CN219962163U - Air duct structure of rotatable electric hair drier - Google Patents

Abstract

The utility model discloses an air duct structure of a rotatable electric hair drier, which comprises: the device comprises a main body and a handle, wherein a main body air channel is formed in the main body, and a handle air channel is formed in the handle; one end of the main body and one end of the handle are connected through a rotary table, a rotary fastening column is formed in the rotary table, and the main body and the handle rotate by taking the rotary fastening column as an axis so as to change the air outlet angle; the rotary table is internally provided with a transition air duct, the main body air duct is communicated with the transition air duct through a main body air inlet, and the handle air duct is communicated with the transition air duct through a handle air outlet; the inside of the transition air duct is divided by a rotary fastening column to form a left-turning transition air duct and a right-turning transition air duct, and air flow is divided in the transition air duct by the rotary fastening column to form left-turning air flow flowing along the left-turning transition air duct and right-turning air flow flowing along the right-turning transition air duct; in the above-mentioned technique, through with main part and handle relative rotation, can change the air-out angle, be applicable to different service scenarios, facilitate the use or accomodate.

Description

Air duct structure of rotatable electric hair drier

Technical Field

The utility model relates to the technical field of electric hair dryers, in particular to an air duct structure of a rotatable electric hair dryer.

Background

The hair dryer is a daily hairdressing product, is one of the indispensable tools in hairdressing, and can conveniently and rapidly finish hairdressing and drying hair, but the traditional hair dryer has a 7-shaped structure, so that the occupied area is large, the storage is very inconvenient, and the storage affects the attractiveness of a living room. On the other hand, the fixed handle cannot meet various use requirements, for example, when the hair is blown to the pet, the wrist pain is easy to be caused by long-time holding due to the position of the handle and the characteristics of the pet.

There are foldable blowers in the prior art, such as chinese patent No.: 201920735291.7A blower with a rotatable and foldable handle comprises a blower body and a handle, wherein a fixed ring and a movable ring are arranged between the blower body and the handle, the movable ring is arranged on the handle and is rotatably arranged on the fixed ring, one end of the fixed ring is fixed on the blower body, and the other end of the fixed ring is fixed on the handle; when the handle is rotated and folded, the fixed ring is fixed, and the movable ring rotates along with the rotation of the handle; the fixed ring and the movable ring interact to realize the rotation and the stop of the handle. The handle is folded through rotating the rotating ring on the fixed rotating ring, so that the occupied space of the blower can be reduced after the handle is folded, and the blower is convenient to store and carry. In the prior art, the handle can be folded with the blower body to be conveniently stored, but can not be used continuously after being folded, namely the aim of adjusting the use angle can not be realized.

Disclosure of Invention

In view of the above, the present utility model provides an air duct structure of a rotatable electric hair dryer.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: air duct structure of rotatable hairdryer, the hairdryer includes: the device comprises a main body and a handle, wherein a main body air channel is formed in the main body, and a handle air channel is formed in the handle;

one end of the main body and one end of the handle are connected through a rotary table, a rotary fastening column is formed in the rotary table, and the main body and the handle rotate by taking the rotary fastening column as an axis so as to change the air outlet angle;

the rotary table is internally provided with a transition air duct, the main body air duct is communicated with the transition air duct through a main body air inlet, and the handle air duct is communicated with the transition air duct through a handle air outlet;

the inside of the transition air duct is divided by a rotary fastening column to form a left-turning transition air duct and a right-turning transition air duct, and air flow is divided in the transition air duct by the rotary fastening column to form left-turning air flow flowing along the left-turning transition air duct and right-turning air flow flowing along the right-turning transition air duct; in the technology, the main body and the handle are rotated relatively, so that the air outlet angle can be changed, the air outlet device is suitable for different use scenes, and is convenient to use or store; when the main body and the handle are rotationally adjusted to be approximately 7-shaped, the user can conveniently use the air blower; when the main body and the handle are rotationally adjusted to be in a shape of '1', the air can be conveniently stored, and meanwhile, the air can be blown when in the shape of '1'.

As a preferable scheme of the utility model, the total ventilation area in the transition air duct is Q, the ventilation area of the left transition air duct is Q1, and the ventilation area of the right transition air duct is Q2, q=q1+q2; the total ventilation area Q is a constant value, and the ventilation area Q1 of the left transition air duct is inversely related to the ventilation area Q2 of the right transition air duct; after the main body rotates to change the air outlet direction, the ventilation areas of the main body air duct and the handle air duct are unchanged, the ventilation area q1 of the left-turning transition air duct and the ventilation area q2 of the right-turning transition air duct are correspondingly changed, but the total ventilation area of the transition air duct is unchanged, namely the air outlet quantity is not influenced after the air outlet angle is adjusted.

As a preferable scheme of the utility model, a first connection state and a second connection state are arranged between the main body and the handle, and the main body air channel, the transition air channel and the handle channel are communicated in the first connection state and the second connection state;

in the first connection state, the main body and the handle are distributed in a straight line, and the main body air channel and the handle air channel extend along the same axis;

in the second connection state, the main body rotates relative to the handle, and an included angle alpha is formed between the main body air duct and the handle air duct;

when adjusting to the first state, whole hairdryer is "1" style of calligraphy, can be "1" style of calligraphy air-out or accomodate, and is the same reason, when the second connected state, is certain contained angle alpha between handle and the main part, can rotate to "7" style of calligraphy air-out or accomodate, and regulation mode is simple, swift, satisfies user's different user demands.

As a preferred aspect of the present utility model, the main body includes: the outer wall of the main body rotating table is cylindrical, and a fastening column A is formed at the center of the main body rotating table; the first surface of the main body rotating table is of a counter-sunk table type structure, and an open flush opening is formed on the first surface;

the handle includes: the handle shell and the handle rotating table are characterized in that the outer wall of the handle rotating table is cylindrical, and a fastening column B is formed at the center of the handle rotating table; the second surface of the handle rotating table is of a counter-sunk table type structure, and an open flush opening is formed on the second surface;

the main body rotating table and the handle rotating table are assembled in a superposition way, the first surface of the main body rotating table is correspondingly combined with the second surface of the handle rotating table, and the fastening column A and the fastening column B are correspondingly inserted and locked; here, limited the concrete structure of main part and handle, through main part revolving stage and handle revolving stage, constitute the mode of revolving stage jointly, compact structure to revolving stage, main part revolving stage and handle revolving stage all are the column, rotate the back, and the ventilation area in transition wind channel is unchangeable, can keep normal air-out.

As a preferable scheme of the utility model, the transition air duct consists of a handle air outlet, a handle rotating table inner surface, a fastening column B outer surface, a main body rotating table inner surface, a fastening column A outer surface and a main body air inlet, and the total ventilation area of the transition air duct is unchanged after the main body and the handle relatively rotate; the air flow flowing into the transition air duct from the air outlet of the handle is forced to be divided into two paths of air flows because of touching the rotary fastening column, and the two paths of air flows are converged again into one air flow at the air inlet of the main body and blown out from the air duct of the main body for use.

As a preferable scheme of the utility model, the inner bottom surface of the main body rotating table is provided with an arc surface, and the main body rotating table is provided with an arc surface from the main body air inlet end to the opposite other end, and the main body air inlet end is a low-level end, so that air flow is conveniently guided.

As a preferable scheme of the utility model, a heating component, a heat insulating piece and an air outlet nozzle are assembled in the main body shell, the air outlet nozzle is positioned at an air outlet of the main body, and the heating component is positioned in the air duct of the main body; the ventilation cross-sectional area of the main body air duct is larger than that of the main body air inlet;

a motor assembly is arranged in the handle shell, and a handle sleeve and a tail cover assembly are arranged outside the handle shell; the ventilation cross-sectional area of the handle air duct is larger than that of the handle air outlet; when the air conditioner is used, air flows enter the handle air duct from the tail cover assembly, enter the transition air duct through the handle air outlet, are divided into left-turning air flow and right-turning air flow in the transition air duct, are collected in the main body air duct, are heated by the heating assembly, and finally blow hot air out from the main body air outlet.

In a preferred embodiment of the present utility model, the second surface of the main body turntable is provided with a connection fixing member, and the fastening column a and the fastening column B are limited by the connection fixing member, so that the connection is enhanced, and the turntable is prevented from being separated.

As a preferable scheme of the utility model, the control panel is assembled in the handle rotating table, the first surface of the handle rotating table is provided with a key electrically connected with the control panel, and the operation of the electric hair drier is controlled through the key.

As a preferable scheme of the utility model, a handle air outlet is formed between the handle shell and the handle rotating table, a main body air inlet is formed between the main body shell and the main body rotating table, and the handle air outlet and the main body air inlet are distributed at different heights; the main body air inlet and the handle air outlet are divided by an interface formed by the first surface of the main body rotating table and the second surface of the handle rotating table, and the main body air inlet and the handle air outlet are distributed up and down and are not overlapped.

The other beneficial technical effects of the utility model are embodied in the specific embodiments.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an electric hair dryer in a first connection state;

fig. 2 is a schematic view of the hair dryer of the present utility model in a 45 ° connected state;

fig. 3 is a schematic view of the hair dryer of the present utility model in a 90 ° connected state;

fig. 4 is an exploded view of the hair dryer of the present utility model;

FIG. 5 is a schematic view of a body of the present utility model;

FIG. 6 is a schematic cross-sectional view of a body of the present utility model;

FIG. 7 is a schematic view of a handle of the present utility model;

FIG. 8 is a schematic cross-sectional view of a handle of the present utility model;

FIG. 9 is a schematic view of the front angle of the hair dryer of the present utility model;

fig. 10 is a schematic cross-sectional view of the hair dryer of the present utility model in a first connection state;

fig. 11 is a schematic partial cross-sectional view of the hair dryer of the present utility model in a first connection state;

fig. 12 is a schematic partial cross-sectional view of the hair dryer of the present utility model in a 45 ° connected state;

fig. 13 is a schematic cross-sectional view of the hair dryer of the present utility model in a 90 ° connected state;

fig. 14 is a schematic partial cross-sectional view of the hair dryer of the present utility model in a 90 ° connected state.

Description of the reference numerals

Body 100	Main body air duct 101	Main body air intake 102	Main body air outlet 103
				Body housing 110	Main body rotary table 120	First surface 121	Fastening post A130
Heating element 140	Thermal insulation 150	Air outlet nozzle 160	Connecting fixture 170
				Screw 171	Closing plate 172
Handle 200	Handle air duct 201	Handle air outlet 202	Handle air inlet 203
				Handle shell 210	Handle rotary table 220	Second surface 221	Fastening post B230
Handle sleeve 240	Tail cap assembly 250	Control panel 260	Key 270
				Motor assembly 280
Rotating table 300	Transition duct 301	Left turn transition duct 3011	Right turn transition duct 3012
				Rotating fastening post 310

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

Referring to fig. 1 to 10, referring to an air duct structure of a rotatable electric hair dryer, the electric hair dryer includes: a main body 100 and a handle 200, wherein the main body 100 is internally provided with a main body air duct 101, and the handle 200 is internally provided with a handle air duct 201.

One end of the main body 100 and one end of the handle 200 are connected through a rotary table 300, a rotary fastening column 310 is formed in the rotary table 300, and the main body 100 and the handle 200 rotate by taking the rotary fastening column 310 as an axis so as to change the air outlet angle;

a transition air duct 301 is constructed in the rotary table 300, the main body air duct 101 is communicated with the transition air duct 301 through the main body air inlet 102, and the handle air duct 201 is communicated with the transition air duct 301 through the handle air outlet 202;

the inside of the transition duct 301 is divided by the rotation fastening column 310 to form a left-turn transition duct 3011 and a right-turn transition duct 3012, and the air flow is divided by the rotation fastening column 310 in the transition duct 201 to form a left-turn air flow and a right-turn air flow.

The rotary table 300 is columnar, the main body 100 and the handle 200 extend along the radial direction of the rotary table 300, the main body 100 forms the main body air inlet 102 and the main body air outlet 103, and the handle 200 forms the handle air outlet 202 and the handle air inlet 203. The main body 100 and the handle 200 can be rotated by the rotary table 300 to realize angle adjustment, thereby adjusting the air outlet angle.

In one embodiment, the total ventilation area in the transition duct 301 is Q, the ventilation area of the left transition duct 3011 is Q1, and the ventilation area of the right transition duct 3012 is Q2, q=q1+q2; the total ventilation area Q is a constant value, and the ventilation area Q1 of the left transition duct 3011 is inversely related to the ventilation area Q2 of the right transition duct 3012;

when the main body 100 and the handle 200 relatively rotate, the ventilation area Q1 of the left-turn transition air duct 3011 and the ventilation area Q2 of the right-turn transition air duct 3012 are correspondingly changed, as shown in fig. 2 and 12, when the main body 100 rotates 45 ° relative to the handle 200, the length of the right-turn transition air duct 3012 is increased, the ventilation area Q2 of the right-turn transition air duct 3012 is correspondingly increased, the length of the left-turn transition air duct 3011 is reduced, the ventilation area Q1 of the left-turn transition air duct 3011 is correspondingly reduced, but the total ventilation area Q is unchanged, and the overall air output is not affected after the air output angle is adjusted.

Referring to fig. 1-3, the main body 100 and the handle 200 have a first connection state and a second connection state, and the main body air duct 101, the transition air duct 301 and the handle channel 201 are all connected in the first connection state and the second connection state;

in the first connection state, the main body 100 and the handle 200 are linearly distributed, the main body air duct 101 and the handle air duct 201 extend along the same axis, and as shown in fig. 1, the whole hair dryer is approximately in a1 shape;

in the second connection state, the main body 100 rotates relative to the handle 200, and an included angle alpha is formed between the main body air duct 101 and the handle air duct 201;

as shown in fig. 2, defining handle 200 is stationary, and body 100 is rotated 45 ° counterclockwise from the orientation of fig. 1, resulting in the angle shown in fig. 2, at which point the user may grasp handle 200, generally 45 ° down for air outlet;

as shown in fig. 3, defining handle 200 is stationary, body 100 is rotated 90 ° counterclockwise from the orientation of fig. 1, resulting in the angle shown in fig. 3, at which point the user may grasp handle 200, generally 90 ° down for air outlet;

two examples of wind-out angles are given here, and in actual use, from the orientation of fig. 1, the main body 100 rotates relative to the handle 200, either clockwise or counterclockwise, and can be positioned at any angle within a maximum rotation range.

Alternatively, the positioning may be performed by friction between the handle rotation stage 220 and the body rotation stage 120, and friction between the fastening posts a130 and B230.

In one embodiment, the body 100 includes: the main body shell 110 and the main body rotary table 120, wherein the outer wall of the main body rotary table 120 is cylindrical, and a fastening column A130 is formed at the center of the main body rotary table 120; the first surface 121 of the main body rotating table 120 is a counter-table structure, and the first surface 121 forms an open flush opening;

the handle 200 includes: the handle shell 210 and the handle rotating table 220, the outer wall of the handle rotating table 220 is cylindrical, and a fastening column B230 is formed at the center of the handle rotating table 220; the second surface 221 of the handle rotation stage 220 is a counter-table structure, and the second surface 221 forms an open flush opening;

the main body rotating table 120 and the handle rotating table 220 are assembled in a superposition mode, the first surface 121 of the main body rotating table 120 is correspondingly combined with the second surface 221 of the handle rotating table 220, and the fastening column A130 and the fastening column B230 are correspondingly inserted and locked.

In particular, as shown in fig. 5 to 10, the main body casing 110 has a cylindrical shape, the main body rotary table 120 is coupled to one end of the main body casing 110, and the first surface 121 is located approximately at one half of the main body casing 110;

the handle housing 210 is cylindrical, the handle rotation stage 220 is connected to one end of the handle housing 210, and the second surface 221 is located approximately at one half of the handle housing 210;

a flange is formed at the edge of the first surface 121 of the body rotation stage 120, a groove is formed at the second surface 221 of the handle rotation stage 220, and the flange is engaged with the groove to tightly connect the first surface 121 and the second surface 221, thereby forming a transition duct 301 inside the rotation stage 300.

The main body rotating table 120, the handle rotating table 220, the fastening column a130 and the fastening column B230 are all coaxially distributed, as shown in fig. 11, in the first state, the main body air inlet 102 and the handle air outlet 202 are linearly distributed on the extending axes of the main body 100 and the handle 200 in the top view, and as shown in fig. 10, in the first state, the main body air inlet 102 and the handle air outlet 202 are vertically staggered in the axial direction of the rotating table 300 in the front view.

In one embodiment, as shown in fig. 10, the transition duct 301 is composed of the handle outlet 202, the inner surface of the handle rotary table 220, the outer surface of the fastening post B230, the inner surface of the main body rotary table 120, the outer surface of the fastening post a130, and the main body air inlet 102. As shown in fig. 5, the inner bottom surface of the main body rotary table 120 is provided with an arc surface, and is arranged from the main body air inlet end to the opposite other end in an arc shape, and the main body air inlet end is a low-level end, and accordingly, in the first connection state, the handle air outlet 202 of the handle 200 is located at a high-level end.

When mounted, the first surface 121 of the main body rotary table 120 is overlapped with the second surface 221 of the handle rotary table 220, and in fig. 10, the handle air outlet 202 is at a low position and the main body air inlet 102 is at a high position.

In one embodiment, the main body housing 110 is assembled with a heating component 140, a heat insulating member 150 and an air outlet 160, the air outlet 160 is located at the main body air outlet 103, and the heating component 140 is located in the main body air duct 101; the ventilation cross-sectional area of the main air duct 101 is larger than that of the main air inlet 102;

a motor assembly 280 is arranged in the handle shell 210, and a handle sleeve 240 and a tail cover assembly 250 are arranged outside the handle shell 210; the ventilation cross-sectional area of the handle air duct 201 is larger than that of the handle air outlet 202;

in this embodiment, the ventilation cross-sectional area of the main air intake 102 is about one half of the ventilation cross-sectional area of the main air duct 101, the ventilation cross-sectional area of the handle air outlet 202 is about one half of the ventilation cross-sectional area of the handle air duct 201, and the ventilation cross-sectional area of the main air duct 101 and the ventilation cross-sectional area of the handle air outlet 202 are equal.

The heat insulating member 150 is disposed in the main body housing 110, the heat insulating member 150 is generally a housing structure, and may be sleeved in the main body housing 110 and have a gap with the inner wall of the main body housing 110, and the heating assembly 140 may be installed in the heat insulating member 150, so that excessive heat transfer to the main body housing 110 or the rotary table 300 can be prevented by the heat insulating member 150, and the air flow can be heated better.

The air outlet 160 may be provided in various shapes and may be replaced;

the handle sleeve 240 is sleeved outside the handle shell 210, the motor assembly 280 is installed in the handle shell 210, and the motor assembly 280 can push airflow to move; the tail cover assembly 250 is arranged at the tail end of the handle 200, and handle air inlets 203 are uniformly distributed on the periphery of the tail cover assembly 250 at 360 degrees; the tail cap assembly 250 is also connected to a power cord.

In one embodiment, the second surface of the main body rotating table 120 is provided with a connecting fixing member 170, and the fastening post a130 and the fastening post B230 are limited by the connecting fixing member 170;

the fastening post a130 protrudes from the first surface 121 in the main body rotary table 120, an insertion hole is formed in the fastening post a130, when the main body rotary table 120 and the handle rotary table 220 are assembled, the fastening post a130 extends into the handle rotary table 220, and the fastening post B230 is inserted into the fastening post a130 to form a rotary fastening post 310.

The connection fixture 170 includes: after the fastening column A130 and the fastening column B230 are spliced, the screw 171 is screwed into the fastening column A130 and the fastening column B230 on the second surface of the main body rotary table 120, the fastening column A130 and the fastening column B230 are locked, and the air leakage is prevented by sealing through the sealing glue; the closing plate 172 is mounted at the second surface of the body rotation table 120.

In one embodiment, the control board 260 is assembled in the handle rotating table 220, the key 270 electrically connected to the control board is disposed on the first surface of the handle rotating table 220, the operation of the electric hair dryer can be controlled through the key 270, and the vent hole is disposed on the first surface of the handle rotating table 220, and the vent hole can play a role of heat dissipation.

In one embodiment, the handle air outlet 202 is formed between the handle shell 210 and the handle rotating table 220, the body air inlet 102 is formed between the body shell 110 and the body rotating table 120, the handle air outlet 202 and the body air inlet 102 are distributed at different heights, the body air inlet 102 and the handle air outlet 202 are divided by an interface formed by the first surface 121 of the body rotating table 120 and the second surface 221 of the handle rotating table 220, and the body air inlet 102 and the handle air outlet 202 are distributed up and down and have no overlapping.

Further, as shown in fig. 1 and 10, in the first connection state, the handle 200 and the main body 100 rotate to be on the same axis, at this time, the handle air duct 201 and the main body air duct 101 are also distributed on the same axis, the flowing direction of the air flow is shown by the arrow, the air flow enters the handle air duct 201 from the handle air inlet 203, then enters the transition air duct 301 from the handle air outlet 202, as shown in fig. 11, the air flow is split by the rotation fastening column 310, the left-turn air flow flows along the left-turn transition air duct 3011, the right-turn air flow flows along the right-turn transition air duct 3012, finally, the air flow is collected in the main body air inlet 102 and enters the main body air duct 101, and the air flow is heated in the main body air duct 101 and then is finally sent out from the main body air outlet 103; in this state, the ventilation areas q1, q2 of the left-turn transition duct 3011 and the right-turn transition duct 3012 are equal.

The main body 100 rotates anticlockwise by about 45 degrees in the first connection state, and the main body 100 rotates in the second connection state, as shown in fig. 2 and 12, the position of the main body air inlet 102 in the transition air duct 301 correspondingly changes along with the rotation of the main body 100, so that the ventilation area q1 of the left transition air duct 3011 correspondingly decreases, the ventilation area q2 of the right transition air duct 3012 correspondingly increases, and finally the main body air inlet 102 still collects in the main body air duct 101, and the included angle alpha between the main body air duct 101 and the handle air duct 201 is 135 degrees;

similarly, the main body 100 is rotated counterclockwise by about 90 ° in the first connection state, and is in the 90 ° connection state in the second connection state, as shown in fig. 13 and 14, as the main body 100 rotates, the position of the main body air inlet 102 in the transition air duct 301 correspondingly changes, so that the ventilation area q1 of the left transition air duct 3011 correspondingly decreases, the ventilation area q2 of the right transition air duct 3012 correspondingly increases, and finally, the main body air inlet 102 still collects in the main body air duct 101, and the included angle α between the main body air duct 101 and the handle air duct 201 is 90 °.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. Air duct structure of rotatable hairdryer, the hairdryer includes: main part and handle, its characterized in that:

a main body air duct is formed in the main body, and a handle air duct is formed in the handle;

one end of the main body and one end of the handle are connected through a rotary table, a rotary fastening column is formed in the rotary table, and the main body and the handle rotate by taking the rotary fastening column as an axis so as to change the air outlet angle;

the rotary table is internally provided with a transition air duct, the main body air duct is communicated with the transition air duct through a main body air inlet, and the handle air duct is communicated with the transition air duct through a handle air outlet;

the transition air duct is internally divided by the rotary fastening column to form a left-turning transition air duct and a right-turning transition air duct, and air flow is divided in the transition air duct by the rotary fastening column to form left-turning air flow flowing along the left-turning transition air duct and right-turning air flow flowing along the right-turning transition air duct.

2. The air duct structure of a rotatable hair dryer according to claim 1, wherein: the total ventilation area in the transition air duct is Q, the ventilation area of the left transition air duct is Q1, the ventilation area of the right transition air duct is Q2, and Q=q1+q2; the total ventilation area Q is a constant value, and the ventilation area Q1 of the left transition duct is inversely related to the ventilation area Q2 of the right transition duct.

3. The air duct structure of a rotatable hair dryer according to claim 1, wherein: the main body and the handle are provided with a first connection state and a second connection state, and the main body air channel, the transition air channel and the handle channel are communicated in the first connection state and the second connection state;

in the first connection state, the main body and the handle are distributed in a straight line, and the main body air channel and the handle air channel extend along the same axis;

in the second connection state, the main body rotates relative to the handle, and an included angle alpha is formed between the main body air duct and the handle air duct.

4. The air duct structure of a rotatable hair dryer according to claim 1, wherein: the main body includes: the outer wall of the main body rotating table is cylindrical, and a fastening column A is formed at the center of the main body rotating table; the first surface of the main body rotating table is of a counter-sunk table type structure, and an open flush opening is formed on the first surface;

the handle includes: the handle shell and the handle rotating table are characterized in that the outer wall of the handle rotating table is cylindrical, and a fastening column B is formed at the center of the handle rotating table; the second surface of the handle rotating table is of a counter-sunk table type structure, and an open flush opening is formed on the second surface;

the main body rotating table and the handle rotating table are assembled in a superposition mode, the first surface of the main body rotating table is correspondingly combined with the second surface of the handle rotating table, and the fastening column A and the fastening column B are correspondingly inserted and locked.

5. The air duct structure of a rotatable hair dryer according to claim 4, wherein: the transition air duct consists of a handle air outlet, a handle rotating table inner surface, a fastening column B outer surface, a main body rotating table inner surface, a fastening column A outer surface and a main body air inlet.

6. The air duct structure of a rotatable hair dryer according to claim 4, wherein: the inner bottom surface of the main body rotating table is provided with an arc-shaped surface, and is arranged from the main body air inlet end to the opposite other end in an arc shape, and the main body air inlet end is a low-level end.

7. The air duct structure of a rotatable hair dryer according to claim 5, wherein: the main body shell is internally provided with a heating component, a heat insulating piece and an air outlet nozzle, the air outlet nozzle is positioned at the air outlet of the main body, and the heating component is positioned in the air duct of the main body; the ventilation cross-sectional area of the main body air duct is larger than that of the main body air inlet;

a motor assembly is arranged in the handle shell, and a handle sleeve and a tail cover assembly are arranged outside the handle shell; the ventilation cross-sectional area of the handle air duct is larger than that of the handle air outlet.

8. The air duct structure of a rotatable hair dryer according to claim 4, wherein: and the second surface of the main body rotating table is provided with a connecting fixing piece, and the fastening column A and the fastening column B are limited through the connecting fixing piece.

9. The air duct structure of a rotatable hair dryer of claim 8, wherein: the control panel is assembled in the handle rotating table, and the first surface of the handle rotating table is provided with keys electrically connected with the control panel.

10. The air duct structure of a rotatable hair dryer of claim 6, wherein: a handle air outlet is formed between the handle shell and the handle rotating table, a main body air inlet is formed between the main body shell and the main body rotating table, and the handle air outlet and the main body air inlet are distributed at different heights; the main body air inlet and the handle air outlet are divided by an interface formed by the first surface of the main body rotating table and the second surface of the handle rotating table, and the main body air inlet and the handle air outlet are distributed up and down and are not overlapped.