Hair dryer

Abstract

The utility model discloses a hair drier which comprises an outer shell, a fan assembly, a heating device and an air guide shell, the outer shell comprises a handheld part extending in the vertical direction and an air outlet part arranged at one end of the handheld part and extending in the front-back direction, an air outlet is formed in one end of the air outlet part, and the handheld part is provided with a handle air channel; the fan assembly is arranged in the handle air duct; the heating device comprises a first ceramic heating body, and at least part of the first ceramic heating body is arranged in the handle air duct; the air guide shell is arranged in the air outlet part, the air guide shell is provided with a flow guide air duct, and the flow guide air duct is arranged in an arc shape and is gradually bent from the handle air duct to the air outlet so as to communicate the handle air duct with the air outlet. According to the technical scheme, the air outlet effect can be improved.

Description

Technical Field

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

[0002] Traditional hair dryers typically feature a front-to-back air duct above the handle. However, with recent technological advancements, hair dryer styles have expanded. For example, many hair dryers now feature a handle-mounted air intake, with the air duct located within the handle and the air inlet at the end. However, because the handle air duct is typically perpendicular to the upper air duct, the airflow from the handle duct to the upper air duct impinges on the inner wall of the upper duct, disrupting the airflow and increasing airflow loss, impacting airflow quality. Utility Model Content

[0003] The main purpose of the utility model is to provide a hair dryer, aiming to improve the air output effect.

[0004] To achieve the above-mentioned purpose, the hair dryer proposed by the present invention comprises:

[0005] The housing includes a handle extending in the up-down direction and an air outlet provided at one end of the handle and extending in the front-to-back direction, wherein one end of the air outlet has an air outlet, and the handle is provided with a handle air duct;

[0006] A fan assembly is provided in the handle air duct;

[0007] A heating device comprising a first ceramic heating element, wherein the first ceramic heating element is at least partially disposed in the handle air duct; and

[0008] An air guide shell is provided in the air outlet portion, and the air guide shell has an air guide duct. The air guide duct is arranged in an arc shape and gradually bends from the handle air duct toward the air outlet to connect the handle air duct and the air outlet.

[0009] Optionally, the air guide duct has an inlet and an outlet, and the outlet is offset relative to the inlet in the left-right direction.

[0010] Optionally, the air guide shell is arranged in an arc shape as a whole, and a mounting cavity is formed between the side of the air guide shell facing away from the air outlet and the outer shell.

[0011] Optionally, the hair dryer further includes a circuit assembly, and the circuit assembly is at least partially disposed in the mounting cavity.

[0012] Optionally, the housing includes a front shell and a rear shell, the front shell and the rear shell are enclosed to form the air outlet, and the installation cavity is located between the rear shell and the air guide shell.

[0013] Optionally, the first ceramic heating element is annular and has two wiring parts and two heating parts connected between the two wiring parts, and the two heating parts are symmetrically arranged about the line connecting the two wiring parts.

[0014] Optionally, the heating device further includes an insulating tube and a mounting bracket, the first ceramic heating element is mounted on the mounting bracket, the insulating tube is sleeved outside the mounting bracket and the first ceramic heating element, and a ventilation gap is formed between the outer peripheral surface of the first ceramic heating element and the inner wall of the insulating tube.

[0015] Optionally, the heating portion is bent in multiple sections in the circumferential direction of the first ceramic heating element to form multiple ventilation grooves on the inner and outer sides of the heating portion, and the ventilation grooves are through-set at both ends in the up and down directions.

[0016] Optionally, the heating device further includes two conductive members, each of which is connected to a corresponding wiring portion to be electrically connected to the wiring portion.

[0017] Optionally, the first ceramic heating element is provided at the connection between the handle air duct and the guide air duct.

[0018] Optionally, the heating device further includes a second ceramic heating element, which is disposed in the air guide duct, and the second ceramic heating element is disposed close to the air outlet or close to the air guide duct.

[0019] The beneficial effect of the present invention is that by setting the guide air duct between the handle air duct and the air outlet to an arc shape that gradually bends from the handle air duct toward the air outlet, when the airflow flows from the handle air duct to the guide air duct, the arc-shaped wall surface of the guide air duct can be used to gradually guide the airflow to the air outlet, thereby avoiding the situation where the airflow vertically hits the inner wall surface of the guide air duct and causes airflow turbulence, reducing wind speed attenuation, and improving the air outlet effect. At the same time, since the first ceramic heating element is an overall heating structure with high heating efficiency, the size of the first ceramic heating element can be made smaller, so that the handle air duct can be used to install the first ceramic heating element, so that the airflow flows through the first ceramic heating element before flowing into the guide air duct, avoiding the airflow being blocked by the first ceramic heating element during the process of changing the flow direction, thereby reducing the flow speed attenuation amplitude of the airflow during the process of changing the flow direction, and improving the air outlet effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a structural diagram of an embodiment of a hair dryer of the present utility model;

[0022] Figure 2 for Figure 1 Front view of the middle hair dryer;

[0023] Figure 3 for Figure 2 A cross-sectional view of the middle hair dryer at position XX;

[0024] Figure 4 for Figure 3 Schematic diagram of the structure of the stroke shell;

[0025] Figure 5 for Figure 4 Anterior view of the stroke shell;

[0026] Figure 6 for Figure 3 A schematic structural diagram of the first ceramic heating element;

[0027] Figure 7 for Figure 6 A top view of the first ceramic heating element, the heat insulating tube, and the mounting bracket;

[0028] Figure 8 for Figure 1 Exploded view of the middle shell.

[0029] Description of Figure Numbers:

[0030] 10. Casing; 11. Hand-held part; 111. Handle air duct; 112. Air inlet; 12. Air outlet; 121. Air outlet; 13. Mounting cavity; 14. Front shell; 15. Rear shell; 16. Handle shell; 20. Air guide shell; 21. Air guide duct; 22. Inlet; 23. Outlet; 31. First ceramic heating element; 311. Wiring part; 312. Heating part; 313. Ventilation slot; 32. Conductive part; 33. Mounting bracket; 34. Insulation tube; 40. Fan assembly; 51. Main control board; 60. Battery.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B as an example", it includes 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 this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually 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 present invention.

[0035] The utility model provides a hair dryer.

[0036] In the embodiment of the present utility model, Figures 1 to 8 As shown, the hair dryer includes a housing 10, a fan assembly 40, a heating device and an air guide shell 20. The housing 10 includes a handle portion 11 extending in the vertical direction and an air outlet portion 12 provided at one end of the handle portion 11 and extending in the front-to-back direction. One end of the air outlet portion 12 has an air outlet 121. The handle portion 11 is provided with a handle air duct 111. The fan assembly 40 is provided in the handle air duct 111.

[0037] The heating device includes a first ceramic heating element 31, which is at least partially disposed in the handle air duct 111; the air guide shell 20 is disposed in the air outlet portion 12, and the air guide shell 20 has a guide air duct 21, which is arranged in an arc shape and gradually bends from the handle air duct 111 toward the air outlet 121 to connect the handle air duct 111 and the air outlet 121.

[0038] Specifically, the handle 11 is provided with an air inlet 112, which is connected to the end of the handle air duct 111 away from the guide air duct 21. The fan assembly 40 is located between the air inlet 112 and the guide air duct 21. The air outlet 121 is spaced apart from the handle air duct 111 in the front-to-back direction, that is, the guide air duct 21 gradually bends forward from the handle air duct 111 to the air outlet 121.

[0039] The first ceramic heating element 31 is a heating structure as a whole, that is, there are at least two spaced-apart wiring portions 311 on the first ceramic heating element 31, which are connected to the main control board 51 through the wiring portions 311. After the power is turned on, current flows through the first ceramic heating element 31, thereby converting electrical energy into thermal energy and transferring the heat to the surface of the first ceramic heating element 31. When air flows through the first ceramic heating element 31, the airflow and the first ceramic heating element 31 can exchange heat, thereby heating the airflow flowing through the first ceramic heating element 31. Compared with electric heating wires, the first ceramic heating element 31 has a high heating efficiency, which can make the size of the first ceramic heating element 31 smaller, thereby reducing the space occupied by the first ceramic heating element 31 in the hair dryer. Moreover, the first ceramic heating element 31 will not melt even if used for a long time, and has a longer service life.

[0040] The technical solution of the present invention is to set the guide air duct 21 between the handle air duct 111 and the air outlet 121 to be an arc that gradually bends from the handle air duct 111 to the air outlet 121. When the airflow flows from the handle air duct 111 to the guide air duct 21, the arc-shaped wall surface of the guide air duct 21 can be used to gradually guide the airflow to the air outlet 121, thereby avoiding the situation where the airflow vertically hits the inner wall surface of the guide air duct 21 and causes airflow turbulence, reducing wind speed attenuation and improving the air outlet effect. At the same time, since the first ceramic heating element 31 is an overall heating structure with high heating efficiency, the size of the first ceramic heating element 31 can be made smaller, so that the first ceramic heating element 31 can be installed using the handle air duct 111, so that the airflow flows through the first ceramic heating element 31 before flowing into the guide air duct 21, avoiding the airflow being obstructed by the first ceramic heating element 31 during the process of changing the flow direction, thereby reducing the flow speed attenuation amplitude of the airflow during the process of changing the flow direction, and improving the air outlet effect.

[0041] In some embodiments, the guide air duct 21 has an inlet 22 and an outlet 23, with the outlet 23 offset in the left-right direction relative to the inlet 22. That is, the guide air duct 21 curves and extends from the handle air duct 111 toward the air outlet 121 in the front-to-back direction, while also curves and extends in the left-to-right direction toward the air outlet 121. The inlet 22 corresponds to the handle air duct 111, and the outlet 23 corresponds to the air outlet 121. This can guide the airflow in the guide air duct 21 to spiral toward the air outlet 121, further reducing the airflow from hitting the inner wall of the handle air duct 111 and improving the airflow guidance effect.

[0042] In some embodiments, the air guide housing 20 is generally arc-shaped, with a mounting cavity 13 formed between the side of the air guide housing 20 facing away from the air outlet 121 and the housing 10. That is, both the air guide housing 20 and the handle air duct 111 are arc-shaped, and the outer shape of the air guide housing 20 is adapted to the shape of the handle air duct 111, so that the thickness of the air guide housing 20 at all locations (the thickness between the outer surface of the air guide housing 20 and the inner wall of the handle air duct 111) is similar. This simplifies the structure and size of the air guide housing 20, thereby reducing the space occupied by the air guide housing 20 within the housing 10. The mounting cavity 13 formed between the air guide housing 20 and the housing 10 can be used to install other components, thereby improving the compactness of the structure.

[0043] In some embodiments, the hair dryer further includes a circuit assembly, which is at least partially located within the mounting cavity 13. Using the mounting cavity 13 to house the circuit assembly enhances the hair dryer's structural compactness, facilitating a miniaturized hair dryer design. Of course, in other embodiments, a display screen or other functional components may also be located within the mounting cavity 13.

[0044] In some embodiments, the housing 10 includes a front shell 14 and a rear shell 15 , which together form the air outlet 12 , and the mounting cavity 13 is located between the rear shell 15 and the air guide shell 20 . Specifically, the front shell 14 and the rear shell 15 are arranged front to back. During installation, the air duct shell is first mounted on the front shell 14 or the rear shell 15 , and then the front shell 14 and the rear shell 15 are connected and fixed. This facilitates assembly and makes the front shell 14 and the rear shell 15 simple and easy to form. Of course, in other embodiments, the housing 10 includes a left shell and a right shell, which are arranged left to right and together form the air outlet 12 .

[0045] Optionally, the shell 10 also includes a handle shell 16, and the handle shell 16, the front shell 14 and the rear shell 15 are formed separately, and the handle shell 16 connects the front shell 14 and the rear shell 15 and has a gripping portion, that is, the handle shell 16, the front shell 14 and the rear shell 15 can be formed separately and then assembled together, so that the structures of the handle shell 16, the front shell 14 and the rear shell 15 are relatively simple and easy to produce.

[0046] In some embodiments, the first ceramic heating element 31 is annular and has two wiring parts 311 and two heating parts 312 connected between the two wiring parts 311, and the two heating parts 312 are symmetrically arranged about the connection line of the two wiring parts 311. Specifically, the circuit component includes a main control board 51, and the two wiring parts 311 are electrically connected to the main control board 51, wherein one wiring part 311 is used to connect the positive pole of the power supply, and the other wiring part 311 is used to connect the negative pole of the power supply. After the power is turned on, current flows through the two heating parts 312, thereby converting electrical energy into thermal energy. When air flows through the surface of the heating part 312, the air flow can be heat-exchanged with the heating part 312, thereby heating the air flow flowing through the ceramic heating element. By arranging the two heating parts 312 symmetrically about the connection line of the two wiring parts 311, the length and cross-section of the two heating parts 312 can be made to be roughly the same. When current is passed through, the two heating parts 312 can be heated evenly, so that the air flow in the air outlet duct is heated evenly, thereby improving the heat exchange effect.

[0047] Optionally, the heating portion 312 is bent in multiple sections along the circumferential direction of the ceramic heating element, thereby forming multiple ventilation slots 313 on both the inner and outer sides of the heating portion 312. The ventilation slots 313 are arranged to extend vertically from both ends. This can increase the surface area of ​​the heating portion 312, thereby improving heat exchange efficiency. In other embodiments, the heating portion 312 is provided with multiple vias, each of which extends vertically from both ends.

[0048] Of course, in other embodiments, the ceramic heating element includes an inner ring portion, an outer ring portion with a spacer ring disposed outside the inner ring portion, and multiple connecting portions connecting the inner and outer ring portions. The multiple connecting portions are spaced apart circumferentially around the inner ring portion, and heat exchange holes are formed between any two adjacent connecting portions. This increases the surface area of ​​the ceramic heating element and improves heat exchange efficiency.

[0049] In some embodiments, the heating device further includes an insulating tube 34 and a mounting bracket 33, the first ceramic heating element 31 is mounted on the mounting bracket 33, the insulating tube 34 is sleeved outside the mounting bracket 33 and the first ceramic heating element 31, and a ventilation gap is formed between the outer peripheral surface of the first ceramic heating element 31 (i.e., the outer side surface of the heating portion 312) and the inner wall of the insulating tube 34. Specifically, a portion of the mounting bracket 33 protrudes toward the outer peripheral surface of the first ceramic heating element 31 to ensure that when the mounting bracket 33 is installed in the insulating tube 34, the outer peripheral surface of the first ceramic heating element 31 is spaced apart from the inner wall of the insulating tube 34. With such an arrangement, when the airflow flows through the first ceramic heating element 31, the airflow can pass through both the inner and outer sides of the first ceramic heating element 31 at the same time, and the inner and outer surfaces of the first ceramic heating element 31 can be fully utilized for heat exchange with the airflow, thereby improving the heat exchange efficiency.

[0050] Optionally, the first ceramic heating element 31 is a silicon carbide ceramic heating element. Specifically, the silicon carbide ceramic heating element is made of silicon carbide ceramic material. By adopting the silicon carbide ceramic heating element as the first ceramic heating element 31, the heating efficiency of the first ceramic heating element 31 can be improved and the heating rate can be increased. Among them, the silicon carbide ceramic heating element can use silicon carbide powder as the main sintering phase raw material and mix it 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 shape and sinter it 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 the mixture is uniformly mixed using a ball mill, and then spray-dried. The dried powder is heated and mixed with paraffin wax in a certain mass ratio, and poured into a hot die casting machine to complete the hot die casting. After the green body is dried, it is placed in a sintering furnace for sintering to obtain a silicon carbide ceramic heating element. Of course, in other embodiments, zirconium oxide, aluminum oxide, yttrium oxide, silicon oxide or silicon nitride can also be used as the main sintering phase raw materials.

[0051] In some embodiments, the heating device further includes two conductive members 32, each of which is clamped to a corresponding connection portion 311 to electrically connect to the connection portion 311. That is, the conductive members 32 are formed separately from the first ceramic heating element 31. This arrangement can simplify the structure of the first ceramic heating element 31, facilitate the molding of the first ceramic heating element 31, and reduce production difficulty and cost. The conductive members 32 can be clamped to the connection portion 311 using clips or screws, or they can be welded to the connection portion 311 to ensure reliable connection.

[0052] In some embodiments, the circuit assembly includes a main control board 51, and the hair dryer also includes a battery 60 and a charging component. The battery 60, the charging component and the blower assembly 40 are all electrically connected to the main control board 51, and the battery 60 and the main control board 51 are arranged in the handle air duct 111. That is, the blower assembly 40 and the heating device can be powered by the battery 60, which reduces the constraints of the power cord and is convenient for use in environments such as outdoors where wiring is inconvenient. Moreover, when the heating device adopts a ceramic heating element, the power consumption of the handheld hair dryer can be lower, and when powered by the battery 60, the battery life is longer, which is convenient for users to use. Among them, the charging component can be an interface socket (such as a Type-C socket) or a wireless charging coil, etc.

[0053] In some embodiments, the first ceramic heating element 31 is arranged at the connection between the handle air duct 111 and the guide air duct 21; in this way, the first ceramic heating element 31 can be close to the air outlet 121, shortening the flow path of the hot air flow from the first ceramic heating element 31 to the air outlet 121, thereby reducing heat loss and preventing the hot air flow from flowing through the fan assembly 40, thereby preventing the fan assembly 40 from overheating.

[0054] Optionally, the heating device further includes a second ceramic heating element, which is disposed in the guide air duct 21 and is disposed near the air outlet 121 or near the handle air duct 111. This allows the air to be reheated by the second ceramic heating element, thereby increasing the airflow temperature rise rate. By disposing the second ceramic heating element near the air outlet 121 or near the handle air duct 111, the effect of the second ceramic heating element on the airflow can be reduced. The material and shape of the second ceramic heating element can be consistent with those of the first ceramic heating element 31.

[0055] 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 comprises a handheld portion extending in the vertical direction and an air outlet portion provided at one end of the handheld portion and extending in the front-to-back direction, wherein one end of the air outlet portion has an air outlet, and the handheld portion is provided with a handle air duct; A fan assembly is provided in the handle air duct; A heating device comprising a first ceramic heating element, wherein the first ceramic heating element is at least partially disposed in the handle air duct; and An air guide shell is provided in the air outlet portion, and the air guide shell has an air guide duct. The air guide duct is arranged in an arc shape and gradually bends from the handle air duct toward the air outlet to connect the handle air duct and the air outlet.

2. The hair dryer according to claim 1, wherein The air guide duct has an inlet and an outlet, and the outlet is offset from the inlet in the left-right direction.

3. The hair dryer according to claim 1, wherein The air guide shell is arranged in an arc shape as a whole, and a mounting cavity is formed between the side of the air guide shell facing away from the air outlet and the outer shell.

4. The hair dryer according to claim 3, wherein The hair dryer further includes a circuit assembly, which is at least partially disposed in the mounting cavity.

5. The hair dryer according to claim 3, wherein The housing includes a front shell and a rear shell, the front shell and the rear shell together form the air outlet, and the installation cavity is located between the rear shell and the air guide shell.

6. The hair dryer according to claim 1, wherein The first ceramic heating element is ring-shaped and has two connecting parts and two heating parts connected between the two connecting parts. The two heating parts are symmetrically arranged about the line connecting the two connecting parts.

7. The hair dryer according to claim 6, wherein The heating device also includes an insulation tube and a mounting bracket. The first ceramic heating element is mounted on the mounting bracket. The insulation tube is sleeved outside the mounting bracket and the first ceramic heating element. A ventilation gap is formed between the outer peripheral surface of the first ceramic heating element and the inner wall of the insulation tube.

8. The hair dryer according to claim 6, wherein The heating device further includes two conductive members, each of which is connected to a corresponding wiring portion to be electrically connected to the wiring portion.

9. The hair dryer according to claim 1, wherein The first ceramic heating element is provided at the connection between the handle air duct and the guide air duct; The heating device further includes a second ceramic heating element, which is disposed in the guide air duct. The second ceramic heating element is disposed close to the air outlet or close to the handle air duct.

10. The hair dryer according to claim 9, wherein The hair dryer also includes a main control board, a battery and a charging component. The battery, the charging component and the blower assembly are all electrically connected to the main control board; the battery and the main control board are arranged in the handle air duct.

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