Ceramic heating body, heating device and handheld air duct

Abstract

The utility model discloses a ceramic heating element, a heating device and a handheld air duct, the ceramic heating element comprises a heating part and two wiring parts, the heating part comprises a through hole and two heating sections, and the through hole is located between the two heating sections; the two wiring parts are electrically connected to the two ends of the heating sections respectively and are electrically connected with the two heating sections; wherein each of the two heating sections is provided with a unique current path, and the shapes of the two heating sections are the same. The ceramic heating body provided by the technical scheme of the utility model has the advantage of uniform heating.

Description

Technical Field

[0001] The utility model relates to the technical field of heating elements and their applications, and particularly to a ceramic heating element, a heating device, and a handheld hair dryer. Background Art

[0002] At present, hair dryers have become personal care products frequently used in daily life, mainly for drying hair and hair styling, etc. In the heating device of traditional hair dryers, generally, an electric heating wire wound around an insulating bracket is used for heating. During production, the electric heating wire and the insulating bracket need to be manufactured separately, and then the electric heating wire is wound around the insulating bracket. Such a heating device has a complex structure and a large size, resulting in a large size of the hair dryer, and the heating efficiency of the hair dryer is low.

[0003] In order to solve the disadvantages of traditional electric heating wire heating devices, some hair dryers on the market have adopted ceramic heating elements as new heating components. Ceramic heating elements are usually integrally formed and have the advantages of high heating efficiency, good stability, and compact size, thus being able to overcome the defects of traditional electric heating wire heating devices.

[0004] However, there are still some new problems in the application of current ceramic heating elements on the market. Specifically, when the ceramic heating element works, there is a problem of uneven internal current flow, resulting in uneven surface heating of the ceramic heating element and affecting the air outlet effect of the hair dryer. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a ceramic heating element, aiming to improve the heating uniformity of the ceramic heating element.

[0006] To achieve the above purpose, the ceramic heating element proposed by the utility model includes a heating part and two wiring parts. Among them,

[0007] The heating part includes a through hole and two heating segments, and the through hole is located between the two heating segments;

[0008] The two wiring parts are respectively electrically connected to both ends of the heating segment and are both electrically connected to the two heating segments;

[0009] Among them, both of the two heating segments have a unique current path, and the shapes of the two heating segments are the same.

[0010] In one embodiment, the two heating segments are symmetrically arranged with respect to the connection line of the two wiring parts.

[0011] In one embodiment, the two heating segments are connected end to end to form a closed-loop structure.

[0012] In one embodiment, the heating segment includes a plurality of bent portions or arc portions connected in sequence.

[0013] The present utility model further provides a heating device, which includes two clamping members and the ceramic heating element as described in any one of the above, and the two clamping members are respectively arranged on two sides of the axial direction of the ceramic heating element and cooperate with each other to clamp the ceramic heating element.

[0014] In one embodiment, at least one of the two clamping members is provided with a first slot, the first slot extends along the axial direction of the ceramic heating element, and the ceramic heating element is inserted into the first slot.

[0015] In one embodiment, a limiting structure is provided on the surface of the ceramic heating element, the limiting structure includes two first ribs arranged in parallel, a clamping slot penetrating along the axial direction of the ceramic heating element is formed between the two first ribs, and the clamping slot is arranged adjacent to the first slot;

[0016] The clamping member is inserted into the clamping slot.

[0017] In one embodiment, at least one of the two clamping members is further provided with a second slot, and the two clamping members are inserted and cooperated with each other through the second slot.

[0018] In one embodiment, the clamping member is in a plate-like structure, and the two clamping members are arranged at an angle.

[0019] The present utility model further provides a hand-held hair dryer, which includes a housing, a fan assembly and the ceramic heating element or the heating device as described in any one of the above. Among them,

[0020] The housing includes a hand-held part and an air duct part arranged at one end of the hand-held part. The air duct part is provided with a first air duct, the hand-held part is provided with a second air duct communicated with the first air duct, one end of the air duct part is provided with an air outlet, and the air outlet is communicated with one end of the first air duct far from the second air duct;

[0021] The fan assembly is installed in the housing and is used for driving air flow to flow from the second air duct through the first air duct to the air outlet;

[0022] The ceramic heating element or the heating device is arranged in the first air duct.

[0023] In one embodiment, the hand-held hair dryer is further provided with a heat insulation component in the air duct part. The heat insulation component surrounds the periphery of the ceramic heating element, and an inner surface of the heat insulation component is spaced from an outer surface of the ceramic heating element.

[0024] In one embodiment, at least one of the two clamping members abuts against the inner surface of the heat insulation component respectively on two sides in the radial direction of the ceramic heating element.

[0025] In one embodiment, the ceramic heating element further includes two wiring portions oppositely disposed on two opposite sides in the radial direction.

[0026] For the ceramic heating element of the technical solution of the present application, by making both heating segments have a unique current path and making the shapes of the two heating segments the same, it is ensured that each heating part of the ceramic heating element can generate heat evenly during operation, thereby improving its heating uniformity. The uniform heat distribution can avoid local overheating or uneven heat, improve the overall heating effect, and enhance the heating performance and user experience of household appliances.

[0027] In addition, the ceramic heating element has a high heating efficiency and can quickly generate heat in a short time, thereby significantly improving the heating efficiency of household appliances. This rapid temperature rise characteristic can not only shorten the preheating time of the device but also reduce energy consumption, thus achieving the goal of energy conservation and environmental protection.

[0028] Moreover, compared with the traditional electric heating wire heating device, the ceramic heating element adopts an integrated structure and has the advantages of simple structure and compact size. Its integrated design can reduce the assembly difficulty and the number of components, thereby improving production efficiency. At the same time, the compact structure of the ceramic heating element can effectively reduce the overall length of the heating device, and help to reduce the size and weight of household appliances while ensuring the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0030] Figure 1 It is a schematic structural diagram of an embodiment of the ceramic heating element of the present invention;

[0031] Figure 2 It is a schematic structural diagram of an embodiment of the heating device of the present invention;

[0032] Figure 3 It is an assembly schematic diagram of the ceramic heating element and two clamping members in the heating device of the present invention;

[0033] Figure 4 It is a schematic structural diagram of an embodiment of the hand-held hair dryer of the present invention;

[0034] Figure 5 is Figure 1 a sectional view of the illustrated embodiment;

[0035] Figure 6This is a schematic structural diagram of a heat insulation component and a heating device in a hand-held hair dryer of the present utility model;

[0036] Figure 7 This is a schematic side structural diagram of a heat insulation component and a heating device in a hand-held hair dryer of the utility model.

[0037] Explanation of the reference numerals in the attached drawings:

[0038] 11. Air duct part; 111. First air duct; 112. Air outlet; 12. Hand-held part; 121. Second air duct; 13. Air inlet; 20. Fan assembly; 30. Heating device; 31. Ceramic heating element; 31a. Heating section; 31b. Through hole; 311. Bent part; 312. Connecting part; 313. Wiring part; 314. First rib; 315. Second rib; 32. Clamping part; 321. First slot; 322. Second slot; 40. Circuit assembly; 50. Heat insulation component;

[0039] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0043] The present utility model provides a ceramic heating element, which can be used in various household appliances that require electric heating, such as hair dryers, hot air combs, curling irons, electric heaters, electric ovens, electric kettles, air fryers, electric water cups, etc.

[0044] In an embodiment of the present utility model, as Figure 1 shown, the ceramic heating element 31 includes a heating part and two wiring parts 313. Among them, the heating part includes a through hole 31b and two heating sections 31a. The through hole 31b is formed between the two heating sections 31a so that air flow can pass through the two heating sections 31a.

[0045] Specifically, when the ceramic heating element 31 is working, the air flow can flow through both the inner surface (i.e., the through hole 31b) and the outer surface of the ceramic heating element 31 and exchange heat with the ceramic heating element 31.

[0046] The two wiring parts 313 are respectively electrically connected to both ends of the heating section 31a and are simultaneously electrically connected to both heating sections 31a. The wiring part 313 can provide current input for each heating section 31a so that the two heating sections 31a can generate heat.

[0047] Furthermore, in the technical solution of the present application, both of the two heating sections 31a have a unique current path, and the shapes of the two heating sections 31a are the same. That is to say, each of the two heating sections 31a forms a current path between the two connection parts 313, and the two current paths are connected in parallel with each other, and the resistance distribution of the two current paths is the same. In this way, when the ceramic heating element is working, the current can flow along the current paths formed by the two heating sections 31a with the same path and resistance characteristics, so as to ensure the balanced distribution of the current in the two heating sections 31a, and the uneven distribution of the current density will not be caused by different structures or different path lengths. In this way, the problem of uneven heating caused by uneven current in the existing ceramic heating element is solved, and the heating efficiency and heating uniformity of the ceramic heating element are significantly improved. This characteristic of uniform heating helps to improve the heat exchange efficiency and the uniformity of heat distribution of household appliances.

[0048] It can be understood that for the ceramic heating element 31 in the technical solution of the present application, by making the two heating sections 31a have a unique current path and making the shapes of the two heating sections 31a the same, it is ensured that each heating part of the ceramic heating element 31 can generate heat evenly during operation, thereby improving its heating uniformity. The uniform heat distribution can avoid local overheating or uneven heat, improve the overall heating effect, and enhance the heating performance and user experience of household appliances.

[0049] In addition, the ceramic heating element 31 has a high heating efficiency and can quickly generate heat in a short time, thus significantly improving the heating efficiency of household appliances. This characteristic of rapid temperature rise can not only shorten the preheating time of the device, but also reduce energy consumption, thereby achieving the goal of energy conservation and environmental protection.

[0050] Compared with the traditional electric heating wire heating device 30, the ceramic heating element 31 adopts an integrated structure and has the advantages of simple structure and compact size. Its integrated design can reduce the assembly difficulty and the number of components, thereby improving the production efficiency. At the same time, the compact structure of the ceramic heating element 31 can effectively reduce the overall length of the heating device, and help to reduce the size and weight of household appliances on the premise of ensuring the heating effect.

[0051] Optionally, the ceramic heating element 31 can be made by using silicon carbide powder as the main sintering phase raw material and mixing it with one or more conductive phase raw materials such as 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. Then, it is formed and sintered 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, then water is used as a solvent, and they are uniformly mixed using a ball mill, and then spray-dried. The dried powder and paraffin are heated and kneaded in a certain mass ratio and poured into a hot die-casting machine to complete hot die-casting forming. After the green body is dried, it is placed in a sintering furnace for sintering forming to obtain the ceramic heating element 31.

[0052] In some embodiments, the two heating sections 31a are symmetrically arranged with respect to the connection line of the two connection parts 313. This symmetrical design can improve the heating uniformity of the ceramic heating element 31 in all directions, thus ensuring that heat is evenly distributed in all regions of the ceramic heating element 31 and avoiding the reduction of thermal efficiency or local overheating caused by uneven local heating.

[0053] Moreover, the symmetrical layout of the heating section 31a can reduce the concentrated distribution of local stress during the current conduction process. By balancing the resistance characteristics in the current path, the mechanical stress caused by uneven current distribution can be reduced, thereby effectively improving the mechanical stability of the ceramic heating element 31 and avoiding damage or deformation caused by thermal expansion and contraction.

[0054] Therefore, this design not only improves the heating performance of the ceramic heating element 31 but also significantly enhances its structural strength and durability. Since the local stress is effectively dispersed, the ceramic heating element 31 can maintain a stable structural form in a high-temperature environment, thereby extending its service life.

[0055] In addition, this design can also simplify the structural design of the ceramic heating element 31 to reduce its production cost.

[0056] Of course, the design of the present application is not limited to this. In other embodiments, the two heating sections 31a can also be arranged in parallel.

[0057] In some embodiments, the two heating sections 31a are connected end to end to form a closed-loop structure.

[0058] This design, on the one hand, the closed-loop structure can form a continuous current path when the current flows, reducing the local heating problem caused by sudden resistance changes, thereby improving the overall heat transfer uniformity of the heating element; secondly, the closed-loop design reduces the number of endpoints in the current path, thereby reducing the stress concentration phenomenon caused by too high local current density, and further improving the mechanical strength and durability of the ceramic heating element 31.

[0059] On the other hand, the closed-loop structure has a self-supporting characteristic in terms of physical form. Even under high-temperature working conditions, each part of the heating section 31a can support each other, avoiding deformation or cracking caused by thermal expansion. This structure makes the ceramic heating element 31 more stable during operation and maintains good structural integrity during long-term use.

[0060] At the same time, through this structure, when the air flow passes through the ceramic heating element 31, it can come into contact with the surface of the ceramic heating element 31 more fully, ensuring effective heat transfer.

[0061] In some embodiments, the heating section 31a includes a plurality of bent portions 311 or arc portions connected in sequence.

[0062] It can be understood that this design can effectively increase the surface area of the ceramic heating element 31, thereby improving the heat transfer efficiency, and enabling the heating section 31a to be arranged in a smaller space, meeting the design requirements of compact household appliances.

[0063] Optionally, the plurality of bent portions 311 are compactly arranged through different angle changes, enabling the heating section 31a to complete a longer heating path within a smaller volume, which is suitable for small household appliances with a relatively compact structure; while the arc portion can provide a smoother current path, reducing the adverse impact of local resistance mutation on the heating performance.

[0064] Optionally, the plurality of bent portions 311 can be connected end to end in sequence through the connecting portion 312. In this way, the distance between the bent portions 311 can be increased, thereby increasing the air flow rate flowing through the surface of the ceramic heating element 31 and improving the heat exchange efficiency of the ceramic heating element 31.

[0065] As Figures 1 to 3 shown, the present utility model also proposes a heating device 30, which includes two clamping members 32 and a ceramic heating element 31. The two clamping members 32 are respectively arranged on both sides of the axial direction of the ceramic heating element 31 and cooperate with each other to clamp the ceramic heating element 31. In this way, the ceramic heating element 31 can be fixed in a household appliance by clamping.

[0066] This clamping design, on the one hand, does not damage the integral structure of the ceramic heating element 31, and at the same time ensures the detachable property of the ceramic heating element 31 in the household appliance, facilitating the installation and subsequent replacement of the ceramic heating element 31.

[0067] On the other hand, since the two clamping members 32 are respectively arranged on both sides of the ceramic heating element 31 in the axial direction, when clamping the ceramic heating element 31, it can effectively reduce the occlusion of the outer surface and the surface (the outer surface and the inner surface are the main heat exchange surfaces of the ceramic heating element 31) of the ceramic heating element 31. This design ensures the maximization of the heat exchange efficiency of the ceramic heating element 31, enables the air flow to fully contact its surface when passing through the heating element, and improves the heating effect.

[0068] It should be noted that the specific structure of the ceramic heating element 31 can refer to the above-mentioned embodiments. Since the heating device 30 of this embodiment adopts the above-mentioned ceramic heating element 31, it has the technical effects of all the above-mentioned embodiments.

[0069] In some embodiments, both of the two clamping members 32 are provided with first slots 321. The first slots 321 extend along the axial direction of the ceramic heating element 31 and form first openings at the end faces of the clamping members 32. The ceramic heating element 31 is inserted into the first slots 321 from the first openings.

[0070] It can be understood that the slot structure can provide better limitation and ensure the stability of the ceramic heating element 31 in the household appliance. At the same time, the setting of the first opening makes it more convenient for users to install and replace the heating element, reducing the operation difficulty.

[0071] Of course, the design of the present application is not limited to this. In other embodiments, the first slot 321 may also be provided on any one of the two clamping members 32.

[0072] In addition, in some embodiments, the two clamping members 32 can also be fixed to the ceramic heating element 31 by abutting against the two end faces of the ceramic heating element 31.

[0073] In some embodiments, the connecting portion 312 of the ceramic heating element 31 is inserted into the first slot 321. Since the connecting portion 312 of the ceramic heating element 31 is closer to the center of the ceramic heating element 31 than the bending portion 311, in this way, it helps to reduce the volume of the clamping member 32, reduce the occlusion of the clamping member 32 to the ceramic heating element 31, ensure that more heat exchange surfaces are exposed to the air flow, and thus improve the heat transfer efficiency.

[0074] In some embodiments, the clamping member 32 is provided with two first slots 321, and the two connecting portions 312 on the two radial sides of the ceramic heating element 31 are inserted into the two first slots 321. Through this uniformly distributed clamping design, the fixing stability of the ceramic heating element 31 in the household appliance can be effectively improved, and the displacement caused by thermal expansion or air flow impact can be reduced. At the same time, increasing the clamping points also helps to disperse stress and reduce the risk of damage to the ceramic heating element 31.

[0075] In some embodiments, the depth of the first slot 321 is greater than the length of the ceramic heating element 31. This design not only ensures sufficient space for the insertion of the ceramic heating element 31, avoiding problems such as insecure fixation or displacement, but also effectively reduces the occupied space of the heating device 30 along the axial direction of the ceramic heating element 31. By reducing the occupied space, sufficient installation space can be reserved for other structures of the household appliance, or the size of the household appliance can be reduced, thereby optimizing the overall design layout to improve the compactness and portability of the product.

[0076] In some embodiments, a plurality of limiting structures are provided on the inner surface of the ceramic heating element 31. The limiting structures include two first ribs 314 arranged in parallel. A clamping groove penetrating along the axial direction of the ceramic heating element 31 is formed between the two first ribs 314, and the clamping groove is adjacent to the first slot 321; the clamping member 32 is inserted into the clamping groove.

[0077] With this design, the first slot 321 formed by the limiting structure can effectively limit the position of the clamping member 32, ensuring mutual limitation between the clamping member 32 and the ceramic heating element 31, thereby further improving the stability of the ceramic heating element 31.

[0078] In addition, the clamping groove provides a clear positioning for the clamping member 32, simplifies the assembly process of the clamping member 32 and the ceramic heating element 31, and improves production efficiency.

[0079] Of course, the design of the present application is not limited to this. In other embodiments, the limiting structures can also be provided on both the inner surface and the outer surface of the ceramic heating element 31, or only on the outer surface of the ceramic heating element 31. In addition, in other embodiments, the number of the limiting structures is not limited, and can be one, two, three, four or more.

[0080] In some embodiments, both clamping members 32 are provided with second slots 322. The second slots 322 extend along the axial direction of the ceramic heating element 31 and form second openings at the end faces of the clamping members 32. The two clamping members 32 are inserted and cooperated with each other through the second slots 322.

[0081] It can be understood that the insertion and cooperation of the two clamping members 32 through the second slots 322 can make the two clamping members 32 closely combined, thereby improving the clamping stability of the ceramic heating element 31. At the same time, this structure enhances the overall strength of the heating device 30, effectively resists external impacts and vibrations, and ensures reliability and safety under various usage conditions.

[0082] Of course, the design of the present application is not limited to this. In other embodiments, it can also be that one of the two clamping members 32 is provided with the second slot 322. At this time, the two clamping members 32 can still be inserted and cooperated through the second slot 322.

[0083] In addition, in some embodiments, the two clamping members 32 may also be hingedly connected via a hinge structure. In this case, the two clamping members 32 may clamp the ceramic heating element 31 under the action of an elastic member (such as a spring, a torsion spring, a pull rope, etc.).

[0084] In some embodiments, the clamping member 32 is a plate-like structure, and the two clamping members 32 are arranged at an angle. That is to say, the two clamping members 32 are staggered from each other. This means that the abutting positions of the two clamping members 32 on the ceramic heating element 31 (i.e., the ends of the first slots 321) are staggered from each other in the circumferential direction of the ceramic heating element 31, so that these abutting positions are evenly distributed, further improving the stability of the ceramic heating element 31 in the household appliance, and at the same time making the ceramic heating element 3131 evenly stressed, avoiding damage to the ceramic heating element 31 due to stress concentration.

[0085] In addition, the plate-shaped structure of the clamping member 32 can reduce thickness, reduce shielding of the ceramic heating element 31, and provide a smoother path for the flow of air to ensure heat exchange efficiency.

[0086] like Figures 1 to 7 As shown, the utility model provides a handheld hair dryer.

[0087] In an embodiment of the utility model, the handheld hair dryer includes a shell, a fan assembly 20 and a heating device 30, wherein the shell includes a handheld portion 12 and an air duct portion 11 arranged at one end of the handheld portion 12, the air duct portion 11 is provided with a first air duct 111, the handheld portion 12 is provided with a second air duct 121 connected to the first air duct 111, and one end of the air duct portion 11 is provided with an air outlet 112, and the air outlet 112 is connected to one end of the first air duct 111 away from the second air duct 121.

[0088] The fan assembly 20 is installed in the housing, and is used to drive the air flow from the second air duct 121 to flow through the first air duct 111 to the air outlet 112 .

[0089] The heating device 30 is disposed in the first air duct 111 . The specific structure of the heating device 30 may refer to the above-mentioned embodiment of the heating device 30 .

[0090] In some embodiments, the handheld portion 12 is provided with a second air duct 121, which is communicated with the first air duct 111. An end of the handheld portion 12 away from the air duct portion 11 is provided with an air inlet 13, which is communicated with the second air duct 121, and the fan assembly 20 is arranged in the second air duct 121 or the first air duct 111. In this way, the space in the handheld portion 12 can be fully utilized, which is conducive to reducing the size of the air duct portion 11, thereby reducing the overall size of the hair dryer, which is convenient for users to hold, use and store.

[0091] Optionally, at least one of the end face and the circumferential side of the handheld part 12 is provided with an air inlet 13. The air inlet 13 can be provided on the circumferential side of the handheld part 12, or the air inlet 13 can be provided on the end face of the handheld part 12, or the air inlet 13 can be provided on both the circumferential side and the end face of the handheld part 12.

[0092] Of course, the design of the present application is not limited thereto. In some embodiments, an air inlet 13 can also be provided at one end of the air duct part 11 away from the air outlet 112, and the air inlet 13 is communicated with the first air duct 111. At this time, the fan assembly 20 can be arranged in the first air duct 111. In this way, when the air flow enters the first air duct 111 from the air inlet 13, it can flow directly to the air outlet 112, reducing losses and increasing the air outlet speed.

[0093] Specifically, the hair dryer further includes a circuit assembly 40. The fan assembly 20 and the heating device 30 (ceramic heating element 31) are both electrically connected to the circuit assembly 40. The circuit assembly 40 has circuit structures such as a controller and a power supply circuit. The specific circuit structure can refer to the prior art, and the present invention will not elaborate on this one by one.

[0094] Optionally, the circuit assembly 40 is further provided with a power cord for the user to connect to an external power supply; or the circuit assembly 40 is provided with a power interface for connecting the power cord.

[0095] The technical solution of the present application uses the ceramic heating element 31, so that the surface of the ceramic heating element 31 is used as the heat exchange surface to directly exchange heat with the air flow flowing through the air duct. The ceramic heating element 31 has a high thermal efficiency and can generate heat quickly, so that the air flow can be heated quickly. Moreover, the wavy branches 311 of the ceramic heating element 31 contribute to the surface area of the ceramic heating element 31, thereby increasing the heat conduction area to improve the heating efficiency. In addition, the multiple wavy branches 311 protruding circumferentially on the ceramic heating element 31 also make the heat exchange surface of the ceramic heating element 31 more evenly distributed, thereby improving the hot air outlet effect. In addition, compared with the traditional electric heating wire heating device 30, the ceramic heating element 31 is an integral structure, with a simple structure and a small size, which can reduce the length of the heating device 30. That is, while ensuring the heating effect, the occupied space in the air duct part 11 can be reduced, thereby reducing the size of the hair dryer and facilitating the user to use and store.

[0096] In some embodiments, the handheld hair dryer of the present application may also only include a ceramic heating element. At this time, the ceramic heating element is arranged in the first air duct and fixed by means of fasteners, adhesives, etc.

[0097] It should be noted that since the handheld hair dryer of the present application adopts the heating device or ceramic heating element of the above embodiments, it has all the technical effects of the above embodiments, which will not be elaborated here.

[0098] In some embodiments, the hand-held hair dryer further includes a heat insulation member 50 provided in the air duct portion 11. The heat insulation member 50 surrounds the circumferential side of the ceramic heating element 31, and the inner surface of the heat insulation member 50 is spaced apart from the outer surface of the ceramic heating element 31.

[0099] With this arrangement, the heat insulation member 50 can reduce the heat conduction of the ceramic heating element 31 to the outer surface of the hand-held portion 12, which is beneficial to reducing heat loss and can also prevent the hand-held portion 12 from overheating and scalding the user or causing discomfort during use. Among them, the heat insulation member 50 is formed in a cylindrical shape and has a through channel at both ends inside. The ceramic heating element 31 is disposed in the channel, and its material can be ABS plastic, PP plastic, heat insulation foam, etc.

[0100] In some embodiments, at least one of the two clamping members 32 abuts against the inner surface of the heat insulation member 50 on both sides in the radial direction of the ceramic heating element 31.

[0101] With this design, on the one hand, through the abutment of the clamping member 32 against the inner surface of the heat insulation member 50, the thermal insulation between the ceramic heating element 31 and the heat insulation member 50 is ensured, so as to keep the external temperature within a safe range.

[0102] On the other hand, this abutment design also limits the clamping member 32 and the heat insulation member 50 to each other, improves the installation stability of the ceramic heating element 31, and ensures the relative position between it and the heat insulation member 50 remains consistent, so as to enhance the safety of the overall structure.

[0103] In some embodiments, a plurality of second ribs 315 protrude from the outer surface of the ceramic heating element 31. The second ribs 315 abut against the inner surface of the heat insulation member 50, and at least two second ribs 315 are provided on both sides in the radial direction of the ceramic heating element 31.

[0104] Through this abutment design, the second ribs 315 can not only further prevent the ceramic heating element 31 from displacing during operation, but also further ensure the thermal insulation between the ceramic heating element 31 and the heat insulation member 50, so as to keep the external temperature within a safe range.

[0105] Optionally, the second ribs 315 are provided on the bent portion 311. Of course, they can also be provided on the connecting portion 312.

[0106] It should be noted that the technical solution of the present application does not limit the number of the second ribs 315, which can be one, two, three, four or more.

[0107] The above are only the preferred embodiments of the present utility model, and do not thereby limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A ceramic heating element, characterized in that, Comprising: A heating part, including a through hole and two heating sections, the through hole being located between the two heating sections; And Two wiring parts, electrically connected to both ends of the heating section respectively and electrically connected to both heating sections; Wherein, both of the two heating sections have a unique current path and the shapes of the two heating sections are the same.

2. The ceramic heating element according to claim 1, characterized in that, The two heating sections are symmetrically arranged with respect to the connection line of the two wiring parts.

3. The ceramic heating element according to claim 1 or 2, characterized in that, The two heating sections are connected end to end to form a closed-loop structure.

4. The ceramic heating element according to claim 1 or 2, characterized in that, The heating section includes a plurality of bent parts or arc parts connected in sequence.

5. A heating device, characterized in that, Comprising two clamping members and a ceramic heating element according to any one of claims 1 to 4, the two clamping members are respectively arranged on both sides of the axial direction of the ceramic heating element and cooperate with each other to clamp the ceramic heating element.

6. The heating device according to claim 5, wherein At least one of the two clamping members is provided with a first slot, and the ceramic heating element is inserted into the first slot.

7. The heating device according to claim 6, wherein, A limiting structure is arranged on the surface of the ceramic heating element, the limiting structure includes two first ribs arranged in parallel, a clamping slot penetrating along the axial direction of the ceramic heating element is formed between the two first ribs, and the clamping slot is adjacent to the first slot; The clamping member is inserted into the clamping slot.

8. The heating device according to claim 6, characterized in that, At least one of the two clamping members is further provided with a second slot, and the two clamping members are inserted and cooperated with each other through the second slot.

9. The heating device according to claim 7, characterized in that, The clamping member is of a plate-shaped structure, and the two clamping members are arranged at an angle.

10. A handheld hair dryer, characterized in that, Comprising: A housing, including a handheld part and an air duct part arranged at one end of the handheld part, the air duct part is provided with a first air duct, the handheld part is provided with a second air duct communicated with the first air duct, one end of the air duct part is provided with an air outlet, and the air outlet is communicated with one end of the first air duct far away from the second air duct; A fan assembly, installed in the housing, for driving air flow to flow from the second air duct through the first air duct to the air outlet; And A ceramic heating element according to any one of claims 1 to 4, or a heating device according to any one of claims 5 to 9; Wherein, the ceramic heating element or the heating device is arranged in the first air duct.

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