CN211932981U - Hair dryer - Google Patents

Abstract

The utility model discloses a hair dryer, wherein the hair dryer comprises a shell, and the shell is provided with a main control board; the power line is connected to the shell and extends out of the shell; and the conductive metal sheet is fixed on the inner wall of the shell and used for electrically connecting the main control board and the power line. The utility model discloses technical scheme aims at reducing the volume of hair-drying device effectively to make things convenient for the user to grip, has improved the operation when the installation of hair-drying device and maintenance simultaneously, and then has improved hair-drying device usability.

Description

Hair dryer

Technical Field

The utility model relates to a household electrical appliances technical field, in particular to hair dryer.

Background

In the related art, the hair dryer is usually internally provided with a plurality of cables to electrically connect the parts, and the size of the cable is limited, so that the size of a handle held by a user cannot be effectively reduced, and meanwhile, the arrangement of the cables is not beneficial to the operation of the user during installation and disassembly, and the usability of the hair dryer is reduced.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a hair dryer aims at reducing the volume of hair dryer effectively to make things convenient for the user to grip, operation when having improved the installation of hair dryer and maintenance simultaneously, and then has improved hair dryer usability.

In order to achieve the above object, the utility model provides a hair dryer, include:

the shell is provided with a main control board;

the power line is connected to the shell and extends out of the shell; and

the conductive metal sheet is fixed on the inner wall of the shell and used for enabling the main control board to be electrically conducted with the power line.

In an embodiment of this application, the power cord has live wire terminal and zero line terminal, the quantity of electrically conductive sheetmetal is two, two electrically conductive sheetmetal respectively with live wire terminal with the zero line terminal is connected, two electrically conductive sheetmetal symmetry is located the internal face of casing.

In an embodiment of the present application, the conductive metal sheet and the inner wall of the housing are an integral structure;

and/or the conductive metal sheet is a copper sheet.

In an embodiment of the application, an oxidation preventing layer is formed on a portion of the conductive metal sheet exposed outside the inner wall surface of the housing.

In an embodiment of the application, the casing includes main part and handle, the main part with the handle is connected, electrically conductive sheetmetal is located the internal face of handle, the main control board is located in the main part, the power cord connect in the handle deviates from the one end of main part.

In an embodiment of the present application, the hair dryer further comprises an operating switch slidably disposed on the handle and located between the main body and the conductive metal plate, wherein the operating switch is slid to make the main body and the conductive metal plate have a connected and disconnected state.

In an embodiment of this application, hair dryer still includes the fan, the air intake has been seted up to the handle, the air outlet has been seted up to the main part, the fan is located in the handle, and with main control board electric connection, the fan is used for following external fluid inhales in the air intake.

In an embodiment of this application, hair dryer still includes first filter sleeve, first filter sleeve cover is established and is fixed in the handle to cover the air intake, first filter sleeve has seted up a plurality of first filtration pores, first filtration pore is used for filtering external fluid.

In an embodiment of this application, the handle deviates from the protruding a plurality of butt archs that are equipped with of one end of main part, when first filter sleeve cover was located the handle, a plurality of butt archs were used for spacing to support and hold first filter sleeve.

In an embodiment of this application, hair dryer still includes the second and filters the sleeve, the second filters the sleeve and has seted up a plurality of second and filter the hole, the second filter the sleeve connect in the handle deviates from the one end of main part, just the second filter the telescopic internal surface with the first surface butt that filters the sleeve makes the second filter the hole with first filtration hole sets up relatively, the aperture of first filtration hole is less than the aperture of second filtration hole.

This application still provides a hair dryer, the hair dryer includes:

the device comprises a shell, a handle and a main control board, wherein the shell comprises a host and the handle;

the power cord is connected to the handle and extends out of the handle;

the conductive metal sheet is fixed on the inner wall of the handle and used for electrically communicating the main control board and the power line; and

the fan is arranged in the handle and electrically connected with the main control board, and the central axis of the fan coincides with the central axis of the handle in the extending direction of the handle.

The utility model discloses technical scheme's hair dryer includes casing and power cord, and this casing is equipped with the main control board, and outside this power cord was connected in the casing and stretched out the casing, still was equipped with conductive metal piece simultaneously, and the internal face of casing is located in the fixed subsides of this conductive metal piece, and conductive metal piece is used for making main control board and power cord electrical property switch on. So, realize the electrical property through setting up the electrically conductive sheetmetal and replacing many cables and switch on, thereby saved the wiring space in the hair dryer casing, and then can the corresponding size that reduces the hair dryer, improve the use that the user gripped the hair dryer and felt, secondly when dismantling the hair dryer and maintain, the electrically conductive sheetmetal is difficult to influence user's maintenance operation, simultaneously because the electrically conductive sheetmetal is fixed in the inner wall of casing, consequently the electrically conductive sheetmetal is difficult for rocking when the hair dryer uses, and then improved the usability of hair dryer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of the hair dryer of the present invention;

fig. 2 is a schematic view of the explosion structure of the hair dryer of the present invention;

FIG. 3 is an assembly view of the structure of the hair dryer of the present invention;

FIG. 4 is a schematic view of the structure of the hair dryer of the present invention in which a conductive metal plate is mounted on the housing;

FIG. 5 is a schematic view of the assembly structure of the handle and the operation button of the hair dryer of the present invention;

FIG. 6 is a schematic view of a first filter sleeve of the hair dryer of the present invention;

fig. 7 is a schematic view of a second filter sleeve of the hair dryer of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Hair dryer	20	Power line
10	Shell body	30	Conductive metal sheet
				11	Main body	40	Operating switch
112	Air outlet	50	First filtering sleeve
				12	Handle (CN)	51	The first filtering hole
121	Air inlet	60	Second filter sleeve
				122	Abutting projection	61	Second filtering hole
123	Arc-shaped shell	70	Outer casing

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a hair dryer 100.

Referring to fig. 1 to 4, in the embodiment of the present invention, the hair dryer 100 includes a housing 10, a power line 20 and a conductive metal sheet 30, wherein the housing 10 is provided with a main control board (not shown); the power line 20 is connected to the housing 10 and extends out of the housing 10; the conductive metal sheet 30 is fixedly attached to the inner wall surface of the housing 10, and the conductive metal sheet 30 is used for electrically connecting the main control board and the power line 20.

The main control board may be a PCB circuit board, so that each electrical component in the hair dryer 100 can be electrically controlled by the PCB circuit board, and one end of the conductive metal sheet 30 may be connected to the PCB circuit board, and the other end thereof is connected to the power line 20, so as to electrically connect the PCB circuit board and the power line 20. When the distance between the installation position of the PCB and the conductive metal sheet 30 is far, the PCB and the conductive metal sheet 30 can be electrically conducted by arranging a short section of electric wire, and the electric wire is flexibly arranged in the shell 10 to adapt to the far distance between the PCB and the conductive metal sheet 30. Wherein, this electrically conductive sheetmetal 30 can be the setting of C style of calligraphy, and electrically conductive sheetmetal 30 both ends are formed with the arch that deviates from the casing 10 surface promptly, so can make power cord 20 and main control board be connected with electrically conductive sheetmetal 30 more easily through the arch at both ends, and the arch can also play the effect that makes electrically conductive sheetmetal 30 be convenient for install the location simultaneously. In addition, in order to improve the safety of using the hair dryer 100, the housing 10 may be made of plastic, such as: ABS, POM, PS, PMMA, PC, PET, etc., but other insulating materials may be used. Thus, when the hair dryer 100 is electrically leaky, the user will not easily get an electric shock by holding the handle 12, which improves the safety of the user in using the hair dryer 100. It should be noted that, the conductive metal sheet 30 is fixed to the inner wall of the housing 10, and the conductive metal sheet 30 may be attached to the inner wall of the housing 10 for convenient installation, or a part of the conductive metal sheet 30 is embedded in the inner wall of the housing 10, and then two ends of the conductive metal sheet extend out of the inner wall of the housing and are electrically connected to the main control board and the power line 20, so as to ensure the stability of fixing the conductive metal sheet 30.

The utility model discloses technical scheme's hair dryer 100 includes casing 10 and power cord 20, and this casing 10 is equipped with the main control board, and outside this power cord 20 connected in casing 10 and stretched out casing 10, still was equipped with conductive metal piece 30 simultaneously, and the internal face of casing 10 is located in the fixed subsides of this conductive metal piece 30, and conductive metal piece 30 is used for making main control board and power cord 20 electrical property switch on. So, realize the electrical property through setting up electrically conductive sheetmetal 30 and replacing many cables and switch on, thereby saved the wiring space in the dry hair ware 100 casing 10, and then can corresponding reduction dry hair ware 100's size, improve the use that the user gripped dry hair ware 100 and felt, secondly when dismantling dry hair ware 100 and maintain, electrically conductive sheetmetal 30 is difficult to influence user's maintenance operation, simultaneously because electrically conductive sheetmetal 30 is fixed pastes in the internal face of casing 10, consequently electrically conductive sheetmetal 30 is difficult for rocking when dry hair ware 100 uses, and then improved dry hair ware 100's usability.

In an embodiment of the present application, referring to fig. 2 to 5, the power line 20 has a live wire terminal (not shown) and a neutral wire terminal (not shown), the number of the conductive metal sheets 30 is two, two the conductive metal sheets 30 are respectively connected with the live wire terminal and the neutral wire terminal, and two the conductive metal sheets 30 are symmetrically disposed on the inner wall surface of the housing 10. Specifically, in order to further improve the safety of using hair dryer 100, two conductive metal sheets 30 are respectively connected with the live wire terminal and the zero line terminal of power cord 20, so that two conductive metal sheets 30 are matched to completely conduct main control board and power cord 20, the whole electric circuit of hair dryer 100 is safe and reasonable, and the use safety of hair dryer 100 is further improved. Meanwhile, in order to further enable the internal structure of the shell 10 to be reasonable, the two conductive metal sheets 30 can be symmetrically arranged on the inner wall surface of the shell 10, so that the whole stress of the shell 10 is balanced, the internal space of the shell 10 is arranged compactly and reasonably, a certain distance exists between the two conductive metal sheets 30 which are respectively connected with the live wire terminal and the zero wire terminal of the power line 20, danger caused by the distance between the two conductive metal sheets is avoided, and the use safety of the hair dryer 100 is improved.

In an embodiment of the present application, referring to fig. 2 to 4, the conductive metal sheet 30 is integrated with the inner wall of the handle 12; wherein, casing 10 accessible injection moulding, and can place electrically conductive sheetmetal 30 in the mold processing in advance simultaneously to make casing 10 and electrically conductive sheetmetal 30 through the integrated into one piece that moulds plastics, not only saved electrically conductive sheetmetal 30's installation, guarantee the stability that electrically conductive sheetmetal 30 and casing 10 are connected simultaneously, make electrically conductive sheetmetal 30 be difficult to drop, guarantee main control board and power cord 20's electric connection.

Optionally, the conductive metal sheet 30 is a copper sheet. Specifically, since copper has better conductivity, the conductive metal sheet 30 may be a copper sheet, so as to ensure the electrical connection between the main control board of the hair dryer 100 and the power line 20, it should be noted that the conductive metal sheet 30 may also be an aluminum sheet or an iron sheet, which may be specifically selected by those skilled in the art and will not be described herein.

In an embodiment of the present application, an oxidation preventing layer is formed on a portion of the conductive metal sheet 30 exposed outside the inner wall surface of the housing 10. Since the conductive metal sheet 30 is exposed to the outside for a long time and is easily oxidized, resulting in a decrease in the conductivity, an oxidation preventing layer is formed on the portion of the conductive metal sheet 30 exposed outside the inner wall surface of the casing 10, which not only effectively prevents the conductive metal sheet 30 from being oxidized, but also increases the conductivity, wherein the oxidation preventing layer may be a nickel-plated layer or other similar structure, which may be specifically selected by those skilled in the art and will not be further described herein.

In an embodiment of the present application, referring to fig. 1, 2 and 5, the housing 10 includes a main body 11 and a handle 12, the main body 11 is connected to the handle 12, the conductive metal sheet 30 is disposed on an inner wall surface of the handle 12, the main control board is disposed in the main body 11, and the power cord 20 is connected to an end of the handle 12 away from the main body 11. Wherein, can be equipped with heating structure such as heater strip in the main part 11, accessible main control board control heater strip is worked so to make the fluid that flows in from air intake 121 discharge from air outlet 112 after the heater strip heating, in order to satisfy when the hot-blast condition of user's needs, this handle 12 can be connected by the arc casing 123 that two symmetries set up and form, and the cooperation of connecting through two arc casings 123 is so that handle 12 is cylindric, thereby the user's of being more convenient for grips. For simple to operate, two arc casing 123 casings 10 accessible buckle connection are fixed, certainly also can connect through modes such as screw connection, and for the rationality that sets up, can all set up electrically conductive sheetmetal 30 on two arc casings 123 respectively to can connect the live wire terminal and the zero line terminal of power cord 20 respectively, also make things convenient for the later stage to maintain alone each electrically conductive sheetmetal 30 simultaneously. Meanwhile, in order to further prolong the service life of the handle 12, the hair dryer 100 further comprises a shell 70, the shell 70 is sleeved on the outer surface of the handle 12, the shell 70 can effectively wrap and protect the handle 12, and the hand feeling of a user for holding can be correspondingly improved. In addition, in order to increase the functionality of the hair dryer 100, a negative ion structure may be disposed in the handle 12 to treat the fluid sucked by the blower, so that the fluid discharged from the air outlet 112 is cleaner and meets the user's requirements.

In an embodiment of the present application, the hair dryer 100 further includes an operating switch 40, the operating switch 40 is slidably disposed on the handle 12 and located between the main body 11 and the conductive metal sheet 30, and the operating switch 40 is slid to connect and disconnect the main body 11 and the conductive metal sheet 30. Wherein, the operation switch 40 is slidably disposed in the handle 12, specifically, both ends of the operation switch 40 are connection ends, the two connection ends can move relative to the handle 12, one connection end is always in a connection and conduction state with the main body 11, and the other connection section is in a disconnection state with the conductive metal sheet 30, when a user wants to use the hair dryer 100, the operation switch 40 is slid to make the connection end of the operation switch 40 departing from the main body 11 abut against the conductive metal sheet 30, so as to realize the electrical conduction of the operation switch 40 and the conductive metal sheet 30, further to make the main body 11 and the conductive metal sheet 30 in a connection state, so as to realize the normal operation of the hair dryer 100, when the operation switch 40 slides to an initial position, the operation switch 40 is separated from the conductive metal sheet 30, so as to make the main body 11 and the conductive metal sheet 30 in a disconnection state, so as to stop the operation of the hair dryer 100, therefore, the user can control the on and off of the hair dryer 100 by sliding the operation switch 40, which is convenient and fast, it should be noted that the operation switch 40 may be in a state of being always abutted to the conductive metal sheet 30, and the operation switch 40 is abutted to and separated from the main body 11 by sliding the operation switch 40, so that the switching between the connection state and the disconnection state of the main body 11 and the conductive metal sheet 30 can be realized, it should be noted that the operation switch 40 is also connected to the main control board, so that the operation switch 40 can also adjust the functions of wind speed, temperature and the like, and the selection can be specifically performed according to the technical personnel in the field, and the description is not repeated.

Referring to fig. 1, 2 and 5, in an embodiment of the present application, the hair dryer 100 further includes a blower (not shown), the handle 12 defines an air inlet 121, the main body 11 defines an air outlet 112, the blower is located in the handle 12 and electrically connected to the main control board, and the blower is configured to suck an external fluid from the air inlet 121. Specifically, through locating the fan in handle 12 with this be close to air intake 121 to can go on external fluid from air intake 121 more effectively, and wherein this fan can specifically drive the blade for the motor and rotate the suction, locate handle 12 with the fan simultaneously, effectively reduce the weight of main part 11, make when making the user grip handle 12 hair-dryer 100 whole more stable, be convenient for hair-dryer 100's use.

Further, referring to fig. 6, the hair dryer 100 further includes a first filtering sleeve 50, the first filtering sleeve 50 is fixed to the handle 12 in a sleeving manner and covers the air inlet 121, the first filtering sleeve 50 is provided with a plurality of first filtering holes 51, and the first filtering holes 51 are used for filtering the external fluid. Wherein, filter external fluid through setting up first filter sleeve 50 to guarantee the clean degree of the fluid that flows into in handle 12, avoided the foreign matter to flow into in handle 12 simultaneously and lead to damaging hair dryer 100, and then guaranteed the use of hair dryer 100.

Furthermore, a plurality of abutting protrusions 122 are convexly arranged at one end of the handle 12 away from the main body 11, and when the first filtering sleeve 50 is sleeved on the handle 12, the plurality of abutting protrusions 122 are used for limiting and abutting against the first filtering sleeve 50. Wherein, but a plurality of butt protruding 122 symmetry sets up the one end that deviates from main part 11 at handle 12 to when handle 12 back is located to first filter sleeve 50 cover, a plurality of butt protruding 122 can the fixed first filter sleeve 50 of butt, and the atress balance when guaranteeing the butt simultaneously makes first filter sleeve 50 installation back difficult rocking, has improved the stability of the installation of first filter sleeve 50.

In an embodiment of the present application, referring to fig. 2 and 7, the hair dryer 100 further includes a second filtering sleeve 60, the second filtering sleeve 60 is provided with a plurality of second filtering holes 61, the second filtering sleeve 60 is connected to one end of the handle 12 away from the main body 11, an inner surface of the second filtering sleeve 60 abuts against an outer surface of the first filtering sleeve 50, the second filtering holes 61 and the first filtering holes 51 are oppositely disposed, and an aperture of the first filtering holes 51 is smaller than an aperture of the second filtering holes 61. Particularly, thereby form the multilayer filtration through setting up the cooperation of second filter sleeve 60 and first filter sleeve 50, further improve the effect of filtering the fluid, mode such as second filter sleeve 60 accessible screw or buckle is connected in handle 12, when second filter sleeve 60 is connected in handle 12, because the internal surface of second filter sleeve 60 and the external surface butt of first filter sleeve 50, consequently can be simultaneously spacing fixed first filter sleeve 50 through fixed second filter sleeve 60, realize that first filter sleeve 50 and second filter sleeve 60 are fixed simultaneously, guarantee hair-dryer 100 overall structure's stability with this.

The present invention further provides a hair dryer 100, referring to fig. 1 to 5, the hair dryer 100 includes a housing 10, a power line 20, a conductive metal sheet 30 and a blower (not shown), the housing 10 includes a main body 11 and a handle 12, a main control board (not shown) is disposed in the main body 11; the power cord 20 is connected to the handle 12 and extends out of the handle 12; the conductive metal sheet 30 is fixed on the inner wall of the handle 12, and the conductive metal sheet 30 is used for electrically connecting the main control board and the power line 20; the fan is arranged in the handle 12 and is electrically connected with the main control board, and the central axis of the fan coincides with the central axis of the handle 12 in the extending direction of the handle 12.

Specifically, in the extending direction of the handle 12, namely, the extending direction of the length of the handle 12 can be taken as the extending direction of the handle 12, and the conductive metal sheet 30 is arranged to replace a plurality of cables to realize electrical conduction, so that the wiring space in the handle 12 is saved, the size of the hair dryer 100 can be correspondingly reduced, the use hand feeling of a user holding the handle 12 of the hair dryer 100 is improved, and meanwhile, the size of the handle 12 can be further reduced by coinciding the central axis of the fan with the central axis of the handle 12, and in the process of using the hair dryer, when the rotating speed of the fan exceeds 50,000rpm, if the fan is not concentric with the handle 12, a centrifugal force can be generated. Therefore, when the user uses the hair dryer, the user needs to apply a greater force to overcome the centrifugal force of the motor. The central axis of the blower coincides with the central axis of the handle 1212, so that the centrifugal force generated by the high speed of the blower can be reduced to reduce the force required by the user's hand to hold the blower, further optimizing the hand feel of the user when holding the handle 12.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A hair dryer, comprising:

the shell is provided with a main control board;

the power line is connected to the shell and extends out of the shell; and

the conductive metal sheet is fixed on the inner wall of the shell and used for enabling the main control board to be electrically conducted with the power line.

2. A hair dryer according to claim 1, wherein said power cord has a live terminal and a neutral terminal, and the number of said conductive metal pieces is two, and two of said conductive metal pieces are connected to said live terminal and said neutral terminal, respectively, and are symmetrically disposed on an inner wall surface of said housing.

3. A hairdryer as claimed in claim 1, wherein said conductive metal sheet is of unitary construction with said inner housing wall;

and/or the conductive metal sheet is a copper sheet.

4. The hair dryer of claim 1, wherein an oxidation preventing layer is formed on a portion of the conductive metal sheet exposed outside the inner wall surface of the housing.

5. A hair dryer as claimed in any one of claims 1 to 4, wherein the housing comprises a main body and a handle, the main body is connected to the handle, the conductive metal sheet is provided on an inner wall surface of the handle, the main control board is provided in the main body, and the power cord is connected to an end of the handle facing away from the main body.

6. A hairdryer as claimed in claim 5, further comprising an operating switch slidably mounted on said handle and located between said body and said conductive metal plate, said operating switch being slidable to bring said body into and out of communication with said conductive metal plate.

7. A hair dryer as claimed in claim 5, further comprising a blower, wherein said handle defines an air inlet, said main body defines an air outlet, said blower is disposed within said handle and electrically connected to said main control panel, said blower is adapted to draw in ambient fluid from said air inlet.

8. The hair dryer of claim 7, further comprising a first filter sleeve, wherein the first filter sleeve is fixed to the handle in a sleeved manner and covers the air inlet, and a plurality of first filter holes are formed in the first filter sleeve and used for filtering outside fluid.

9. The hair dryer of claim 8, wherein a plurality of abutting projections are convexly provided at an end of the handle facing away from the main body, and when the first filter sleeve is sleeved on the handle, the plurality of abutting projections are used for limiting and abutting against the first filter sleeve;

and/or, the hair dryer still includes the second and filters the sleeve, the second filters the sleeve and has seted up a plurality of second and filters the hole, the second filter the sleeve connect in the handle deviates from the one end of main part, just the internal surface of second filter the sleeve with the surface butt of first filter sleeve, and make the second filter the hole with first filter the hole and set up relatively, the aperture of first filter the hole is less than the aperture of second filter the hole.

10. A hair dryer, comprising:

the device comprises a shell, a handle and a main control board, wherein the shell comprises a host and the handle;

the power cord is connected to the handle and extends out of the handle;

the conductive metal sheet is fixed on the inner wall of the handle and used for electrically communicating the main control board and the power line; and

the fan is arranged in the handle and electrically connected with the main control board, and the central axis of the fan coincides with the central axis of the handle in the extending direction of the handle.

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