Hair dryer

Abstract

A hair dryer, comprising a housing and an airflow channel (100), an air heating part (06), a first fan (01), a second fan (02), a first motor (65), a second motor (66) and a control system (70) which are provided in the housing. The air heating part (06), the first fan (01), and the second fan (02) are provided in the airflow channel (100); the first fan (01) is separated from the second fan (02) in the airflow channel (100); the first fan (01) is driven by the first motor (65); the second fan (02) is driven by the second motor (66); the control system controls the first fan (01) and the second fan (02) to rotate simultaneously; the airflow channel (100) further comprises an airflow collecting area (80) provided between the first fan (01) and the second fan (02); and the distance between the first fan (01) and the second fan (02) is at least 10% greater than the radius of the first fan (01). By means of cooperation of the two fans, the problems of the excessively-high temperature and premature wear of a high-speed motor due to prolonged high power consumption are mitigated, thereby prolonging the service life of the high-speed motor; and additionally, the air flow or / and the airflow speed of the hair dryer is / are increased by reasonably designing the airflow channel (100).

Description

Hair dryer TECHNICAL FIELD

[0001] The present application relates to the technical field of hair dryer, in particular to a hair dryer with two fans. BACKGROUND

[0002] The existing hair dryer usually uses high-speed motor to drive the fan to generate high-speed airflow by high-speed rotation to dry the water on the hair and achieve the purpose of drying the hair faster. However, the high-speed motor rotates at high speed, which causes the motor to be quickly worn out, thereby shortening the service life of the product.

[0003] Therefore, there is a need for a new solution. SUMMARY

[0004] The main purpose of the present application is to provide a hair dryer with two fans, which can achieve better hair drying performance by the design of the airflow channel and the distance and speed cooperation of the two fans, and also solve the problem of short service life.

[0005] According to one aspect of the present application, the present application provides a hair dryer, comprising a shell, an airflow channel, an air heating part, a first fan, a second fan, a first motor, a second motor and a control system arranged in the shell, the air heating part, the first fan and the second fan are arranged in the airflow channel, the first fan and the second fan are arranged separately in the airflow channel, the first fan is driven by the first motor, the second fan is driven by the second motor, and the control system controls the first fan and the second fan to rotate simultaneously; the airflow channel further comprises an airflow collection area arranged between the first fan and the second fan; the distance between the first fan and the second fan is at least 10% longer than the radius length of the first fan.

[0006] The hair dryer provided by the present application has the following advantages: by arranging the air heating part, the first fan and the second fan in the airflow channel and simultaneously controlling their operation by the control system, the air flow and air flow speed can be increased, and by the larger air flow and air flow speed, the hair dryer can dry the hair faster and improve the hair drying effect; in order to reduce the load of a single motor, the present application provides a design of using two fans to work together, which disperses the power consumption to two motors, so that the load of the high-speed motor is dispersed and the overheating loss caused by too high power consumption is avoided, thereby greatly prolonging the service life of the hair dryer; the airflow collection area arranged between the first fan and the second fan in the airflow channel further optimizes the airflow effect and ensures that the airflow is reasonably distributed and strengthened in the collection area, so that the hair drying effect of the hair dryer is more uniform and powerful. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only only the embodiments of the application, and for those skilled in the art, other drawings can be obtained on the premise of not creating labor according to the provided drawings:

[0008] Fig. 1 shows a cross-sectional view of a hair dryer according to an embodiment of the application;

[0009] Fig. 2 shows a cross-sectional view of a hair dryer according to an embodiment of the application, wherein the airflow flow path is shown;

[0010] Fig. 3 shows a cross-sectional view of a hair dryer according to an embodiment of the application, wherein a first regulated airflow is included;

[0011] Fig. 4 shows a cross-sectional view of a hair dryer according to an embodiment of the application, wherein a second regulated airflow is included;

[0012] Fig. 5 shows a cross-sectional view of a hair dryer according to another embodiment of the application;

[0013] Fig. 6 shows a schematic diagram of a power supply for a hair dryer according to the application. Embodiments of the application

[0014] For the purpose of facilitating the understanding of the application, the application will be described more fully below with reference to the accompanying drawings. The accompanying drawings show typical embodiments of the application. However, the application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided for the purpose of making the disclosure of the application more thorough and comprehensive.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs. The terminology used in the description of the application herein only for the purpose of describing specific embodiments of the application and is not intended to limit the application.

[0016] To achieve the above object, the application provides a hair dryer with two fans. Referring to Fig. 1, the hair dryer provided by the application comprises a shell and an air flow channel 100 arranged in the shell. The air flow channel 100 is provided with an air heating part 06, a first fan 01, a second fan 02, a first motor 65 for driving the first fan 01, a second motor 66 for driving the second fan, and a control system for controlling the first fan and the second fan to rotate simultaneously. The first fan 01 and the second fan 02 are arranged separately in the air flow channel 100, and the first fan 01 and the second fan 02 are provided with an air flow collection area 80. The distance between the first fan 01 and the second fan 02 is at least 10% longer than the radius length of the first fan. In use, the control system controls the first motor and the second motor to drive the first fan and the second fan to rotate simultaneously, and the generated air flow is collected in the air flow collection area between the first fan and the second fan, so as to increase the air flow and the air flow speed. Through the larger air flow and the air flow speed, the hair dryer can dry the hair faster and improve the blowing effect. At the same time, the two fans are driven by the respective motors, and under the same power consumption, the load of the single motor can be reduced, the problem of high temperature and rapid wear caused by long-term high power consumption of the high-speed motor can be reduced, and the working life of the high-speed motor can be prolonged.

[0017] Specifically, in an embodiment of the application, as shown in Fig. 1, the air flow channel 100 comprises an air inlet 04 and an air outlet 05. The first fan 01 is arranged between the air heating part 06 and the air inlet 04, the second fan 02 is arranged between the first fan 01 and the air inlet 04, and the air enters the air inlet 04, passes through the second fan, the first fan and the air heating part in sequence, and then reaches the air outlet.

[0018] Further, in an embodiment of the application, the air flow channel 100 comprises a first end 51 and a second end 52, the air outlet 05 is arranged at the first end 51, the air inlet 04 is arranged at the second end 52, the air heating part 06 is arranged between the first end 51 and the first fan 01, the second fan 02 is arranged between the first fan 01 and the second end 52, the air flow 101 flows from the second fan 02 to the first fan 01, passes through the first fan 01, is accelerated by the first fan 01, and then enters the air heating part 06. The air flow is heated and then blown out from the air outlet 05.

[0019] Specifically, in an embodiment of the present application, the first fan 01 comprises a first rotating shaft 10 and a first fan edge, the distance between the axis of the first rotating shaft 10 and the outer edge of the first fan is the radius of the first fan; the second fan 02 comprises a second rotating shaft 20 and a second fan edge, the distance between the axis of the second rotating shaft and the outer edge of the second fan is the radius of the second fan; the distance between the first fan 01 and the second fan 02 is at least 10% longer than the length of the radius of the second fan, so as to ensure that the airflow can be fully collected in the airflow collection area, thereby optimizing the distribution and strengthening of the airflow, and making the blowing effect of the hair dryer more uniform and powerful.

[0020] Further, in an embodiment of the present application, the first rotating shaft 10 comprises a first proximal end 11 and a first distal end 12, the second rotating shaft 20 comprises a second proximal end 21 and a second distal end 22, the first distal end 12 and the second proximal end 21 are arranged between the first proximal end 11 and the second distal end 22, the distance between the first distal end 12 and the second proximal end 21 is at least 10% longer than the length of the first radius or / and the second radius, and the first rotating shaft 10 and the second rotating shaft 20 are not connected, so that the first fan 01 and the second fan 02 can be driven to rotate at different speeds by the first motor 65 and the second motor 66 respectively. By controlling the first fan and the second fan to rotate at different speeds at the same time, the distribution and control of the airflow can be optimized, and more stable airflow output can be provided.

[0021] Further, in an embodiment of the present application, the first rotating shaft 10 and the second rotating shaft 20 are arranged separately on the same axis, and the axial distance between the first distal end 12 and the second proximal end 21 is at least 10% longer than the length of the first radius or / and the second radius. By setting the axial distance between the first distal end of the first rotating shaft and the second proximal end of the second rotating shaft to be at least 10% longer than the length of the first radius or / and the second radius, the size of the airflow collection area can be ensured to be sufficient for the collection of airflow, thereby providing greater airflow.

[0022] Specifically, in one embodiment of the present invention, as shown in FIG2, a first airflow path 81 and a second airflow path 82 are provided between the air inlet 04 and the airflow gathering area 80. The first airflow path 81 extends from the air inlet 04 to the airflow gathering area 80, passes through the second fan 02, and enters the airflow gathering area 80. The second airflow path 82 extends from the air inlet 04 to the airflow gathering area 80, bypasses the second fan 02, and enters the airflow gathering area 80. The first airflow path 81 and the second airflow path 82 converge at the airflow gathering area 80. Furthermore, the first fan 01 and the second fan 02 rotate simultaneously at different speeds, driving the first airflow 83 through the first airflow path 81, and simultaneously driving the second airflow 84 through the second airflow path 82, where they converge in the airflow convergence area 80. The first airflow 83 enters the airflow channel 100 from the air inlet 04 through the first airflow path 81, passes through the second fan 02, is accelerated by the second fan 02, and then enters the airflow convergence area 80 to merge with the second airflow 84. The second airflow 84 enters the airflow channel 100 from the air inlet 04 through the second airflow path 82, bypasses the second fan 02, and is driven by the first airflow 83 into the airflow convergence area 80 to merge with the first airflow 83. Therefore, the first airflow in the first airflow path, blown by the second fan, and the second airflow in the second airflow path, not blown by the second fan, converge in the airflow convergence area. By increasing the second airflow path, the airflow rate and / or airflow speed of the blower can be adjusted.

[0023] Specifically, in one embodiment of the present invention, the airflow channel 100 includes a first inner pipe 61 and a second inner pipe 62, which are separately arranged within the airflow channel 100. A first fan 01 is disposed within the first inner pipe 61, and a second fan 02 is disposed within the second inner pipe 62. An airflow gathering area 80 is disposed between the first inner pipe 61 and the second fan 02. The second inner pipe 62 is close to the air inlet 04. The first airflow path 81 is within the second inner pipe 62, passes through the second fan 02, and enters the airflow gathering area 80. The second airflow path 82 is outside the second inner pipe 62, bypasses the second fan 02 and the second inner pipe 62, enters the airflow gathering area 80, and then enters the first inner pipe 61.

[0024] Specifically, in one embodiment of the present invention, the airflow channel 100 further includes an airflow channel outer wall 63 and an airflow heating pipe 64. The airflow channel outer wall 63 extends from the first end 51 to the second end 52, connecting the air inlet 04 and the air outlet 05. The first inner pipe 61 and the second inner pipe 62 are respectively disposed within the airflow channel outer wall 63. The airflow heating pipe 64 is disposed between the air outlet 05 and the first fan 01, and the air heating part 06 is disposed within the airflow heating pipe 64. The air inlet 04 includes a first airflow inlet 41 and a second airflow inlet 42. The first airflow inlet 41 is disposed upstream of the second inner pipe 62, and the second airflow inlet 42 is disposed between the airflow channel outer wall 63 and the second inner pipe 62. Therefore, the first airflow inlet 41 is surrounded by the second airflow inlet 42 and separated by the second inner pipe 62, and the first airflow flow path 81 is surrounded by the second airflow flow path 82. The first airflow entering the airflow channel through the first airflow inlet reaches the airflow convergence area along the first airflow flow path, and the second airflow entering the airflow channel through the second airflow inlet reaches the airflow convergence area along the second airflow flow path.

[0025] Specifically, in one embodiment of the present invention, the control system controls the first fan 01 and the second fan 02 to rotate simultaneously at different speeds through a preset speed combination. The control system includes at least a first preset speed combination and a second preset speed combination. The control system controls the speeds of the two fans according to the preset speed combination to achieve the best airflow effect. In the first preset speed combination, the speed of the first fan 01 is two times or more higher than the speed of the second fan 02, resulting in a greater airflow from the first fan 01. In the second preset speed combination, the speed of the first fan 01 is higher than that in the first preset speed combination, which further increases the airflow and provides a stronger airflow effect. By controlling the speeds of the two fans through preset speed combinations, the control system provides different options for the user, improving user satisfaction.

[0026] Specifically, in one embodiment of the present invention, the airflow channel 100 further includes an airflow regulating opening 43 and a regulating airflow path 85. The airflow regulating opening 43 is located at the first end 51 and adjacent to the air outlet 05. The regulating airflow path 85 extends from the airflow gathering area 80 between the outer wall 63 of the airflow channel and the first inner pipe 61, passing between the first inner pipe 61 and the outer wall 63 of the airflow channel, and between the airflow heating pipe 64 and the outer wall 63 of the airflow channel, extending beyond the first inner pipe 61 and the airflow heating pipe 64 to the airflow regulating opening 43. The first fan 01 and the second fan 02 rotate simultaneously and drive the airflow within the regulating airflow path 85 to generate a regulating airflow. The regulating airflow entering the airflow channel through the airflow regulating opening and the regulating airflow path can regulate the airflow entering the airflow gathering area through the air inlet, thereby changing the airflow rate and / or airflow speed of the blower.

[0027] Furthermore, in one embodiment of the present invention, the first fan 01 and the second fan 02 rotate at different speeds in combination, generating regulating airflows in different directions within the regulating airflow path 85. The regulating airflows include a first regulating airflow 86 as shown in FIG3 and a second regulating airflow 87 as shown in FIG4. As shown in FIG3, the first regulating airflow 86 flows from the airflow gathering area 80 into the space between the first inner pipe 61 and the outer wall 63 of the airflow channel, then flows into the space between the airflow heating pipe 64 and the outer wall 63 of the airflow channel, and flows out at the airflow regulating opening 43; the second regulating airflow 87 flows from the airflow regulating opening 43 into the space between the airflow heating pipe 64 and the outer wall 63 of the airflow channel, then flows into the space between the first inner pipe 61 and the outer wall 63 of the airflow channel, and then enters the airflow gathering area 80.

[0028] Furthermore, in one embodiment of the present invention, when the first fan 01 and the second fan 02 rotate at a first preset speed combination, they drive the airflow within the regulating airflow path 85 to generate a first regulating airflow 86; when the first fan 01 and the second fan 02 rotate at a second preset speed combination, they drive the airflow within the regulating airflow path 85 to generate a second regulating airflow 87. Since the speed of the first fan 01 in the second preset speed combination is higher than that in the first preset speed combination, when the first regulating airflow occurs, the airflow rate from the air outlet 05 increases and the velocity decreases; when the second regulating airflow occurs, the airflow velocity from the air outlet 05 increases and the flow rate decreases. Therefore, by adjusting the speed combination of the first fan 01 and the second fan 02, precise control of the airflow velocity and flow rate can be achieved to meet different user needs.

[0029] Furthermore, as shown in Figure 5, in another embodiment of the present invention, the first fan 01 and / or the second fan 02 are driven by a carbon-free motor; the first fan 01 and the second fan 02 rotate simultaneously at different speeds, with the speed of the first fan 01 being higher than that of the second fan 02. Compared with traditional brushed DC motors, the carbon-free motor does not require the use of carbon brushes to achieve rotor commutation, but instead achieves precise rotor control through a built-in electronic control system, thus enabling efficient and reliable power output.

[0030] Furthermore, the speed difference between the first fan 01 and the second fan 02 is 10,000 revolutions per minute or / and more than 10 percent; when the speed of the first fan 01 is higher than 40,000 revolutions per minute, the speed of the second fan 02 is lower than 30,000 revolutions per minute; when the speed of the first fan 01 is higher than 100,000 revolutions per minute, the speed of the second fan 02 is lower than 90,000 revolutions per minute. By fine-tuning the speed difference between the two fans, precise airflow regulation can be achieved to meet different user needs. By providing more flexible and intelligent airflow control, a more comfortable and practical user experience is created.

[0031] Specifically, in one embodiment of the present invention, the first fan 01 is driven by a first brushless motor 67, and the second fan 02 is driven by a second brushless motor 68. The first brushless motor is connected to the first inner pipe 61 via a guide vane 69. The first inner pipe 61 is heated by the first brushless motor 67, and the second fan 02 drives airflow towards the first inner pipe 61 to reduce its temperature, bringing the surface temperature of the first inner pipe 61 below 100 degrees Celsius. The airflow driven by the second fan 02 towards the first fan 01 reduces the power consumption of the brushless motor in rotating the first fan 01. The first brushless motor 67 transfers heat to the first inner pipe 61, while the second fan 02 blows air towards the first inner pipe 61 to reduce its temperature. This ensures that the surface temperature of the first inner pipe 61 remains below 100 degrees Celsius. Furthermore, the second fan 02 also guides airflow towards the vicinity of the first fan 01 to reduce the power consumption required for the first brushless motor 67 to drive the first fan 01. In this way, the second fan 02 helps reduce the operating temperature and power consumption of the first fan 01, improving the system's efficiency and reliability, thereby ensuring the safe operation of the system.

[0032] Furthermore, in another embodiment of the present invention, as shown in FIG5, the airflow channel 100 further includes a hardware heat dissipation element 71 for controlling the system 70, and an airflow convergence area 80 disposed between the first fan 01 and the second fan 02. The first fan 01 and the second fan 02 simultaneously drive airflow toward the airflow convergence area 80 to reduce the temperature of the hardware heat dissipation element. By having the first fan 01 and the second fan 02 jointly blow the surrounding air toward the airflow convergence area 80, the heat of the heat dissipation element can be carried away, which can effectively reduce the temperature of the hardware heat dissipation element, improve the heat dissipation effect of the system, ensure the normal operation of the hardware components, and increase the reliability of the system.

[0033] Furthermore, in another embodiment of this application, as shown in FIG6, an electrical conversion system 72 is further included to convert AC power into DC power to supply power to the control system 70, the first carbon-free wiping motor 67, and the second carbon-free wiping motor 68. The input terminal of the electrical conversion system 72 is connected to an AC power source 73, the DC power output 723 of the electrical conversion system 72 for the control system is connected to the control system 70, the first DC power output 721 of the electrical conversion system 72 is connected to the first carbon-free wiping motor 67, and the second DC power output 722 of the electrical conversion system 72 is connected to the second carbon-free wiping motor 68. By converting AC power into DC power through the electrical conversion system to supply power to the control system and the carbon-free wiping motors, it is ensured that both fans can operate simultaneously.

[0034] Furthermore, in one embodiment of this application, the upper limit of the AC input voltage range of the power conversion system is less than 300 volts, and the lower limit of the AC input voltage range is greater than 80 volts; the difference between the upper and lower limits exceeds 100 volts; the upper limit of the DC output voltage of the power conversion system is less than 300 volts. By converting different voltage ranges through the power conversion system to simultaneously power two sets of motors, it can adapt to voltage variations in different regions of the world, thereby improving the practicality of the hair dryer of this application.

[0035] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A hair dryer characterized by, The air heating part (06), the first fan (01) and the second fan (02) are arranged in the airflow channel (100), the first fan (01) and the second fan (02) are arranged separately in the airflow channel (100), the first fan (01) is driven by the first motor (65), the second fan (02) is driven by the second motor (66), and the control system controls the first fan (01) and the second fan (02) to rotate simultaneously; the airflow channel (100) further comprises an airflow collection area (80) arranged between the first fan (01) and the second fan (02); the distance (D1) between the first fan (01) and the second fan (02) is at least 10% longer than the radius length (R1) of the first fan.

2. The hair dryer of claim 1, wherein The airflow channel (100) comprises an air inlet (04) and an air outlet (05), the air heating part (06) is arranged between the air outlet (05) and the air inlet (04), the first fan (01) is arranged between the air heating part (06) and the air inlet (04), and the second fan (02) is arranged between the first fan (01) and the air inlet (04); the distance between the first fan (01) and the second fan (02) is at least 10% longer than the radius length (R2) of the second fan; the first fan (01) comprises a first rotating shaft (10) and a first fan edge, and the distance between the axis of the first rotating shaft (10) and the outer edge of the first fan is the radius of the first fan; the second fan (02) comprises a second rotating shaft (20) and a second fan edge, and the distance between the axis of the second rotating shaft and the outer edge of the second fan is the radius of the second fan.

3. The hair dryer of claim 2, wherein, The airflow channel (100) comprises a first end (51) and a second end (52), the air outlet (05) is arranged at the first end (51), the air inlet (04) is arranged at the second end (52), the air heating part (06) is arranged between the first end (51) and the first fan (01), the second fan (02) is arranged between the first fan (01) and the second end (52), the airflow (101) flows from the second fan (02) to the first fan (01), passes through the first fan (01), is accelerated by the first fan (01) and then enters the air heating part (06), and the heated airflow is blown out from the air outlet (05); the air outlet (05) is provided with an ion emitter (101) for emitting negative ions or / and positive ions.

4. The hair dryer of claim 2, wherein, The first rotating shaft (10) and the second rotating shaft (20) are not connected, the first rotating shaft (10) comprises a first proximal end (11) and a first distal end (12), the second rotating shaft (20) comprises a second proximal end (21) and a second distal end (22), the first distal end (12) and the second proximal end (21) are arranged between the first proximal end (11) and the second distal end (22), the distance between the first distal end (12) and the second proximal end (21) is at least ten percent longer than the length of the first radius or / and the second radius, and the first fan (01) and the second fan (02) rotate at different speeds at the same time.

5. The hair dryer of claim 4, wherein, The first rotating shaft (10) and the second rotating shaft (20) are arranged separately on the same axis, the distance between the first distal end (12) and the second proximal end (21) is at least ten percent longer than the length of the first radius or / and the second radius.

6. The hair dryer of claim 2, wherein, The air flow channel (100) comprises a first inner duct (61), the first fan (01) is arranged in the first inner duct (61), and the air flow collecting area (80) is arranged between the first inner duct (61) and the second fan (02); a first air flow flow path (81) and a second air flow flow path (82) are arranged between the air inlet (04) and the air flow collecting area (80); the first air flow flow path (81) extends from the air inlet (04) to the air flow collecting area (80), passes through the second fan (02) and enters the air flow collecting area (80), the second air flow flow path (82) extends from the air inlet (04) to the air flow collecting area (80) without passing through the second fan (02), bypasses the second fan (02) and enters the air flow collecting area (80), and the first air flow flow path (81) and the second air flow flow path (82) meet at the air flow collecting area (80).

7. The hair dryer of claim 6, wherein The first fan (01) and the second fan (02) rotate at different speeds at the same time to drive the first airflow (83) to pass through the first airflow flow path (81), and at the same time to drive the second airflow (84) to pass through the second airflow flow path (82) to converge in the airflow convergence area (80); the first airflow (83) in the first airflow flow path (81) enters the airflow channel (100) from the air inlet (04), passes through the second fan (02), is accelerated by the second fan (02) and enters the airflow convergence area (80) to converge with the second airflow (84); the second airflow (84) in the second airflow flow path (82) enters the airflow channel (100) from the air inlet (04), does not pass through the second fan (02), is driven by the first airflow (83) to enter the airflow convergence area (80) and converges with the first airflow (83).

8. The hair dryer of claim 6, wherein, The airflow channel (100) comprises a second inner duct (62) close to the air inlet (04), the first inner duct (61) and the second inner duct (62) are separately arranged in the airflow channel (100), the second fan (02) is arranged in the second inner duct (62), the first airflow flow path (81) is in the second inner duct (62), passes through the second fan (02) and enters the airflow convergence area (80), and the second airflow flow path (82) is outside the second inner duct (62), bypasses the second fan (02) and the second inner duct (62), enters the airflow convergence area (80) and then enters the first inner duct (61).

9. The hair dryer of claim 8, wherein, The airflow channel (100) comprises an airflow channel outer wall (63) and an airflow heating duct (64), the airflow channel outer wall (63) extends from the first end (51) to the second end (52), connects the air inlet (04) and the air outlet (05), the airflow heating duct (64) is arranged between the air outlet (05) and the first fan (01), and the air heating part (06) is arranged in the airflow heating duct (64); the air inlet (04) comprises a first airflow inlet (41) and a second airflow inlet (42), the first airflow inlet (41) is arranged upstream of the second inner duct (62), and the second airflow inlet (42) is arranged between the airflow channel outer wall (63) and the second inner duct (62).

10. The hair dryer of claim 9, wherein, The first airflow flow path (81) is surrounded by the second airflow flow path (82), the first airflow inlet (41) is surrounded by the second airflow inlet (42) and is separated by the second inner duct (62), and the first inner duct (61) and the second inner duct (62) are arranged in the airflow channel outer wall (63) respectively.

11. A hair dryer according to any preceding claim, wherein The control system controls the first fan (01) and the second fan (02) to rotate at different speeds simultaneously by preset speed combination, the control system includes at least a first preset speed combination and a second preset speed combination; in the first preset speed combination, the speed of the first fan (01) is twice or more than twice the speed of the second fan (02), and the speed of the first fan (01) in the second preset speed combination is higher than that in the first preset speed combination.

12. The hair dryer of claim 9, wherein, The air flow channel (100) includes an air flow adjusting opening (43) and an adjusting air flow flow path (85), the air flow adjusting opening (43) is arranged at the first end (51) and adjacent to the air outlet (05), the adjusting air flow flow path (85) extends between the air flow channel outer wall (63) and the first inner duct (61) from the air flow collection area (80), and extends to the air flow adjusting opening (43) outside the first inner duct (61) and the air flow heating duct (64) and between the air flow channel outer wall (63); the first fan (01) and the second fan (02) rotate simultaneously and drive the air flow in the adjusting air flow flow path (85) to generate adjusting air flow.

13. The hair dryer of claim 12, wherein The first fan (01) and the second fan (02) rotate at different speed combinations and generate adjusting air flow in different directions in the adjusting air flow flow path (85), the adjusting air flow includes a first adjusting air flow (86) and a second adjusting air flow (87), the first adjusting air flow (86) flows from the air flow collection area (80) into the first inner duct (61) and the air flow channel outer wall (63), and then flows into the air flow heating duct (64) and the air flow channel outer wall (63), and flows out at the air flow adjusting opening (43); the second adjusting air flow (87) flows from the air flow adjusting opening (43) into the air flow heating duct (64) and the air flow channel outer wall (63), and then flows into the first inner duct (61) and the air flow channel outer wall (63), and then enters the air flow collection area (80).

14. The hair dryer of claim 13, wherein, When the first fan (01) and the second fan (02) rotate at the first preset speed combination, the first adjusting air flow (86) is generated by driving the air flow in the adjusting air flow flow path (85); when the first fan (01) and the second fan (02) rotate at the second preset speed combination, the second adjusting air flow (87) is generated by driving the air flow in the adjusting air flow flow path (85); when the first adjusting air flow appears, the air flow flow rate of the air outlet (05) increases and the speed decreases; when the second adjusting air flow appears, the air flow speed of the air outlet (05) increases and the flow rate decreases.

15. A hair dryer according to any preceding claim, wherein The first fan (01) or / and the second fan (02) is driven by a carbon-free rubbing motor; the first fan (01) and the second fan (02) rotate at different speeds at the same time, the speed of the first fan (01) is higher than that of the second fan (02); the speed of the first fan (01) and the speed of the second fan (02) are different by more than 10,000 revolutions per minute or / and 10%; when the speed of the first fan (01) is higher than 40,000 revolutions per minute, the speed of the second fan (02) is lower than 30,000 revolutions per minute; when the speed of the first fan (01) is higher than 100,000 revolutions per minute, the speed of the second fan (02) is lower than 90,000 revolutions per minute.

16. The hair dryer of claim 15, wherein, The first fan (01) is driven by a first carbon-free rubbing motor (67), and the second fan (02) is driven by a second carbon-free rubbing motor (68); the first carbon-free rubbing motor is connected with the first inner pipeline (61) in the first inner pipeline (61) through a guide vane (69); the first inner pipeline (61) is heated by the first carbon-free rubbing motor (67), and the airflow driven by the second fan (02) blows to the first inner pipeline (61) to reduce the temperature of the first inner pipeline (61), so that the surface temperature of the first inner pipeline (61) is lower than 100 degrees; the airflow driven by the second fan (02) flows to the first fan (01) to reduce the power consumption of the rubbing motor rotating the first fan (01).

17. A hair dryer according to any preceding claim, wherein The airflow channel (100) further comprises a hardware heat dissipation element (71) for a control system (70), which is arranged in an airflow collection area (80) between the first fan (01) and the second fan (02), and the first fan (01) and the second fan (02) simultaneously drive airflow to blow to the airflow collection area (80) to reduce the temperature of the hardware heat dissipation element.

18. A hair dryer according to any preceding claim, wherein It also includes an electric conversion system (72) for converting alternating current into direct current to power the control system (70), the first carbon-free rubbing motor (67) and the second carbon-free rubbing motor (68); the input end of the electric conversion system (72) is connected with an alternating current power supply (73), the direct current output (723) of the control system of the electric conversion system (72) is connected with the control system (70), the first direct current output (721) of the electric conversion system (72) is connected with the first carbon-free rubbing motor (67), and the second direct current output (722) of the electric conversion system (72) is connected with the second carbon-free rubbing motor (68).

19. The hair dryer of claim 18, wherein, The upper limit of the alternating current input voltage range of the electric conversion system is lower than 300 volts, and the lower limit of the alternating current input voltage range is higher than 80 volts; the difference between the upper limit and the lower limit is more than 100 volts; the upper limit of the direct current output voltage of the electric conversion system is lower than 300 volts.

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