Dual-motor hair dryer

Abstract

This invention discloses a dual-motor hair dryer, relating to the field of hair dryer technology. It includes a housing, a handle, and a mounting cover installed inside the housing. It also includes a dual-system blowing assembly, a drive assembly, a first adjustment assembly, and a second adjustment assembly located inside the mounting cover. In use, the right-side main motor fan system, through the cooperation of the air guide tube, main air duct, and inner air duct, delivers gas to the inner cylinder, evenly passing through the heating element. Simultaneously, the left-side auxiliary motor fan system delivers gas to the outer air duct through the air guide tube, auxiliary air duct, and flow equalization pipe. The gas flows through the annular air cavity, forming an annular air curtain that surrounds the hot air along the central axis. The annular cold air curtain and the hot air along the central axis are coaxially superimposed. Furthermore, the main and auxiliary air ducts are isolated, ensuring that the high temperature of the main air duct does not affect the auxiliary motor, resulting in high operating efficiency for the auxiliary motor. The main motor also experiences stable load due to the smooth air duct, significantly improving the overall energy efficiency and further achieving energy savings.

Description

Technical Field

[0001] This invention relates to the field of hair dryer technology, specifically a dual-motor hair dryer. Background Technology

[0002] Hair dryers are common handheld household appliances. They use an electric motor to drive a fan, generating airflow that is then heated by an internal heating element to quickly dry wet hair. They can also be used for hair styling and are widely used in homes and hair salons. Dual-motor hair dryers incorporate two independent motors and a fan system. Through the coordinated operation of the two motors, they create a dual-channel airflow output, offering advantages in air volume, wind speed, and temperature control. In existing technology, a dual-motor blower has two motors working together. Air is drawn in through the air inlet, pressurized by the two motors, and then flows to the heating cylinder for heating. However, during the process of the two airflows converging into the heating cylinder, due to the inconsistency in the direction, speed, and pressure of the two airflows, they are prone to colliding and forming vortices when they merge. This results in the actual airflow being much less than the theoretical airflow. In order to achieve the target airflow, the dual motors need to be compensated at a higher speed, which further increases energy consumption. In addition, when all the airflow enters the heating zone at the same time, the high-temperature air will flow back into the motor cavity, which will cause the motor temperature to rise, the resistance to increase, and the efficiency to continue to decline.

[0003] Therefore, we propose a dual-motor blower to address the problems mentioned in the background section. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-motor hair dryer to solve the problems mentioned in the background art, such as the two airflows easily colliding with each other and forming eddies during the operation of the dual-motor hair dryer, resulting in a small actual air volume, the need for higher speed compensation of the dual motors, which increases energy consumption, and the fact that all airflows enter the heating zone at the same time, causing high-temperature air to flow back into the motor cavity, which in turn leads to an increase in motor temperature and a continuous decrease in efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A dual-motor hair dryer includes a housing, a handle, and a mounting cover installed inside the housing, and further includes a dual-system blowing assembly, a drive assembly, a first adjustment assembly, and a second adjustment assembly located inside the mounting cover; The dual-system blowing assembly is used to output main central hot air and secondary annular air curtain; The driving component is used to drive the first adjustment component and the second adjustment component to move; The first adjustment component is located at the top of the dual-system blowing assembly and is used to adjust the wind speed of the secondary annular air curtain; The second adjustment component is located on the top surface of the inner wall of the dual-system blowing assembly, and it is used to adjust the wind speed of the main central hot air. The dual-system air blowing assembly includes an inner cylinder, two motor fan systems, an outer air duct, an inner air duct, and a flow guide. The inner wall of the inner cylinder has an annular air cavity, and several air holes are opened at the top edge of the inner cylinder. The top of each of the two motor fan systems is fixedly installed with a flow guide. The top of one of the flow guides is fixedly connected to a main air duct, and the top of the other flow guide is fixedly connected to a secondary air duct. One end of the secondary air duct is fixedly connected to a flow equalization pipe.

[0006] Preferably, a heating element is provided inside the inner cylinder, the tops of the outer and inner air ducts are fixedly connected to the bottom of the inner cylinder, one end of the main air duct is fixedly connected through the outer air duct and to the bottom of the inner air duct, the main air duct, the inner air duct and the inner cylinder are connected to form an axial air duct for the main motor, both ends of the flow equalization pipe are fixedly connected to the bottom of the outer air duct, and the auxiliary air duct, the flow equalization pipe, the outer air duct and the annular air cavity are connected to form an annular air duct for the auxiliary motor.

[0007] Preferably, the flow guide includes a gradually expanding flow guide shroud, the outer surface of which is provided with a plurality of flow guide grooves at equal intervals, a central hole is provided at the center of the bottom of the gradually expanding flow guide shroud, a water droplet guide is installed inside the gradually expanding flow guide shroud by an auxiliary rod, and three fixing rods are fixedly installed on the outer surface of the gradually expanding flow guide shroud, and the bottom ends of the three fixing rods are all fixedly installed on the bottom surface inside the inner air duct.

[0008] Preferably, the first adjusting component includes an annular plate, the top of which is provided with a plurality of arc-shaped grooves at equal intervals, and an L-shaped push rod is movably embedded in the interior of each arc-shaped groove. An adjusting plate is fixedly installed at one end of the L-shaped push rod, the top of which is provided with an eccentric cavity, and a sealing gasket is fixedly connected to the bottom of which is located. The adjusting plate is located at the top of the inner cylinder near the air hole, and the bottom of the sealing gasket is in contact with the top of the inner cylinder.

[0009] Preferably, a Y-shaped rod is fixedly installed at the top edge of the adjusting plate, and a double-headed limiting rod is fixedly installed at one end of the Y-shaped rod. Both ends of the double-headed limiting rod are movably fitted with movable wheels.

[0010] Preferably, the other end of the L-shaped push rod is movably fitted with a roller, the outer surface of the roller is movably embedded in the inside of the arc-shaped groove, and two limiting grooves are opened on one side of the outer surface of the adjusting plate. A support rod is movably embedded in the inside of each of the two limiting grooves, and one end of each of the two support rods is fixedly installed at the top of the outer surface of the inner cylinder.

[0011] Preferably, the outer surfaces of the two support rods are movably fitted with limiting rings, the tops of the two limiting rings are fixedly installed with limiting plates, the bottoms of the two limiting plates are fixedly installed on the top of the adjusting plate, and a plurality of limiting seats are equidistantly installed on the top of the inner cylinder, with both ends of the adjusting plate movably embedded inside the limiting seats.

[0012] Preferably, the annular plate is movably fitted onto the outer surface of the inner cylinder, and a number of support blocks are fixedly installed at the top of the outer surface of the inner cylinder. A number of rotating grooves are opened on the outer surface of the annular plate, and the top of each support block is movably embedded in the interior of the rotating groove.

[0013] Preferably, the second adjustment component includes several elastic flaps and several elastic connectors. The outer surfaces of the two sides of the elastic connectors are fixedly connected to the opposite sides of two adjacent elastic flaps. Two fixing plates are fixedly installed on the outer surface of each elastic flap. The outer surfaces of the two movable wheels are movably embedded in the two fixing plates, and the outer surfaces of the movable wheels are in contact with the outer surfaces of the elastic flaps. The outer surfaces of the bottom of the elastic flaps and the elastic connectors are fixedly connected to the top surface of the inner wall of the inner cylinder.

[0014] Preferably, the drive assembly includes a micro motor, a gear is fixedly mounted on the output end of the micro motor, an arc-shaped toothed plate is meshed with the outer surface of the gear, the outer surface of the arc-shaped toothed plate is fixedly connected to the outer surface of the annular plate, and the bottom of the micro motor is mounted on the outer surface of the inner cylinder through an auxiliary frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In use, the present invention features two independent motor fan systems within the blower. The main motor fan system on the right, through the air guide tube, main air duct, and inner air duct, delivers gas to the inner cylinder, ensuring it passes evenly through the heating element. Simultaneously, the auxiliary motor fan system on the left delivers gas to the outer air duct through the air guide tube, auxiliary air duct, and flow equalization pipe. The airflow passes through the annular air chamber, forming an annular air curtain that surrounds the hot air along the central axis. The airflow does not pass through the heating element throughout, preventing hot air backflow. The annular cold air curtain and the hot air along the central axis are coaxially superimposed, working together to optimize the airflow pattern, resulting in more uniform and gentle airflow. Furthermore, the main and auxiliary air ducts are isolated, ensuring that the high temperature of the main air duct does not affect the auxiliary motor, which operates efficiently at room temperature. Due to the smooth airflow and stable load, the main motor operates within its high-efficiency range for extended periods, significantly improving the overall energy efficiency and further achieving energy savings.

[0016] 2. When this invention is used, the outer annular air curtain forms a dynamic heat insulation layer, which blocks the heat conduction of the heating element to the outside, improves heating efficiency, reduces heating power requirements, and the annular air curtain can also provide active cooling for the inner cylinder to prevent it from overheating, reduce the frequency of overheat protection triggering, and thus avoid the energy consumption impact caused by frequent power outages and restarts.

[0017] 3. When using this invention, the driving component drives the annular plate to rotate, and the L-shaped push rod drives the adjusting plate to move, adjusting the overlapping area between the eccentric cavity and the air hole, thereby adjusting the size of the air outlet of the annular air curtain and realizing the adjustment of the wind speed of the annular cold air curtain.

[0018] 4. When the present invention is used, the movement of the first adjustment component synchronously drives the second adjustment component to close or open, thereby adjusting the size of the central hot air outlet and realizing the adjustment of the hot air speed.

[0019] 5. When using this invention, the hot air and cold air speeds are increased in tandem to form a high-speed composite airflow with concentrated energy. At this time, the wind speed is high, the penetration is strong, and the hair dries the fastest. The motor can achieve a high wind speed without increasing its speed, which is more energy-efficient. When the wind speeds of the two are decreased in tandem, the air volume is large and the temperature is mild. It will not impact the hair and the hair cuticles are not easy to open, thus achieving low temperature and low wind speed hair care. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the dual-motor blower of the present invention; Figure 2 This is a schematic diagram of the internal structure of the dual-motor blower of the present invention; Figure 3 This is a schematic diagram of the mounting cover in the dual-motor blower of the present invention; Figure 4 This is a schematic diagram of the dual-system blowing assembly in the dual-motor blower of the present invention; Figure 5 This is a cross-sectional view of the inner cylinder in the dual-motor blower of the present invention; Figure 6 This is a cross-sectional schematic diagram of the flow guide component in the dual-motor blower of the present invention; Figure 7 This is a schematic diagram of the drive assembly in the dual-motor blower of the present invention; Figure 8 This is a cross-sectional schematic diagram of the structure of the first adjustment component in the dual-motor blower of the present invention; Figure 9 This is a cross-sectional schematic diagram of the structure of the second adjustment component in the dual-motor blower of the present invention; Figure 10 This is a cross-sectional view of the adjusting plate in the dual-motor blower of the present invention; Figure 11 This is a schematic diagram of the flow paths of the two airflow streams in the dual-system blowing assembly of the dual-motor blower of the present invention.

[0021] In the picture: 1. Outer shell; 2. Handle; 3. Mounting cover; 4. Dual-system blower assembly; 401. Inner cylinder; 402. Motor fan system; 403. Heating element; 404. Annular air cavity; 405. Outer air duct; 406. Inner air duct; 407. Air guide; 4071. Gradually expanding air guide cover; 4072. Air guide groove; 4073. Center hole; 4074. Water droplet air guide; 4075. Fixing rod; 408. Air guide tube; 409. Main air duct; 410. Secondary air duct; 411. Flow equalization pipe; 412. Air hole; 5. Drive assembly; 501. Micro motor; 502. 503. Gear; 6. Arc-shaped toothed plate; 7. First adjusting assembly; 601. Annular plate; 602. Arc-shaped groove; 603. L-shaped push rod; 604. Adjusting plate; 605. Roller; 606. Sealing gasket; 607. Limiting groove; 608. Support rod; 609. Limiting ring; 610. Limiting plate; 611. Limiting seat; 612. Support block; 613. Rotary groove; 614. Eccentric cavity; 615. Y-shaped rod; 616. Double-headed limiting rod; 617. Movable wheel; 7. Second adjusting assembly; 701. Elastic flap; 702. Elastic connector; 703. Fixing plate. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-11 As shown, the present invention provides a technical solution: The dual-motor hair dryer includes a housing 1, a handle 2, and a mounting cover 3 installed inside the housing 1. It also includes a dual-system blowing assembly 4, a drive assembly 5, a first adjustment assembly 6, and a second adjustment assembly 7 located inside the mounting cover 3. Dual-system air blowing assembly 4 is used to output the main central hot air and the secondary annular air curtain; Drive component 5 is used to drive the first adjustment component 6 and the second adjustment component 7 to move; The first adjustment component 6 is located on top of the dual-system blowing component 4 and is used to adjust the wind speed of the secondary annular air curtain. The second adjustment component 7 is located on the top surface of the inner wall of the dual-system blowing component 4, and it is used to adjust the wind speed of the main central hot air. The dual-system blower assembly 4 includes an inner cylinder 401, two motor fan systems 402, an outer air duct 405, an inner air duct 406, and a guide 407. The inner wall of the inner cylinder 401 has an annular air cavity 404, and several air holes 412 are opened at the top edge of the inner cylinder 401. The top of each of the two motor fan systems 402 is fixedly installed with an air guide duct 408. The top of one air guide duct 408 is fixedly connected to a main air duct 409, and the top of the other air guide duct 408 is fixedly connected to a secondary air duct 410. One end of the secondary air duct 410 is fixedly connected to a flow equalization pipe 411.

[0024] A heating element 403 is installed inside the inner cylinder 401. The tops of the outer air duct 405 and the inner air duct 406 are fixedly connected to the bottom of the inner cylinder 401. One end of the main air duct 409 is fixedly inserted through the outer air duct 406 and fixedly connected to the bottom of the inner air duct 406. The main air duct 409, the inner air duct 406 and the inner cylinder 401 are connected to form the axial air duct of the main motor. Both ends of the flow equalization pipe 411 are fixedly connected to the bottom of the outer air duct 405. The auxiliary air duct 410, the flow equalization pipe 411, the outer air duct 405 and the annular air cavity 404 are connected to form the annular air duct of the auxiliary motor.

[0025] In practical applications, the adjusting plate 604 and the elastic flap 701 are positioned opposite each other, and the number of adjusting plates 604 matches the number of elastic flaps 701. Several adjusting plates 604 are installed on the top of the inner cylinder 401, and several elastic flaps 701 are connected to the top surface of the inner wall of the inner cylinder 401. Elastic connectors 702 connect adjacent elastic flaps 701, forming a flexible conical air-regulating structure that can be closed and opened, thereby adjusting the wind speed of the hot air in the axial air duct of the main motor. The adjusting plate 604 covers the air hole 412, and by adjusting the overlapping area of ​​the eccentric cavity 614 and the air hole 412, the wind speed of the normal temperature air in the annular air duct of the auxiliary motor is adjusted. A dual-system blowing assembly 4 is installed in the blower, such as... Figure 5As shown, the right-side main motor fan system 402 is connected to the inner air duct 406 and the central heating zone inside the inner cylinder 401 via the main air duct 409, forming an axial air duct for the main motor. After the right-side main motor fan system 402 is started, a large amount of air is drawn in through the air inlet, and then the corresponding air guide duct 408 and main air duct 409 transport the gas to the inner air duct 406, and then into the inner cylinder 401. At this time, the airflow in the main air duct passes through the heating element 403 axially. The axial air duct has low wind resistance and smooth flow, and the heat exchange efficiency is higher than that of the turbulent air duct, reducing motor load fluctuation and reducing total energy consumption. The left-side auxiliary motor fan system 402 is connected to the auxiliary air duct 410, the flow equalization pipe 411, the outer air duct 405 and the annular air cavity 404, forming an axial air duct for the main motor. The auxiliary motor is connected to an annular air duct. When the auxiliary motor fan system 402 on the left is started, air is delivered to the outer air duct 405 through the air guide duct 408, the auxiliary air duct 410, and the flow equalization pipe 411. Then it flows into the annular air cavity 404, forming an annular air curtain that wraps around the hot air in the central axis. The airflow does not pass through the heating element 403 throughout the entire process, avoiding hot air backflow and causing the auxiliary motor temperature to rise. In addition, the annular air curtain (which is a normal temperature airflow) also forms a dynamic heat insulation layer, blocking the heat conduction from the heating element 403 to the outside, improving heating efficiency, reducing heating power requirements, and the annular air curtain can also provide active cooling for the inner cylinder 401 to prevent it from overheating and reduce the frequency of overheat protection triggering, thereby avoiding the energy consumption impact caused by frequent power outages and restarts.

[0026] Furthermore, the outer annular air curtain is blown out by multiple air holes 412, forming a uniform annular cold air curtain, which is coaxially superimposed with the central axial hot air. The two work together to optimize the air outlet pattern, and the combined cold and hot air outlet results in a more uniform and gentle temperature, shortens the drying time, and reduces overall energy consumption. The main and auxiliary air ducts are isolated. The high temperature of the main air duct will not affect the auxiliary motor, and the auxiliary motor operates at high efficiency at room temperature. Due to the smooth air duct and stable load, the main motor operates in the high-efficiency range for a long time, which greatly improves the overall energy efficiency and further realizes energy saving. This solves the problem that during the operation of the dual-motor blower, the two airflows are prone to collision and vortex formation, resulting in a small actual air volume. The dual motors need to have higher speeds to compensate, which increases energy consumption. In addition, when all the airflow enters the heating zone at the same time, the high-temperature air will flow back into the motor cavity, which will cause the motor temperature to rise and the efficiency to continue to decline.

[0027] See Figures 5-6 As shown, the flow guide 407 includes a gradually expanding flow guide shroud 4071. Several flow guide grooves 4072 are equidistantly opened on the outer surface of the gradually expanding flow guide shroud 4071. A central hole 4073 is opened at the center of the bottom of the gradually expanding flow guide shroud 4071. A water droplet guide 4074 is installed inside the gradually expanding flow guide shroud 4071 through an auxiliary rod. Three fixing rods 4075 are fixedly installed on the outer surface of the gradually expanding flow guide shroud 4071, and the bottom ends of the three fixing rods 4075 are all fixedly installed on the bottom surface inside the inner air duct 405.

[0028] It should also be noted that the guide element 407 is installed at the center of the bottom surface inside the inner air duct 406. After the airflow in the main air duct 409 enters the inner air duct 406, some of the gas diffuses evenly in all directions under the guidance of the gradually expanding guide shroud 4071 and the guide groove 4072, while some of the gas flows upward through the central hole 4073 and, under the guidance of the water droplet guide 4074, flows upward along the outer surface of the water droplet guide 4074. The flow path of the airflow in the main air duct is as follows: Figure 11 As shown in line b, the airflow in the main duct flows upward evenly for heating, enhancing the heat exchange effect, reducing heating power, and achieving energy saving.

[0029] See Figures 7-10 As shown, the first adjustment component 6 includes an annular plate 601. Several arc-shaped grooves 602 are equidistantly provided on the top of the annular plate 601. An L-shaped push rod 603 is movably embedded inside each arc-shaped groove 602. An adjustment plate 604 is fixedly installed at one end of the L-shaped push rod 603. An eccentric cavity 614 is provided on the top of the adjustment plate 604. A sealing gasket 606 is fixedly connected to the bottom of the adjustment plate 604. The adjustment plate 604 is located at the top of the inner cylinder 401 near the air hole 412. The bottom of the sealing gasket 606 is in contact with the top of the inner cylinder 401.

[0030] It should also be noted that a sealing gasket 606 is installed between the adjusting plate 604 and the top of the inner cylinder 401 for sealing, facilitating the subsequent guidance of the annular air curtain of the secondary air duct to be concentrated and blown out through the eccentric cavity 614. The eccentric cavity 614 and the air hole 412 are staggered in position, and the middle part of the space is connected, such as... Figure 10 As shown. Driven by the drive assembly 5, the annular plate 601 rotates counterclockwise. The roller 605 at one end of the L-shaped push rod 603 rolls inside the arc groove 602 and is pushed by the arc groove 602 to move towards the inner cylinder 401, pushing the L-shaped push rod 603 to move. This, in turn, pushes the adjusting plate 604 to move towards the second adjusting assembly 7, reducing the overlapping area between the eccentric cavity 614 and the air hole 412, thereby reducing the air outlet of the annular air curtain and increasing the wind speed of the annular cold air curtain. The high-speed annular wind will wrap around and constrain the central hot air, preventing it from spreading, which is beneficial to improving the drying speed. Furthermore, when the drive assembly 5 drives the annular plate 601 to rotate clockwise, the L-shaped push rod 603 drives the adjusting plate 604 to move in the opposite direction, expanding the overlapping area between the eccentric cavity 614 and the air hole 412, thereby increasing the air outlet of the cold air curtain and reducing the wind speed, which is suitable for low wind speed hair care.

[0031] See Figures 9-10 As shown, a Y-shaped rod 615 is fixedly installed at the top edge of the adjusting plate 604. A double-headed limiting rod 616 is fixedly installed at one end of the Y-shaped rod 615. Both ends of the double-headed limiting rod 616 are movably fitted with movable wheels 617.

[0032] It should also be noted that the adjustment plate 604 drives the Y-shaped rod 615 to move together, which in turn drives the double-headed limit rod 616 and the movable wheel 617 to move together, so as to simultaneously realize the closing and opening of the air outlet of the second adjustment component 7, thereby adjusting the wind speed of the hot air in the main air duct.

[0033] See Figures 9-10 As shown, the other end of the L-shaped push rod 603 is movably fitted with a roller 605. The outer surface of the roller 605 is movably embedded in the interior of the arc-shaped groove 602. Two limiting grooves 607 are opened on one side of the outer surface of the adjusting plate 604. Support rods 608 are movably embedded in the interior of both limiting grooves 607. One end of each support rod 608 is fixedly installed at the top of the outer surface of the inner cylinder 401.

[0034] It should also be noted that a roller 605 is provided between the L-shaped push rod 603 and the arc-shaped groove 602 for easy rolling. Under the action of the arc-shaped groove 602, the roller 605 rolls and moves, better driving the L-shaped push rod 603 to move, thereby realizing the movement of the adjusting plate 604. When the adjusting plate 604 moves, the limiting groove 607 slides on the outer surface of the support rod 608, limiting the adjusting plate 604 through the support rod 608.

[0035] See Figures 7-10 As shown, the outer surfaces of the two support rods 608 are movably fitted with limiting rings 609, the tops of the two limiting rings 609 are fixedly installed with limiting plates 610, the bottoms of the two limiting plates 610 are fixedly installed on the top of the adjusting plate 604, and a number of limiting seats 611 are equidistantly installed on the top of the inner cylinder 401. Both ends of the adjusting plate 604 are movably embedded in the inside of the limiting seats 611.

[0036] It should also be noted that during the movement of the adjusting plate 604, the limiting plate 610 drives the limiting ring 609 to slide on the outer surface of the support rod 608. This prevents the limiting groove 607 from sliding out of the outer surface of the support rod 608 when the adjusting plate 604 moves towards the second adjusting assembly 7, thus preventing it from affecting the subsequent reverse movement of the adjusting plate 604. Limiting seats 611 are provided at both ends of the adjusting plate 604 to limit its movement, ensuring it fits tightly against the top of the inner cylinder 401.

[0037] See Figures 7-9 As shown, the annular plate 601 is movably sleeved on the outer surface of the inner cylinder 401. Several support blocks 612 are fixedly installed at the top of the outer surface of the inner cylinder 401. Several rotating grooves 613 are opened on the outer surface of the annular plate 601. The top of each support block 612 is movably embedded in the interior of the rotating groove 613.

[0038] It should also be noted that the annular plate 601 is supported by the support block 612, and the top of the support block 612 is embedded in the rotating groove 613 to facilitate the forward and reverse rotation of the annular plate 601.

[0039] See Figures 7-10 As shown, the second adjustment component 7 includes several elastic flaps 701 and several elastic connectors 702. The outer surfaces of the two sides of the elastic connectors 702 are fixedly connected to the opposite side of two adjacent elastic flaps 701. Two fixing plates 703 are fixedly installed on the outer surface of each elastic flap 701. The outer surfaces of two movable wheels 617 are movably embedded in the two fixing plates 703, and the outer surfaces of the movable wheels 617 are in contact with the outer surfaces of the elastic flaps 701. The outer surfaces of the bottom of the elastic flaps 701 and the elastic connectors 702 are fixedly connected to the top surface of the inner wall of the inner cylinder 401.

[0040] It should also be noted that the bottom of the second adjusting component 7 is fixed to the top surface of the inner wall of the inner cylinder 401. The movable wheel 617 is embedded inside the fixed plate 703 and makes movable contact with the elastic flap 701. By moving the Y-shaped rod 615, the double-headed limiting rod 616 can be pushed to move, causing the movable wheel 617 to roll and move on the outer surface of the elastic flap 701, generating a thrust on the elastic flap 701, causing it to close in the middle, reducing the hot air outlet and increasing the hot air velocity. When the Y-shaped rod 615 drives the double-headed limiting rod 616 and the movable wheel 617 to move in opposite directions, the movable wheel 617 rolls and moves while generating a pulling force on the fixed plate 703, causing the elastic flap 701 to open, increasing the hot air outlet and reducing the wind speed. The elastic connector 702 is made of food-grade high-temperature fluorosilicone material, which can fully withstand the hot air temperature of the main air duct, without aging or deformation; it has excellent elasticity and can compensate for the gap changes when the elastic flap 701 closes and expands. The elastic flap 701 is made of thin-walled metal elastic alloy, which has good elasticity and is not affected by high temperature.

[0041] Furthermore, with the coordinated operation of the drive component 5, the first adjustment component 6, and the second adjustment component 7, the hot air speed and the annular air curtain speed are synchronously adjusted. When the speeds of both are increased synchronously, a high-speed composite airflow is formed, which results in high air speed, strong penetration, and the fastest hair drying. The motor can achieve a high air speed without increasing its speed, making it more energy-efficient. When the speeds of both are decreased synchronously, the air volume is large and the temperature is gentle, which will not impact the hair and the hair cuticles are not easily opened, thus achieving low-temperature and low-speed hair care.

[0042] See Figures 7-8 As shown, the drive assembly 5 includes a micro motor 501, a gear 502 is fixedly mounted on the output end of the micro motor 501, an arc-shaped toothed plate 503 is meshed with the outer surface of the gear 502, the outer surface of the arc-shaped toothed plate 503 is fixedly connected to the outer surface of the annular plate 601, and the bottom of the micro motor 501 is mounted on the outer surface of the inner cylinder 401 through an auxiliary frame.

[0043] It should also be noted that the micro motor 501 is a 24BYJ48 micro geared stepper motor, which drives the gear 502 to rotate in both directions, thereby driving the arc-shaped toothed plate 503 to rotate in both directions, and in turn driving the ring plate 601 to rotate clockwise and counterclockwise.

[0044] Please see Figures 1-11 As shown, the overall effect and working principle of the mechanism are as follows: the right main motor fan system 402 is started, and the corresponding air guide duct 408 and main air duct 409 transport the gas to the inner air duct 406, and then enter the inner cylinder 401. After passing through the flow guide 407, the airflow passes evenly through the heating element 403. At the same time, the left auxiliary motor fan system 402 transports the gas air to the air guide duct 408, auxiliary air duct 410, flow equalization pipe 411 and outer air duct 405, and then flows into the annular air cavity 404 to form an annular air curtain. The micro motor 501 drives the gear 502 to rotate, causing the arc-shaped toothed plate 503 to rotate counterclockwise, which in turn causes the annular plate 601 to rotate counterclockwise. The L-shaped push rod 603 pushes the adjusting plate 604 to move, and with the cooperation of the Y-shaped rod 615 and the double-headed limiting rod 616, it pushes the movable wheel 617 to move together, which in turn pushes the elastic flap 701 to close, thereby adjusting the air outlet 412 and the air outlet of the inner cylinder 401, and thus increasing the wind speed of the hot air and the annular air. The micro motor 501 drives the gear 502 to rotate in the opposite direction, causing the arc-shaped toothed plate 503 to rotate clockwise, which in turn causes the annular plate 601 to rotate clockwise. At this time, the L-shaped push rod 603 drives the adjusting plate 604 to move in the opposite direction, and the Y-shaped rod 615 and the double-headed limiting rod 616 drive the movable wheel 617 to move in the opposite direction, thereby pulling the elastic flap 701 to open, increasing the air volume of the air outlet 412 and the air outlet of the inner cylinder 401, and thus reducing the wind speed of the hot air and the annular air.

[0045] Among them, the motor fan system 402, the heating element 403 and the micro motor 501 are all existing technologies, and their components and operating principles are all publicly available technologies, so they will not be explained in detail here.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Dual motor hair dryer comprising a casing (1), a handle (2) and a mounting cover (3) mounted inside the casing (1), characterized in that: Also includes: The dual-system air blowing assembly (4), drive assembly (5), first adjustment assembly (6), and second adjustment assembly (7) are located inside the mounting cover (3); The dual-system blowing assembly (4) is used to output the main central hot air and the secondary annular air curtain; The drive component (5) is used to drive the first adjustment component (6) and the second adjustment component (7) to move; The first adjustment component (6) is located on top of the dual-system blowing assembly (4) and is used to adjust the wind speed of the sub-annular air curtain; The second adjustment component (7) is located on the top surface of the inner wall of the dual-system blowing component (4), and it is used to adjust the wind speed of the main central hot air; The dual-system blower assembly (4) includes an inner cylinder (401), two motor fan systems (402), an outer air duct (405), an inner air duct (406), and a guide (407). The inner wall of the inner cylinder (401) is provided with an annular air cavity (404). Several air holes (412) are provided at the edge of the top of the inner cylinder (401). The top of each of the two motor fan systems (402) is fixedly installed with an air guide (408). The top of one of the air guides (408) is fixedly connected to a main air duct (409), and the top of the other air guide (408) is fixedly connected to a secondary air duct (410). One end of the secondary air duct (410) is fixedly connected to a flow equalization pipe (411).

2. The dual-motor blow dryer of claim 1, wherein: The inner cylinder (401) is equipped with a heating element (403). The tops of the outer air duct (405) and the inner air duct (406) are fixedly connected to the bottom of the inner cylinder (401). One end of the main air duct (409) is fixedly connected through the outer air duct (406) and to the bottom of the inner air duct (406). The main air duct (409), the inner air duct (406) and the inner cylinder (401) are connected to form the main motor axial air duct. Both ends of the flow equalization pipe (411) are fixedly connected to the bottom of the outer air duct (405). The auxiliary air duct (410), the flow equalization pipe (411), the outer air duct (405) and the annular air cavity (404) are connected to form the auxiliary motor annular air duct.

3. The dual-motor hair dryer according to claim 2, characterized in that: The flow guide (407) includes a gradually expanding flow guide shroud (4071), and a plurality of flow guide grooves (4072) are equidistantly opened on the outer surface of the gradually expanding flow guide shroud (4071). A central hole (4073) is opened at the center of the bottom of the gradually expanding flow guide shroud (4071). A water droplet guide (4074) is installed inside the gradually expanding flow guide shroud (4071) through an auxiliary rod. Three fixing rods (4075) are fixedly installed on the outer surface of the gradually expanding flow guide shroud (4071), and the bottom ends of the three fixing rods (4075) are all fixedly installed on the bottom surface inside the inner air duct (405).

4. The dual-motor hair dryer according to claim 3, characterized in that: The first adjustment component (6) includes an annular plate (601). The top of the annular plate (601) is provided with several arc-shaped grooves (602) at equal intervals. Each arc-shaped groove (602) is movably embedded with an L-shaped push rod (603). One end of the L-shaped push rod (603) is fixedly installed with an adjustment plate (604). The top of the adjustment plate (604) is provided with an eccentric cavity (614). The bottom of the adjustment plate (604) is fixedly connected with a sealing gasket (606). The adjustment plate (604) is located at the top of the inner cylinder (401) near the air hole (412). The bottom of the sealing gasket (606) is in contact with the top of the inner cylinder (401).

5. The dual-motor hair dryer according to claim 4, characterized in that: A Y-shaped rod (615) is fixedly installed at the top edge of the adjusting plate (604). A double-headed limiting rod (616) is fixedly installed at one end of the Y-shaped rod (615). Both ends of the double-headed limiting rod (616) are movably fitted with movable wheels (617).

6. The dual-motor hair dryer according to claim 5, characterized in that: The other end of the L-shaped push rod (603) is movably fitted with a roller (605). The outer surface of the roller (605) is movably embedded in the interior of the arc-shaped groove (602). Two limiting grooves (607) are opened on one side of the outer surface of the adjusting plate (604). Support rods (608) are movably embedded in the interior of the two limiting grooves (607). One end of each of the two support rods (608) is fixedly installed at the top of the outer surface of the inner cylinder (401).

7. The dual-motor hair dryer according to claim 6, characterized in that: The outer surfaces of the two support rods (608) are movably fitted with limiting rings (609), the tops of the two limiting rings (609) are fixedly installed with limiting plates (610), the bottoms of the two limiting plates (610) are fixedly installed on the top of the adjusting plate (604), and a number of limiting seats (611) are equidistantly installed on the top of the inner cylinder (401). Both ends of the adjusting plate (604) are movably embedded in the limiting seats (611).

8. The dual-motor hair dryer according to claim 7, characterized in that: The annular plate (601) is movably sleeved on the outer surface of the inner cylinder (401). Several support blocks (612) are fixedly installed at the top of the outer surface of the inner cylinder (401). Several rotating grooves (613) are opened on the outer surface of the annular plate (601). The top of each support block (612) is movably embedded in the interior of the rotating groove (613).

9. The dual-motor hair dryer according to claim 8, characterized in that: The second adjustment component (7) includes several elastic flaps (701) and several elastic connectors (702). The outer surfaces of the two sides of the elastic connectors (702) are fixedly connected to the opposite side of two adjacent elastic flaps (701). Two fixing plates (703) are fixedly installed on the outer surface of each elastic flap (701). The outer surfaces of the two movable wheels (617) are movably embedded in the two fixing plates (703), and the outer surfaces of the movable wheels (617) are in contact with the outer surfaces of the elastic flaps (701). The outer surfaces of the bottom of the elastic flaps (701) and the elastic connectors (702) are fixedly connected to the top surface of the inner wall of the inner cylinder (401).

10. The dual-motor hair dryer according to claim 9, characterized in that: The drive assembly (5) includes a micro motor (501), a gear (502) is fixedly installed at the output end of the micro motor (501), an arc-shaped toothed plate (503) is meshed on the outer surface of the gear (502), the outer surface of the arc-shaped toothed plate (503) is fixedly connected to the outer surface of the annular plate (601), and the bottom of the micro motor (501) is installed on the outer surface of the inner cylinder (401) through an auxiliary frame.

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