Light-emitting module and lighting lamp
By separating the heat dissipation cavity in the COB light-emitting module and optimizing the coolant flow path, the problems of heat dissipation and thinning are solved, achieving efficient heat dissipation and module thinning.
Patent Information
- Application Number
- CN202423303762.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing COB light-emitting modules struggle to balance heat dissipation performance and thinness, and the large size of liquid cooling devices increases module thickness.
The system employs a separate accommodating cavity as the first and second heat dissipation cavities, with coolant entering and exiting separately. Heat dissipation components are installed at the bottom and top of the light source, and the coolant flows in multiple heat dissipation slots, optimizing the flow path to improve heat dissipation efficiency.
This improved the heat dissipation efficiency of the light source, reduced the coolant requirement, and enabled the module to be thinner and have more efficient heat dissipation.
Smart Images
Figure CN223782807U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of lighting fixtures, and more specifically, to a light-emitting module and a lighting fixture. Background Technology
[0002] COB (Chip-on-Board) light-emitting modules are high-efficiency integrated surface light source technologies that directly mount LED chips onto a highly reflective mirror metal substrate. This technology eliminates the concept of a bracket, and eliminates electroplating, reflow soldering, and surface mount processes, thus reducing the number of processes by nearly one-third and saving one-third of the cost. It has advantages such as simple installation, convenient use, reduced difficulty in lamp design, and savings in lamp processing and subsequent maintenance costs.
[0003] As the fourth generation of lighting source, LED has the characteristics of high luminous efficacy, long life, fast response and environmental protection. However, it still faces many technical challenges in completely replacing traditional light sources. Among them, heat dissipation is an important factor that restricts the development of LED lighting fixtures.
[0004] LEDs are solid-state semiconductor devices that directly convert electricity into light. LEDs possess numerous advantages, including small size, low power consumption, long lifespan, high brightness, low heat generation, environmental friendliness, and durability. These advantages make LED light sources significantly superior to traditional light sources, leading to their widespread use. However, low heat generation is relative. Considering current photoelectric conversion efficiency, when applied to lighting, the small surface area of the LED chip results in a high current density during operation, leading to high heat generation. Increased junction temperature reduces light output, accelerates chip degradation, and shortens device lifespan. Furthermore, LEDs drift towards longer wavelengths as junction temperature rises. To account for the adverse effects of color shift in practical applications, thermal design must limit the maximum junction temperature.
[0005] However, in order to improve the heat dissipation performance of COB light-emitting modules, liquid cooling devices are added to improve heat dissipation performance. However, the large size of liquid cooling devices can easily increase the thickness of COB light-emitting modules. Therefore, existing COB light-emitting modules are difficult to balance heat dissipation performance and thinness. Utility Model Content
[0006] The purpose of this utility model is to provide a light-emitting module and lighting fixture to solve the technical problem that existing light-emitting modules are difficult to balance heat dissipation performance and thinness.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] Firstly, a light-emitting module is provided, comprising:
[0009] A housing, a light source disposed inside the housing, and a cover disposed on the housing;
[0010] The housing and the cover form a cavity. The housing is provided with an inlet pipe that communicates with the cavity and allows coolant to enter, and an outlet pipe that communicates with the cavity and allows coolant to exit. The light source is housed in the cavity and divides the cavity into a first heat dissipation cavity and a second heat dissipation cavity that communicate with each other. The first heat dissipation cavity is connected to the inlet pipe, and the second heat dissipation cavity is connected to the outlet pipe. The bottom of the light source is provided with a heat dissipation component and is housed in the first heat dissipation cavity, and the top of the light source is housed in the second heat dissipation cavity.
[0011] By adopting the above technical solution, the light source divides the housing cavity into a first heat dissipation cavity and a second heat dissipation cavity. Coolant enters the first heat dissipation cavity and the second heat dissipation cavity to dissipate heat from the bottom and top of the light source, thereby improving the heat dissipation efficiency of the light source. At the same time, the coolant is located at the top and bottom of the light source respectively, which increases the total contact area with the light source, reduces the demand for coolant, and thus reduces the volume requirement of the first heat dissipation cavity and the second heat dissipation cavity, thereby making the entire light-emitting module thinner.
[0012] In one embodiment, the inlet pipe is defined with an inlet direction, and the coolant moves in the inlet pipe along the inlet direction; the heat dissipation component includes a plurality of heat dissipation units arranged sequentially at intervals along the inlet direction, and a heat dissipation groove communicating with the first heat dissipation cavity is formed between two adjacent heat dissipation units.
[0013] By adopting the above technical solution, the heat sink includes multiple heat dissipation units, which increases the heat dissipation area of the heat sink. At the same time, the cooling liquid enters multiple heat dissipation slots in sequence to dissipate heat from the heat dissipation units, thereby improving the heat dissipation efficiency.
[0014] In one embodiment, the length direction of the heat dissipation unit is perpendicular to the liquid inlet direction, such that the length direction of the heat dissipation groove is perpendicular to the liquid inlet direction.
[0015] By adopting the above technical solution, the length direction of each heat dissipation groove is perpendicular to the liquid inlet direction. This allows the coverage area of multiple heat dissipation grooves to be increased, thereby improving the heat dissipation efficiency of the heat dissipation unit.
[0016] In one embodiment, each of the heat dissipation slots has a bottom slot opening and a side slot opening communicating with the interior of the heat dissipation slot, the liquid inlet pipe is provided with a liquid inlet opening communicating with a plurality of the bottom slot openings, and the side slot openings are communicating with the second heat dissipation cavity.
[0017] By adopting the above technical solution, the flow direction of the cooling liquid in the heat dissipation tank is conducive to the heat of the heat dissipation unit being carried away by the cooling liquid.
[0018] In one embodiment, each of the heat dissipation slots has two opposing side slots, with the bottom slot located between the two side slots.
[0019] By adopting the above technical solution, the flow path of the coolant is shortened, and the heat dissipation efficiency is improved.
[0020] In one embodiment, the liquid inlet is located on the line connecting the midpoints of the two side slots.
[0021] By adopting the above technical solution, the coolant flows along the same path from the bottom slot to the two side slots in the heat dissipation tank, which helps to improve the uniformity of heat dissipation.
[0022] In one embodiment, a first communicating cavity is formed between the two ends of the heat sink and the housing, connecting the first heat sink cavity and the second heat sink cavity; the first communicating cavity is connected to the side slot.
[0023] By adopting the above technical solution, it is beneficial for the coolant to flow from multiple side slots to the first connecting cavity.
[0024] In one embodiment, the housing is further provided with a barrier, which, together with the light source, divides the accommodating cavity into a first heat dissipation cavity, a second heat dissipation cavity, and a second connecting cavity that connects the second heat dissipation cavity and the liquid outlet pipe.
[0025] By adopting the above technical solution, the coolant flows in a predetermined direction, which helps to improve heat dissipation efficiency.
[0026] In one embodiment, the length of the second communicating cavity matches the length of the heat dissipation unit.
[0027] By adopting the above technical solution, the efficiency of the coolant flowing from the second heat dissipation cavity to the second connecting cavity is improved.
[0028] Secondly, a lighting fixture is provided, including a fixture body and the aforementioned light-emitting module, wherein the light-emitting module is disposed on the fixture body.
[0029] By adopting the above technical solution, the lighting fixture of this embodiment has the advantage of miniaturization, in addition to the advantages of the light-emitting module of the above embodiment. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a three-dimensional structural diagram of the light-emitting module provided in an embodiment of this utility model.
[0032] Figure 2 This is an exploded view of the light-emitting module provided in an embodiment of this utility model.
[0033] Figure 3 This is an exploded view of the light-emitting module provided in this embodiment of the utility model.
[0034] Figure 4 This is a cross-sectional view of the light-emitting module provided in an embodiment of this utility model.
[0035] Figure 5 yes Figure 3 Enlarged view of section "A" in the image.
[0036] The labels for the attached figures are as follows:
[0037] 1. Housing; 2. Light source; 3. Cover; 4. Heat sink; X, liquid inlet direction;
[0038] 11. Receptacle; 12. Liquid inlet pipe; 13. Liquid outlet pipe; 41. Heat dissipation unit; 42. Heat dissipation groove; 43. First connecting cavity; 14. Barrier component; 15. Second connecting cavity;
[0039] 111, First heat dissipation cavity; 112, Second heat dissipation cavity; 421, Bottom groove opening; 422, Side groove opening; 121, Liquid inlet opening. Detailed Implementation
[0040] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0041] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.
[0042] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this utility model is described in more detail below with reference to specific embodiments:
[0044] like Figure 1 and Figure 2 As shown in the figure, this utility model provides a light-emitting module, which includes, but is not limited to, a COB light-emitting module. The light-emitting module provided in this embodiment dissipates heat through a liquid cooling solution, and the contact area between the coolant and the light source 2 is large, resulting in high heat dissipation efficiency. The following is a detailed description of the specific implementation method:
[0045] Please refer to the following: Figure 3 and Figure 4 The light-emitting module in this embodiment includes:
[0046] Housing 1, light source 2 disposed inside housing 1, and cover 3 disposed on housing 1;
[0047] The housing 1 and the cover 3 form a cavity 11. The housing 1 is provided with an inlet pipe 12 that communicates with the cavity 11 and allows coolant to enter, and an outlet pipe 13 that communicates with the cavity 11 and allows coolant to exit. The light source 2 is housed in the cavity 11. The light source 2 divides the cavity 11 into a first heat dissipation cavity 111 and a second heat dissipation cavity 112 that are interconnected. The first heat dissipation cavity 111 is connected to the inlet pipe 12, and the second heat dissipation cavity 112 is connected to the outlet pipe 13. The bottom of the light source 2 is provided with a heat dissipation component 4 and is housed in the first heat dissipation cavity 111. The top of the light source 2 is housed in the second heat dissipation cavity 112.
[0048] Here, it can be understood that the housing 1 refers to the component used to fix the light source 2; the housing 1 has a receiving cavity 11, the shape and size of which match the shape and size of the light source 2 and the heat sink 4, so that the light source 2 and the heat sink 4 can be placed into the receiving cavity 11; the receiving cavity 11 is formed between the cover 3 and the housing 1, and the housing 1 is provided with a liquid inlet pipe 12, which supplies coolant to enter. The liquid inlet pipe 12 is connected to the receiving cavity 11, that is, the coolant can enter the receiving cavity 11 from the liquid inlet pipe 12; at the same time, the liquid outlet pipe 13 is connected to the receiving cavity 11, that is, the coolant in the receiving cavity 11 can be discharged from the liquid outlet pipe 13;
[0049] Light source 2 refers to a component capable of emitting light; in this embodiment, light source 2 includes, but is not limited to, an LED chip; light source 2 is housed in a housing cavity 11, which is used to divide the housing cavity 11 into a first heat dissipation cavity 111 and a second heat dissipation cavity 112. The first heat dissipation cavity 111 and the second heat dissipation cavity 112 are interconnected. The first heat dissipation cavity 111 is connected to the liquid inlet pipe 12, that is, the cooling liquid enters the first heat dissipation cavity 111 from the liquid inlet pipe 12. The second heat dissipation cavity 112 is connected to the liquid outlet pipe 13, that is, the cooling liquid in the second heat dissipation cavity 112 is discharged from the liquid outlet pipe 13; a heat dissipation component 4 is provided at the bottom of light source 2. The heat dissipation component 4 refers to a component used to dissipate heat from light source 2, and the heat dissipation component 4 includes, but is not limited to, heat dissipation fins; the heat dissipation component 4 is directly disposed at the bottom of light source 2, housed in the first heat dissipation cavity 111 and immersed in the coolant, and the top of light source 2 is housed in the second heat dissipation cavity 112 and immersed in the coolant.
[0050] The heat dissipation principle of the light-emitting module provided in this embodiment is as follows:
[0051] Coolant enters the first heat dissipation chamber 111 from the inlet pipe 12. The coolant dissipates heat from the bottom of the heat sink 4 and the light source 2. The coolant continues to flow from the first heat dissipation chamber 111 to the second heat dissipation chamber 112. The coolant dissipates heat from the top of the light source 2. Finally, the coolant is discharged from the outlet pipe 13.
[0052] It needs to be further explained that the temperature at the bottom of the light source 2 is higher than the temperature at the top of the light source 2. Therefore, a heat sink 4 is provided at the bottom of the light source 2. At the same time, the coolant first enters the first heat sink 111 to dissipate heat from the bottom of the light source 2 and the heat sink 4. Then, the coolant with the increased temperature flows from the first heat sink 111 to the second heat sink 112 to dissipate heat from the top of the light source 2, thereby achieving overall heat dissipation of the light source 2.
[0053] By adopting the above technical solution, the light source 2 divides the accommodating cavity 11 into a first heat dissipation cavity 111 and a second heat dissipation cavity 112. The coolant enters the first heat dissipation cavity 111 and the second heat dissipation cavity 112 to dissipate heat from the bottom and top of the light source 2, thereby improving the heat dissipation efficiency of the light source 2. At the same time, the coolant is located at the top and bottom of the light source 2 respectively, which increases the total contact area with the light source 2, thereby reducing the demand for coolant and thus reducing the volume requirements of the first heat dissipation cavity 111 and the second heat dissipation cavity 112, thereby making the entire light-emitting module thinner.
[0054] Please refer to the following: Figure 5 In one embodiment, the liquid inlet pipe 12 is defined with a liquid inlet direction X, and the coolant moves in the liquid inlet pipe 12 along the liquid inlet direction X; the heat sink 4 includes a plurality of heat sink units 41 arranged sequentially at intervals along the liquid inlet direction X, and a heat sink groove 42 communicating with the first heat sink cavity 111 is formed between two adjacent heat sink units 41.
[0055] Here, it can be understood that the liquid inlet direction X refers to the direction of liquid flow. The liquid inlet pipe 12 is defined with a liquid inlet direction X, that is, the coolant flows in the liquid inlet pipe 12 along the liquid inlet direction X; the heat dissipation component 4 includes a plurality of heat dissipation units 41, which are arranged sequentially and spaced apart along the liquid inlet direction X, that is, two adjacent heat dissipation units 41 are spaced apart and a heat dissipation groove 42 is formed between them, and the heat dissipation groove 42 formed by the plurality of heat dissipation units 41 is arranged sequentially along the liquid inlet direction X, and each heat dissipation groove 42 is connected to the first heat dissipation cavity 111.
[0056] The working principle of the light-emitting module provided in this embodiment is as follows:
[0057] Cooling liquid flows along the inlet direction X and enters the first heat dissipation chamber 111. Since each heat dissipation slot 42 is connected to the first heat dissipation chamber 111, the cooling liquid flows into the heat dissipation slot 42 one by one, thereby achieving heat dissipation for each heat dissipation unit 41.
[0058] By adopting the above technical solution, the heat sink 4 includes multiple heat dissipation units 41, which increases the heat dissipation area of the heat sink 4. At the same time, the cooling liquid enters multiple heat dissipation slots 42 in sequence to dissipate heat from the heat dissipation units 41, thereby improving the heat dissipation efficiency.
[0059] In one embodiment, the length direction of the heat dissipation unit 41 is perpendicular to the liquid inlet direction X, such that the length direction of the heat dissipation groove 42 is perpendicular to the liquid inlet direction X.
[0060] Here, it can be understood that the coolant flows along the length of the heat sink 42.
[0061] By adopting the above technical solution, the length direction of each heat dissipation groove 42 is perpendicular to the liquid inlet direction X. In this way, the coverage area of multiple heat dissipation grooves 42 can be increased, thereby improving the heat dissipation efficiency of the heat dissipation unit 41.
[0062] In one embodiment, each heat sink 42 has a bottom slot 421 and a side slot 422 communicating with the interior of the heat sink 42, and the liquid inlet pipe 12 is provided with a liquid inlet opening 121 communicating with a plurality of bottom slots 421, and the side slot 422 communicating with the second heat sink cavity 112.
[0063] Here, it can be understood that the heat sink 42 has a bottom slot 421 and a side slot 422. The bottom slot 421 and the side slot 422 are connected to the interior of the heat sink 42. The coolant flows from the inlet opening 121 of the inlet pipe 12 to the bottom slot 421 of each heat sink 42, then from the bottom slot 421 of each heat sink 42 to the side slot 422, and finally from the side slot 422 to the second heat sink cavity 112.
[0064] By adopting the above technical solution, the flow direction of the cooling liquid in the heat dissipation tank 42 is conducive to the heat dissipation unit 41 being carried away by the cooling liquid.
[0065] In one embodiment, each heat sink 42 has two opposing side slots 422, and a bottom slot 421 is located between the two side slots 422.
[0066] Here, it can be understood that the cooling liquid flowing from the liquid inlet 121 to the heat dissipation tank 42 flows from the bottom tank opening 421 to the side tank openings 422 on both sides. This shortens the path of the cooling liquid to the second heat dissipation chamber 112, allowing the cooling liquid to reach the second heat dissipation chamber 112 faster, which helps to improve heat dissipation efficiency.
[0067] By adopting the above technical solution, the flow path of the coolant is shortened, and the heat dissipation efficiency is improved.
[0068] In one embodiment, the liquid inlet 121 is located on the line connecting the midpoints of the two side slots 422.
[0069] Here, it can be understood that the line connecting the midpoints of the two side slots 422 refers to the middle part of the heat sink 42, that is, the liquid inlet opening 121 is located in the middle part of the heat sink 4 and extends along the liquid inlet direction X.
[0070] By adopting the above technical solution, the coolant flows along the same path from the bottom slot 421 to the two side slots 422 in the heat dissipation tank 42, which helps to improve the uniformity of heat dissipation.
[0071] In one embodiment, a first connecting cavity 43 is formed between the two ends of the heat sink 4 and the housing 1, connecting the first heat sink 111 and the second heat sink 112; the first connecting cavity 43 is connected to the side slot 422.
[0072] Here, it can be understood that the first connecting cavity 43 refers to the cavity used for the first heat dissipation cavity 111 and the side slot 422, thereby enabling the first heat dissipation cavity 111 to communicate with the second heat dissipation cavity 112.
[0073] It needs to be further explained that the length of the first connecting cavity 43 matches the dimension in the thickness direction of the multiple heat dissipation units 41, so that the multiple side slots 422 can communicate with the first connecting cavity 43.
[0074] By adopting the above technical solution, it is beneficial for the coolant to flow from multiple side slots 422 to the first connecting cavity 43.
[0075] In one embodiment, the housing 1 is further provided with a barrier 14, which together with the light source 2 divides the accommodating cavity 11 into a first heat dissipation cavity 111, a second heat dissipation cavity 112, and a second connecting cavity 15 that connects the second heat dissipation cavity 112 and the liquid outlet pipe 13.
[0076] Here, it can be understood that the barrier 14 refers to the component used to separate the accommodating cavity 11 together with the light source 2, so that the accommodating cavity 11 is divided into a first heat dissipation cavity 111, a second heat dissipation cavity 112 and a second connecting cavity 15, and the second connecting cavity 15 connects the second heat dissipation cavity 112 and the liquid outlet pipe 13.
[0077] By adopting the above technical solution, the coolant flows in a predetermined direction, which helps to improve heat dissipation efficiency.
[0078] In one embodiment, the length of the second connecting cavity 15 matches the length of the heat dissipation unit 41.
[0079] By adopting the above technical solution, the efficiency of the coolant flowing from the second heat dissipation cavity 112 to the second connecting cavity 15 is improved.
[0080] Secondly, a lighting fixture is provided, including a fixture body and the aforementioned light-emitting module, wherein the light-emitting module is disposed on the fixture body.
[0081] By adopting the above technical solution, the lighting fixture of this embodiment has the advantage of miniaturization, in addition to the advantages of the light-emitting module of the above embodiment.
[0082] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A light-emitting module, characterized in that, include: A housing (1), a light source (2) disposed inside the housing (1), and a cover (3) covering the housing (1); The housing (1) and the cover (3) form a cavity (11). The housing (1) is provided with an inlet pipe (12) that communicates with the cavity (11) and allows coolant to enter, and an outlet pipe (13) that communicates with the cavity (11) and allows coolant to exit. The light source (2) is housed in the cavity (11). The light source (2) divides the cavity (11) into a first heat dissipation cavity (111) and a second heat dissipation cavity (112) that communicate with each other. The first heat dissipation cavity (111) communicates with the inlet pipe (12), and the second heat dissipation cavity (112) communicates with the outlet pipe (13). The bottom of the light source (2) is provided with a heat dissipation component (4) and is housed in the first heat dissipation cavity (111). The top of the light source (2) is housed in the second heat dissipation cavity (112).
2. The light-emitting module as described in claim 1, characterized in that, The liquid inlet pipe (12) is defined with a liquid inlet direction X, and the coolant moves in the liquid inlet pipe (12) along the liquid inlet direction X; the heat dissipation component (4) includes a plurality of heat dissipation units (41) arranged sequentially at intervals along the liquid inlet direction X, and a heat dissipation groove (42) communicating with the first heat dissipation cavity (111) is formed between two adjacent heat dissipation units (41).
3. The light-emitting module as described in claim 2, characterized in that, The length direction of the heat dissipation unit (41) is perpendicular to the liquid inlet direction X, so that the length direction of the heat dissipation groove (42) is perpendicular to the liquid inlet direction X.
4. The light-emitting module as described in claim 3, characterized in that, Each of the heat dissipation slots (42) has a bottom slot opening (421) and a side slot opening (422) communicating with the interior of the heat dissipation slot (42). The liquid inlet pipe (12) is provided with a liquid inlet opening (121) communicating with the plurality of bottom slot openings (421). The side slot opening (422) is communicating with the second heat dissipation cavity (112).
5. The light-emitting module as described in claim 4, characterized in that, Each of the heat dissipation slots (42) has two opposing side slots (422), and the bottom slot (421) is located between the two side slots (422).
6. The light-emitting module as described in claim 5, characterized in that, The liquid inlet (121) is located on the line connecting the midpoints of the two side slots (422).
7. The light-emitting module as described in claim 4, characterized in that, The heat sink (4) has a first connecting cavity (43) between its two ends and the housing (1) that connects the first heat sink cavity (111) and the second heat sink cavity (112); the first connecting cavity (43) is connected to the side slot (422).
8. The light-emitting module as described in claim 4, characterized in that, The housing (1) is further provided with a barrier (14), which together with the light source (2) divides the accommodating cavity (11) into a first heat dissipation cavity (111), a second heat dissipation cavity (112), and a second connecting cavity (15) that connects the second heat dissipation cavity (112) and the liquid outlet pipe (13).
9. The light-emitting module as described in claim 8, characterized in that, The length of the second connecting cavity (15) matches the length of the heat dissipation unit (41).
10. A lighting fixture, characterized in that, It includes a lamp body and a light-emitting module as described in any one of claims 1 to 9, wherein the light-emitting module is disposed on the lamp body.