A light source module and a lighting fixture

Abstract

The utility model provides a light source module and lighting lamps and lanterns, wherein, the light source module includes: lens unit, first radiating unit, the lens unit cover is located in first radiating unit, first radiating unit includes ceramic heat sink and multiple light sources, multiple light sources evenly distribute in the top end surface of ceramic heat sink, second radiating unit includes metal heat sink, and the top of metal heat sink is fixedly connected with the bottom of ceramic heat sink, the utility model discloses can pass through the synergic effect of ceramic transverse diffusion heat and metal vertical heat conduction, further improved the heat dissipation performance, satisfies the heat dissipation demand of high power LED lamps and lanterns.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, and in particular to a light source module and a lighting fixture. Background Technology

[0002] Current LED lighting heat dissipation technology mainly relies on metal heat sinks (such as aluminum alloys) combined with aluminum substrate structures, but this heat dissipation method has the following significant drawbacks:

[0003] (1) The temperature resistance of aluminum substrate is limited: its temperature resistance depends on the material of the insulation layer. Generally, the temperature resistance is around 130℃. At high temperatures, aging and thermal decomposition may occur, affecting the insulation.

[0004] (2) The balance between insulation and thermal conductivity of aluminum substrate: The insulation layer of aluminum substrate is usually made of polymer materials (such as epoxy resin) or ceramic-filled composite materials, with a thickness of 50 to 200 μm. Its design needs to balance insulation and thermal conductivity. Too thick will hinder heat dissipation, while too thin may cause short circuit risk.

[0005] (3) Thermal resistance bottleneck: The thermal conductivity of aluminum substrate is low (about 1.0 to 1.5 W / (m·K)), which reduces the overall heat dissipation efficiency, especially in high temperature environment, which can easily cause LED light decay (lifetime shortened by 30%-50%).

[0006] Therefore, it is necessary to provide a light source module and lighting fixture to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0007] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a light source module and lighting fixture to solve the technical problem that the poor temperature resistance and thermal conductivity of aluminum substrates and the high interfacial thermal resistance of metal heat sinks make it difficult to meet the heat dissipation requirements of high-power LED lamps.

[0008] To solve the above-mentioned technical problems, this utility model provides a light source module, including:

[0009] Lens unit;

[0010] A first heat dissipation unit, wherein the lens unit is disposed on the first heat dissipation unit; the first heat dissipation unit includes a ceramic heat sink and multiple light sources, wherein the multiple light sources are evenly distributed on the top surface of the ceramic heat sink;

[0011] The second heat dissipation unit includes a metal heat sink, the top of which is fixedly connected to the bottom of the ceramic heat sink.

[0012] The light source module provided by this utility model has the following beneficial effects:

[0013] Multiple light sources in the first heat dissipation unit are evenly distributed on the ceramic heat sink, and the top of the metal heat sink in the second heat dissipation unit is fixed to the bottom of the ceramic heat sink. This design utilizes a synergistic heat dissipation method combining the ceramic and metal heat sinks. The ceramic heat sink itself has excellent temperature resistance and thermal conductivity. The exposed sides of the ceramic heat sink are in direct contact with the air, increasing the heat dissipation area. Its low interfacial thermal resistance allows for rapid lateral diffusion of heat generated by electronic components such as light sources, improving heat dissipation efficiency. Furthermore, the metal and ceramic heat sinks are tightly integrated to form a composite heat dissipation structure, vertically expelling the heat transferred from the ceramic heat sink to the external environment. This combination creates a synergistic effect of lateral diffusion from the ceramic and vertical expulsion from the metal, further improving heat dissipation performance and meeting the heat dissipation requirements of high-power LED lighting fixtures.

[0014] Furthermore, it also includes a filler, which has a plurality of hollow protrusions along its length extension direction, and the bottom end face of the ceramic heat sink has a plurality of grooves that are adapted to the protrusions along its length extension direction, and the protrusions are fitted into the grooves.

[0015] Furthermore, the top surface of the metal heat sink is uniformly provided with a plurality of protrusions that are adapted to the protrusion along its length extension direction, and the protrusions are fitted into the protrusion.

[0016] Furthermore, it also includes fasteners; the ceramic heat sink has a first fastening hole adapted to the fastener, the filler has a second fastening hole corresponding to the first fastening hole, the metal heat sink has a third fastening hole corresponding to the second fastening hole, and the fastener passes through the first fastening hole, the second fastening hole, and the third fastening hole in sequence to fix the ceramic heat sink and the metal heat sink in place.

[0017] Furthermore, the filler is made of high thermal conductivity silicone grease.

[0018] Furthermore, it also includes a welding layer, through which the ceramic heat sink is fixedly installed to the metal heat sink.

[0019] Furthermore, the lens unit includes a base and a plurality of lenses corresponding to the light source, with the plurality of lenses disposed on the top of the base.

[0020] Furthermore, it also includes a sealing element, wherein the bottom of the base is provided with a sealing groove that is adapted to the sealing element, and the sealing element is snapped into the sealing groove.

[0021] Furthermore, the second heat dissipation unit also includes a plurality of heat sinks, which are evenly distributed on the bottom surface of the metal heat sink.

[0022] To solve the above-mentioned technical problems, this utility model also provides a lighting fixture, including: the light source module as described above.

[0023] The beneficial effects of the lighting fixture provided by this utility model are the same as those of the light source module described above. Attached Figure Description

[0024] Figure 1 This is an exploded view of the light source module in one embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the light source module in one embodiment of the present invention;

[0026] Figure 3 This is an exploded view of the light source module in another embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the light source module in another embodiment of the present invention.

[0028] Component designation explanation

[0029] 1. Lens unit; 11. Base; 12. Lens; 2. First heat dissipation unit; 21. Ceramic heat sink; 211. Groove; 212. First fastening hole; 22. Light source; 3. Second heat dissipation unit; 31. Metal heat sink; 311. Protrusion; 312. Third fastening hole; 32. Heat sink fin; 4. Filler; 41. Protrusion; 42. Second fastening hole; 5. Fastener; 6. Welding layer; 7. Seal; 8. Waterproof sealing gasket; 9. Metal pressure plate; 10. 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] As the power of LED lights continues to increase, the poor temperature resistance of aluminum substrates often necessitates a direct increase in the size of metal heat sinks, leading to a continuous rise in manufacturing material costs and creating a trade-off between temperature resistance and product weight (cost). Furthermore, in practical applications, to ensure product safety, the thermal conductivity of the aluminum substrate is often sacrificed to improve insulation, resulting in poor thermal conductivity and a trade-off between insulation and thermal conductivity. In addition, existing heat dissipation structures using metal heat sinks and aluminum substrates have long heat conduction paths and high interfacial thermal resistance, making it difficult to meet the heat dissipation requirements of high-power LED lights and reducing heat dissipation efficiency. In short, existing heat dissipation technologies, due to the poor temperature resistance and thermal conductivity of aluminum substrates and the high interfacial thermal resistance of metal heat sinks, are insufficient to meet the heat dissipation requirements of high-power LED lights. To address this, this invention provides a light source module and lighting fixture that further improves heat dissipation performance through the synergistic effect of lateral heat diffusion from ceramics and longitudinal heat conduction from metal, thus meeting the heat dissipation requirements of high-power LED lights.

[0035] like Figures 1-4 As shown, an embodiment of this utility model provides a light source module, including: a lens unit 1, a first heat dissipation unit 2, and a second heat dissipation unit 3. The lens unit 1 covers the first heat dissipation unit 2, and the first heat dissipation unit 2 covers the second heat dissipation unit 3.

[0036] The first heat dissipation unit 2 includes a ceramic heat sink 21 and multiple light sources 22. The multiple light sources 22 are evenly distributed on the top surface of the ceramic heat sink 21. The second heat dissipation unit 3 includes a metal heat sink 31, the top of which is fixedly connected to the bottom of the ceramic heat sink 21.

[0037] Multiple light sources 22 of the first heat dissipation unit 2 are evenly distributed on the ceramic heat sink 21, and the top of the metal heat sink 31 of the second heat dissipation unit 3 is fixed to the bottom of the ceramic heat sink 21. This design utilizes a synergistic heat dissipation method between the ceramic heat sink 21 and the metal heat sink 31. Based on the excellent temperature resistance and thermal conductivity of the ceramic heat sink 21, the exposed sides of the ceramic heat sink 21 are in direct contact with the air, increasing the heat dissipation area. Its low interfacial thermal resistance allows for rapid lateral diffusion of heat generated by electronic components such as the light sources 22, improving heat dissipation efficiency. Furthermore, the metal heat sink 31 and the ceramic heat sink 21 are tightly integrated to form a composite heat dissipation structure, which vertically dissipates the heat transferred by the ceramic heat sink 21 into the external environment. The combination of the two creates a synergistic effect of lateral diffusion from the ceramic and vertical dissipation from the metal, further improving heat dissipation performance and meeting the heat dissipation requirements of high-power LED lamps.

[0038] Testing of the light source module of this utility model embodiment shows that, compared with traditional metal heat sinks, the operating temperature of the light source module of this utility model embodiment can be reduced by 20%-30%; and the weight can be reduced by 30%, and the cost can be reduced by 20%.

[0039] For example, the ceramic heat sink 21 is made of alumina ceramic (thermal conductivity ≥20W / m·K) or aluminum nitride ceramic (thermal conductivity ≥170W / m·K), and is directly used as the carrier of the light source 22. The lens unit 1 is placed on the top of the ceramic heat sink 21, and the bottom of the ceramic heat sink 21 is placed on top of the metal heat sink 31. That is, the sides of the ceramic heat sink 21 are not covered and are exposed, which maximizes the contact area with the air and enhances natural convection heat dissipation. At the same time, based on the extremely high temperature resistance (melting point >2000℃), thermal conductivity and insulation (volume resistivity >10^14Ω·cm), and extremely high emissivity (ceramic emissivity 0.95, while that of aluminum or copper is only 0.05), the overall heat dissipation capacity of the light source module is greatly improved, further improving the heat dissipation efficiency. This solves the problem of poor temperature resistance of existing aluminum substrates and also improves insulation and thermal conductivity.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the light source module further includes a filler 4. The filler 4 has multiple hollow protrusions 41 along its length. The bottom surface of the ceramic heat sink 21 has multiple grooves 211 that fit the protrusions 41 along its length, with the protrusions 41 being engaged with the grooves 211. In this embodiment, the engagement and fixation of the protrusions 41 of the filler 4 and the grooves 211 of the ceramic heat sink 21 increases the contact area of ​​the heat-conducting interface, facilitating heat dispersion and conduction; and the design of the filler 4 between the ceramic heat sink 21 and the metal heat sink 31 reduces the interfacial thermal resistance.

[0041] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, a plurality of protrusions 311 adapted to the protrusions 41 are uniformly arranged on the top surface of the metal heat sink 31 along its length extension direction, and the protrusions 311 are embedded in the protrusions 41. In this embodiment, the plurality of protrusions 311 provided on the metal heat sink 31 are embedded in the hollow interior of the corresponding protrusions 41, which increases the thermally conductive contact area, improves the heat dissipation efficiency, and reduces the interfacial thermal resistance between the ceramic heat sink 21 and the metal heat sink 31.

[0042] By using a concave-convex combination at the interface between the ceramic heat sink 21 and the metal heat sink 31, the contact area of ​​the heat conduction interface is increased, which is beneficial for heat dispersion and conduction. At the same time, the exposed ceramic surface on the side can enhance the heat radiation capacity of the heat sink.

[0043] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the light source module further includes a fastener 5. A first fastening hole 212 adapted to the fastener 5 is provided on the ceramic heat sink 21. A second fastening hole 42 corresponding to the first fastening hole 212 is provided on the filler 4. A third fastening hole 312 corresponding to the second fastening hole 42 is provided on the metal heat sink 31. The fastener 5 passes through the first fastening hole 212, the second fastening hole 42, and the third fastening hole 312 in sequence to fix the ceramic heat sink 21 and the metal heat sink 31 in place. Exemplarily, the fastener 5 is a metal screw. Using a metal screw to mechanically fix the ceramic heat sink 21 and the metal heat sink 31 together is a simple and easy-to-implement structure.

[0044] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the filler 4 is made of high thermal conductivity silicone grease. It should be understood that high thermal conductivity silicone grease is a thermal interface material made of organosilicone as the base and with added high thermal conductivity fillers (such as metal oxides, nitrides or carbon materials). Its thermal conductivity is usually above 5-10 W / (m·K), which is much higher than that of ordinary silicone grease (1-3 W / (m·K)). It is mainly used to fill the microscopic gaps between the heating element and the heat sink, significantly reducing the contact thermal resistance and improving the heat dissipation efficiency.

[0045] The ceramic heat sink 21 and the metal heat sink 31 are fixed together by using fasteners 5 for mechanical connection, and a high thermal conductivity thermal interface material filler 4 is filled between the ceramic heat sink 21 and the metal heat sink 31. This method is simple, easy to implement, and highly reliable.

[0046] The light source module, which uses fastener 5 to fix the ceramic heat sink 21 and the metal heat sink 31, was tested. The specific results are as follows: after 168 hours of continuous operation at an ambient temperature of 55℃, the LED junction temperature was 82℃ (compared to 103℃ for traditional metal heat sinks), and the heat dissipation efficiency was improved by 20%; after vibration testing (frequency 10-55Hz, 5G acceleration), there was no structural cracking, no ceramic detachment, and the reliability met the IP65 standard; the installation process was simplified, and the manufacturing cost was reduced by 20%.

[0047] like Figure 3 and Figure 4As shown, in some other embodiments of this utility model, the light source module further includes a welding layer 6. The ceramic heat sink 21 is fixedly installed to the metal heat sink 31 through the welding layer 6. In this embodiment, the ceramic heat sink 21 and the metal heat sink 31 are welded together by using the welding layer 6, and the fixing structure is simple and easy to implement. Exemplarily, the ceramic heat sink 21 is embedded into the metal heat sink 31 using a low-temperature AMB (Active Metal Brazing) welding process, and the two are directly welded together. The low interface thermal resistance is ≤0.2K / W (0.8K / W for traditional adhesive bonding), the high thermal conductivity is ≥10W / m·K, and the welding yield is increased to 95% (75% for traditional processes). At the same time, the exposed ceramic surface on the side can improve the overall heat radiation capacity of the heat sink. This process has excellent thermal conductivity. It should be understood that low-temperature AMB soldering is a technique that directly brazes ceramic to metal (usually copper). Compared to traditional high-temperature AMB (800–950°C), low-temperature AMB soldering generally refers to a method where the peak soldering temperature is controlled between 200–420°C to meet the packaging requirements of heat-sensitive devices or modules. It should be noted that in this embodiment, the bottom of the ceramic heat sink 21 and the surface of the metal heat sink 31 are smooth and do not have any uneven structures.

[0048] The light source module using a welding layer 6 to fix the ceramic heat sink 21 and the metal heat sink 31 was tested. The specific results are as follows: Under the same luminous intensity requirements, the product size can be reduced by more than 30%. After continuous operation for 168 hours at an ambient temperature of 55℃, the LED junction temperature is 74℃ (95℃ for traditional aluminum substrate combined with metal heat sink); the mechanical strength is increased by 50% (passing tensile test, load-bearing capacity ≥50kg), and the ceramic heat sink 21 did not detach or warp after 200 cycles of thermal shock from -40 to 150℃; the overall cost is reduced by 15% (the cost of traditional metal heat sink accounts for 30%, while this solution reduces it to 12%).

[0049] The ceramic heat sink 21 and the metal heat sink 31 can be fixed and installed in a way that allows for the selection of one or more connection methods based on the different usage environments, heat dissipation requirements and cost requirements of the lighting fixtures, providing high flexibility.

[0050] like Figure 1 and Figure 3 As shown, in some embodiments of this utility model, the lens unit 1 includes a base 11 and a plurality of lenses 12 corresponding to the light source 22, with the plurality of lenses 12 disposed on the top of the base 11. Specifically, by uniformly distributing convex lenses 12 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 the lens unit 1 covers the first heat dissipation unit 2, and the light source 22 is located in the corresponding cavity formed by the lenses 12, thereby improving the luminous efficiency of the lighting fixture.

[0051] like Figure 1 and Figure 3 As shown, in some embodiments of this utility model, the light source module further includes a sealing element 7. A sealing groove adapted to the sealing element 7 is provided at the bottom of the base 11, and the sealing element 7 is snapped into the sealing groove. Exemplarily, the sealing element 7 is a silicone ring. The silicone ring is snapped into the sealing groove at the bottom of the base 11, and then liquid silicone is applied to the side of the base 11. After assembly, the liquid silicone cures to form a secondary seal, simultaneously bonding the contact surfaces between the base 11 and the ceramic heat sink 21, thereby firmly sealing the base 11 and the ceramic heat sink 21 and preventing moisture, dust, salt spray, etc., from entering the interior between the base 11 and the ceramic heat sink 21.

[0052] like Figure 1 and Figure 3 As shown, in some embodiments of this invention, the second heat dissipation unit 3 further includes a plurality of heat sinks 32. The plurality of heat sinks 32 are evenly distributed on the bottom surface of the metal heat sink 31. In this embodiment, by providing a plurality of heat sinks 32 at the bottom of the metal heat sink 31, the heat dissipation surface area is significantly increased, and the heat exchange efficiency under natural convection is greatly improved.

[0053] like Figure 1 and Figure 3 As shown, in some embodiments of this utility model, the light source module further includes a waterproof sealing gasket 8, a metal pressure plate 9, and a coupler 10. Specifically, a mounting hole is provided in the middle of the metal heat sink 31, and a first through hole and a second through hole corresponding to the mounting hole are respectively provided on the waterproof sealing gasket 8 and the metal pressure plate 9. The waterproof sealing gasket 8 is attached to the corresponding position of the mounting hole of the metal heat sink 31, and the metal pressure plate 9 and the waterproof sealing gasket 8 are fixed together with fastening screws, so that the mounting hole, the first through hole and the second through hole are aligned. The coupler 10 is assembled onto the metal heat sink 31 using a connector.

[0054] An embodiment of this utility model also provides a lighting fixture, including: the light source module as described above. Furthermore, the lighting fixture also includes a lamp post and a lamp body, with the light source module disposed within the lamp body and the lamp body assembled onto the lamp post. The structural components and beneficial effects of the lighting fixture in this embodiment are described above with reference to the light source module description, and will not be repeated here.

[0055] In summary, addressing the technical problems in existing technologies where the poor temperature resistance and thermal conductivity of aluminum substrates and the high interfacial thermal resistance of metal heat sinks make it difficult to meet the heat dissipation requirements of high-power LED lamps, this utility model provides a light source module and lighting fixture. Through the coordinated heat dissipation of the ceramic heat sink 21 and the metal heat sink 31, the following beneficial effects are achieved:

[0056] (1) Excellent heat dissipation performance: The exposed ceramic heat sink 21 on the side is in direct contact with the air, which increases the heat dissipation area, reduces the interface thermal resistance, and improves the heat dissipation efficiency. In addition, the metal heat sink 31 and the ceramic heat sink 21 are tightly combined to form a composite heat dissipation structure, which further improves the heat dissipation performance. (2) Lightweight and low cost: The ceramic heat sink 21 replaces part of the metal heat sink, which simplifies the existing structure, reduces the size of the metal heat sink, reduces the weight, and reduces the material cost. (3) Good insulation performance: The ceramic heat sink 21 itself has good insulation performance (volume resistivity: >10^14Ω·cm), which improves the safety of the lighting fixture. (4) High temperature resistance and corrosion resistance: The ceramic material is resistant to high temperature (melting point: >2000℃) and corrosion, and can be used in various harsh environments. (5) High mechanical strength: Both the metal heat sink and the ceramic heat sink have good mechanical strength, which improves the overall strength and reliability of the lighting fixture. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial utilization value.

[0057] 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 light source module, characterized in that, include: Lens unit; The first heat dissipation unit, wherein the lens unit is disposed on the first heat dissipation unit; The first heat dissipation unit includes a ceramic heat sink and multiple light sources, with the multiple light sources evenly distributed on the top surface of the ceramic heat sink. The second heat dissipation unit includes a metal heat sink, the top of which is fixedly connected to the bottom of the ceramic heat sink.

2. The light source module according to claim 1, characterized in that, It also includes a filler, which has a plurality of hollow protrusions along its length extension direction, and the bottom end face of the ceramic heat sink has a plurality of grooves that are adapted to the protrusions along its length extension direction, and the protrusions are fitted into the grooves.

3. The light source module according to claim 2, characterized in that, The top surface of the metal heat sink is uniformly provided with a plurality of protrusions that are adapted to the protrusion along its length extension direction, and the protrusions are fitted into the protrusion.

4. The light source module according to claim 2, characterized in that, It also includes fasteners; the ceramic heat sink has a first fastening hole adapted to the fastener, the filler has a second fastening hole corresponding to the first fastening hole, and the metal heat sink has a third fastening hole corresponding to the second fastening hole. The fastener passes through the first fastening hole, the second fastening hole, and the third fastening hole in sequence to fix the ceramic heat sink and the metal heat sink in place.

5. The light source module according to claim 2, characterized in that, The filler is made of high thermal conductivity silicone grease.

6. The light source module according to claim 1, characterized in that, It also includes a welding layer, through which the ceramic heat sink is fixedly installed to the metal heat sink.

7. The light source module according to claim 1, characterized in that, The lens unit includes a base and a plurality of lenses corresponding to the light source, with the plurality of lenses disposed on the top of the base.

8. The light source module according to claim 7, characterized in that, It also includes a sealing element, and the bottom of the base is provided with a sealing groove that is adapted to the sealing element, and the sealing element is snapped into the sealing groove.

9. The light source module according to claim 1, characterized in that, The second heat dissipation unit also includes a plurality of heat sinks, which are evenly distributed on the bottom surface of the metal heat sink.

10. A lighting fixture, characterized in that, include: The light source module as described in any one of claims 1 to 9.

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