A heating assembly and hairdryer

Abstract

The application relates to the field of hair dryers, and provides a heating assembly and a hair dryer. The heating assembly is coaxially arranged in the air outlet cavity of the hair dryer. The heating frame of the heating assembly is recessed inward at one end away from the central axis of the air outlet cavity to form a first recessed groove. The groove bottom of the first recessed groove forms a first mounting surface. The heating wire is fixedly wound on the first mounting surface of the heating frame, and the outer periphery of the heating wire is located in the inner side area of the first recessed groove, so that an annular air duct is formed between the outer periphery of the heating wire and the cavity wall of the air outlet cavity. According to the application, the middle of the one end of the heating frame away from the central axis of the air outlet cavity is recessed to form the first recessed groove. The heating wire is fixedly wound on the groove bottom of the first recessed groove, and the outer periphery of the heating wire is located in the inner side area of the first recessed groove. The radial distance between the outer periphery of the heating wire and the outer wall of the air outlet cavity is increased, so that the annular air duct is formed between the outer periphery of the heating wire and the outer wall of the air outlet cavity. The cold air flow entering from the handle can flow along the annular air duct outside the heating wire in priority, and the effective ventilation section is expanded.

Description

Technical Field

[0001] This utility model relates to the field of hair dryers, and further to a heating component and a hair dryer. Background Technology

[0002] Existing hair dryers suffer from a thin head design and a ring-shaped air duct structure, resulting in a narrow internal airflow channel and a small ventilation cross-sectional area. The heating wires are concentrated in the head, while the air inlet is located at the handle and directly opposite the center of the heating wires, causing the airflow from the motor to blow directly onto the heating wires. During this process, some airflow escapes from the outlet near the handle without proper guidance, resulting in a significantly lower airflow volume at the head outlet compared to the area near the handle, leading to poor airflow uniformity. Simultaneously, due to insufficient airflow at the top, the airflow cannot effectively remove heat, causing the heating wires to continuously accumulate heat and glow red-hot, resulting in an abnormally high head temperature. This not only poses a risk of burns but also leaves a high residual temperature after shutdown, affecting user safety and experience. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this utility model is to provide a heating component and a hair dryer. By lowering the middle of one end of the heating frame away from the central axis of the air outlet cavity to form a first recessed groove, the heating wire is fixedly wound around the bottom of the first recessed groove, with the outer periphery of the heating wire located in the inner area of ​​the first recessed groove. This increases the radial distance between the outer periphery of the heating wire and the outer wall of the air outlet cavity, forming an annular air channel between the outer periphery of the heating wire and the outer wall of the air outlet cavity. The airflow entering from the handle can preferentially flow along the annular air channel outside the heating wire, which not only expands the effective ventilation cross section but also enhances the air volume output in the top area of ​​the hair dryer, thereby significantly improving heat dissipation conditions, preventing the heating wire from overheating and glowing red, and effectively alleviating the problems of the top of the hair dryer being too hot to handle and having excessive residual temperature.

[0004] To achieve the above objectives, this utility model provides a heating component, which is coaxially disposed inside the air outlet cavity of a hair dryer. The heating component includes a heating frame and a heating wire.

[0005] The heating frame has a first recessed groove formed at one end opposite to the central axis of the air outlet cavity. The bottom of the first recessed groove forms a first mounting surface. The heating wire is fixedly wound around the first mounting surface of the heating frame, and the outer periphery of the heating wire is located in the inner area of ​​the first recessed groove, so that an annular air duct is formed between the outer periphery of the heating wire and the cavity wall of the air outlet cavity.

[0006] In some embodiments, the heating frame includes a first frame, a second frame, and a third frame arranged sequentially along the axial direction of the air outlet cavity. The second frame connects the first frame and the third frame. The height of the side of the second frame away from the central axis of the air outlet cavity is lower than the height of the sides of the first frame and the second frame away from the central axis of the air outlet cavity, such that the side of the second frame away from the central axis of the air outlet cavity forms the first mounting surface.

[0007] In some embodiments, the second frame is further recessed inward on the side opposite to the central axis of the air outlet cavity to form a second recessed groove. The second recessed groove is located on the side of the second frame near the air outlet cavity. The bottom of the second recessed groove forms a second mounting surface. The height of the second mounting surface is lower than the height of the first mounting surface. At least a portion of the heating wire is wound around the second mounting surface, and the outer periphery of this portion of the heating wire is lower than the outer periphery of the other portion of the heating wire.

[0008] In some embodiments, the first mounting surface and the second mounting surface have equal axial lengths in the air outlet cavity.

[0009] In some embodiments, the first mounting surface and the second mounting surface are respectively provided with a plurality of limiting grooves spaced apart along the axial direction of the air outlet cavity, and the heating wire is correspondingly embedded in the limiting groove.

[0010] In some embodiments, the top of the first frame away from the third frame is adapted to abut against and be fixed to one axial end of the air outlet cavity, and the bottom of the first frame away from the third frame is also provided with a first notch;

[0011] And / or, the bottom of the third frame away from the first frame is adapted to abut against and be fixed to the other end of the air outlet cavity axially, and the top of the third frame away from the first frame is also provided with a second notch.

[0012] In some embodiments, an outer heat insulation sheet and an inner heat insulation sheet are also included, wherein the outer heat insulation sheet is disposed on the outer side wall of the air outlet cavity, and the inner heat insulation sheet is disposed on the inner side wall of the air outlet cavity;

[0013] The first frame and the third frame are adapted to abut and be fixed to the outer heat insulation sheet at the ends opposite to the central axis of the air outlet cavity, and the first frame and the third frame are adapted to abut and be fixed to the inner heat insulation sheet at the ends near the central axis of the air outlet cavity.

[0014] In some embodiments, a support base is also included, which is disposed at the end of the inner heat insulation sheet away from the air outlet of the air outlet cavity, and the heating frame is disposed axially between the inner wall of the air outlet cavity and the support base.

[0015] In some embodiments, the heating rack is further recessed inward on one side near the central axis of the air outlet cavity, and the heat dissipation groove corresponds to the first mounting surface and the second mounting surface.

[0016] According to another aspect of this application, a hair dryer is further provided, including any of the heating components and a blower tubes of the above preferred embodiments, wherein the blower tubes have an air outlet cavity, an air outlet is provided at one axial end of the air outlet cavity, and the heating component is disposed in the air outlet cavity.

[0017] Compared with the prior art, the heating component and hair dryer provided by this utility model have at least one of the following beneficial effects:

[0018] 1. By lowering the middle of the end of the heating frame away from the central axis of the air outlet cavity to form a first recessed groove, the heating wire is fixedly wound around the bottom of the first recessed groove and the outer periphery of the heating wire is located in the inner area of ​​the first recessed groove. This increases the radial distance between the outer periphery of the heating wire and the outer wall of the air outlet cavity, so that an annular air channel is formed between the outer periphery of the heating wire and the outer wall of the air outlet cavity. The cold air entering from the handle can preferentially flow along the annular air channel outside the heating wire, which not only expands the effective ventilation cross section, but also enhances the air volume output of the air outlet area at the top of the hair dryer, thereby significantly improving the heat dissipation conditions, preventing the heating wire from overheating and glowing red, and effectively alleviating the problems of the top of the hair dryer being too hot to touch and the residual temperature being too high.

[0019] 2. The second mounting surface further lowers the height of the outer periphery of the front heating wire, and arranges it in a staggered manner with the outer periphery of the rear heating wire. This further increases the distance between the area of ​​the heating wire that is prone to reddening and the outer wall of the air outlet, increases the air volume at the top of the hair dryer, optimizes the airflow distribution, effectively improves the problem of poor heat dissipation in the reddening area of ​​traditional hair dryers and the problem of the top of the hair dryer getting too hot to touch, and improves the safety and user experience of the hair dryer.

[0020] 3. The limiting grooves on the first and second mounting surfaces are arranged at uniform intervals to ensure that the heating wire is wound in the same position, so that the overall heating component structure is balanced and avoids local overheating or uneven air resistance.

[0021] 4. The ends of the first and third frames respectively abut against the two axial ends of the air outlet cavity, which facilitates the axial fixation of the heating frame; the first and third frames are also provided with a first notch and a second notch at both ends to reduce the overall weight of the heating frame, reduce the cross-section of the heating frame, and increase the air volume of the air outlet cavity. Attached Figure Description

[0022] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0023] Figure 1 It is a cross-sectional view of a hair dryer;

[0024] Figure 2 This is a structural diagram of the heating assembly;

[0025] Figure 3 This is a structural diagram of the heating rack;

[0026] Figure 4 This is a display image of the heating component.

[0027] Explanation of icon numbers:

[0028] Heating assembly 1, heating frame 11, first frame 111, first notch 1111, second frame 112, first recessed groove 1121, second recessed groove 1122, limiting groove 1123, heat dissipation groove 1124, third frame 113, second notch 1131, heating wire 12, outer heat insulation sheet 13, inner heat insulation sheet 14, support base 15, air duct 2, air outlet cavity 20, air outlet 201. Detailed Implementation

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0030] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0031] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0034] refer to Figures 1 to 3 This utility model provides a heating component 1, which is coaxially disposed inside the air outlet cavity 20 of a hair dryer. The heating component 1 includes a heating frame 11 and a heating wire 12. The heating frame 11 is recessed inward at one end away from the central axis of the air outlet cavity 20 to form a first recessed groove 1121. The bottom of the first recessed groove 1121 forms a first mounting surface. The heating wire 12 is fixedly wound around the first mounting surface of the heating frame 11, and the outer periphery of the heating wire 12 is located in the inner area of ​​the first recessed groove 1121, so that an annular air duct is formed between the outer periphery of the heating wire 12 and the cavity wall of the air outlet cavity 20.

[0035] In this embodiment, a first recessed groove 1121 is formed by lowering the middle of one end of the heating frame 11 away from the central axis of the air outlet cavity 20. The heating wire 12 is fixedly wound around the bottom of the first recessed groove 1121 and the outer periphery of the heating wire 12 is located in the inner area of ​​the first recessed groove 1121. This increases the radial distance between the outer periphery of the heating wire 12 and the outer wall of the air outlet cavity 20, so that an annular air channel is formed between the outer periphery of the heating wire 12 and the outer wall of the air outlet cavity 20. The cold airflow entering from the handle can preferentially flow along the annular air channel outside the heating wire, which not only expands the effective ventilation cross section, but also enhances the air volume output of the air outlet area at the top of the hair dryer, thereby significantly improving the heat dissipation conditions, preventing the heating wire 12 from overheating and turning red, and effectively alleviating the problems of the top of the hair dryer being too hot to touch and the residual temperature being too high.

[0036] Specifically, the heating component 1 is coaxially disposed inside the air outlet cavity 20 of the hair dryer to heat the airflow. The heating frame 11 is recessed on the side opposite to the central axis of the air outlet cavity 20 to form a first recessed groove 1121, and the heating wire 12 is fixedly wound around the bottom of the first recessed groove 1121, with the outer periphery of the heating wire 12 completely contained within the recessed area of ​​the first recessed groove 1121, effectively increasing the distance between the outer periphery of the heating wire 12 and the outer wall of the air outlet cavity 20, forming an annular air duct around the outer periphery of the heating wire 12. Specifically, the heating frame 11 includes a first frame 111, a second frame 112, and a third frame 113 arranged sequentially along the axial direction of the air outlet cavity 20. The second frame 112 connects the first frame 111 and the third frame 113. The height of the side of the second frame 112 away from the central axis of the air outlet cavity 20 is lower than the height of the side of the first frame 111 and the second frame 112 away from the central axis of the air outlet cavity 20, so that the side of the second frame 112 away from the central axis of the air outlet cavity 20 forms a first mounting surface. The heating wire 12 is wound around the first mounting surface, and the height of the outer periphery of the heating wire 12 is lower than the height of the side of the first frame 111 and the third frame 113 away from the central axis of the air outlet cavity 20.

[0037] This application alters the relative position of the heating wire 12 and the outer wall of the air outlet cavity 20 by embedding the heating wire 12 within the first recessed groove 1121 of the heating frame 11 and ensuring that the outer periphery of the heating wire 12 is lower than the outer side of the heating frame 11. This creates a new annular airflow channel between the outer periphery of the heating wire 12 and the outer wall of the air outlet cavity 20. This not only expands the effective cross-section of the airflow but also allows the airflow to be more evenly distributed to the air outlet 201 at the top of the hair dryer, reducing the phenomenon of excessive airflow near the handle and insufficient airflow at the top outlet of the hair dryer, thus improving the overall airflow uniformity of the hair dryer.

[0038] Furthermore, the annular airflow channel increases the heat dissipation path, allowing the airflow to cover a larger area of ​​the heating wire 12, carrying away more heat, preventing heat buildup, and lowering the temperature. This effectively prevents the heating wire 12 from glowing red due to heat accumulation, extending the lifespan of the hair dryer, while also improving safety and reducing the risk of burns. During operation, the temperature at the top of the hair dryer is effectively controlled, and the residual temperature is significantly reduced after shutdown. This not only improves user comfort but also enhances the overall performance and reliability of the product, providing users with a safer and more comfortable hair drying experience.

[0039] Furthermore, the second frame 112 is recessed inward on the side opposite to the central axis of the air outlet cavity 20 to form a second recessed groove 1122. The second recessed groove 1122 is located on the side of the second frame 112 near the air outlet 201 of the air outlet cavity 20. The bottom of the second recessed groove 1122 forms a second mounting surface. The height of the second mounting surface is lower than the height of the first mounting surface. At least part of the heating wire 12 is wound around the second mounting surface and the outer periphery of this part of the heating wire 12 is lower than the outer periphery of the other part of the heating wire 12.

[0040] In this embodiment, the height of the outer periphery of the front heating wire 12 is further lowered by the second mounting surface, and it is arranged in a staggered manner with the outer periphery of the rear heating wire 12. This further increases the distance between the area of ​​the heating wire 12 that is prone to reddening and the outer wall of the air outlet cavity 20, increases the air volume at the top of the hair dryer, optimizes the airflow distribution, effectively improves the problem of poor heat dissipation in the reddening area of ​​traditional hair dryers and the problem of the top of the hair dryer being too hot to touch, and improves the safety and user experience of the hair dryer.

[0041] Specifically, since the red glow of the heating wire 12 is mainly concentrated at the air outlet of the blower, that is, the red glow is more severe in the front section of the heating wire 12 near the air outlet, a second recessed groove 1122 is added to the first mounting surface of the second frame 112 near the air outlet 201. The bottom of the groove at the front end of the second frame 112 is further lowered to form a lower second mounting surface. At this time, the second mounting surface is lower than the first mounting surface, causing the front section of the heating wire 12 to sink further. There is a height difference between the outer periphery of the front section of the heating wire 12 and the outer periphery of the rear section of the heating wire 12, that is, the front section of the heating wire 12... The front heating wire 12 and the rear heating wire 12 are arranged in a staggered manner, and the radial distance between the front heating wire 12 and the outer wall of the air outlet cavity 20 is larger. This further increases the distance between the easily reddened area of ​​the heating wire 12 and the outer wall of the air outlet cavity 20, and also expands the ventilation cross section of the annular air duct at this location. This increases the air volume at the top of the hair dryer, optimizes the airflow distribution, and allows the airflow to preferentially flow through the reddened area to carry away heat, reducing heat accumulation in the reddened area and lowering the temperature at the top of the hair dryer. This effectively improves the problem of poor heat dissipation in the reddened area and the hot top of the hair dryer in traditional hair dryers, and enhances the safety and user experience of the hair dryer.

[0042] It is worth noting that both the first mounting surface and the second mounting surface are planes extending axially along the air outlet cavity 20. Preferably, the first mounting surface and the second mounting surface have equal axial lengths in the air outlet cavity 20 to balance structural stability and heat dissipation efficiency, further optimizing the layout and heat dissipation performance of the heating wire 12. This ensures uniform heat distribution of the heating wire 12 during operation, simplifies the manufacturing process, optimizes the airflow distribution inside the hair dryer, avoids excessive heat accumulation in the red-hot area, effectively reduces the temperature at the top of the hair dryer, and improves user safety and comfort.

[0043] Furthermore, the first mounting surface and the second mounting surface are respectively provided with a plurality of limiting grooves 1123 spaced apart along the axial direction of the air outlet cavity 20, and the heating wire 12 is correspondingly embedded in the limiting groove 1123.

[0044] In this embodiment, the limiting grooves 1123 on the first mounting surface and the second mounting surface are arranged at a uniform interval to ensure that the heating wire 12 is wound in the same position, so that the overall heating assembly 1 is structurally balanced and avoids local overheating or uneven wind resistance.

[0045] Furthermore, the top of the end of the first frame 111 away from the third frame 113 is adapted to abut and be fixed to one axial end of the air outlet cavity 20, and the bottom of the end of the first frame 111 away from the third frame 113 is also provided with a first notch 1111; and / or, the bottom of the end of the third frame 113 away from the first frame 111 is adapted to abut and be fixed to the other axial end of the air outlet cavity 20, and the top of the end of the third frame 113 away from the first frame 111 is also provided with a second notch 1131.

[0046] In this embodiment, the ends of the first frame 111 and the third frame 113 respectively abut against the two axial ends of the air outlet cavity 20, which facilitates the axial fixation of the heating frame 11; the first frame 111 and the third frame 113 are also provided with a first notch 1111 and a second notch 1131 at both ends, which reduces the overall weight of the heating frame 11, reduces the cross-section of the heating frame 11, and increases the air volume of the air outlet cavity 20.

[0047] Specifically, the end of the first frame 111 away from the third frame 113, that is, the end closer to the air inlet, has a first abutment surface formed on its top. The outline of the first abutment surface is adapted to the internal outline of the corresponding end of the air outlet cavity 20, and is suitable for tightly abutting and fixing to one axial end of the air outlet cavity 20.

[0048] At the other end of the heating frame 11, the end of the third frame 113 away from the first frame 111, i.e., the end away from the air outlet 201, has a second abutment surface at its bottom. This second abutment surface also cooperates with the internal structure of the corresponding end of the air outlet cavity 20, and is suitable for abutting and fixing to the other axial end of the air outlet cavity 20. This achieves bidirectional positioning and support of the heating frame 11 within the air outlet cavity 20, ensuring accurate positioning and firm installation of the heating frame 11 in the axial direction, and guaranteeing its operational stability.

[0049] At the same end of the first frame 111, a first notch 1111 is formed inwardly at its bottom. At the top of the same end of the third frame 113, a second notch 1131 is also formed inwardly. The first notch 1111 and the second notch 1131 serve to reduce weight, optimize airflow channels, and facilitate installation and connection with the inner heat insulation sheet 14 and the outer heat insulation sheet 13.

[0050] Preferably, refer to Figure 2 and Figure 4It also includes an outer heat insulation sheet 13 and an inner heat insulation sheet 14. The outer heat insulation sheet 13 is disposed on the outer side wall of the air outlet cavity 20, and the inner heat insulation sheet 14 is disposed on the inner side wall of the air outlet cavity 20. The first frame 111 and the third frame 113 are adapted to abut and be fixed to the outer heat insulation sheet 13 at the ends opposite to the central axis of the air outlet cavity 20, and the ends of the first frame 111 and the third frame 113 near the central axis of the air outlet cavity 20 are adapted to abut and be fixed to the inner heat insulation sheet 14. Through the cooperation of the inner and outer double-layer heat insulation sheets, the heating frame 11 is prevented from shifting, and heat is further blocked from being transferred to the casing, thereby improving the heat insulation effect and improving the temperature rise of the blower.

[0051] Specifically, the outer heat insulation sheet 13 is provided with several snap-fit ​​grooves on the side away from the air outlet 201, and the third frame 113 is adapted to be snapped and fixed in the snap-fit ​​groove at the end opposite to the central axis of the air outlet cavity 20. The inner heat insulation sheet 14 is also provided with several snap-fit ​​grooves on the side near the air outlet 201, and the first frame 111 is adapted to be snapped and fixed in the snap-fit ​​groove at the end opposite to the central axis of the air outlet cavity 20, thereby securing the heating frame 11 between the outer heat insulation sheet 13 and the inner heat insulation sheet 14.

[0052] Preferably, it also includes a support base 15, which is disposed at one end of the inner heat insulation sheet 14 away from the air outlet 201 of the air outlet cavity 20, and the heating frame 11 is disposed axially between the inner wall of the air outlet cavity 20 and the support base 15.

[0053] Specifically, the first frame 111 and the third frame 113 of the heating frame 11 abut against the inner heat insulation plate 14 and the outer heat insulation plate 13 at their radial ends in the air outlet cavity 20, respectively; the support base 15 is disposed at the end of the inner heat insulation plate 14 away from the air outlet 201, and the heating frame 11 is disposed axially between the inner wall of the air outlet cavity 20 and the support base 15. The support base 15 is also provided with several locking grooves at intervals in the circumference of the air outlet cavity 20, and the side of the third frame 113 near the central axis of the air outlet cavity 20 is suitable for locking and fixing in the locking groove of the support base 15 to form a more solid fixing structure for the heating frame 11.

[0054] Furthermore, the heating rack 11 is also recessed inward on one side near the central axis of the air outlet cavity 20, and the heat dissipation groove 1124 corresponds to the first mounting surface and the second mounting surface.

[0055] In this embodiment, by adding a heat dissipation groove 1124 to the inner side of the heating frame 11, the heat dissipation area is further expanded, the air flow in the inner cavity is enhanced, and the convective heat transfer effect is improved. The heat dissipation groove 1124 works in conjunction with the outer annular air duct to form a "double-sided heat dissipation" structure, which significantly reduces the temperature of the heating frame 11 and the heating wire 12.

[0056] Specifically, by setting a heat dissipation groove 1124 on one side near the central axis of the air outlet cavity 20, corresponding to the first and second mounting surfaces, a highly efficient "double-sided heat dissipation" structure is formed. The heat dissipation groove 1124 not only further increases the radial distance between the outer periphery of the heating wire 12 and the outer wall of the air outlet cavity 20, expanding the heat dissipation area, but also optimizes the airflow path of the inner cavity, greatly improving the convective heat transfer effect. The heat dissipation groove 1124 on the inner side guides cold air deep into the inner side of the heating component 1, directly contacting the heating point of the heating wire 12, and quickly removing heat; the annular air duct on the outer side continuously exhausts heat outward. The two work together to significantly reduce the temperature of the heating frame 11 and the heating wire 12, effectively solving the problem of overheating of the head of the traditional hair dryer, and bringing users a safer and more comfortable user experience. Preferably, the heat dissipation groove 1124 is a single piece, and its axial length is the sum of the axial lengths of the first and second mounting surfaces, that is, the heat dissipation groove 1124 is formed at the bottom of the second frame 112. The heat dissipation groove 1124 is located at the bottom of the second frame 112, meaning that the side of the second frame 112 closest to the central axis of the air outlet cavity 20 is lower than the sides of the first frame 111 and the third frame 113 closest to the central axis of the air outlet cavity 20, causing the bottom of the heating frame 11 to be recessed inward to form the heat dissipation groove 1124. Furthermore, the bottom of the heat dissipation groove 1124 can also match the first mounting surface and the second mounting surface; that is, if the top of the second frame 112 is stepped, the bottom of the second frame 112 is also stepped, making the second frame 112 as a whole stepped structure.

[0057] Further, refer to Figure 1 This application provides a hair dryer, including a heating assembly 1 and a blower 2. The blower 2 has an air outlet cavity 20, and an air outlet 201 is provided at one axial end of the air outlet cavity 20. The heating assembly 1 includes the heating assembly 1 in any of the above embodiments. The air outlet cavity 20 is an annular channel, and the heating assembly 1 is disposed inside the air outlet cavity 20. The outer heat insulation plate 13 of the heating assembly 1 abuts against the outer side wall of the air outlet cavity 20, and the inner heat insulation plate 14 abuts against the inner side wall of the air outlet cavity 20. The heating frame 11 is disposed between the outer heat insulation plate 13 and the inner heat insulation plate 14.

[0058] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A heating assembly, said heating assembly being coaxially disposed inside the air outlet cavity of a hair dryer, characterized in that, Includes heating frame and heating wire; The heating frame has a first recessed groove formed at one end opposite to the central axis of the air outlet cavity. The bottom of the first recessed groove forms a first mounting surface. The heating wire is fixedly wound around the first mounting surface of the heating frame, and the outer periphery of the heating wire is located in the inner area of ​​the first recessed groove, so that an annular air duct is formed between the outer periphery of the heating wire and the cavity wall of the air outlet cavity.

2. A heating assembly according to claim 1, characterized in that, The heating frame includes a first frame, a second frame, and a third frame arranged sequentially along the axial direction of the air outlet cavity. The second frame connects the first frame and the third frame. The height of the side of the second frame away from the central axis of the air outlet cavity is lower than the height of the side of the first frame away from the central axis of the air outlet cavity, so that the side of the second frame away from the central axis of the air outlet cavity forms the first mounting surface.

3. A heating assembly according to claim 2, characterized in that, The second frame is recessed inward on the side opposite to the central axis of the air outlet cavity to form a second recessed groove. The second recessed groove is located on the side of the second frame near the air outlet cavity. The bottom of the second recessed groove forms a second mounting surface. The height of the second mounting surface is lower than the height of the first mounting surface. At least a portion of the heating wire is wound around the second mounting surface, and the outer periphery of this portion of the heating wire is lower than the outer periphery of the other portion of the heating wire.

4. A heating assembly according to claim 3, characterized in that, The first mounting surface and the second mounting surface have the same axial length in the air outlet cavity.

5. A heating assembly according to claim 3, characterized in that, The first mounting surface and the second mounting surface are respectively provided with a plurality of limiting grooves spaced apart along the axial direction of the air outlet cavity, and the heating wire is correspondingly embedded in the limiting groove.

6. A heating assembly according to claim 2, characterized in that, The top of the first frame at the end away from the third frame is adapted to abut against and be fixed to one axial end of the air outlet cavity, and the bottom of the first frame at the end away from the third frame is also provided with a first notch; And / or, the bottom of the third frame at one end away from the first frame is adapted to abut against and be fixed to the other end of the air outlet cavity along the axial direction, and the top of the third frame at one end away from the first frame is also provided with a second notch.

7. A heating assembly according to claim 2, characterized in that, It also includes an outer heat insulation sheet and an inner heat insulation sheet, wherein the outer heat insulation sheet is disposed on the outer side wall of the air outlet cavity, and the inner heat insulation sheet is disposed on the inner side wall of the air outlet cavity; The first frame and the third frame are adapted to abut against and be fixed to the outer heat insulation sheet at the end opposite to the central axis of the air outlet cavity, and the first frame and the third frame are adapted to abut against and be fixed to the inner heat insulation sheet at the end near the central axis of the air outlet cavity.

8. A heating assembly according to claim 7, characterized in that, It also includes a support base, which is disposed at the end of the inner heat insulation sheet away from the air outlet of the air outlet cavity, and the heating frame is disposed between the inner wall of the air outlet cavity and the support base along the axial direction of the air outlet cavity.

9. A heating assembly according to claim 3, characterized in that, The heating rack is also recessed inward on one side near the central axis of the air outlet cavity, and the heat dissipation groove corresponds to the first mounting surface and the second mounting surface.

10. A hair dryer, characterized in that, The device includes the heating assembly and the air duct as described in any one of claims 1-9, wherein the air duct has an air outlet cavity, an air outlet is provided at one axial end of the air outlet cavity, and the heating assembly is disposed inside the air outlet cavity.

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