Novel air duct

Abstract

The utility model discloses a novel air duct which comprises a handle, a fan assembly and a heating device, the handle is provided with an air inlet, an air outlet and an air duct communicated with the air inlet and the air outlet, the air outlet is located at one end of the handle, and an accessory connecting structure is further arranged at the end, provided with the air outlet, of the handle; the fan assembly is arranged in the air duct; the heating device comprises a silicon carbide heating body arranged in the air duct, and a heat exchange surface is formed on the surface of the silicon carbide heating body so as to exchange heat with airflow flowing through the air duct. According to the technical scheme, the overall size of the novel air duct can be reduced, and a user can hold, use and store the novel air duct conveniently.

Description

Technical Field

[0001] The utility model relates to the field of hair drying devices, in particular to a novel hair dryer. Background Art

[0002] At present, hair dryers have become personal care products frequently used in daily life, mainly used for hair drying and hair styling, etc. At present, there is a new type of hair dryer, which is mainly composed of a handle and an accessory (such as a nozzle) detachably mounted on one end of the handle. The handle is provided with a heating device, a blower and an electric control device, and different usage requirements can be achieved by replacing different accessories. In the heating device of a traditional hair dryer, a heating wire wound on an insulating bracket is generally used for heating. During production, the heating wire and the insulating bracket need to be manufactured separately, and then the heating wire is wound on the insulating bracket. Such a heating device has a complex structure and a large size. When such a heating device is used, the handle size of the above-mentioned new hair dryer will be larger. Utility Model Content

[0003] The main purpose of the utility model is to provide a novel air duct, aiming to simplify the structure of the heating device and reduce the size of the novel air duct.

[0004] In order to achieve the above-mentioned purpose, the novel air duct proposed by the utility model comprises:

[0005] A handle, provided with an air inlet, an air outlet and an air duct connecting the air inlet and the air outlet, the air outlet being located at one end of the handle, and an accessory connection structure being also provided at the end of the handle provided with the air outlet;

[0006] a fan assembly, disposed in the air duct; and

[0007] The heating device comprises a silicon carbide heating element arranged in the air duct, wherein the surface of the silicon carbide heating element forms a heat exchange surface for heat exchange with the air flow passing through the air duct.

[0008] Optionally, the accessory connecting structure is rotatably mounted at the air outlet, and the novel air duct further comprises a driving mechanism, which is disposed in the air duct and is transmission-connected to the accessory connecting structure for driving the accessory connecting structure to rotate.

[0009] Optionally, the novel air duct further comprises a driving mechanism, wherein the driving mechanism is disposed in the air duct and has a transmission shaft extending to the air outlet, wherein the transmission shaft is used to connect an air outlet accessory to drive the air outlet accessory to rotate.

[0010] Optionally, the novel hair duct further comprises an air outlet accessory, and the air outlet accessory is detachably connected to the accessory connecting structure.

[0011] Optionally, the air outlet accessory is an air nozzle; or, the air outlet accessory is a comb head, and a plurality of comb teeth and a plurality of air flow outlets are provided on the periphery of the comb head.

[0012] Optionally, the silicon carbide heating element as a whole is a columnar structure extending along the length direction of the air duct.

[0013] Optionally, the silicon carbide heating element comprises a spiral body and at least two connection parts, the connection parts are provided at both ends of the spiral body, and a ventilation gap is formed between two adjacent spiral segments of the spiral body;

[0014] Optionally, the silicon carbide heating element comprises a first heating segment and two second heating segments, the first heating segment is connected between the two second heating segments, the two second heating segments both extend outwardly in a spiral from the first heating segment, a ventilation gap is formed between the two second heating segments, and a wiring portion is provided at the free end of each second heating segment;

[0015] Optionally, the silicon carbide heating element comprises an outer ring portion, a central portion located within the outer ring portion, and a plurality of connecting portions connected between the central portion and the outer ring portion, the plurality of connecting portions are spaced apart along the circumference of the central portion or the plurality of connecting portions are staggered and connected, a ventilation gap is formed between two adjacent connecting portions, the outer ring portion and the central portion are respectively provided with a wiring portion; the central portion is provided with a plurality of airflow holes, and the extension direction of the airflow holes is consistent with the flow direction of the airflow in the air duct;

[0016] Optionally, the silicon carbide heating element is provided with a plurality of air flow holes, the air flow holes are arranged through both ends, the extension direction of the air flow holes is consistent with the flow direction of the air flow in the air duct, and the outer side and the central area of ​​the silicon carbide heating element are respectively provided with wiring parts;

[0017] Optionally, the silicon carbide heating element includes a plurality of heating segments connected in sequence, and any two adjacent heating segments are arranged at an angle, and a ventilation gap is formed between any two heating segments.

[0018] Optionally, the silicon carbide heating element is arranged between the air outlet and the fan assembly.

[0019] Optionally, the novel hair duct further includes a circuit assembly, and the fan assembly and the silicon carbide heating element are both electrically connected to the circuit assembly; the circuit assembly is located between the silicon carbide heating element and the fan assembly, or the circuit assembly is located on a side of the fan assembly away from the silicon carbide heating element.

[0020] Optionally, the novel hair dryer further comprises a heat insulating component, wherein the heat insulating component is disposed in the handle and surrounds the circumference of the silicon carbide heating element.

[0021] Optionally, a protective net is provided at the air outlet.

[0022] The technical solution of the utility model adopts a silicon carbide heating element, so that the surface of the silicon carbide heating element is used as a heat exchange surface to directly exchange heat with the airflow flowing through the air duct. The silicon carbide heating element has a high thermal efficiency and can quickly generate heat, so that the outlet airflow can be quickly heated. Compared with the transmission electric heating wire heating device, the silicon carbide heating element is an integrated structure with a simple structure and a small size. While ensuring the heating effect, it can reduce the space occupied in the handle. When the fan assembly and the heating device are arranged in the handle at the same time, the size of the handle can also be made smaller, which is conducive to reducing the overall size of the new hair dryer and is convenient for users to hold, use and store. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is a structural schematic diagram of an embodiment of the new type of hair dryer of the utility model;

[0025] Figure 2 for Figure 1 A cross-sectional view of the new type of air duct;

[0026] Figure 3 for Figure 1 Schematic diagram of the structure of the new type of air duct equipped with air outlet accessories;

[0027] Figure 4 This is a structural schematic diagram of another air outlet accessory in an embodiment of the new type of hair dryer of the utility model;

[0028] Figure 5 This is a structural schematic diagram of another air outlet accessory in an embodiment of the new type of air duct of the utility model;

[0029] Figure 6 A cross-sectional view of another embodiment of the novel air duct of the utility model;

[0030] Figure 7 A cross-sectional view of another embodiment of the novel air duct of the utility model;

[0031] Figure 8 for Figure 1 Schematic diagram of the structure of the silicon carbide heating element;

[0032] Fig. 9 for Figure 8 A schematic diagram of the structure of the silicon carbide heating element from another angle;

[0033] Fig.10 This is a schematic diagram of the structure of a silicon carbide heating element in another embodiment of the new type of air duct of the utility model;

[0034] Fig.11 This is a schematic structural diagram of a silicon carbide heating element in another embodiment of the subject of the utility model;

[0035] Fig.12 This is a schematic structural diagram of a silicon carbide heating element in yet another embodiment of the subject of the utility model;

[0036] Fig.13 This is a schematic structural diagram of a silicon carbide heating element in yet another embodiment of the subject of the utility model;

[0037] Fig.14 This is a schematic structural diagram of a silicon carbide heating element in yet another embodiment of the subject of the utility model.

[0038] Description of Figure Numbers:

[0039] 10. Handle; 11. Air inlet; 12. Air outlet; 13. Air duct; 14. Accessory connection structure; 15. Protective net; 20. Fan assembly; 30. Silicon carbide heating element; 301. Ventilation gap; 302. Air flow hole; 31. First heating section; 32. Second heating section; 33. Heating section; 34. Outer ring; 35. Center; 36. Connection section; 37. Wiring section; 38. Convex rib; 40. Circuit assembly; 50. Heat insulation component; 60. Air outlet accessories; 70. Driving mechanism; 71. Transmission shaft

[0040] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0044] The utility model provides a novel air duct.

[0045] In the embodiment of the present utility model, Figures 1 to 6 As shown, the new hair dryer includes a handle 10, a fan assembly 20 and a heating device. The handle 10 is provided with an air inlet 11, an air outlet 12 and an air duct 13 connecting the air inlet 11 and the air outlet 12. The air outlet 12 is located at one end of the handle 10, and the end of the handle 10 where the air outlet 12 is located is also provided with an accessory connection structure 14.

[0046] The fan assembly 20 is disposed in the air duct 13 . The heating device includes a silicon carbide heating element 30 disposed in the air duct 13 . The surface of the silicon carbide heating element 30 forms a heat exchange surface for heat exchange with the airflow flowing through the air duct 13 .

[0047] Specifically, the new wind tube also includes a circuit assembly 40, the fan assembly 20 and the heating device (silicon carbide heating element 30) are electrically connected to the circuit assembly 40, and the circuit assembly 40 has a circuit structure such as a controller and a power supply circuit. The specific circuit structure can refer to the prior art, and the utility model will not repeat it one by one. Optionally, the circuit assembly 40 is also provided with a power cord, and the power cord is connected to an external power supply; or the circuit assembly 40 is provided with a power interface, and the power interface is used to connect the power cord.

[0048] When in use, the required air outlet accessories 60 (such as air nozzles) can be installed on the accessory connection structure 14, so that the channel of the air outlet accessories 60 is connected with the air outlet 12, that is, the airflow blown out from the air outlet 12 can enter the channel of the air outlet accessories 60, and then blown out from the airflow outlet of the air outlet accessories 60, so that different air outlet forms can be achieved through different air outlet accessories 60. It can also be used without installing the air outlet accessories 60, that is, the airflow directly blown out from the air outlet 12 can be used to dry water stains on the desktop, clothes or hair, etc.

[0049] Optionally, the air inlet 11 is provided at one end of the handle 10 away from the air outlet 12. The air inlet 11 is provided at least on the end surface and the peripheral side of the handle 10. That is, the air inlet 11 can be provided on the peripheral side of the handle 10, the air inlet 11 can be provided on the end surface of the handle 10, or the air inlet 11 can be provided on both the peripheral side and the end surface of the handle 10. Optionally, the handle 10 is long and straight as a whole.

[0050] The silicon carbide heating element 30 is a heating structure as a whole, that is, there are at least two spaced connection parts 37 on the silicon carbide heating element 30, and the power supply circuit is connected through at least two connection parts 37. After the power is turned on, the current flows through the silicon carbide heating element 30, thereby converting the electrical energy into thermal energy. When the airflow flows through the surface of the silicon carbide heating element 30, the airflow can be heat-exchanged with the silicon carbide heating element 30, so that the airflow flowing through the silicon carbide heating element 30 can be heated. Compared with the electric heating wire, even if the new type of air duct is used for a long time, it will not cause the silicon carbide heating element 30 to be disconnected. The surface of the silicon carbide heating element 30 refers to the surface of the silicon carbide heating element 30 that is exposed to the air and can contact the airflow, including the gap wall formed by the silicon carbide heating element 30 and the inner wall of the through hole.

[0051] The silicon carbide heating element 30 can be made by mixing silicon carbide powder as the main sintering phase raw material with one or more conductive phase raw materials of titanium nitride powder, zirconium nitride powder, titanium carbonitride powder, titanium carbide powder, zirconium carbide powder, thallium carbide powder, hafnium carbide powder, titanium boride powder, zirconium boride powder, molybdenum silicide powder and tungsten carbide powder, and then molding and sintering according to the designed shape. For example, silicon carbide powder, yttrium oxide powder, aluminum oxide powder and titanium boride powder can be uniformly mixed in a certain mass ratio, and then water is added as a solvent, and a ball mill is used to uniformly mix, and then spray dried, and the dry powder and paraffin are heated and mixed in a certain mass ratio, and poured into a hot die casting machine to complete hot die casting. After the blank is dried, it is placed in a sintering furnace for sintering to obtain the silicon carbide heating element 30.

[0052] The technical solution of the utility model adopts a silicon carbide heating element 30, so that the surface of the silicon carbide heating element 30 is used as a heat exchange surface to directly exchange heat with the airflow flowing through the air duct 13. The silicon carbide heating element 30 has a high thermal efficiency and can quickly generate heat, so that the outlet airflow can be quickly heated. Compared with the transmission electric heating wire heating device, the silicon carbide heating element 30 is an integrated structure with a simple structure and a small size. While ensuring the heating effect, it can reduce the space occupied in the handle 10. When the fan assembly 20 and the heating device are simultaneously arranged in the handle 10, the size of the handle 10 can also be made smaller, which is conducive to reducing the overall size of the new hair dryer and is convenient for users to hold, use and store.

[0053] In some embodiments, the novel hair dryer further comprises a driving mechanism 70, which is arranged in the air duct 13 and is transmission-connected with the accessory connection structure 14 to drive the accessory connection structure 14 to rotate. That is, when the driving mechanism 70 is driven, the accessory connection structure 14 can be driven to rotate relative to the handle 10 by the driving mechanism 70, so that when the air outlet accessory 60 is installed on the accessory connection structure 14, the air outlet accessory 60 can be driven to rotate together for use. For example, when the air outlet accessory 60 is a comb head with comb teeth on the outer circumference, the hair can be combed by driving the air outlet accessory 60 to rotate. Optionally, the accessory connection structure 14 is cylindrical and rotatably mounted on the outside of the handle 10, and the driving mechanism 70 comprises a motor and a transmission mechanism (for example, a driving gear arranged on the motor shaft and a transmission tooth arranged on the inner circumference of the accessory connection structure 14), and the motor is transmission-connected with the accessory connection structure 14 through the transmission mechanism. Alternatively, the accessory connection structure 14 is cylindrical and rotatably mounted on the end of the handle 10. Optionally, the motor is located on the side of the silicon carbide heating element 30 away from the air inlet 11, and the accessory connection structure 14 extends to the motor or the motor is provided with a transmission shaft 71 that passes through the silicon carbide heating element 30 and is connected to the accessory connection structure 14. Alternatively, the motor is located between the silicon carbide heating element 30 and the air outlet 12, and a heat insulation layer is provided on the outside of the motor.

[0054] In addition, in some other embodiments, the new type of hair dryer also includes a driving mechanism 70, which is arranged in the air duct 13 and has a transmission shaft 71 extending to the air outlet 12, and the transmission shaft 71 is used to connect the air outlet accessory 60 to drive the air outlet accessory 60 to rotate. That is, the accessory connection structure 14 is fixed to the end of the handle 10, and the air outlet accessory 60 is rotatably mounted on the accessory connection structure 14 and docked with the transmission shaft 71, so that the air outlet accessory 60 can be driven to rotate by the transmission shaft 71. Optionally, the motor is located on the side of the silicon carbide heating element 30 away from the air inlet 11, and the silicon carbide heating element 30 is provided with a through hole, and the transmission shaft 71 extends to the air outlet 12 through the through hole; or the motor is located between the silicon carbide heating element 30 and the air outlet 12, and a heat insulation layer is provided on the outside of the motor.

[0055] In some embodiments, the new hair dryer further includes an air outlet accessory 60, which is detachably connected to the accessory connection structure 14. In this way, the user can rotate and install the air outlet accessory 60 for use as needed, thereby increasing the application scenarios of the new hair dryer.

[0056] The air outlet accessory 60 may be in various forms. For example, in some embodiments, the air outlet accessory 60 is an air nozzle, such as a diffuser, a collector, or an anti-flying nozzle. In other embodiments, the air outlet accessory 60 is a comb head, and a plurality of comb teeth and a plurality of air flow outlets are provided on the periphery of the comb head, and the air flow outlets are located between the comb teeth. Comb teeth and air flow outlets may be provided on only one side or two opposite sides of the periphery of the comb head, or comb teeth and air flow outlets may be provided on the outer periphery of the comb head.

[0057] In some embodiments, the silicon carbide heating element 30 is disposed between the air outlet 12 and the fan assembly 20. This makes the silicon carbide heating element 30 closer to the air outlet 12, which can reduce the flow path of the hot air flow heated by the silicon carbide heating element 30 in the air duct 13, which is conducive to reducing heat loss. In addition, it can prevent the hot air flow from passing through the fan assembly 20, which can prevent the fan assembly 20 from overheating, and can also better dissipate heat for the fan assembly 20.

[0058] In some embodiments, reference Figure 6 , the circuit assembly 40 is located between the silicon carbide heating element 30 and the fan assembly 20, or, referring to Figure 2 The circuit assembly 40 is located on the side of the fan assembly 20 away from the silicon carbide heating element 30. This arrangement can prevent the hot air flow from passing through the fan assembly 20 and the circuit assembly 40, and can also better dissipate heat for the fan assembly 20 and the circuit assembly 40.

[0059] In some embodiments, the new hair dryer also includes a heat-insulating component 50, which is disposed in the handle 10 and surrounds the circumference of the silicon carbide heating element 30; this can reduce the heat conduction of the silicon carbide heating element 30 to the outer surface of the handle 10, which is beneficial to reduce heat loss and prevent the handle 10 from overheating and scalding the user or causing discomfort during use. Among them, the heat-insulating component 50 is formed in a cylindrical shape, and a channel with two ends through it is formed inside. The silicon carbide heating element 30 is disposed in the channel, and its material can be ABS plastic, PP plastic or thermal insulation foam, etc. Among them, the heat-insulating component 50 is formed in a cylindrical shape, and a channel with two ends through it is formed inside. The silicon carbide heating element 30 is disposed in the channel, and its material can be ABS plastic, PP plastic or thermal insulation foam, etc.

[0060] In some embodiments, a convex rib 38 is provided on the outer circumference of the silicon carbide heating element 30, and a slot is provided in the heat insulating component 50, the slot extends along the axial direction of the heat insulating component 50, and the convex rib 38 is correspondingly inserted into the slot. Specifically, the slot extends to one end of the heat insulating component 50 or the end of the slot close to one end of the heat insulating component 50 is open, so that the silicon carbide heating element 30 can be installed into the heat insulating component 50 from one end of the heat insulating component 50 in a state where the convex rib 38 corresponds to the slot.

[0061] In some embodiments, a protective net 15 is provided at the air outlet 12. This can prevent foreign matter from entering the air duct 13 even when the air outlet accessory 60 is not installed, and can also prevent users from accidentally inserting their fingers into the air duct 13 and getting burned.

[0062] The specific structure of the silicon carbide heating element 30 can be various, for example, Figure 8 and Fig. 9In some embodiments, the silicon carbide heating element 30 includes a spiral body and at least two connection parts 37, both ends of the spiral body are provided with connection parts 37, and a ventilation gap 301 is formed between two adjacent spiral sections of the spiral body. With such a configuration, the surface area of ​​the silicon carbide heating element 30 can be larger under the same volume, and the contact area with the airflow can be increased, thereby improving the heat exchange efficiency. Among them, the silicon carbide heating element 30 can be a planar spiral structure or a tower-shaped spiral structure.

[0063] Optionally, the silicon carbide heating element 30 includes a first heating section 31 and two second heating sections 32, the first heating section 31 is connected between the two second heating sections 32, the two second heating sections 32 both extend outwardly in a spiral from the first heating section 31, a ventilation gap 301 is formed between the two second heating sections 32, and a wiring portion 37 is provided at the free end of each second heating section 32. That is, the two second heating sections 32 extend outwardly in a spiral from the first heating section 31 in parallel, so that the free ends of the two second heating sections 32 are both located on the outside, that is, the wiring portions 37 of the silicon carbide heating element 30 are both located on the outside, which makes it easier to connect the wiring while increasing the heat exchange area by utilizing the spiral structure.

[0064] In some other embodiments, reference Fig.10 The silicon carbide heating element 30 includes a plurality of heating segments 33 connected in sequence, and each of the two adjacent heating segments 33 is arranged at an angle, and a ventilation gap 301 is formed between any two heating segments 33. That is, the plurality of heating segments 33 form a bending structure according to a certain rule, so that the heat exchange area of ​​the silicon carbide heating element 30 can be increased.

[0065] In some other embodiments, reference Fig.11 The silicon carbide heating element 30 is provided with a plurality of air flow holes 302, and the air flow holes 302 are through-set at both ends. The extension direction of the air flow holes 302 is consistent with the flow direction of the air flow in the air duct 13, and the outer side and the central area of ​​the silicon carbide heating element 30 are respectively provided with connection parts 37.

[0066] In some other embodiments, reference Fig.12 The silicon carbide heating element 30 includes an outer ring portion 34, a central portion 35 located inside the outer ring portion 34, and a plurality of connecting portions 36 connected between the central portion 35 and the outer ring portion 34. A ventilation gap 301 is formed between two adjacent connecting portions 36. The outer ring portion 34 and the central portion 35 are respectively provided with a wiring portion 37. Optionally, the plurality of connecting portions 36 are spaced apart along the circumference of the central portion 35 (refer to Fig.12 ); or multiple connecting portions 36 are staggeredly connected (reference Fig.13 or Fig.14 ).

[0067] Optionally, the central portion 35 is provided with a plurality of airflow holes, and the extension direction of the airflow holes is consistent with the airflow direction in the air duct 13. This can also make the heat exchange area of ​​the silicon carbide heating element 30 larger, and can improve the heat exchange efficiency.

[0068] In some embodiments, the silicon carbide heating element 30 is in a cylindrical structure extending along the length direction of the air duct 13. That is, the silicon carbide heating element 30 has a certain height. Such a configuration can increase the length of the ventilation gap 301 / air flow hole 302 in the silicon carbide heating element 30, that is, the surface area of ​​the silicon carbide heating element 30 can be increased, the heat exchange area of ​​the silicon carbide heating element 30 is increased, and the heat exchange efficiency is improved.

[0069] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A new type of air duct, characterized in that: include: A handle, provided with an air inlet, an air outlet and an air duct connecting the air inlet and the air outlet, the air outlet being located at one end of the handle, and an accessory connection structure being also provided at the end of the handle provided with the air outlet; a fan assembly, disposed in the air duct; and The heating device comprises a silicon carbide heating element arranged in the air duct, wherein the surface of the silicon carbide heating element forms a heat exchange surface for heat exchange with the air flow passing through the air duct.

2. The novel hair dryer as claimed in claim 1, characterized in that: The accessory connection structure is rotatably mounted at the air outlet. The novel air duct also includes a driving mechanism, which is arranged in the air duct and is transmission-connected to the accessory connection structure to drive the accessory connection structure to rotate.

3. The novel hair dryer as claimed in claim 1, characterized in that: The novel air duct also includes a driving mechanism, which is arranged in the air duct and has a transmission shaft extending to the air outlet, and the transmission shaft is used to connect an air outlet accessory to drive the air outlet accessory to rotate.

4. The novel hair dryer according to any one of claims 1 to 3, characterized in that: The novel hair dryer also includes an air outlet accessory, and the air outlet accessory is detachably connected to the accessory connecting structure.

5. The novel hair dryer as claimed in claim 4, characterized in that: The air outlet accessory is an air nozzle; or, the air outlet accessory is a comb head, and a plurality of comb teeth and a plurality of air flow outlets are arranged around the comb head.

6. The novel hair dryer as claimed in claim 1, characterized in that: The silicon carbide heating element is in a columnar structure extending along the length direction of the air duct as a whole.

7. The novel hair dryer as claimed in claim 1, characterized in that: The silicon carbide heating element comprises a spiral body and at least two connection parts, both ends of the spiral body are provided with the connection parts, and a ventilation gap is formed between two adjacent spiral sections of the spiral body; Alternatively, the silicon carbide heating element comprises a first heating segment and two second heating segments, the first heating segment is connected between the two second heating segments, the two second heating segments both extend outwardly in a spiral from the first heating segment, a ventilation gap is formed between the two second heating segments, and a wiring portion is provided at the free end of each second heating segment; Alternatively, the silicon carbide heating element comprises an outer ring portion, a central portion located within the outer ring portion, and a plurality of connecting portions connected between the central portion and the outer ring portion, wherein the plurality of connecting portions are spaced apart along the circumference of the central portion or are staggeredly connected, and a ventilation gap is formed between two adjacent connecting portions, and the outer ring portion and the central portion are respectively provided with a wiring portion; the central portion is provided with a plurality of airflow holes, and the extending direction of the airflow holes is consistent with the airflow direction in the air duct; Alternatively, the silicon carbide heating element is provided with a plurality of air flow holes, the air flow holes are arranged to be through-through at both ends, the extension direction of the air flow holes is consistent with the flow direction of the air flow in the air duct, and the outer side and the central area of ​​the silicon carbide heating element are respectively provided with wiring parts; Alternatively, the silicon carbide heating element comprises a plurality of heating segments connected in sequence, two adjacent heating segments are arranged at an angle, and a ventilation gap is formed between any two heating segments.

8. The novel hair dryer as claimed in claim 1, characterized in that: The silicon carbide heating element is arranged between the air outlet and the fan assembly.

9. The novel hair dryer as claimed in claim 8, characterized in that: The novel hair dryer also includes a circuit assembly, and the fan assembly and the silicon carbide heating element are both electrically connected to the circuit assembly; the circuit assembly is located between the silicon carbide heating element and the fan assembly, or the circuit assembly is located on a side of the fan assembly away from the silicon carbide heating element.

10. The novel hair dryer as claimed in claim 1, characterized in that: The novel hair dryer further comprises a heat insulating component, which is arranged in the handle and surrounds the circumference of the silicon carbide heating element; A protective net is provided at the air outlet.

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