A lighting module and an outdoor lighting device

Abstract

This utility model provides a lighting module and an outdoor lighting device. The lighting module includes: a lens unit comprising a base, an outer component, and an inner component, wherein the outer component and the inner component are respectively disposed around the outer periphery of the base at the bottom of the base; the outer component and the inner component are spaced apart, and the height of the outer component is higher than that of the inner component, so that a groove is formed between the inner wall of the outer component and the outer wall of the inner component; a first heat dissipation unit comprising a ceramic heat dissipation plate, wherein the outer component is located outside the ceramic heat dissipation plate, and the bottom of the inner component abuts against the top surface of the ceramic heat dissipation plate; and an adhesive layer disposed within the groove. This utility model can form a sealed lighting cavity between the lens unit and the ceramic heat dissipation plate through the dual effects of physical sealing and chemical bonding, meeting the sealing requirements of outdoor lighting devices.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, and in particular to a lighting module and an outdoor lighting device. Background Technology

[0002] Currently, traditional LED lighting fixtures mostly use sealing rings, such as rubber O-rings and silicone gaskets, for waterproofing. However, sealing ring structures have the following disadvantages:

[0003] (1) Aging failure: When the sealing ring is exposed to ultraviolet rays and alternating high and low temperatures for a long time, it is easy to harden and crack. The resulting deformation will lead to intermittent leakage, such as instantaneous failure under water pressure impact during heavy rain.

[0004] (2) Installation depends on precision: The sealing ring needs to be customized to strictly match the specific dimensions of the lamp structure. The processing precision of the lamp structure dimensions and the compression of the sealing ring needs to reach ±0.05mm, which will increase the mold making cost and the processing and assembly costs will be high.

[0005] (3) Poor environmental adaptability: At extreme temperatures, such as -50℃ to 80℃, the thermal expansion of the sealing ring and the lamp structural components is mismatched, and gaps are easily generated at the connection between the sealing ring and the lamp structural components.

[0006] To address the shortcomings of the aforementioned sealing rings, a double-layer structure of sealing ring + waterproof adhesive was designed. However, this double-layer structure still has problems. Due to the difference in thermal expansion coefficients between the sealant and the sealing ring, the bonding interface between the two can peel off. For example, when the temperature difference is 80℃, the peeling force can reach 5N / mm. 2 The sealing ring and waterproof adhesive have poor compatibility. Furthermore, this double-layer structure requires installing the sealing ring first, followed by an additional adhesive application step, making the process complex and significantly reducing production efficiency.

[0007] Therefore, it is necessary to provide a lighting module and an outdoor lighting device to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0008] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a lighting module and an outdoor lighting device to solve the technical problems that the sealing performance of the prior art cannot meet the outdoor requirements and the process assembly is complicated.

[0009] To solve the above-mentioned technical problems, this utility model provides a lighting module, comprising:

[0010] The lens unit includes a base, an outer part, and an inner part. The outer part and the inner part are respectively disposed around the outer periphery of the base at the bottom of the base. The outer part and the inner part are spaced apart, and the height of the outer part is higher than that of the inner part, so that a groove is formed between the inner wall of the outer part and the outer wall of the inner part.

[0011] The first heat dissipation unit includes a ceramic heat dissipation plate, the outer component is located on the outer side of the ceramic heat dissipation plate, and the bottom of the inner component abuts against the top surface of the ceramic heat dissipation plate.

[0012] An adhesive layer is disposed within the adhesive tank.

[0013] The lighting module provided by this utility model has the following beneficial effects:

[0014] By setting an outer side component and an inner side component on the outer periphery of the base, with the outer side component located outside the inner side component and a certain distance between them, and the outer side component being higher than the inner side component, a glue groove is formed between the inner wall of the outer side component and the outer wall of the inner side component. The lens unit is then placed on the first heat dissipation unit, with the outer side component located outside the ceramic heat dissipation plate and the bottom of the inner side component abutting against the top surface of the ceramic heat dissipation plate. A glue layer is placed in the glue groove, completely filling the geometric gap between the lens unit and the first heat dissipation unit, preventing moisture, dust, etc., from entering the interior between the lens unit and the first heat dissipation unit. This is the physical sealing effect. At the same time, chemical bonding occurs between the glue layer and the ceramic heat dissipation plate, as well as between the glue layer and the base, the outer side component, and the inner side component. This is the chemical bonding effect. Thus, through the dual effects of physical sealing and chemical bonding, a sealed lighting cavity is formed between the lens unit and the ceramic heat dissipation plate, meeting the sealing requirements of outdoor lighting devices.

[0015] Furthermore, the adhesive groove is a V-shaped groove or a U-shaped groove.

[0016] Furthermore, the adhesive layer is an organosilicon or modified silane sealant layer.

[0017] Furthermore, the first heat dissipation unit also includes multiple light sources, which are arranged in an array on the top of the ceramic heat sink.

[0018] Furthermore, the lens unit also includes a plurality of lenses corresponding to the light source, the lenses being disposed on the top of the base.

[0019] Furthermore, the light source is an LED lamp bead or a COB lamp bead.

[0020] Furthermore, it also includes a second heat dissipation unit, which includes a metal heat sink, with the bottom of the ceramic heat sink connected to the top of the metal heat sink.

[0021] Furthermore, it also includes fasteners. The ceramic heat sink has a first fastening hole, and the metal heat sink has a second fastening hole corresponding to the first fastening hole. The fasteners pass through the first fastening hole and the second fastening hole to fix the ceramic heat sink and the metal heat sink together.

[0022] Furthermore, the second heat dissipation unit also includes a plurality of heat dissipation fins, which are evenly disposed on the bottom of the metal heat sink.

[0023] To solve the above-mentioned technical problems, this utility model also provides an outdoor lighting device, including: the lighting module as described above.

[0024] The beneficial effects of the outdoor lighting device provided by this utility model are the same as those of the lighting module described above. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the lighting module according to an embodiment of the present utility model;

[0026] Figure 2 This is an exploded view of the lighting module according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the lens unit in an embodiment of the present invention.

[0028] Component designation explanation

[0029] 1. Lens unit; 11. Base; 12. Outer component; 13. Inner component; 14. Adhesive groove; 15. Lens; 2. First heat dissipation unit; 21. Ceramic heat sink; 211. First fastening hole; 22. Light source; 3. Adhesive layer; 4. Second heat dissipation unit; 41. Metal heat sink; 411. Second fastening hole; 42. Heat dissipation fins; 5. Fastener; 6. Sealing gasket; 7. Metal pressure plate; 8. Fastening screw; 9. Coupler. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terminology used herein is for describing specific embodiments only and is not intended to limit this application. Spatial terms such as "upper," "lower," "left," "right," "below," "below," "lower part," "above," "upper part," etc., may be used in the text to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0034] like Figures 1-3 As shown, an embodiment of the present invention provides an illumination module, including: a lens unit 1, a first heat dissipation unit 2, and an adhesive layer 3.

[0035] Lens unit 1 includes a base 11, an outer member 12, and an inner member 13. The outer member 12 and the inner member 13 are respectively disposed around the outer periphery of the base 11 at the bottom of the base 11. The outer member 12 and the inner member 13 are spaced apart, and the height of the outer member 12 is higher than that of the inner member 13, so that a groove 14 is formed between the inner wall of the outer member 12 and the outer wall of the inner member 13. The first heat dissipation unit 2 includes a ceramic heat sink 21, the outer member 12 is located outside the ceramic heat sink 21, and the bottom of the inner member 13 abuts against the top surface of the ceramic heat sink 21. An adhesive layer 3 is disposed in the groove 14.

[0036] By setting an outer component 12 and an inner component 13 on the outer periphery of the base 11, with the outer component 12 located outside the inner component 13 and a certain distance between them, and the height of the outer component 12 being higher than that of the inner component 13, a glue groove 14 is formed between the inner wall of the outer component 12 and the outer wall of the inner component 13. The lens unit 1 is then placed on the first heat dissipation unit 2, with the outer component 12 located outside the ceramic heat dissipation plate 21 and the bottom of the inner component 13 abutting against the top surface of the ceramic heat dissipation plate 21. An adhesive layer 3 is set in the glue groove 14, so that the geometric gap formed between the lens unit 1 and the first heat dissipation unit 2 is completely filled by the adhesive layer 3, preventing moisture, dust, etc. from entering the interior between the lens unit 1 and the first heat dissipation unit 2. This is the physical sealing effect. At the same time, the interface between the adhesive layer 3 and the ceramic heat dissipation plate 21, as well as the interface between the adhesive layer 3 and the base 11, the outer component 12, and the inner component 13, undergo chemical bonding. This is the chemical adhesive effect. The lighting module of this utility model achieves a sealed lighting cavity between the lens unit 1 and the ceramic heat sink 21 through the dual effects of physical sealing and chemical bonding, and fixes the lens unit 1 and the ceramic heat sink 21 together to meet the sealing requirements of outdoor lighting devices.

[0037] like Figure 1 and Figure 3 As shown, in some embodiments of this utility model, the adhesive groove 14 is a V-shaped groove or a U-shaped groove. By designing the adhesive groove 14 on the outer periphery of the lens unit 1, the joint area between the ceramic heat sink 21 and the lens unit 1 can be directly sealed during adhesive application and installation, forming a continuous and uninterrupted sealing layer. The interface durability is superior to that of a single physical seal. For example, the adhesive groove 14 is a U-shaped groove with a width of 2mm to 5mm and a height of 2mm. The height of the outer part 12 is one millimeter higher than that of the inner part 13, thereby accommodating the adhesive material and increasing the adhesion area of ​​the adhesive material. This allows the adhesive layer 3 to fully cover the geometric gap between the lens unit 1 and the first heat sink 2, improving the waterproof performance.

[0038] like Figure 1As shown, in some embodiments of this utility model, the adhesive layer 3 is an organosilicon or modified silane sealant layer. It should be understood that the sealant is a high-performance elastic sealing material made from a silane-terminated polymer modified with fillers and functional additives, possessing outstanding advantages such as environmental friendliness, high adhesion, high temperature resistance, weather resistance, and paintability. In this embodiment, the sealant is placed in the adhesive tank 14. The silane-terminated (–Si–OR) of the sealant encounters the –OH groups on the surfaces of the ceramic heat sink 21, base 11, outer part 12, and inner part 13 (glass / metal / plastic), undergoing a moisture condensation reaction to generate –Si–O–M covalent bonds (M = Al, Si, Ti, Fe…); a three-dimensional siloxane network is formed internally, providing adhesive strength, thereby tightly bonding the contact surfaces between the lens unit 1 and the first heat dissipation unit 2 together to form a sealed lighting cavity.

[0039] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the first heat dissipation unit 2 further includes multiple light sources 22. The multiple light sources 22 are arranged in an array on the top of the ceramic heat sink 21. In this embodiment, the light sources 22 are used to provide illumination for the lamp, and higher light density and brightness output are achieved by uniformly distributing the array of light sources 22 on the top of the ceramic heat sink 21. The ceramic heat sink 21 dissipates heat for the light sources 22 and other electronic components within the lamp. Exemplarily, three arrays of light sources 22 are uniformly distributed on the ceramic heat sink 21.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the lens unit 1 further includes a plurality of lenses 15 corresponding to the light source 22. The lenses 15 are disposed on the top of the base 11. Specifically, by uniformly distributing convex lenses 15 corresponding to the light source 22 on the top of the base 11, a cavity for placing the light source 22 is formed, so that when the lens unit 1 is covered on the first heat dissipation unit 2, the light source 22 is exactly located in the cavity formed by the lenses 15, thereby improving the luminous efficiency of the lamp.

[0041] like Figure 1 As shown, in some embodiments of this utility model, the light source 22 is an LED bead or a COB bead. It should be understood that an LED bead is an independent light source unit formed by packaging a single light-emitting diode chip; a COB (Chip On Board) bead is a packaging technology in which multiple LED chips are directly integrated on a substrate to form a high-density surface light source.

[0042] like Figure 1 and Figure 2As shown, in some embodiments of this utility model, the lighting module further includes a second heat dissipation unit 4. The second heat dissipation unit 4 includes a metal heat sink 41, with the bottom of the ceramic heat sink 21 connected to the top of the metal heat sink 41. In this embodiment, based on the high thermal conductivity and electrical insulation of ceramic materials (such as aluminum nitride ceramics and alumina ceramics), heat can be rapidly diffused laterally while avoiding the risk of short circuits. The bottom surface of the ceramic heat sink 21 is attached to the top surface of the metal heat sink 41, and the metal heat sink 41 longitudinally conducts the heat transferred by the ceramic heat sink 21 into the external environment. The combination of the two forms a synergistic effect of lateral diffusion by the ceramic and longitudinal conduction by the metal, improving the heat dissipation effect of the lamp.

[0043] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the lighting module further includes a fastener 5. A first fastening hole 211 is provided on the ceramic heat sink 21, and a second fastening hole 411 corresponding to the first fastening hole 211 is provided on the metal heat sink 41. The fastener 5 passes through the first fastening hole 211 and the second fastening hole 411 to fix the ceramic heat sink 21 and the metal heat sink 41 together. Exemplarily, the fastener is a screw. The screw and a plastic washer cooperate to pass through the first fastening hole 211 and the second fastening hole 411, assembling the ceramic heat sink 21 onto the metal heat sink 41, so that the bottom surface of the ceramic heat sink 21 is in contact with the corresponding position of the top surface of the metal heat sink 41.

[0044] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the second heat dissipation unit 4 further includes a plurality of heat dissipation fins 42. The plurality of heat dissipation fins 42 are evenly disposed on the bottom of the metal heat dissipation plate 41. In this embodiment, by providing a plurality of heat dissipation fins 42 on the bottom of the metal heat dissipation plate 41, the heat dissipation surface area is significantly increased, and the heat exchange efficiency under natural convection is greatly improved.

[0045] like Figure 2 As shown, in some embodiments of this utility model, the lighting module further includes a sealing gasket 6, a metal pressure plate 7, a fastening screw 8, and a coupler 9. Specifically, mounting holes are formed on the metal heat sink 41, and the sealing gasket 6 and the metal pressure plate 7 are respectively provided with a first through hole and a second through hole corresponding to the mounting holes. The sealing gasket 6 is fitted to the position corresponding to the mounting hole of the metal heat sink 41, and the metal pressure plate 7 and the sealing gasket 6 are fixed together by the fastening screw 8, so that the mounting hole, the first through hole, and the second through hole are aligned. The coupler 9 is connected to the metal heat sink 41 using a connector.

[0046] Exemplarily, the steps for installing the lighting module of this utility model embodiment are as follows: A conductive layer is printed on the surface of the ceramic heat sink 21 to mount and solder multiple light sources 22 on the conductive layer, and the P and N junctions of the light sources 22 are connected to the power input line through leads. A glue groove 14 with a width of 2-5 mm is opened at the connection between the lens unit 1 and the first heat sink 2, that is, an outer part 12 and an inner part 13 are provided on the outer periphery of the base 11, and the height of the outer part 12 is higher than that of the inner part 13 by one millimeter, so that a glue groove 14 is formed between the inner sidewall of the outer part 12 and the outer sidewall of the inner part 13, and the glue groove 14 is cleaned. The ceramic heat sink 21 and the metal heat sink 41 are fixedly assembled using screws through the first fastening hole 211 and the second fastening hole 411, so that the bottom end face of the ceramic heat sink 21 is attached to the top end face of the metal heat sink 41. Organosilicon or modified silane sealant is uniformly filled into the adhesive groove 14 of the lens unit 1. The outer periphery of the ceramic heat sink 21 is then assembled close to the adhesive groove 14. The sealant can be cured at room temperature or by heating (heating temperature, for example, 60–100°C, heating time, for example, 0.5–4 hours). After the sealant cures, it forms an elastomer, i.e., an adhesive layer 3, which seamlessly adheres to the ceramic heat sink 21 without bubbles or breaks. This ensures that the contact surface between the lens unit 1 and the ceramic heat sink 21 is firmly sealed through both physical sealing and chemical bonding. In essence, the sealant fills all the gaps between the lens unit 1 and the ceramic heat sink 21. After curing, the resulting elastomer acts like a rubber pad, constantly "pressing" against the interface when the lamp is subjected to changes in the external environment; this is the physical sealing effect. Simultaneously, the terminal silane groups (–Si–OR) of the sealant react with the –OH groups on the surfaces of the ceramic and lens unit 1 (glass / metal / plastic) through a moisture condensation reaction, generating –Si–O–M covalent bonds (M = Al, Si, Ti, Fe…); this is the chemical bonding effect. The lighting module of this embodiment, through the dual effects of physical sealing and chemical bonding, prevents moisture and dust from entering the interior between the lens unit 1 and the first heat sink 2, and fixes the lens unit 1 and the ceramic heat sink 21 together. The lighting module of this embodiment has passed IP68 testing: immersion in 2m water for 72 hours showed no water ingress; the sealant underwent 50 cycles of thermal shock: -40℃ (2h) → 85℃ (2h) without cracking.

[0047] An embodiment of this utility model also provides an outdoor lighting device, including: the lighting module as described above. Furthermore, the outdoor lighting device also includes a lamp post and a lamp body, with the lighting module disposed within the lamp body and the lamp body assembled onto the lamp post. The outdoor lighting device includes, but is not limited to, streetlights, tunnel lights, guardrail lights, supplementary lighting, high-mast lights, floodlights, and warning lights. The structural components and beneficial effects of the outdoor lighting device in this embodiment are described above with reference to the lighting module description, and will not be repeated here.

[0048] In summary, due to the low precision of ceramic component sintering, the sealing performance of existing lighting fixture sealing and waterproofing structures cannot meet outdoor requirements, and the assembly process is complex. To address this, this invention provides a lighting module and outdoor lighting device. An outer and inner component are respectively arranged on the outer periphery of the base, with the outer component located outside the inner component and a certain distance maintained between them. The outer component is higher than the inner component, thus forming a groove between the inner wall of the outer component and the outer wall of the inner component. The lens unit is then placed on the first heat dissipation unit, with the outer component located outside the ceramic heat dissipation plate. The bottom of the inner component abuts against the top surface of the ceramic heat dissipation plate. An adhesive layer is placed within the groove, completely filling the geometric gap between the lens unit and the first heat dissipation unit. After curing, a highly elastic material is formed, always "pressing" against the interface to prevent... Moisture and dust enter the space between the lens unit and the first heat dissipation unit, which constitutes a physical seal. Simultaneously, chemical bonding occurs at the interfaces between the adhesive layer and the ceramic heat dissipation plate, as well as between the adhesive layer and the base, outer components, and inner components, constituting a chemical bond. Through this dual action of physical sealing and chemical bonding, a sealed lighting cavity is formed between the lens unit and the first heat dissipation unit, increasing the sealing adhesion area and improving shear resistance. Compared to traditional planar structures, peel strength is increased by 230%, and interface durability is superior to single physical sealing. Furthermore, by fixing the lens unit and the ceramic heat dissipation plate together, the precision required for fitting various structural components and production costs are reduced. This makes it suitable for large-scale industrial manufacturing, expanding the tolerance range to ±0.5mm, eliminating the need for precise alignment, significantly improving production efficiency, and meeting the sealing requirements of outdoor lighting devices. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A lighting module, characterized in that, include: The lens unit includes a base, an outer part, and an inner part. The outer part and the inner part are respectively disposed around the outer periphery of the base at the bottom of the base. The outer part and the inner part are spaced apart, and the height of the outer part is higher than that of the inner part, so that a groove is formed between the inner wall of the outer part and the outer wall of the inner part. The first heat dissipation unit includes a ceramic heat dissipation plate, the outer component is located on the outer side of the ceramic heat dissipation plate, and the bottom of the inner component abuts against the top surface of the ceramic heat dissipation plate. An adhesive layer is disposed within the adhesive tank.

2. The lighting module according to claim 1, characterized in that, The glue groove is a V-shaped groove or a U-shaped groove.

3. The lighting module according to claim 1, characterized in that, The adhesive layer is an organosilicon or modified silane sealant layer.

4. The lighting module according to claim 1, characterized in that, The first heat dissipation unit also includes multiple light sources, which are arranged in an array on the top of the ceramic heat sink.

5. The lighting module according to claim 4, characterized in that, The lens unit also includes a plurality of lenses corresponding to the light source, and the lenses are disposed on the top of the base.

6. The lighting module according to claim 4, characterized in that, The light source is an LED lamp bead or a COB lamp bead.

7. The lighting module according to claim 1, characterized in that, It also includes a second heat dissipation unit, which includes a metal heat sink, with the bottom of the ceramic heat sink connected to the top of the metal heat sink.

8. The lighting module according to claim 7, characterized in that, It also includes fasteners. The ceramic heat sink has a first fastening hole, and the metal heat sink has a second fastening hole corresponding to the first fastening hole. The fasteners pass through the first fastening hole and the second fastening hole to fix the ceramic heat sink and the metal heat sink together.

9. The lighting module according to claim 7, characterized in that, The second heat dissipation unit also includes multiple heat dissipation fins, which are evenly arranged on the bottom of the metal heat dissipation plate.

10. An outdoor lighting device, characterized in that, include: The lighting module as described in any one of claims 1 to 9.

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