A heat dissipation system for a hair dryer

Abstract

The application provides a heat dissipation system of a hair dryer, which comprises a shell, a barrel arranged in the shell, a fan assembly arranged in the barrel, and a handle vertically connected with the shell. The handle is provided with a first air inlet, the barrel is provided with a second air inlet, the heat dissipation system of the hair dryer is provided with a first air outlet, a second air outlet and a third air outlet along the axis of the barrel, and the first air outlet, the second air outlet and the third air outlet are respectively arranged opposite to the second air inlet. The first air inlet forms a first airflow, the second air inlet forms a second airflow and a third airflow. The first airflow flows through the handle, the space between the shell and the barrel and the first air outlet in sequence, the second airflow flows through the fan assembly, the space between the fan assembly and the barrel and the second air outlet in sequence, and the third airflow flows through the fan assembly and the third air outlet in sequence. The above structure improves the heat dissipation structure of the heat dissipation system of the hair dryer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hair dryers, in particular to a heat dissipation system of a hair dryer. BACKGROUND

[0002] High-speed hair dryers are currently very popular among consumers due to their powerful wind force, fast drying ability, and usually equipped with advanced temperature control technology. They use high-performance motors to generate high-speed air flow, effectively reducing the time of drying hair, while reducing heat damage and protecting hair health. However, the fan assembly of the previous high-speed hair dryer is arranged at the handle, and the air outlet is at the barrel, so the air flow needs to be bent by 90 degrees, which is easy to cause air volume loss.

[0003] In order to solve this problem, the existing heat dissipation system of the hair dryer uses an electric hair dryer design with double air inlets and a fan assembly arranged in the barrel, as disclosed in Chinese patent CN117643411A. The first air inlet is arranged on the hair dryer shell, and the second air inlet is arranged on the handle assembly. The first air inlet and the air outlet are straight in and straight out, which improves the drying effect.

[0004] However, the heat dissipation system of the hair dryer described above has a structure that is not compact enough, and the motor has insufficient heat dissipation effect, resulting in a low power of the heat dissipation system of the hair dryer. Therefore, there is a need for a heat dissipation system of a hair dryer that improves the heat dissipation effect to increase the power. SUMMARY

[0005] Therefore, it is necessary to provide a heat dissipation system of a hair dryer that improves the heat dissipation effect to increase the power, in order to solve the above problems.

[0006] The embodiments of the present application provide a heat dissipation system of a hair dryer, which comprises an outer shell, a barrel arranged in the outer shell, a fan assembly arranged in the barrel, and a handle connected perpendicularly to the outer shell.

[0007] The handle is provided with a first air inlet, and the barrel is provided with a second air inlet. The heat dissipation system of the hair dryer is provided with a first air outlet, a second air outlet, and a third air outlet arranged opposite to the second air inlet along the axis of the barrel.

[0008] The first air inlet forms a first air flow, and the second air inlet forms a second air flow and a third air flow.

[0009] The first air flow flows through the handle, the space between the outer shell and the barrel, and the first air outlet in sequence. The second air flow flows through the fan assembly, the space between the barrel and the fan assembly, and the second air outlet in sequence. The third air flow flows through the fan assembly and the third air outlet in sequence.

[0010] In at least one embodiment of the present application, the heat dissipation system of the hair dryer further comprises a first air duct, the first air duct comprising: the first air inlet, a first mounting cavity, an annular cavity and the first air outlet;

[0011] The first mounting cavity is arranged in the handle, and the first mounting cavity is in communication with the first air inlet, and the circuit board is arranged in the first mounting cavity;

[0012] The annular cavity is formed between the shell and the barrel, and the end of the first mounting cavity away from the first air inlet is in communication with the annular cavity, and the annular cavity is in communication with the first air outlet;

[0013] The first air outlet is formed by the shell and the barrel, and the second air inlet and the first air outlet are respectively located at both ends of the axis of the barrel;

[0014] The first air flow sequentially flows through the first air inlet, the first mounting cavity, the circuit board, the annular cavity and the first air outlet, and the first air flow is circulated to reduce the heat of the circuit board and the shell.

[0015] In at least one embodiment of the present application, the heat dissipation system of the hair dryer further comprises a second air duct, the second air duct comprising: a second air inlet, a second mounting cavity, a second air outlet;

[0016] The heat dissipation system of the hair dryer comprises an air inlet member sleeved with one end of the shell, the air inlet member is provided with a second air inlet, the second air outlet is arranged on the barrel, and the second air outlet is located at an end away from the second air inlet;

[0017] The second mounting cavity is arranged along the axis of the barrel, and the second air inlet and the second air outlet are respectively in communication with both ends of the second mounting cavity;

[0018] The second air flow sequentially flows through the second air inlet, the second mounting cavity and the second air outlet, and when the second air flow flows through the second mounting cavity, the heat of the fan assembly arranged in the second mounting cavity is reduced.

[0019] In at least one embodiment of the present application, the fan assembly is coaxially arranged with the barrel, the fan assembly is arranged in the second mounting cavity, and the fan assembly comprises a rotating shaft, a rotor, a fan blade, a first air guide member and a second air guide member;

[0020] The rotating shaft is located at the center of the barrel, the rotor is provided with a coil, the fan blade, the first air guide member and the rotor are sequentially and adjacently sleeved on the rotating shaft along the axis of the barrel, and the fan blade is located at an end close to the second air inlet;

[0021] The second installation cavity is formed by the second air guide and the cylinder;

[0022] The second air guide is sleeved on the first air guide, the second air guide is connected with the first air guide, the second air guide is located at one end away from the fan blade, and the rotor is located in the second air guide;

[0023] The fan blade generates a second air flow, the second air flow is a rotating air flow, the second air flow flows through the first air guide, reduces the heat of the first air guide, and is first rectified;

[0024] The second air flow flows through the second air guide, reduces the heat of the second air guide, and is second rectified, and after the second rectification, the second air flow is a straight-in straight-out air flow.

[0025] In at least one embodiment of the present application, the fan assembly further comprises a heating element, the heating element is sleeved in the cylinder, and is connected with the first air guide, the second air guide, and the rotor respectively;

[0026] The heating element comprises a mica plate, a plurality of mica plates are arranged around the rotating shaft, and one mica plate is provided with a heating wire;

[0027] When the second air flow flows through the mica plate, the mica plate is cooled;

[0028] When the second air flow flows through the heating wire, warm air is formed.

[0029] In at least one embodiment of the present application, the first air guide is composed of a plurality of first air blades, a plurality of first air blades are arranged around the rotating shaft, the second air guide is composed of a plurality of second air blades, a plurality of second air blades are arranged around the rotating shaft, the second air blade is located at the tail end of the first air blade, and one mica plate is connected with and adheres to one second air blade.

[0030] In at least one embodiment of the present application, the number of first air blades is denoted as A, the number of second air blades is denoted as S, and the number of mica plates is denoted as F, which satisfies the following relationship:

[0031] A>S;

[0032] S=F;

[0033] One mica plate is connected with the tail end of one air guide.

[0034] In at least one embodiment of the present application, the first air guide blade and the rotating shaft form a first included angle along the axial direction of the barrel, the first included angle is denoted as U, the second air guide blade and the rotating shaft form a second included angle along the axial direction of the barrel, the second included angle is denoted as Q, and the mica plate and the rotating shaft form a third included angle along the axial direction of the barrel, the second included angle is denoted as Q, and the following relationship is satisfied:

[0035] W = 0°;

[0036] W < Q < U;

[0037] U ≤ 60°;

[0038] Q > 10°.

[0039] In at least one embodiment of the present application, the heating element further comprises: a first heat insulation layer and a second heat insulation layer sleeved with the first heat insulation layer, the mica plate is connected with the first heat insulation layer, and the rotor extends into the heating element.

[0040] In at least one embodiment of the present application, the fan assembly comprises a third air duct, and the third air duct comprises: a second air inlet, a second mounting cavity, a flow guide hole, a placement cavity, a heat dissipation cavity, and a third air outlet.

[0041] The first air guide member is provided with the flow guide hole, the flow guide hole is arranged along the axial direction of the barrel, a plurality of flow guide holes are arranged around the rotating shaft, and the flow guide hole communicates with the second mounting cavity.

[0042] The placement cavity is a gap between the coils of the rotor, the placement cavity communicates with the flow guide hole, and the placement cavity is located at one end away from the second air inlet.

[0043] The heat dissipation cavity is formed by the rotor and the second heat insulation layer, the heat dissipation cavity communicates with the placement cavity, the rotor and the connecting shaft extend into the heat dissipation cavity.

[0044] The heat dissipation system of the hair dryer comprises an air outlet member arranged in the barrel, and the third air outlet is located between the air outlet member and the barrel.

[0045] The hair dryer heat dissipation system provided above has the following beneficial effects:

[0046] The first air flow, the second air flow and the third air flow are generated by setting the 2-in-3-out air duct to dissipate heat of the hair dryer system, and the specific heat dissipation effect is that the first air flow dissipates heat of the handle shell, the circuit board in the handle, and the shell.

[0047] The second air flow dissipates heat of the outer layer of the fan assembly in the barrel and the mica plate, when the heating wire wound on the mica plate is electrified, the second air flow flows through the heating wire, and the second air flow forms warm air.

[0048] The third air flow is directed to the inside of the fan assembly, and especially to the heat source (the coil wound on the rotor) of the fan assembly,

[0049] Then, in order to reduce the installation space of the fan assembly and the heat generating element, the rotor part is extended into the heat generating element, and in order to avoid the heat generated by the heat generating element from affecting the overheating of the rotor, the third air flow passes through the heat generating element to take away the heat;

[0050] Further, in order to reduce the influence of the heat generated by the mica plate on the rotor, a double-layer heat insulation layer is provided to reduce the damage of the heat generated by the mica plate and the heating wire to the rotor. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is a three-dimensional assembly schematic diagram of the heat dissipation system of the hair dryer described in the present application;

[0052] Figure 2 It is a rear assembly schematic diagram of the heat dissipation system of the hair dryer described in the present application;

[0053] Figure 3 It is a front assembly schematic diagram of the heat dissipation system of the hair dryer described in the present application;

[0054] Figure 4 It is Figure 2 It is a partial enlarged view of A in FIG. 8;

[0055] Figure 5 It is Figure 2 It is a sectional view of A-A and a schematic diagram of the gas flow direction of the first air duct and the third air duct;

[0056] Figure 6 It is Figure 2 It is a sectional view of B-B and a schematic diagram of the gas flow direction of the second air duct;

[0057] Figure 7 It is Figure 2 It is a sectional view of C-C and a schematic diagram of the gas flow direction of the third air duct;

[0058] Figure 8 It is Figure 7 It is a partial enlarged view of D in FIG. 9;

[0059] Figure 9 It is an exploded schematic diagram of the shell, the fan assembly and the air inlet element of the heat dissipation system of the hair dryer described in the present application;

[0060] Figure 10 It is an exploded schematic diagram of the shell, the barrel, the fan assembly and the air inlet element of the heat dissipation system of the hair dryer described in the present application;

[0061] Figure 11Fig. 1 is a perspective view of the hair dryer according to the present application;

[0062] Figure 12 Fig. 2 is a perspective view of the hair dryer according to the present application;

[0063] Figure 13 Fig. 3 is a sectional view of the hair dryer according to the present application; Figure 12

[0064] Figure 14 Fig. 4 is a perspective view of the fan assembly according to the present application;

[0065] Figure 15 Fig. 5 is a perspective view of the fan assembly according to the present application;

[0066] Figure 16 Fig. 6 is a sectional view of the fan assembly according to the present application;

[0067] Figure 17 Fig. 7 is a perspective view of the heating element according to the present application;

[0068] List of main elements

[0069] 100, heat dissipation system of the hair dryer;

[0070] 10, housing; 1020, annular cavity;

[0071] 20, barrel; 21, second mounting cavity;

[0072] 30, fan assembly; 31, rotating shaft; 32, rotor; 33, fan blade; 34, first air guide; 341, first air guide blade; 342, flow guide hole; 35, second air guide; 351, second air guide blade; 36, heating element; 361, mica plate; 362, first heat insulation layer; 363, second heat insulation layer;

[0073] 40, handle; 41, first air inlet; 42, first mounting cavity; 43, circuit board;

[0074] 50, air inlet; 51, second air inlet;

[0075] 60, first air duct; 61, first air outlet;

[0076] 70, second air duct; 71, second air outlet;

[0077] 80, third air duct; 81, placement cavity; 82, heat dissipation cavity; 83, third air outlet;

[0078] 90, air outlet; F1, axial direction of the barrel; DETAILED DESCRIPTION

[0079] ​Clearly, only some of the embodiments of the application are described herein and all modifications that come within the scope of the application are reserved. Various embodiments of the application will be described in detail with reference to drawings, wherein:

[0080] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components can be present. When a component is referred to as being "positioned on" another component, it can be directly positioned on the other component or intervening components can be present. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "rear", and the like as can be used herein are used for illustration only and are similarly not limiting.

[0081] Some embodiments of the application will be described in detail with reference to the drawings, wherein:

[0082] Please refer to Figures 1-17 The heat dissipation system 100 of the hair dryer according to the embodiments of the application comprises a housing 10, a barrel 20 sleeved in the housing 10, a fan assembly 30 installed in the barrel 20, and a handle 40 connected perpendicularly 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 the hair dryer is provided with a first air outlet 61, a second air outlet 71 and a third air outlet 83 along the axis of the barrel 20, which are arranged opposite to the second air inlet 51 respectively. The first air inlet 41 forms a first airflow, and the second air inlet 51 forms a second airflow and a third airflow. The first airflow flows through the handle 40, the space between the housing 10 and the barrel 20 and the first air outlet 61 in sequence, the second airflow flows through the fan assembly 30, the space between the barrel 20 and the fan assembly 30 and the second air outlet 71 in sequence, and the third airflow flows through the fan assembly 30 and the third air outlet 83 in sequence.

[0083] Specifically, the housing 10 serves as the outer protective structure of the heat dissipation system 100 of the hair dryer, and provides the overall shape and support. The barrel 20 is sleeved in the housing 10, and forms the main part of the heat dissipation system 100 of the hair dryer together with the housing 10. The fan assembly 30 is installed in the barrel 20, and is the core component for generating airflow. The handle 40 is connected perpendicularly to the housing 10, and is convenient for the user to hold and operate. The first air inlet 41 is provided on the handle 40, and forms the first airflow. The second air inlet 51 is provided on the barrel 20, and forms the second airflow and the third airflow.

[0084] The first air outlet 61, the second air outlet 71 and the third air outlet 83 are arranged along the axis of the barrel 20. The first air outlet 61, the second air outlet 71 and the third air outlet 83 are arranged opposite to the second air inlet 51, and are used to output air flow.

[0085] The first air flow enters the first installation cavity 42 in the handle 40 from the first air inlet 41, flows through the annular cavity 1020 between the shell 10 and the barrel 20, and is finally output from the first air outlet 61.

[0086] The handle 40 and the shell 10 are fixed together by a vertical connection structure (such as a bolt, a buckle, etc.). The barrel 20 and the shell 10 are tightly fitted by sleeving, abutting, buckling or other connection methods. The fan assembly 30 and the barrel 20 are fixed in the barrel 20 by a mounting structure (such as a bracket, a fixing piece, etc.).

[0087] When the heat dissipation system 100 of the hair dryer works, the first air inlet 41 inhales external air, and the external air becomes the first air flow after entering the first air duct 60. The first air flow flows through the handle 40 to dissipate heat from the circuit board 43 and other components in the handle 40. Then, the first air flow flows through the annular cavity 1020 between the shell 10 and the barrel 20 to dissipate heat from the shell 10. Finally, the first air flow is output from the first air outlet 61.

[0088] The second air inlet 51 inhales external air, and a part of the external air becomes the second air flow after entering the second air duct 70. The second air flow flows through the second installation cavity 21 between the fan assembly 30 and the barrel 20 to dissipate heat from the outer surface layer (such as the outer surface of the fan blade, the first air guide 34, the second air guide 35 and the mica plate 361) of the fan assembly 30. When the heating wire wound around the mica plate 361 is electrified, the second air flow flows through the heating wire to form warm air. Finally, the second air flow is output from the second air outlet 71. Finally, the second air flow is output from the second air outlet 71 to form a straight-in straight-out air flow path.

[0089] The second air inlet 51 inhales external air, and another part of the external air becomes the third air flow after entering the third air duct 80. The third air flow enters the guide hole 342 of the first air guide 34 through the gap between the fan blades, directly flows through the inside of the fan assembly 30 to dissipate heat from the internal structure (such as the heating source such as the coil) of the fan assembly 30, and is then output from the third air outlet 83. The third air flow directly flows through the inside of the fan assembly 30 to dissipate heat from the heating source (such as the coil wound on the rotor 32) of the fan assembly 30. The third air flow after heat dissipation is output from the third air outlet 83.

[0090] By setting two air inlets and three air outlets, multiple airflow paths are formed, improving the heat dissipation effect of the hair dryer's heat dissipation system 100. The first airflow cools the handle 40 shell, the circuit board 43 inside the handle 40, and the shell 10, reducing the overall temperature. The second airflow cools the outer layer of the fan assembly 30 inside the barrel 20 and the mica plate 361, while forming warm air output. The third airflow cools the inside of the fan assembly 30, especially the heat source, improving the stability and life of the fan assembly 30.

[0091] The optimized heat dissipation structure enables the fan assembly 30 to operate stably at a higher temperature, thereby improving the power of the hair dryer's heat dissipation system 100. It reduces the power drop and failure rate caused by overheating, and improves the reliability and durability of the product.

[0092] In a specific embodiment, the hair dryer's heat dissipation system 100 further includes a first air duct 60. The first air duct 60 includes the first air inlet 41, a first mounting cavity 42, an annular cavity 1020, and the first air outlet 61. The first mounting cavity 42 is opened in the handle 40, and the first mounting cavity 42 is in communication with the first air inlet 41, and the circuit board 43 is installed in the first mounting cavity 42. The annular cavity 1020 is formed between the shell 10 and the barrel 20. The end of the first mounting cavity 42 away from the first air inlet 41 is in communication with the annular cavity 1020, and the annular cavity 1020 is in communication with the first air outlet 61. The first air outlet 61 is formed by the shell 10 and the barrel 20, and the second air inlet 51 and the first air outlet 61 are located at both ends of the axis of the barrel 20. The first airflow flows through the first air inlet 41, the first mounting cavity 42, the circuit board 43, the annular cavity 1020, and the first air outlet 61 in sequence. The first airflow flows to reduce the heat of the circuit board 43 and the shell 10.

[0093] Specifically, the first air inlet 41 is located on the handle 40 and is the entrance for external air, and the first air inlet 41 is provided with a filter screen for filtering dust, hair, etc. The first mounting cavity 42 is opened inside the handle 40 and is in direct communication with the first air inlet 41 for mounting the circuit board 43. The annular cavity 1020 is formed between the shell 10 and the barrel 20 and is one of the main channels for the second airflow. The first air outlet 61 is formed by the gap between the shell 10 and the barrel 20 and is the outlet for the airflow.

[0094] The first air inlet 41 is directly communicated with the first mounting cavity 42, ensuring that the air flow smoothly enters the inside of the handle 40. The first mounting cavity 42 is communicated with the annular cavity 1020 through the connecting structure of the handle 40 and the shell 10 and the barrel 20. After the air flow flows out of the first mounting cavity 42, it enters the annular cavity 1020. The annular cavity 1020 is formed around the barrel 20, and its open end is connected with the first air outlet 61. After the air flow flows in the annular cavity 1020, it is discharged from the first air outlet 61.

[0095] The circuit board 43 is installed in the first mounting cavity 42 and is directly exposed to the first air flow, facilitating heat dissipation.

[0096] The second air inlet 51 and the first air outlet 61 are respectively located at both ends of the axis of the barrel 20. This design helps to form a convection of air flow and improve the heat dissipation efficiency.

[0097] Through the first air duct 60, the air flow can directly flow through the circuit board 43, effectively taking away the heat on the circuit board 43, reducing the working temperature of the circuit board 43, and improving the stability and life of the circuit board 43. At the same time, when the air flow flows in the annular cavity 1020, it dissipates heat to the shell 10, further reducing the overall temperature of the heat dissipation system 100 of the hair dryer.

[0098] The high-efficiency heat dissipation performance ensures the stability and safety of the heat dissipation system 100 of the hair dryer during long-time use. At the same time, the reduced temperature of the heat dissipation system 100 of the hair dryer also reduces the discomfort that the user may feel during use, improving the user experience.

[0099] In a specific embodiment, the heat dissipation system 100 of the hair dryer further comprises a second air duct 70. The second air duct 70 comprises a second air inlet 51, a second mounting cavity 21, and a second air outlet 71. The heat dissipation system 100 of the hair dryer comprises an air inlet piece 50 sleeved with one end of the shell 10, and the air inlet piece 50 is provided with the second air inlet 51. The second air outlet 71 is provided on the barrel 20, and the second air outlet 71 is located at one end away from the second air inlet 51. The second mounting cavity 21 is provided along the axial direction F1 of the barrel, and the second air inlet 51 and the second air outlet 71 are respectively communicated with both ends of the second mounting cavity 21. The second air flow sequentially flows through the second air inlet 51, the second mounting cavity 21, and the second air outlet 71, and when the second air flow flows through the second mounting cavity 21, the heat of the fan assembly 30 installed in the second mounting cavity 21 is reduced.

[0100] Specifically, the second air inlet 51 is provided on the air inlet piece 50 and is connected with one end of the shell 10, which is the inlet of the second air flow and the third air flow. The second air inlet 51 is provided with at least double-layer filter screens.

[0101] The second installation cavity 21 is opened along the axial direction F1 of the cylinder body, and serves as an installation space of the fan assembly 30 and a main passage of the airflow.

[0102] The second air outlet 71 is arranged on the cylinder body 20 and is located at an end away from the second air inlet 51, serving as an outlet of the second airflow.

[0103] The air inlet piece 50 is connected to one end of the shell 10, ensuring smooth communication between the second air inlet 51 and the second installation cavity 21.

[0104] The two ends of the second installation cavity 21 are in communication with the second air inlet 51 and the second air outlet 71 respectively, forming a complete airflow passage.

[0105] The fan assembly 30 is installed in the second installation cavity 21 and directly exposed to the second airflow, facilitating heat dissipation. The second air outlet 71 is located at an end away from the second air inlet 51, which helps to form a convection of the airflow and improve the heat dissipation efficiency.

[0106] External air enters the second air inlet 51 from the air inlet piece 50 and then enters the second installation cavity 21. In the second installation cavity 21, the second airflow directly contacts the fan assembly 30 and carries away the heat on the fan assembly 30. Then, the airflow is discharged from the second air outlet 71, forming a complete heat dissipation path.

[0107] In one embodiment, the fan assembly 30 is coaxially arranged with the cylinder body 20, and the fan assembly 30 includes a rotating shaft 31, a rotor 32, a fan blade 33, a first air guide piece 34, and a second air guide piece 35. The rotating shaft 31 is located at the center of the cylinder body 20, the rotor 32 is provided with a coil, the fan blade 33, the first air guide piece 34, and the rotor 32 are sequentially and adjacently arranged on the rotating shaft 31 along the axial direction F1 of the cylinder body, and the fan blade 33 is located at an end close to the second air inlet 51. The second installation cavity 21 is formed by the second air guide piece 35 and the cylinder body 20. The second air guide piece 35 is arranged on the first air guide piece 34. The second air guide piece 35 is connected to the first air guide piece 34. The second air guide piece 35 is located at an end away from the fan blade 33. The rotor 32 is located in the second air guide piece 35. The fan blade 33 generates a second airflow, which is a rotating airflow. The second airflow flows through the first air guide piece 34, reducing the heat of the first air guide piece 34 and performing the first rectification. The second airflow flows through the second air guide piece 35, reducing the heat of the second air guide piece 35 and performing the second rectification. After the second rectification, the second airflow is a straight-in straight-out airflow.

[0108] Specifically, the rotating shaft 31 is located at the center of the entire cylinder body 20 and is the "backbone" of the fan assembly 30.

[0109] The rotation shaft 31 is not only the common support structure of the fan blade 33, the rotor 32, the first air guide 34 and the second air guide 35, but also the center point of their rotation. The fan blade 33, the rotor 32, the first air guide 34, the second air guide 35 and the mica plate 361 all rotate around the rotation shaft 31. The rotation shaft 31 is usually made of high-strength, wear-resistant materials to ensure that it can withstand various forces and stresses during the operation of the fan.

[0110] The rotor 32 is arranged around the rotation shaft 31 between the fan blade 33 and the first air guide 34. The rotor 32 is the power source of the fan assembly 30. When the coil is energized, the rotor 32 generates a magnetic field, which interacts with the external fixed magnetic field to generate a rotating force, driving the rotation shaft 31 to rotate. The rotor 32 is usually made of magnetic materials such as iron, nickel or their alloys to ensure good magnetic properties and mechanical strength.

[0111] The fan blade 33 is located at one end close to the second air inlet 51, immediately after the rotation shaft 31. When the rotation shaft 31 rotates, the fan blade 33 also rotates, thereby generating a rotating air flow (i.e. the second air flow). This air flow is the main source of air blown out by the heat dissipation system 100 of the hair dryer. The design of the fan blade 33 usually includes multiple blades, the shape, number and angle of which are carefully calculated to ensure the maximum efficiency of the air flow.

[0112] The first air guide 34 is located between the fan blade 33 and the rotor 32, usually immediately after the fan blade 33. The main function of the first air guide 34 is to preliminarily straighten and dissipate heat. It can adjust the rotating air flow generated by the fan blade 33 to a certain extent, making it more stable, and at the same time helping to dissipate the heat generated by the fan assembly 30 during operation. The first air guide 34 usually has a streamlined design to reduce air resistance.

[0113] The second air guide 35 is connected with the first air guide 34 and located at the end away from the fan blade 33, one end of the rotor 32 extends into the second air guide 35, and the other end of the rotor 32 extends into the heat generating member 36. The main function of the second air guide 35 is to further straighten and dissipate heat. It can further optimize the air flow after the adjustment of the first air guide 34, making it more stable and straight in and out, and continuing to dissipate the heat of the fan assembly 30. At the same time, the straight in and out second air flow also reduces the noise in the cylinder.

[0114] The design of the second air guide 35 is usually more complex because it needs to consider the straightening effect. It can include multiple channels, heat dissipation fins and / or other heat dissipation structures to ensure the best straightening and heat dissipation effect.

[0115] The second installation cavity 21 is formed by the second air guide 35 and the cylinder 20, serving as the main passage for the second airflow. The design of this cavity generally takes into account the flowability of the airflow and the heat dissipation performance to ensure that the airflow can pass smoothly and dissipate heat.

[0116] The first air guide 34 and the second air guide 35 are integrated through a connection structure such as bolts, welding, or other mechanical connections, forming a continuous flow and heat dissipation channel. This integrated design not only improves the overall performance of the fan assembly 30, but also simplifies the installation and maintenance process.

[0117] In a specific embodiment, the fan assembly 30 further includes a heating element 36, which is sleeved in the cylinder 20, and the heating element 36 is connected with the first air guide 34, the second air guide 35, and the rotor 32 respectively. The heating element 36 includes a mica plate 361, and a plurality of mica plates 361 are uniformly arranged around the rotating shaft 31. One of the mica plates 361 is provided with a heating wire. When the second airflow passes through the mica plate 361, the mica plate 361 is cooled. When the second airflow passes through the heating wire, warm air is formed.

[0118] Specifically, the heating element 36 serves as the heating element of the heat dissipation system 100 of the hair dryer. The heating element 36 is sleeved in the cylinder 20 and connected with the first air guide 34, the second air guide 35, and the rotor 32. This ensures that the heating element 36 can be stably fixed inside the fan assembly 30, and facilitates heat transfer and heat dissipation.

[0119] A plurality of mica plates 361 are uniformly arranged around the rotating shaft 31. The heating wire is powered to generate heat, and the heat capacity ratio of the mica plate 361 is greater than that of the heating wire. The mica plate 361 is used for heat insulation to prevent heat from being directly transmitted to other components.

[0120] Each mica plate 361 is provided with a heating wire around it. The heating wire serves as a heat source. When the heating wire is powered, it generates heat. After the second airflow passes through the heating wire, warm air is formed.

[0121] When the second airflow passes through the fan assembly 30, it first passes through the mica plate 361 to dissipate heat. Due to the good heat insulation performance of the mica plate 361, the mica plate 361 can effectively slow down the release speed of heat, so that the second airflow can absorb enough heat when passing through the heating wire to form warm air. At the same time, the second airflow also carries away part of the heat on the mica plate 361 and the heating wire, playing a role in heat dissipation.

[0122] Due to the heat insulation performance of the mica plate 361, heat can be slowly and uniformly released to the second airflow, making the formation of warm air more stable and comfortable. This design avoids the sudden release of heat and the sharp change of temperature, improving the user experience.

[0123] In a specific embodiment, the first air guide 34 is composed of a plurality of first air guide blades 341, the plurality of first air guide blades 341 are arranged around the rotating shaft 31, the second air guide 35 is composed of a plurality of second air guide blades 35133, the plurality of second air guide blades 35133 are arranged around the rotating shaft 31, the second air guide blades 35133 are connected to the tail ends of the first air guide blades 341, and the mica plate 361 is connected to the tail ends of the second air guide blades 35133.

[0124] The number of the first air guide blades 341 is denoted as A, the number of the second air guide blades 35133 is denoted as S, and the number of the mica plates 361 is denoted as F, which satisfy the following relationship:

[0125] A > S;

[0126] S = F;

[0127] Among them, one mica plate 361 is connected to the tail end of one air guide blade 33.

[0128] The first air guide blades 341 and the rotating shaft 31 form a first included angle along the axial direction F1 of the cylinder, the first included angle is denoted as U, the second air guide blades 35133 and the rotating shaft 31 form a second included angle along the axial direction F1 of the cylinder, the second included angle is denoted as Q, and the mica plates 361 and the rotating shaft 31 form a third included angle along the axial direction F1 of the cylinder, the third included angle is denoted as W, which satisfy the following relationship:

[0129] W = 0°;

[0130] W < Q < U;

[0131] U ≤ 60°;

[0132] Q > 10°.

[0133] Specifically, the first air guide 34 is composed of a plurality of first air guide blades 341, the first air guide blades 341 are arranged around the rotating shaft 31 to form a preliminary flow regulating structure. The main function of the first air guide blades 341 is to first regulate the second airflow generated by the air guide blades 33 inhaling external air, so that the second airflow becomes stable and orderly from disorderly.

[0134] The second air guide 35 is composed of a plurality of second air guide blades 35133, the second air guide blades 35133 are also arranged around the rotating shaft 31 and connected to the tail ends of the first air guide blades 341, and are used to receive the second airflow subjected to the first regulation. The second air guide blades 35133 perform the second regulation on the second airflow to ensure that the second airflow subjected to the second regulation is straight.

[0135] The second airflow flows through the gaps between adjacent first guide vanes 341 and is subjected to a first rectification by the inclined curvature of the first guide vanes 341. The first rectification is based on the inclined curvature of the first guide vanes 341, which is defined by the angle between the first guide vanes 341 and the rotating shaft 31. This angle is referred to as the first angle, denoted as U.

[0136] The second airflow flows through the gaps between adjacent second guide vanes 35133 and is subjected to a second rectification by the inclined curvature of the second guide vanes 35133. The second rectification is based on the inclined curvature of the second guide vanes 35133, which is defined by the angle between the second guide vanes 35133 and the rotating shaft 31. This angle is referred to as the second angle, denoted as Q.

[0137] Each mica plate 361 is connected to the tail end of a second guide vane 35133, and the gaps between adjacent mica plates 361 are connected to the gaps between adjacent second guide vanes 35133. This arrangement allows the second airflow to be directly received after the second rectification, reducing the loss of the second airflow during the rectification process. The second airflow is then directly applied to the mica plates 361, which can either dissipate heat or pass through the heated wires to generate warm air.

[0138] W < Q < U, indicating that the second airflow is gradually rectified by the first guide vanes 34, the second guide vanes 35, and the mica plates 361, transforming the rotating second airflow into a straight second airflow.

[0139] The first angle (U ≤ 60°) is greater than the second angle (Q > 10°), which helps to capture the rotating airflow generated by the fan blades 33 and perform preliminary rectification. Due to the existence of the angle U, the first guide vanes 341 can guide the airflow to flow along the inclined surface, thereby reducing the rotational component of the airflow and increasing its axial component.

[0140] The angle Q between the second guide vanes 35133 and the rotating shaft 31 (Q > 10° and Q < U) is smaller, which further promotes the rectification process of the airflow. Compared with the first guide vanes 341, the second guide vanes 35133 fine-tune the airflow at a smaller angle, making it closer to a straight flow state. Through the gaps between adjacent second guide vanes 35133, the airflow can smoothly flow out, reducing the formation of turbulence and vortex.

[0141] Each mica plate 361 is connected to the tail end of a second guide vane 35133, which ensures that the airflow after the second rectification can directly act on the mica plates 361. When the airflow flows through the mica plates 361, it not only carries away the heat on the mica plates 361 but also further rectifies the airflow into a straight second airflow.

[0142] When the heating wire on the mica plate 361 is electrified, the airflow will also absorb heat while flowing through, forming warm air while maintaining a smooth output of airflow.

[0143] The first and second air guide leaves 341 and 35133 together turn the rotating air duct into a straight air duct, ensuring that the airflow remains straight while flowing through the entire fan assembly 30. The mica plate 361 is connected to the second air guide leaf 35133 to ensure that heat can be efficiently transferred to the airflow, and the heat insulation performance of the mica plate 361 also prevents excessive heating of other parts of the fan assembly 30.

[0144] Through the airflow straightening experiment, the influence of air guide plates with different angles on the straightening effect of airflow is verified. The experimental principle is based on the basic principle of airflow straightening, that is, by guiding and adjusting the flow of gas to reduce turbulence and resistance, improve the stability of the gas in the channel. In the experiment, we use two air guide plates with different angles (first and second air guide leaves), representing different stages of straightening. By measuring the airflow speed after straightening, we can evaluate the straightening effect.

[0145] Experimental materials:

[0146] Fan: as the source of airflow, providing stable airflow.

[0147] Air guide plate: two air guide plates with different angles, used for the first and second stages of straightening.

[0148] Anemometer: used to measure the airflow speed after straightening.

[0149] Angle measuring instrument: used to accurately measure the angle of the air guide plate.

[0150] Experimental steps:

[0151] Place the fan at one end of the experimental table and fix it.

[0152] Fix the first air guide leaf (angle U) at the outlet of the fan to ensure smooth airflow.

[0153] Fix the second air guide leaf (angle Q) at a certain distance behind the first air guide leaf to ensure that the airflow can pass through twice.

[0154] Set up the anemometer behind the second air guide leaf to measure the airflow speed after straightening.

[0155] Turn on the fan and let the airflow pass through the air guide plates for straightening, and record the readings on the anemometer.

[0156] Repeat the experiment, change the angles of U and Q, and observe and record the airflow speed after straightening at different angles.

[0157] Experimental data

[0158]

[0159] Experimental results and analysis

[0160] From the experimental data, when the first guide vane angle U and the second guide vane angle Q are moderate (such as U = 45°, Q = 20°), the airflow speed after rectification is relatively stable and high.

[0161] When U is greater than 60° or Q = 10°, the rectification effect may be affected, resulting in a decrease or instability of the airflow speed.

[0162] In a specific embodiment, the heating element 36 further comprises: a first heat insulation layer 362 and a second heat insulation layer 363 sleeved with the first heat insulation layer 362, the mica plate 361 is connected with the first heat insulation layer 362, and the rotor 32 extends into the heating element 36.

[0163] Specifically, the first heat insulation layer 362 and the second heat insulation layer 363 are placed in the heating wire of the second mounting cavity 21 to form overheating of the rotor 32 in the heating element 36 (the heat dissipation cavity 82), and the heat is insulated. And the heat dissipation cavity 82 is taken away by the third airflow, avoiding the temperature of the heat dissipation cavity 82 being too high and burning the rotor 32.

[0164] The first heat insulation layer 362 and the second heat insulation layer 363 are sleeved with a gap, which further increases the conduction area of the incremental heat.

[0165] The air inlet amount of the heat dissipation system 100 of the hair dryer is less than the air outlet amount. This design makes the airflow stay longer inside the heat dissipation system 100 of the hair dryer (including inside the handle 40, inside the annular cavity 1020, inside the second mounting cavity 21 and the fan assembly 30). The prolonged airflow residence time helps to fully take away the heat generated by the heating element 36 and other components, thereby improving the heat dissipation efficiency.

[0166] When the heat dissipation system 100 of the hair dryer works, the airflow enters from the air inlet, passes through a series of channels (such as inside the handle 40, inside the annular cavity 1020, etc.), and enters the heating element 36 area. In the heating element 36 area, the airflow contacts the mica plate 361 and the first and second heat insulation layers 363, taking away the heat transferred by them. Because the air inlet amount is less than the air outlet amount, the airflow forms a "retention" effect inside the heat dissipation system 100 of the hair dryer. This effect makes the airflow more fully contact with each component, thereby more effectively taking away the heat. Finally, the airflow after heating and heat dissipation is sprayed out of the air outlet of the heat dissipation system 100 of the hair dryer, providing hot air or warm air for the user.

[0167] In a specific embodiment, the fan assembly 30 includes a third air duct 80. The third air duct 80 includes a second air inlet, a second mounting cavity 21, a guide hole 342, a placement cavity 81, a heat dissipation cavity 82, and a third air outlet 83. The first air guide 34 is provided with the guide hole 342, which is arranged along the axial direction of the cylinder body 20, and a plurality of guide holes 342 are arranged around the rotating shaft 31. The guide hole 342 communicates with the second mounting cavity 21. The placement cavity 81 is the gap between the coils of the rotor 32, and the placement cavity 81 communicates with the guide hole 342. The placement cavity 81 is located at one end away from the second air inlet. The heat dissipation cavity 82 is formed by the rotor 32 and the second heat insulation layer 363, and the heat dissipation cavity 82 communicates with the placement cavity 81. The rotor 32 and the connecting shaft extend into the heat dissipation cavity 82. The heat dissipation system 100 of the blowing cylinder includes an air outlet member 90 arranged in the cylinder body 20, and the third air outlet 83 is located between the air outlet member 90 and the cylinder body 20.

[0168] Specifically, the fan assembly 30 is embedded with a third air duct 80, which is a key component of the air flow path.

[0169] The third air duct 80 includes a second air inlet, a second mounting cavity 21, a guide hole 342, a placement cavity 81, a heat dissipation cavity 82, and a third air outlet 83, which together constitute the flow path of air flow in the fan assembly 30.

[0170] The first air guide 34 is provided with the guide hole 342, which is arranged along the axial direction of the cylinder body 20, and a plurality of guide holes 342 are arranged around the rotating shaft 31 to ensure uniform distribution of air flow.

[0171] The guide hole 342 connects the second mounting cavity 21 with the subsequent air flow path (such as the placement cavity 81).

[0172] The placement cavity 81 is the gap between the coils of the rotor 32, and it is located at one end away from the second air inlet. This gap not only provides installation space for the coils, but also serves as part of the air flow passage, allowing air flow to pass through and carry away the heat of the coils.

[0173] The heat dissipation cavity 82 is formed by the rotor 32 and the second heat insulation layer 363, and it communicates with the placement cavity 81. The heat dissipation cavity 82 further reduces the heat of the mica plate 361 and the heating wire, and prevents the heat in the second mounting cavity 21 from entering the heat dissipation cavity 82 through the first heat insulation layer 362 and the second heat insulation layer 363. The rotor 32 and the connecting shaft extend into the heat dissipation cavity 82, which helps to transfer heat from the inside to the external air flow.

[0174] The heat dissipation system 100 of the hair dryer further comprises an air outlet piece 90, which is arranged in the barrel 20 and between the air inlet piece 50 and the barrel 20. A third air outlet 83 is arranged on the air outlet piece 90 and is the last step for the air flow to leave the heat dissipation system 100 of the hair dryer.

[0175] In this way, the first air flow, the second air flow and the third air flow are generated by the air ducts with 2-in-3-out, and the heat dissipation of the heat dissipation system 100 of the hair dryer is performed. The specific heat dissipation effect is that the first air flow dissipates heat for the handle 40 shell, the circuit board 43 in the handle 40 and the shell 10.

[0176] The second air flow dissipates heat for the outer layer of the fan assembly 30 and the mica plate 361 in the barrel 20. When the heating wire wound around the mica plate 361 is powered, the second air flow flows through the heating wire, and the second air flow forms warm air.

[0177] The third air flow dissipates heat for the inside of the fan assembly 30, and especially for the heat source (the coil wound around the rotor 32) of the fan assembly 30.

[0178] Then, in order to reduce the installation space of the fan assembly 30 and the heating piece 36, the rotor 32 is partially inserted into the heating piece 36. In order to avoid the heat generated by the heating piece 36 from affecting the overheating of the rotor 32, the third air flow flows through the heating piece 36 to take away the heat.

[0179] Then, in order to reduce the influence of the heat of the mica plate 361 on the rotor 32, a double-layer heat insulation layer is arranged to reduce the damage of the heat generated by the mica plate 361 and the heating wire to the rotor 32. The third air flow is also a straight-in straight-out air flow, which can further reduce the noise inside the fan assembly 30.

[0180] The above only describes the embodiments of the present application, and it should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present application, and these improvements are within the protection scope of the present application.

Claims

1. A heat dissipation system for a hair dryer, characterized in that, include: The outer casing, the cylinder fitted inside the outer casing, the fan assembly installed inside the cylinder, and the handle vertically connected to the outer casing; The handle has a first air inlet, the cylinder has a second air inlet, and the heat dissipation system of the blower has a first air outlet, a second air outlet, and a third air outlet respectively arranged opposite to the second air inlet along the axis of the cylinder. Furthermore, the first air inlet generates a first airflow, and the second air inlet generates a second airflow and a third airflow; The first airflow flows sequentially through the inside of the handle, between the outer shell and the cylinder, and the first air outlet; the second airflow flows sequentially between the fan assembly and the cylinder, and the second air outlet; the third airflow flows sequentially through the inside of the fan assembly and the third air outlet. The heat dissipation system of the hair dryer further includes a first air duct, which comprises a first air inlet, a first mounting cavity, an annular cavity, and a first air outlet. The first mounting cavity is located within the handle and communicates with the first air inlet. A circuit board is mounted within the first mounting cavity. The annular cavity is formed between the outer shell and the cylindrical body. One end of the first mounting cavity opposite to the first air inlet communicates with the annular cavity, and the annular cavity communicates with the first air outlet. The first air outlet is formed by the outer shell and the cylindrical body. The second air inlet and the first air outlet are located at opposite ends of the axis of the cylindrical body. The first airflow flows sequentially through the first air inlet, the first mounting cavity, the circuit board, the annular cavity, and the first air outlet, thereby reducing the heat of the circuit board and the outer shell. The fan assembly includes a rotating shaft, a rotor, fan blades, a first air guide, and a second air guide; The rotating shaft is located at the center of the cylinder, the rotor is wound with a coil, and the fan blade, the first air guide and the rotor are sequentially and adjacently sleeved on the rotating shaft along the axial direction of the cylinder, with the fan blade located at one end near the second air inlet; The second air guide is sleeved on the first air guide, the second air guide is connected to the first air guide, the second air guide is located at the end opposite to the fan blade, and the rotor is located inside the second air guide; The fan blade generates a second airflow, which is a rotating airflow. The second airflow flows through the first air guide, reducing the heat of the first air guide and performing the first rectification. The second airflow passes through the second air guide, reducing the heat of the second air guide and undergoing a second rectification. After the second rectification, the second airflow is a straight-in-straight-out airflow. The heat dissipation system of the blower also includes a second air duct, which includes a second air inlet, a second mounting cavity, and a second air outlet. The second mounting cavity is opened along the axial direction of the cylinder, and the second air inlet and the second air outlet are respectively connected to the two ends of the second mounting cavity. The fan assembly is located in the second mounting cavity, which is formed by connecting the second air guide and the cylinder. The fan assembly includes a third air duct, which includes: a second air inlet, a second mounting cavity, a guide hole, a placement cavity, a heat dissipation cavity, and a third air outlet. The first air guide component has a guide hole, which is arranged along the axial direction of the cylinder. Multiple guide holes surround the rotating shaft and are connected to the second mounting cavity.

2. The heat dissipation system for a hair dryer according to claim 1, characterized in that, The heat dissipation system of the blower includes an air inlet sleeved on one end of the outer shell, the air inlet having a second air inlet, a second air outlet being opened on the cylinder body, and the second air outlet being located at the end opposite to the second air inlet; The second airflow flows sequentially through the second air inlet, the second mounting cavity, and the second air outlet. When the second airflow flows through the second mounting cavity, it reduces the heat of the fan assembly installed in the second mounting cavity.

3. The heat dissipation system for a hair dryer according to claim 1, characterized in that, The fan assembly also includes a heating element, which is sleeved inside the cylinder and connected to the first air guide, the second air guide, and the rotor respectively. The heating element includes a mica plate, a plurality of mica plates are surrounded around the rotating shaft, and a heating wire is wound around one of the mica plates; When the second airflow passes through the mica plate, it dissipates heat from the mica plate. When the second airflow passes through the heating wire, it forms warm air.

4. The heat dissipation system for a hair dryer according to claim 3, characterized in that, The first air guide component is composed of multiple first air guide blades, which surround the rotating shaft. The second air guide component is composed of multiple second air guide blades, which surround the rotating shaft. The tail ends of the second air guide blades are connected to the tail ends of the first air guide blades. A mica plate is connected to and attached to the tail end of a second air guide blade.

5. The heat dissipation system for a hair dryer according to claim 4, characterized in that, Let A be the number of the first guide vanes, S be the number of the second guide vanes, and F be the number of mica plates, satisfying the following relationship: A > S; S = F.

6. The heat dissipation system for a hair dryer according to claim 5, characterized in that, The first guide vane and the rotating shaft form a first angle along the axial direction of the cylinder, denoted as U. The second guide vane and the rotating shaft form a second angle along the axial direction of the cylinder, denoted as Q. The mica plate and the rotating shaft form a third angle along the axial direction of the cylinder, denoted as W. The following relationship is satisfied: W=0°; W < Q < U; U≤60°; Q＞10°。 7. The heat dissipation system for a hair dryer according to claim 3, characterized in that, The heating element further includes: a first heat insulation layer and a second heat insulation layer sleeved with the first heat insulation layer, the mica plate is connected to the first heat insulation layer, and the rotor extends into the heating element.

8. The heat dissipation system for a hair dryer according to claim 7, characterized in that, The placement cavity is the gap between the rotor winding coils, the placement cavity is connected to the guide hole, and the placement cavity is located at the end away from the second air inlet; The heat dissipation cavity is formed by connecting the rotor and the second heat insulation layer. The heat dissipation cavity is connected to the placement cavity. The rotor and the connecting shaft extend into the heat dissipation cavity. The heat dissipation system of the blower includes an air outlet covered inside the body of the blower, and the third air outlet is located between the air outlet and the body of the blower.

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