Heat dissipation system of hair dryer

Abstract

The invention provides a heat dissipation system of an air blowing cylinder. The heat dissipation system comprises a shell, a cylinder body arranged in the shell in a sleeved mode, a fan assembly installed in the cylinder body and a handle perpendicularly connected with the shell. A first air inlet is formed in the handle, a second air inlet is formed in the cylinder body, and a first air outlet, a second air outlet and a third air outlet which are opposite to the second air inlet are formed in a heat dissipation system of the blowing cylinder along the axis of the cylinder body. A first air flow is formed at the first air inlet, and a second air flow and a third air flow are formed at the second air inlet. The first air flow sequentially flows through the interior of the handle, the space between the shell and the barrel and the first air outlet, the second air flow sequentially flows through the space between the fan assembly and the barrel and the second air outlet, and the third air flow sequentially flows through the interior of the fan assembly and the third air outlet. Through the structure, the heat dissipation structure of the heat dissipation system of the hair dryer is improved.

Description

Technical Field

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

[0002] High-speed hair dryers are currently popular among consumers for their powerful wind power, fast hair drying ability and advanced temperature control technology. They use high-performance motors to generate high-speed airflow, effectively shortening the time of drying hair, while reducing heat damage and protecting hair health. However, the fan assembly of previous high-speed hair dryers is set on the handle, and the air outlet is on the barrel. The airflow needs to be bent 90 degrees, which is prone to air volume loss.

[0003] In order to solve this problem, the existing heat dissipation system of the hair dryer, such as the Chinese patent CN117643411A, proposes to use a hair dryer with double air inlets and a fan assembly arranged in the hair dryer body. By arranging a first air inlet on the hair dryer shell and a second air inlet on the handle assembly, the first air inlet and the air outlet are straight in and out, thereby improving the blowing effect.

[0004] However, the heat dissipation system of the hair dryer is not compact enough and the heat dissipation effect of the motor is insufficient, resulting in a low power of the heat dissipation system of the hair dryer. Therefore, a heat dissipation system of the hair dryer is needed that can improve the heat dissipation effect and thus increase the power. Summary of the invention

[0005] In view of this, it is necessary to provide a heat dissipation system for a hair dryer which can improve the heat dissipation effect and thus increase the power of the heat dissipation system of the hair dryer to solve the above problems.

[0006] The embodiment of the present application provides a heat dissipation system for a hair dryer, comprising a housing, a barrel sleeved in the housing, a fan assembly installed in the barrel, and a handle vertically connected to the housing;

[0007] The handle is provided with a first air inlet, the barrel is provided with a second air inlet, and the heat dissipation system of the hair dryer is provided with 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 barrel;

[0008] The first air inlet forms a first airflow, and the second air inlet forms a second airflow and a third airflow;

[0009] The first airflow flows sequentially through the handle, between the outer shell and the cylinder, and the first air outlet; the second airflow flows sequentially through the fan assembly and the cylinder, and the second air outlet; and the third airflow flows sequentially through the fan assembly and the third air outlet.

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

[0011] The first installation cavity is opened in the handle, and the first installation cavity is communicated with the first air inlet, and the circuit board is installed in the first installation cavity;

[0012] The annular cavity is formed between the shell and the cylinder, one end of the first installation cavity away from the first air inlet is connected to the annular cavity, and the annular cavity is connected to the first air outlet;

[0013] The first air outlet is formed by the casing and the cylinder, and the second air inlet and the first air outlet are respectively located at two ends of the axis of the cylinder;

[0014] The first airflow flows through the first air inlet, the first installation cavity, the circuit board, the annular cavity and the first air outlet in sequence, and the first airflow circulates to reduce the heat of the circuit board and the housing.

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

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

[0017] The second installation cavity is opened along the axial direction of the cylinder, and the second air inlet and the second air outlet are respectively connected to two ends of the second installation cavity;

[0018] The second airflow flows through the second air inlet, the second installation cavity and the second air outlet in sequence. When the second airflow flows through the second installation cavity, the heat of the fan assembly installed in the second installation cavity is reduced.

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

[0020] The rotating shaft is located at the axis of the cylinder, the rotor is wound 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 axial direction of the cylinder, and the fan blade is located at one end close to the second air inlet;

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

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

[0023] The fan blade generates a second airflow, which is a rotating airflow. The second airflow flows through the first air guide member to reduce the heat of the first air guide member and perform a first rectification.

[0024] The second airflow flows through the second air guide member, reduces the heat of the second air guide member and performs a second rectification. After the second rectification, the second airflow is a straight-in and straight-out airflow.

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

[0026] The heating element comprises a mica plate, a plurality of the mica plates surround the rotating shaft, and a heating wire is wound around one of the mica plates;

[0027] When the second airflow flows through the mica board, the mica board is cooled;

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

[0029] In at least one embodiment of the present application, the first air guide member is composed of a plurality of first air guide blades, and the plurality of first air guide blades are surrounded by the rotating shaft. The second air guide member is composed of a plurality of second air guide blades, and the plurality of second air guide blades are surrounded by the rotating shaft. The second air guide blade is located at the tail end of the first air guide blade, and a mica board is connected and fitted with a second air guide blade.

[0030] In at least one embodiment of the present application, the number of the first guide blades is recorded as A, the number of the second guide blades is recorded as S, and the number of the mica boards is recorded as F, satisfying the relationship:

[0031] A>S;

[0032] S = F;

[0033] Wherein, one of the mica plates is connected to the tail end of one of the air guide blades.

[0034] In at least one embodiment of the present application, the first guide vane and the rotating shaft form a first angle along the axial direction of the cylinder, the first angle is recorded as U, the second guide vane and the rotating shaft form a second angle along the axial direction of the cylinder, the second angle is recorded as Q, and the mica board and the rotating shaft form a third angle along the axial direction of the cylinder, the second angle is recorded as Q, satisfying the relationship:

[0035] W = 0°;

[0036] W<Q<U;

[0037] U≤60°;

[0038] Q>10°.

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

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

[0041] The first air guide member is provided with the guide hole, the guide hole is arranged along the axial direction of the cylinder, a plurality of the guide holes surround the rotating shaft, and the guide hole is connected to the second installation cavity;

[0042] The placement cavity is the gap between the coils wound around the rotor, the placement cavity is communicated with the 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 connecting the rotor and the second heat insulation layer, the heat dissipation cavity is communicated with the placement cavity, and 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 covered in the barrel body, and the third air outlet is located between the air inlet member and the barrel body.

[0045] The beneficial effects of the heat dissipation system of the hair dryer provided above are as follows:

[0046] The first airflow, the second airflow and the third airflow are generated by setting a 2-inlet and 3-outlet air duct to dissipate heat of the heat dissipation system of the hair dryer. Specifically, the first airflow dissipates heat to the handle housing, the circuit board in the handle and the outer shell;

[0047] The second airflow dissipates heat from the outer surface layer of the fan assembly and the mica board in the cylinder. When the heating wire wound around the mica board is energized, the second airflow flows through the heating wire and forms warm air.

[0048] The third airflow dissipates heat inside the fan assembly, especially at the heat source of the fan assembly (the coil wound on the rotor).

[0049] Then, in order to reduce the installation space between the fan assembly and the heating element, the rotor is partially extended into the heating element. In order to prevent the heat generated by the heating element from affecting the overheating of the rotor, the third airflow flows through the heating element to take away the heat;

[0050] Then, in order to reduce the impact of the heat from the mica board on the rotor, a double-layer insulation layer is provided to reduce the damage to the rotor caused by the heat generated by the mica board and the heating wire. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0054] Figure 4 for Figure 2 A partial enlarged view of the middle A;

[0055] Figure 5 for Figure 2 A cross-sectional view of the middle BB and a schematic diagram of the gas flow directions of the first and third air ducts;

[0056] Figure 6 for Figure 2 A cross-sectional view of the middle BB and a schematic diagram of the gas flow direction of the second air duct;

[0057] Figure 7 for Figure 2 The cross-sectional view of the CC and the schematic diagram of the gas flow direction of the third air duct;

[0058] Figure 8 for Figure 7 A partial enlarged view of point D in the middle;

[0059] Fig. 9 This is an exploded schematic diagram of the housing, the fan assembly and the air inlet member of the heat dissipation system of the hair dryer described in the present application;

[0060] Fig.10 This is an exploded schematic diagram of the housing, the barrel, the fan assembly and the air inlet member of the heat dissipation system of the hair dryer described in the present application;

[0061] Fig.11This is a three-dimensional front exploded schematic diagram of the entire cooling system of the hair dryer described in the present application;

[0062] Fig.12 It is a three-dimensional rear exploded schematic diagram of the entire cooling system of the hair dryer described in the present application;

[0063] Fig.13 for Fig.12 A cross-sectional view of

[0064] Fig.14 A top perspective schematic diagram of the fan assembly described in this application;

[0065] Fig.15 A bottom-up stereoscopic schematic diagram of the fan assembly described in the present application;

[0066] Fig.16 This is a schematic diagram of the internal structure of the second air guide member of the present application;

[0067] Fig.17 It is a three-dimensional schematic diagram of the heating element described in this application;

[0068] Main component symbols

[0069] 100. Heat dissipation system of hair dryer;

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

[0071] 20. Cylinder body; 21. Second installation cavity;

[0072] 30. fan assembly; 31. rotating shaft; 32. rotor; 33. fan blade; 34. first air guide member; 341. first air guide blade; 342. guide hole; 35. second air guide member; 351. second air guide blade; 36. heating element; 361. mica board; 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, gas outlet; F1, axial direction of the cylinder; DETAILED DESCRIPTION

[0079] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0080] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0081] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0082] See also Figure 1-Figure 17 The embodiment of the present application provides a heat dissipation system 100 for a hair dryer, comprising a housing 10, a barrel 20 sleeved in the housing 10, a fan assembly 30 installed in the barrel 20, and a handle 40 vertically 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 for the hair dryer is provided with a first air outlet 61, a second air outlet 71 and a third air outlet respectively arranged opposite to the second air inlet 51 along the axis of the barrel 20. 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 sequentially through the handle 40, between the housing 10 and the barrel 20, and the first air outlet 61, the second airflow flows sequentially through the fan assembly 30 and the barrel 20, and the second air outlet 71, and the third airflow flows sequentially through the fan assembly 30 and the third air outlet.

[0083] Specifically, the housing 10 serves as an outer protective structure of the heat dissipation system 100 of the hair dryer, providing an overall shape and support. The barrel 20 is sleeved in the housing 10, and together with the housing 10, forms the main body of the heat dissipation system 100 of the hair dryer. The fan assembly 30 is installed in the barrel 20 and is a core component for generating airflow. The handle 40 is vertically connected to the housing 10 for easy grip and operation by the user. The first air inlet 41 is provided on the handle 40 to form a first airflow. The second air inlet 51 is provided on the barrel 20 to form a second airflow and a third airflow.

[0084] The first air outlet 61, the second air outlet 71 and the third air outlet are opened along the axis of the cylinder 20. The first air outlet 61, the second air outlet 71 and the third air outlet are respectively arranged opposite to the second air inlet 51, and are used to output airflow.

[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 housing 10 and the barrel 20 , and is finally output from the first air outlet 61 .

[0086] The handle 40 is fixed to the housing 10 by a vertical connection structure (such as bolts, buckles, etc.). The cylinder 20 and the housing 10 are tightly matched by sleeve, abutment, buckle or other connection methods. The fan assembly 30 and the cylinder 20 are fixed in the cylinder 20 by a mounting structure (such as a bracket, a fixing piece, etc.).

[0087] When the heat dissipation system 100 of the hair dryer is working, the first air inlet 41 sucks in external air, and the external air enters the first air duct 60 to form a first airflow. The first airflow flows through the handle 40 to dissipate heat from components such as the circuit board 43 in the handle 40. Then, the first airflow flows through the annular cavity 1020 between the housing 10 and the barrel 20 to dissipate heat from the housing 10. Finally, the first airflow is output from the first air outlet 61.

[0088] The second air inlet 51 inhales external air, and a part of the external air enters the second air duct 70 to form the second airflow. The second airflow flows through the second installation cavity 21 between the fan assembly 30 and the cylinder 20, and dissipates heat to the outer surface of the fan assembly 30 (such as the second airflow to the outer surface of the phoenix blades, the first air guide 34, the second air guide 35 and the mica board 361). When the heating wire wound around the mica board 361 is energized, the second airflow flows through the heating wire to form 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.

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

[0090] By providing two air inlets and three air outlets, multiple airflow paths are formed, thereby improving the heat dissipation effect of the heat dissipation system 100 of the hair dryer. The first airflow dissipates heat to the handle 40 housing, the circuit board 43 in the handle 40, and the outer shell 10, thereby reducing the overall temperature. The second airflow dissipates heat to the outer layer of the fan assembly 30 in the barrel 20 and the mica board 361, while forming warm air output. The third airflow dissipates heat inside the fan assembly 30, especially dissipates heat at the source of heat, thereby 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 increasing the power of the heat dissipation system 100 of the hair dryer, reducing the power drop and failure rate caused by overheating, and improving the reliability and durability of the product.

[0092] In a specific embodiment, the heat dissipation system 100 of the hair dryer further includes a first air duct 60. The first air duct 60 includes: the first air inlet 41, the first installation cavity 42, the annular cavity 1020 and the first air outlet 61. The first installation cavity 42 is opened in the handle 40, and the first installation cavity 42 is connected to the first air inlet 41, and the circuit board 43 is installed in the first installation cavity 42. The annular cavity 1020 is formed between the shell 10 and the barrel 20. One end of the first installation cavity 42 away from the first air inlet 41 is connected to the annular cavity 1020, and the annular cavity 1020 is connected to 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 respectively located at both ends of the axis of the barrel 20. The first airflow sequentially flows through the first air inlet 41, the first installation cavity 42, the circuit board 43, the annular cavity 1020 and the first air outlet 61. The first airflow circulates to reduce the heat of the circuit board 43 and the housing 10.

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

[0094] The first air inlet 41 is directly connected to the first installation cavity 42 to ensure that the airflow smoothly enters the handle 40. The first installation cavity 42 is connected to the annular cavity 1020 through the connection structure between the handle 40, the housing 10, and the cylinder 20. After the airflow flows out of the first installation cavity 42, it enters the annular cavity 1020. The annular cavity 1020 and the first air outlet 61 The annular cavity 1020 is formed around the cylinder 20, and its open end is connected to the first air outlet 61. After the airflow 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 installation cavity 42 and is directly exposed to the first airflow for heat dissipation.

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

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

[0098] The efficient heat dissipation performance ensures the stability and safety of the heat dissipation system 100 of the hair dryer during long-term 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, thereby improving the user experience.

[0099] In a specific embodiment, the heat dissipation system 100 of the hair dryer further includes a second air duct 70. The second air duct 70 includes: 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 includes an air inlet member 50 sleeved with one end of the housing 10, and the air inlet member 50 is provided with a second air inlet 51. The second air outlet 71 is provided on the cylinder 20, and the second air outlet 71 is located at an end away from the second air inlet 51. The second mounting cavity 21 is provided along the axial direction F1 of the cylinder, and the second air inlet 51 and the second air outlet 71 are respectively connected to the two ends of the second mounting cavity 21. The second air flow flows through the second air inlet 51, the second mounting cavity 21 and the second air outlet 71 in sequence. 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 member 50, and is sleeved and connected to one end of the housing 10, and is the inlet of the second airflow and the third airflow. The second air inlet 51 is provided with at least a double-layer filter.

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

[0102] The second air outlet 71 is formed on the cylinder 20 . The second air outlet 71 is located at an end away from the second air inlet 51 and is an outlet of the second air flow.

[0103] The air inlet member 50 is sleeve-connected to one end of the housing 10 to ensure smooth communication between the second air inlet 51 and the second installation cavity 21 .

[0104] Both ends of the second installation cavity 21 are respectively connected to the second air inlet 51 and the second air outlet 71 to form a complete air flow channel.

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

[0106] External air enters the second air inlet 51 from the air inlet member 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 removes the heat from the fan assembly 30. Then, the airflow is discharged from the second air outlet 71, forming a complete heat dissipation path.

[0107] In a specific embodiment, the fan assembly 30 is coaxially arranged with the cylinder 20, and the fan assembly 30 includes a rotating shaft 31, a rotor 32, a fan blade 33, a first air guide 34 and a second air guide 35. The rotating shaft 31 is located at the axis of the cylinder 20, the rotor 32 is wound with a coil, the fan blade 33, the first air guide 34 and the rotor 32 are sequentially and adjacently sleeved on the rotating shaft 31 along the axial direction F1 of the cylinder, and the fan blade 33 is located at one end close to the second air inlet 51. The second installation cavity 21 is formed by connecting the second air guide 35 and the cylinder 20. The second air guide blade 35133 is sleeved on the first air guide 34. The second air guide 35 is connected to the first air guide 34. The second air guide blade 35133 is located at one end away from the fan blade 33. The rotor 32 is located in the second air guide 35. The fan blades 33 generate a second airflow, which is a rotating airflow. The second airflow flows through the first air guide 34, reduces the heat of the first air guide 34, and performs a first rectification. The second airflow flows through the second air guide 35, reduces the heat of the second air guide 35, and performs a second rectification. After the second rectification, the second airflow is a straight-in and straight-out airflow.

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

[0109] The rotating shaft 31 is not only a common supporting structure for the fan blades 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 blades 33, the rotor 32, the first air guide 34, the second air guide 35 and the mica board 361 all rotate around the rotating shaft 31. The rotating shaft 31 is usually made of high-strength, wear-resistant materials to ensure that it can withstand various forces and stresses when the fan is running.

[0110] The rotor 32 is wound around the rotating shaft 31 and is located between the fan blades 33 and the first wind 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 rotational force to drive the rotating shaft 31 to rotate. The rotor 32 is usually made of a magnetic material, such as iron, nickel or an alloy thereof, 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 and is immediately connected to the rotating shaft 31. When the rotating shaft 31 rotates, the fan blade 33 also rotates, thereby generating a rotating airflow (i.e., a second airflow). This airflow is the main source of the air blown out by the heat dissipation system 100 of the hair dryer. The design of the fan blade 33 usually includes a plurality of blades, and the shape, number, and angle of these blades are carefully calculated to ensure the generation of the most efficient airflow.

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

[0113] The second air guide 35 is connected to the first air guide 34 and is 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 heating element 36. The main function of the second air guide 35 is to further rectify and dissipate heat. It can further optimize the airflow adjusted by the first air guide 34, making it smoother and straight in and out, and continue to dissipate the heat of the fan assembly 30. At the same time, the straight-in and straight-out second airflow will also reduce the noise in the cylinder.

[0114] The design of the second air guide 35 is usually more complicated because it needs to consider the rectification effect at the same time. It may include multiple channels, heat sinks and / or other heat dissipation structures to ensure the best rectification and heat dissipation effects.

[0115] The second installation cavity 21 is formed by connecting the second air guide 35 and the cylinder 20, and serves as the main passage of the second airflow. The design of this cavity usually takes into account the fluidity and heat dissipation performance of the airflow to ensure that the airflow can pass smoothly and emit heat.

[0116] The first air guide 34 and the second air guide 35 are integrated together by a connecting structure (such as bolts, welding or other mechanical connections) to form a continuous rectification 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 respectively connected to the first air guide 34, the second air guide 35, and the rotor 32. The heating element 36 includes a mica plate 361, a plurality of mica plates 361 surround the rotating shaft 31, and a heating wire is wound around one of the mica plates 361. When the second airflow flows through the mica plate 361, the mica plate 361 is cooled. When the second airflow flows through the heating wire, warm air is formed.

[0118] Specifically, the heating element 36 is used as a heating element of the heat dissipation system 100 of the hair dryer, and the heating element 36 is sleeved in the barrel 20, and the heating element 36 is connected to the first air guide 34, the second air guide 35, and the rotor 32. It is ensured that the heating element 36 can be stably fixed inside the fan assembly 30, and at the same time, it is convenient for heat transfer and heat dissipation.

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

[0120] Each mica plate 361 is wound around the upper heating wire, and the heating wire serves as a heat source. When the heating wire is energized, heat is generated, and the second airflow flows through the heating wire to form warm air.

[0121] When the second airflow flows through the fan assembly 30, it will first pass through the mica board 361 for heat dissipation. Since the mica board 361 has good heat insulation performance, the mica board 361 can effectively slow down the release speed of heat, so that when the second airflow flows through the heating wire, it can absorb enough heat to form warm air. At the same time, the second airflow will also take away part of the heat on the mica board 361 and the heating wire, playing a role in heat dissipation.

[0122] Due to the heat insulation performance of the mica board 361, the heat can be slowly and evenly 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 rapid change of temperature, and improves the user experience.

[0123] In a specific embodiment, the first air guide member 34 is composed of a plurality of first air guide blades 341, which surround the rotating shaft 31, the second air guide member 35 is composed of a plurality of second air guide blades 35133, which surround the rotating shaft 31, the second air guide blades 35133 are connected to the tail end of the first air guide blades 341, and the mica board 361 is connected to the tail end of the second air guide blades 35133.

[0124] The number of the first air guide blades 341 is recorded as A, the number of the second air guide blades 35133 is recorded as S, and the number of the mica boards 361 is recorded as F, satisfying the relationship:

[0125] A>S;

[0126] S = F;

[0127] Wherein, one of the mica plates 361 is connected to the rear end of one of the air guide blades 33 .

[0128] The first air guide blade 341 forms a first angle with the rotating shaft 31 along the axial direction F1 of the cylinder, the first angle is recorded as U, the second air guide blade 35133 forms a second angle with the rotating shaft 31 along the axial direction F1 of the cylinder, the second angle is recorded as Q, the mica board 361 forms a third angle with the rotating shaft 31 along the axial direction F1 of the cylinder, the second angle is recorded as Q, and the relationship is satisfied:

[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, which surround the rotating shaft 31 to form a preliminary rectifying structure. The main function of the first air guide blades 341 is to rectify the rotating second airflow generated by sucking in the external air from the air blades 33 for the first time, so that it becomes smooth and orderly from disorder.

[0134] The second air guide member 35 is composed of a plurality of second air guide blades 35133, which are also surrounded by the rotating shaft 31 and connected to the tail end of the first air guide blade 341, and are used to receive the second airflow that has undergone the first rectification. The second air guide blades 35133 perform a second rectification on the second airflow to ensure that the second airflow that has undergone the second rectification is a direct current.

[0135] The second airflow flows along the gap between adjacent first guide blades 341 and undergoes a first rectification through the inclination curvature of the first guide blade 341. The first rectification is based on the inclination curvature of the first guide blade 341. The inclination curvature of the first guide blade 341 is positioned at the angle between the first guide blade 341 and the rotating shaft 31. This angle is the first angle, which is denoted as U.

[0136] The second airflow flows along the gap between adjacent second guide blades 35133, and undergoes a second rectification through the inclination curvature of the second guide blade 35133. The second rectification is based on the inclination curvature of the second guide blade 35133. The inclination curvature of the second guide blade 35133 is positioned at the angle between the second guide blade 35133 and the rotating shaft 31. This angle is the second angle, and the second angle is recorded as Q.

[0137] Each mica board 361 is connected and fitted with the tail end of a second guide blade 35133, and the gap between adjacent mica boards 361 is connected to the gap between adjacent second guide blades 35133, so as to directly receive the second airflow of the second rectification, reduce the loss of the second airflow of the second rectification, and directly act on the mica board 361 to dissipate heat from the mica board 361, or flow through the energized heating wire to form warm air.

[0138] W<Q<U;It means that the second airflow is gradually rectified by the first air guide 34, the second air guide 35 and the mica plate 361, so that the second airflow with turbulent rotation gradually becomes the second airflow that goes straight out;

[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 blade 33 and perform preliminary rectification on it. Due to the existence of the angle U, the first guide vane 341 can guide the airflow to flow along its inclined curved surface, thereby reducing the rotational component of the airflow and increasing its axial component.

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

[0141] Each mica board 361 is connected to the tail end of a second wind guide blade 35133, which ensures that the airflow after the second rectification can directly act on the mica board 361. When the airflow flows through the mica board 361, it not only takes away the heat thereon, but is also further rectified into a second straight airflow.

[0142] A heating wire is wound around the mica board 361 and is energized, so the airflow will absorb heat when flowing through it, forming warm air while maintaining a stable output of the airflow.

[0143] The first guide blade 341 and the second guide blade 35133 together transform the rotating air duct into a straight air duct, ensuring that the airflow can maintain a direct current state when flowing through the entire fan assembly 30. The fitting connection between the mica board 361 and the second guide blade 35133 ensures that heat can be efficiently transferred to the airflow, and the heat insulation performance of the mica board 361 also prevents the heat from overheating other parts of the fan assembly 30.

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

[0145] Experimental Materials:

[0146] Fan: As an air flow source, it provides a stable air flow.

[0147] Air guide plate: Two air guide plates with different angles, used for rectification of the first stage and the second stage respectively.

[0148] Anemometer: used to measure the velocity of rectified air flow.

[0149] Angle measuring instrument: used to accurately measure the angle of the wind deflector.

[0150] Experimental steps:

[0151] Place the fan at one end of the lab bench and secure it.

[0152] Fix the first air guide plate (angle U) at the fan outlet to ensure that the airflow can pass smoothly.

[0153] A second air guide plate (angle Q) is fixed at a certain distance behind the first air guide plate to ensure that the airflow can be rectified twice.

[0154] An anemometer is arranged behind the second air guide plate to measure the velocity of the rectified air flow.

[0155] Turn on the fan, direct the airflow through the deflector, and record the reading on the anemometer.

[0156] Repeat the experiment, changing the angles of U and Q, and observe and record the rectified airflow velocity at different angles.

[0157] Experimental data

[0158]

[0159] Experimental results and analysis

[0160] It can be seen from the experimental data that when the first air guide plate angle U and the second air guide plate angle Q are both moderate (such as U=45°, Q=20°), the air flow velocity 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 in airflow velocity or instability.

[0162] In a specific embodiment, the heating element 36 further includes: a first thermal insulation layer 362 and a second thermal insulation layer 363 sleeved with the first thermal insulation layer 362 , the mica board 361 is connected to the first thermal 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 second installation cavity 21 to isolate the heat from the rotor 32 in the heating element 36 (heat dissipation cavity 82). The heat of the heat dissipation cavity 82 is taken away by the third airflow to prevent the heat dissipation cavity 82 from being overheated and burning the rotor 32.

[0164] A gap is formed between the first heat insulation layer 362 and the second heat insulation layer 363 to further increase the conduction area of ​​the incremental heat.

[0165] The air intake of the heat dissipation system 100 of the hair dryer is smaller than the air outlet. This design allows the airflow to stay longer inside the heat dissipation system 100 of the hair dryer (including the handle 40, the annular cavity 1020, the second installation cavity 21 and the fan assembly 30). The extended airflow residence time helps to fully remove 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 in the handle 40, the annular cavity 1020, etc.), and enters the heating element 36 area. In the heating element 36 area, the airflow contacts the mica board 361 and the first and second heat insulation layers 363, and takes away the heat they transfer. Because the air intake is less than the air outlet, the airflow forms a kind of "retention" effect inside the heat dissipation system 100 of the hair dryer, and this effect enables the airflow to contact with each component more fully, thereby taking away the heat more effectively. Finally, the airflow after heating and heat dissipation is ejected from 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 installation 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, the guide hole 342 is arranged along the axial direction of the cylinder 20, a plurality of the guide holes 342 surround the rotating shaft 31, and the guide hole 342 is connected to the second installation cavity 21. The placement cavity 81 is the gap between the coils wound by the rotor 32, the placement cavity 81 is connected to the guide hole 342, and the placement cavity 81 is located at one end away from the second air inlet. The heat dissipation cavity 82 is formed by connecting the rotor 32 and the second heat insulation layer 363, the heat dissipation cavity 82 is connected to the placement cavity 81, and the rotor 32 and the connecting shaft extend into the heat dissipation cavity 82. The heat dissipation system 100 of the hair dryer includes an air outlet member covered in the barrel body 20 , and the third air outlet is located between the air inlet member and the barrel body 20 .

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

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

[0170] The first air guide member 34 is provided with a guide hole 342 , which is arranged along the axial direction of the cylinder 20 , and a plurality of guide holes 342 are arranged around the rotating shaft 31 to ensure that the airflow can be evenly distributed.

[0171] The guide hole 342 connects the second installation cavity 21 with a subsequent airflow path (such as the placement cavity 81 ).

[0172] The placement chamber 81 is a gap between the coils wound around the rotor 32, and is located at an end away from the second air inlet. This gap not only provides installation space for the coil, but also serves as a part for the airflow channel, allowing airflow to pass through and take away the heat of the coil.

[0173] The heat dissipation cavity 82 is formed by connecting the rotor 32 and the second heat insulation layer 363, and is connected to the placement cavity 81. The heat dissipation cavity 82 further reduces the heat of the mica board 361 and the heating wire, and prevents the heat in the second installation 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 outside airflow.

[0174] The heat dissipation system 100 of the hair dryer also includes an air outlet, which is covered in the barrel 20 and located between the air inlet and the barrel 20. The third air outlet is located on the air outlet, which is the last step for the airflow to leave the heat dissipation system 100 of the hair dryer.

[0175] Thus, by setting a 2-inlet and 3-outlet air duct, a first airflow, a second airflow and a third airflow are generated to dissipate heat of the heat dissipation system 100 of the hair dryer. Specifically, the first airflow dissipates heat to the housing of the handle 40, the circuit board 43 in the handle 40 and the housing 10;

[0176] The second airflow dissipates heat from the outer surface of the fan assembly 30 and the mica board 361 in the cylinder 20. When the heating wire wound around the mica board 361 is energized, the second airflow flows through the heating wire and forms warm air.

[0177] The third airflow dissipates heat inside the fan assembly 30, and focuses on the heat source of the fan assembly 30 (the coil wound on the rotor 32).

[0178] Then, in order to reduce the installation space between the fan assembly 30 and the heating element 36, the rotor 32 is partially extended into the heating element 36. In order to prevent the heat generated by the heating element 36 from overheating the rotor 32, the third airflow flows through the heating element 36 to take away the heat.

[0179] Then, in order to reduce the impact of the heat of the mica board 361 on the rotor 32, a double-layer insulation layer is provided to reduce the damage to the rotor 32 caused by the heat generated by the mica board 361 and the heating wire. The third airflow is also a straight-in and straight-out airflow, which will further reduce the noise inside the fan assembly 30.

[0180] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A heat dissipation system for a hair dryer, characterized in that: include: A housing, a cylinder sleeved in the housing, a fan assembly installed in the cylinder, and a handle vertically connected to the housing; The handle is provided with a first air inlet, the barrel is provided with a second air inlet, and the heat dissipation system of the hair dryer is provided with 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 barrel; The first air inlet forms a first airflow, and the second air inlet forms a second airflow and a third airflow; The first airflow flows sequentially through the handle, between the outer shell and the cylinder, and the first air outlet; the second airflow flows sequentially through the fan assembly and the cylinder, and the second air outlet; and the third airflow flows sequentially through the fan assembly and the third air outlet.

2. A heat dissipation system for a hair dryer according to claim 1, characterized in that: The heat dissipation system of the hair dryer further comprises a first air duct, wherein the first air duct comprises: the first air inlet, a first installation cavity, an annular cavity and the first air outlet; The first installation cavity is opened in the handle, and the first installation cavity is communicated with the first air inlet, and the circuit board is installed in the first installation cavity; The annular cavity is formed between the shell and the cylinder, one end of the first installation cavity away from the first air inlet is connected to the annular cavity, and the annular cavity is connected to the first air outlet; The first air outlet is formed by the casing and the cylinder, and the second air inlet and the first air outlet are respectively located at two ends of the axis of the cylinder; The first airflow flows through the first air inlet, the first installation cavity, the circuit board, the annular cavity and the first air outlet in sequence, and the first airflow circulates to reduce the heat of the circuit board and the housing.

3. A heat dissipation system for a hair dryer according to claim 2, characterized in that: The heat dissipation system of the hair dryer further comprises a second air duct, wherein the second air duct comprises: a second air inlet, a second installation cavity, and a second air outlet; The heat dissipation system of the hair dryer comprises an air inlet member sleeved with one end of the housing, the air inlet member is provided with a second air inlet, the second air outlet is provided on the cylinder, and the second air outlet is located at an end away from the second air inlet; The second installation cavity is opened along the axial direction of the cylinder, and the second air inlet and the second air outlet are respectively connected to two ends of the second installation cavity; The second airflow flows through the second air inlet, the second installation cavity and the second air outlet in sequence. When the second airflow flows through the second installation cavity, the heat of the fan assembly installed in the second installation cavity is reduced.

4. A heat dissipation system for a hair dryer according to claim 1, characterized in that: The fan assembly is coaxially arranged with the cylinder, the fan assembly is located in the second installation cavity, and the fan assembly includes a rotating shaft, a rotor, a fan blade, a first air guide and a second air guide; The rotating shaft is located at the axis of the cylinder, the rotor is wound 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 axial direction of the cylinder, and the fan blade is located at one end close to the second air inlet; The second installation cavity is formed by connecting the second air guide member and the cylinder; The second air guide blade is sleeved on the first air guide member, the second air guide member is connected to the first air guide member, the second air guide blade is located at an end away from the air blade, and the rotor is located in the second air guide member; The fan blade generates a second airflow, which is a rotating airflow. The second airflow flows through the first air guide member to reduce the heat of the first air guide member and perform a first rectification. The second airflow flows through the second air guide member, reduces the heat of the second air guide member and performs a second rectification. After the second rectification, the second airflow is a straight-in and straight-out airflow.

5. A heat dissipation system for a hair dryer according to claim 4, characterized in that: The fan assembly further includes a heating element, which is sleeved in the cylinder and connected to the first air guide element, the second air guide element, and the rotor respectively; The heating element comprises a mica plate, a plurality of the mica plates surround the rotating shaft, and a heating wire is wound around one of the mica plates; When the second airflow flows through the mica board, the mica board is cooled; When the second airflow flows through the heating wire, warm air is formed.

6. A heat dissipation system for a hair dryer according to claim 3, characterized in that: The first air guide member is composed of a plurality of first air guide blades, which are surrounded by the rotating shaft. The second air guide member is composed of a plurality of second air guide blades, which are surrounded by the rotating shaft. The second air guide blades are connected to the tail end of the first air guide blades. The mica board is connected to and fits with the tail end of the second air guide blade.

7. A heat dissipation system for a hair dryer according to claim 6, characterized in that: The number of the first air guide blades is recorded as A, the number of the second air guide blades is recorded as S, and the number of the mica boards is recorded as F, satisfying the relationship: A>S; S = F; Wherein, one of the mica plates is connected to the tail end of one of the air guide blades.

8. A heat dissipation system for a hair dryer according to claim 7, characterized in that: The first air guide blade and the rotating shaft form a first angle along the axial direction of the cylinder, the first angle is recorded as U, the second air guide blade and the rotating shaft form a second angle along the axial direction of the cylinder, the second angle is recorded as Q, and the mica board and the rotating shaft form a third angle along the axial direction of the cylinder, the second angle is recorded as Q, satisfying the relationship: W＝0°； W<Q<U; U≤60°； Q＞10°。 9. A heat dissipation system for a hair dryer according to claim 5, characterized in that: The heating element further includes: a first thermal insulation layer and a second thermal insulation layer sleeved with the first thermal insulation layer, the mica board is connected to the first thermal insulation layer, and the rotor extends into the heating element.

10. A heat dissipation system for a hair dryer according to claim 9, characterized in that: The fan assembly includes a third air duct, and the third air duct includes: a second air inlet, a second installation cavity, a guide hole, a placement cavity, a heat dissipation cavity and a third air outlet; The first air guide member is provided with the guide hole, the guide hole is arranged along the axial direction of the cylinder, a plurality of the guide holes surround the rotating shaft, and the guide hole is connected to the second installation cavity; The placement cavity is the gap between the coils wound around the rotor, the placement cavity is communicated with the guide hole, and the placement cavity is located at one 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 communicated with the placement cavity, and the rotor and the connecting shaft extend into the heat dissipation cavity; The heat dissipation system of the hair dryer comprises an air outlet member covered in the barrel body, and the third air outlet is located between the air inlet member and the barrel body.

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