Heat dissipation device, vehicle lamp assembly and vehicle

Abstract

The embodiment of the invention provides a heat dissipation device, a vehicle lamp assembly and a vehicle. The heat dissipation device comprises a fan and a heat dissipation piece. The heat dissipation piece comprises a tooth body piece, a first opening and at least one second opening, and at least part of the tooth body piece is arranged in the heat dissipation piece. In the axial direction of the fan, the at least one second opening is formed in the same end of the heat dissipation piece and is spaced from the first opening, the first opening and the at least one second opening communicate with the interior and the exterior of the heat dissipation piece correspondingly, and the at least one second opening is used for allowing air at the second opening to enter the interior of the heat dissipation piece; the first opening is used for guiding out air in the heat dissipation piece. The fan is arranged at the first opening, the fan and the tooth body part are arranged side by side in the axial direction of the fan, the fan comprises an air inlet facing the tooth body part, and the air inlet is used for receiving air guided out of the first opening or air in the heat dissipation part. According to the heat dissipation device, the vehicle lamp assembly and the vehicle, the heat dissipation capacity can be improved, and noise can be reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of heat dissipation technology, and in particular to a heat dissipation device, a vehicle lamp assembly, and a vehicle. Background Art

[0002] With the innovation and continuous development of vehicle technology, the headlight system has also developed from the original single lighting attribute to personalized appearance, safe interaction and intelligent driving (small size, high power). Usually, the heat dissipation device used to dissipate heat from the headlight system includes a radiator and a fan, which are arranged outside the headlight and located between the radiator and the light source and fan of the headlight. However, the heat dissipation device has the problem of weak heat dissipation capacity. Therefore, how to improve the heat dissipation capacity of the heat dissipation device has become a problem to be solved urgently. Summary of the invention

[0003] The embodiments of the present application provide a heat dissipation device, a vehicle lamp assembly, and a vehicle, which can not only improve the heat dissipation capacity of the heat dissipation device, but also reduce the noise generated by the heat dissipation device.

[0004] In a first aspect, the present application provides a heat dissipation device, including a fan and a heat sink. The heat sink includes a tooth body, a first opening, and at least one second opening, and at least a portion of the tooth body is disposed inside the heat sink. Along the axial direction of the fan, at least one second opening is disposed at the same end of the heat sink and is spaced apart from the first opening, the first opening and at least one second opening are respectively connected to the inside and outside of the heat sink, at least one second opening is used for allowing air at the second opening to enter the inside of the heat sink, and the first opening is used for guiding the air out of the inside of the heat sink. The fan is disposed at the first opening, and along the axial direction of the fan, the fan and the tooth body are disposed side by side, and the fan includes an air inlet facing the tooth body, and the air inlet is used to receive the air guided out of the first opening or the air inside the heat sink.

[0005] When the heat dissipation device provided in the embodiment of the present application is used to dissipate heat from a device to be dissipated, air enters the interior of the heat sink through the second opening, and then leaves the interior of the heat sink from the first opening. During this process, the air and the heat sink perform heat exchange to take away the heat generated by the device to be dissipated and received by the heat sink, so that the temperature of the device to be dissipated is within a reasonable range. Among them, the fan is arranged at the first opening, and can suck away the air inside the heat sink or the air derived from the first opening to speed up the flow of the internal air of the heat sink and ensure the heat dissipation capacity of the heat sink. In addition, the tooth body is used to increase the heat exchange area between the heat sink and the air, thereby improving the heat dissipation capacity of the heat sink.

[0006] Since the air enters from the second opening and passes through the interior of the heat sink before leaving the first opening, and under the action of the fan, the air inside the heat sink flows, the heat dissipation capacity of the heat sink can be improved. In addition, since at least part of the tooth body is arranged inside the heat sink, the noise generated after the airflow inside the heat sink passes through the tooth body inside the heat sink can be shielded by the heat sink to reduce the size of the noise emitted by the heat sink. Therefore, the heat sink provided in the embodiment of the present application can not only improve the heat dissipation capacity, but also reduce noise.

[0007] In a possible implementation, along the axial direction of the fan, a distance between the tooth body and the air inlet is greater than or equal to 2 mm.

[0008] The heat dissipation device provided in the embodiment of the present application sets the distance between the air inlet of the fan and the tooth body in the axial direction of the fan to be greater than or equal to 2 mm, so that there is a transition space for accommodating air between the air inlet and the tooth body, and the air entering the air inlet can be mixed, which can further reduce noise.

[0009] In a possible implementation, at least a portion of the fan is disposed inside the heat sink, the air inlet is disposed inside the heat sink, and the fan further includes an air outlet connected to the first opening, and air inside the heat sink enters the first opening through the fan.

[0010] In the heat dissipation device provided in the embodiment of the present application, at least a portion of the fan is arranged inside the heat dissipation element and the air inlet is arranged inside the heat dissipation element, which can not only improve the heat dissipation capacity of the heat dissipation device and reduce noise, but also reduce the axial size of the heat dissipation device in the fan, thereby facilitating miniaturization.

[0011] In a possible embodiment, the heat sink includes a first air guide and a heat sink, and at least a portion of the fan is disposed inside the first air guide. The heat sink includes a main body and a tooth body, and the main body is used to contact the device to be cooled. At least a portion of the tooth body is disposed inside the first air guide, and along the axial direction of the fan, one end of the tooth body is close to the fan, and the other end of the tooth body is connected to the main body. Along the axial direction of the fan, one end of the first air guide includes a first opening or one end of the first air guide and the heat sink define a first opening, and the other end of the first air guide and the heat sink define at least one second opening.

[0012] The heat dissipation device provided in the embodiment of the present application is provided with a heat dissipation member formed by a first air guide member and a heat sink, and cooperates with a fan, which can improve the heat dissipation capacity of the heat dissipation device and reduce noise. In addition, the heat sink can adopt an existing heat sink, such as a fin-type heat sink, which helps to reduce the design difficulty of the heat dissipation device and can also reduce the cost of the heat dissipation device.

[0013] In a possible embodiment, the first air guide member includes a plurality of first cantilever portions. Along the circumference of the fan, the plurality of first cantilever portions surround the fan and the radiator. Along the radial direction of the fan, a portion of the projection of each first cantilever portion overlaps with the projection of the tooth member, and another portion overlaps with the projection of the fan. Along the axial direction of the fan, one end of the plurality of first cantilever portions jointly encloses a first opening or one end of the plurality of first cantilever portions and the radiator jointly enclose a first opening, and the other end of each first cantilever portion and the radiator jointly enclose at least one second opening.

[0014] Each first cantilever portion in the heat dissipation device provided in the embodiment of the present application shields part of the tooth body part along the radial direction of the fan, so that the first air guide part and the heat sink can form a cavity that accommodates at least part of the tooth body part, and the cavity is connected to the first opening and the second opening, so that air can pass through the tooth body part and leave from the first opening, thereby improving the heat dissipation capacity of the heat dissipation device.

[0015] In a possible implementation, there is a gap between each first cantilever part and the tooth body member along the radial direction of the fan. With such an arrangement, when the heat dissipation device shakes, it can avoid the first cantilever part and the tooth body member from colliding and generating noise.

[0016] In a possible implementation, each first cantilever portion satisfies the relationship: 1 / 3H≤L1≤2 / 3H, where H is the height of the heat sink in the axial direction of the fan, and L1 is the relative length between each first cantilever portion and the heat sink, and the relative length refers to the relative distance between the tooth body along the axial direction of the fan and the first cantilever portion in the radial direction of the fan. This arrangement can ensure that the amount of air entering the heat sink meets the requirements, and the heat of the heat sink is taken away in time, thereby ensuring that the temperature of the heat sink is within a reasonable range, thereby ensuring the heat dissipation effect of the heat sink. In addition, it can also improve the flow of air and reduce noise.

[0017] In a possible implementation, the relative length L1 of each first cantilever portion and the heat sink is 0.54H. This arrangement can effectively balance the air volume entering the heat sink and the noise generated by the air passing through the second opening, which can not only meet the heat dissipation requirements of the heat sink and thus improve the heat dissipation capacity of the heat sink, but also control the noise within a reasonable range.

[0018] In a possible embodiment, each first cantilever portion includes a first part and a second part. Along the axial direction of the fan, the first part is close to the fan, and the second part is close to the tooth body. Along the radial direction of the fan, the first surface of the first part facing the fan intersects with the second surface of the second part facing the tooth body, and the first surface is arranged between the second surface and the fan, and the angle between the first surface and the second surface is a rounded angle. Such an arrangement can avoid sudden changes in the airflow formed by the air inside the heat sink when it moves against the first cantilever portion, so that the airflow flows smoothly from the second opening to the first opening to reduce noise.

[0019] In a possible implementation, the first air guide also includes a plurality of filling parts, the plurality of filling parts correspond to the plurality of first cantilever parts one by one, and each filling part fills the gap between the fan and the corresponding first cantilever part in the radial direction of the fan. With such an arrangement, the gap between the first cantilever part and the fan in the radial direction of the fan can be reduced, even to zero, and the air in the gap between the first cantilever part and the fan can be prevented from being sucked back under the action of the fan, generating backflow or large-scale eddy current at the air inlet, so as to reduce noise.

[0020] In a possible implementation, each filling portion is an integral structure with the fan and one of the corresponding first cantilever portions. This arrangement can reduce the number of parts of the heat sink and improve the assembly efficiency of the heat sink. In addition, the filling portion and the first cantilever portion are an integral structure, so there is no need to change the structure of the fan, so that an existing fan can be used, thereby reducing costs.

[0021] In a possible implementation, the first air guide also includes a first main body, and along the axial direction of the fan, a plurality of first cantilever parts are connected to the same side of the first main body, the fan is arranged between the first main body and the tooth body, and the first main body includes a first opening. Such an arrangement can improve the production efficiency of the first air guide, for example, the first air guide can be integrally formed by stamping. In addition, the number of assembly times of the heat dissipation device can be reduced to improve the assembly efficiency of the heat dissipation device.

[0022] In a possible implementation, the first air guide further includes a hand-hitting prevention portion, which is disposed at the first opening and includes an air outlet structure connected to the first opening. This arrangement can prevent the user's fingers from passing through the first opening and contacting the blades of the fan, thereby preventing the user's fingers from being injured.

[0023] In a possible implementation, the hand-protecting portion is disposed inside the first opening. This arrangement can reduce the size of the heat sink in the axial direction of the fan, which is beneficial to the miniaturized design of the heat sink.

[0024] In a possible implementation, the anti-hitting hand portion and the first main body portion are an integrated structure. This arrangement can reduce the number of parts of the heat sink to improve the assembly efficiency of the heat sink. In addition, the production efficiency of the heat sink can also be improved.

[0025] In a possible implementation, the first air guide further includes a plurality of folded edge portions, and along the radial direction of the fan, a folded edge portion is respectively provided at opposite ends of each first cantilever portion, and at least a portion of the projection of each folded edge portion overlaps with the projection of the fan. This arrangement can prevent the edge of each first cantilever portion from cutting the wire electrically connected to the fan, thereby ensuring stable operation of the fan.

[0026] In a possible embodiment, the heat sink also includes a spacer, which is arranged between the tooth body and the fan along the axial direction of the fan, and the projection of the spacer and the projection of the air inlet at least partially do not overlap, and the spacer is used to make the distance between the air inlet and the tooth body in the axial direction of the fan greater than or equal to 2 mm.

[0027] The heat dissipation device provided in the embodiment of the present application can ensure that the distance between the air inlet and the tooth part in the axial direction of the fan is at least greater than 2 mm by setting a spacer between the fan and the tooth part, ensuring that there is a transition space between the air inlet and the tooth part, thereby avoiding large mutations in the air after entering the air inlet to reduce noise.

[0028] In a possible implementation manner, the spacer is an integral structure with one of the tooth body and the fan. This arrangement can reduce the number of parts of the heat dissipation device, thereby improving the assembly efficiency of the heat dissipation device.

[0029] In a possible implementation, the spacer is detachably disposed between the fan and the tooth body, and along the axial direction of the fan, the spacer abuts against the fan and the tooth body, respectively. With such an arrangement, there is no need to change the structure of the radiator and the fan, so that the existing radiator and fan can be used, thereby reducing the design difficulty and cost of the heat dissipation device.

[0030] In a possible implementation, the first air guide member includes a first tubular portion with a hollow structure, the radiator portion is disposed inside the first tubular portion, and the fan is disposed inside the first tubular portion. In the radial direction of the fan, the projection of the tooth member partially overlaps with the projection of the first tubular portion. In the axial direction of the fan, the opening of the first tubular portion close to the fan is the first opening, and one end of the first tubular portion close to the radiator and the radiator are surrounded by at least one second opening.

[0031] In the heat dissipation device provided in the embodiment of the present application, part of the heat sink is arranged inside the first tubular portion, so that at least part of the tooth body is arranged inside the heat sink, which can ensure that air enters the interior of the heat sink from the second opening and leaves the interior of the heat sink from the first opening, so as to improve the heat dissipation capacity of the heat dissipation device. In addition, the first air guide can be matched with heat sinks of different structures, which can improve the applicability of the first air guide.

[0032] In a possible implementation, the fan is disposed outside the heat sink, the air inlet is used to receive air derived from the first opening, and the fan further includes an air outlet disposed outside the heat sink.

[0033] In the heat dissipation device provided in the embodiment of the present application, the fan is arranged outside the heat dissipation element, which can also simplify the structure of the heat dissipation element while reducing noise and improving heat dissipation capacity.

[0034] In a possible embodiment, the heat sink includes a second air guide and a heat sink. The heat sink includes a main body and a tooth body, and the main body is used to contact the device to be cooled. At least part of the tooth body is arranged inside the second air guide, and along the axial direction of the fan, one end of the tooth body is close to the first opening, and the other end of the tooth body is connected to the main body. Along the axial direction of the fan, one end of the second air guide includes a first opening or the second air guide and the heat sink jointly enclose a first opening, and the other end of the second air guide and the heat sink jointly enclose at least one second opening.

[0035] The heat sink in the heat dissipation device provided in the embodiment of the present application is composed of the second air guide and the heat sink, so that air can enter the interior of the heat sink from the second opening and leave the interior of the heat sink from the first opening, thereby improving the heat dissipation capacity. In addition, the existing heat sink can be used in conjunction with the second air guide, which can reduce the cost and design difficulty of the heat sink.

[0036] In a possible embodiment, the second air guide member includes a plurality of second cantilever portions. Along the circumference of the fan, the plurality of second cantilever portions surround the heat sink. Along the radial direction of the fan, the projection of each second cantilever portion partially overlaps with the projection of the tooth body member. Along the axial direction of the fan, one end of the plurality of second cantilever portions jointly encloses a first opening or one end of the plurality of second cantilever portions and the heat sink jointly enclose a first opening, and the other end of each second cantilever portion and the heat sink jointly enclose at least one second opening.

[0037] Each second cantilever portion in the heat dissipation device provided in the embodiment of the present application shields part of the tooth body part along the radial direction of the fan, so that the second air guide part and the heat sink can form a cavity that accommodates at least part of the tooth body part, and the cavity is connected to the first opening and the second opening, so that air can pass through the tooth body part and leave from the first opening, thereby improving the heat dissipation capacity of the heat dissipation device.

[0038] In a possible implementation, there is a gap between each second cantilever part and the tooth body member along the radial direction of the fan. With such an arrangement, when the heat dissipation device shakes, it is possible to avoid the second cantilever part colliding with the tooth body member to generate noise.

[0039] In a possible implementation, each second cantilever portion satisfies the relationship: 1 / 3H≤L2≤2 / 3H, where H is the height of the heat sink in the axial direction of the fan, and L2 is the relative length between each second cantilever portion and the heat sink, and the relative length refers to the relative distance between the axial tooth body of the fan and the second cantilever portion in the radial direction of the fan. This arrangement can ensure that the amount of air entering the heat sink meets the requirements, and the heat of the heat sink is taken away in time, thereby ensuring that the temperature of the heat sink is within a reasonable range, thereby ensuring the heat dissipation effect of the heat sink. In addition, it can also improve the flow of air and reduce noise.

[0040] In a possible implementation, the relative length L2 of each second cantilever portion and the heat sink is 0.54H. This arrangement can effectively balance the air volume entering the heat sink and the noise generated by the air passing through the second opening, which can not only meet the heat dissipation requirements of the heat sink and thus improve the heat dissipation capacity of the heat sink, but also control the noise within a reasonable range.

[0041] In a possible implementation, the second air guide member further includes a second main body portion, and along the axial direction of the fan, a plurality of second cantilever portions are connected to the same side of the second main body portion, the second main body portion is arranged between the tooth body member and the fan, and the second main body portion includes a first opening. Such an arrangement can improve the production efficiency of the second air guide member, for example, the second air guide member can be integrally formed by stamping. In addition, the number of assembly times of the heat dissipation device can be reduced to improve the assembly efficiency of the heat dissipation device.

[0042] In a possible implementation, along the axial direction of the fan, the second main body portion abuts against the fan and the tooth member respectively, and the thickness of the second main body portion is greater than or equal to 2 mm.

[0043] The heat dissipation device provided in the embodiment of the present application is respectively connected to the fan and the tooth body through the second main body, so that the distance between the air inlet and the tooth body in the axial direction of the fan is greater than or equal to 2 mm, so as to ensure that there is a transition space between the air inlet and the tooth body for air to pass through, thereby achieving the purpose of reducing noise. In addition, the number of parts of the heat dissipation device can also be reduced. Even without changing the structure of the radiator and the fan, the heat dissipation device can be reduced.

[0044] In a possible implementation, the third surface of each second cantilever portion facing the tooth member along the radial direction of the fan intersects with the fourth surface of the second main body portion facing the tooth member along the axial direction of the fan, and the angle between the third surface and the fourth surface is a rounded angle. This arrangement can avoid sudden changes in the airflow formed by the air inside the heat sink when it moves against the second cantilever portion, so that the airflow flows smoothly from the second opening to the first opening to reduce noise.

[0045] In a possible implementation, the second air guide member includes a second tubular portion with a hollow structure, the heat sink portion is disposed inside the second tubular portion, and the fan is disposed outside the second tubular portion. In the radial direction of the fan, the projection of the tooth member partially overlaps with the projection of the second tubular portion. In the axial direction of the fan, the opening of the second tubular portion close to the fan is a first opening, and one end of the second tubular portion close to the heat sink and the heat sink are surrounded by at least one second opening.

[0046] In the heat dissipation device provided in the embodiment of the present application, part of the heat sink is arranged inside the second tubular portion, so that at least part of the tooth body is arranged inside the heat sink, which can ensure that air enters the interior of the heat sink from the second opening and leaves the interior of the heat sink from the first opening, thereby improving the heat dissipation capacity of the heat dissipation device. In addition, the second air guide can also be matched with heat sinks of different structures, which can improve the applicability of the second air guide.

[0047] In a possible embodiment, the tooth body includes a plurality of heat dissipation teeth, and each second opening corresponds to a plurality of heat dissipation teeth arranged at intervals along the circumference of the fan, wherein: each heat dissipation tooth is arranged inside the heat dissipation element. Alternatively, a portion of each heat dissipation tooth is arranged inside the heat dissipation element, and another portion is arranged inside the corresponding second opening.

[0048] The heat dissipation device provided in the embodiment of the present application adopts a tooth body member composed of multiple heat dissipation teeth, which can increase the heat exchange area between the heat dissipation member and the air, thereby improving the heat dissipation capacity of the heat dissipation member, and further improving the heat dissipation capacity of the heat dissipation device.

[0049] The second aspect of the present application provides a vehicle lamp assembly, comprising a vehicle lamp body and a heat dissipation device as described in any one of the first aspects. The vehicle lamp body comprises a housing and a light source disposed inside the housing. The heat dissipation element of the heat dissipation device is disposed inside the housing and is used to dissipate heat from the light source.

[0050] The vehicle lamp assembly provided in the embodiment of the present application dissipates heat from the light source through a heat dissipation device, thereby ensuring that the temperature of the light source is within a reasonable range, reducing noise, preventing or improving the user from hearing the noise generated by the heat dissipation device, and improving the user experience.

[0051] A third aspect of the present application provides a vehicle, comprising the vehicle light assembly as described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a structural schematic diagram of a heat dissipation device in the related art;

[0053] Figure 2 A three-dimensional structural diagram of a first vehicle lamp assembly provided in an embodiment of the present application;

[0054] Figure 3 for Figure 2 A three-dimensional structural diagram of the first heat dissipation device;

[0055] Figure 4 for Figure 3 A front view of the heat dissipation device in FIG.

[0056] Figure 5 for Figure 4 The cross-sectional view in the AA direction;

[0057] Figure 6 for Figure 5 A three-dimensional structural diagram of the first type of radiator;

[0058] Figure 7 for Figure 6 A front view of the radiator is shown;

[0059] Figure 8 for Figure 6 A top view of the heat sink is shown;

[0060] Fig. 9 A cross-sectional view of a second heat sink provided in an embodiment of the present application;

[0061] Fig.10 A cross-sectional view of a third heat sink provided in an embodiment of the present application;

[0062] Fig.11 A cross-sectional view of a fourth heat sink provided in an embodiment of the present application;

[0063] Fig.12 A cross-sectional view of another tooth body member provided in an embodiment of the present application;

[0064] Fig.13 A cross-sectional view of another tooth body member provided in an embodiment of the present application;

[0065] Fig.14 for Figure 3 A three-dimensional structural diagram of the first first air guide member;

[0066] Fig.15 for Fig.14 A top view of the first air guide member shown;

[0067] Fig.16 for Fig.14 A front view of the first air guide member shown;

[0068] Fig.17 A cross-sectional view of a second heat dissipation device provided in an embodiment of the present application;

[0069] Fig.18 A cross-sectional view of a third heat dissipation device provided in an embodiment of the present application;

[0070] Fig.19 A cross-sectional view of a fourth heat dissipation device provided in an embodiment of the present application;

[0071] Fig. 20 A three-dimensional structural diagram of a second vehicle lamp assembly provided in an embodiment of the present application;

[0072] Fig.21 for Fig. 20 A three-dimensional structural diagram of a fifth heat dissipation device;

[0073] Fig. 22 for Fig. 20 A front view of the heat dissipation device in FIG.

[0074] Fig.23 for Fig. 22 Cross-sectional view in the BB direction;

[0075] Fig.24 for Fig.23 A three-dimensional structural diagram of the first second air guide member;

[0076] Fig.25 for Fig.24 A front view of the second air guide member in FIG.

[0077] Fig.26 A cross-sectional view of a sixth heat dissipation device provided in an embodiment of the present application;

[0078] Fig. 27 A cross-sectional view of a seventh heat dissipation device provided in an embodiment of the present application;

[0079] Fig.28 A cross-sectional view of an eighth heat dissipation device provided in an embodiment of the present application.

[0080] Description of reference numerals:

[0081] 100, heat sink; 110, first opening; 120, second opening;

[0082] 130. Radiator;

[0083] 131, main body; 1311, main body; 1312, connecting part; 13121, rod-shaped segment; 13122, plate-shaped segment;

[0084] 132, tooth body; 1321, heat dissipation tooth part; 1322, tube body part;

[0085] 140. A first air guide member;

[0086] 141, first cantilever portion; 1411, first portion; 1412, second portion;

[0087] 142, filling part; 143, folding part; 144, first main body part; 145, anti-hitting part; 1451, anti-hitting tendon;

[0088] 146, first tubular portion; 1461, wire hole;

[0089] 150, spacer;

[0090] 160, second air guide; 161, second cantilever portion; 162, second main body portion; 163, second tubular portion;

[0091] 171. Air outlet structure; 172. Anti-hand-beating device; 173. Fastener;

[0092] 200, fan; 210, air inlet; 220, air outlet;

[0093] 10. heat dissipation device; 20. headlight body;

[0094] A1, first surface; A2, second surface; A3, third surface; A4, fourth surface. DETAILED DESCRIPTION

[0095] Figure 1 Schematic diagram of the structure of the heat dissipation device in the related art. At present, the light source 11 of the headlight on the vehicle adopts power devices such as light emitting diodes, which will generate a lot of heat during use. If it is not dissipated in time, the light source 11 will be damaged. Therefore, a heat dissipation device is set outside the headlight, such as Figure 1 As shown, the heat dissipation device includes a radiator 13 and a fan 14. One end of the radiator 13 exchanges heat with the light source 11 of the headlight, and the other end of the radiator 13 contacts the fan 14. When the headlight is working, the heat generated by the light source 11 is transferred to the radiator 13, and the radiator 13 exchanges heat with the air. The fan 14 makes the air that exchanges heat with the radiator 13 flow and form an airflow.

[0096] However, since the heat sink is arranged outside the housing 12 of the headlight, the housing 12 of the headlight will not shield the heat sink. Therefore, when the airflow passes through the radiator 13 or when the airflow is coupled with the blades of the fan 14, noise transmitted to the user will be generated, reducing the user experience. In addition, since the radiator 13 mainly exchanges heat with the air through a plurality of heat sink teeth arranged at intervals, and the fan 14 is arranged at one end of the heat sink teeth, the airflow velocity around the heat sink teeth away from the fan 14 is relatively low, and the airflow velocity around the heat sink teeth close to the fan 14 is high, resulting in a part of the heat sink teeth having a high temperature and another part of the heat sink teeth having a low temperature, which will reduce the overall heat dissipation capacity of the radiator 13 and result in poor overall heat dissipation effect. In addition, when assembling or maintaining the fan 14, there is a risk that the user's fingers will be inserted into the fan 14 and scratched by the rotating blades.

[0097] In view of this, the embodiment of the present application provides a heat dissipation device 10, a vehicle lamp assembly, and a vehicle, which can improve the heat dissipation capacity of the heat dissipation device 10, thereby meeting the heat dissipation requirements of the vehicle lamp assembly. In addition, the noise of the heat dissipation device 10 during operation can be reduced, thereby improving the user experience. In addition, the user's fingers can be prevented from being scratched when assembling or maintaining the fan 200.

[0098] The heat dissipation device 10, the vehicle lamp assembly and the vehicle provided in the embodiments of the present application are described below in conjunction with the accompanying drawings.

[0099] The vehicle provided in the embodiment of the present application includes a vehicle body and a lamp assembly, wherein the lamp assembly is arranged on the vehicle body and is used to emit illumination light.

[0100] The transportation means in the embodiment of the present application may include but are not limited to vehicles, ships, aircraft, rail trains, etc. The vehicles may include but are not limited to single-wheeled vehicles, two-wheeled vehicles, three-wheeled vehicles, four-wheeled vehicles, etc.

[0101] Figure 2 This is a three-dimensional structural diagram of the first vehicle lamp assembly provided in the embodiment of the present application. Figure 2 As shown, the vehicle lamp assembly includes a vehicle lamp body 20 and a heat sink 10. The vehicle lamp body 20 includes a housing and a light source disposed inside the housing. The heat sink 10 is disposed outside the housing and is used to dissipate heat from the light source.

[0102] Continue to see Figure 2 As shown, since the heat dissipation device 10 is arranged outside the shell, the heat dissipation device 10 dissipates heat from the light source by heat dissipation outside the lamp, which can increase the heat dissipation amount and ensure that the temperature of the light source is within a reasonable range. Of course, the heat dissipation device 10 can also be arranged inside the shell (not shown in the figure), or a part of the heat dissipation device 10 can also be arranged outside the shell and another part can be arranged inside the shell (not shown in the figure).

[0103] In the embodiment of the present application, the heat dissipation device 10 is used to dissipate heat from the light source of the vehicle lamp. However, the heat dissipation device 10 can also be applied to non-vehicles, such as electronic devices that generate heat, such as base stations and servers. In addition, the heat dissipation device 10 can also be used to dissipate heat from heat-generating devices other than light sources, such as processors disposed in electronic devices or vehicles.

[0104] Figure 3 for Figure 2 A three-dimensional structural diagram of the first heat dissipation device, Figure 4 for Figure 3 A front view of the heat sink in FIG. Figure 5 for Figure 4 AA cross-sectional view in the direction of . Figures 3 to 5 As shown, the heat dissipation device 10 provided in the embodiment of the present application includes a fan 200 and a heat dissipation member 100. The heat dissipation member 100 includes a tooth body member 132, a first opening 110 and at least one second opening 120, for example Figure 3 As shown, the heat sink 100 includes a first opening 110 and four second openings 120. The four second openings 120 are arranged along the circumference of the fan 200 (eg, Figure 3 The tooth body 132 is used to increase the heat exchange area between the heat sink 100 and the air, so as to improve the heat dissipation capacity of the heat sink 100. At least part of the tooth body 132 is disposed inside the heat sink 100, for example Figure 3 As shown, a portion of the tooth body 132 is disposed inside the heat sink 100, and another portion is disposed inside the second opening 120. Of course, the tooth body 132 can also be disposed inside the heat sink 100. Figure 3 The at least one second opening 120 is disposed at the same end of the heat sink 100 and is arranged at intervals with the first opening 110. The first opening 110 and the at least one second opening 120 are connected to the inside and outside of the heat sink 100 respectively. The at least one second opening 120 is used to allow air at the second opening 120 to enter the inside of the heat sink 100, and the first opening 110 is used to guide the air inside the heat sink 100. The fan 200 is used to make the air inside the heat sink 100 flow and make the air inside the heat sink 100 be discharged from the first opening 110. The fan 200 includes an air inlet 210 and an air outlet 220. The fan 200 is disposed at the first opening 110. Along the axial direction of the fan 200, the fan 200 and the tooth body 132 are arranged side by side, and the tooth body 132 faces the air inlet 210. The air inlet 210 is used to receive the air inside the heat sink 100, and the air outlet 220 is used to guide the air inside the fan 200.

[0105] Continue to see Figure 3 As shown, the heat sink 100 includes a cavity, and the first opening 110 and the second opening 120 are respectively connected to the cavity. The cavity is connected to the outside of the heat sink 100 through the first opening 110 or the second opening 120, that is, the cavity can be understood as the inside of the heat sink 100. In addition, a part of the tooth body 132 is arranged in the cavity, and the other part is arranged in the second opening 120.

[0106] In the embodiment of the present application, the first opening 110 is functionally equivalent to an air outlet hole connected to the interior of the heat sink 100, and the air inside the heat sink 100 leaves through the first opening 110. The second opening 120 is functionally equivalent to an air inlet hole connected to the interior of the heat sink 100, and the air outside the heat sink 100 enters the interior of the heat sink 100 through the second opening 120.

[0107] Combination Figure 3 and Figure 5 As shown, in the process of heat dissipation of the light source of the vehicle lamp body 20 by the heat dissipation device 10, the outside air (such as Figure 5 The air (in the middle dotted arrow) first enters the interior of the heat sink 100 (the interior of the above-mentioned cavity) through the second opening 120. Under the action of the fan 200, the air inside the heat sink 100 flows and forms an airflow, and the airflow finally leaves the interior of the heat sink 100 through the first opening 110. In this process, the airflow near the tooth body 132 first enters the interior of the fan 200 through the air inlet 210, then leaves through the air outlet 220 and enters the first opening 110, and finally leaves the first opening 110. In addition, during the process of air flowing inside the heat sink 100, the air exchanges heat with the heat sink 100, and the heat generated by the light source received by the heat sink 100 can be transferred to the air, so that the temperature of the air increases and the temperature of the heat sink 100 decreases, so that the heat sink 100 can continuously exchange heat with the light source, thereby ensuring that the temperature of the light source is within a reasonable range.

[0108] Combination Figure 5As shown, the heat sink 100 defines a cavity for accommodating at least part of the tooth body 132, and the cavity is connected to the outside through the first opening 110 and the second opening 120, respectively, so that the air passes through the tooth body 132 from the second opening 120 along the axial direction of the fan 200 and then leaves from the first opening 110 under the action of the fan 200, so that the airflow velocity of the tooth body 132 at various locations in the axial direction of the fan 200 is within a reasonable range, and the temperature at various locations of the tooth body 132 is balanced, so that the heat dissipation effect at various locations of the tooth body 132 is not much different, thereby improving the heat dissipation capacity of the heat sink 100. In other words, since the air enters the interior of the heat sink 100 from the second opening 120 and leaves from the first opening 110, it is avoided that the air inside the heat sink 100 stays for a long time, thereby causing the temperature difference at various locations of the tooth body 132 to be too large, thereby improving the heat dissipation effect of the heat sink 100.

[0109] In addition, the noise generated when the airflow flows inside the heat sink 100 can be shielded by the heat sink 100, so that the external noise transmitted to the heat sink 100 is weakened, thereby achieving the purpose of reducing noise.

[0110] Continue to see Figure 5 As shown, along the axial direction of the fan 200, the air inlet 210 is spaced from the tooth body 132, and the spacing between the tooth body 132 and the air inlet 210 is greater than or equal to 2 mm. The specific size of the spacing between the tooth body 132 and the air inlet 210 is not limited here, for example, it can include but is not limited to 2.5 mm, 2.69 mm, 3 mm, 3.5 mm, etc.

[0111] Continue to see Figure 5 As shown, the flow direction of the airflow inside the heat sink 100 before entering the air inlet 210 is substantially parallel to the axial direction of the fan 200. After entering the fan 200 through the air inlet 210, the flow direction of the airflow is offset. If the airflow inside the heat sink 100 enters the air inlet 210 immediately after passing through the tooth body 132, noise will be generated. However, if Figure 5 As shown, along the axial direction of the fan 200, there is a gap between the air inlet 210 and the tooth body 132, and the distance between the air inlet 210 and the tooth body 132 in the axial direction of the fan 200 (as shown in FIG. Figure 5 The diameter of the tooth t is greater than or equal to 2 mm, so that there is a space for mixing air between the air inlet 210 and the tooth body 132, that is, there is a transition space between the air inlet 210 and the tooth body 132, which can avoid sudden changes in the air flow and further reduce noise.

[0112] In a possible implementation, at least a portion of the fan 200 is disposed inside the heat sink 100, for example Figure 5As shown, the fan 200 is disposed inside the heat sink 100. Of course, a portion of the fan 200 may be disposed inside the heat sink 100 and a portion of the fan 200 may be disposed outside the heat sink 100. The air inlet 210 is disposed inside the heat sink 100, and the air outlet 220 is disposed inside the heat sink 100 and communicates with the first opening 110. Figure 5 As shown, air enters the interior of the heat sink 100 through the second opening 120 and forms an airflow, which enters the interior of the fan 200 through the air outlet 220 and enters the first opening 110 from the air outlet 220 of the fan 200, and finally flows to the outside of the heat sink 100 to take away the heat. Therefore, the air inside the heat sink 100 enters the first opening 110 through the fan 200.

[0113] like Figure 5 As shown, when the fan 200 is disposed inside the heat sink 100, the noise generated by the interaction between the airflow and the blades of the fan 200 can also be shielded by the heat sink 100. In addition, at least a portion of the fan 200 is disposed inside the heat sink 100, which can not only improve the heat dissipation capacity of the heat sink 10 and reduce noise, but also reduce the size of the heat sink 10 in the axial direction of the fan 200, thereby facilitating miniaturization.

[0114] Continue to see Figures 3 to 5 As shown, the heat sink 100 includes a first air guide 140 and a heat sink 130. At least part of the fan 200 is disposed inside the first air guide 140, for example Figure 5 As shown, the fan 200 is disposed inside the first air guide 140. Of course, a portion of the fan 200 may be disposed inside the first air guide 140 and another portion may be disposed outside the first air guide 140. A portion of the heat sink 130 is disposed inside the first air guide 140. Along the axial direction of the fan 200, one end of the first air guide 140 includes a first opening 110 or one end of the first air guide 140 and the heat sink 130 surround the first opening 110, and the other end of the first air guide 140 and the heat sink 130 surround at least one second opening 120, for example Figure 3 As shown, one end of the first air guide 140 includes a first opening 110, and the other end of the first air guide 140 and the radiator 130 are surrounded by a plurality of second openings 120, and the plurality of second openings 120 are arranged at intervals along the circumference of the fan 200. Accordingly, the heat sink 100 formed by the first air guide 140 and the radiator 130 cooperates with the fan 200, which can improve the heat dissipation capacity of the heat dissipation device 10 and reduce noise. In addition, the radiator 130 can adopt an existing radiator 130, such as a fin-type radiator, which helps to reduce the design difficulty of the heat dissipation device 10 and can also reduce the cost of the heat dissipation device 10.

[0115] Figure 6for Figure 5 The three-dimensional structure diagram of the first type of radiator, Figure 7 for Figure 6 The front view of the heat sink is shown. Figure 8 for Figure 6 The top view of the heat sink is shown in Figure 1. Figures 3 to 5 , and see Figures 6 to 8 As shown, the heat sink 130 includes a main body 131 and a tooth body 132. The main body 131 is used to contact the device to be cooled, such as Figure 2 As shown, the heat sink 130 is used to contact the light source to dissipate heat from the light source. At least part of the tooth body 132 is disposed inside the first air guide member 140, for example Figure 5 As shown, a portion of the tooth body 132 is disposed inside the first air guide 140, and another portion is disposed outside the first air guide 140. Of course, the tooth body 132 can also be disposed inside the first air guide 140. Along the axial direction of the fan 200, one end of the tooth body 132 is close to the fan 200, and the other end of the tooth body 132 is connected to the main body 131. The first air guide 140 and the tooth body 132 are disposed on the same side of the main body 131.

[0116] Continue to see Figure 6 and Figure 7 As shown, the main body 131 and the tooth body 132 are an integral structure. Of course, the main body 131 and the tooth body 132 can also be a split structure, and the main body 131 and the tooth body 132 are connected by threaded connection, welding or clamping. However, when the main body 131 and the tooth body 132 are an integral structure, the connection strength between the main body 131 and the tooth body 132 can be improved, and the service life of the heat sink 130 can be improved. In addition, the difficulty of heat transfer from the main body 131 to the tooth body 132 can be reduced, and the heat dissipation capacity of the heat sink 100 is guaranteed.

[0117] The specific structure of the main body 131 is not limited here. Figure 3 , and see Figure 6 and Figure 7 As shown, the main body 131 may include a main body 1311 and a plurality of connecting parts 1312. In the axial direction of the fan 200, the plurality of connecting parts 1312 and the tooth body 132 are arranged on the same side of the main body 1311. In the axial direction of the fan 200, the plurality of connecting parts 1312 surround the tooth body 132. The connecting part 1312 is used to connect with the fastener 173, and the fastener 173 is used to fix the first air guide 140 to the main body 131. The specific structure of the fastener 173 is not limited here, for example Figure 5As shown, along the axial direction of the fan 200 , the fastener 173 is a bolt, the first air guide 140 has a first hole for the fastener 173 to pass through, the fan 200 has a second hole, the fastener 173 passes through the first hole and the second hole in sequence, and is finally threadedly connected to the connecting portion 1312 .

[0118] Of course, the main body 131 may also be other structures. For example, the main body 131 may also remove the connecting portion 1312. In this case, the main body 131 includes the body portion 1311. In addition, when the connecting portion 1312 is removed from the main body 131, in one embodiment, the tooth body 132 may also include a plurality of heat dissipation tooth portions 1321 and a plurality of connecting portions 1312. The plurality of heat dissipation tooth portions 1321 are used to increase the heat exchange area between the heat sink 100 and the air, and the connecting portion 1312 is used to connect the radiator 130 to the first air guide 140. Or in one embodiment, the radiator 130 may also include the main body 131, the tooth body 132 and the connecting portion 1312. The connecting portion 1312 and the tooth body 132 are arranged on the same side of the main body 131.

[0119] In addition, the connection portion 1312 can not only be connected to the fastener 173, but also perform heat exchange with the air to transfer the heat generated by the light source to the air.

[0120] The specific structure of the connecting portion 1312 is not limited here. Figure 3 , Figure 7 and Figure 8 As shown, each connection part 1312 may include a rod-shaped segment 13121 and a plurality of plate-shaped segments 13122. Among them, along the circumference of the fan 200, a plurality of plate-shaped segments 13122 are arranged around the rod-shaped segment 13121, one end of the rod-shaped segment 13121 is connected to the main body 1311 of the main body 131, and the other end of the rod-shaped segment 13121 includes a threaded hole connected to the fastener 173, and a plurality of plate-shaped segments 13122 are arranged outside the first air guide 140. The connection part 1312 with such a structure can not only be connected to the fastener 173, but also increase the heat exchange area between the connection part 1312 and the air, thereby further improving the heat dissipation capacity of the heat sink 100.

[0121] Continue to see Figures 6 to 8 As shown, the tooth body 132 includes a plurality of heat dissipation tooth portions 1321. The plurality of heat dissipation tooth portions 1321 are arranged on the same side of the main body 131 along the axial direction of the fan 200. Each second opening 120 corresponds to a plurality of heat dissipation tooth portions 1321 arranged at intervals along the circumferential direction of the fan 200 (e.g., Figure 3 or Figure 4 As shown in FIG. 1 ), a portion of each heat dissipation tooth portion 1321 is disposed inside the heat dissipation element 100 and another portion is disposed inside the corresponding second opening 120 (as shown in FIG. 1 ). Figure 5Of course, each heat dissipation tooth portion 1321 may also be disposed inside the heat dissipation element 100 . In other words, the inside of each second opening 120 is not disposed at the corresponding heat dissipation tooth portion 1321 .

[0122] The specific structure of the heat dissipation tooth portion 1321 is not limited here. Figure 5 As shown, each heat dissipation tooth portion 1321 is an L-shaped plate structure, the vertical end of each heat dissipation tooth portion 1321 is arranged inside the heat dissipation element 100, and the horizontal end of each heat dissipation tooth portion 1321 is arranged inside the corresponding second opening 120.

[0123] It is understandable that each heat dissipation tooth portion 1321 is disposed inside the heat dissipation element 100 or each heat dissipation tooth portion 1321 is partially disposed inside the heat dissipation element 100 and the other portion is disposed outside the heat dissipation element 100, which can increase the heat exchange area between the heat dissipation element 100 and the air to improve the heat dissipation capacity. However, each heat dissipation tooth portion 1321 is partially disposed inside the heat dissipation element 100 and the other portion is disposed outside the heat dissipation element 100, which can further increase the heat exchange area between the heat dissipation element 100 and the air.

[0124] The specific structure of the tooth body 132 is not limited here. Figure 8 As shown, the tooth body 132 includes a plurality of heat dissipation tooth portions 1321, and the plurality of heat dissipation tooth portions 1321 are divided into four parts, each part having a plurality of heat dissipation tooth portions 1321, and the plurality of heat dissipation tooth portions 1321 of each part are arranged side by side and at intervals along a direction perpendicular to the axial direction of the fan 200, and there is a gap between two adjacent heat dissipation tooth portions 1321, so as to increase the heat exchange area between each heat dissipation tooth portion 1321 and the air.

[0125] Fig. 9 A cross-sectional view of a second heat sink provided in an embodiment of the present application. Fig. 9 As shown, the tooth body 132 includes a plurality of heat dissipation tooth portions 1321 . Along the radial direction of the fan 200 , the plurality of heat dissipation tooth portions 1321 are arranged side by side and at intervals, and a gap exists between two adjacent heat dissipation tooth portions 1321 .

[0126] Fig.10 A cross-sectional view of a third heat sink provided in an embodiment of the present application. Fig.10 As shown, the tooth body 132 includes a plurality of heat dissipation tooth portions 1321 . Along the circumference of the fan 200 , the plurality of heat dissipation tooth portions 1321 are arranged at intervals, and a gap exists between two adjacent heat dissipation tooth portions 1321 .

[0127] Fig.11 A cross-sectional view of a fourth heat sink provided in an embodiment of the present application. Fig.11As shown, the tooth body 132 may also include a middle heat dissipation group and two edge heat dissipation groups, along the first direction (such as Fig.11 The middle heat dissipation group includes a plurality of heat dissipation teeth arranged side by side and at intervals along the first direction, and each edge heat dissipation group includes a plurality of heat dissipation teeth arranged along the second direction (such as Fig.11 The first direction, the second direction and the axial direction of the fan 200 are perpendicular to each other.

[0128] Fig.12 A cross-sectional view of another tooth body member provided in an embodiment of the present application. Fig.12 As shown, the tooth body 132 includes a plurality of heat dissipation tooth portions 1321 , and the plurality of heat dissipation tooth portions 1321 are arranged in a two-dimensional array along a first direction and a second direction, and there is a gap between two adjacent heat dissipation tooth portions 1321 .

[0129] Fig.13 A cross-sectional view of another tooth body member provided in an embodiment of the present application. Fig.13 As shown, the tooth body 132 includes at least one tube body portion 1322 and multiple heat dissipation tooth portions 1321, each tube body portion 1322 corresponds to multiple heat dissipation tooth portions 1321, each heat dissipation tooth portion 1321 is sleeved on the outer wall of the corresponding tube body portion 1322, and the interior of each tube body portion 1322 is used for air to pass through.

[0130] It should be noted that see Figure 3 and Figure 5 As shown, the overall shape of the heat sink 130 is similar to a cuboid. In other words, the projection of the heat sink 130 along the axial direction of the fan 200 is similar to a rectangle. Of course, the overall shape of the heat sink 130 may also be other shapes, and the projection of the heat sink 130 along the axial direction of the fan 200 may also include but not limited to regular or irregular shapes such as a circle (such as shown in FIG. 10 ), an ellipse, or a triangle.

[0131] In the embodiment of the present application, there is no limitation on the specific structure of the first air guide 140. As long as the first air guide 140 and the heat sink 130 form a cavity of the heat sink 100 that at least partially accommodates the tooth body 132, and the first opening 110 and the second opening 120 that are connected to the cavity, it will be sufficient.

[0132] Fig.14 for Figure 3 A three-dimensional structural diagram of the first first air guide member in FIG. Fig.15 for Fig.14 A top view of the first air guide member shown in FIG. Fig.16 for Fig.14In some possible implementations, in combination with the front view of the first air guide member shown in FIG. Figures 3 to 5 , and see Figures 14 to 16 As shown, the first air guide 140 includes a first main body portion 144 and a plurality of first cantilever portions 141, for example Fig.14 As shown, the number of the first cantilever portions 141 is four. Of course, the number of the first cantilever portions 141 may include but is not limited to four. Along the axial direction of the fan 200, the fan 200 is disposed between the first main body portion 144 and the tooth body member 132, and the first main body portion 144 includes a first opening 110. Along the circumference of the fan 200, a plurality of first cantilever portions 141 surround the fan 200 and surround the heat sink 130, and a first cantilever portion 141 is disposed between two adjacent connecting portions 1312. Along the radial direction of the fan 200, a portion of the projection of each first cantilever portion 141 overlaps with a portion of the projection of the tooth body member 132, and another portion overlaps with a portion of the projection of the fan 200. Along the axial direction of the fan 200, a plurality of first cantilever portions 141 are connected to the same side of the first main body portion 144, and the other end of each first cantilever portion 141 and the heat sink 130 together enclose at least one second opening 120, for example Figure 5 As shown, each first cantilever portion 141 and the heat sink 130 jointly define a second opening 120 . Of course, the number of second openings 120 jointly defined by the other end of each first cantilever portion 141 and the heat sink 130 is not limited to one.

[0133] See also Figure 5 As shown, each first cantilever portion 141 shields part of the tooth body 132 along the radial direction of the fan 200, so that the first air guide 140 and the heat sink 130 can form a cavity that accommodates at least part of the tooth body 132, and the cavity is connected to the first opening 110 and the second opening 120, so that air can pass through the tooth body 132 and leave from the first opening 110, thereby improving the heat dissipation capacity of the heat dissipation device 10. In addition, multiple first cantilever portions 141 are connected to the same side of the first main body portion 144, so that the first cantilever portion 141 and the first main body portion 144 are an integral structure, which can improve the production efficiency of the first air guide 140, for example, the first air guide 140 can be integrally formed by stamping. In addition, the number of assembly times of the heat dissipation device 10 can also be reduced to improve the assembly efficiency of the heat dissipation device 10.

[0134] See also Figure 3 and Figure 5As shown, the other end of each first cantilever portion 141 and the main body 131 together enclose a second opening 120. Specifically, along the axial direction of the fan 200, the other end of each first cantilever portion 141 is spaced apart from the main body 1311, and each first cantilever portion 141, the main body 1311 and the corresponding two connecting portions 1312 together define a second opening 120. It should be noted that each first cantilever portion 141 and the corresponding connecting portion 1312 may be in contact or clearance fit in the radial direction of the fan 200, and when each first cantilever portion 141 and the corresponding connecting portion 1312 are clearance fit, the gap between the first cantilever portion 141 and the connecting portion 1312 will not affect the air entering and exiting the interior of the heat sink 100. In addition, the gap between the first cantilever portion 141 and the connecting portion 1312 in the radial direction of the fan 200 can make the first opening 110 connected or disconnected with the second opening 120, but it will not affect the flow path of air entering the interior of the heat sink 100 from the second opening 120 and leaving the first opening 110. In other words, the air inside the heat sink 100 basically leaves through the first opening 110 and enters through the second opening 120.

[0135] Continue to see Figure 3 and Figure 5 As shown, each second opening 120 is enclosed by the first cantilever portion 141 and the main body 131. However, each second opening 120 can also be enclosed by the first cantilever portion 141, the main body 131 and the tooth body portion 132. For example, when the tooth body portion 132 includes a heat dissipation tooth portion 1321 and a connecting portion 1312, and the main body 131 includes a main body portion 1311, the other end of each first cantilever portion 141 and the connecting portion 1312 of the main body portion 131 and the tooth body portion 132 together enclose a second opening 120.

[0136] Continue to see Figure 5 As shown, along the radial direction of the fan 200 , there is a gap between each first cantilever portion 141 and the tooth member 132 .

[0137] Or in one embodiment, along the radial direction of the fan 200, each first cantilever portion 141 may also contact the tooth body member 132 (not shown in the figure). In the radial direction of the fan 200, each first cantilever portion 141 may abut against the tooth body member 132, or each first cantilever portion 141 may contact and not abut against the tooth body member 132.

[0138] In summary, whether each first cantilever portion 141 is in contact with the tooth body part 132 or not, a cavity that accommodates at least part of the tooth body part 132 can be defined to improve the heat dissipation capacity of the heat dissipation device 10 and reduce noise. However, by spacing each first cantilever portion 141 from the tooth body part 132, noise can be avoided from being generated by collision between the first cantilever portion 141 and the tooth body part 132 when the heat dissipation device 10 shakes. Of course, if the first cantilever portion 141 is in contact with the tooth body part 132, each first cantilever portion 141 can also be fixed to the tooth body part 132 by a fixing member (not shown in the figure), so that noise can also be avoided.

[0139] In some possible implementations, each first cantilever portion 141 may satisfy the relationship: 1 / 3H≤L1≤2 / 3H, where H is the height of the heat sink 130 in the axial direction of the fan 200, and L1 is the relative length between each first cantilever portion 141 and the heat sink 130, and the relative length refers to the relative distance between the tooth body 132 and the first cantilever portion 141 in the radial direction of the fan 200 along the axial direction of the fan 200. With such a configuration, it can be ensured that the amount of air entering the interior of the heat sink 100 meets the requirements, and the heat of the heat sink 100 is taken away in time, thereby ensuring that the temperature of the heat sink 100 is within a reasonable range, thereby ensuring the heat dissipation effect of the heat sink 100. In addition, the air flow can also be improved and the noise can be reduced.

[0140] There is no limitation on the specific value of the relative length between each first cantilever portion 141 and the heat sink 130. For example, it may include but is not limited to 1 / 3H, 0.4H, 0.45H, 0.478H, 0.5H, 0.54H, 0.56H, 2 / 3H, etc. Among them, when the relative length L1 between each first cantilever portion 141 and the heat sink 130 is 0.54H, the air volume entering the heat sink 100 and the noise generated by the air passing through the second opening 120 can be effectively balanced, which can not only meet the heat dissipation requirements of the heat sink 100 and thus improve the heat dissipation capacity of the heat sink 10, but also control the noise within a reasonable range.

[0141] In the embodiment of the present application, the specific structure of each first cantilever portion 141 is not limited here. Fig.14 As shown, each first cantilever portion 141 is a flat plate-shaped structure. In some embodiments, each first cantilever portion 141 may also be an arc-shaped plate-shaped structure (not shown in the figure).

[0142] For a possible implementation, see Figure 5 and Fig.16As shown, each first cantilever portion 141 may include a first portion 1411 and a second portion 1412. In the axial direction of the fan 200, the first portion 1411 is close to the fan 200, and the second portion 1412 is close to the tooth body 132. In this way, each first cantilever portion 141 is a stepped plate-like structure, so that the structure of each first cantilever portion 141 matches the structure of the fan 200 and the heat sink 130, which helps to reduce the volume of the heat sink 10.

[0143] Continue to see Figure 5 and Fig.16 As shown, along the radial direction of the fan 200, the first surface A1 of the first portion 1411 facing the fan 200 intersects with the second surface A2 of the second portion 1412 facing the tooth body 132, the first surface A1 is arranged between the second surface A2 and the fan 200, and the angle between the first surface A1 and the second surface A2 is a rounded angle (such as Figure 5 Such arrangement can avoid sudden changes in the airflow formed by the air inside the heat sink 100 when it moves along the first cantilever portion 141, so that the airflow flows smoothly from the second opening 120 to the first opening 110, which can further reduce noise.

[0144] In some possible implementations, combined with Figure 5 , Fig.14 and Fig.16 As shown, the first air guide 140 may further include a plurality of filling portions 142, and the plurality of filling portions 142 correspond to the plurality of first cantilever portions 141 one by one, for example Figure 5 As shown, the number of the first cantilever parts 141 is four, and the number of the filling parts 142 is also four. Each filling part 142 fills the gap between the fan 200 and the corresponding first cantilever part 141 in the radial direction of the fan 200. In this way, the gap between the first cantilever part 141 and the fan 200 in the radial direction of the fan 200 can be reduced, even to zero, and the air in the gap between the first cantilever part 141 and the fan 200 can be prevented from being sucked back under the action of the fan 200, generating backflow or large-scale vortex at the air inlet 210, which can further reduce noise.

[0145] Continue to see Fig.14 and Fig.16 As shown, each filling portion 142 is an integral structure with the corresponding first cantilever portion 141, which can reduce the number of parts of the heat sink 10 and improve the assembly efficiency of the heat sink 10. In addition, the structure of the fan 200 does not need to be changed, so the existing fan 200 can be used, thereby reducing costs.

[0146] Of course, each filling portion 142 can also be an integrated structure with the fan 200 (not shown in the figure), which can also reduce the number of parts of the heat dissipation device 10 and improve the assembly efficiency of the heat dissipation device 10. Alternatively, each filling portion 142 can be detachably filled between the corresponding first cantilever portion 141 and the fan 200 (not shown in the figure), that is, each filling portion 142 is equivalent to a separate part.

[0147] In the embodiment of the present application, the specific structure of the filling part 142 is not limited here. For example, each filling part 142 is a plate-shaped structure. Figure 5 , Fig.14 and Fig.16 As shown, each filling portion 142 may also be formed by the corresponding first cantilever portion 141 being recessed from the outside to the inside, so that the first air guide member 140 may be integrally formed.

[0148] In some possible implementations, see Figure 3 , Fig.14 and Fig.15 As shown, the first air guide 140 may further include a hand-hitting prevention portion 145. The hand-hitting prevention portion 145 is disposed at the first opening 110, and the hand-hitting prevention portion 145 includes an air outlet structure 171 connected to the first opening 110. The air outlet structure 171 may prevent the hand-hitting prevention portion 145 from obstructing air from being discharged from the first opening 110. This arrangement may prevent the user's fingers from passing through the first opening 110 and contacting the blades of the fan 200, thereby preventing the user's fingers from being injured.

[0149] Continue to see Fig.14 As shown, the hand-protecting portion 145 is disposed inside the first opening 110, which can reduce the size of the heat sink 10 in the axial direction of the fan 200, and is conducive to the miniaturization design of the heat sink 10. Of course, the hand-protecting portion can also be disposed outside the first opening 110, which can also prevent the user's fingers from being cut by the blades of the fan 200.

[0150] Continue to see Fig.14 As shown, the hand-hitting protection part 145 is an integral structure with the first main body 144, which can reduce the number of parts of the heat sink 10 to improve the assembly efficiency of the heat sink 10. In addition, it can be manufactured in an integral molding manner, which can improve the production efficiency of the heat sink 10. Of course, the hand-hitting protection part 145 can also be detachably connected to the first main body 144, which can also prevent the user's fingers from being cut by the blades of the fan 200.

[0151] In the embodiment of the present application, the specific structure of the anti-hitting hand portion 145 is not limited here. Fig.14As shown, the hand-protecting part 145 includes two hand-protecting tendons 1451, and the opposite ends of each hand-protecting tendon 1451 are respectively connected to the first main body 144, and the two hand-protecting tendons 1451 intersect and form a cross shape, and the two hand-protecting tendons 1451 define four gaps, and each gap is an air outlet structure 171. Alternatively, the hand-protecting part 145 may also include multiple hand-protecting tendons 1451, and the multiple hand-protecting tendons 1451 are arranged in a two-dimensional array along the first direction and the second direction. In other words, the hand-protecting part 145 may be a mesh structure (not shown in the figure).

[0152] In some possible implementations, combined with Figure 3 , Figure 5 and Fig.14 As shown, the first air guide 140 may further include a plurality of folded edge portions 143, wherein, along the radial direction of the fan 200, each first cantilever portion 141 is provided with a folded edge portion 143 at opposite ends thereof, and at least a portion of the projection of each folded edge portion 143 overlaps with the projection of the fan 200. In this way, it is possible to prevent the edge of each first cantilever portion 141 from cutting the wire electrically connected to the fan 200, thereby ensuring the stable operation of the fan 200. In addition, it is also possible to improve the strength of each first cantilever portion 141 and reduce the risk of deformation of the first cantilever portion 141.

[0153] Continue to see Figure 5 As shown, along the radial direction of the fan 200, the projection of each folded edge portion 143 partially overlaps with the projection of the fan 200 and does not overlap with the projection of the heat sink 130. However, the projection of each folded edge portion 143 may partially overlap with the projection of the fan 200 and partially overlap with the projection of the heat sink 130, which can not only prevent the wires electrically connected to the fan 200 from being cut by the first cantilever portion 141, but also further reduce the risk of deformation of the first cantilever portion 141.

[0154] Of course, in addition to preventing the wire from being cut by providing the folded edge portion 143, in one embodiment, the folded edge portion 143 can also be removed. Accordingly, along the radial direction of the fan 200, the opposite ends of each first cantilever portion 141 are chamfered, which can also prevent each first cantilever portion 141 from cutting the wire.

[0155] Continue to see Figure 5As shown, the heat sink 100 further includes a spacer 150. The spacer 150 is disposed between the tooth body 132 and the fan 200 along the axial direction of the fan 200, and the projection of the spacer 150 does not overlap with the projection of the air inlet 210 at least partially. The spacer 150 is used to make the distance between the air inlet 210 and the tooth body 132 in the axial direction of the fan 200 greater than or equal to 2 mm. Accordingly, by disposing the spacer 150 between the fan 200 and the tooth body 132, it can be ensured that the distance between the air inlet 210 and the tooth body 132 in the axial direction of the fan 200 is at least greater than 2 mm, and it is ensured that there is a transition space between the air inlet 210 and the tooth body 132, which can avoid a large sudden change of air after entering the air inlet 210, so as to reduce noise.

[0156] Continue to see Figure 5 As shown, along the axial direction of the fan 200, the projection of the spacer 150 may also partially overlap with the projection of the air inlet 210, so that the air inside the heat sink 100 can be discharged. Of course, along the axial direction of the fan 200, the projection of the spacer 150 may also not overlap with the projection of the air inlet 210, so that the spacer 150 is decoupled from the air inlet 210, which can further improve the exhaust effect of the fan 200.

[0157] Continue to see Figure 5 As shown, the spacer 150 is detachably disposed between the fan 200 and the tooth body 132, and along the axial direction of the fan 200, the spacer 150 abuts against the fan 200 and the tooth body 132 respectively. With such an arrangement, the structure of the radiator 130 and the fan 200 does not need to be changed, so that the existing radiator 130 and the fan 200 can be used, thereby reducing the design difficulty and cost of the heat dissipation device 10.

[0158] Of course, the spacer 150 may also be an integral structure with one of the tooth body 132 and the fan 200. With such a configuration, the number of parts of the heat sink 10 can be reduced, thereby improving the assembly efficiency of the heat sink 10.

[0159] In the embodiment of the present application, the specific structure of the spacer 150 is not limited here. Figure 5As shown, the spacer 150 may include an annular gasket, which is detachably disposed between the fan 200 and the tooth body 132 along the axial direction of the fan 200 and abuts against the tooth body 132 and the fan 200 respectively, and the thickness of the annular gasket is greater than or equal to 2 mm, which can ensure that the spacing between the air inlet 210 and the tooth body 132 is greater than or equal to 2 mm. Or in one embodiment, the spacer 150 may include a plurality of spacing bosses (not shown in the figure), which are arranged at intervals along the circumference of the fan 200, and each spacing boss abuts against the fan 200 and the tooth body 132 at opposite ends along the circumference of the fan 200 respectively, and the height of each spacing boss in the axial direction of the fan 200 is greater than or equal to 2 mm, so that the spacing between the air inlet 210 and the tooth body 132 is greater than or equal to 2 mm.

[0160] Continue to see Figure 5 As shown, along the axial direction of the fan 200, the air outlet 220 and the air inlet 210 of the fan 200 are arranged side by side and at intervals, and the center line of the air outlet 220 coincides with the center line of the air inlet 210, so the fan 200 is an axial flow fan 200. Of course, the fan 200 can also be a centrifugal fan 200. In this case, the air outlet 220 and the air inlet 210 of the fan 200 are also arranged at intervals along the axial direction of the fan 200, and the center line of the air outlet 220 is perpendicular to the center line of the air inlet 210. In addition, when the fan 200 is a centrifugal fan 200, the air outlet 220 of the fan 200 can be one or more. Among them, when there are multiple air outlets 220, the number of the first openings 110 is also multiple, each air outlet 220 corresponds to a first opening 110 and is connected to the corresponding first opening 110, and multiple air outlets 220 are arranged at intervals along the circumference of the fan 200.

[0161] Fig.17 A cross-sectional view of a second heat dissipation device provided in an embodiment of the present application. Fig.17 and Figure 3 The difference is that the structure of the first air guide 140 is different. Specifically, the first air guide 140 removes the first main body 144 and the hand-protecting part 145, that is, the first air guide 140 includes a plurality of first cantilever parts 141, a plurality of folded edge parts 143 and a plurality of filling parts 142, each first cantilever part 141 corresponds to a filling part 142 and two folded edge parts 143 and is an integral structure with the corresponding filling part 142 and folded edge part 143, and each first cantilever part 141 is connected to the fan 200.

[0162] Continue to see Fig.17, the multiple first cantilever parts 141 are independent of each other, in other words, there is a gap between two adjacent first cantilever parts 141 along the radial direction of the fan 200. At this time, along the axial direction of the fan 200, one end of the multiple first cantilever parts 141 and the connecting part 1312 of the main body 131 jointly define a first opening 110, and the other end of each first cantilever part 141 and the main body 131 define a second opening 120.

[0163] Continue to see Fig.17 As shown, the connection portion 1312 belongs to the main body 131, however, the connection portion 1312 may also belong to the tooth body 132 or be arranged in parallel with the main body 131, so one end of the plurality of first cantilever portions 141 and the heat sink 130 together define a first opening 110. In addition, when the fan 200 is a centrifugal fan 200, one end of the plurality of first cantilever portions 141 and the heat sink 130 may also define a plurality of first openings 110, and the plurality of first openings 110 are arranged at intervals along the circumference of the fan 200.

[0164] See also Figure 3 and Figure 5 As shown, since the first air guide 140 includes a first main body portion 144 having a first opening 110, but in Fig.17 When the first air guide member 140 removes the first main body portion 144, at this time, along the first direction, the multiple first cantilever portions 141 close to one end of the fan 200 jointly enclose at least one first opening 110, or the multiple first cantilever portions 141 close to one end of the fan 200 can also jointly enclose at least one first opening with the radiator 130.

[0165] In a possible implementation, see Fig.17 As shown, the heat dissipation device 10 may further include an anti-hitting member 172, which is disposed at the opening of the fan 200 and connected to the fan 200, and includes an air outlet 220 structure connected to the air outlet 220. This arrangement is to prevent the blades of the fan 200 from cutting the user's fingers.

[0166] Fig.18 A cross-sectional view of a third heat dissipation device provided in an embodiment of the present application. Fig.18 and Figure 3 The difference is that the first air guide 140 includes a first tubular portion 146 with a hollow structure. Part of the heat sink 130 is disposed inside the first tubular portion 146, and the fan 200 is disposed inside the first tubular portion 146. Fig.18In the Y direction), the projection of the tooth body 132 partially overlaps with the projection of the first tubular portion 146. Along the axial direction of the fan 200, the opening of the first tubular portion 146 close to the fan 200 is the first opening 110, and the end of the first tubular portion 146 close to the radiator 130 and the radiator 130 surround at least one second opening 120. Correspondingly, part of the radiator 130 is arranged inside the first tubular portion 146, so that at least part of the tooth body 132 is arranged inside the heat sink 100, which can ensure that air enters the inside of the heat sink 100 from the second opening 120 and leaves the inside of the heat sink 100 from the first opening 110, so as to improve the heat dissipation capacity of the heat sink 10 and reduce noise. In addition, the first air guide 140 can also be matched with radiators 130 of different structures, which can improve the applicability of the first air guide 140.

[0167] It is understandable that, combined with Figure 5 and Fig.18 It can be seen that the first tubular portion 146 can be understood as Figure 5 The multiple first cantilever parts 141 are in an integrated structure.

[0168] Continue to see Fig.18 As shown, in order to realize electrical connection between the wire and the fan 200, the end of the first tubular portion 146 close to the fan 200 may include at least one wire hole 1461 (such as Fig.18 When the first tubular portion 146 includes a wire-passing notch, the wire-passing notch is connected to the first opening 110. When the first tubular portion 146 includes a wire-passing hole 1461, the wire-passing hole 1461 is not connected to the first opening 110. Of course, in order to prevent the edge of the wire-passing hole 1461 or the wire-passing notch from cutting the wire, the edge of the wire-passing hole 1461 or the wire-passing notch may be rounded.

[0169] Continue to see Fig.18 As shown, the first tubular portion 17 may also be a stepped tubular structure, and the inner surface of the step of the first tubular portion 17 may also be rounded to reduce noise.

[0170] Continue to see Fig.18 As shown, a filling portion 142 may also be provided between the first tubular portion 146 and the fan 200. The structure of the filling portion 142 is not limited here.

[0171] Of course, the first air guide 140 may also have a first main body 144, an anti-hitting part 145 and other structures, for example Fig.19 As shown. Among them, Fig.19In addition, when the first air guide 140 has the first main body 144 , the first tubular portion 146 no longer encloses the first opening 110 or no longer encloses the first opening 110 together with the radiator 130 . In this case, the first main body 144 includes the first opening 110 .

[0172] Fig. 20 A three-dimensional structural diagram of a second vehicle lamp assembly provided in an embodiment of the present application, Fig.21 for Fig. 20 The three-dimensional structure diagram of the fifth heat dissipation device, Fig. 22 for Fig. 20 A front view of the heat sink in FIG. Fig.23 for Fig. 22 Cross-sectional view along the BB direction. Fig.23 and Figure 5 The difference is that the structure of the heat sink 100 is different, and the fan 200 is arranged outside the heat sink 100. Among them, the air inlet 210 is used to receive the air guided out of the first opening 110, and the air outlet 220 is also arranged outside the heat sink 100 and is not connected to the first opening 110. When the heat sink 10 is dissipating heat, the air (such as Fig.23 The air (arrow in the middle dashed line) enters the interior of the heat sink 100 from the second opening 120, enters the air inlet 210 of the fan 200 through the first opening 110, and finally is guided out of the heat sink 10 from the air outlet 220. In this way, the structure of the heat sink 100 can be simplified while reducing noise and improving heat dissipation capacity.

[0173] See also Figure 21 to Figure 23 As shown, the heat sink 100 includes a second air guide 160 and a heat sink 130. The heat sink 130 includes a main body 131 and a tooth body 132. The main body 131 is used to contact the device to be cooled. At least part of the tooth body 132 is arranged inside the second air guide 160, for example Fig.23 As shown, a portion of the tooth member 132 is disposed inside the heat sink 100, and another portion is disposed outside the heat sink 100. Of course, the tooth member 132 can also be disposed inside the heat sink 100. Along the axial direction of the fan 200, one end of the tooth member 132 is close to the first opening 110, and the other end of the tooth member 132 is connected to the main body 131. Along the axial direction of the fan 200, one end of the second air guide member 160 includes the first opening 110, and the other end of the second air guide member 160 and the heat sink 130 together enclose at least one second opening 120, for example Fig.21 As shown, the other end of the second air guide 160 and the radiator 130 together define four second openings 120 . Of course, the number of the second openings 120 together defined by the other end of the second air guide 160 and the radiator 130 is not limited to four.

[0174] Fig.24 for Fig.23 A three-dimensional structural diagram of the first second air guide member, Fig.25 for Fig.24 A front view of the second air guide member in FIG. Figure 23 to Figure 25 As shown, the second air guide member 160 includes a second main body portion 162 and a plurality of second cantilever portions 161. In the axial direction of the fan 200, the second main body portion 162 is arranged between the tooth body portion 132 and the fan 200, and the second main body portion 162 includes a first opening 110. In the circumferential direction of the fan 200, a plurality of second cantilever portions 161 surround the radiator 130. In the radial direction of the fan 200, the projection of each second cantilever portion 161 partially overlaps with the projection of the tooth body portion 132. In the axial direction of the fan 200, one end of the plurality of second cantilever portions 161 is connected to the same side of the second main body portion 162, and the other end of each second cantilever portion 161 and the radiator 130 together enclose at least one second opening 120.

[0175] like Fig.23 As shown, each second cantilever portion 161 shields part of the tooth body 132 along the radial direction of the fan 200, so that the second air guide member 160 and the heat sink 130 can form a cavity that accommodates at least part of the tooth body 132, and the cavity is connected to the first opening 110 and the second opening 120, so that air can pass through the tooth body 132 and leave from the first opening 110, thereby improving the heat dissipation capacity of the heat dissipation device 10 and reducing noise. In addition, multiple second cantilever portions 161 are connected to the same side of the second main body portion 162, so that the second cantilever portion 161 and the second main body portion 162 are an integral structure, which can improve the production efficiency of the second air guide member 160, for example, the second air guide member 160 can be integrally formed by stamping. In addition, the number of assembly times of the heat dissipation device 10 can also be reduced to improve the assembly efficiency of the heat dissipation device 10.

[0176] Continue to see Fig. 22 and Fig.23 As shown, the other end of each second cantilever portion 161 and the main body 131 together define a second opening 120. Specifically, along the axial direction of the fan 200, the other end of each second cantilever portion 161 is spaced apart from the main body 1311, and each second cantilever portion 161, the main body 1311 and the corresponding two connecting portions 1312 together define a second opening 120.

[0177] Continue to see Fig. 22 and Fig.23As shown, each second opening 120 is enclosed by the second cantilever portion 161 and the main body 131. However, each second opening 120 can also be enclosed by the second cantilever portion 161, the main body 131 and the tooth body portion 132. For example, when the tooth body portion 132 includes a heat dissipation tooth portion 1321 and a connecting portion 1312, and the main body 131 includes a main body portion 1311, the other end of each second cantilever portion 161 and the connecting portion 1312 of the main body portion 131 and the tooth body portion 132 together enclose a second opening 120.

[0178] like Fig.23 As shown, the second main body portion 162 includes a first opening 110, that is, the end of the second air guide 160 close to the fan 200 along the axial direction of the fan 200 includes the first opening 110, however, the end of the second air guide 160 close to the fan 200 along the axial direction of the fan 200 can also be jointly enclosed with the radiator 130 to form at least one first opening 110.

[0179] Continue to see Fig.23 As shown, along the radial direction of the fan 200 , there is a gap between each first cantilever portion 141 and the tooth member 132 .

[0180] Or in one embodiment, along the radial direction of the fan 200, each second cantilever portion 161 may also contact the tooth body part 132. In the radial direction of the fan 200, each second cantilever portion 161 may abut against the tooth body part 132, or each second cantilever portion 161 may contact and not abut against the tooth body part 132.

[0181] In summary, each second cantilever portion 161 can define a cavity that accommodates at least part of the tooth body 132, whether in contact or not, to improve the heat dissipation capacity of the heat dissipation device 10. However, by spacing each second cantilever portion 161 from the tooth body 132, noise can be avoided from being generated by collision between the second cantilever portion 161 and the tooth body 132 when the heat dissipation device 10 shakes. Of course, if each second cantilever portion 161 is fixed to the tooth body 132 by a fixing member (not shown in the figure) when the second cantilever portion 161 is in contact with the tooth body 132, noise can also be avoided.

[0182] In some possible implementations, each second cantilever portion 161 may satisfy the relationship: 1 / 3H≤L2≤2 / 3H, where H is the height of the heat sink 130 in the axial direction of the fan 200, and L2 is the relative length between each second cantilever portion 161 and the heat sink 130, and the relative length refers to the relative distance between the tooth body 132 and the second cantilever portion 161 in the radial direction of the fan 200 along the axial direction of the fan 200. With such a configuration, it can be ensured that the amount of air entering the interior of the heat sink 100 meets the requirements, and the heat of the heat sink 100 is taken away in time, thereby ensuring that the temperature of the heat sink 100 is within a reasonable range, thereby ensuring the heat dissipation effect of the heat sink 100. In addition, the flow of air can also be improved, which can further reduce noise.

[0183] There is no limitation on the relative length between each second cantilever portion 161 and the heat sink 130. For example, it may include but is not limited to 1 / 3H, 0.4H, 0.45H, 0.478H, 0.5H, 0.54H, 0.56H, 2 / 3H, etc. Among them, when the relative length L2 between each second cantilever portion 161 and the heat sink 130 is 0.54H, the air volume entering the heat sink 100 and the noise generated by the air passing through the second opening 120 can be effectively balanced, which can not only meet the heat dissipation requirements of the heat sink 100 and thus improve the heat dissipation capacity of the heat sink 10, but also control the noise within a reasonable range.

[0184] In the embodiment of the present application, the specific structure of each second cantilever portion 161 is not limited here. Fig.24 and Fig.25 As shown, each second cantilever portion 161 is a flat plate-shaped structure. In some embodiments, each second cantilever portion 161 may also be an arc-shaped plate-shaped structure.

[0185] In some possible implementations, combined with Fig.23 and Fig.25 As shown, the third surface A3 of each second cantilever portion 161 facing the tooth body 132 along the radial direction of the fan 200 intersects with the fourth surface A4 of the second main body portion 162 facing the tooth body 132 along the axial direction of the fan 200, and the angle between the third surface A3 and the fourth surface A4 can be a rounded angle (such as Fig.23 or Fig.25 Such arrangement can avoid sudden changes in the airflow formed by the air inside the heat sink when it moves along the second cantilever portion 161, so that the airflow flows smoothly from the second opening 120 to the first opening 110, thereby further reducing noise.

[0186] In some possible implementations, along the axial direction of the fan 200, the second body portion 162 abuts against the fan 200 and the tooth member 132, respectively, and the thickness of the second body portion 162 (eg Fig.23 t in the figure) is greater than or equal to 2 mm. Accordingly, the second main body 162 is respectively in contact with the fan 200 and the tooth body 132, so that the distance between the air inlet 210 and the tooth body 132 in the axial direction of the fan 200 is greater than or equal to 2 mm, so as to ensure that there is a transition space for air to pass between the air inlet 210 and the tooth body 132, thereby achieving the purpose of reducing noise. In addition, the number of parts of the heat sink 10 can also be reduced. Even without changing the structure of the radiator 130 and the fan 200, the design difficulty of the heat sink 10 can be reduced.

[0187] In some possible implementations, the heat dissipation device 10 may further include an anti-hitting piece 172 (not shown in the figure), which is disposed at the opening of the fan 200 and connected to the fan 200 , and the anti-hitting piece 172 includes an air outlet 220 structure connected to the air outlet 220 .

[0188] In summary, since the fan 200 is disposed outside the heat sink 100, there is no gap between the fan 200 and the second air guide 160 in the radial direction of the fan 200, so no backflow occurs. In addition, the fan 200 may be an axial flow fan 200 or a centrifugal fan 200. In addition, the specific structure of the heat sink 130 and the fan 200 may refer to Figure 3 The description about the heat sink 130 and the fan 200 is not limited here.

[0189] Fig.26 A cross-sectional view of a sixth heat dissipation device provided in an embodiment of the present application. Fig.26 and Fig.23 The difference is that the structure of the second air guide 160 is different. Specifically, the second air guide 160 includes a second main body 162 and a second tubular portion 163 with a hollow structure, a portion of the radiator 130 is arranged inside the second tubular portion 163, and the fan 200 is arranged outside the second tubular portion 163. Along the radial direction of the fan 200, the projection of the tooth body 132 partially overlaps with the projection of the second tubular portion 163. Along the axial direction of the fan 200, the opening of the second tubular portion 163 close to the fan 200 is the first opening 110, and one end of the second tubular portion 163 close to the radiator 130 and the radiator 130 surround at least one second opening 120. Accordingly, part of the heat sink 130 is disposed inside the second tubular portion 163, so that at least part of the tooth body member 132 is disposed inside the heat sink 100, which can ensure that air enters the interior of the heat sink 100 from the second opening 120 and leaves the interior of the heat sink 100 from the first opening 110, so as to improve the heat dissipation capacity of the heat sink 10. In addition, the second air guide member 160 can also be matched with heat sinks 130 of different structures, which can improve the applicability of the second air guide member 160.

[0190] It can be understood that the second tubular portion 163 can be understood as Fig.23 The plurality of second cantilever portions 161 are in an integrated structure.

[0191] Continue to see Fig.26 As shown, the heat dissipation device 10 may further include an anti-hand-hitting member 172 disposed at the air outlet 220 , and the anti-hand-hitting member 172 has an air outlet structure 171 communicated with the air outlet 220 .

[0192] In the above description, any one of the first cantilever portion 141, the second cantilever portion 161, the first tubular portion 146 and the second tubular portion 163 is detachable relative to the radiator 130, that is, any one of the first cantilever portion 141, the second cantilever portion 161, the first tubular portion 146 and the second tubular portion 163 is a separate structure from the radiator 130, however, any one of the first cantilever portion 141, the second cantilever portion 161, the first tubular portion 146 and the second tubular portion 163 can also be an integral structure with the radiator 130, for example Fig. 27 As shown, Fig. 27 A cross-sectional view of a seventh heat dissipation device provided in an embodiment of the present application, Fig. 27 and Figure 5 The difference is that the first cantilever portion 141 and the tooth body 132 are an integral structure, that is, the first cantilever portion 141 and the heat sink 130 are an integral structure.

[0193] In the above description, along the radial direction of the fan 200, the projection of the tooth body member 132 partially overlaps with the projection of any one of the first air guide member 140 and the second air guide member 160, however, the projection of the tooth body member 132 may not overlap with the projection of any one of the first air guide member 140 and the second air guide member 160, for example Fig.28 As shown, Fig.28 This is a cross-sectional view of an eighth heat dissipation device provided in an embodiment of the present application. Fig.28 and Figure 5 The difference is that, along the radial direction of the fan 200 , the projection of the tooth body member 132 does not overlap with the projection of the first air guide member 140 .

[0194] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0195] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0196] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0197] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0198] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0199] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A heat dissipation device, characterized in that: Includes fans and heat sinks; The heat sink comprises a tooth body, a first opening and at least one second opening, and at least a portion of the tooth body is disposed inside the heat sink; Along the axial direction of the fan, the at least one second opening is arranged at the same end of the heat sink and is spaced apart from the first opening, the first opening and the at least one second opening are respectively connected to the inside and the outside of the heat sink, the at least one second opening is used for allowing air at the second opening to enter the inside of the heat sink, and the first opening is used for guiding air out of the inside of the heat sink; The fan is arranged at the first opening. Along the axial direction of the fan, the fan and the tooth body are arranged side by side. The fan includes an air inlet facing the tooth body, and the air inlet is used to receive air derived from the first opening or air inside the heat sink.

2. The heat dissipation device according to claim 1, characterized in that: Along the axial direction of the fan, the distance between the tooth body and the air inlet is greater than or equal to 2 mm.

3. The heat dissipation device according to claim 1 or 2, characterized in that: At least part of the fan is disposed inside the heat sink, the air inlet is disposed inside the heat sink, and the fan further includes an air outlet connected to the first opening, and air inside the heat sink enters the first opening through the fan.

4. The heat dissipation device according to claim 3, characterized in that: The heat sink comprises a first air guide and a heat sink, and at least a portion of the fan is disposed inside the first air guide; The heat sink comprises a main body and the tooth body, wherein the main body is used to contact with the device to be cooled; At least a portion of the tooth body is disposed inside the first air guide member, and along the axial direction of the fan, one end of the tooth body is close to the fan, and the other end of the tooth body is connected to the main body; Along the axial direction of the fan, one end of the first air guide member includes the first opening or one end of the first air guide member and the heat sink surround the first opening, and the other end of the first air guide member and the heat sink surround the at least one second opening.

5. The heat dissipation device according to claim 4, characterized in that: The first air guide member includes a plurality of first cantilever portions; Along the circumference of the fan, the plurality of first cantilever portions surround the fan and the heat sink; Along the radial direction of the fan, a portion of the projection of each first cantilever portion overlaps with a portion of the projection of the tooth body, and another portion overlaps with a portion of the projection of the fan; Along the axial direction of the fan, one end of the multiple first cantilever parts jointly enclose the first opening, or one end of the multiple first cantilever parts and the radiator jointly enclose the first opening, and the other end of each first cantilever part and the radiator jointly enclose at least one second opening.

6. The heat dissipation device according to claim 5, characterized in that: Along the radial direction of the fan, there is a gap between each of the first cantilever portions and the tooth body member.

7. The heat dissipation device according to claim 5 or 6, characterized in that: Each of the first cantilevered portions comprises a first portion and a second portion; Along the axial direction of the fan, the first portion is close to the fan, and the second portion is close to the gear member; Along the radial direction of the fan, a first surface of the first portion facing the fan intersects with a second surface of the second portion facing the tooth member, the first surface is arranged between the second surface and the fan, and an angle between the first surface and the second surface is a rounded angle.

8. The heat dissipation device according to any one of claims 5 to 7, characterized in that: The first air guide member further includes a plurality of filling portions, the plurality of filling portions corresponding to the plurality of first cantilever portions one by one, and each of the filling portions fills a gap between the fan and the corresponding first cantilever portion in a radial direction of the fan.

9. The heat dissipation device according to any one of claims 5 to 8, characterized in that: The first air guide member also includes a first main body portion. Along the axial direction of the fan, the multiple first cantilever portions are connected to the same side of the first main body portion. The fan is arranged between the first main body portion and the tooth body portion. The first main body portion includes the first opening.

10. The heat dissipation device according to any one of claims 5 to 9, characterized in that: The first air guide member further includes a plurality of folded edge portions. Along the radial direction of the fan, one folded edge portion is respectively provided at opposite ends of each of the first cantilever portions, and at least a portion of the projection of each folded edge portion overlaps with the projection of the fan.

11. The heat dissipation device according to claim 4, characterized in that: The first air guide member includes a first tubular portion with a hollow structure, the heat sink is partially disposed inside the first tubular portion, and the fan is disposed inside the first tubular portion; Along the radial direction of the fan, the projection of the tooth body part partially overlaps with the projection of the first tubular portion; Along the axial direction of the fan, an opening of the first tubular portion close to the fan is the first opening, and an end of the first tubular portion close to the radiator and the radiator form the at least one second opening.

12. The heat dissipation device according to any one of claims 3 to 11, characterized in that: The heat sink also includes a spacer, which is arranged between the tooth body and the fan along the axial direction of the fan, and the projection of the spacer does not at least partially overlap with the projection of the air inlet. The spacer is used to make the distance between the air inlet and the tooth body in the axial direction of the fan greater than or equal to 2 mm.

13. The heat dissipation device according to claim 1 or 2, characterized in that: The fan is arranged outside the heat sink, the air inlet is used to receive the air guided out of the first opening, and the fan further includes an air outlet arranged outside the heat sink.

14. The heat dissipation device according to claim 13, characterized in that: The heat dissipation member includes a second air guide member and a heat sink; The heat sink comprises a main body and the tooth body, wherein the main body is used to contact with the device to be cooled; At least a portion of the tooth body is disposed inside the second air guide member, and along the axial direction of the fan, one end of the tooth body is close to the first opening, and the other end of the tooth body is connected to the main body; Along the axial direction of the fan, one end of the second air guide member includes the first opening or the second air guide member and the heat sink jointly define the first opening, and the other end of the second air guide member and the heat sink jointly define the at least one second opening.

15. The heat dissipation device according to claim 14, characterized in that: The second air guide member includes a plurality of second cantilever portions; Along the circumference of the fan, the plurality of second cantilever portions surround the heat sink; Along the radial direction of the fan, the projection of each second cantilever portion partially overlaps with the projection of the tooth body member; Along the axial direction of the fan, one end of the multiple second cantilever parts jointly enclose the first opening, or one end of the multiple second cantilever parts and the radiator jointly enclose the first opening, and the other end of each second cantilever part and the radiator jointly enclose at least one second opening.

16. The heat dissipation device according to claim 15, characterized in that: Along the radial direction of the fan, there is a gap between each of the second cantilever portions and the tooth body member.

17. The heat dissipation device according to claim 15 or 16, characterized in that: The second air guide member also includes a second main body portion. Along the axial direction of the fan, the multiple second cantilever portions are connected to the same side of the second main body portion. The second main body portion is arranged between the tooth body portion and the fan, and the second main body portion includes the first opening.

18. The heat dissipation device according to claim 17, characterized in that: Along the axial direction of the fan, the second main body portion abuts against the fan and the tooth body member respectively, and the thickness of the second main body portion is greater than or equal to 2 mm.

19. The heat dissipation device according to claim 17 or 18, characterized in that: A third surface of each second cantilever portion facing the tooth member in the radial direction of the fan intersects with a fourth surface of the second main body portion facing the tooth member in the axial direction of the fan, and an angle between the third surface and the fourth surface is a rounded angle.

20. The heat dissipation device according to any one of claims 1 to 19, characterized in that: The tooth body comprises a plurality of heat dissipation tooth portions, and each of the second openings corresponds to a plurality of heat dissipation tooth portions spaced apart along the circumference of the fan, wherein: Each of the heat dissipation teeth is disposed inside the heat dissipation element; or, A portion of each heat dissipation tooth portion is disposed inside the heat dissipation element, and another portion of each heat dissipation tooth portion is disposed inside the corresponding second opening.

21. A vehicle lamp assembly, characterized in that: It comprises a vehicle lamp body and a heat dissipation device as claimed in any one of claims 1 to 20; The vehicle lamp body comprises a housing and a light source arranged inside the housing; The heat sink of the heat dissipation device is arranged inside the housing and is used for dissipating heat from the light source.

22. A means of transport, characterized in that: Comprising the vehicle light assembly as claimed in claim 21.

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