CN209732888U - Reliable operation's hairdryer - Google Patents

Abstract

The utility model relates to the field of household appliances, in particular to a reliable electric hair drier, which comprises a shell and a handle component connected with the shell, wherein the front end of the shell is provided with a first air outlet, the handle component is provided with a first air inlet, the electric hair drier also comprises a main air duct extending from the first air inlet to the first air outlet, a fan unit arranged in the main air duct and used for sucking air flow from the first air inlet into the electric hair drier and a heating unit used for heating the air flow, the fan unit comprises fan blades and a motor used for driving the fan blades to rotate, wherein the rear end of the shell is provided with a second air inlet, the front end of the shell is provided with a second air outlet, the electric hair drier also comprises an electric control element and an auxiliary air duct extending from the second air inlet to the second air outlet and radiating the electric control element, and the auxiliary air duct is independent of the main air duct. The heat dissipation efficiency of the electric control element is improved, and the working reliability is improved.

Description

Reliable operation's hairdryer

Technical Field

the utility model relates to a domestic appliance field especially relates to a reliable operation's hairdryer.

Background

The existing hair dryer is provided with an electric control element for controlling the work of the hair dryer, and particularly the hair dryer with a complex control program needs more electric control elements to form a control circuit. The electric control elements generate heat in the working process, if the electric control elements are not radiated in time, the performance of the electric control elements is poor, and the electric control elements with larger power can be burnt out.

In a related technology, a PCB for controlling the operation of the hair dryer is provided in the hair dryer, in order to dissipate heat for the PCB, the PCB is disposed at the rear end of the housing and is located in the main air duct, the heat is dissipated for the electric control element on the electric control board by the air flow generated by the fan unit, the air flow in the main air duct flows through the electric control board and the heating unit, the flow space and the flow path are increased, the air pressure and the air volume of the main air duct are inevitably reduced, or the rotating speed and the power of the motor are inevitably increased in order to ensure the air pressure and the air volume of the whole hair dryer, the service life of the motor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides an improve automatically controlled board radiating effect and obtain the hairdryer of great amount of wind and wind pressure.

The technical scheme of the utility model as follows:

The utility model provides a reliable operation's hairdryer, includes shell and the handle components who is connected with the shell, the front end of shell is equipped with first air outlet, be equipped with first air intake on the handle components, the hairdryer still includes the main wind channel that extends to first air outlet from first air intake, sets up the fan unit that is used for the suction air current to get into the hairdryer from first air intake and the heating unit that is used for heating this air current in the main wind channel, the fan unit includes the flabellum and is used for driving the rotatory motor of flabellum, its characterized in that, the rear end of shell is equipped with the second air intake, and the front end is equipped with the second air outlet, the hairdryer still includes electric control element and extends to the second air outlet from the second air intake and gives electric control element radiating supplementary wind channel, just it is independent of main wind channel.

Preferably, the main air duct includes a first section extending along the axial direction of the housing, and a rear end of the first section is spaced from the second air inlet and is arranged in a sealing manner.

Preferably, the electric control element is arranged between the rear end of the first section and the second air inlet.

Preferably, the electrical control element is located upstream of the heating unit.

Preferably, an inner cylinder for limiting the first section is further arranged in the shell, the heating unit is arranged in the inner cylinder, and the rear end of the inner cylinder is sealed through a sealing element.

Preferably, the first section is located within the secondary air duct.

Preferably, the housing further includes a non-enclosed duct defining the first section, the non-enclosed duct having an open portion extending in an axial direction thereof, the duct including an inner wall and an outer wall, the heating unit being disposed between the inner wall and the outer wall, and a rear end of the non-enclosed duct being sealed by a sealing member.

Preferably, the heating unit comprises a heat insulation member with a hollow channel, and the electric hair dryer further comprises an electric control element arranged in the hollow channel.

Preferably, the sealing member includes a heat conducting member, one surface of the heat conducting member is attached to the electric control element, and the other surface of the heat conducting member is located in the main air duct.

Preferably, the motor is a brushless motor, and the electric control element constitutes a control circuit of the brushless motor.

The utility model has the advantages that:

1. The auxiliary air channel is independently arranged for the electric control element to dissipate heat, so that the heat dissipation efficiency is improved, other parts which do not need heat dissipation can be freely arranged according to the internal structural design of the electric hair drier, the internal space of the electric hair drier can be fully utilized, the structural parts in the electric hair drier can be more reasonably arranged, and the size of the electric hair drier tends to be miniaturized; the auxiliary air channel is independent of the main air channel, so that the hot air in the main air channel is isolated, the air flow entering the auxiliary air channel is ensured to be cold air flow, and the power control element is effectively radiated; and the air pressure of the air flow entering the main air duct can be ensured, the path of the air flow in the main air duct is short, the number of parts flowing through is small, the air volume loss is small, and high air pressure and air volume can be obtained, so that the hair can be dried quickly.

2. The rear end of the first section and the second air inlet are spaced and sealed, so that the advantage that air quantity and air pressure are not leaked is guaranteed, and a proper amount of air flow enters the auxiliary air channel under the action of the air flow of the main air channel to dissipate heat of the electric control element, and the air quantity and the air pressure of the electric hair drier are improved.

3. The electric control element is arranged between the rear end of the first section and the second air inlet, the mounting space inside the shell is fully utilized, the air flow entering the auxiliary air channel from the second air inlet is directly blown to the electric control element, the wind power and the air volume are large, and the heat dissipation efficiency is improved.

4. The electric control element is positioned at the upstream of the heating unit, so that the influence of the heat radiation of the heating unit on the temperature rise of the electric control element is reduced; and the cold airflow entering the shell is directly sucked from the outside when the airflow of the auxiliary air duct blows through the electric control element, so that the heat dissipation efficiency is improved.

5. The heat of the heating unit is isolated by the arrangement of the inner cylinder, and the influence of the heat radiation of the heating unit on the temperature rise of the electric control element is reduced.

6. The first section is located in the auxiliary air duct, so that the influence of the heat of the main air duct on the shell is isolated through the auxiliary air duct, partial heat is taken away through the auxiliary air duct in the long-time use process of the electric hair drier, the temperature rise of the shell cannot be large, and hands cannot be scalded after the electric hair drier is used up.

7. Through the setting of non-closed pipeline, simple structure, convenient assembling is convenient for sealed, prevents that the amount of wind of main wind channel, wind pressure from leaking.

8. By arranging the electric control element in the hollow channel, the electric hair drier has the advantages that on one hand, the internal space of the shell is fully utilized, and the electric hair drier is miniaturized; on the other hand, the heat of the heating element is isolated by the heat insulation piece, so that the influence of the heating element of the electric heating unit on the temperature rise of the electric control element is reduced, the performance interference of the temperature on the temperature rise of the electric control element is reduced, and the service life of the electric control element is prolonged.

9. The heat of the electric control element is guided into the main air duct through the heat conducting piece, and partial heat of the electric control element is taken away through the air flow of the main air duct, so that the heat dissipation effect is improved.

10. Brushless motor needs to realize the switching-over through electronic switch, brushless motor's control circuit comprises a plurality of electrical control element that power is great, easily produce higher heat in the short time, just under the more thermal condition of electrical control element itself production, if heating unit's heat produces the radiation to it in addition, can lead to electrical control element to burn out, and place in the heat insulating part through the electrical control element who will constitute motor control circuit, the heat radiation of heating unit is kept apart through the effect of heat insulating part, can reduce the risk that electrical control element is burnt out.

Drawings

Fig. 1 is a schematic view of the whole structure of the hair dryer according to the first embodiment of the present invention.

Fig. 2 is a cross-sectional view of the housing assembly according to the first embodiment of the present invention.

Fig. 3 is a sectional view of the electric hair dryer according to the first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the annular PCB according to the first embodiment of the present invention.

Fig. 5 is a schematic structural diagram of the electric control element and the heating unit according to the first embodiment of the present invention.

Fig. 6 is a schematic structural view of a heat insulation member according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of the PCB according to the first embodiment of the present invention.

Fig. 8 is a schematic view of an assembly structure of the electric control element and the heating unit according to the first embodiment of the present invention.

Fig. 9 is a schematic structural diagram of the first clamping groove according to the embodiment of the present invention.

Fig. 10 is a schematic structural diagram of the extension portion according to the first embodiment of the present invention.

Fig. 11 is a schematic structural view of an unclosed pipeline according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a heating unit according to a second embodiment of the present invention.

The names of the components marked in the figures are as follows:

1. A housing; 2. a handle assembly; 3. a first air inlet; 4. a first air outlet; 5. a fan unit; 6. a heating unit; 601. a thermal insulation member; 602. a hollow channel; 603. mica sheets; 604. a heater; 7. an electrical control element; 8. a notch; 9. an extension portion; 10. perforating; 11. a card slot; 12. a non-enclosed conduit; 1201. an inner wall; 1202. an outer wall; 1203. an opening part; 13. a fixed mount; 14. an inner barrel; 15. a heat insulating member; 16. a second air inlet; 17. a second air outlet; 18. a seal member; 19. a main air duct; 20. and an auxiliary air duct.

Detailed Description

The following describes the present invention in detail with reference to the accompanying drawings.

The first embodiment is as follows:

As shown in fig. 1 to 9, a reliable electric hair dryer comprises a housing 1 assembly having a housing 1, a handle assembly 2 connected to the housing 1, a first air outlet 4 arranged at the front end of the housing 1, a first air inlet 3 arranged on the handle assembly 2, a main air duct 19 extending from the first air inlet 3 to the first air outlet 4, a fan unit 5 arranged in the main air duct 19 for drawing an air flow from the first air inlet 3 into the electric hair dryer, and a heating unit 6 for heating the air flow, wherein the fan unit 5 comprises fan blades and a motor for driving the fan blades to rotate, wherein a second air inlet 16 is arranged at the rear end of the housing 1, a second air outlet 17 is arranged at the front end of the housing, an electric control element 7 and an auxiliary air duct 20 extending from the second air inlet 16 to the second air outlet 17 and dissipating heat from the electric control element 7 are further included, and the auxiliary air duct 20 is provided independently of the main air duct 19. On one hand, the airflow of the auxiliary air duct 20 independently dissipates heat for the electric control element 7, so that the heat dissipation efficiency is improved, and the influence of the hot airflow of the main air duct 19 on the temperature rise of the electric control element 7 can be reduced; on the other hand, the air flow in the main air duct 19 and the auxiliary air duct 20 is two air flows, so that the air volume and the air pressure of the air flow blown out by the hair dryer are improved, the hair is favorably scattered, the contact area of hot air and the hair is increased, and the hair is quickly dried. The electric control unit 7 has one or more.

The air flow of the main air duct 19 is a nonlinear air flow, and comprises a first section extending along the axial direction of the housing 1, and the rear end of the first section and the second air inlet 16 are spaced and arranged in a sealing manner; the main duct 19 also includes a vertical section located at 90 ° to the first section within the handle assembly 2. The air flow of the auxiliary air duct 20 extends along the axial direction of the housing 1 and is sucked by the air flow blown out from the first air outlet 4 and enters the auxiliary air duct 20 from the first air inlet 3, so that the pressure of the air flow blown out from the first air outlet 4 and the pressure of the air flow blown out from the second air outlet 17 are different, two air flows with different air pressures are mixed and blown to the hair, the pressure felt by the surface of the scalp is reduced, and the comfort level is improved.

Further, the first air outlet 4 and the second air outlet 17 are located on the same plane, in this case, the air flow in the main air duct 19 and the air flow in the auxiliary air duct 20 are respectively blown out of the electric hair dryer from the first air outlet 4 and the second air outlet 17 at the same time, and the two air flows are independently emitted from the housing 1. It can be understood that there is a distance difference between the second outlet 17 and the first outlet 4, and the air flow of the auxiliary duct 20 is blown out from the second outlet 17 and then mixed with the air flow of the main duct 19 at the distance difference, and then blown out from the first outlet 4, so as to mix the cold air and the hot air.

Further, the electric control element 7 is disposed between the rear end of the first section and the second air inlet 16, and the rear end of the first section. This example includes two cases, the heating unit 6 being provided in the handle assembly 2 and the heating unit 6 being provided in the first section. Preferably, the heating unit 6 is arranged in the first section, so that a greater heating power can be obtained under the influence of space, the weight of the handle assembly 2 and the housing 1 is balanced, and it can be ensured that the electric control element 7 is located upstream of the heating unit 6, and the temperature rise of the electric control element 7 by the heat radiation of the heating unit 6 is isolated by the sealing structure.

Further, an inner cylinder 14 defining a first section is further provided in the housing 1, the heating unit 6 is provided in the inner cylinder 14, and a rear end of the inner cylinder 14 is sealed by a sealing member 18. The first section is located within the secondary air duct 20, and the secondary air duct 20 includes an axial section extending around the first section, the axial section being defined by an inner sidewall of the outer casing 1 and an outer sidewall of the inner barrel 14. The axial segments form part or all of the secondary air ducts 20. The axial section forms a flow isolation space between the main air duct 19 and the shell 1, plays a role of heat insulation, takes away heat on the surface of the inner barrel 14, reduces the temperature rise of the shell 1 and enables the shell 1 not to be scalded.

As another example, as shown in fig. 2 to 4, the electric control unit 7 is located upstream of the heating unit 6, which is different from the above example in that the electric control unit 7 is not necessarily disposed between the rear end of the first section and the second air inlet 16, and this scheme is to blow the cold air flow which does not generate heat exchange with the heating unit 6 through the electric control unit 7 and take away heat of the electric control unit 7 in time.

As a further example, as shown in fig. 4, 5 to 10, the heating unit 6 comprises an insulating element 601 having a hollow channel 602, and the hair dryer further comprises an electric control element 7 arranged inside the hollow channel 602. The heating unit 6 further comprises a mica sheet 603 installed on the heat insulating part 601 and a heating wire 604 wound on the mica sheet 603, and by arranging the electric control element 7 in the hollow channel 602, the heat radiation of the heating wire 604 to the electric control element 7 can be isolated by utilizing the wall thickness of the heat insulating part 601, so that the influence of the heat radiation on the performance of the electric control element 7 is reduced. Further, the heat insulating member 601 is a notched cylinder having a notch 8 extending in an axial direction thereof. The gap 8 extends along the length of the gap cylinder at least 1/2 times its total length to form enough space for the air flow in the main duct 19 to move.

in one example, the electrical control element 7 extends into the recess 8. The electric control element 7 has a certain length, the electric control element 7 is generally cylindrical, and preferably, the axis of the electric control element 7 is perpendicular to the axis of the notch 8, so that the notch 8 can be utilized to reduce the installation space occupied by the electric control element 7, and the wind pressure of the main air duct 19 cannot be obviously influenced because the notch 8 is too wide.

As another example, the notch cylinder includes an extension portion 9 extending in the axial direction thereof, and the extension portion 9 covers the electric control member 7. In this example, the extension portion 9 is gradually close to the electric control element 7, in this case, the heating wire 604 can surround the notch cylinder for a whole circle, and the heat generated by the heating wire 604 above the electric control element 7 is isolated by the extension portion 9, so that the heating power of the hair dryer can be improved, the purpose of drying hair quickly can be achieved, and the influence of the heating wire 604 on the performance of the electric control element 7 can be reduced.

In another example, the hair dryer further comprises a fixing frame 13 for mounting the electric control element 7, the fixing frame 13 is arranged in the gap cylinder, and the electric control element 7 is arranged towards the gap 8; in this example, the fixing frame 13 is a circuit board on which the electronic control element 7 is soldered. Or, the electric hair drier also comprises a fixing frame 13 for mounting the electric control element 7, the fixing frame 13 is arranged in the gap cylinder, and the electric control element 7 is arranged towards the handle assembly 2; the influence of the heat of the heating unit 6 on the performance of the electric control element 7 is isolated by the fixing frame 13. Further, the fixing frame 13 is shaped like a plate, a clamping groove 11 for fixing the fixing frame 13 is formed in the side wall of the gap cylinder, and the edge of the fixing frame 13 is matched with the clamping groove 11. In this example, the two slots 11 extend in the axial direction of the notched cylinder and are arranged opposite to each other.

As another example, the electrical control element 7 is disposed on the heat insulating member 601, a groove for mounting the electrical control element 7 is disposed on the heat insulating member 601, and the electrical control element 7 is disposed on the groove of the heat insulating member 601, where the heat insulating member 601 forms the fixing frame 13 of the electrical control element 7.

In another example, the notched cylinder is provided with a perforation 9, and the air flow of the main air duct 19 enters the interior of the hollow channel 602 through the perforation 9. The fan unit 5 can be arranged in the handle assembly 2, the air inlet is arranged below the handle assembly 2, the main air duct 19 comprises a vertical section in the handle assembly 2 and an axial section in the housing 1, and in order to ensure that more air flows enter the interior of the hollow channel 602, the perforation 9 is arranged opposite to the handle assembly 2, namely the perforation 9 is arranged on the axis of the handle assembly 2, so that the air flows directly enter the interior of the hollow channel 602 from the perforation 9 from the axial section, and more air flows enter the interior of the hollow channel 602 and blow towards the electric control element 7, thereby quickly taking away heat generated by the electric control element 7; the air flow in the hollow channel 602 can be merged into the axial section of the main air duct 19 again through the gap 8 of the gap cylinder; it will be appreciated that the perforations 9 are provided at an angle to the axis of the handle assembly 2 and further that the air flow may be directed through the air flow directing structure into the hollow passage 602. The perforations 9 are provided upstream of the heating wire 604 so as to allow the flow of cold air not heated by the heating wire 604 to enter the hollow channel 602, thus serving to carry away the heat generated by the electronic control unit 7 itself. Furthermore, the front end of the notch cylinder is provided with an airflow outlet, and the airflow in the hollow channel 602 is blown out from the airflow outlet, so that the airflow carrying the heat generated by the electric control element 7 can be quickly blown out from the hollow channel 602, and the influence on the performance of the electric control element 7 caused by untimely discharge of the heated airflow in the hollow channel 602 is prevented.

The electric hair drier also comprises a fixing frame 13 for installing the electric control element 7 positioned in the auxiliary air duct 20, wherein the fixing frame 13 is annular. In this example, the fixing frame 13 is a circuit board, and the electronic control element 7 is soldered on the fixing frame 13. The annular fixing frame 13 is disposed at the rear end of the housing 1 and located between the rear end of the first section and the second air inlet 16. The inner diameter of the annular fixing frame 13 is larger than the outer edge of the second air inlet 16, so that wind shielding is prevented. The sealing element 18 provided at the rear end of the inner cylinder 14 has an extension on which the annular holder 13 is fitted in interference fit. Or, the rear end of the housing 1 is provided with a fixing piece for fixing the annular fixing frame 13, and the annular fixing frame 13 is connected with the fixing piece through a screw. The fixing frame is annular, and the electric control element is arranged on the mounting frame, so that the assembly efficiency is improved conveniently; on the other hand, the fixed frame 13 is prevented from blocking the wind, so that the airflow is rebounded by the fixed frame 13 to cause unsmooth airflow entering the auxiliary air duct 20 from the second air inlet 16, which results in reduction of the heat dissipation efficiency of the electronic control element 7.

The sealing member 18 comprises a heat conducting member, one side of which is attached to the electronic control element 7 and the other side of which is located in the main air duct. The heat conducting member may be metal such as aluminum, copper, etc. The sealing member 18 is made of a thermally conductive material or the sealing member 18 is a plastic insert with a thermally conductive material. When the sealing member 18 is a plastic member embedded with a metal heat conducting member such as aluminum, copper, etc., the plastic member 18 and the heat conducting member are disposed in a sealing manner in a matching gap, i.e., the main air duct 19 and the auxiliary air duct 20 are still two independent air ducts. The heat generated by the electric control element 7 in the working process makes the heat conducting piece become hot through the heat conducting piece, one surface of the heat conducting piece is positioned in the main air duct 19, the heat conducting piece is positioned at the upstream of the heating unit 6, when the air flow of the main air duct 19 flows, the air flow of the main air duct 19 which is not heated takes away the heat conducted by the heat conducting piece, and meanwhile, the air flow of the auxiliary air duct 20 can also dissipate the heat of the electric control element 7, so that the heat dissipation efficiency is improved.

The motor is a brushless motor, and the electric control element 7 forms a control circuit of the brushless motor. The electric control element 7 located between the second air inlet 16 and the rear end of the first section constitutes a program circuit of the brushless motor, and the electric control element 7 located in the heat insulating member 601 constitutes a power circuit of the brushless motor. The control circuit of the brushless motor is more complicated, and the power of the electric control element 7 of the power circuit and the program circuit is larger, so that more heat than the common electric control element 7 of the hair dryer can be generated in unit time, such as a temperature controller, a thermistor and the like, if the electric control element 7 of the control circuit of the brushless motor is not timely radiated, if the electric control element 7 is burnt out, the brushless motor can be stopped working, and then the fan blades stop rotating, no air flow passes through the heating unit 6, if the heating unit 6 continues working, the heating wire 604 can be red, even the hair dryer can be burnt out, and serious safety accidents such as fire disasters and the like can be caused. And through the utility model discloses a scheme can effectively keep apart the heat of heating element 6, and can give electrical control element 7 heat dissipation through cold wind, guarantees brushless motor's effective work, prevents the production of incident.

Example two:

the present embodiment is different from the first embodiment in that, as shown in fig. 11 and 12, a non-closed duct 12 defining a first section is further provided in the housing 1, the non-closed duct 12 has an opening portion 1203 extending along an axial direction thereof, the duct includes an inner wall 1201 and an outer wall 1202, the heating unit 6 is provided between the inner wall 1201 and the outer wall 1202, and a rear end of the non-closed duct 12 is sealed by a sealing member 18. In this case, the electronic control element 7 may be disposed between the rear end of the non-closed duct 12 and the second air inlet 16; or may be provided in both the space between the rear end of the non-enclosed duct 12 and the second air inlet 16, and the space between the inner wall 1201 and the housing 1.

The opening portion 1203 is provided corresponding to the notch 8, and the opening portion 1203 extends in the axial direction of the non-closed duct 12. The inner wall 1201 and the outer wall 1202 may be integrally provided or may be separately provided. The heating wire 604 is arranged towards the outer wall 1202, the notch barrel is arranged towards the inner wall 1201, heat generated by the heating wire 604 is isolated through double effects of the inner wall 1201 and the notch barrel, and the effect is more obvious. The shape of the notched cylinder is substantially the same as the shape of the space enclosed by the inner wall 1201 and the outer wall 1202, so that the heating unit 6 is fitted in the space enclosed by the inner wall 1201 and the outer wall 1202.

The arrangement of the electric control element 7 can refer to the arrangement in the first embodiment, and the opening portion 1203 is equivalent to the notch 8 in the first embodiment.

the electric control element 7 can extend into the opening portion 1203 to fully utilize the internal space of the housing 1, so as to reduce the volume of the hair dryer.

The electric control element 7 can be welded on the circuit board, the clamping groove 11 is formed in the inner wall 1201, the circuit board is plate-shaped, the edge of the circuit board is matched with the clamping groove 11, the installation reliability is improved, and the circuit board cannot shift when the electric hair drier falls off and shakes. In this example, the electric control element 7 is preferably disposed toward the opening portion 1203, that is, the electric control element 7 has a certain height, and the electric control element 7 extends from the circuit board toward the opening portion 1203.

The fan unit 5 draws an air flow into the handle assembly 2, the air flow from the handle assembly 2 enters between the inner wall 1201 and the outer wall 1202, the first air outlet 4 is defined by the inner wall 1201 and the outer wall 1202, and the air flow of the main duct 19 is blown out from the first air outlet 4. The inner wall 1201 and the outer shell 1 define a second air outlet 17, the air current entrainment airflow blown out from the first air outlet 4 enters the electric hair drier from the second air inlet 16 and enters the space between the inner wall 1201 and the outer shell 1, and is blown out from the second air outlet 17, the air current entrainment airflow entering the electric hair drier is cold air current, and the cold air current carries away heat generated by the electric control element 7. And the temperature rise of the heat insulation part 601 (inner wall 1201) caused by the heat radiation of the heating wire 604 can be reduced by cold air flow, so that the electric control element 7 in the space between the inner wall 1201 and the casing 1 is in a better working environment.

The above embodiments are merely preferred embodiments of the present invention, not all embodiments of the present invention, and according to the principles of the present invention, those skilled in the art can make various modifications without departing from the spirit of the present invention, all of which shall fall within the scope of the present invention defined by the claims.

Claims (10)

1. the utility model provides a reliable operation's hairdryer, includes shell and the handle components who is connected with the shell, the front end of shell is equipped with first air outlet, be equipped with first air intake on the handle components, the hairdryer still includes the main wind channel that extends to first air outlet from first air intake, sets up the fan unit that is used for the suction air current to get into the hairdryer from first air intake and the heating unit that is used for heating this air current in the main wind channel, the fan unit includes the flabellum and is used for driving the rotatory motor of flabellum, its characterized in that, the rear end of shell is equipped with the second air intake, and the front end is equipped with the second air outlet, the hairdryer still includes electric control element and extends to the second air outlet from the second air intake and gives electric control element radiating supplementary wind channel, just it is independent of main wind channel.

2. The hair dryer of claim 1, wherein the main air duct comprises a first section extending along the axial direction of the housing, and the rear end of the first section is spaced from the second air inlet and is arranged in a sealing manner.

3. The hair dryer of claim 2, wherein the electric control element is arranged between the rear end of the first section and the second air inlet.

4. A hair dryer according to claim 1, characterized in that the electric control element is located upstream of the heating unit.

5. The hair dryer of claim 2 wherein said housing further has an inner barrel defining said first section, said heating unit is disposed within said inner barrel, and the rear end of said inner barrel is sealed by a seal.

6. The hair dryer of claim 5, wherein said first section is located within the auxiliary air duct.

7. A hair dryer according to claim 2, characterized in that a non-closed duct defining the first section is further provided in the housing, said non-closed duct having an open portion extending in the direction of its axis, said duct comprising an inner wall and an outer wall, said heating unit being provided between the inner wall and the outer wall, the rear end of said non-closed duct being sealed by a seal.

8. Hair dryer according to any one of claims 1 to 7, characterized in that said heating unit comprises a thermal insulation element having a hollow channel, said hair dryer further comprising an electrically controlled element arranged inside said hollow channel.

9. A hair dryer according to claim 5 or 7, wherein the sealing member comprises a heat conducting member, one side of which is attached to the electrical control element and the other side of which is located in the main air duct.

10. A hair dryer according to any of claims 1 to 7, characterized in that the motor is a brushless motor and the electric control element constitutes the control circuit of the brushless motor.