Hair dryer with double air duct structure and air outlet and heat dissipation method of hair dryer

Abstract

The present invention discloses a hair dryer with a double air duct structure and a method for discharging and dissipating air of the hair dryer, wherein the main air duct mechanism includes an air duct shell component, a fan and a heating device; an annular outer air duct and a circular inner air duct nested in the annular outer air duct are formed in the air duct shell component; the fan is accommodated in the air duct shell component, the air outlet of the fan is guided to the annular outer air duct, and another part of the air outlet of the fan is guided to the circular inner air duct; the heating part of the heating device is arranged in the circular inner air duct to heat the air outlet in the circular inner air duct; the air flow passes through the first heat dissipation air duct and the second heat dissipation air duct in sequence, thereby dissipating heat for the battery and the electronic control mechanism. The present invention mainly solves the problem of how to provide a hair dryer in which hot air is not easy to diffuse and has good internal heat dissipation performance; the present invention enables the battery and the electronic control mechanism to have a good heat dissipation effect, and the air outlet of the annular outer air duct forms an annular wind curtain to prevent the hot air from being cooled by the outside air, and the heat preservation and heating effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and in particular to a hair dryer with a double air duct structure and an air outlet and heat dissipation method of the hair dryer. Background Art

[0002] A hair dryer can dry hair and assist in hair styling, and is an essential electrical appliance at home and in the styling industry.

[0003] As a mature product, hair dryers in the prior art already have good and complete designs in terms of functions and structures such as air inlet and outlet ducts, temperature control of heating devices, negative ion generators and even holding mechanisms. At the same time, hair dryers also have a variety of beautiful appearance designs in order to attract more consumers.

[0004] However, the hair dryer in the prior art still has a series of imperfections:

[0005] 1. Although the hair dryer can control the hotness and coldness of the air by starting and stopping the heating device, this control method can only realize the switching between hot and cold air (only hot air can be blown out at the same time, or only cold air can be blown out), and the hair dryer cannot blow out hot and cold air at the same time; in addition, when the hair dryer blows out hot air, the hot air is freely diffused outside the hair dryer, and the outside air can easily cool the hot air;

[0006] 2. Some hair dryers are powered by built-in batteries. As the hair dryer works for a long time, the batteries and electronic control devices inside the hair dryer will have serious heating problems.

[0007] In summary, how to provide a hair dryer in which hot air is not easily diffused and has good internal heat dissipation performance has become a problem that needs to be solved urgently. Summary of the invention

[0008] The object of the present invention is to provide a hair dryer with a double air duct structure and an air outlet and heat dissipation method of the hair dryer, which has the advantages that hot air is not easy to diffuse and the internal heat dissipation performance is good.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hair dryer with a dual air duct structure, comprising a shell mechanism, a main air duct mechanism, a battery and an electric control mechanism; the shell mechanism comprises a main body part and a hand-held part connected to each other; the main air duct mechanism comprises an air duct shell component, a fan and a heating device; an annular outer air duct is formed in the air duct shell component, and a circular inner air duct is nested in the annular outer air duct; the fan is accommodated in the air duct shell component, at least a part of the air outlet of the fan is guided to the annular outer air duct, and at least another part of the air outlet of the fan is guided to the circular inner air duct; the heating part of the heating device is arranged in the circular inner air duct to heat the air outlet in the circular inner air duct; an air inlet grille is arranged at the rear end of the main body part of the shell mechanism; the air duct outer duct of the main air duct mechanism The shell member is supported in the main part of the shell mechanism, and there is a gap between the outer wall of the air duct shell member and the inner wall of the main part, and the gap is the first heat dissipation air duct; the inner cavity of the hand-held part of the shell mechanism is the second heat dissipation air duct, and the second heat dissipation air duct is interconnected with the first heat dissipation air duct, and a plurality of air inlet holes connected to the second heat dissipation air duct are opened on the outer wall of the hand-held part; the battery and the electronic control mechanism are both accommodated in the first heat dissipation air duct and / or the second heat dissipation air duct; the battery is electrically connected to the heating device and the fan via at least a part of the electronic control mechanism, and is used to provide electrical energy for the heating device and the fan; when the fan of the main air duct mechanism takes in air, the airflow passes through the first heat dissipation air duct and the second heat dissipation air duct in sequence, thereby dissipating heat for the battery and the electronic control mechanism.

[0010] In the above technical scheme, an air inlet, a fan fixing part and an air duct part are sequentially arranged along the axial direction of the air duct shell component, and a heating device fixing part is arranged in the air duct part; the annular outer air duct and the circular inner air duct are both located in the air duct part of the air duct shell component; the fan is accommodated and fixed in the fan fixing part of the air duct shell component, and the air inlet end of the fan faces the air inlet of the air duct shell component, and the air outlet end of the fan faces the air duct part of the air duct shell component; the heating device is accommodated and fixed in the heating device fixing part of the air duct shell component.

[0011] In the above technical solution, the main air duct mechanism also includes an air duct dividing component, which is supported in the air duct outer shell component and is coaxially arranged with the air duct outer shell component, and there is a gap between the air duct dividing component and the air duct outer shell component; the air duct dividing component divides the air duct part of the air duct outer shell component into the annular outer air duct and the circular inner air duct.

[0012] In the above technical solution, at least two heating devices are provided, and at least one of the heating devices is a first heating element that applies alternating current, and at least another heating device is a second heating element that applies direct current.

[0013] In the above technical solution, a fixing ring is arranged inside the main part of the shell assembly, and the fan of the main air duct mechanism is supported inside the main part of the shell mechanism through the fixing ring; the inner wall of the main part of the shell mechanism, the outer wall of the first outer air duct guide wall of the main air duct mechanism and the fixing ring form the first heat dissipation air duct; a plurality of through holes are opened on the fixing ring, so that the first heat dissipation air duct and the second heat dissipation air duct are interconnected.

[0014] In the above technical solution, the battery is accommodated in the handheld portion of the shell mechanism and is located in the second heat dissipation duct.

[0015] In the above technical solution, the electronic control mechanism includes a control circuit board arranged in the first heat dissipation duct; the control circuit board is electrically connected to the battery for charging the battery; the control circuit board is also electrically connected to the fan, the first heating element and the second heating element of the heating device, respectively, for driving the fan, the first heating element and the second heating element to operate respectively.

[0016] In the above technical solution, the electric control mechanism further includes a switch circuit board; the switch circuit board is accommodated in the handheld portion of the shell mechanism and is located in the second heat dissipation duct; the switch circuit board is signal-connected to the control circuit board.

[0017] In the above technical solution, the hair dryer with a dual air duct structure of the present invention also includes a connector assembly; the connector assembly is arranged at the end of the handheld part of the shell assembly; the connector assembly is electrically connected to the control circuit board for introducing AC power to the control circuit board.

[0018] A method for discharging air and dissipating heat of a hair dryer, which uses the hair dryer with a double air duct structure; the method comprises:

[0019] Air intake stage:

[0020] The fan drives the airflow from the air inlet grille into the main part of the housing assembly and into the fan to complete the main air intake;

[0021] In addition, the fan drives the airflow to enter the handheld part of the housing assembly from the air inlet, and the airflow passes through the first heat dissipation air duct and the second heat dissipation air duct in sequence to dissipate heat for the battery and the electronic control mechanism, and then enters the fan to complete the secondary air intake;

[0022] Air outlet stage:

[0023] Directing at least a portion of the air output of the fan to the annular outer air duct, and directing at least another portion of the air output of the fan to the circular inner air duct;

[0024] heating the outlet air in the circular inner air duct by a heating device;

[0025] The air outlet of the annular outer air duct forms an annular air curtain, and the air outlet of the circular inner air duct can be enclosed in the annular air curtain.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the hair dryer with a dual air duct structure and the air outlet and heat dissipation method of the hair dryer of the present invention, after the fan and the heating device are started, the fan drives the airflow to enter the handheld part of the shell assembly from the air inlet, and the airflow passes through the first heat dissipation air duct and the second heat dissipation air duct in sequence to dissipate heat for the battery and the electronic control mechanism, so that the battery and the electronic control mechanism have a good heat dissipation effect; at least a part of the air outlet of the fan is guided to the annular outer air duct, so that cold air is blown out through the annular outer air duct, and at least another part of the air outlet of the fan is guided to the circular inner air duct, and the air outlet in the circular inner air duct is heated by the heating device, so that hot air is blown out through the circular inner air duct; in this way, the function of blowing out cold air and hot air at the same time is realized, and the air outlet of the fan can be guided to a more reasonable direction to avoid energy waste; in addition, the air outlet of the annular outer air duct forms an annular wind curtain, and the air outlet of the circular inner air duct can be enclosed in the annular wind curtain, so that the hot air is prevented from being cooled by the outside air, and the heat preservation and heating effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional view of the present invention.

[0028] Figure 2 for Figure 1 A is a partial enlarged view of the figure.

[0029] Figure 3 It is a cross-sectional view of the present invention.

[0030] Figure 4 It is a three-dimensional view of the main air duct mechanism in the present invention.

[0031] Figure 5 It is an exploded view of the main air duct mechanism in the present invention.

[0032] Figure 6 It is a cross-sectional view of the main air duct mechanism in the present invention.

[0033] The accompanying drawings are marked as follows: 1. shell mechanism; 11. main body; 12. air inlet grille; 13. hand-held part; 14. air inlet hole; 15. fixing ring; 16. through hole; 2. air duct shell component; 21. first outer air duct guide wall; 22. fan fixing part; 23. heating device fixing part; 24. air duct part; 25. shell component monomer; 26. air inlet; 3. air duct dividing component; 31. second outer air duct guide wall; 32. inner air duct guide wall; 33. supporting foot; 34. guide component monomer; 4. fan; 51. first heating element; 52. second heating element; 6. battery; 7. control circuit board; 8. switch circuit board; 9. connector assembly; 10. annular outer air duct; 20. circular inner air duct; 30. first heat dissipation air duct; 40. second heat dissipation air duct. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] See also Figure 1-Figure 3 The present embodiment provides a hair dryer with a dual air duct structure, which includes a shell mechanism 1, a main air duct mechanism, a battery 6 and an electronic control mechanism.

[0037] Among them, the shell mechanism 1 is a shell made of engineering plastic material, and the shell mechanism 1 includes a main part 11 and a hand-held part 13 that are connected to each other; an air inlet grille 12 is provided at the rear end of the main part 11 of the shell mechanism 1. In fact, the air inlet grille 12 is a filter net with a large number of mesh holes, which can allow air to pass through and can prevent dust and hair from entering the shell mechanism 1.

[0038] The main air duct mechanism includes an air duct housing component 2, a fan 4 and a heating device.

[0039] Specifically, the air duct shell component 2 is a shell made of engineering plastic material, which is used to provide basic support and functional structure; the fan 4 is a fan driven by a DC motor or an AC motor, which can achieve a directional air outlet function through rotating fan blades; the heating device is a PTC heater or a resistive heater.

[0040] An annular outer air duct 10 is formed in the air duct shell component 2, and a circular inner air duct 20 is nested in the annular outer air duct 10; the fan 4 is accommodated in the air duct shell component 2, at least a part of the air outlet of the fan 4 is guided to the annular outer air duct 10, and at least another part of the air outlet of the fan 4 is guided to the circular inner air duct 20; the heating part of the heating device is arranged in the circular inner air duct 20 to heat the air outlet in the circular inner air duct 20.

[0041] The air duct shell component 2 of the main air duct mechanism is supported in the main part 11 of the shell mechanism 1, and there is a gap between the outer wall of the air duct shell component 2 and the inner wall of the main part 11, and the gap is the first heat dissipation air duct 30; in fact, the air duct shell component 2 is fixed in the main part 11 of the shell mechanism 1 through a support beam.

[0042] The inner cavity of the handheld part 13 of the housing mechanism 1 is a second heat dissipation duct 40 , and the second heat dissipation duct 40 is connected to the first heat dissipation duct 30 . A plurality of air inlet holes 14 connected to the second heat dissipation duct 40 are formed on the outer wall of the handheld part 13 .

[0043] The battery 6 and the electric control mechanism are both accommodated in the first heat dissipation duct 30 and / or the second heat dissipation duct 40; the battery 6 is electrically connected to the heating device and the fan 4 via at least a part of the electric control mechanism, and is used to provide electric energy to the heating device and the fan 4;

[0044] When the fan 4 of the main air duct mechanism takes in air, the airflow passes through the first heat dissipation air duct 30 and the second heat dissipation air duct 40 in sequence, thereby dissipating heat for the battery 6 and the electronic control mechanism.

[0045] See also Figure 4-Figure 6 Specifically, an air inlet 26, a fan fixing portion 22 and an air duct portion 24 are sequentially arranged along the axial direction of the air duct shell member 2, and a heating device fixing portion 23 is arranged in the air duct portion 24; the annular outer air duct 10 and the circular inner air duct 20 are both located in the air duct portion 24 of the air duct shell member 2; the fan 4 is accommodated and fixed in the fan fixing portion 22 of the air duct shell member 2, and the air inlet end of the fan 4 faces the air inlet 26 of the air duct shell member 2, and the air outlet end of the fan 4 faces the air duct portion 24 of the air duct shell member 2. In the present embodiment, the fan 4 is clamped and fixed in the fan fixing portion 22 of the air duct shell member 2; the heating device is accommodated and fixed in the heating device fixing portion 23 of the air duct shell member 2. In the present embodiment, the heating device is clamped and fixed in the heating device fixing portion 23 of the air duct shell member 2.

[0046] Specifically, the main air duct mechanism also includes an air duct dividing component 3, which is supported in the air duct shell component 2 and is coaxially arranged with the air duct shell component 2, and there is a gap between the air duct dividing component 3 and the air duct shell component 2; the air duct dividing component 3 divides the air duct part 24 of the air duct shell component 2 into an annular outer air duct 10 and a circular inner air duct 20.

[0047] More specifically, the air duct shell component 2 is composed of two shell component monomers 25 that are combined with each other, that is, the shell component monomer 25 is an integrally injection-molded engineering plastic material half shell, the openings of the two shell component monomers 25 are engaged with each other, and are fixed to each other by snaps or screws, thereby forming the air duct shell component 2; the air duct dividing component 3 is composed of four guide component monomers 34 that are alternately spaced end to end and connected left to right, the openings of the guide component monomers 34 are engaged with each other, and are fixed to each other by snaps or screws, thereby forming the air duct dividing component 3.

[0048] More specifically, the air duct partitioning member 3 is supported in the air duct housing member 2 by the supporting legs 33 , so that there is a gap between the air duct partitioning member 3 and the air duct housing member 2 . In fact, the supporting legs 33 and the guide member monomer 34 are integrally injection molded.

[0049] After the above-mentioned structure is assembled, the inner wall of the air duct outer shell component 2 is the first outer air duct guide wall 21; the outer wall of the air duct dividing component 3 is the second outer air duct guide wall 31, and the inner wall of the air duct dividing component 3 is the inner air duct guide wall 32; the annular outer air duct 10 is the space between the first outer air duct guide wall 21 of the air duct outer shell component 2 and the second outer air duct guide wall 31 of the air duct dividing component 3, and the circular inner air duct 20 is the space inside the inner air duct guide wall 32.

[0050] Furthermore, the air duct portion 24 of the air duct shell component 2 and the air duct dividing component 3 both gradually expand from the inlet end to the outlet end, that is, the air duct portion 24 of the air duct shell component 2 and the air duct dividing component 3 are both trumpet-shaped, so that the air outlet of the fan 4 can be diffused in the annular outer air duct 10 and the circular inner air duct 20, respectively, to obtain a larger air outlet range.

[0051] Furthermore, the heating device is arranged as a heating part and an outer ring part in sequence from the inside to the outside along its radial direction; for the PTC heater: the heating part is a honeycomb heating net, which can allow airflow to pass through and heat the passing airflow, and the outer ring part is a metal fin group. Based on the heat pump principle, when the heating part is heated, the temperature of the outer ring part drops; the outer ring part of the heating device is clamped in the heating device fixing part 23 of the air duct shell component 2, and the heating part of the heating device is supported in the circular inner air duct 20. Specifically, the heating device fixing part 23 is a clamping groove in the air duct part 24, and the outer ring part of the heating device is clamped in the clamping groove.

[0052] Furthermore, there are at least two heating devices, and at least one of the heating devices is a first heating element 51 that uses alternating current, and at least another heating device is a second heating element 52 that uses direct current; in this embodiment, there are two heating devices, one of which is the first heating element 51, and the other is the second heating element 52, and accordingly, two heating device fixing parts 23 are provided on the air duct shell component 2; heating devices powered by alternating current and low-voltage direct current are respectively provided, so that the heating devices are suitable for being powered by alternating current and battery 6, respectively, thereby expanding the scope of application of the hair dryer.

[0053] Specifically, a fixing ring 15 is provided in the main part 11 of the shell assembly 1. The fixing ring 15 can be an independent component or can be integrally formed with the main part 11 of the shell assembly 1. The fan 4 of the main air duct mechanism is supported in the main part 11 of the shell mechanism 1 through the fixing ring 15. In fact, it is the fan fixing part 22 of the air duct shell member 2 that is supported in the main part 11 of the shell mechanism 1 through the fixing ring 15; the inner wall of the main part 11 of the shell mechanism 1, the outer wall of the first outer air duct guide wall 21 of the main air duct mechanism and the fixing ring 15 form a first heat dissipation duct 30; a plurality of through holes 16 are opened on the fixing ring 15, so that the first heat dissipation duct 30 is connected to the second heat dissipation duct 40.

[0054] Specifically, the battery 6 is accommodated in the hand-held portion 13 of the housing mechanism 1 and is located in the second heat dissipation duct 40 ; in fact, the battery 6 can be fixed in the hand-held portion 13 of the housing mechanism 1 by adhesive or a bracket.

[0055] Specifically, the electric control mechanism includes a control circuit board 7 arranged in the first heat dissipation duct 30, and the control circuit board 7 is a printed circuit board (PCB), and the control circuit board 7 integrates a main control, a rectifier module based on power electronic devices, a motor drive module and an AC control module; the control circuit board 7 is electrically connected to the battery 6 for charging the battery 6; in fact, the control circuit board 7 can be fixed in the main body 11 of the shell mechanism 1 by adhesive or a bracket; the control circuit board 7 is also electrically connected to the fan 4, the first heating element 51 and the second heating element 52 of the heating device, respectively, for driving the fan 4, the first heating element 51 and the second heating element 52 to operate respectively.

[0056] Specifically, the electric control mechanism also includes a switch circuit board 8, which is a printed circuit board (PCB). The switch circuit board 8 is integrated with a dial key and a micro switch for sending key signals to the outside; the switch circuit board 8 is accommodated in the hand-held part 13 of the shell mechanism 1 and is located in the second heat dissipation duct 40. In fact, the switch circuit board 8 can be fixed in the hand-held part 13 of the shell mechanism 1 by glue or a bracket; the switch circuit board 8 is signal-connected to the control circuit board 7, and the two are actually connected by wires and connectors.

[0057] Furthermore, the hair dryer with a dual air duct structure of this embodiment also includes a connector assembly 9, which includes a male end and a female end, the male end is a 220V AC power cord, and the female end is a socket; the connector assembly 9 is arranged at the end of the hand-held part 13 of the shell assembly 1, specifically, the female end of the connector assembly 9 is arranged at the end of the hand-held part 13 of the shell assembly 1; the connector assembly 9 is electrically connected to the control circuit board 7, and is used to introduce AC power to the control circuit board 7.

[0058] In the hair dryer with a double air duct structure of the present embodiment, after the fan 4 and the heating device are started, the fan 4 drives the airflow to enter the handheld part 13 of the housing assembly 1 from the air inlet 14, and the airflow passes through the first heat dissipation air duct 30 and the second heat dissipation air duct 40 in sequence to dissipate heat for the battery 6 and the electronic control mechanism, so that the battery 6 and the electronic control mechanism have a good heat dissipation effect; at least a part of the air outlet of the fan 4 is guided to the annular outer air duct 10, so that cold air is blown out through the annular outer air duct 10, and at least another part of the air outlet of the fan 4 is guided to the circular inner air duct 20, and the air outlet in the circular inner air duct 20 is heated by the heating device, so that hot air is blown out through the circular inner air duct 20; in this way, the function of blowing out cold air and hot air at the same time is realized, and the air outlet of the fan 4 can be guided to a more reasonable direction to avoid energy waste; in addition, the air outlet of the annular outer air duct 10 forms an annular air curtain, and the air outlet of the circular inner air duct 20 can be enclosed in the annular air curtain, so that the hot air is prevented from being cooled by the outside air, and the heat preservation and heating effect is good.

[0059] Embodiment 2:

[0060] This embodiment provides an air outlet and heat dissipation method for a hair dryer, which applies the hair dryer with a double air duct structure in the first embodiment; the method comprises:

[0061] Air intake stage:

[0062] The fan 4 drives the airflow from the air inlet grille into the main body 11 of the housing assembly 1 and into the fan 4 to complete the main air intake;

[0063] Furthermore, the fan 4 drives the airflow to enter the handheld portion 13 of the housing assembly 1 from the air inlet 14, and the airflow passes through the first heat dissipation duct 30 and the second heat dissipation duct 40 in sequence to dissipate heat for the battery 6 and the electronic control mechanism, and then enters the fan 4 to complete the secondary air intake;

[0064] Air outlet stage:

[0065] Directing at least a portion of the air output of the fan 4 to the annular outer air duct 10, and directing at least another portion of the air output of the fan 4 to the circular inner air duct 20;

[0066] Heating the outlet air in the circular inner air duct 20 by a heating device;

[0067] The air outlet of the annular outer air duct 10 forms an annular air curtain, and the air outlet of the circular inner air duct 20 can be enclosed in the annular air curtain.

[0068] The air outlet and heat dissipation method of the hair dryer of this embodiment is that after the fan 4 and the heating device are started, the fan 4 drives the airflow to enter the handheld part 13 of the shell assembly 1 from the air inlet 14, and the airflow passes through the first heat dissipation duct 30 and the second heat dissipation duct 40 in sequence to dissipate heat for the battery 6 and the electronic control mechanism, so that the battery 6 and the electronic control mechanism have a good heat dissipation effect; at least a part of the air outlet of the fan 4 is guided to the annular outer air duct 10, so that cold air is blown out through the annular outer air duct 10, and at least another part of the air outlet of the fan 4 is guided to the circular inner air duct 20, and the air outlet in the circular inner air duct 20 is heated by the heating device, so that hot air is blown out through the circular inner air duct 20; in this way, the function of blowing out cold air and hot air at the same time is realized, and the air outlet of the fan 4 can be guided to a more reasonable direction to avoid energy waste; in addition, the air outlet of the annular outer air duct 10 forms an annular air curtain, and the air outlet of the circular inner air duct 20 can be enclosed in the annular air curtain, so that the hot air is prevented from being cooled by the outside air, and the heat preservation and heating effect is good.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hair dryer with a double air duct structure, characterized in that: It includes a shell mechanism, a main air duct mechanism, a battery and an electric control mechanism; The housing mechanism comprises a main body portion and a hand-held portion connected to each other; The main air duct mechanism comprises an air duct shell component, a fan and a heating device; an annular outer air duct is formed in the air duct shell component, and a circular inner air duct is nested in the annular outer air duct; the fan is accommodated in the air duct shell component, at least a part of the air outlet of the fan is guided to the annular outer air duct, and at least another part of the air outlet of the fan is guided to the circular inner air duct; the heating part of the heating device is arranged in the circular inner air duct to heat the air outlet in the circular inner air duct; An air inlet grille is disposed at the rear end of the main body of the shell mechanism; The air duct shell component of the main air duct mechanism is supported in the main body of the shell mechanism, and there is a gap between the outer wall of the air duct shell component and the inner wall of the main body, and the gap is the first heat dissipation air duct; The inner cavity of the handheld part of the shell mechanism is a second heat dissipation duct, and the second heat dissipation duct is connected to the first heat dissipation duct, and a plurality of air inlet holes connected to the second heat dissipation duct are opened on the outer wall of the handheld part; The battery and the electric control mechanism are both accommodated in the first heat dissipation duct and / or the second heat dissipation duct; the battery is electrically connected to the heating device and the fan via at least a part of the electric control mechanism, and is used to provide electric energy for the heating device and the fan; When the fan of the main air duct mechanism takes in air, the airflow passes through the first heat dissipation air duct and the second heat dissipation air duct in sequence, thereby dissipating heat for the battery and the electronic control mechanism; At least two heating devices are provided, and at least one of the heating devices is a first heating element that uses alternating current, and at least another heating device is a second heating element that uses direct current; A fixing ring is arranged in the main body of the housing assembly, and the fan of the main air duct mechanism is supported in the main body of the housing mechanism through the fixing ring; The inner wall of the main body of the shell mechanism, the outer wall of the first outer air duct guide wall of the main air duct mechanism and the fixing ring form the first heat dissipation air duct; The fixing ring is provided with a plurality of through holes, so that the first heat dissipation air duct and the second heat dissipation air duct are connected to each other.

2. The hair dryer with a double air duct structure according to claim 1, characterized in that: An air inlet, a fan fixing portion and an air duct portion are sequentially arranged along the axial direction of the air duct housing component, and a heating device fixing portion is arranged in the air duct portion; The annular outer air duct and the circular inner air duct are both located in the air duct portion of the air duct housing component; The fan is accommodated and fixed in the fan fixing part of the air duct shell component, and the air inlet end of the fan faces the air inlet of the air duct shell component, and the air outlet end of the fan faces the air duct part of the air duct shell component; The heat generating device is accommodated and fixed in the heat generating device fixing portion of the air duct housing component.

3. The hair dryer with a double air duct structure according to claim 2, characterized in that: The main air duct mechanism further includes an air duct partitioning member, the air duct partitioning member is supported in the air duct housing member and is coaxially arranged with the air duct housing member, and a gap is formed between the air duct partitioning member and the air duct housing member; The air duct dividing member divides the air duct portion of the air duct housing member into the annular outer air duct and the circular inner air duct.

4. The hair dryer with a double air duct structure according to claim 1, characterized in that: The battery is accommodated in the handheld portion of the housing mechanism and is located in the second heat dissipation duct.

5. The hair dryer with a double air duct structure according to claim 1, characterized in that: The electric control mechanism includes a control circuit board arranged in the first heat dissipation duct; The control circuit board is electrically connected to the battery and is used to charge the battery; The control circuit board is also electrically connected to the fan, the first heating element and the second heating element of the heating device, respectively, and is used to drive the fan, the first heating element and the second heating element to operate, respectively.

6. The hair dryer with a double air duct structure according to claim 5, characterized in that: The electric control mechanism also includes a switch circuit board; The switch circuit board is accommodated in the hand-held portion of the housing mechanism and is located in the second heat dissipation duct; The switch circuit board is signal-connected to the control circuit board.

7. The hair dryer with a double air duct structure according to claim 5, characterized in that: Also included is a connector assembly; The connector assembly is disposed at the end of the handheld portion of the housing assembly; The connector assembly is electrically connected to the control circuit board and is used to introduce AC power to the control circuit board.

8. A method for discharging air and dissipating heat of a hair dryer, characterized in that: It applies the hair dryer with a double air duct structure as described in any one of claims 1 to 7; It includes: Air intake stage: The fan drives the airflow from the air inlet grille into the main part of the housing assembly and into the fan to complete the main air intake; In addition, the fan drives the airflow to enter the handheld part of the housing assembly from the air inlet, and the airflow passes through the first heat dissipation air duct and the second heat dissipation air duct in sequence to dissipate heat for the battery and the electronic control mechanism, and then enters the fan to complete the secondary air intake; Air outlet stage: Directing at least a portion of the air output of the fan to the annular outer air duct, and directing at least another portion of the air output of the fan to the circular inner air duct; heating the outlet air in the circular inner air duct by a heating device; The air outlet of the annular outer air duct forms an annular air curtain, and the air outlet of the circular inner air duct can be enclosed in the annular air curtain.

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