air flows flow along the inner annular surface of the annular outer shell 23, so that the air flow on both sides of this support member 221 is roughly the same, the air flow on both sides of the heating component 2 is more uniform, and the hot air flow after the heating component 2 is heated is also more uniform and smooth, and the air outlet and heating effect are more stable and reliable. Preferably, there are twelve support members 221, and the twelve support members 221 are evenly spaced around the annular inner shell 22 and divide the annular inner shell 22 into twelve equal parts, thereby forming twelve heating zones. The spacing between each heating zone is consistent, which largely ensures airflow uniformity. In other embodiments, the number of support members 221 can also be adjusted to increase or decrease the number of heating zones. It is worth noting that this application does not limit the specific number of support members 221, which includes but is not limited to twelve. As long as a support member 221 close to the handle inner shell 12 is arranged along the second central axis and can achieve the effect of uniform airflow diversion, it is within the scope of protection of this application.

[0089] Further, referring to Figures 7 and 8, the annular inner shell 22 is sleeved on one side of the second mounting bracket 24 close to the air outlet end. The second mounting bracket 24 is further provided with a fixing groove 241 at a corresponding position of the support member 221, and the support member 221 is snap-fitted into the fixing groove 241.

[0090] In this embodiment, the annular inner shell 22 is sleeved on the second mounting frame 24, and the support member 221 is inserted into the fixing groove 241, so that the annular inner shell 22 and the support member 221 are firmly fixed on the second mounting frame 24, which can facilitate the fixed connection between the heating component 2 and the first mounting frame 4; at the same time, this fixing method can effectively reduce the axial length of the heating component 2.

[0091] Specifically, the fixing groove 241 is arranged along the axis of the second mounting frame 24. The position of the fixing groove 241 corresponds to the position of the support member 221. The opening of the fixing groove 241 faces the air outlet end. The annular inner shell 22 can be respectively inserted into the outer annular surface of the second mounting frame 24 along the first central axis. Because the annular inner shell 22 is inserted into the outer annular surface of the second mounting frame 24, the annular inner shell 22 and the second mounting frame 24 at least partially overlap, reducing the axial length of the heating component 2. At this time, the support member 221 is properly inserted into the fixing groove 241, providing support for the support member 221 and strengthening the connection strength between the annular inner shell 22 and the second mounting frame 24, thereby preventing the annular inner shell 22 and the second mounting frame 24 from separating. Preferably, the annular inner shell 22 is further provided with a plurality of positioning grooves, and the positioning grooves are arranged in a one-to-one correspondence with the support members 221; each support member 221 is provided with a positioning clip that matches the corresponding positioning groove, and the positioning clip can be snapped into the corresponding positioning groove, thereby fixing the support member 221 to the annular inner shell 22. The coordinated use of the positioning grooves and the positioning clips can ensure the stability of the support member 221, while ensuring the precise positioning of the support member 221, facilitating the installation of the support member 221, and also preventing the support member 221 from deflecting or sliding when the operator installs the heating wire onto the support member 221.

[0092] Further, referring to Figures 9 and 10, a first fastener 42 and a first fixing structure 43 are provided at one end of the first mounting bracket 4, the first fastener 42 fastens the four edges of the PCB board 3, and the first fixing structure 43 passes through the PCB board 3 and is fixedly connected to the windshield shell 112; a second fastener 44 and a second fixing structure 45 are provided at the other end of the first mounting bracket 4, the second fastener 44 fastens the second mounting bracket 24, and the second fixing structure 45 is fixedly connected to the second mounting bracket 24.

[0093] In this embodiment, the first mounting frame 4 is fixedly connected to the PCB board 3 through the first fastener 42, the first fixing structure 43; the first mounting frame 4 is fixedly connected to the second mounting frame 24 through the second fastener 44, the second fixing structure 45, so that the PCB board 3 and the heating component 2 are fixedly installed in the air outlet shell 111, strengthening the connection strength of the PCB board 3 and the heating component 2, preventing the position of the PCB board 3 and the heating component 2 from changing, and also improving the installation efficiency of the PCB board 3 and the heating component 2.

[0094] Specifically, there are at least two first fasteners 42, two first fasteners 42 are arranged on the side of the mounting plate close to the PCB board 3, and the two first fasteners 42 are respectively located on both sides of the outer edge of the first mounting frame 4. The first fasteners 42 are suitable for fastening the PCB board 3, and can support and fix the PCB board 3. By fastening the PCB board 3 with at least two first fasteners 42, the PCB board 3 is restricted from moving away from the first mounting frame 4, and the outer edge of the PCB board 3 is prevented from vibrating significantly under the action of high-speed airflow, thereby avoiding cracks or even damage to the PCB board 3, and also avoiding damage to the connection between the PCB board 3 and the heating component 2. In addition, fixing the PCB board 3 by the first fasteners 42 can improve the efficiency of installation and disassembly. The first fixing structure 43 includes at least two first mounting posts, which are dispersedly arranged on the side of the first mounting frame 4 close to the PCB board 3. The PCB board 3 is provided with mounting holes suitable for the first mounting posts to pass through. The first mounting posts pass through the mounting holes of the PCB board 3 and are fixedly connected to the windshield shell 112. The dispersed arrangement of the first mounting posts prevents relative rotation between the PCB board 3 and the first mounting bracket 4, thereby preventing damage to the connection between the PCB board 3 and the heating component 2. Furthermore, the multiple first mounting posts guide the installation of the PCB board 3, preventing incorrect installation of the PCB board 3 and improving the installation efficiency of the PCB board 32. A second support portion 242 is also provided in the middle of the side of the second mounting bracket 24 near the windshield end. The second support portion 242 is used to limit the distance between the first mounting bracket 4 and the second mounting bracket 24, preventing the heating component 2 from getting too close to the first mounting bracket 4 and damaging the first mounting bracket 4. A first support portion 46 is also provided at a corresponding position on the first mounting bracket 4. Several third support portions are provided along the circumference of the second mounting bracket at the end of the second mounting bracket connected to the first mounting bracket 4. The third support portions are used to support the PCB board 3. Both the first support portion 46 and the third support portions are used to control the distance between the first mounting bracket 4 and the PCB board 3, preventing the first mounting bracket 4 from getting too close to the PCB board 3 and affecting heat dissipation, and preventing the first mounting bracket 4 from squeezing components on the PCB board 3. The first support portion 46 has a first insertion hole, and the second support plate has a second insertion hole. A hook is provided on the second mounting frame 24, and a slot is provided on the first supporting portion 46 of the first mounting frame 4. The hook and the slot are engaged so that the second fastener 44 fastens the second supporting portion 242 and the first supporting portion 46. The second fixing structure 45 includes a plurality of second mounting posts and countersunk holes. The second mounting posts are arranged on a side of the second mounting frame 24 close to the first mounting frame 4. The first mounting frame 4 is provided with countersunk holes at corresponding positions of the second mounting posts. The second mounting posts and the countersunk holes are fixedly connected by screws, so that the second mounting frame 24 and the first mounting frame 4 are fixedly connected. The arrangement of the countersunk holes ensures that the screws in the countersunk holes will not protrude from the board surface of the first mounting frame 4 and will not affect the components on the PCB board 3. The second mounting frame 24 is located exactly in the gap between the second mounting frame 24 and the first mounting frame 4, and will not increase the axial length of the heating component 2.

[0095] It is worth noting that the first mounting frame 4 is also provided with a plurality of first through-holes, each of which is provided with reinforcing ribs arranged radially, thereby enhancing the overall strength of the first mounting frame 4. The reinforcing ribs include outer ribs and inner ribs. One end of the inner rib is connected to the outer edge of the first mounting frame 4, and the other end extends away from the first mounting frame 4. The inner ribs are arranged radially, and the outer ribs are sequentially connected to the end of the inner ribs away from the first mounting frame 4. By providing the outer ribs and inner ribs, and arranging the inner ribs radially, the smoothness of the hot air flow from the components on the PCB board through the first through-holes 41 can be improved, while ensuring the overall strength of the first mounting frame 4. The first and second fasteners 42, 44 include, but are not limited to, hooks, slots, and other fastener structures. The first and second fixing structures 43, 45 include, but are not limited to, mounting posts, screws, and other fixing structures.

[0096] Further, referring to Figure 7, a thermistor 125 and a thermostat 126 are also provided at one end of the annular inner shell 22 close to the air outlet end. The thermistor 125 and the thermostat 126 are symmetrical relative to the direction of the first central axis. The thermistor 125 and the thermostat 126 are relatively located in the middle of the left and right sides of the outer ring surface of the annular inner shell 22.

[0097] In this embodiment, the thermistor 125 and the thermostat 126 are symmetrical along the first central axis, resulting in a more rational spatial layout. Furthermore, the thermistor 125 and the thermostat 126 are relatively far apart, enabling a wider range of monitoring of the temperature of the hot air passing through the heating wire assembly 21. Furthermore, the annular inner shell 22 is evenly divided into two sections by a plurality of support members 221. The thermistor 125 and the thermostat 126 are relatively positioned in the middle of the left and right sides of the outer annular surface of the annular inner shell 22, precisely at the two highest temperature points within the annular outer shell 23. This allows the thermistor 125 and the thermostat 126 to timely and accurately monitor the temperature of the hot air passing through the heating wire assembly 21.

[0098] Specifically, the annular inner shell 22 has a second groove at one end near the air outlet. The thermostat 126 is mounted in the second groove and positioned relative to the outer surface of the annular inner shell 22. The thermostat 126 is separated from the heating wire assembly 21 and positioned relatively close to the air outlet of the main body shell 1, enabling sampling and monitoring of the hot air passing through the heating wire assembly 21. A first groove is also provided at one end near the air outlet of the annular inner shell 22. The connector of the thermistor 125 passes through the first groove and connects to the PCB 3 from within the annular inner shell 22, effectively protecting the connector. The first and second grooves are positioned symmetrically along the first central axis, centered on the left and right sides of the outer surface of the annular inner shell 22. A fuse is also provided on the inner surface of the annular inner shell 22, positioned along the first central axis. A third groove is also formed through the annular inner shell 22 at the corresponding position of the fuse. The third groove mates with the fuse and is positioned relative to the inner side of the annular inner shell 22. A fuse is also provided on the inner ring surface of the annular inner shell 22. The fuse will melt if it is overloaded, thereby preventing the heating wire assembly 21 from continuing to be at high temperature and avoiding serious damage caused by the hair dryer; at the same time, there is a third groove on the annular inner shell 22 that matches the fuse, so that the fuse has a good working scenario and will neither melt prematurely nor delay melting.

[0099] It is worth noting that in this embodiment, twelve support members 221 are evenly spaced around the annular inner shell 22 and divide the annular inner shell 22 into twelve equal parts. The support members 221 on the left and right sides of the outer ring surface of the annular inner shell 22 are parallel to each other, the thermistor 125 is located above this support member 221, and the temperature controller 126 is located below this support member 221; or the temperature controller 126 is located above this support member 221, and the thermistor 125 is located below this support member 221.

[0100] Further, referring to Figure 10, a capacitor 31 is provided in the middle of one end of the PCB board 3 close to the air outlet end. The capacitor 31 passes through the first mounting bracket 4 and the second mounting bracket 24 to reach the inside of the annular inner shell 22, and the capacitor 31 does not exceed the annular inner shell 22.

[0101] In this embodiment, the capacitor 31 is arranged in the middle of one end of the PCB board 3 close to the air outlet end. The capacitor 31 passes through the first mounting bracket 4 and the second mounting bracket 24 to reach the inside of the annular inner shell 22, which can effectively avoid the problem of accommodating the large capacitor 31 and reduce the axial length of the main shell 1; at the same time, the capacitor 31 is relatively located in the middle of the annular inner shell 22 and does not exceed the annular inner shell 22, which can effectively protect the capacitor 31 from being damaged by high temperature.

[0102] Specifically, the capacitor 31 at least partially overlaps with the heating component 2, thereby reducing the distance between the PCB board 3 and the heating component 2, and further reducing the space occupied by the PCB board 3 and the heating component 2 in the axial direction of the main shell 1, so that the main shell 1 can be thinner, meeting the compact requirements and the user's usage needs. The capacitor 31 is located on the inner side of the annular inner shell 22. The annular inner shell 22 can effectively reduce the heat transfer of the heating wire assembly 21 to the inner side of the annular inner shell 22, avoiding the capacitor 31 from being in an overheating environment. At the same time, the overall structure is simple and easy to install. A second support portion 242 is also provided in the middle of the side of the second mounting frame 24 close to the windshield end. The second support plate has a second socket. A first support portion 46 is also provided at the corresponding position of the first mounting frame 4. The first support portion 46 has a first socket. The capacitor 31 passes through the first socket and the second socket to reach the inside of the annular inner shell 22. At the same time, the first support portion 46 can leave a gap between the first mounting frame 4 and the PCB board 3; the second support portion 242 leaves a gap between the first mounting frame 4 and the second mounting frame 24, preventing the PCB board 3 from being too close to the heating component 2, which would cause the PCB board 3 to overheat and be damaged, or even fail to dissipate the heat of the components on the PCB board 3, causing the PCB board 3 to spontaneously combust. At the same time, the capacitor 31 passes through the first and second jacks, the second support portion 242 and the first support portion 46 abut against each other, the first support portion 46 abuts against the PCB board 3, and the second support portion 242 and the first support portion 46 are arranged on the outside of the capacitor 31, which can effectively protect the capacitor 31 and prevent it from being subjected to excess heat. During the installation process, the second support portion 242 and the first support portion 46 have a certain installation guide, which facilitates the insertion of the capacitor 31 into the first mounting frame 4 and the second mounting frame 24.

[0103] Further, referring to Figures 2 and 14, the handle inner shell 12 includes a first inner shell 121 and a second inner shell 122. The first inner shell 121 is provided with an annular connecting portion at one end close to the first outer shell 11, and the annular connecting portion fixes the middle part of the first outer shell 11; the second outer shell 6 is engaged with the first outer shell 11 along the direction of the first central axis, and the first outer shell 11 is close to the air outlet end.

[0104] In this embodiment, the first inner shell 121 and the second inner shell 122 are snapped together to form the handle inner shell 12, which is simple and quick to assemble; the first inner shell 121 is provided with an annular connecting portion fixedly connected to the first outer shell 11, which greatly enhances the connection strength between the handle inner shell 12 and the first outer shell 11.

[0105] Specifically, a control part 123 is provided on the side of the first shell 11 close to the wind shield end, a first plug-in part 1211 is provided on the side of the annular connecting part close to the wind outlet end, and a flow guide 124 is plugged into the first plug-in part 1211; an air supply component 5 is also provided inside the first shell 11.

[0106] It is worth noting that the air supply component 5 includes but is not limited to a fan, an air pump, etc., and this application does not make further limitations.

[0107] Furthermore, referring to Figures 1 and 14, it also includes a second shell 6, which is sleeved on the handle inner shell 12 along the second central axis direction. The second shell 6 is also provided with a cover shell 61 and an inner filter frame 62 at one end away from the first shell 11. The inner filter frame 62 is clamped on the first shell 11, and the cover shell 61 can be detachably sleeved on the inner filter frame 62 through a magnetic structure.

[0108] In this embodiment, the second outer shell 6 is sleeved on the handle inner shell 12 along the second central axis, which can effectively prevent the control components and air supply assembly 5 inside the handle inner shell 12 from being damaged; at the same time, the second outer shell 6 is also provided with a cover shell 61 and an inner filter frame 62 at the end away from the first outer shell 11. The inner filter on the inner filter frame 62 can prevent foreign matter from entering the handle inner shell 12. The cover shell 61 can be detachably sleeved on the inner filter frame 62 through a magnetic structure, which is convenient for installation and disassembly, and it is convenient to remove the cover shell 61 to clean the interior.

[0109] Specifically, an air inlet is provided on the cover 61, and the external air flow can enter the handle inner shell 12 through the air inlet and the mesh of the inner filter in turn. A first through-hole for passing the wire tube is provided on the inner filter frame 62, and a second through-hole for passing the wire tube is provided on the cover 61. The inner filter frame 62 includes an upper end ring, a lower end plate, and an intermediate rib connecting the upper end ring and the lower end plate; the upper end ring is detachably connected to the lower end of the second outer shell 6 through a connecting structure, a first through-hole is provided on the lower end plate, the inner filter is connected to the intermediate rib, and is located between the upper end ring and the lower end plate; the cover 61 includes a cover wall and a cover top, the cover wall is provided with an air inlet, and the cover top is detachably connected to the lower end plate through a magnetic structure.

[0110] It is worth noting that the inner filter and the inner filter frame 62 are both cylindrical. The second housing 6 is provided with a sliding hole and a button hole used by the control unit 123, which facilitates the control elements on the handle inner housing 12 to be controlled on the second housing 6.

[0111] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A hair dryer, characterized in that: include: A main body shell, the main body shell comprises a first outer shell and a handle inner shell, the outer side wall of the first outer shell is provided with a connecting end surface, and the handle inner shell is connected to the first outer shell through the connecting end surface; The first housing has a first central axis, and two ends of the first housing at the first central axis are respectively an air outlet end and a wind shielding end; The two ends of the connecting end surface in the direction of the first central axis are respectively a first end and a second end, and the distance between the air outlet end and the wind shielding end is no more than twice the distance between the first end and the second end.

2. A hair dryer according to claim 1, characterized in that: The connecting end surface is located relative to the first outer shell in the middle position of the first central axis, the handle inner shell has a second central axis perpendicular to the first central axis, the first end is close to the air outlet end, the second end is close to the wind shielding end, the distance between the first end and the air outlet end does not exceed the radius of the connecting end surface, and the distance between the second end and the wind shielding end does not exceed the radius of the connecting end surface.

3. A hair dryer according to claim 2, characterized in that: The air outlet end is provided with an air outlet housing, and a heating component, a PCB board and a first mounting frame are arranged in the air outlet housing, the first mounting frame is arranged between the heating component and the PCB board, the first mounting frame is fixedly connected to the heating component and the PCB board, and the heating component is close to the air outlet end; The windshield end is provided with a windshield shell, and the windshield shell is fixedly connected to the first mounting frame.

4. A hair dryer according to claim 3, characterized in that: The PCB board is relatively located on a side of the second central axis close to the wind shielding end; Gaps are left between the first mounting frame and the PCB board and the heating component, and one end of the heating component is relatively located on a side of the second central axis close to the wind shielding end.

5. A hair dryer according to claim 4, characterized in that: The handle inner shell has a control portion at one end close to the first outer shell, and the control portion is recessed toward the air outlet end along the radial direction of the handle inner shell; The control part has a second guide surface and a third guide surface, the second guide surface is arranged at one end of the control part close to the first shell, and the PCB board is flush with one end of the second guide surface close to the handle inner shell; The third guide surface is disposed at an end of the control portion away from the first shell.

6. A hair dryer according to claim 5, characterized in that: An end of the handle inner shell close to the first outer shell is further provided with a guide member, the guide member is relatively close to the air outlet end, the guide member has a first guide surface, the first guide surface and the second guide surface are directed oppositely, so that the cold air flow of the handle inner shell can flow toward the PCB board along the direction of the first guide surface of the guide member; The first mounting frame is also provided with a plurality of first through holes, so that the airflow flowing through the PCB board can flow through the first through holes along the first central axis to the air outlet end and flow through the heat generating component.

7. A hair dryer according to claim 3, characterized in that: The heating assembly comprises a heating wire assembly, an annular inner shell, an annular outer shell and a second mounting frame, wherein the annular inner shell is provided with a plurality of supporting members around the first central axis, the heating wire assembly is provided around the first central axis on each of the supporting members, and an end of the heating wire assembly close to the windshield end is relatively located on the second central axis; The annular outer shell and the annular inner shell are both arranged on a side of the second mounting frame close to the air outlet end, and the annular outer shell is coaxially sleeved on the outer side of the annular inner shell.

8. A hair dryer according to claim 7, characterized in that: The support member is symmetrical along the second central axis, and a support member close to the handle inner shell is arranged along the second central axis, so that the airflow passing through the support frame is split and flows symmetrically to both sides of the heating component.

9. A hair dryer according to claim 7, characterized in that: The annular inner shell is sleeved on one side of the second mounting frame close to the air outlet end. The second mounting frame is further provided with a fixing groove at a corresponding position of the support member, and the support member is clamped in the fixing groove.

10. A hair dryer according to claim 7, characterized in that: A first fastener and a first fixing structure are provided at one end of the first mounting frame, the first fastener fastens the edges of the PCB board, and the first fixing structure passes through the PCB board and is fixedly connected to the windshield shell; A second fastener and a second fixing structure are provided at the other end of the first mounting frame, the second fastener fastens the second mounting frame, and the second fixing structure is fixedly connected to the second mounting frame.

11. A hair dryer according to claim 7, characterized in that: A thermistor and a thermostat are also provided at one end of the annular inner shell close to the air outlet end. The thermistor and the thermostat are symmetrical relative to the first central axis direction. The thermistor and the thermostat are relatively located in the middle of the left and right sides of the outer ring surface of the annular inner shell.

12. A hair dryer according to claim 7, characterized in that: A capacitor is also provided in the middle of one end of the PCB board close to the air outlet end. The capacitor passes through the first mounting frame and the second mounting frame to reach the inside of the annular inner shell, and the capacitor does not exceed the annular inner shell.

13. A hair dryer according to claim 1, characterized in that: The handle inner shell comprises a first inner shell and a second inner shell, and an annular connecting portion is provided at one end of the first inner shell close to the first outer shell, and the annular connecting portion fixes the middle part of the first outer shell; The second shell is engaged with the first shell along the first central axis and the first shell is close to the air outlet.

14. A hair dryer according to claim 13, characterized in that: A control part is provided on a side of the first housing close to the wind shielding end, a first plug-in part is provided on a side of the annular connecting part close to the wind outlet end, and a flow guide is plugged into the first plug-in part; An air supply component is also provided inside the first shell.

15. A hair dryer according to claim 14, characterized in that: It also includes a second outer shell, which is sleeved on the handle inner shell along the second central axis direction. A cover shell and an inner filter frame are further provided at one end of the second shell away from the first shell. The inner filter frame is clamped on the first shell, and the cover shell is detachably mounted on the inner filter frame through a magnetic attraction structure.

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