Hair dryer

Abstract

The utility model discloses a hair dryer which comprises a shell, a main control board, a fan assembly, a ceramic heating body and a power supply battery, and the shell is provided with an air inlet, an air outlet and an air supply duct located between the air inlet and the air outlet; the main control board is arranged on the shell; the fan assembly is arranged in the air supply duct and is electrically connected with the main control board; the ceramic heating body is arranged in the air supply duct and electrically connected with the main control board, and the ceramic heating body is used for heating air flowing through the air supply duct; the power supply battery is arranged in the shell, and the power supply battery is electrically connected with the main control board so as to supply power to the main control board. The technical scheme of the utility model is convenient for a user to use in multiple scenes.

Description

Technical Field

[0001] This utility model relates to the field of hair drying devices, and in particular to a hair dryer. Background Technology

[0002] Hair dryers have become a common household appliance, typically used for drying or styling hair. Traditional hair dryers generally use heating wires, which consume a lot of energy and usually require a power cord to be connected to an outlet. This limits their use to areas near electrical outlets, making them unsuitable for outdoor use or during power outages. Utility Model Content

[0003] The main purpose of this invention is to provide a hair dryer that is convenient for users to use in various scenarios.

[0004] To achieve the above objectives, the hair dryer proposed in this utility model includes:

[0005] The housing is provided with an air inlet, an air outlet, and an air supply duct located between the air inlet and the air outlet;

[0006] The main control board is located in the housing;

[0007] The fan assembly is located inside the air supply duct and is electrically connected to the main control board;

[0008] A ceramic heating element is disposed within the air supply duct and electrically connected to the main control board. The ceramic heating element is used to heat the air flowing through the air supply duct.

[0009] A power supply battery is disposed in the housing and is electrically connected to the main control board to supply power to the main control board.

[0010] Optionally, the hair dryer further includes a charging component, a charging circuit is provided on the main control board, the charging component is located on the housing, and both the power supply battery and the charging component are electrically connected to the charging circuit.

[0011] Optionally, the charging component is an interface female, the housing is provided with a mounting hole, and the interface female is disposed in the mounting hole; or, the charging component is a wireless charging coil, and the wireless charging coil is disposed inside the housing.

[0012] Optionally, the power supply battery is at least partially located within the air supply duct.

[0013] Optionally, the main control board is located on one side of the power supply battery and inside the air supply duct.

[0014] Optionally, the housing has a grip portion and an air outlet portion located at one end of the grip portion. The hair dryer also includes a filter assembly. The air outlet is located at the air outlet portion, the air inlet is located at the end of the grip portion away from the air outlet portion, the filter assembly covers the air inlet, and the power supply battery portion is located inside the filter assembly.

[0015] Optionally, the ceramic heating element is annular and has two wiring portions and two heating portions connected between the two wiring portions, with the two heating portions symmetrically arranged about the line connecting the two wiring portions.

[0016] Optionally, the heating element is arranged in multiple bends in the circumferential direction of the ceramic heating element to form multiple ventilation grooves on both the inner and outer sides of the heating element, and the ventilation grooves are arranged through both ends in the axial direction of the ceramic heating element.

[0017] Optionally, the hair dryer further includes a first support plate and a second support plate. The first support plate has two first slots and a slot located between the two first slots. The second support plate has two second slots and a plug-in portion located between the two second slots. The plug-in portion is inserted into the slot. One of the heating elements is inserted into one of the first slots and one of the second slots, and the other heating element is inserted into the other first slot and the other second slot.

[0018] Optionally, both the first support plate and the second support plate are located in the ventilation slot outside the heating element.

[0019] Optionally, both the first support plate and the second support plate are protruding from the outer peripheral surface of the ceramic heating element.

[0020] Optionally, the hair dryer further includes a heat insulation cylinder, which is sleeved on the ceramic heating body, and the first support plate and the second support plate abut against the inner wall of the heat insulation cylinder.

[0021] Optionally, the air supply duct includes a first duct extending in the vertical direction and a second duct extending in the front-back direction. The second duct connects the first duct and the air outlet. The second duct is arc-shaped and gradually bends from the first duct toward the air outlet to connect the first duct and the air outlet.

[0022] The beneficial effects of this utility model are as follows: By incorporating a power supply battery within the hair dryer, the main control board, fan assembly, and ceramic heating element can be powered when there is no power source or when it is inconvenient to plug in a cord. This avoids the hair dryer being restricted by a power cord and requiring constant plugging in, thus expanding the hair dryer's usage scenarios. Moreover, compared to heating wires, using a ceramic heating element results in higher heating efficiency and lower energy consumption. When powered by a battery, this allows for a longer battery life, making it more convenient for users to use outdoors and in more situations such as power outages. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the hair dryer of this utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the ceramic heating element and the first and second support plates;

[0026] Figure 3 for Figure 2 Exploded view of the ceramic heating element and the first and second support plates;

[0027] Figure 4 for Figure 2 Top view of the ceramic heating element and the heat insulation cylinder;

[0028] Explanation of icon numbers:

[0029] 10. Housing; 101. Air inlet; 102. Air outlet; 103. Air supply duct; 104. First air duct; 105. Second air duct; 11. Outer shell; 111. Grip part; 112. Air outlet part; 113. Front shell; 114. Rear shell; 12. Air guide shell; 13. Mounting cavity; 20. Ceramic heating element; 21. Wiring part; 22. Heating part; 23. Ventilation slot; 24. Ventilation gap; 30. Power supply battery; 40. Fan assembly; 51. Conductive component; 52. First support plate; 521. First slot; 522. Slot; 53. Second support plate; 531. Second slot; 532. Plug-in part; 54. Heat insulation cylinder; 61. Main control board; 70. Filter assembly.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] This utility model proposes a hair dryer.

[0035] In the embodiments of this utility model, such as Figures 1 to 4 As shown, the hair dryer includes a housing 10, a main control board 61, a fan assembly 40, a ceramic heating element 20, and a power supply battery 30. The housing 10 has an air inlet 101, an air outlet 102, and an air supply duct 103 located between the air inlet 101 and the air outlet 102. The main control board 61 is located in the housing 10, and the fan assembly 40 is located in the air supply duct 103. The fan assembly 40 is used to drive air from the air inlet 101 into the air supply duct 103 and then out of the air outlet 102. The ceramic heating element 20 is located in the air supply duct 103 and is used to heat the air flowing through the air supply duct 103. Both the fan assembly 40 and the ceramic heating element 20 are electrically connected to the main control board 61.

[0036] The power supply battery 30 is located in the housing 10 and is electrically connected to the main control board 61. The power supply battery 30 provides power to the main control board 61 so that the main control board can control the operation of the fan assembly 40 and the ceramic heating element 20. In use, the power supply battery 30 supplies power to the main control board 61, so that the hair dryer does not need to be plugged in at all times, making it convenient for users to use while on the go.

[0037] Specifically, the ceramic heating element 20 is a heating structure with at least two spaced-apart wiring portions 21 connected to the main control board 61. One wiring portion 21 is connected to the positive terminal of the power supply, and the other is connected to the negative terminal. After the power is turned on, current flows through the ceramic heating element 20, converting electrical energy into heat energy and transferring the heat to the surface of the ceramic heating element 20. When airflow passes through the ceramic heating element 20, heat exchange occurs between the airflow and the ceramic heating element 20, thus heating the airflow passing through the ceramic heating element 20. Compared to heating wires, the ceramic heating element 20 has higher heating efficiency, allowing for a smaller size and reducing the space it occupies in the hair dryer. Furthermore, the ceramic heating element 20 will not melt even after prolonged use, resulting in a longer service life.

[0038] This utility model's technical solution incorporates a power supply battery 30 within the hair dryer. This allows the battery 30 to power the main control board 61, fan assembly 40, and ceramic heating element 20 in situations where there is no power source or where plugging in is inconvenient. This avoids the hair dryer being restricted by a power cord and requires constant plugging, thus expanding its usage scenarios. Furthermore, compared to heating wires, the ceramic heating element 20 offers higher heating efficiency and lower energy consumption. When powered by the battery 30, this results in a longer battery life for the hair dryer, making it more convenient for users to use outdoors and in situations such as power outages.

[0039] In some embodiments, the ceramic heating element 20 is annular and has two wiring portions 21 and two heating portions 22 connected between the two wiring portions 21. The two heating portions 22 are symmetrically arranged about the line connecting the two wiring portions 21. That is, after the power is turned on, current flows through the two heating portions 22, thereby converting electrical energy into heat energy. When airflow flows over the surface of the heating portions 22, heat exchange occurs between the airflow and the heating portions 22, thereby heating the airflow flowing through the ceramic heating element 20. By symmetrically arranging the two heating portions 22 about the line connecting the two wiring portions 21, the length and cross-section of the two heating portions 22 are approximately the same. When current is applied, the two heating portions 22 heat up evenly, resulting in uniform heating of the airflow in the air outlet duct and improving the heat exchange effect.

[0040] Optionally, the heating element 22 is arranged with multiple bends in the circumferential direction of the ceramic heating element 20, so that multiple ventilation grooves 23 are formed on both the inner and outer sides of the heating element 22, and the ventilation grooves 23 are arranged through both ends in the axial direction of the ceramic heating element 20. This can increase the surface area of ​​the heating element 22, thereby improving the heat exchange efficiency. In other embodiments, the heating element 22 is provided with multiple through holes, each through hole being arranged through both ends in the axial direction of the ceramic heating element 20.

[0041] Of course, in other embodiments, the ceramic heating element 20 includes an inner ring portion, an outer ring portion spaced outside the inner ring portion, and a plurality of connecting portions connecting the inner ring portion and the outer ring portion. The plurality of connecting portions are circumferentially spaced in the inner ring portion, and heat exchange holes are formed between any two adjacent connecting portions. This results in a larger surface area of ​​the ceramic heating element 20, which can improve the heat exchange efficiency.

[0042] Optionally, the ceramic heating element 20 is a silicon carbide ceramic heating element. Specifically, the silicon carbide ceramic heating element is made of silicon carbide ceramic material. By using a silicon carbide ceramic heating element as the ceramic heating element 20, the heating efficiency of the ceramic heating element 20 can be improved, and the heating rate can be increased. The silicon carbide ceramic heating element can be made by mixing silicon carbide powder as the main sintering phase raw material with one or more conductive phase raw materials selected from 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 it according to the designed shape. For example, silicon carbide powder, yttrium oxide powder, alumina powder, and titanium boride powder can be uniformly mixed in a certain mass ratio, then water is added as a solvent, and the mixture is uniformly mixed using a ball mill. The mixture is then spray-dried, and the dried powder is heated and mixed with paraffin wax in a certain mass ratio. The mixture is then poured into a hot-press casting machine to complete the hot-press casting process. After drying, the blank is placed in a sintering furnace for sintering to obtain a silicon carbide ceramic heating element. Of course, in other embodiments, zirconium oxide, alumina, yttrium oxide, silicon oxide, or silicon nitride can also be used as the main sintering phase raw materials.

[0043] In some embodiments, the hair dryer further includes two conductive elements 51, each conductive element 51 being clamped to a wiring portion 21 for electrical connection. That is, the conductive elements 51 and the ceramic heating element 20 are separately formed. This arrangement simplifies the structure of the ceramic heating element 20, facilitates its molding, and reduces production difficulty and cost. The conductive elements 51 can be clamped to the wiring portion 21 using clips or screws, or they can be welded to the wiring portion 21 to ensure reliable wiring.

[0044] In some embodiments, the hair dryer further includes a first support plate 52 and a second support plate 53. The first support plate 52 has two first slots 521 and a slot 522 located between the two first slots 521. The second support plate 53 has two second slots 531 and a plug-in portion 532 located between the two second slots 531. The plug-in portion 532 is plugged into the slot 522. One heating element 22 is inserted into one of the first slots 521 and one of the second slots 531, and another heating element 22 is inserted into the other first slot 521 and the other second slot 531. Specifically, when the plug-in portion 532 is inserted into the slot 522, the two first slots 521 and the two second slots 531 are alternately distributed along the circumference of the ceramic heating element 20 and are all engaged with the corresponding heating element 22. The first support plate 52 and the second support plate 53 are arranged at a certain angle to form a ventilation gap 24 between the first support plate 52 and the second support plate 53. This design effectively secures the annular heating element while reducing the contact area between the first support plate 52, the second support plate 53, and the ceramic heating element 20. This allows the ceramic heating element 20 to be fully exposed within the air duct 103, ensuring a larger heat exchange area and improving heat exchange efficiency. Alternatively, in other embodiments, the inner wall of the air duct 103 can be provided with slots / protrusions to hold the ceramic heating element 20 in place.

[0045] In some embodiments, the first support plate 52 and the second support plate 53 are both located at the ventilation groove 23 on the outside of the heating part 22. Specifically, there is a large space between the ventilation groove 23 on the outside of the heating part 22 and the housing 10. By locating the first support plate 52 and the second support plate 53 at the ventilation groove 23 on the outside of the heating part 22, the size of the part between the side of the first support plate 52 and the first slot 521 can be larger, ensuring that the structural strength at the first slot 521 is high (the same applies to the second support plate 53), reducing the risk of breakage at the first slot 521 of the first support plate 52 (the second slot 531 of the second support plate 53), and ensuring that the ceramic heating element 20 is reliably installed.

[0046] In some embodiments, both the first support plate 52 and the second support plate 53 protrude from the outer peripheral surface of the ceramic heating element 20. When the portion of the first support plate 52 that protrudes from the outer peripheral surface of the ceramic heating element 20 is mounted on the housing 10 or other components, a gap can be formed on the outer peripheral surface of the ceramic heating element 20 to allow airflow to pass through. This allows full utilization of the surface of the ceramic heating element 20 for heat exchange with the airflow, thereby improving heat exchange efficiency.

[0047] In some embodiments, the hair dryer further includes a heat insulation cylinder 54, which is sleeved outside the ceramic heating element 20. The first support plate 52 and the second support plate 53 both abut against the inner wall of the heat insulation cylinder 54. This allows the outer peripheral surface of the ceramic heating element 20 to form a ventilation gap 24 with the inner wall of the heat insulation cylinder 54. Since the heat insulation cylinder 54 can play a heat insulation role, it can reduce heat loss and allow heat to accumulate in the ventilation gap 24. When the airflow passes through, it can fully exchange heat and improve the heating effect of the airflow.

[0048] In some embodiments, the hair dryer further includes a charging component. A charging circuit is provided on the main control board 61, and the charging component is located in the housing 10. Both the power supply battery 30 and the charging component are electrically connected to the charging circuit. That is, the power supply battery 30 is a rechargeable battery (e.g., a lithium-ion battery). When the power supply battery 30 is depleted, it can be recharged by connecting a charger through the charging component without needing to be removed. This allows the power supply battery 30 to be integrated and fixed inside the hair dryer, simplifying the hair dryer's structure and improving its compactness. Of course, in other embodiments, the power supply battery 30 is detachably connected to the housing 10.

[0049] The charging component can take various forms. For example, in some embodiments, the charging component is an interface female (e.g., a Type-C female), with the housing 10 having mounting holes and the interface female located within the mounting holes. This structure is simple and has a low cost. In other embodiments, the charging component is a wireless charging coil, which is located inside the housing 10. This avoids the need for openings in the housing 10 and improves water resistance.

[0050] In some embodiments, the power supply battery 30 is at least partially located within the air supply duct 103. This allows airflow to pass over the power supply battery 30 during use, thereby removing heat generated by the battery and eliminating the need for a separate heat dissipation structure, thus simplifying the hair dryer's structure. Optionally, the main control board 61 is located on one side of the power supply battery 30 and within the air supply duct 103. Similarly, during use, airflow can pass over the main control board 61, thereby removing heat generated by the electronic components on the main control board 61.

[0051] In some embodiments, the housing 10 has a grip portion 111 and an air outlet 112 located at one end of the grip portion 111. The hair dryer includes a filter assembly 70, an air outlet 102 is disposed at the air outlet 112, and an air inlet 101 is disposed at the end of the grip portion 111 away from the air outlet 112. The filter assembly 70 covers the air inlet 101, and a power supply battery 30 is partially located inside the filter assembly 70. Specifically, the filter assembly 70 has an annular peripheral wall and a bottom wall that blocks one end of the annular peripheral wall. The other end of the annular peripheral wall covers the air inlet 101. The annular peripheral wall has a plurality of ventilation holes, that is, the power supply battery 30 partially extends into the inner side of the annular peripheral wall. The power supply battery 30 is spaced apart from the annular peripheral wall, so that the space inside the filter assembly 70 can be used to accommodate the power supply battery 30, which can improve the space utilization rate inside the grip portion 111.

[0052] In some embodiments, the air supply duct 103 includes a first air duct 104 extending in the vertical direction and a second air duct 105 extending in the front-back direction. The second air duct 105 connects the first air duct 104 and the air outlet 102. The second air duct 105 is arc-shaped and gradually bends from the first air duct 104 toward the air outlet 102 to connect the first air duct 104 and the air outlet 102. Specifically, the housing 10 includes an outer shell 11 and an air guide shell 12. The outer shell 11 includes a grip portion 111 extending in the vertical direction and an air outlet portion 112 located at one end of the grip portion 111 and extending in the front-back direction. An air outlet 102 is located at one end of the air outlet portion 112. A first air duct 104 is located inside the grip portion 111, and a second air duct 105 is located inside the air guide shell 12. The second air duct 105 is arc-shaped and gradually bends from the first air duct 104 toward the air outlet 102 to connect the first air duct 104 and the air outlet 102. That is, the air outlet 102 and the first air duct 104 are spaced apart in the front-back direction, and the second air duct 105 gradually bends forward from the first air duct 104 and extends to the air outlet 102. With this configuration, when airflow moves from the first duct 104 to the second duct 105, the curved wall of the second duct 105 can gradually guide the airflow towards the outlet 102, avoiding airflow turbulence caused by vertical impact on the inner wall of the second duct 105. This reduces wind speed attenuation and improves the airflow effect. Simultaneously, due to the high heating efficiency of the ceramic heating element 20, its size can be relatively small. Therefore, the ceramic heating element 20 can be installed in the first duct 104, allowing the airflow to pass through it before flowing into the second duct 105. This avoids obstruction of the airflow by the ceramic heating element 20 during the change of direction, thus reducing the rate of airflow velocity attenuation during the change of direction and further improving the airflow effect.

[0053] Optionally, the ceramic heating element 20 is located at the connection between the first air duct 104 and the second air duct 105; this allows the ceramic heating element 20 to be close to the air outlet 102, shortening the flow path of the hot air from the ceramic heating element 20 to the air outlet 102, thereby reducing heat loss, and also preventing the hot air from flowing through the fan assembly 40, thus preventing the fan assembly 40 from overheating.

[0054] In some embodiments, the air guide shell 12 is generally arc-shaped, and a mounting cavity 13 is formed between the side of the air guide shell 12 facing away from the air outlet 102 and the outer casing 11. That is, the shape of the air guide shell 12 is approximately the same as the shape of the first air duct 104, which simplifies the structure and size of the air guide shell 12, thereby reducing the space occupied by the air guide shell 12 in the outer casing 11. Other components can be installed in the mounting cavity 13 formed between the air guide shell 12 and the outer casing 11, thereby improving the structural compactness. In some embodiments, the power supply battery 30 may also be disposed in the mounting cavity 13.

[0055] Optionally, the air outlet 112 is mainly composed of a front shell 113 and a rear shell 114. The grip 111 is cylindrical and connects the front shell 113 and the rear shell 114, i.e., the front shell 113 and the rear shell 114 are distributed front and rear. During installation, the air guide shell 12 is first installed on the front shell 113 or the rear shell 114, then the front shell 113 and the rear shell 114 are connected and fixed, and finally the grip 111 is assembled and fixed to the front shell 113 and the rear shell 114. This assembly is convenient and makes the structure of the front shell 113 and the rear shell 114 simple and easy to form. In other embodiments, the air outlet 112 is mainly composed of a left shell and a right shell.

[0056] 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 transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hair dryer, characterized in that, include: The housing is provided with an air inlet, an air outlet, and an air supply duct located between the air inlet and the air outlet; The main control board is located in the housing; The fan assembly is located inside the air supply duct and is electrically connected to the main control board; A ceramic heating element is disposed in the air supply duct and electrically connected to the main control board. The ceramic heating element is used to heat the air flowing through the air supply duct. as well as A power supply battery is disposed in the housing and is electrically connected to the main control board to supply power to the main control board; The ceramic heating element is ring-shaped and has two wiring portions and two heating portions connected between the two wiring portions. The two heating portions are symmetrically arranged about the line connecting the two wiring portions. The heating element is arranged in multiple bends in the circumferential direction of the ceramic heating element to form multiple ventilation grooves on both the inner and outer sides of the heating element. The ventilation grooves are arranged through both ends in the axial direction of the ceramic heating element.

2. The hair dryer as described in claim 1, characterized in that, The hair dryer also includes a charging component. The main control board is equipped with a charging circuit. The charging component is located in the housing. Both the power supply battery and the charging component are electrically connected to the charging circuit.

3. The hair dryer as described in claim 2, characterized in that, The charging component is an interface female, and the housing is provided with a mounting hole, with the interface female located in the mounting hole; or, the charging component is a wireless charging coil, with the wireless charging coil located inside the housing.

4. The hair dryer as described in claim 1, characterized in that, The power supply battery is located at least partially within the air supply duct; the main control board is located on one side of the power supply battery and within the air supply duct.

5. The hair dryer as described in claim 4, characterized in that, The housing has a grip portion and an air outlet portion located at one end of the grip portion. The hair dryer also includes a filter assembly. The air outlet is located at the air outlet portion, and the air inlet is located at the end of the grip portion away from the air outlet portion. The filter assembly covers the air inlet portion, and the power supply battery portion is located inside the filter assembly.

6. The hair dryer as described in claim 1, characterized in that, The hair dryer also includes a first support plate and a second support plate. The first support plate has two first slots and a slot located between the two first slots. The second support plate has two second slots and a plug-in part located between the two second slots. The plug-in part is inserted into the slot. One of the heating elements is inserted into one of the first slots and one of the second slots, and the other heating element is inserted into the other first slot and the other second slot.

7. The hair dryer as described in claim 6, characterized in that, Both the first support plate and the second support plate are located in the ventilation slot outside the heating element; Both the first support plate and the second support plate protrude from the outer peripheral surface of the ceramic heating element; The hair dryer also includes a heat insulation cylinder, which is sleeved on the ceramic heating body, and the first support plate and the second support plate abut against the inner wall of the heat insulation cylinder.

8. The hair dryer as described in any one of claims 1 to 7, characterized in that, The air supply duct includes a first air duct extending in the vertical direction and a second air duct extending in the front-back direction. The second air duct connects the first air duct and the air outlet. The second air duct is arc-shaped and gradually bends from the first air duct toward the air outlet to connect the first air duct and the air outlet.

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