dryer

Abstract

The present invention relates to the field of hair dryers and provides a hair dryer. The hair dryer includes a main body housing which includes a first outer housing and a handle inner housing. The first outer housing has a first central axis, and the axial ends of the first outer housing are an outlet end and a windbreak end, respectively, and the distance between the outlet end and the windbreak end is smaller than a preset distance. The handle inner housing is connected to the axial middle of the first outer housing and has a second central axis, and the first central axis and the second central axis form a preset angle. In the hair dryer of the present invention, the distance between the axial ends of the first outer housing is smaller than a preset distance, and in this case, the main body housing of the hair dryer can satisfy the design requirements of having a small axial length and a small volume, and has an excellent user experience.

Description

Technical Field

[0001] The present invention relates to the field of dryers, and more particularly to dryers.

Background Art

[0002] A dryer consists of a main body and a handle. A blade and a motor are provided inside the handle, and a heating assembly, a PCB board, and a mounting frame are provided inside the main body. However, due to the thickness of the electronic components on the PCB board, the axial length of the heating assembly, and the mounting position of the mounting frame, the space inside the main body is very limited. Many dryers often increase the axial length of the main body to meet the requirements of the length of the heating assembly and the thickness of the PCB board. As a result, the length of the main body is too large, and it cannot meet the needs of miniaturization and the user experience.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In view of the above technical problems, an object of the present invention is to provide a dryer in which the distance between the two axial ends of the first outer housing is smaller than a preset distance. At this time, the main body housing of the dryer can meet the design requirements of a small axial length and a small volume, and has an excellent user experience.

Means for Solving the Problems

[0004] To achieve the above object, the present invention provides a dryer including a main body housing including a first outer housing and a handle inner housing. The first outer housing has a first central axis, and both axial ends of the first outer housing are a blowing end and a wind shielding end respectively. The distance between the blowing end and the wind shielding end is smaller than a preset distance. The handle inner housing is connected to the middle part in the axial direction of the first outer housing. The handle inner housing has a second central axis, and the first central axis and the second central axis form a preset angle. In some embodiments, the diameter length of the handle inner housing is less than or equal to the axial length of the first outer housing, the distance from the connection point between the first outer housing and the handle inner housing to the outlet end is smaller than the radius of the handle inner housing, and the distance from the connection point between the first outer housing and the handle inner housing to the windbreak end is smaller than the radius of the handle inner housing.

[0005] In some embodiments, a discharge housing is provided at the discharge end, and a heating assembly, a PCB substrate, and a first mounting frame are provided inside the discharge housing, the first mounting frame is provided between the heating assembly and the PCB substrate, and the heating assembly is fixedly connected to the PCB substrate, and the heating assembly is close to the discharge end. A windbreak housing is provided at the windbreak end, and the windbreak housing is fixedly connected to the first mounting frame.

[0006] In some embodiments, the PCB substrate is located on the side of the second central axis that is closer to the windbreak end. There are gaps between the first mounting frame and the PCB substrate, and between the first mounting frame and the heating assembly, and one end of the heating assembly is located on the side of the second central axis that is closer to the windbreak end.

[0007] In some embodiments, the end of the handle inner housing adjacent to the first outer housing further comprises a control unit, the control unit being recessed radially toward the outlet end side of the handle inner housing. The control unit has a second guide surface and a third guide surface, the second guide surface is provided at the end of the control unit adjacent to the first outer housing, and the PCB substrate is flush with the end of the second guide surface adjacent to the handle inner housing. The third guide surface is provided at the end of the control unit that is separated from the first outer housing.

[0008] In some embodiments, a guide member is further provided at the end of the handle inner housing adjacent to the first outer housing, the guide member is adjacent to the outlet end and has a first guide surface, and the first guide surface and the second guide surface face each other and guide so that the cold airflow of the handle inner housing can flow to the PCB substrate along the direction of the first guide surface of the guide member. By providing a plurality of first through-holes in the first mounting frame, the airflow flowing over the PCB substrate flows along the direction of the first central axis through the first through-holes to the outlet end and then flows over the heat-generating assembly.

[0009] In some embodiments, the heating assembly includes a heating wire assembly, an annular inner housing, an annular outer housing, and a second mounting frame, wherein the annular inner housing has a plurality of support members arranged circumferentially along the direction of the first central axis, the heating wire assembly is arranged circumferentially around each of the support members around the direction of the first central axis, and the end of the heating wire assembly adjacent to the windbreak end is located relative to the second central axis. Both the annular outer housing and the annular inner housing are provided on the side of the second mounting frame that is close to the outlet end, and the annular outer housing is coaxially fitted to the outside of the annular inner housing.

[0010] In some embodiments, the support members are symmetrical along the second central axis, and one of the support members adjacent to the handle inner housing is provided along the direction of the second central axis, so that the airflow passing through this support member splits and flows symmetrically to both sides of the heating assembly.

[0011] In some embodiments, the annular inner housing is fitted to the side of the second mounting frame adjacent to the outlet end, and a fixing groove is further provided at the position of the second mounting frame corresponding to the support member, and the support member is engaged within the fixing groove.

[0012] In some embodiments, one end of the first mounting frame is provided with a first locking member and a first fixing structure, the first locking member is locked to the peripheral edge of the PCB substrate, and the first fixing structure is fixedly connected to the windbreak housing by penetrating the PCB substrate. A second locking member and a second fixing structure are provided at the other end of the first mounting frame. The second locking member is locked to the second mounting frame, and the second fixing structure is fixedly connected to the second mounting frame.

[0013] In some embodiments, a thermistor and a thermostat are further provided at the end of the annular inner housing adjacent to the outlet end, the thermistor and the thermostat are symmetrical with respect to the direction of 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 housing.

[0014] In some embodiments, a capacitor is further provided midway along the edge of the PCB substrate adjacent to the blowout end, the capacitor passing through the first mounting frame and the second mounting frame to reach the interior of the annular inner housing and not protruding from the annular inner housing.

[0015] In some embodiments, the handle inner housing includes a first inner housing and a second inner housing, wherein an annular connecting portion is provided at the end of the first inner housing adjacent to the first outer housing, and the annular connecting portion fixes the middle portion of the first outer housing. The second outer housing engages with the first outer housing along the direction of the first central axis, and the first outer housing is close to the outlet end.

[0016] In some embodiments, a control unit is provided on the side of the first outer housing adjacent to the wind-shielding end, a first insertion portion is provided on the side of the annular connection portion adjacent to the discharge end, and a guide member is inserted into the first insertion portion. A blower assembly is further provided inside the first outer housing.

[0017] In some embodiments, a second outer housing is further included, fitted into the handle inner housing along the direction of the second central axis, A cover and an inner filter holder are further provided at the end of the second outer housing that is separated from the first outer housing, the inner filter holder is locked to the first outer housing, and the cover is removably fitted onto the inner filter holder by a magnetic attraction structure. [Effects of the Invention]

[0018] Compared to conventional technology, the hair dryer according to the present invention has the following beneficial effects.

[0019] 1. The distance between the axial ends of the first outer housing is smaller than a predetermined distance. In this case, the main housing of the dryer can satisfy the design requirements of having a small axial length and small volume, resulting in an excellent user experience.

[0020] 2. The distance from the connection point between the handle inner housing and the first outer housing to the outlet end and the windbreak end is less than or equal to the radius of the handle inner housing. As a result, the axial length of the main housing is less than or equal to twice the diameter of the handle inner housing. In this case, the axial length of the main housing does not exceed twice the diameter of the handle inner housing, and the first outer housing has the design characteristics of having a small axial length and a small volume.

[0021] 3. By having the end close to the wind shielding end of the heating assembly located relatively closer to the side of the wind shielding end of the second central axis, the dryer of the present invention can maintain the axial length of the heating assembly as long as possible. Thereby, the heating assembly can heat the airflow faster and better, and furthermore, the hot air effect of the dryer is ensured.

[0022] 4. By having the PCB substrate flush with the end close to the handle inner housing of the second guiding surface, the cold airflow in the handle inner housing can be guided by the second guiding surface and the third guiding surface of the control unit to reach the surface of the PCB substrate. This is advantageous for the heat dissipation of the PCB substrate and prevents the temperature of the PCB substrate from being too high and affecting the service life of the PCB substrate.

[0023] 5. A guiding member is further provided at the end of the handle inner housing close to the first outer housing. By having the first guiding surface and the second guiding surface of the guiding member guide in an opposing manner, the cross-sectional area of the air passage in the ventilation groove decreases. Furthermore, the airspeed of the cold airflow passing through the ventilation groove increases, the fluidity of the cold airflow improves, stagnation is less likely to occur, the cold airflow flows to the front and rear sides of the PCB substrate and concentrates around the PCB substrate. Furthermore, the heat dissipation effect of the PCB substrate is enhanced.

[0024] 6. By providing one supporting member along the direction of the second central axis close to the handle inner housing, the airflow passing through this supporting member is divided and symmetrically flows to both sides of the heating assembly, making the airflow on both sides of the heating assembly more uniform. Furthermore, the blowing and heating effects have stability and reliability.

[0025] 7. By fitting the annular inner housing into the second mounting frame and inserting the supporting member into the fixing groove, the annular inner housing and the supporting member are firmly fixed and attached to the second mounting frame. Thereby, it is possible to facilitate the fixed connection between the heating assembly and the first mounting frame. Also, by using this fixing method, the axial length of the heating assembly can be effectively reduced.

[0026] 8. The spatial layout is more rational because the thermistor and thermostat are symmetrical with respect to each other along the direction of the first central axis, and the relative separation of the thermistor and thermostat allows for monitoring of the temperature of the hot air passing through the heating wire assembly over a wider range. Furthermore, because the support members uniformly divide the annular inner housing, and the thermistor and thermostat are located relatively in the middle of the left and right sides of the outer ring surface of the annular inner housing, precisely at the two points with the highest temperature within the annular outer housing, the thermistor and thermostat can monitor the temperature of the hot air passing through the heating wire assembly in a timely and accurate manner. [Brief explanation of the drawing]

[0027] The following describes preferred embodiments with reference to the drawings in a clear and easy-to-understand manner, further explaining the above-mentioned characteristics, technical features and advantages of the present invention, as well as its implementations.

[0028] [Figure 1] This is an overall view of the hair dryer. [Figure 2] This is a side view of the main housing. [Figure 3] This is a cross-section of a hair dryer. [Figure 4] This is a diagram showing the location of the PCB substrate. [Figure 5] This is a diagram showing the exploded view of a hair dryer. [Figure 6] This is a structural diagram of the air outlet housing. [Figure 7] Structural diagram of the heat-generating assembly. [Figure 8] This is a diagram showing the installation of the annular inner housing. [Figure 9] This is a structural diagram of the first mounting frame. [Figure 10] This is a diagram showing the connection between the heat-generating assembly and the PCB board. [Figure 11] This is a diagram showing the positions of the guide member and the control unit. [Figure 12] This is a structural diagram of the control unit. [Figure 13]This is a structural diagram of the guide member. [Figure 14] This is a diagram showing the positions of the cover and inner filter holder. [Modes for carrying out the invention]

[0029] To more clearly illustrate embodiments of the present invention or technical means in the prior art, specific embodiments of the present invention will be described below with reference to the drawings. Clearly, the drawings in the following description are only a few embodiments of the present invention, and those skilled in the art can obtain other drawings and other embodiments based on these drawings without requiring any creative effort.

[0030] To simplify the drawings, each drawing schematically shows only the parts relating to the present invention, and these do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some drawings, if components having the same structure or function, only one is schematically depicted or only one is shown. In this specification, "one" may mean not only "only one" but also "one or more."

[0031] Furthermore, the term "and / or" as used in the specification and claims of this application should be understood to mean, and include, any combination of one or more of the items listed in relation to this application and all possible combinations thereof.

[0032] In this specification, unless otherwise explicitly stated or limited, the terms “attachment,” “connection,” and “connection” should be understood in a broad sense, for example, whether it be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or internal communication between two elements. Those skilled in the art will be able to understand the specific meaning of these terms in the present invention depending on the specific circumstances.

[0033] Furthermore, in this description, terms such as "First," "Second," etc., are merely for illustrative purposes and should not be understood as indicating or suggesting relative importance. The above embodiments can be freely combined as needed. The above description is merely a preferred embodiment of the present invention, and those skilled in the art can make several further improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

[0034] As shown in Figures 1 and 2, the present invention provides a dryer comprising a main body housing 1 including a first outer housing 11 and a handle inner housing 12, wherein the first outer housing 11 has a first central axis, and the axial ends of the first outer housing 11 are an outlet end and a windbreak end, respectively, and the distance between the outlet end and the windbreak end is smaller than a preset distance, and the handle inner housing 12 is connected to the axial middle of the first outer housing 11, and the handle inner housing 12 has a second central axis, and the first central axis and the second central axis form a preset angle.

[0035] In this embodiment, the distance between the axial ends of the first outer housing 11 is smaller than a predetermined distance, and in this case, the main housing of the dryer can satisfy the design requirements of having a small axial length and a small volume, resulting in an excellent user experience.

[0036] Specifically, the handle inner housing 12 and the first outer housing 11 have a connecting end face, which has a first end and a second end along the direction of the first central axis, the first end being close to the outlet end and the second end being close to the windbreak end, the distance between the outlet end and the windbreak end being smaller than a preset distance, and this preset distance not exceeding twice the distance between the first end and the second end. If the distance between the first end and the second end is L1, the distance between the first end and the outlet end is L2, and the distance between the second end and the windbreak end is L3, then L1 + L2 + L3 ≤ 2 × L1. That is, L2 + L3 ≤ L1. The sum of the distance between the first end and the outlet end and the distance between the second end and the windbreak end is smaller than the distance between the first end and the second end. Preferably, the distance between the first end and the outlet end does not exceed half the distance between the first end and the second end, i.e., L2 ≤ L1 × 1 / 2, and the distance between the second end and the windbreak end does not exceed half the distance between the first end and the second end, i.e., L3 ≤ L1 × 1 / 2. In this case, the dryer's main housing can satisfy the design requirements of having a small axial length and small volume, and has an excellent user experience.

[0037] 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 outlet end and the windbreak end is smaller than the preset distance, and it should be noted that all such angles are within the scope of protection of this application.

[0038] Furthermore, both the handle inner housing and the first outer housing are annular, and the first central axis and the second central axis form a 90-degree angle, meaning that the first outer housing 11 and the handle inner housing 12 are relatively perpendicular, and in this case, the handle inner housing 12 and the first outer housing 11 are in communication. In this case, the distance between the first end and the second end is the diameter length of the handle inner housing 12, and the diameter length of the handle inner housing 12 does not exceed the axial length of the first outer housing 11. The distance from the connection point between the first outer housing 11 and the handle inner housing 12 to the outlet end does not exceed the radius of the handle inner housing 12, and the distance from the connection point between the first outer housing 11 and the handle inner housing 12 to the windbreak end does not exceed the radius of the handle inner housing 12. The axial length of the main housing 1 does not exceed twice the diameter of the handle inner housing 12. In this case, the main housing 1 of the dryer can satisfy the design requirements of having a small axial length and small volume, and has an excellent user experience.

[0039] Specifically, the length from the end of the handle inner housing 12 closest to the windbreak end along the first central axis to the windbreak end of the main housing 1 is the first length, and the first length is less than or equal to the radius of the handle inner housing 12. The length from the end of the handle inner housing 12 closest to the outlet end along the first central axis to the outlet end of the main housing 1 is the second length, and the second length is also less than or equal to the radius of the handle inner housing 12. In this case, the sum of the first length and the second length is less than or equal to the diameter of the handle inner housing 12. Furthermore, the axial length of the main housing 1 is less than or equal to twice the diameter of the handle inner housing 12.

[0040] More specifically, as shown in Figure 5, a discharge housing 111 is provided at the discharge end, and a heat-generating assembly 2, a PCB board 3, and a first mounting frame 4 are provided inside the discharge housing 111. The first mounting frame 4 is provided between the heat-generating assembly 2 and the PCB board 3, and fixes the heat-generating assembly 2 and the PCB board 3 together. The heat-generating assembly 2 is close to the discharge end, and a wind-shielding housing 112 is provided at the wind-shielding end, and the wind-shielding housing 112 is fixedly connected to the first mounting frame 4. In this embodiment, the first mounting frame 4 fixes and connects the heat generation assembly 2 and the PCB board 3. The heat generation assembly 2, the PCB board 3, and the first mounting frame 4 are all integrated and provided within the discharge housing 111. The discharge housing 111 is inserted into the discharge end of the main housing 1. A windbreak housing 112 is inserted into the windbreak end of the main housing 1. The windbreak housing 112 is fixedly connected to the first mounting frame 4. Furthermore, the windbreak housing 112 and the discharge housing 111 are fixedly attached to both axial ends of the main housing 1. The heat generation assembly 2, the PCB board 3, and the first mounting frame 4 are fixedly attached within the main housing 1.

[0041] It should be noted that the outlet housing 111 must be provided with a ventilation groove, and that the ventilation groove should connect the outlet housing 111 and the handle inner housing 12, face toward the wind-blocking end, and have its bottom flush with the end of the handle inner housing 12 that is close to the outlet end, so that the cold airflow inside the handle inner housing 12 can smoothly enter the outlet housing 111.

[0042] Furthermore, because the first length is slightly shorter than the second length, and the distance from the connection point between the first outer housing 11 and the handle inner housing 12 to the outlet end is greater than the distance from the connection point between the first outer housing 11 and the handle inner housing 12 to the windbreak end, the time the airflow passes through the heat-generating assembly 2 is increased, thereby ensuring the heating effect of the heat-generating assembly 2.

[0043] Furthermore, as shown in Figures 3 and 4, the PCB substrate 3 is located on the side closer to the windbreak end of the second central axis, and there are gaps between the first mounting frame 4 and the PCB substrate 3, and between the first mounting frame 4 and the heat-generating assembly 2, and the end of the heat-generating assembly 2 that is close to the windbreak end is located on the side closer to the windbreak end of the second central axis.

[0044] In this embodiment, by positioning the end of the heating assembly 2 that is close to the windbreak end relatively close to the windbreak end of the second central axis, the dryer of the present invention can maintain the axial length of the heating assembly 2 as much as possible, thereby enabling the heating assembly 2 to heat the airflow more quickly and effectively, and further ensuring the hot air effect of the dryer.

[0045] Specifically, the PCB board 3 and the first mounting frame 4 are positioned relatively close to the wind-shielding end of the second central axis, so that the PCB board 3 and the first mounting frame 4 are close to the wind-shielding end of the main housing 1, the second central axis divides the internal space of the handle inner housing 12 equally into upper and lower parts in the axial direction, the upper part is close to the wind-shielding end and the lower part is close to the outlet end, that is, the PCB board 3 and the first mounting frame 4 are located in the upper part, the end of the heat-generating assembly 2 that is close to the wind-shielding end is positioned relatively close to the wind-shielding end of the second central axis, that is, the end of the heat-generating assembly 2 that is close to the wind-shielding end is located in the upper part, and the other end of the heat-generating assembly 2 is in contact with the outlet end, at which point both ends of the heat-generating assembly 2 are located relatively on both sides of the second central axis, the length of the heat-generating assembly 2 is greater than half the axial length of the first outer housing 11, and the space inside the first outer housing 11 is utilized to the maximum extent, so that the heat-generating assembly 2 can heat the airflow for a longer period of time and the heating effect of the fan is ensured.

[0046] Note that the PCB substrate 3 is circular, and at least one flat corner is provided on the outer edge of the PCB substrate 3 along its circumferential direction. By providing a flat corner, there is a large gap between the PCB substrate 3 and the inner wall of the discharge housing 111. The airflow from the handle inner housing 12 to the discharge housing 111 passes through the flat corner and enters the rear side of the PCB substrate 3. This airflow then flows from the rear side of the PCB substrate 3 to the front side of the discharge housing 111 and is blown out from the discharge end, thereby improving the heat dissipation effect of the PCB substrate 3.

[0047] Furthermore, as shown in Figures 5 to 10, the heating assembly 2 includes a heating wire assembly 21, an annular inner housing 22, an annular outer housing 23, and a second mounting frame 24. The annular inner housing 22 has a plurality of support members 221 arranged around it along the direction of the first central axis, the heating wire assembly 21 is arranged around each support member 221 around the direction of the first central axis, the end of the heating wire assembly 21 that is close to the windbreak end is located relative to the second central axis, the annular outer housing 23 and the annular inner housing 22 are both provided on the side close to the outlet end of the second mounting frame 24, and the annular outer housing 23 is coaxially fitted to the outside of the annular inner housing 22.

[0048] In this embodiment, one end of the annular inner housing 22 is positioned relatively close to the windbreak end of the second central axis, and the end of the heating wire assembly 21 that is close to the windbreak end is positioned relatively on the second central axis. This ensures the axial length of the heating wire assembly 21, guarantees the airflow heating effect, reduces the contact time between the airflow and the heating wire assembly 21, and improves the airflow heating efficiency.

[0049] Specifically, the end of the heating wire assembly 21 adjacent to the windbreak end is located exactly in the middle of the airflow within the handle inner housing 12. The heating wire assembly 21 includes at least one heating wire, which is wavy and wound multiple times in the direction of the axis of the annular inner housing 22. The surface on which the heating wire is located at each circumference is perpendicular to the outer ring surface of the annular inner housing 22. A heating region is formed between two adjacent support members 221, and a portion of the heating wire is located within the heating region. The starting end of the heating wire is located relatively to the second central axis. Furthermore, the heating wire is wavy, and the surface on which the heating wire is located within a single wavelength range is approximately perpendicular to the axis of the annular inner housing 22. In other words, the surface on which the heating wire is located at each circumference is perpendicular to the outer ring surface of the annular inner housing 22, which increases the contact area between the airflow and the heating wire, and further improves the heating efficiency of the airflow by the heating wire. 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 to a single heating wire, using two heating wires connected in parallel and spaced apart provides a longer length and a larger contact area with the airflow, resulting in higher heating efficiency with respect to the airflow. The annular outer housing 23 and the annular inner housing 22 are provided coaxially, and the heating wire assembly 21 is positioned relatively between the annular outer housing 23 and the annular inner housing 22, thereby better insulating the heat from the heating wire assembly 21, lowering the temperature of the first outer housing 11, preventing the first outer housing 11 of the dryer from burning the user or deforming at high temperatures, and further improving the user experience. Preferably, the annular outer housing 23 is provided on the inner annular surface of the discharge housing 111 and matches the shape of the discharge housing 111, and when the annular inner housing 22 is located inside the windbreak housing 112, the annular outer housing 23 is provided coaxially with the annular inner housing 22. The annular outer housing 23, the annular inner housing 22 and the support member 221 may be made of mica sheet, porous ceramic, ceramic-based insulation material or high-temperature insulating cotton, or they may be made by spraying a high-temperature insulating coating onto a substrate.The first mounting frame 4 securely connects the heat-generating assembly 2 and the PCB board 3, thereby integrating and mounting them within the discharge housing 111. This not only strengthens the connection effect between the heat-generating assembly 2 and the PCB board 3, but also reduces the axial length after mounting the heat-generating assembly 2 and the PCB board 3. Furthermore, the annular outer housing 23 is provided on the inner ring surface of the discharge housing 111, further improving the heat insulation effect of the heat-generating assembly 2. This prevents the first outer housing 11 from burning the user or deforming at high temperatures, resulting in a more compact layout and increased space utilization.

[0050] Each heating element has multiple bent sections, and it should be noted that the ends of these bent sections are connected to form a corrugated bent ring that closes the contour of the heating element. By forming a corrugated bent ring, the effect of increasing the coverage of the heating element in the first cavity is achieved, thereby allowing it to heat up more quickly when cold air flows over it, improving heating efficiency with simple structural deformation, and improving space utilization, resulting in excellent practicality. Multiple position-restricting teeth are provided on the end face of the support member 221 that is away from the annular inner housing 22, and position-restricting grooves are formed between adjacent position-restricting teeth, so that multiple heating elements are placed in their respective position-restricting grooves, thereby preventing the heating elements from shifting. By fixing the heating elements by forming multiple position-restricting grooves with position-restricting teeth, the heating elements in the annular inner housing 22 are always held within the position-restricting grooves even when hot or cold air is continuously blown out, and are not affected by wind force, making the overall structure more reliable and practical. Furthermore, the number and width of the position-limiting teeth need to be adjusted according to the specific situation. For example, the number of teeth can be increased or decreased depending on the different winding methods of the heating wire, or the width of the position-limiting groove can be adjusted by adjusting the width of the position-limiting teeth.

[0051] Furthermore, as shown in Figures 11 and 12, the end of the handle inner housing 12 adjacent to the first outer housing 11 further has a control unit 123, the control unit 123 is recessed toward the blow-out end side along the radial direction of the handle inner housing 12, the control unit 123 has a second guide surface 1231 and a third guide surface 1232, the second guide surface 1231 is provided at the end of the control unit 123 adjacent to the first outer housing 11, the PCB substrate 3 is flush with the end of the second guide surface 1231 adjacent to the handle inner housing 12, and the third guide surface 1232 is provided at the end of the control unit 123 away from the first outer housing 11.

[0052] In this embodiment, since the PCB substrate 3 is flush with the end of the second guide surface 1231 that is close to the handle inner housing 12, the cold airflow inside the handle inner housing 12 can be guided by the second guide surface 1231 and the third guide surface 1232 of the control unit 123 to reach the surface of the PCB substrate 3. This is advantageous for heat dissipation of the PCB substrate 3 and prevents the temperature of the PCB substrate 3 from becoming too high, which would affect the service life of the PCB substrate 3.

[0053] Specifically, the control unit 123 is equipped with a control assembly for controlling the operation of the dryer. The control unit 123 is provided at the end of the handle inner housing 12 that is close to the wind-shielding end, and the control unit 123 is formed by the handle inner housing 12 being recessed inward. Specifically, the control unit 123 includes a second guide surface 1231, a third guide surface 1232, and a fourth guide surface 1233, the fourth guide surface 1233 is provided between the second guide surface 1231 and the third guide surface 1232, the fourth guide surface 1233 is aligned with the direction of the second central axis, the second guide surface 1231 is close to the first outer housing 11 and extends outward, the third guide surface 1232 is away from the first outer housing 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, thereby allowing wind to pass through the control unit 123 smoothly, resulting in a large airflow and low noise. Furthermore, the PCB substrate 3 is flush with the end of the second guide surface 1231 that is close to the handle inner housing 12, and the cold airflow that reaches the first outer housing 11 flows along the direction of the second central axis along the underside of the PCB substrate 3. The underside of the PCB substrate 3 is located on the side close to the outlet end of the PCB substrate 3, and since this cold airflow is not heated by the heat-generating assembly 2, it is advantageous for lowering the temperature of the PCB substrate 3 and prevents the PCB substrate 3 from becoming too hot and being damaged if the cold airflow passes through the PCB substrate 3 after being heated by the heat-generating assembly 2. Furthermore, because the second guide surface 1231 is inclined toward the windbreak end, the cold airflow in the handle inner housing 12 has the inertia to flow toward the windbreak end. At this time, the cold airflow not only flows along the bottom surface of the PCB substrate 3, but some of the cold airflow can reach the side of the PCB substrate 3 that is close to the windbreak end. At this time, some of the cold airflow flows along the top surface of the PCB substrate 3, which can better remove heat from both sides of the PCB substrate 3 and prevent overheating of components on the PCB substrate 3.

[0054] Furthermore, as shown in Figures 12 and 13, a guide member 124 is further provided at the end of the handle inner housing 12 that is close to the first outer housing 11. The guide member 124 is relatively close to the outlet end and has a first guide surface 1241. The first guide surface 1241 and the second guide surface 1231 face each other and provide guidance, so that the cold airflow from the handle inner housing 12 can flow to the PCB substrate 3 along the direction of the first guide surface 1241 of the guide member 124. Additionally, a plurality of first through holes 41 are provided in the first mounting frame 4, so that the airflow flowing over the PCB substrate 3 can flow through the first through holes 41 along the direction of the first central axis to the outlet end and flow through the heat-generating assembly 2.

[0055] In this embodiment, a guide member 124 is further provided at the end of the handle inner housing 12 adjacent to the first outer housing 11, and the first guide surface 1241 and the second guide surface 1231 of the guide member 124 face each other to provide guidance, thereby reducing the cross-sectional area of ​​the air passage in the ventilation groove, further increasing the wind speed through which the cold air flows through the ventilation groove, improving the fluidity of the cold air flow, making stagnation less likely, and causing the cold air flow to flow to the front and rear sides of the PCB substrate 3 and concentrate around the PCB substrate 3, further enhancing the heat dissipation effect of the PCB substrate 3.

[0056] Specifically, the control unit 123 and the guide member 124 are provided on both sides of the second central axis, and the first guide surface 1241 of the guide member 124 faces the windbreak end. The first guide surface 1241 gradually increases in height along the airflow direction, that is, the thickness of the guide member 124 along the direction of the first central axis gradually increases, and as the guide member 124 approaches the control unit 123, the cross-sectional area of ​​the air passage in the ventilation groove gradually decreases. As the first guide surface 1241 approaches the first outer housing 11 and blocks a portion of the ventilation groove, a small portion of the heating wire assembly 21 is located in the direction of the cold airflow, and most of the heating wire assembly 21 is blocked by the guide member 124. At this time, the cold airflow preferentially flows along the direction of the first guide surface 1241 of the guide member 124 to the windbreak end and flows over the PCB substrate 3, and then flows over the heating assembly 2 along the direction of the first central axis. Furthermore, the guide member 124 reduces the cross-sectional area of ​​the air passage in the ventilation groove, and if the force of the blower assembly 5 remains unchanged, the wind pressure of the cold air at that location increases. This improves the wind speed and fluidity of the cold airflow as it passes through the ventilation groove, making the airflow more uniform during the heating and blowing processes. In this embodiment, the three heating wires of the heating wire assembly 21 are located on the side close to the wind-blocking end of the first guide surface 1241, while the others are blocked by the guide member 124. By further providing a plurality of first through holes 41 in the first mounting frame 4, the first mounting frame 4 forms a perforated structure, and the first through holes 41 are used for the airflow between the heating assembly 2 and the PCB substrate 3. Heat generated by components on the PCB substrate 3 is removed by the airflow through the first through holes 41, preventing the component temperature from becoming too high and affecting the normal operation of the component. The first through holes 41 also increase the airflow rate between the heating assembly 2 and the PCB substrate 3, improving the airflow volume and fluidity of the airflow.

[0057] It should be noted that the inclination angle of the first guide surface 1241 being 0 to 45° ensures smooth airflow and low noise. A fifth guide surface 1242 is further provided at the end of the guide member 124 away from the first outer housing 11, and the inclination of the fifth guide surface 1242 is greater than that of the first guide surface 1241. As a result, the angle at which the airflow direction changes when passing through the fifth guide surface 1242 is greater than that of the first guide surface 1241, allowing the airflow to be guided more effectively to the PCB substrate 3 inside the main housing 1, thereby reducing noise and improving the user experience. The length of the fifth guide surface 1242 is smaller than that of the first guide surface 1241, improving the stability of the guidance effect. The inclination angle of the fifth guide surface 1242 being 0 to 60° provides a high guidance effect. The guide member 124 is not limited to this and may be a guide block, guide bar, or guide pipe, etc., as long as it meets the needs.

[0058] Furthermore, the handle inner housing 12 is provided with a first insertion portion 1211, and the guide member 124 is provided with a first insertion groove 1243. When installing, the guide member 124 can be inserted upward through the first insertion groove 1243 into the first insertion portion 1211, making installation and removal convenient and the structure simple. In addition, for a secure connection between the handle inner housing 12 and the guide member 124, screws can be used to fasten the handle inner housing 12 and the guide member 124 together. It should be noted that this application does not further limit the connection structure between the guide member 124 and the handle inner housing 12, and as long as the guide member 124 satisfies the guidance needs, it is within the scope of protection of this application.

[0059] Furthermore, as shown in Figure 4, the support members 221 are symmetrical along the second central axis, and one support member 221 adjacent to the handle inner housing 12 is provided along the direction of the second central axis, so that the airflow passing through this support member 221 splits and flows symmetrically to both sides of the heating assembly.

[0060] In this embodiment, a support member 221 adjacent to the handle inner housing 12 is provided along the direction of the second central axis. As a result, the airflow passing through this support member 221 is divided and flows symmetrically to both sides of the heating assembly 2, making the airflow on both sides of the heating assembly 2 more uniform, and furthermore, the blowing and heating effects are more stable and reliable.

[0061] Specifically, multiple support members 221 are distributed symmetrically along the radial direction of the annular inner housing 22, and the enclosed area formed between the annular outer housing 23 and the annular inner housing 22 is uniformly divided into multiple heating compartments by the multiple support members 221, thereby facilitating the flow of gas between them and improving heating efficiency. The number of support members 221 can be adjusted according to the size of the annular inner housing 22 or the required heating effect. In this embodiment, one support member 221 adjacent to the handle inner housing 12 is provided along the direction of the second central axis, and the cold airflow inside the handle inner housing 12 is uniformly divided into two airflows by this support member 221. As these two airflows flow along the inner ring surface of the annular outer housing 23, the airflow rates on both sides of this support member 221 become approximately the same, the airflow on both sides of the heating assembly 2 becomes more uniform, the hot airflow after heating by the heating assembly 2 becomes more uniform and flexible, and the stability and reliability of the blow-out and heating effect are further improved. Preferably, there are 12 support members 221, which surround the annular inner housing 22 at equal intervals, dividing the annular inner housing 22 into 12 equal parts and forming 12 heating compartments. The uniformity of the airflow is ensured by the consistent spacing between each heating compartment. In other embodiments, the number of support members 221 can be adjusted to increase or decrease the number of heating compartments. This application does not limit the specific number of support members 221, and includes, but is not limited to, 12. It should be noted that as long as one support member 221 adjacent to the handle inner housing 12 is provided along the direction of the second central axis and can play a role in uniformly dividing the airflow, all such configurations are within the scope of this application.

[0062] Furthermore, as shown in Figures 7 and 8, the annular inner housing 22 is fitted to the side of the second mounting frame 24 that is close to the outlet end, and a fixing groove 241 is further provided at a position on the second mounting frame 24 corresponding to the support member 221, and the support member 221 is engaged with the fixing groove 241.

[0063] In this embodiment, the annular inner housing 22 is fitted onto the second mounting frame 24, and the support member 221 is inserted into the fixing groove 241. This securely fixes the annular inner housing 22 and the support member 221 to the second mounting frame 24, thereby facilitating the fixed connection between the heat generation assembly 2 and the first mounting frame 4. Furthermore, this fixing method effectively reduces the axial length of the heat generation assembly 2.

[0064] Specifically, the fixing groove 241 is arranged around the second mounting frame 24 along the axial direction, the position of the fixing groove 241 corresponds one-to-one with the position of the support member 221, the opening of the fixing groove 241 faces the discharge end, and the annular inner housing 22 is locked to the outer ring surface of the second mounting frame 24 along the direction of the first central axis. As the annular inner housing 22 is fitted to the outer ring surface of the second mounting frame 24, the annular inner housing 22 and the second mounting frame 24 overlap at least partially, reducing the axial length of the heating assembly 2. At this time, the support member 221 is inserted just into the fixing groove 241, thereby supporting the support member 221, strengthening the connection strength between the annular inner housing 22 and the second mounting frame 24, and preventing separation of the annular inner housing 22 and the second mounting frame 24. Preferably, the annular inner housing 22 is further provided with a plurality of positioning grooves, each of which corresponds one-to-one with a support member 221, and each support member 221 is provided with a positioning locking member that fits into the corresponding positioning groove, and the positioning locking member is engageable with the corresponding positioning groove, thereby fixing the support member 221 to the annular inner housing 22. The engagement between the positioning groove and the positioning locking member ensures the stability of the support member 221 and ensures the accurate positioning of the support member 221, which is advantageous for mounting the support member 221, and also prevents the support member 221 from shifting or sliding during the process of the operator attaching the heating wire to the support member 221.

[0065] Furthermore, as shown in Figures 9 and 10, a first locking member 42 and a first fixing structure 43 are provided at one end of the first mounting frame 4. The first locking member 42 is locked to the peripheral edge of the PCB substrate 3, and the first fixing structure 43 penetrates the PCB substrate 3 and is fixedly connected to the windbreak housing 112. A second locking member 44 and a second fixing structure 45 are provided at the other end of the first mounting frame 4. The second locking member 44 is locked to the second mounting frame 24, and the second fixing structure 45 is fixedly connected to the second mounting frame 24.

[0066] In this embodiment, the first mounting frame 4 is fixedly connected to the PCB substrate 3 by the first locking member 42 and the first fixing structure 43, and fixedly connected to the second mounting frame 24 by the second locking member 44 and the second fixing structure 45. As a result, the PCB substrate 3 and the heat-generating assembly 2 are fixedly mounted within the blow-out housing 111, strengthening the connection strength between the PCB substrate 3 and the heat-generating assembly 2, preventing positional changes between the PCB substrate 3 and the heat-generating assembly 2, and improving the mounting efficiency of the PCB substrate 3 and the heat-generating assembly 2.

[0067] Specifically, there are at least two first locking members 42, and the two first locking members 42 are provided on the side of the mounting plate that is close to the PCB substrate 3, and are located on both sides of the outer edge of the first mounting frame 4. The first locking members 42 are suitable for locking to the PCB substrate 3 and can support and fix the PCB substrate 3. By locking at least two first locking members 42 to the PCB substrate 3, movement of the PCB substrate 3 away from the first mounting frame 4 is restricted, preventing the outer edge of the PCB substrate 3 from vibrating significantly under the action of high-speed airflow, further preventing cracks from occurring and damaging the PCB substrate 3, and also preventing the connection between the PCB substrate 3 and the heat-generating assembly 2 from being broken. In addition, by fixing the first locking members 42 to the PCB substrate 3, the efficiency of mounting and removing can be improved. The first fixing structure 43 includes at least two first mounting columns, which are distributed on the side of the first mounting frame 4 closest to the PCB board 3. The PCB board 3 is provided with mounting holes suitable for inserting the first mounting columns, and the first mounting columns are fixedly connected to the windbreak housing 112 by passing through the mounting holes in the PCB board 3. The distributed first mounting columns prevent relative rotation between the PCB board 3 and the first mounting frame 4, and further prevent damage to the connection between the PCB board 3 and the heat-generating assembly 2. At the same time, the multiple first mounting columns act as guides for the mounting of the PCB board 3, preventing the PCB board 3 from being mounted incorrectly and improving the mounting efficiency of the PCB board 32. A second support portion 242 is further provided in the middle of the second mounting frame 24 on the side close to the windbreak end. The second support portion 242 is used to limit the distance between the first mounting frame 4 and the second mounting frame 24, preventing the heat-generating assembly 2 from getting too close to the first mounting frame 4 and damaging it.A first support portion 46 is further provided at a corresponding position on the first mounting frame 4, and a plurality of third support portions are provided along the circumferential direction of the second mounting column at the end of the second mounting column connected to the first mounting frame 4. The third support portions are used to support the PCB board 3. Both the first support portions 46 and the third support portions are for controlling the distance between the first mounting frame 4 and the PCB board 3, thereby preventing the first mounting frame 4 from being too close to the PCB board 3 and affecting heat dissipation to the PCB board 3, while also preventing the first mounting frame 4 from pressing against components on the PCB board 3. The first support portion 46 has a first through hole, and the second support portion has a second through hole. A locking hook is provided on the second mounting frame 24, and a locking groove is provided on the first support portion 46 of the first mounting frame 4. The engagement of the locking hook and the locking groove causes the second locking member 44 to lock the second support portion 242 and the first support portion 46. The second fixing structure 45 includes a plurality of second mounting posts and counterbore holes. The second mounting posts are provided on the side of the second mounting frame 24 that is close to the first mounting frame 4. Counterbore holes are provided in the first mounting frame 4 at positions corresponding to the second mounting posts. The second mounting frame 24 and the first mounting frame 4 are fixedly connected by fixing the second mounting posts and the counterbore holes with screws. By providing counterbore holes, the screws in the counterbore holes do not protrude from the surface of the first mounting frame 4, thus not affecting components on the PCB substrate 3. Furthermore, because the second mounting frame 24 is positioned precisely in the gap between the second mounting frame 24 and the first mounting frame 4, the axial length of the heat generation assembly 2 does not increase.

[0068] It should be noted that the overall strength of the first mounting frame 4 can be improved by further providing a plurality of first through-holes in the first mounting frame 4, providing reinforcing ribs within the first through-holes, and arranging them radially. The reinforcing ribs include outer ribs and inner ribs, with one end of the inner rib connected to the outer edge of the first mounting frame 4 and the other end extending away from the first mounting frame 4, and the entire structure being radial, and the outer ribs sequentially connected to the ends of the inner ribs that are away from the first mounting frame 4. By providing outer ribs and inner ribs and arranging the entire inner rib radially, the smoothness of the heat airflow from components on the PCB substrate passing through the first through-holes 41 can be improved, and the overall strength of the first mounting frame 4 can be guaranteed. The first locking member 42 and the second locking member 44 include, but are not limited to, locking structures such as locking hooks and locking grooves. The first fixing structure 43 and the second fixing structure 45 include, but are not limited to, fixing structures such as mounting columns and screws.

[0069] Furthermore, as shown in Figure 7, a thermistor 125 and a thermostat 126 are provided at the end of the annular inner housing 22 adjacent to the outlet end. The thermistor 125 and thermostat 126 are symmetrical with respect to the direction of the first central axis, and are located relatively in the middle of the left and right sides of the outer ring surface of the annular inner housing 22.

[0070] In this embodiment, the spatial layout is more rational because the thermistor 125 and thermostat 126 are symmetrical with respect to each other along the direction of the first central axis, and the relative distance between the thermistor 125 and thermostat 126 allows for monitoring of the temperature of the hot air passing through the heating wire assembly 21 over a wider range. Furthermore, because the multiple support members 221 uniformly divide the annular inner housing 22, and the thermistor 125 and thermostat 126 are located relatively in the middle of the left and right sides of the outer ring surface of the annular inner housing 22, precisely at the two points with the highest temperature within the annular outer housing 23, the thermistor 125 and thermostat 126 can monitor the temperature of the hot air passing through the heating wire assembly 21 in a timely and accurate manner.

[0071] Specifically, a second groove is provided at the end of the annular inner housing 22 that is close to the outlet end, and the thermostat 126 is mounted in the second groove and is located relative to the outer ring surface of the annular inner housing 22. The thermostat 126 and the heating element assembly 21 are separated from each other, and the thermostat 126 is relatively close to the outlet end of the main housing 1, allowing it to sample and monitor the hot air passing through the heating element assembly 21. A first groove is provided at the end of the annular inner housing 22 that is close to the outlet end, and the connecting member of the thermistor 125 penetrates the first groove and is connected to the PCB substrate 3 from inside the annular inner housing 22, thereby effectively protecting the connecting member. The first groove and the second groove are located relatively in the middle of both the left and right sides of the outer ring surface of the annular inner housing 22 and are provided symmetrically along the first central axis. A fuse is further provided on the inner ring surface of the annular inner housing 22, and the fuse is positioned along the direction of the first central axis. A third groove is further provided penetrating the annular inner housing 22 at the position corresponding to the fuse, and the third groove fits the fuse, so that the fuse is located relatively inside the annular inner housing 22. The further provision of a fuse on the inner ring surface of the annular inner housing 22 prevents the heating wire assembly 21 from continuously becoming hot by the fuse melting when overloaded, thus avoiding serious damage from a dryer. Furthermore, the provision of a third groove in the annular inner housing 22 that fits the fuse ensures that the fuse has a good operating environment and does not experience premature or delayed melting.

[0072] In this embodiment, the twelve support members 221 surround the annular inner housing 22 at equal intervals, dividing the annular inner housing 22 into twelve equal parts. The support members 221 on both the left and right sides of the outer ring surface of the annular inner housing 22 are parallel to each other. The thermistor 125 is located above the support members 221, and the thermostat 126 is located below the support members 221, or vice versa.

[0073] Furthermore, as shown in Figure 10, a capacitor 31 is provided in the middle of the end of the PCB board 3 that is close to the blowout end. The capacitor 31 penetrates the first mounting frame 4 and the second mounting frame 24 to reach the inside of the annular inner housing 22 and does not protrude from the annular inner housing 22.

[0074] In this embodiment, the capacitor 31 is positioned midway along the edge of the PCB substrate 3 that is close to the outlet end, and the capacitor 31 penetrates the first mounting frame 4 and the second mounting frame 24 to reach the inside of the annular inner housing 22. This effectively avoids the major housing problem of the capacitor 31 and reduces the axial length of the main housing 1. Furthermore, because the capacitor 31 is positioned relatively midway along the annular inner housing 22 and does not protrude from the annular inner housing 22, the capacitor 31 can be effectively protected from damage due to high temperatures.

[0075] Specifically, the capacitor 31 and the heat-generating assembly 2 overlap at least partially, reducing the distance between the PCB board 3 and the heat-generating assembly 2. Furthermore, the axial space occupied by the PCB board 3 and the heat-generating assembly 2 in the main housing 1 is reduced, allowing the main housing 1 to be made thinner and meeting the needs of miniaturization and user usage. The capacitor 31 is located inside the annular inner housing 22, which effectively reduces the transfer of heat from the heating element assembly 21 to the inside of the annular inner housing 22, preventing the capacitor 31 from being in an overheating environment. The overall structure is also simple and easy to install. A second support portion 242 is further provided in the middle of the second mounting frame 24 on the side close to the wind-shielding end, and the second support portion has a second insertion hole. A first support portion 46 is further provided at the corresponding position on the first mounting frame 4, and the first support portion 46 has a first insertion hole. The capacitor 31 penetrates the first and second insertion holes to reach the inside of the annular inner housing 22. Furthermore, the first support portion 46 creates a gap between the first mounting frame 4 and the PCB board 3, and the second support portion 242 creates a gap between the first mounting frame 4 and the second mounting frame 24. This prevents the PCB board 3 from being too close to the heat-generating assembly 2, which would cause the PCB board 3 to overheat and break, and consequently prevent the heat from being dissipated from the components on the PCB board 3, thus preventing the PCB board 3 from spontaneously burning. In addition, the capacitor 31 passes through the first and second insertion holes, the second support portion 242 and the first support portion 46 come into contact with each other, the first support portion 46 comes into contact with the PCB board 3, and the second support portion 242 and the first support portion 46 are fitted to the outside of the capacitor 31. This effectively protects the capacitor 31 and prevents it from receiving excess heat. During the installation process, the second support portion 242 and the first support portion 46 have a certain degree of mounting guidance, making it convenient to insert the capacitor 31 into the first mounting frame 4 and the second mounting frame 24.

[0076] Furthermore, as shown in Figures 2 and 14, the handle inner housing 12 includes a first inner housing 121 and a second inner housing 122. An annular connecting portion is provided at the end of the first inner housing 121 that is close to the first outer housing 11, and the annular connecting portion fixes the middle part of the first outer housing 11. The second outer housing 6 is engaged with the first outer housing 11 along the direction of the first central axis, and the first outer housing 11 is close to the outlet end.

[0077] In this embodiment, the first inner housing 121 and the second inner housing 122 are engaged vertically to form the handle inner housing 12, making assembly simple and quick. Furthermore, the annular connection portion provided on the first inner housing 121, which is fixedly connected to the first outer housing 11, significantly strengthens the connection strength between the handle inner housing 12 and the first outer housing 11.

[0078] Specifically, a control unit 123 is provided on the side of the first outer housing 11 that is close to the wind-blocking end, a first insertion part 1211 is provided on the side of the annular connection part that is close to the discharge end, a guide member 124 is inserted into the first insertion part 1211, and a blower assembly 5 is further provided inside the first outer housing 11.

[0079] The blower assembly 5 includes, but is not limited to, a fan, an air pump, etc., and it should be noted that this application does not further limit it.

[0080] Furthermore, as shown in Figures 1 and 14, the system further includes a second outer housing 6 fitted into the handle inner housing 12 along the direction of the second central axis, and the end of the second outer housing 6 away from the first outer housing 11 is further provided with a cover 61 and an inner filter holder 62, the inner filter holder 62 is locked to the first outer housing 11 and the cover 61 is removably fitted to the inner filter holder 62 by a magnetic attraction structure.

[0081] In this embodiment, the second outer housing 6 is fitted into the handle inner housing 12 along the direction of the second central axis, which effectively prevents damage to the control components and blower assembly 5 inside the handle inner housing 12. Furthermore, a cover 61 and an inner filter holder 62 are provided at the end of the second outer housing 6 that is separated from the first outer housing 11. The inner filter on the inner filter holder 62 prevents foreign matter from entering the inside of the handle inner housing 12. The cover 61 is removably fitted into the inner filter holder 62 by a magnetic attraction structure, making it convenient to attach and detach, and convenient to remove the cover 61 to clean the inside.

[0082] Specifically, the cover 61 is provided with an air intake, and external airflow can pass through the air intake and the mesh of the inner filter in sequence before entering the handle inner housing 12. The inner filter holder 62 is provided with a first pass-through hole for the conductor to pass through, and the cover 61 is provided with a second pass-through hole for the conductor to pass through. The inner filter holder 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 and the lower end of the second outer housing 6 are detachably connected via a connecting structure. The lower end plate is provided with a first pass-through hole. 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 intake, and the cover top is detachably connected to the lower end plate by a magnetic attraction structure.

[0083] Note that both the inner filter and the inner filter holder 62 are cylindrical. The second outer housing 6 is provided with slide holes and button holes used by the control unit 123, making it convenient to control the control components on the handle inner housing 12 from the second outer housing 6.

[0084] Furthermore, the above embodiments can be freely combined as needed. The above description is merely a preferred embodiment of the present invention, and it is believed that those skilled in the art can make several further improvements and modifications without departing from the principles of the present invention, and that these improvements and modifications are also within the scope of protection of the present invention. [Explanation of symbols]

[0085] 1. Main Housing 11. First Outer Housing 111 Outlet Housing 112 Windbreak Housing 12 Handle inner housing 121 First Inner Housing 1211 First insertion part 122 Second Inner Housing 123 Control Unit 1231 Second Guide Surface 1232 Third Guide Surface 1233 Fourth Guide Panel 124 Guide Member 1241 First guide surface 1242 Fifth Guide Surface 1243 First insertion groove 125 Thermistor 126 Thermostat 2 Heat-generating assembly 21. Heating wire assembly 22 Annular Inner Housing 221 Support member 23 Annular outer housing 24. Second mounting frame 241 Fixed groove 242 Second support part 3 PCB boards 31 Capacitors 4. First mounting frame 41 First through hole 42 First locking member 43 1st fixed structure 44 Second locking member 45 Second fixed structure 46 1st support part 5. Blower Assembly 6. Second Outer Housing 61 Cover 62 Inner filter holder

Claims

1. The main housing includes a first outer housing and a handle inner housing, the outer wall of the first outer housing is provided with a connecting end face, and the handle inner housing communicates with the first outer housing via the connecting end face. The first outer housing has a first central axis, and both ends of the first outer housing on the first central axis are an outlet end and a windbreak end, respectively. The two ends of the connecting end face in the direction of the first central axis are the first end and the second end, respectively, and the distance between the discharge end and the windbreak end does not exceed twice the distance between the first end and the second end. A hair dryer characterized by the following features.

2. The connecting end face is located at an intermediate position relative to the first central axis of the first outer housing, the handle inner housing has a second central axis perpendicular to the first central axis, the first end is close to the outlet end, the second end is close to the windbreak end, the distance between the first end and the outlet end does not exceed the radius of the connecting end face, and the distance between the second end and the windbreak end does not exceed the radius of the connecting end face. The hair dryer according to feature 1.

3. A discharge housing is provided at the discharge end, and a heating assembly, a PCB substrate, and a first mounting frame are provided inside the discharge housing, the first mounting frame is provided between the heating assembly and the PCB substrate, and fixes the heating assembly and the PCB substrate, and the heating assembly is close to the discharge end, A windbreak housing is provided at the windbreak end, and the windbreak housing is fixedly connected to the first mounting frame. The hair dryer according to feature 2.

4. The PCB substrate is located relatively close to the windbreak end of the second central axis, There is a gap between the first mounting frame and the PCB substrate, and between the first mounting frame and the heating assembly, and one end of the heating assembly is located on the side of the second central axis that is closer to the windbreak end. The hair dryer according to feature 3.

5. The end of the handle inner housing adjacent to the first outer housing further has a control unit, the control unit is recessed toward the blow-out end side along the radial direction of the handle inner housing, The control unit has a second guide surface and a third guide surface, the second guide surface is provided at the end of the control unit adjacent to the first outer housing, and the PCB substrate is flush with the end of the second guide surface adjacent to the handle inner housing. The third guide surface is provided at the end of the control unit that is separated from the first outer housing, The hair dryer according to feature 4.

6. A guide member is further provided at the end of the handle inner housing that is close to the first outer housing, and the guide member is relatively close to the outlet end and has a first guide surface, and by the first guide surface and the second guide surface facing each other and guiding, the cold airflow of the handle inner housing can flow to the PCB substrate along the direction of the first guide surface of the guide member. By further providing a plurality of first through holes in the first mounting frame, the airflow flowing over the PCB substrate flows through the first through holes along the direction of the first central axis to the outlet end and then flows over the heat-generating assembly. The hair dryer according to feature 5.

7. The heating assembly includes a heating wire assembly, an annular inner housing, an annular outer housing, and a second mounting frame, wherein the annular inner housing has a plurality of support members arranged circumferentially along the direction of the first central axis, the heating wire assembly is arranged circumferentially around each of the support members around the direction of the first central axis, and the end of the heating wire assembly adjacent to the windbreak end is located relative to the second central axis. The annular outer housing and the annular inner housing are both provided on the side of the second mounting frame that is close to the outlet end, and the annular outer housing is coaxially fitted to the outside of the annular inner housing. The hair dryer according to feature 3.

8. The support members are symmetrical along the second central axis, and one of the support members adjacent to the handle inner housing is provided along the direction of the second central axis, so that the airflow passing through this support member splits and flows symmetrically to both sides of the heating assembly. The hair dryer according to feature 7.

9. The annular inner housing is fitted onto the side of the second mounting frame adjacent to the outlet end, and a fixing groove is further provided at the position of the second mounting frame corresponding to the support member, and the support member is engaged within the fixing groove. The hair dryer according to feature 7.

10. A first locking member and a first fixing structure are provided at one end of the first mounting frame, the first locking member is locked to the peripheral edge of the PCB substrate, and the first fixing structure is fixedly connected to the windbreak housing by penetrating the PCB substrate. A second locking member and a second fixing structure are provided at the other end of the first mounting frame, the second locking member is locked to the second mounting frame, and the second fixing structure is fixedly connected to the second mounting frame. The hair dryer according to feature 7.

11. A thermistor and a thermostat are further provided at the end of the annular inner housing adjacent to the outlet end, the thermistor and the thermostat are symmetrical with respect to the direction of the first central axis, and the thermistor and the thermostat are relatively located in the middle of both the left and right sides of the outer ring surface of the annular inner housing. The hair dryer according to feature 7.

12. A capacitor is further provided in the middle of the end of the PCB substrate adjacent to the blow-out end, and the capacitor penetrates the first mounting frame and the second mounting frame to reach the inside of the annular inner housing and does not protrude from the annular inner housing. The hair dryer according to feature 7.

13. The handle inner housing includes a first inner housing and a second inner housing, and an annular connecting portion is provided at the end of the first inner housing adjacent to the first outer housing, and the annular connecting portion fixes the middle part of the first outer housing. The second outer housing engages with the first outer housing along the direction of the first central axis, and the first outer housing is close to the outlet end. The hair dryer according to feature 1.

14. A control unit is provided on the side of the first outer housing that is close to the wind-shielding end, and a first insertion part is provided on the side of the annular connection part that is close to the outlet end, and a guide member is inserted into the first insertion part. A blower assembly is further provided inside the first outer housing. The hair dryer according to feature 13.

15. The present invention further includes a second outer housing fitted into the handle inner housing along the direction of the second central axis, A cover and an inner filter holder are further provided at the end of the second outer housing that is separated from the first outer housing, the inner filter holder is locked to the first outer housing, and the cover is removably fitted onto the inner filter holder by a magnetic attraction structure. The hair dryer according to feature 14.

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