Lighting device

Abstract

The utility model provides a lighting device, which comprises a radiator, a light source module, a light source module, a light source module, a light source module and a light source module, the heat dissipation device comprises a base and a plurality of heat dissipation units, each heat dissipation unit comprises at least two fins and a substrate, the fins are arranged on the second side of the base, the heat dissipation units are arranged on the base, the first side of the base forms a mounting plane, and the substrate forms at least one part of the mounting plane. And the light source comprises a lamp panel and lamp beads arranged on the lamp panel, and the lamp panel is attached to the mounting plane of the radiator.

Description

[0001] This invention application is a divisional application submitted to the China Patent Office on July 20, 2023, with application number 202321913868.1 and invention name "A radiator and a lighting device including the radiator". Technical Field

[0002] The utility model relates to a lighting device. Background Art

[0003] LED (semiconductor light emitting diode) generates heat when working. If the LED is not cooled, it will work at high temperature for a long time, which will affect its light quality (such as reduced light efficiency and reduced light uniformity). The heat generated by the LED will also affect the life of the LED lamp's power supply, optical units (such as lenses, diffusers), etc.

[0004] In the prior art, a heat sink is usually provided to dissipate heat from the LED. The heat sink in the prior art usually includes a base and fins provided on the base. When in use, the LED is mounted on the light board, and the light board is mounted on the base, thereby forming a heat conduction path.

[0005] The heat sink in the prior art is usually formed in one piece. Specifically, the heat sink has the following molding methods: 1. Cold forging. This molding process is difficult and involves multiple processes, resulting in low production efficiency and low material utilization rate of cold forging. 2. Die casting. The heat sink formed by die casting has poor heat dissipation effect due to problems on the surface of the heat sink. In addition, the die casting has a large draft angle, resulting in thicker fins, which increases material costs. Similarly, die casting has more processing steps and low production efficiency. 3. Extrusion molding. This process is suitable for small heat sinks. When the power of the LED lamp is high and a larger heat sink is required, the extrusion process is difficult to implement and the extruded product is easily deformed.

[0006] In summary, in view of the deficiencies and defects of the heat sink in the prior art, how to design a heat sink to solve the problem of heat dissipation and light emission is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] Many embodiments of the present invention are briefly described herein. However, the term "the present invention" is only used to describe certain embodiments disclosed in this specification (whether or not in the claims), rather than a complete description of all possible embodiments. Certain embodiments described above as various features or aspects of the present invention can be combined in different ways to form a heat sink or a portion thereof.

[0008] The embodiments of the present utility model provide a new lighting device and features in various aspects to solve the above problems.

[0009] The present invention provides a lighting device, which includes:

[0010] A heat sink, the heat sink comprising a base having a first side and an opposite second side; and a plurality of heat dissipation units, the heat dissipation units comprising at least two fins and a base, the fins being arranged on the second side of the base, the heat dissipation units being arranged on the base, the first side of the base forming a mounting plane, and the base constituting at least a portion of the mounting plane; and

[0011] The light source comprises a lamp board and lamp beads arranged on the lamp board, and the lamp board is attached to the mounting plane of the radiator.

[0012] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects: the radiator forms a mounting plane on the first side of the base for mounting the lamp board, and the base constitutes at least a part of the mounting plane; when the lamp board is mounted to the radiator, the lamp board can be directly attached to the heat dissipation unit, and the heat generated by the lamp beads on the lamp board during operation can be quickly conducted to the heat dissipation unit and dissipated through the fins of the heat dissipation unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The three-dimensional structure of the heat sink of the lighting device of the utility model embodiment is shown in FIG. Figure 1 ;

[0014] Figure 2 The three-dimensional structure of the heat sink of the lighting device of the utility model embodiment is shown in FIG. Figure 2 ;

[0015] Figure 3 is a schematic diagram of the side structure of the heat sink of the lighting device of the embodiment of the utility model;

[0016] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0017] Figure 5 It is a side structural schematic diagram of a base of a heat sink of a lighting device in an embodiment of the utility model;

[0018] Figure 6 It is a schematic diagram of the three-dimensional structure of the base of the heat sink of the lighting device in the embodiment of the utility model;

[0019] Figure 7 The three-dimensional structure diagram of the heat dissipation unit of the heat sink of the lighting device in the embodiment of the utility model Figure 1 ;

[0020] Figure 8 The three-dimensional structure diagram of the heat dissipation unit of the heat sink of the lighting device in the embodiment of the utility model Figure 2 ;

[0021] Fig. 9 It is a schematic diagram of the three-dimensional structure of the heat sink of the lighting device of some embodiments of the utility model;

[0022] Fig.10 is a schematic diagram of a three-dimensional structure of a base in some embodiments;

[0023] Fig.11 Schematic diagram of the three-dimensional structure of the heat dissipation unit in some embodiments Figure 1 ;

[0024] Fig.12 Schematic diagram of the three-dimensional structure of the heat dissipation unit in some embodiments Figure 2 ;

[0025] Fig.13 It is a three-dimensional structural schematic diagram of the lighting device in the embodiment of the utility model, showing the radiator as the direction;

[0026] Fig.14 It is a schematic diagram of the three-dimensional structure of the lighting device in some embodiments of the utility model, showing that the heat sink is circular. DETAILED DESCRIPTION

[0027] Embodiments of the present invention will now be described more completely below with reference to the accompanying drawings, in which embodiments of the present invention are shown. However, the present invention can be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. The same reference numerals indicate the same elements in the drawings.

[0028] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element without departing from the scope of the present invention. When used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] It will be understood that when an element, such as a layer, region, or substrate, is referred to as being "on" or extending "onto" another element, the element may be directly on or directly extending onto the other element, or intervening elements may also be present. Conversely, when an element is referred to as being "directly on" or "extending directly onto" another element, there are no intervening elements. It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intervening elements. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements.

[0030] Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe the relationship of one element, layer or region to another element, layer or region as illustrated in the figure. It will be understood that these terms are intended to cover different device orientations other than the orientation depicted in the figure. In the present utility model, the "vertical", "horizontal" and "parallel" are defined as: including ±10% of the standard definition. For example, vertical generally refers to an angle of 90 degrees relative to a reference line, but in the present utility model, vertical refers to a situation within 80 to 100 degrees.

[0031] The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. When used herein, the singular forms "a", "an" and "the" are intended to also include plural forms unless the context clearly indicates otherwise. It will also be understood that when used herein, the terms "include", "comprise", "include" and / or "comprising" specify the presence of stated features, integers, steps, operations, elements and / or parts, but do not exclude the presence or increase of one or more other features, integers, steps, operations, elements, parts and / or combinations thereof.

[0032] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by ordinary technicians in the field to which the utility model belongs. It will also be understood that the terms used in this article should be interpreted as having the meaning consistent with their meanings in the context of this specification and the relevant field, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0033] Unless otherwise expressly stated, comparative quantitative terms such as "less than" and "greater than" are intended to encompass the concept of equality. As an example, "less than" may not only mean "less than" in the strictest mathematical sense, but may also mean "less than or equal to".

[0034] like Figures 1 to 9 As shown, a heat sink is provided in an embodiment of the utility model. The heat sink includes a base 1 and a heat dissipation unit 2 disposed on the base 1. The heat dissipation unit 2 and the base 1 use different components and are combined to form a heat sink. Compared with the one-piece molding of the heat sink, the heat sink in this embodiment is formed by splicing the heat dissipation unit 2 and the base 1, and its manufacturing process is simple and the cost is lower.

[0035] The heat dissipation unit 2 includes fins 21 and a base 22, and the fins 21 and the base 22 are formed of an integrated structure. The base 1 has a first side and an opposite second side, the fins 21 are located on the second side of the base 1, and the base 22 is located on the first side of the base 1. The heat sink forms a mounting plane on the first side of the base 1 for mounting the lamp board, and the base 22 constitutes at least a part of the mounting plane. When the lamp board is mounted to the heat sink, the lamp board can be directly attached to the heat dissipation unit 2, and the heat generated by the lamp beads on the lamp board during operation can be quickly conducted to the heat dissipation unit 2 and dissipated through the fins 21 of the heat dissipation unit 2.

[0036] A fin 21 is formed on each side of the width direction of the base 22. A first surface 11 and a second surface 12 are provided on the base 1, and the first surface 11 and the second surface 12 are both located on the first side of the base 1. Holes 13 are provided on both sides of the first surface 11 of the base 1. When the heat dissipation unit 2 is installed on the base 1, the base 22 is attached to the first surface 11, and the fins 21 on both sides of the base 22 pass through the holes 13, so that the fins 21 (at least 95% of the height direction of the fins 21) are located on the second side of the base 1. The heat dissipation unit 2 is formed by a sheet metal structure, which has a uniform wall thickness (the wall thickness of the base 22 is roughly the same as the wall thickness of the fin 21). The sheet metal here refers to sheet bending, stamping and other processes. Similarly, the base 1 is formed by a sheet metal structure, which has a uniform wall thickness. The above-mentioned heat dissipation unit 2 and base 1 are both formed by sheet metal, and there is no need to set a thicker wall thickness as in the cold forging or die casting in the prior art, thereby saving materials and making the processing technology simpler.

[0037] The surface 221 of the base 22 (the surface constituting the mounting plane) is flush with the second surface 12 of the base 1 or exceeds the second surface 12 of the base 1 in the height direction of the base 1. In other words, when the light board is mounted to the heat sink, the surface of the light board is in contact with the surface 221 of the base 22, and the surface of the light board can be in contact with the second surface 12 of the base 1 or maintain a distance from the second surface 12 of the base 1. In one embodiment, the surface of the light board is in contact with the base 22 and the second surface 12 of the base 1, respectively.

[0038] A heat conducting sheet 23 is disposed on the base 22. The heat conducting sheet 23 has a heat conducting portion 231 extending along the width direction of the surface 221 of the base 22. The surface 2311 of the heat conducting portion 231 is located on the same plane as the surface 221 of the base 22. Therefore, when the lamp board is installed, it can be in thermal contact with the surface 2311 of the base 22 and the surface 221 of the heat conducting portion 231 at the same time. By disposing the heat conducting portion 231, the contact area between the heat dissipation unit 2 and the lamp board can be increased to improve the heat conduction efficiency from the lamp board to the heat dissipation unit 2. The ratio of the area of ​​the surface 2311 of the heat conducting portion 231 to the area of ​​the surface of the base 22 is greater than 0.06, 0.07 or 0.08, and less than 0.2.

[0039] The heat conducting sheet 23 may be provided with a heat sink 232, which passes through a hole on the base 1 and is disposed on the second side of the base 1. The hole here may be connected to the aforementioned hole 13, so the fin 21 and the heat sink 232 both pass through the hole 13.

[0040] The heat sink 232 is attached to the surface of the fin 21 of the adjacent heat dissipation unit 2 to play a role in positioning and stabilizing the structure. The heat dissipation unit 2 and the base 1 in this embodiment can be made of aluminum, such as aluminum 1050, so that it has better thermal conductivity and thermal radiation performance. In order to further improve the thermal radiation performance of the heat dissipation unit 2 and the base 1, aluminum oxidation treatment or electrophoretic resin can be applied on the surface of both to make their thermal radiation coefficient reach above 0.5.

[0041] like Figures 1 to 6 As shown, in this embodiment, the heat sink (base 1) is roughly square, and the fins 21 of the heat sink 2 are arranged along the length direction or width direction of the heat sink. In this embodiment, the spacing between adjacent fins 21 is 7 to 10 mm, which ensures that the fins 21 have sufficient space for external radiation heat dissipation on the one hand, and that there is sufficient space between the fins 21 for convection heat dissipation on the other hand.

[0042] In this embodiment, the two ends of the base 1 have an end wall 14 respectively, and the fin 21 is disposed in the space between the end walls 14 at the two ends of the base 1. The end wall 14 and the base 1 are formed as an integrated structure with better structural strength, so the end wall 14 can protect the fin 21 and prevent the fin 21 from being deformed due to collision.

[0043] like Figures 9 to 12 As shown, in some embodiments, the heat sink (base 1) is roughly circular, and the heat dissipation units 2 are evenly arranged along the circumference of the base 1. In this embodiment, the angle between adjacent fins 21 is between 7° and 15°. And the shortest distance between adjacent fins 21 is greater than 4mm. In this embodiment, other basic structures are roughly the same as the above-mentioned embodiments.

[0044] like Figures 1 to 14 As shown, an embodiment of the utility model provides a lighting device, which includes a light source and a heat sink (a round heat sink or a square heat sink) in the above embodiment. The light source includes a lamp board 3 and lamp beads 4 arranged on the lamp board. The lamp board 3 is attached to the mounting plane of the heat sink, and the base 22 is pressed between the lamp board 3 and the first surface of the base 1 to fix the base 22.

[0045] In this embodiment, the lamp board 3 is in direct thermal contact with the surface 221 of the base 22, the second surface 12 of the base 1, and the surface 22311 of the heat conduction portion 231 to form a heat conduction path. The lamp board 3 can directly form a conduction path with the heat dissipation unit 2, and the conduction path is shorter, which is more conducive to rapid heat dissipation.

[0046] In this embodiment, the heat dissipation unit 2 is positioned on the base 1 by a positioning unit. The positioning unit may be a positioning groove, which is formed by two adjacent groups of second surfaces 12 and the first surface 11 between the two groups of second surfaces 12. The positioning unit may also be a hole 13, through which the fin 21 is positioned, thereby achieving the positioning of the heat dissipation unit 2.

[0047] In this embodiment, the lamp board 3 can be fixed to the base 1 by a fastener. In some embodiments, after the fastener passes through the lamp board 3, it forms a match with the second surface 12 of the base 1. The fastener can be a rivet or a bolt in the prior art.

[0048] It should be understood that the above description is for illustration and not for limitation. By reading the above description, many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by these claims. For the purpose of comprehensiveness, all articles and references, including the disclosures of patent applications and announcements, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to abandon the subject matter, nor should it be considered that the utility model does not consider the subject matter as part of the disclosed utility model subject matter.

Claims

1. A lighting device, characterized in that: include: a heat sink comprising a base having a first side and an opposing second side; and a plurality of heat dissipation units, each heat dissipation unit comprising at least two fins and a base, the fins being disposed on the second side of the base, the heat dissipation unit being disposed on the base, the first side of the base forming a mounting plane, and the base constituting at least a portion of the mounting plane; and The light source comprises a lamp board and lamp beads arranged on the lamp board, and the lamp board is attached to the mounting plane of the radiator.

2. The lighting device according to claim 1, characterized in that: When the lamp board is mounted to the heat sink, the lamp board is directly attached to the heat dissipation unit.

3. The lighting device according to claim 2, characterized in that: The surface of the lamp panel is in contact with the surface of the substrate.

4. The lighting device according to claim 3, characterized in that: The lighting device further comprises a positioning unit, and the heat dissipation unit is positioned on the base through the positioning unit.

5. The lighting device according to claim 4, characterized in that: The positioning unit is a hole, and the fin is positioned through the hole.

6. The lighting device according to claim 5, characterized in that: A fin is formed on each of the two sides of the substrate in the width direction.

7. The lighting device according to claim 6, characterized in that: The heat dissipation unit is formed by sheet metal, and the base is formed by sheet metal.

8. The lighting device according to any one of claims 1 to 7, characterized in that: The heat sink is square, and the fins of the heat sink unit are arranged along the length direction of the heat sink.

9. The lighting device according to any one of claims 1 to 7, characterized in that: The base includes a plurality of holes; the substrate includes a first surface and an opposite second surface, the at least two fins are located on the second surface of the substrate, the at least two fins of the heat dissipation unit pass through the holes of the base so that the fins are arranged on the second side of the base, and the heat dissipation unit is arranged on the base, and the first side of the base and the first surface of the substrate together form a mounting plane.

10. The lighting device according to claim 8, characterized in that: The two ends of the base are respectively provided with an end wall, and the fin is arranged in the space between the end walls at the two ends of the base, and the end wall and the base are formed as an integral structure.

11. The lighting device according to any one of claims 1 to 7, characterized in that: The heat sink is square, and the fins of the heat sink unit are arranged along the width direction of the heat sink.

12. The lighting device according to claim 11, characterized in that: The two ends of the base are respectively provided with an end wall, and the fin is arranged in the space between the end walls at the two ends of the base.

13. The lighting device according to claim 12, characterized in that: The end wall and the base are formed as an integral structure.

14. The lighting device according to any one of claims 1 to 7, characterized in that: The heat sink is substantially circular, and the heat dissipation units are evenly arranged along the circumference of the base.

15. The lighting device according to claim 14, characterized in that: The angle between adjacent fins is between 7° and 15°.

16. The lighting device according to claim 15, characterized in that: The shortest distance between adjacent fins is greater than 4 mm.

17. The lighting device according to any one of claims 1 to 7, characterized in that: The heat sink includes a heat conducting sheet having a heat conducting portion extending along a width direction of the substrate surface.

18. The lighting device according to claim 17, characterized in that: The surface of the heat conduction part and the surface of the base are located on the same plane, and the lamp board is in thermal contact with the surface of the base and the surface of the heat conduction part.

19. The lighting device according to claim 18, characterized in that: A ratio of an area of ​​a surface of the heat conducting portion to an area of ​​a surface of the base is greater than 0.06 and less than 0.

2.

20. The lighting device according to claim 19, characterized in that: A heat sink is arranged on the heat conducting sheet. The heat sink passes through the hole on the base and is arranged on the second side of the base.

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