Radiator and tube spotlight

Abstract

The utility model relates to the technical field of illumination, and provides a radiator and a barrel spotlight. The radiator is suitable for the tube spotlight, the tube spotlight comprises a lamp body, the lamp body is provided with a light emitting side and a backlight side which are opposite to each other, the radiator comprises radiating fins suitable for being arranged on the backlight side, and the radiating fins are suitable for being arranged in a laterally protruding mode relative to the lamp body. Therefore, the heat dissipation performance of the lamp can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to a radiator and a downlight. Background Art

[0002] Existing downlights generally include a lamp body with a light source installed and a heat sink arranged on the lamp body. Usually, the power range of downlights is 7W to 12W, and the increasingly diverse usage scenarios have put forward higher requirements on the brightness of downlights, and accordingly, downlights are also required to have greater power.

[0003] However, due to the short distance between the location of the lamp after installation and the roof, it is difficult to increase the area of ​​the radiator by increasing the height of the radiator, so the heat dissipation capacity of the lamp is insufficient, resulting in the power of the downlight being unable to meet the demand. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a radiator and a downlight to improve the heat dissipation performance of the lamp.

[0005] In order to solve the above-mentioned technical problems, the technical solution of the utility model provides a heat sink suitable for a downlight. The downlight includes a lamp body, the lamp body has a relative light-emitting side and a backlight side, and the heat sink includes: heat dissipation fins, which are suitable for being arranged on the backlight side, and the heat dissipation fins are suitable for being arranged to protrude laterally relative to the lamp body.

[0006] Optionally, the heat dissipation fins include: a first heat dissipation section and a second heat dissipation section; the first heat dissipation section is suitable for extending from the backlight side of the lamp body, the second heat dissipation section is connected end to end to the first heat dissipation section, and part or all of the second heat dissipation section is suitable for protruding laterally relative to the lamp body, and the extension direction of the second heat dissipation section is set at an angle with the extension direction of the first heat dissipation section, and the angle is less than 180°.

[0007] Optionally, the light-emitting side and the backlight side are respectively located on both sides of the lamp body along the axial direction of the lamp body; the first heat dissipation section is suitable for extending along the axial direction of the lamp body, the second heat dissipation section has a fin height in the axial direction, and the fin height of the second heat dissipation section at the first heat dissipation position is greater than or equal to the fin height of the second heat dissipation section at the second heat dissipation position, wherein the first heat dissipation position is closer to the first heat dissipation section in the radial direction of the lamp body than the second heat dissipation position.

[0008] Optionally, the second heat dissipation section is suitable for extending radially toward the outside of the lamp body, the edge of the second heat dissipation section toward the light emitting side is arc-shaped, and the fin height gradually decreases radially outward from the lamp body.

[0009] Optionally, the heat dissipation fin further includes: a third heat dissipation segment; the third heat dissipation segment is connected end to end with the second heat dissipation segment, and the axial height of the third heat dissipation segment is greater than or equal to the smallest fin height in the second heat dissipation segment.

[0010] Optionally, the radiator is provided with a plurality of heat dissipation fins, and the plurality of heat dissipation fins are arranged at intervals along a thickness direction of the heat dissipation fins, and any two adjacent heat dissipation fins are parallel to each other.

[0011] Optionally, multiple heat sinks constitute at least a first heat sink group, a second heat sink group and a third heat sink group, the first heat sink group, the second heat sink group and the third heat sink group each include at least one heat sink, and along the thickness direction of the heat sink, the second heat sink group and the third heat sink group are respectively located on both sides of the first heat sink group; the heat sinks in the first heat sink group are first heat sinks; the heat sinks in the second heat sink group are second heat sinks; the heat sinks in the third heat sink group are third heat sinks; the fin height of the first heat sink in any heat sink plane is greater than the fin height of the second heat sink in any heat sink plane, and the fin height of the first heat sink in any heat sink plane is greater than the fin height of the third heat sink in any heat sink, wherein the heat sink plane is parallel to the thickness direction and axial direction of the heat sink, and intersects with the second heat sink section.

[0012] Optionally, along the direction from the first heat dissipation fin group to the second heat dissipation fin group, the fin height of each second heat dissipation fin in the same heat dissipation plane gradually decreases; along the direction from the first heat dissipation fin group to the third heat dissipation fin group, the fin height of each third heat dissipation fin in the same heat dissipation plane gradually decreases.

[0013] Optionally, a heat dissipation distance is provided between the second heat dissipation segment of any heat dissipation fin and the second heat dissipation segment of an adjacent heat dissipation fin, and a ratio of a fin height of any heat dissipation fin to the heat dissipation distance is in a range of 3.2 to 5.5.

[0014] The technical solution of the utility model further provides a downlight, comprising: a lamp body; and a heat sink as in the above-mentioned embodiment, which is arranged on the end or outer side wall of the lamp body.

[0015] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0016] In the radiator provided by the technical solution of the utility model, since the heat dissipation fins are arranged to protrude laterally relative to the lamp body, on the one hand, the installation environment is fully utilized and the heat exchange area of ​​the radiator can be increased through the side area of ​​the lamp body. On the other hand, the hot air after the lamp is heated by the light source flows upward to exchange heat with the heat dissipation fins. In other words, the heat dissipation flow path of the hot air around the lamp is short and direct, and the hot air can contact the heat dissipation fins more quickly, which accelerates the heat exchange process. Therefore, the heat dissipation efficiency of the radiator can be improved in a highly restricted installation environment.

[0017] The downlight provided by the technical solution of the utility model has good heat dissipation performance due to the use of the above-mentioned heat dissipation fins, and can be provided with a high-power light source that meets customer needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a three-dimensional diagram of the lamp of the utility model;

[0020] Figure 2 It is the front view of the lamp of the utility model;

[0021] Figure 3 It is a side view of the lamp of the utility model;

[0022] Figure 4 It is a partial schematic diagram of the heat sink fin;

[0023] Figure 5 It is a bottom view of the lamp of the utility model;

[0024] Figure 6 It is a schematic diagram of simulating air flow through the lamp of the utility model.

[0025] Reference numerals:

[0026] 100, radiator; 110, cooling fins; 111, first cooling section; 112, second cooling section; 113, third cooling section; 101, first cooling fin group; 1010, first cooling fin; 102, second cooling fin group; 1020, second cooling fin; 103, third cooling fin group; 1030, third cooling fin; 200, lamp body; 210, light emitting side; 220, backlight side; O, axial direction of lamp body; T, thickness direction of cooling fin; P, cooling plane; h, fin height. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present embodiment.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this embodiment, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this embodiment, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0031] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Figures 1 to 6 The heat sink 100 provided in the embodiment of the utility model is shown. The heat sink 100 is applicable to a downlight. The downlight comprises a lamp body 200. The lamp body 200 is provided with a light source. The lamp body 200 has a light emitting side 210 and a backlight side 220 opposite to each other.

[0033] The heat sink 100 includes a heat dissipation fin 110 , which is suitable for being arranged on the backlight side 220 , and the heat dissipation fin 110 is suitable for being arranged to protrude laterally relative to the lamp body 200 .

[0034] On one hand, since the heat dissipation fins 110 are arranged to protrude laterally relative to the lamp body 200 , the installation environment is fully utilized, and the heat exchange area of ​​the radiator 100 is increased through the side area of ​​the lamp body 200 .

[0035] On the other hand, since the heat dissipation fins 110 are arranged to protrude laterally relative to the lamp body 200, the hot air around the lamp body 200 that is heated by the light source can flow upward to exchange heat with the heat dissipation fins 110. The heat dissipation flow path of the hot air around the lamp body 200 is short and direct, and the hot air can contact the heat dissipation fins 110 more quickly, thereby accelerating the heat exchange process.

[0036] Specifically, after the light source of the lamp is powered on, the air around the lamp (lamp body 200) will be heated by the light source, and the heated air will move upward according to the principle of thermal convection. In the prior art, the flow path of the hot air needs to be first upward, then horizontally inward, and then upward (such as Figure 2 ), to exchange heat with the radiator 100 to achieve the purpose of heat dissipation.

[0037] In this embodiment, since the heat dissipation fins 110 are arranged to protrude laterally relative to the lamp body 200, the hot air around the lamp (lamp body 200) can flow upward to contact the heat dissipation fins 110, and achieve the purpose of heat dissipation through heat exchange with the heat dissipation fins 110. That is to say, in this embodiment, the heat dissipation flow path of the hot air is basically a straight line (such as Figure 2As shown by the dotted arrow on the right side of ), the heat dissipation flow path of the hot air is shorter and more direct, and the hot air around the lamp (lamp body 200) can contact the heat dissipation fins 110 more quickly, thereby accelerating the heat exchange process compared to the prior art.

[0038] In summary, the effective horizontal ceiling space is fully utilized to improve the heat dissipation efficiency of the radiator 100 in an installation environment with limited height.

[0039] In some embodiments, the light emitting side 210 and the backlight side 220 are respectively located on both sides of the lamp body 200 along the axial direction O of the lamp body 200 , the light emitting side 210 may be the lower side, and the backlight side 220 may be the upper side.

[0040] The heat dissipation fin 110 includes a first heat dissipation section 111 and a second heat dissipation section 112 .

[0041] The first heat dissipation section 111 is suitable for extending from the backlight side 220 of the lamp body 200, the second heat dissipation section 112 is connected end to end with the first heat dissipation section 111, and part or all of the second heat dissipation section 112 is suitable for being arranged to protrude laterally relative to the lamp body 200, and the extension direction of the second heat dissipation section 112 is arranged at an angle with the extension direction of the first heat dissipation section 111, and the angle is less than . Therefore, on the basis of not affecting the light emission effect, not only the side installation space of the lamp body 200 is utilized, but also the installation space of the lamp body 200 in the height direction is fully utilized, so that the radiator 100 can increase more heat dissipation area, and the heat dissipation performance can be further improved.

[0042] Furthermore, the heat dissipation fins 110 may be disposed at the upper end of the lamp body 200 .

[0043] In some other embodiments, the heat dissipation fins 110 are protrudingly disposed on the side wall of the lamp body 200 .

[0044] Furthermore, the heat dissipation fins 110 are extended and arranged along an axial direction O perpendicular to the lamp body 200 , that is, the heat dissipation fins 110 can be arranged along a radial direction of the lamp body 200 .

[0045] In some embodiments, the first heat dissipation segment 111 is suitable for extending along the axial direction O of the lamp body 200, the second heat dissipation segment 112 has a fin height h in the axial direction O, and the fin height h of the second heat dissipation segment 112 at the first heat dissipation position is greater than or equal to the fin height h of the second heat dissipation segment 112 at the second heat dissipation position, wherein the first heat dissipation position is closer to the first heat dissipation segment 111 in the radial direction of the lamp body 200 than the second heat dissipation position.

[0046] The largest source of heat generated in a fixture is usually the light source.

[0047] By extending the first heat dissipation section 111 closest to the light source along the axial direction O of the lamp body 200, a basic heat dissipation channel along the axial direction O of the lamp is constructed, which is conducive to the rapid diffusion of heat generated by the heat source along the axial direction O and effectively reduces the local temperature near the heat source.

[0048] Moreover, the fin height h of the second heat dissipation section 112 at the first heat dissipation position is greater than or equal to the fin height h at the second heat dissipation position, which means that the second heat dissipation section 112 presents a larger fin height h at a position close to the first heat dissipation section 111, and as the distance from the first heat dissipation section 111 increases, the fin height h gradually decreases or remains unchanged. This height variation design is intended to scientifically allocate the heat dissipation capacity of the heat dissipation fins 110 according to the hot air flow characteristics and heat dissipation requirements, form a dense and efficient heat dissipation area near the heat source, quickly absorb and dissipate a large amount of heat, ensure effective cooling of the area close to the heat source, and appropriately reduce the fin height h in the area far from the heat source to save materials and reduce weight while maintaining the necessary heat dissipation capacity, so that the radiator 100 can show targeted heat dissipation effects in different areas, and achieve a balance between heat dissipation performance and structural economy.

[0049] In some embodiments, the second heat dissipation section 112 is suitable for extending radially toward the outside of the lamp body 200, the edge of the second heat dissipation section 112 toward the light emitting side 210 is arc-shaped, and the fin height h gradually decreases radially outward from the lamp body 200.

[0050] Specifically, since the second heat dissipation section 112 is suitable for extending radially toward the outside of the lamp main body 200, that is, expanding radially outward along the lamp main body 200, while the first heat dissipation section 111 effectively utilizes the installation environment in the height direction, the second heat dissipation section 112 is avoided from being restricted by the installation environment in the height direction.

[0051] On this basis, since the edge of the second heat dissipation section 112 facing the light-emitting side 210 is designed to be arc-shaped, and the fin height h gradually decreases radially outward from the lamp body 200, the change of the fin height h of the second heat dissipation section 112 at each heat dissipation position is achieved in a smooth transition manner.

[0052] On the one hand, this smoothly transitioned shape helps to reduce air flow resistance, guide hot air to flow more smoothly through the heat sink fins 110, avoid the generation of local eddies, thereby improving the contact efficiency between the hot air and the surface of the heat sink fins 110 and enhancing the convection heat dissipation effect.

[0053] On the other hand, the fin height h of the second heat dissipation section 112 gradually decreases in the radial outward direction of the lamp body 200. This design further enhances the targeted heat dissipation effect of the radiator 100 in different areas, and is conducive to further reducing material usage and reducing the weight of the radiator 100, thereby achieving a further balance between heat dissipation performance and structural efficiency.

[0054] In some embodiments, Figure 4 As shown, the heat dissipation fin 110 further includes: a third heat dissipation section 113. The third heat dissipation section 113 is connected end to end with the second heat dissipation section 112, and the height of the third heat dissipation section 113 along the axial direction O is greater than or equal to the smallest fin height h in the second heat dissipation section 112. Thus, not only the heat dissipation area is further increased, but also the end of the heat dissipation fin 110 can avoid forming a relatively sharp structure, thereby preventing accidental injury to the hands of the installer.

[0055] In some embodiments, the heat sink 100 is provided with a plurality of heat dissipation fins 110 , and the plurality of heat dissipation fins 110 are arranged at intervals along a thickness direction T of the heat dissipation fins 110 , and any two adjacent heat dissipation fins 110 are parallel to each other.

[0056] Specifically, the heat sink 100 is provided with a plurality of heat dissipation fins 110, which are evenly spaced and arranged along the thickness direction T to form a dense heat dissipation network. The design of multiple heat dissipation fins 110 significantly increases the total heat dissipation area of ​​the heat sink 100, provides more heat dissipation contact surfaces for the heat generated by the heat source, facilitates faster and more complete transfer of heat to the environment, and improves the heat dissipation efficiency of the heat sink 100.

[0057] On this basis, multiple heat dissipation fins 110 are arranged at intervals along the thickness direction T of the heat dissipation fins 110, and any two adjacent heat dissipation fins 110 are parallel to each other. This regular arrangement is conducive to ensuring that the distance between each heat dissipation fin 110 is moderate, which can not only effectively avoid thermal short circuits between the heat dissipation fins 110, but also reduce airflow resistance and guide hot air to form a stable flow channel inside the radiator 100. Therefore, each heat dissipation fin 110 can independently and effectively perform heat exchange, and a channel conducive to air flow can be formed between the heat dissipation fins 110, so that the hot air is fully in contact with the surface of the heat dissipation fin 110 and is evenly distributed inside the entire radiator 100 for efficient heat exchange. Therefore, the heat dissipation load of each part of the radiator 100 is evenly distributed, the overall heat dissipation efficiency and stability are improved, and the convection heat dissipation effect is further enhanced.

[0058] In some embodiments, a plurality of heat dissipating fins 110 at least constitute a first heat dissipating fin group 101, a second heat dissipating fin group 102, and a third heat dissipating fin group 103. The first heat dissipating fin group 101, the second heat dissipating fin group 102, and the third heat dissipating fin group 103 each include at least one heat dissipating fin 110, and along the thickness direction T of the heat dissipating fin 110, the second heat dissipating fin group 102 and the third heat dissipating fin group 103 are respectively located on both sides of the first heat dissipating fin group 101. For example, one of the second heat dissipating fin group 102 and the third heat dissipating fin group 103 is located on the left side of the first heat dissipating fin group 101, and the other is located on the right side of the first heat dissipating fin group 101.

[0059] Specifically, the plurality of heat dissipating fins 110 are divided into at least three fin groups, including: a first heat dissipating fin group 101, a second heat dissipating fin group 102, and a third heat dissipating fin group 103. Each fin group includes at least one heat dissipating fin 110, and along the thickness direction T of the heat dissipating fin 110, the second heat dissipating fin group 102 and the third heat dissipating fin group 103 are respectively located on both sides of the first heat dissipating fin group 101. Thus, a clearly hierarchical heat dissipation structure is formed. This grouping design helps to optimize each group of heat dissipating fins 110 in a targeted manner according to different heat dissipation requirements, thereby improving the flexibility and adaptability of the heat dissipation system.

[0060] For ease of understanding and explanation, the heat dissipation fins 110 in the first heat dissipation fin group 101 are defined as first heat dissipation fins 1010. The heat dissipation fins 110 in the second heat dissipation fin group 102 are defined as second heat dissipation fins 1020. The heat dissipation fins 110 in the third heat dissipation fin group 103 are defined as third heat dissipation fins 1030. In addition, the fin height h of the first heat dissipation fin 1010 on any heat dissipation plane P can be recorded as the first height. The fin height h of the second heat dissipation fin 1020 on any heat dissipation plane P can be recorded as the second height. The fin height h of the third heat dissipation fin 1030 on any heat dissipation plane P can be recorded as the third height. The heat dissipation plane P is a plane parallel to the thickness direction T and the axial direction O of the heat dissipation fin 110 and intersecting with the second heat dissipation section 112.

[0061] The first height is greater than the second height, and the first height is greater than the third height. This highly differentiated configuration follows the law of heat flow from the heat source to the cold end, so that the first heat dissipation fin 1010 close to the heat source has a higher fin height h to enhance initial heat dissipation; and as the distance from the heat source increases, the fin height h of the second heat dissipation fin 1020 and the third heat dissipation fin 1030 gradually decreases, which not only saves materials and reduces weight, but also ensures that the remote area still has appropriate heat dissipation capacity, achieving a balance between heat dissipation performance and structural efficiency.

[0062] In summary, the layered and gradient fin group design helps to optimize the heat flow distribution inside the radiator 100, so that the heat can be more evenly distributed to each fin group during the heat transfer in the axial direction O, avoiding local overheating, achieving a balanced distribution of the heat dissipation load of each part of the radiator 100, and further improving the stability and reliability of the heat dissipation system.

[0063] In this embodiment, the first heat dissipation fin group 101 is located in the middle of the upper end of the lamp body 200 .

[0064] Specifically, since the light source is generally installed in the middle of the accommodating cavity of the lamp body 200, when powered on, the heat of the light source will be transferred from the middle of the lamp body 200 to the surroundings, that is, the heat in the middle of the lamp body 200 is higher and the heat in other positions is relatively lower.

[0065] For the first heat dissipation fin group 101, since the heat in the middle of the lamp body 200 is higher and the air flows faster, in order to ensure the heat dissipation performance in the middle of the lamp body 200, the heat dissipation fins 110 in the middle of the lamp body 200 can be set higher and larger while the distance between each two adjacent heat dissipation fins 110 remains unchanged. That is, the first heat dissipation fin group 101 is located in the middle position of the upper end of the lamp body 200, thereby increasing the heat exchange area and improving the heat dissipation effect in the middle of the lamp body 200. For the second heat dissipating fin group 102 and the third heat dissipating fin group 103, since the second heat dissipating fin group 102 and the third heat dissipating fin group 103 are not in the middle of the lamp body 200, the temperature of the lamp body 200 at this position is lower and the air flows slower at this position. In order to make the air flow faster at this position to improve the heat dissipation efficiency at this position, in combination with the boundary layer theory, the heat dissipating fins 110 in the second heat dissipating fin group 102 and the third heat dissipating fin group 103 are designed to be shorter, so that the air can flow faster, thereby improving the heat dissipation efficiency; that is, through the above-mentioned structural setting, the heat dissipation efficiency in the middle of the lamp body 200 and on both sides thereof can be improved.

[0066] In some embodiments, along the direction from the first heat dissipation fin group 101 to the second heat dissipation fin group 102, the fin height h of each second heat dissipation fin 1020 on the same heat dissipation plane P gradually decreases. Along the direction from the first heat dissipation fin group 101 to the third heat dissipation fin group 103, the fin height h of each third heat dissipation fin 1030 on the same heat dissipation plane P gradually decreases. As a result, the heat dissipation efficiency is further improved, and a further balance between heat dissipation performance and structural efficiency is achieved. The explanation of the relevant working principles and beneficial effects can refer to the aforementioned description of the first heat dissipation fin group 101, the second heat dissipation fin group 102 and the third heat dissipation fin group 103, which will not be repeated here.

[0067] In some embodiments, there is a heat dissipation spacing between the second heat dissipation segment 112 of any heat dissipation fin 110 and the second heat dissipation segment 112 of the adjacent heat dissipation fin 110, and the ratio of the fin height h of any heat dissipation fin 110 to the heat dissipation spacing ranges from 3.2 to 5.5, which may also be referred to as the height-to-distance ratio. By optimizing the ratio of the fin height h to the spacing to achieve this specific ratio, the ventilation performance between the heat dissipation fins 110 and the heat exchange efficiency of the heat dissipation fins 110 themselves are taken into account, which ensures sufficient air circulation between adjacent heat dissipation fins 110 and avoids thermal short circuits between the heat dissipation fins 110, and ensures that each heat dissipation fin 110 can independently and effectively perform heat exchange, thereby optimizing the heat flow distribution inside the radiator 100 and maximizing the heat dissipation efficiency.

[0068] Please continue to refer to Figures 1 to 6 The embodiment of the utility model further provides a downlight, comprising: a lamp body 200 and a heat sink 100 .

[0069] The lamp body 200 may be a cylindrical structure with an opening at the lower end and a closed upper end. A receiving cavity is provided inside the lamp body 200, and the receiving cavity may be a columnar structure arranged vertically, and is used to install the light source (such as a light emitting diode) of the downlight into the receiving cavity through the opening.

[0070] The lamp body 200 can be die-casted using existing high thermal conductivity aluminum alloy materials.

[0071] In this embodiment, the heat sink 100 is disposed at the end of the lamp body 200 .

[0072] In some other embodiments, the heat sink 100 is disposed on the outer side wall of the lamp body 200 .

[0073] The heat sink 100 is as described in the above embodiment, and its specific structure, working principle and beneficial effects are not described in detail again.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A heat sink, suitable for a downlight, the downlight comprising a lamp body (200), the lamp body (200) having a light emitting side (210) and a backlight side (220) opposite to each other, characterized in that: The radiator comprises: The heat dissipation fin (110) is suitable for being arranged on the backlight side (220), and the heat dissipation fin (110) is suitable for being arranged to protrude laterally relative to the lamp body (200).

2. The heat sink according to claim 1, characterized in that: The heat dissipation fin (110) comprises: a first heat dissipation section (111) and a second heat dissipation section (112); The first heat dissipation section (111) is suitable for extending from the backlight side (220) of the lamp body (200), the second heat dissipation section (112) is connected end to end with the first heat dissipation section (111), and part or all of the second heat dissipation section (112) is suitable for being arranged to protrude laterally relative to the lamp body (200), and the extension direction of the second heat dissipation section (112) is arranged at an angle with the extension direction of the first heat dissipation section (111), and the angle is less than 180°.

3. The heat sink according to claim 2, characterized in that: The light-emitting side (210) and the backlight side (220) are respectively located on two sides of the lamp body (200) along the axial direction (O) of the lamp body (200); The first heat dissipation section (111) is suitable for extending along the axial direction (O) of the lamp body (200), the second heat dissipation section (112) has a fin height (h) in the axial direction (O), and the fin height (h) of the second heat dissipation section (112) at the first heat dissipation position is greater than or equal to the fin height (h) of the second heat dissipation section (112) at the second heat dissipation position, wherein the first heat dissipation position is closer to the first heat dissipation section (111) in the radial direction of the lamp body (200) than the second heat dissipation position.

4. The heat sink according to claim 3, characterized in that: The second heat dissipation section (112) is suitable for extending radially toward the outside of the lamp body (200) along the radial direction of the lamp body (200), the edge of the second heat dissipation section (112) toward the light emitting side (210) is arc-shaped, and the fin height (h) gradually decreases in a radial outward direction of the lamp body (200).

5. The heat sink according to claim 4, characterized in that: The heat dissipation fin (110) further comprises: a third heat dissipation section (113); The third heat dissipation section (113) is connected end to end with the second heat dissipation section (112), and the height of the third heat dissipation section (113) along the axial direction (O) is greater than or equal to the smallest fin height (h) in the second heat dissipation section (112).

6. The radiator according to any one of claims 3 to 5, characterized in that: The radiator is provided with a plurality of the radiating fins (110), the plurality of the radiating fins (110) are arranged at intervals along a thickness direction (T) of the radiating fins (110), and any two adjacent radiating fins (110) are parallel to each other.

7. The heat sink according to claim 6, characterized in that The plurality of heat dissipation fins (110) at least constitute a first heat dissipation fin group (101), a second heat dissipation fin group (102) and a third heat dissipation fin group (103); the first heat dissipation fin group (101), the second heat dissipation fin group (102) and the third heat dissipation fin group (103) each comprise at least one heat dissipation fin (110); and, along a thickness direction (T) of the heat dissipation fin (110), the second heat dissipation fin group (102) and the third heat dissipation fin group (103) are respectively located on both sides of the first heat dissipation fin group (101); The heat dissipation fins (110) in the first heat dissipation fin group (101) are first heat dissipation fins (1010); the heat dissipation fins (110) in the second heat dissipation fin group (102) are second heat dissipation fins (1020); and the heat dissipation fins (110) in the third heat dissipation fin group (103) are third heat dissipation fins (1030); The fin height (h) of the first heat dissipation fin (1010) in any heat dissipation plane (P) is greater than the fin height (h) of the second heat dissipation fin (1020) in any heat dissipation plane (P), and the fin height (h) of the first heat dissipation fin (1010) in any heat dissipation plane (P) is greater than the fin height (h) of the third heat dissipation fin (1030) in any heat dissipation plane (P), wherein the heat dissipation plane (P) is parallel to the thickness direction (T) and the axial direction (O) of the heat dissipation fin (110), and intersects with the second heat dissipation section (112).

8. The heat sink according to claim 7, characterized in that: Along the direction from the first heat dissipation fin group (101) to the second heat dissipation fin group (102), the fin height (h) of each of the second heat dissipation fins (1020) on the same heat dissipation plane (P) gradually decreases; Along the direction from the first heat dissipation fin group (101) to the third heat dissipation fin group (103), the fin height (h) of each of the third heat dissipation fins (1030) on the same heat dissipation plane (P) gradually decreases.

9. The heat sink according to claim 7, characterized in that: A heat dissipation distance is provided between the second heat dissipation section (112) of any heat dissipation fin (110) and the second heat dissipation section (112) of an adjacent heat dissipation fin (110), and a ratio of a fin height (h) of any heat dissipation fin (110) to the heat dissipation distance is in the range of 3.2 to 5.

5.

10. A downlight, characterized in that: include: Lamp body (200); The heat sink according to any one of claims 1 to 8 is arranged on the end or the outer side wall of the lamp body (200).

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