Heat dissipation system of hair dryer

Abstract

This application provides a heat dissipation system of a hair dryer, including a housing, a barrel, a fan assembly, and a handle. The handle is provided with a first air inlet, and the barrel is provided with a second air inlet, a first air outlet, a second air outlet, and a third air outlet. A first airflow is formed at the first air inlet, and a second airflow and a third airflow are formed at the second air inlet. The first airflow sequentially flows through an interior of the handle, a space between the housing and the barrel, and the first air outlet, the second airflow sequentially flows through a space between the fan assembly and the barrel, and the second air outlet, and the third airflow sequentially flows through an interior of the fan assembly and the third air outlet. The structure improves heat dissipation of the hair dryer.

Description

RELATED APPLICATIONS

[0001] The present patent document claims the benefit of priority to Patent Application No. 202411950304.4, filed Dec. 26, 2024, and entitled “HEAT DISSIPATION SYSTEM OF HAIR DRYER,” the entire contents of each of which are incorporated herein by reference.BACKGROUND1. Technical Field

[0002] This application relates to the field of hair dryers, and in particular to a heat dissipation system of a hair dryer.2. Background Information

[0003] A high-speed hair dryer uses a high-performance motor to generate high-speed airflow, effectively reducing the time required to dry hair. However, in previous high-speed hair dryers, the fan assembly is arranged at the handle, with the air outlet in the barrel, requiring the airflow to bend at 90 degrees, which easily leads to airflow loss.

[0004] To address this issue, a heat dissipation system of a hair dryer, as proposed in Chinese patent No. CN117643411A, adopts a design with dual air inlets and a fan assembly placed within a barrel. A first air inlet is provided on a case of the barrel and a second air inlet is provided on a handle assembly, where the first air inlet and the air outlet are configured for straight-in and straight-out airflow, improving the blowing effect.

[0005] However, the structure of the above heat dissipation system of a hair dryer is not compact enough, and the motor's heat dissipation effect is insufficient, resulting in lower power output of the heat dissipation system of a hair dryer. Therefore, there is a need for a heat dissipation system of a hair dryer that improves heat dissipation to achieve higher power output.BRIEF SUMMARY

[0006] In view of this, it is necessary to provide a heat dissipation system of a hair dryer that improves heat dissipation to achieve higher power output, so as to address the above issues.

[0007] The embodiments of this application provide a heat dissipation system of a hair dryer, including a housing, a barrel sleeved within the housing, a fan assembly mounted within the barrel, and a handle perpendicularly connected to the housing; where

[0008] the handle is provided with a first air inlet, the barrel is provided with a second air inlet, and the heat dissipation system of a hair dryer is provided with, along an axis of the barrel, a first air outlet, a second air outlet, and a third air outlet separately opposite to the second air inlet;

[0009] a first airflow is formed at the first air inlet, and a second airflow and a third airflow are formed at the second air inlet; and

[0010] the first airflow sequentially flows through an interior of the handle, a space between the housing and the barrel, and the first air outlet, the second airflow sequentially flows through a space between the fan assembly and the barrel, and the second air outlet, and the third airflow sequentially flows through an interior of the fan assembly and the third air outlet.

[0011] The beneficial effects of the provided heat dissipation system of a hair dryer are as follows:

[0012] By means of providing air ducts with two inlets and three outlets to generate the first airflow, the second airflow, and the third airflow, heat dissipation is performed for the heat dissipation system of a hair dryer. Specifically, the first airflow dissipates heat from the case of the handle, a circuit board within the handle, and the housing.

[0013] The second airflow dissipates heat from an outer surface of the fan assembly and a mica plate within the barrel. When a heating wire wound on the mica plate is energized, the second airflow flows through the heating wire, forming warm air.

[0014] The third airflow dissipates heat from an interior of the fan assembly, particularly targeting a heat source of the fan assembly, that is, coils wound on a rotor.

[0015] Then, to reduce a mounting space between the fan assembly and a heating member, a portion of the rotor extends into the heating member. To prevent heat generated by the heating member from causing the rotor to overheat, the third airflow flows through the heating member to remove heat.

[0016] Furthermore, to reduce the impact of heat from the mica plate on the rotor, a double-layer insulation structure is provided to minimize damage to the rotor caused by heat generated by the mica plate and the heating wire.BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a perspective view of a heat dissipation system of a hair dryer according to this application.

[0018] FIG. 2 is a rear view of the heat dissipation system of a hair dryer according to this application.

[0019] FIG. 3 is a front view of the heat dissipation system of a hair dryer according to this application.

[0020] FIG. 4 is a partial enlarged view at A in FIG. 2.

[0021] FIG. 5 is a cross-sectional view along B-B in FIG. 2 and a schematic diagram of gas flow directions of a first air duct and a third air duct.

[0022] FIG. 6 is a cross-sectional view along B-B in FIG. 2 and a schematic diagram of a gas flow direction of a second air duct.

[0023] FIG. 7 is a cross-sectional view along C-C in FIG. 2 and a schematic diagram of the gas flow direction of the third air duct.

[0024] FIG. 8 is a partial enlarged view at D in FIG. 7.

[0025] FIG. 9 is an exploded view of a housing, a fan assembly, and an air inlet member of the heat dissipation system of a hair dryer according to this application.

[0026] FIG. 10 is an exploded view of the housing, a barrel, the fan assembly, and the air inlet member of the heat dissipation system of a hair dryer according to this application.

[0027] FIG. 11 is a global perspective exploded front view of the heat dissipation system of a hair dryer according to this application.

[0028] FIG. 12 is a global perspective exploded rear view of the heat dissipation system of a hair dryer according to this application.

[0029] FIG. 13 is a cross-sectional view of FIG. 12.

[0030] FIG. 14 is a top perspective view of the fan assembly according to this application.

[0031] FIG. 15 is a bottom perspective view of the fan assembly according to this application.

[0032] FIG. 16 is a schematic diagram of an internal structure of a second air guide member according to this application.

[0033] FIG. 17 is a perspective view of a heating member according to this application.DESCRIPTION OF NUMERAL REFERENCES OF MAIN COMPONENTS100, heat dissipation system of a hair dryer;

[0035] 10, housing; 1020, ring-shaped cavity;

[0036] 20, barrel; 21, second mounting cavity;

[0037] 30, fan assembly; 31, rotating shaft; 32, rotor; 33, fan blades; 34, first air guide member; 341, first air guide vane; 342, flow guide hole; 35, second air guide member; 351, second air guide vane; 36, heating member; 361, mica plate; 362, first insulation layer; 363, second insulation layer;

[0038] 40, handle; 41, first air inlet; 42, first mounting cavity; 43, circuit board;

[0039] 50, air inlet member; 51, second air inlet;

[0040] 60, first air duct; 61, first air outlet;

[0041] 70, second air duct; 71, second air outlet;

[0042] 80, third air duct; 81, accommodation cavity; 82, heat dissipation cavity; 83, third air outlet;

[0043] 90, air exhaust member; and F1, axial direction of barrel.DETAILED DESCRIPTION OF THE DRAWINGS AND THE PRESENTLY PREFERRED EMBODIMENTS

[0044] The embodiments of this application will be described below with reference to the drawings in the embodiments of this application. It is apparent that the described embodiments are only some, but not all, of the embodiments of this application.

[0045] It should be noted that when a component is considered to be “connected” to another component, it may be directly connected to the another component, or there may be an intervening component present. When a component is considered to be “disposed” on another component, it may be directly set on the another component, or there may be an intervening component present. The terms “top,”“bottom,”“upper,”“lower,”“left,”“right,”“front,”“rear,” and similar expressions used herein are for illustrative purposes only.

[0046] Some embodiments of this application will be described in detail below with reference to the drawings. In the absence of conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0047] As shown in FIGS. 1 to 17, the embodiments of this application provide a heat dissipation system 100 of a hair dryer, including a housing 10, a barrel 20 sleeved within the housing 10, a fan assembly 30 mounted within the barrel 20, and a handle 40 perpendicularly connected to the housing 10. The handle 40 is provided with a first air inlet 41, the barrel 20 is provided with a second air inlet 51, and the heat dissipation system 100 of a hair dryer is provided with, along an axis of the barrel 20, a first air outlet 61, a second air outlet 71, and a third air outlet separately opposite to the second air inlet 51. A first airflow is formed at the first air inlet 41, and a second airflow and a third airflow are formed at the second air inlet 51. The first airflow sequentially flows through an interior of the handle 40, a space between the housing 10 and the barrel 20, and the first air outlet 61, the second airflow sequentially flows through a space between the fan assembly 30 and the barrel 20, and the second air outlet 71, and the third airflow sequentially flows through an interior of the fan assembly 30 and the third air outlet.

[0048] Specifically, the housing 10 serves as an outer protective structure of the heat dissipation system 100 of a hair dryer. The barrel 20 is sleeved within the housing 10, together with the housing 10 forming a main body of the heat dissipation system 100 of a hair dryer. The first air inlet 41 is provided on the handle 40, allowing for formation of the first airflow. The second air inlet 51 is provided on the barrel 20, allowing for formation of the second airflow and the third airflow.

[0049] The first airflow enters a first mounting cavity 42 within the handle 40 from the first air inlet 41, flows through a ring-shaped cavity 1020 between the housing 10 and the barrel 20, and is finally output from the first air outlet 61.

[0050] The handle 40 and the housing 10 are fixed together by a perpendicular connection structure, such as bolts or snap-fits. The barrel 20 and the housing 10 are tightly fitted together by sleeving or snap-fit connections. The fan assembly 30 is fixed within the barrel 20 by a mounting structure, such as a bracket.

[0051] When the heat dissipation system 100 of a hair dryer operates, the first air inlet 41 draws in external air, which becomes the first airflow after entering a first air duct 60. The first airflow flows through the interior of the handle 40, dissipating heat from components such as a circuit board 43 within the handle 40. Then, the first airflow flows through the ring-shaped cavity 1020 between the housing 10 and the barrel 20, dissipating heat from the housing 10. Finally, the first airflow is output from the first air outlet 61.

[0052] The second air inlet 51 draws in external air, part of which becomes the second airflow after entering a second air duct 70. The second airflow flows through a second mounting cavity 21 between the fan assembly 30 and the barrel 20, dissipating heat from an outer surface of the fan assembly 30, for example, from the fan blades, a first air guide member 34, a second air guide member 35, and an outer surface of a mica plate 361. When a heating wire wound on the mica plate 361 is energized, the second airflow flows through the heating wire, forming warm air. Finally, the second airflow is output from the second air outlet 71. Finally, the second airflow is output from the second air outlet 71, forming a straight-in and straight-out airflow path.

[0053] The second air inlet 51 draws in external air, another part of which becomes the third airflow after entering a third air duct 80. The third airflow passes through gaps between the fan blades into flow guide holes 342 of the first air guide member 34, directly flows through the interior of the fan assembly 30, dissipating heat from a heat source within the fan assembly 30 such as coils, and then is output from the third air outlet. It directly flows through the interior of the fan assembly 30, dissipating heat from a heat source of the fan assembly 30, such as coils wound on a rotor 32. The third airflow, after dissipating heat, is output from the third air outlet.

[0054] By means of providing two air inlets and three air outlets, a plurality of airflow paths are formed, improving the heat dissipation effect of the heat dissipation system 100 of a hair dryer. The first airflow dissipates heat from the case of the handle 40, the circuit board 43 within the handle 40, and the housing 10, reducing the overall temperature. The second airflow dissipates heat from the outer surface of the fan assembly 30 and the mica plate 361 within the barrel 20, while forming warm air output. The third airflow dissipates heat from the interior of the fan assembly 30, particularly targeting the heat source, improving the stability and lifespan of the fan assembly 30.

[0055] In a specific embodiment, the heat dissipation system 100 of a hair dryer further includes a first air duct 60. The first air duct 60 includes: the first air inlet 41, a first mounting cavity 42, a ring-shaped cavity 1020, and the first air outlet 61. The first mounting cavity 42 is provided within the handle 40, the first mounting cavity 42 communicates with the first air inlet 41, and a circuit board 43 is mounted within the first mounting cavity 42. The ring-shaped cavity 1020 is formed between the housing 10 and the barrel 20. An end of the first mounting cavity 42 facing away from the first air inlet 41 communicates with the ring-shaped cavity 1020, and the ring-shaped cavity 1020 communicates with the first air outlet 61. The first air outlet 61 is formed by the housing 10 and the barrel 20 in a sleeving manner, and the second air inlet 51 and the first air outlet 61 are respectively located at two ends of the axis of the barrel 20. The first airflow sequentially flows through the first air inlet 41, the first mounting cavity 42, the circuit board 43, the ring-shaped cavity 1020, and the first air outlet 61. The first airflow circulates to reduce heat of the circuit board 43 and the housing 10.

[0056] Specifically, the first air inlet 41 is located on the handle 40, serving as an entrance for external air, and the first air inlet 41 is provided with a filter to filter dust, hair, and the like. The first mounting cavity 42 is provided inside the handle 40, directly communicating with the first air inlet 41, for mounting the circuit board 43. The ring-shaped cavity 1020 is formed between the housing 10 and the barrel 20, serving as one of the main channels for the second airflow. The first air outlet 61 is formed by a gap between the housing 10 and the barrel 20 in a sleeving manner, serving as an exit for the airflow.

[0057] The first air inlet 41 directly communicates with the first mounting cavity 42, ensuring smooth airflow into the interior of the handle 40. The first mounting cavity 42 communicates with the ring-shaped cavity 1020 through a connection structure of the handle 40 with the housing 10 and the barrel 20, and the airflow flows out from the first mounting cavity 42 into the ring-shaped cavity 1020. The ring-shaped cavity 1020 surrounds the barrel 20 and is connected to the first air outlet 61 at its open end, where the airflow flows through the ring-shaped cavity 1020 and is discharged from the first air outlet 61.

[0058] The circuit board 43 is mounted within the first mounting cavity 42, directly exposed to the first airflow, facilitating heat dissipation. The second air inlet 51 and the first air outlet 61 are axially arranged, facilitating airflow convection.

[0059] Through the first air duct 60, the airflow can directly flow through the circuit board 43, effectively removing heat from the circuit board 43, while also dissipating heat from the housing 10 as it flows through the ring-shaped cavity 1020.

[0060] In a specific embodiment, the heat dissipation system 100 of a hair dryer further includes a second air duct 70. The second air duct 70 includes: the second air inlet 51, a second mounting cavity 21, and the second air outlet 71. The heat dissipation system 100 of a hair dryer includes an air inlet member 50 sleeved at one end of the housing 10, where the air inlet member 50 is provided with the second air inlet 51. The second air outlet 71 is provided on the barrel 20, where the second air outlet 71 is located at an end facing away from the second air inlet 51. The second mounting cavity 21 is provided along an axial direction F1 of the barrel, and the second air inlet 51 and the second air outlet 71 respectively communicate with two ends of the second mounting cavity 21. The second airflow sequentially flows through the second air inlet 51, the second mounting cavity 21, and the second air outlet 71, and when flowing through the second mounting cavity 21, the second airflow dissipates the heat from the fan assembly 30.

[0061] Specifically, the second air inlet 51 is provided on the air inlet member 50, connected to one end of the housing 10 by sleeving, serving as an entrance for the second airflow and the third airflow. The second air inlet 51 is provided with at least a double-layer filter.

[0062] The second mounting cavity 21 is provided along the axial direction F1 of the barrel, and the second mounting cavity 21 serves as a mounting space for the fan assembly 30 and a main channel for the airflow.

[0063] Two ends of the second mounting cavity 21 communicate with the second air inlet 51 and the second air outlet 71, respectively, forming a complete airflow channel.

[0064] The fan assembly 30 is mounted within the second mounting cavity 21, directly exposed to the second airflow, facilitating heat dissipation. The second air outlet 71 is located at an end facing away from the second air inlet 51, facilitating airflow convection.

[0065] External air enters the second air inlet 51 from the air inlet member 50 and then flows into the second mounting cavity 21. Within the second mounting cavity 21, the second airflow directly contacts the fan assembly 30, removing heat from the fan assembly 30. Subsequently, the airflow is discharged from the second air outlet 71, forming a complete heat dissipation path.

[0066] In a specific embodiment, the fan assembly 30 is coaxially arranged with the barrel 20, and the fan assembly 30 includes a rotating shaft 31, a rotor 32, fan blades 33, a first air guide member 34, and a second air guide member 35. The rotating shaft 31 is located at an axial center of the barrel 20, the rotor 32 is wound with coils, the fan blades 33, the first air guide member 34, and the rotor 32 sequentially and adjacently sleeve the rotating shaft 31 along an axial direction F1 of the barrel, and the fan blades 33 are located at an end close to the second air inlet 51. The second mounting cavity 21 is formed by connecting the second air guide member 35 and the barrel 20. The second air guide vanes 35133 sleeve the first air guide member 34. The second air guide member 35 is connected to the first air guide member 34. The second air guide vanes 35133 are located at an end facing away from the fan blades 33. The rotor 32 is located within the second air guide member 35. The fan blades 33 generate the second airflow, the second airflow is a swirling airflow, and the second airflow flows through the first air guide member 34 to reduce heat of the first air guide member 34 and perform a first rectification. The second airflow flows through the second air guide member 35 to reduce heat of the second air guide member 35 and perform a second rectification, and after the second rectification, the second airflow becomes a straight-through airflow.

[0067] Specifically, the rotating shaft 31 is not only a common support structure for the fan blades 33, the rotor 32, the first air guide member 34, and the second air guide member 35, but also the center point of their rotation. The fan blades 33, the rotor 32, the first air guide member 34, the second air guide member 35, and the mica plate 361 all rotate around the rotating shaft 31. The rotating shaft 31 is typically made of high-strength, wear-resistant material to ensure it can withstand various forces and stresses during fan operation.

[0068] The rotor 32 is wound on the rotating shaft 31, and located between the fan blades 33 and the first air guide member 34. The rotor 32 is a power source of the fan assembly 30. When the coils are energized, the rotor 32 generates a magnetic field, which interacts with an external fixed magnetic field to produce rotational force, driving the rotating shaft 31 to rotate. The rotor 32 is typically made of magnetic material.

[0069] The fan blades 33 are located at an end close to the second air inlet 51, directly attached to the rotating shaft 31. When the rotating shaft 31 rotates, the fan blades 33 rotate accordingly, generating a swirling airflow, namely the second airflow. This airflow is the main source of air blown out by the heat dissipation system 100 of a hair dryer. The design of the fan blades 33 typically includes a plurality of blades.

[0070] The first air guide member 34 is located between the fan blades 33 and the rotor 32, typically immediately following the fan blades 33. The primary role of the first air guide member 34 is preliminary rectification and heat dissipation. It can adjust the swirling airflow generated by the fan blades 33 to a certain extent while helping to dissipate heat generated by the fan assembly 30 during operation. The first air guide member 34 typically has a streamlined design to reduce airflow resistance.

[0071] The second air guide member 35 is connected to the first air guide member 34, and located at an end facing away from the fan blades 33, with one end of the rotor 32 extending into the second air guide member 35 and the other end of the rotor 32 extending into a heating member 36. The primary role of the second air guide member 35 is further rectification and heat dissipation. It can further optimize the airflow adjusted by the first air guide member 34, making it smoother and straight-through, while continuing to dissipate heat from the fan assembly 30. At the same time, the straight-through second airflow also reduces noise within the barrel.

[0072] The second air guide member 35 may include a plurality of channels, heat sinks, and / or other heat dissipation structures to ensure optimal rectification and heat dissipation effects.

[0073] The second mounting cavity 21 is formed by connecting the second air guide member 35 and the barrel 20, serving as a main channel for the second airflow. This ensures that the airflow can pass through smoothly and dissipate heat.

[0074] In a specific embodiment, the fan assembly 30 further includes a heating member 36, the heating member 36 is sleeved within the barrel 20, and the heating member 36 is connected to all the first air guide member 34, the second air guide member 35, and the rotor 32. The heating member 36 includes a mica plate 361, a plurality of the mica plates 361 surround the rotating shaft 31, and one of the mica plates 361 is wound with a heating wire. When flowing through the mica plate 361, the second airflow dissipates heat from the mica plate 361. When flowing through the heating wire, the second airflow forms warm air.

[0075] Specifically, the heating member 36 serves as a heating element of the heat dissipation system 100 of a hair dryer, the heating member 36 is sleeved within the barrel 20, and the heating member 36 is connected to the first air guide member 34, the second air guide member 35, and the rotor 32. This ensures that the heating member 36 is stably fixed within the fan assembly 30, while facilitating heat transfer and dissipation.

[0076] The plurality of mica plates 361 are evenly arranged around the rotating shaft 31. The heating wire generates heat when energized, the heat capacity ratio of the mica plate 361 is greater than that of the heating wire, and the mica plate 361 is used for insulation to prevent heat from directly transferring to other components.

[0077] Each mica plate 361 is wound with the heating wire, which serves as a heat source. When the heating wire is energized, it generates heat, and the second airflow forms warm air after flowing through the heating wire.

[0078] The second airflow, when flowing through the fan assembly 30, first passes through the mica plate 361 to dissipate heat. Due to the insulating properties of the mica plate 361, the mica plate 361 can effectively slow down the release of heat, such that the second airflow can absorb sufficient heat when flowing through the heating wire, forming warm air. At the same time, the second airflow also carries away some of the heat from the mica plate 361 and the heating wire, providing a heat dissipation effect.

[0079] In a specific embodiment, the first air guide member 34 is formed by a plurality of first air guide vanes 341, the plurality of first air guide vanes 341 surround the rotating shaft 31, the second air guide member 35 is formed by a plurality of second air guide vanes 35133, the plurality of second air guide vanes 35133 surround the rotating shaft 31, the second air guide vane 35133 is connected to a tail end of the first air guide vane 341, and the mica plate 361 contacts and adheres to a tail end of the second air guide vane 35133.

[0080] A quantity of the first air guide vanes 341 is denoted as A, a quantity of the second air guide vanes 35133 is denoted as S, and a quantity of the mica plates 361 is denoted as F, satisfying the following relationships:A>S;andS=F,where one of the mica plates 361 contacts a tail end of one of the air guide vanes 33.

[0082] The first air guide vane 341 and the rotating shaft 31 form a first included angle along the axial direction F1 of the barrel, the first included angle being denoted as U, the second air guide vane 35133 and the rotating shaft 31 form a second included angle along the axial direction F1 of the barrel, the second included angle being denoted as Q, and the mica plate 361 and the rotating shaft 31 form a third included angle along the axial direction F1 of the barrel, the third included angle being denoted as W, satisfying the following relationships:W=0⁢°;W<Q<U;U⩽60⁢°;andQ>10⁢°.

[0083] Specifically, the first air guide member 34 is formed by a plurality of first air guide vanes 341, and the first air guide vanes 341 surround the rotating shaft 31, forming a preliminary rectification structure. The primary role of the first air guide vanes 341 is to perform a first rectification on the swirling second airflow generated by drawing external air through the fan blades 33, making it transition from turbulent to smooth and orderly.

[0084] The second air guide member 35 is formed by a plurality of second air guide vanes 35133, and the second air guide vanes 35133 also surround the rotating shaft 31 and are connected to the tail ends of the first air guide vanes 341, for receiving the second airflow after the first rectification. The second air guide vanes 35133 perform a second rectification on the second airflow, ensuring that the second airflow after the second rectification is a straight-through airflow.

[0085] The second airflow flows through gaps between adjacent first air guide vanes 341, undergoing the first rectification based on the tilt curvature of the first air guide vane 341, where the tilt curvature of the first air guide vane 341 is defined by an included angle between the first air guide vane 341 and the rotating shaft 31, this angle being the first included angle, denoted as U.

[0086] The second airflow flows through gaps between adjacent second air guide vanes 35133, undergoing the second rectification based on the tilt curvature of the second air guide vane 35133, where the tilt curvature of the second air guide vane 35133 is defined by an included angle between the second air guide vane 35133 and the rotating shaft 31, this angle being the second included angle, denoted as Q.

[0087] Each mica plate 361 contacts and adheres to a tail end of one of the second air guide vanes 35133, with gaps between adjacent mica plates 361 connecting to gaps between adjacent second air guide vanes 35133, for directly receiving the second airflow after the second rectification, reducing loss of the second airflow after the second rectification, and allowing the second airflow to directly act on the mica plate 361 to dissipate heat from the mica plate 361 or flow through an energized heating wire to form warm air.

[0088] W<Q<U indicates that the second airflow undergoes gradual rectification through the first air guide member 34, the second air guide member 35, and the mica plate 361, gradually transforming the turbulent swirling second airflow into a straight-through second airflow;

[0089] The first included angle being greater than the second included angle helps capture the swirling airflow generated by the fan blades 33 and perform preliminary rectification. Due to the presence of the included angle U, the first air guide vanes 341 can guide the airflow along their tilted curved surfaces, reducing the rotational component of the airflow and increasing its axial component.

[0090] The included angle Q between the second air guide vanes 35133 and the rotating shaft 31 is smaller, further facilitating the rectification process of the airflow. Compared with the first air guide vanes 341, the second air guide vanes 35133 fine-tune the airflow with a smaller included angle, making it closer to a straight-through state. Through gaps between adjacent second air guide vanes 35133, the airflow exits smoothly, reducing the formation of turbulence and vortices.

[0091] Each E mica plate 361 contacts a tail end of one of the second air guide vanes 35133, ensuring that the airflow after the second rectification can directly act on the mica plate 361. When the airflow passes through the mica plate 361, it not only carries away the heat but is further rectified into a straight-through second airflow.

[0092] If the heating wire wound on the mica plate 361 is energized, the airflow absorbs heat while passing through, forming warm air while maintaining smooth airflow output.

[0093] The first air guide vanes 341 and the second air guide vanes 35133 together transform the swirling air duct into a straight air duct, ensuring that the airflow remains in a straight-through state as it flows through the entire fan assembly 30. The adhered connection between the mica plate 361 and the second air guide vanes 35133 ensures efficient heat transfer to the airflow, while the insulating properties of the mica plate 361 prevent excessive heating of other parts of the fan assembly 30.

[0094] Through airflow rectification experiments, the impact of different angles of air guide vanes on the rectification effect is verified. The experimental principle is based on the basic principle of airflow rectification, which involves guiding and adjusting the flow of gas to reduce turbulence and resistance, thereby improving the stability of the gas within the channel. In the experiment, two air guide vanes with different angles, the first air guide vane and the second air guide vane, were used to represent different rectification stages. The airflow speed after rectification was measured to evaluate the effect of the rectification.Experimental Materials:

[0095] Fan

[0096] Two air guide vanes with different angles, used for first and second stages of rectification, respectively.

[0097] Anemometer

[0098] Angle measuring instrumentExperimental Steps:

[0099] The fan was placed at one end of the experimental table and secured.

[0100] The first air guide vane was fixed at angle U at the fan outlet, ensuring smooth airflow passage.

[0101] At a certain distance behind the first air guide vane, the second air guide vane was fixed at angle Q, ensuring the airflow underwent two stages of rectification.

[0102] The anemometer was set up behind the second air guide vane to measure the airflow speed after rectification.

[0103] The fan was turned on, allowing the airflow to pass through the air guide vanes for rectification, and the anemometer readings were recorded.

[0104] The experiment was repeated, the angles U and Q were changed, and the airflow speeds after rectification at different angles were observed and recorded.Experimental DataSecond airExperimentFirst air guide vaneguide vaneAirflow speed afternumberangle U (°)angle Q (°)rectification (m / s)130202.4230102.0345302.6445202.9560402.7660302.0775502.1Experimental Results and Analysis

[0105] From the experimental data, it can be seen that when the first air guide vane angle U and the second air guide vane angle Q are moderate, such as U=45° and Q=20°, the airflow speed after rectification is relatively stable and high.

[0106] When U is greater than 60° or Q equals 10°, the rectification effect may be compromised, leading to reduced or unstable airflow speed.

[0107] In a specific embodiment, the heating member 36 further includes: a first insulation layer 362 and a second insulation layer 363 sleeved with the first insulation layer 362, the mica plate 361 is connected to the first insulation layer 362, and the rotor 32 extends into the heating member 36.

[0108] Specifically, the first insulation layer 362 and the second insulation layer 363 prevent overheating of the rotor 32 within the heating member 36 (the heat dissipation cavity 82). The third airflow carries away heat from the heat dissipation cavity 82, preventing the temperature in the heat dissipation cavity 82 from becoming too high and damaging the rotor 32.

[0109] A gap is formed between the first insulation layer 362 and the second insulation layer 363 when they are sleeved together, increasing the heat conduction area.

[0110] When the heat dissipation system 100 of a hair dryer operates, airflow enters from the air inlet, passes through a series of channels such as the interior of the handle 40 and the ring-shaped cavity 1020, and then enters the region of the heating member 36. In the region of the heating member 36, the airflow contacts the mica plate 361 and the first and second insulation layers 363, carrying away the heat transferred by them. Since the air intake volume is less than the air exhaust volume, the airflow creates a “retention” effect within the heat dissipation system 100 of a hair dryer, allowing the airflow to more fully contact each component, thereby more effectively carrying away heat.

[0111] In a specific embodiment, the fan assembly 30 includes a third air duct 80. The third air duct 80 includes a second air intake, the second mounting cavity 21, flow guide holes 342, an accommodation cavity 81, a heat dissipation cavity 82, and a third air outlet 83. The first air guide member 34 is provided with the flow guide holes 342, the flow guide holes 342 are arranged along an axial direction of the barrel 20, the plurality of flow guide holes 342 surround the rotating shaft 31, and the flow guide holes 342 communicate with the second mounting cavity 21. The accommodation cavity 81 is a gap between coils wound on the rotor 32, the accommodation cavity 81 communicates with the flow guide holes 342, and the accommodation cavity 81 is located at an end facing away from the second air intake. The heat dissipation cavity 82 is formed by connecting the rotor 32 and the second insulation layer 363, the heat dissipation cavity 82 communicates with the accommodation cavity 81, and the rotor 32 and a connecting shaft extend into the heat dissipation cavity 82. The heat dissipation system 100 of a hair dryer includes an air outlet member covered within the barrel 20, and the third air outlet is located between the air inlet member and the barrel 20.

[0112] Specifically, the fan assembly 30 incorporates the third air duct 80, which is a key component of the airflow path.

[0113] The third air duct 80 includes the second air intake, the second mounting cavity 21, the flow guide holes 342, the accommodation cavity 81, the heat dissipation cavity 82, and the third air outlet 83, collectively forming the airflow path within the fan assembly 30.

[0114] The first air guide member 34 is provided with the flow guide holes 342, and the flow guide holes 342 are arranged along the axial direction of the barrel 20, with the plurality of flow guide holes 342 surrounding the rotating shaft 31 to ensure even airflow distribution.

[0115] The flow guide holes 342 connect the second mounting cavity 21 with subsequent airflow paths, such as the accommodation cavity 81.

[0116] The accommodation cavity 81 is a gap between the coils wound on the rotor 32, and located at an end facing away from the second air intake. This gap not only provides a mounting space for the coils but also serves as part of the airflow channel, allowing airflow to pass through and carry away heat from the coils.

[0117] The heat dissipation cavity 82 is formed by connecting the rotor 32 and the second insulation layer 363, and it communicates with the accommodation cavity 81. The heat dissipation cavity 82 further reduces heat from the mica plate 361 and the heating wire, preventing heat in the second mounting cavity 21 from entering the heat dissipation cavity 82 through the first insulation layer 362 and the second insulation layer 363. The rotor 32 and the connecting shaft extend into the heat dissipation cavity 82, facilitating the transfer of heat from the interior to the external airflow.

[0118] The heat dissipation system 100 of a hair dryer further includes an air outlet member, which is covered within the barrel 20 and located between the air inlet member and the barrel 20. The third air outlet is located on the air outlet member, serving as the final step for the airflow to exit the heat dissipation system 100 of a hair dryer.

[0119] The above descriptions are merely implementations of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, and these improvements fall within the scope of protection of this application.

Claims

1. A heat dissipation system of a hair dryer, comprising a housing, a barrel sleeved within the housing, a fan assembly mounted within the barrel, and a handle perpendicularly connected to the housing; whereinthe handle is provided with a first air inlet, the barrel is provided with a second air inlet, and the heat dissipation system of a hair dryer is provided with, along an axis of the barrel, a first air outlet, a second air outlet, and a third air outlet separately opposite to the second air inlet;a first airflow is formed at the first air inlet, and a second airflow and a third airflow are formed at the second air inlet; andthe first airflow sequentially flows through an interior of the handle, a space between the housing and the barrel, and the first air outlet, the second airflow sequentially flows through a space between the fan assembly and the barrel, and the second air outlet, and the third airflow sequentially flows through an interior of the fan assembly and the third air outlet.

2. The heat dissipation system of a hair dryer according to claim 1, wherein the heat dissipation system of a hair dryer further comprises a first air duct, and the first air duct comprises the first air inlet, a first mounting cavity, a ring-shaped cavity, and the first air outlet; whereinthe first mounting cavity is provided within the handle, the first mounting cavity communicates with the first air inlet, and a circuit board is mounted within the first mounting cavity;the ring-shaped cavity is formed between the housing and the barrel, an end of the first mounting cavity facing away from the first air inlet communicates with the ring-shaped cavity, and the ring-shaped cavity communicates with the first air outlet;the first air outlet is formed by the housing and the barrel in a sleeving manner, and the second air inlet and the first air outlet are respectively located at two ends of the axis of the barrel; andthe first airflow sequentially flows through the first air inlet, the first mounting cavity, the circuit board, the ring-shaped cavity, and the first air outlet, and the first airflow circulates to reduce heat of the circuit board and the housing.

3. The heat dissipation system of a hair dryer according to claim 2, wherein the heat dissipation system of a hair dryer further comprises a second air duct, and the second air duct comprises the second air inlet, a second mounting cavity, and the second air outlet; whereinthe heat dissipation system of a hair dryer comprises an air inlet member sleeved at one end of the housing, the air inlet member is provided with the second air inlet, the second air outlet is provided on the barrel, and the second air outlet is located at an end facing away from the second air inlet;the second mounting cavity is provided along an axial direction of the barrel, and the second air inlet and the second air outlet respectively communicate with two ends of the second mounting cavity; andthe second airflow sequentially flows through the second air inlet, the second mounting cavity, and the second air outlet, and when flowing through the second mounting cavity, the second airflow reduces heat of the fan assembly mounted within the second mounting cavity.

4. The heat dissipation system of a hair dryer according to claim 1, wherein the fan assembly is coaxially arranged with the barrel, the fan assembly is located within the second mounting cavity, and the fan assembly comprises a rotating shaft, a rotor, fan blades, a first air guide member, and a second air guide member; whereinthe rotating shaft is located at an axial center of the barrel, the rotor is wound with coils, the fan blades, the first air guide member, and the rotor sequentially and adjacently sleeve the rotating shaft along an axial direction of the barrel, and the fan blades are located at an end close to the second air inlet;the second mounting cavity is formed by connecting the second air guide member and the barrel;second air guide vanes sleeve the first air guide member, the second air guide member is connected to the first air guide member, the second air guide vanes are located at an end facing away from the fan blades, and the rotor is located within the second air guide member;the fan blades generate the second airflow, the second airflow is a swirling airflow, and the second airflow flows through the first air guide member to reduce heat of the first air guide member and perform a first rectification; andthe second airflow flows through the second air guide member to reduce heat of the second air guide member and perform a second rectification, and after the second rectification, the second airflow becomes a straight-through airflow.

5. The heat dissipation system of a hair dryer according to claim 4, wherein the fan assembly further comprises a heating member, and the heating member is sleeved within the barrel and connected to all the first air guide member, the second air guide member, and the rotor;the heating member comprises a mica plate, a plurality of the mica plates surround the rotating shaft, and one of the mica plates is wound with a heating wire;when flowing through the mica plate, the second airflow dissipates heat from the mica plate; andwhen flowing through the heating wire, the second airflow forms warm air.

6. The heat dissipation system of a hair dryer according to claim 3, wherein the first air guide member is formed by a plurality of first air guide vanes, the plurality of first air guide vanes surround the rotating shaft, the second air guide member is formed by a plurality of second air guide vanes, the plurality of second air guide vanes surround the rotating shaft, the second air guide vanes are connected to tail ends of the first air guide vanes, and one of the mica plates contacts and adheres to a tail end of one of the second air guide vanes.

7. The heat dissipation system of a hair dryer according to claim 6, wherein a quantity of the first air guide vanes is denoted as A, a quantity of the second air guide vanes is denoted as S, and a quantity of the mica plates is denoted as F, satisfying the following relationships:A>S;andS=F,wherein one of the mica plates contacts a tail end of one of the air guide vanes.

8. The heat dissipation system of a hair dryer according to claim 7, wherein the first air guide vane and the rotating shaft form a first included angle along the axial direction of the barrel, the first included angle being denoted as U, the second air guide vane and the rotating shaft form a second included angle along the axial direction of the barrel, the second included angle being denoted as Q, and the mica plate and the rotating shaft form a third included angle along the axial direction of the barrel, the third included angle being denoted as W, satisfying the following relationships:W=0⁢°;W<Q<U;U⩽60⁢°;andQ>10⁢°.

9. The heat dissipation system of a hair dryer according to claim 5, wherein the heating member further comprises a first insulation layer and a second insulation layer sleeved with the first insulation layer, the mica plate is connected to the first insulation layer, and the rotor extends into the heating member.

10. The heat dissipation system of a hair dryer according to claim 9, wherein the fan assembly comprises a third air duct, and the third air duct comprises a second air intake, the second mounting cavity, flow guide holes, an accommodation cavity, a heat dissipation cavity, and the third air outlet, whereinthe first air guide member is provided with the flow guide holes, the flow guide holes are arranged along the axial direction of the barrel, the plurality of the flow guide holes surround the rotating shaft, and the flow guide holes communicate with the second mounting cavity;the accommodation cavity is a gap between the coils wound on the rotor, the accommodation cavity communicates with the flow guide holes, and the accommodation cavity is located at an end facing away from the second air intake;the heat dissipation cavity is formed by connecting the rotor and the second insulation layer, the heat dissipation cavity communicates with the accommodation cavity, and the rotor and a connecting shaft extend into the heat dissipation cavity; andthe heat dissipation system of a hair dryer comprises an air outlet member covered within the barrel, and the third air outlet is located between the air inlet member and the barrel.

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