TWI384172B - Light emitting device - Google Patents

Description

Illuminating device

The invention is a light-emitting device, in particular a light-emitting device capable of dissipating heat.

Due to the rapid development of technology, the change of technology is changing with each passing day. The setting of lighting equipment is the indispensable equipment for modern people. With various lighting settings, it illuminates the darkness and brings light, making people more prone to night action.

Although the device of the illuminating device can bring light, but also causes high temperature and heat to be generated by the illuminating device due to long-time illumination, and severely, the illuminating device may be damaged. Therefore, people engaged in related fields will install heat-dissipating devices to eliminate high-temperature heat caused by long-time lighting.

However, due to the structural design, some of the heat dissipating devices installed on the illuminating device are not suitable for the outdoor environment, such as a fan-type radiator, and the reliability of the life is reduced. This design is not suitable for outdoor lighting fixtures. Another example is the heat dissipation technology of the loop heat pipe, which will not be competitive in the application of the product under the extremely high cost.

At present, the difficulty in heat dissipation technology lies in how to achieve the purpose of heat dissipation without using any moving parts, in other words, to enhance the performance of natural convection to achieve maximum heat dissipation efficiency. Therefore, how to improve the design of the illuminating device to improve the heat dissipation effect and meet the cost budget is an issue that the inventor of the present invention and the technical field engaged in the related industry desire to improve.

In view of the above, the present invention provides a light-emitting device for being disposed in an external environment, the light-emitting device comprising: a heat sink, a light-emitting element, and a first capillary structure; the light-emitting element is disposed on the heat sink; and the first capillary structure is disposed on the heat sink corresponding to the light-emitting element The first capillary structure is used to guide the fluid so that the fluid absorbs the heat of the light-emitting element and then evaporates the external environment.

Furthermore, the present invention further includes a water supply portion for accommodating a fluid; wherein the water supply portion is located on the heat sink, and the heat sink further comprises a fin extending from the heat sink; further, the first capillary structure is located on the surface of the fin, and the heat sink One end is located within the water supply portion such that the first capillary structure contacts the fluid.

Finally, the invention further comprises a connecting rod for connecting the heat sink and the water supply portion; the second capillary structure is located at the connecting rod for guiding the fluid to the first capillary structure.

The illuminating device of the invention guides the fluid by the capillary structure on the heat sink, makes the fluid contact with the heat sink, and takes away the heat of the heat sink when the fluid evaporates, thereby achieving the effect of heat dissipation, and avoiding the illuminating device Damaged by high temperatures.

The detailed features and advantages of the present invention are described in detail in the embodiments of the present invention. The objects and advantages associated with the present invention can be readily understood by those skilled in the art.

Referring to FIGS. 3 and 4, a perspective view of a first embodiment of the present invention includes a heat sink 10, a light-emitting element 20, and a first capillary structure 30.

The heat sink 10 has a generally rectangular structure and is mainly made of copper, aluminum or other materials having good thermal conductivity to dissipate heat. In addition, in the first embodiment, one side surface of the heat sink 10 extends to form a plurality of fins 11, as shown in FIG. 2, which is a partial component diagram of the second embodiment of the present invention, and the plurality of fins 11 are also It is made of a material with good thermal conductivity and is arranged at intervals.

The light emitting element 20 is located on one side surface of the heat sink 10 to provide bright illumination. When the light-emitting element 20 is in operation, the temperature is raised and heat is generated by the action of the light-emitting element 20, and the heat sink 10 is connected to the light-emitting element 20, so that the heat of the light-emitting element 20 can be transmitted to the heat sink 10, and the heat sink 10 is utilized. Large area and dissipate heat. Among them, the plurality of fins 11 increase the area where heat can be transferred, and the heat generated by the light-emitting element 20 is more effectively prevented from being excessively accumulated, thereby causing damage of burning. In addition, the light emitting element 20 is preferably an LED, but the invention is not limited thereto.

The first capillary structure 30 is disposed above the heat sink 10 and corresponds to the position of the light emitting element 20. The first capillary structure 30 is used to guide the fluid 40 onto the heat sink 10. However, the material of the first capillary structure 30 may be a powder sintered, mesh or grooved porous structure, but the present invention does not. In addition, it is also a porous structure in which a mixed powder is sintered, a mesh type, and a groove. The present invention further has a water supply portion 41 for containing the fluid 40. As shown in Fig. 4, the water supply portion 41 is preferably a substantially trough-shaped water tank located above the radiator 10 and containing the fluid 40 in the water supply portion 41. When the present invention is installed outdoors, the water supply portion 41 can be used to receive and contain rainwater when it is raining. The first capillary structure 30 is located on one side of the surface of the fin 11 respectively, and one end of the heat sink 10 is located in the water supply portion 41. Therefore, one end of the plurality of fins 11 is also located in the water supply portion 41, and is located in the fin 11 The first capillary structure 30 of the surface contacts the fluid 40 located within the water supply portion 41.

The light-emitting device of the present invention radiates heat of the light-emitting element 20 by the heat sink 10. In order to achieve a faster cooling effect, the water supply portion 41 is disposed on the heat sink 10 and accommodates the fluid 40, and then the fluid 40 is guided by the first capillary structure 30 covering the surface of the heat sink 10, so that the fluid 40 is extended first. The capillary structure 30 is transferred and overlaid on the heat sink 10. When the fluid 40 guided by the first capillary structure 30 is in contact with the heat sink 10, the low temperature contact of the fluid 40 is caused by the light emitting element 20 is transferred to the temperature of the heat sink 10, which in turn initiates evaporation of the fluid 40, and removes heat from the heat sink 10 as the fluid 40 evaporates, enhancing the heat dissipation effect of the heat sink 10. Since the heat sink 10 enhances the heat dissipation efficiency, the heat of the light-emitting element 20 can be more efficiently and quickly transferred to the heat sink 10, and the temperature of the light-emitting element 20 can be more effectively reduced.

Referring to Fig. 5, a perspective view of a second embodiment of the present invention is shown. The difference between this embodiment and the first embodiment is the position of the water supply portion 41. The second embodiment further has a connecting rod member 50 for connecting the heat sink 10 and the water supply portion 41, respectively. As shown in FIG. 1 , it is a partial component diagram of a second embodiment of the present invention. The heat sink 10 of the second embodiment has a substantially rectangular structure for radiating heat, and one side of the heat sink 10 is connected with light. The element 20, on the other side corresponding to the light-emitting element 20, is provided with a first capillary structure 30 and covers the surface of the heat sink 10. However, the water supply unit 41 described above is preferably a first-class water passage system, but the invention is not limited thereto.

Accordingly, the connecting rod 50 is a hollow elongated rod. The inner surface of the connecting rod 50 has a second capillary structure 31. The material of the second capillary structure 31 may preferably be a powder sintered, mesh or grooved porous structure, but the invention is not limited thereto, and may be Mixed powder sintered, mesh and grooved porous structure. One end of the second capillary structure 31 is in contact with the fluid 40 in the water supply portion 41, and the other end of the second capillary structure 31 is connected to the first capillary structure 30. The fluid 40 in the water supply portion 41 is guided by the second capillary structure 31, the connecting rod member 50 is transferred to the first capillary structure 30, and the first capillary structure 30 located on the surface of the heat sink 10 is used to extend the fluid 40. The capillary structure 30 continues to pass over and overlies the heat sink 10, and the fluid 40 is brought into contact with the high temperature heat sink 10 to remove heat, thereby reducing the temperature of the light emitting element 20. However, the arrangement of the second capillary structure 31 is only an example, and the second capillary structure 31 can be disposed on the outer surface of the connecting rod 50.

The invention guides the fluid to the surface of the heat sink via the capillary structure, and the heat generated by the light-emitting element when illuminating causes the fluid to evaporate via the heat sink, and the heat of the heat sink is effectively taken away by the evaporation of the fluid. Furthermore, the heat dissipation device for guiding the fluid by the capillary structure does not need to guide the fluid flow to the heat sink by the power driving method, and the manufacturing cost is low, and the energy cost required is also saved. In addition, when the invention is installed in an outdoor environment, it can use natural resources such as rainwater to dissipate heat, effectively achieve the purpose of environmental protection, and can effectively avoid the opportunity for the radiator to malfunction due to the harsh outdoor environment. In addition, the invention utilizes the fluid evaporation auxiliary radiator to cool down, and has better cooling and cooling effect.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any modifications and refinements made by those skilled in the art without departing from the spirit of the present invention are encompassed by the present invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

10. . . heat sink

11. . . Fin

20. . . Light-emitting element

30. . . First capillary structure

31. . . Second capillary structure

40. . . fluid

41. . . Water supply department

50. . . Connecting rod

Figure 1 is a partial diagram of a second embodiment of the present invention.

Figure 2 is a partial diagram of a first embodiment of the present invention.

Figure 3 is a perspective view of a first embodiment of the present invention.

Figure 4 is a perspective view of a first embodiment of the present invention.

Figure 5 is a perspective view of a second embodiment of the present invention.

20. . . Light-emitting element

30. . . First capillary structure

40. . . fluid

41. . . Water supply department

Claims (11)

An illuminating device is disposed in an external environment, comprising: a heat sink; a light emitting component disposed on the heat sink; and a first capillary structure, wherein the light emitting component is disposed on the heat sink, the first capillary structure is used for A fluid is directed such that the fluid absorbs heat from the light-emitting element and evaporates to the external environment. The illuminating device of claim 1, further comprising a water supply portion for accommodating the fluid. The illuminating device of claim 2, wherein the water supply portion is located on the heat sink. The illuminating device of claim 3, wherein the heat sink further comprises a fin formed by the heat sink extending. The illuminating device of claim 4, wherein one end of the fin is located within the water supply portion. The illuminating device of claim 4, wherein the first capillary structure is located on the surface of the fin. The illuminating device of claim 4, wherein one end of the heat sink is located in the water supply portion such that the first capillary structure contacts the fluid. The illuminating device of claim 4, wherein the fins are plural and arranged at intervals. The illuminating device of claim 2, further comprising a connecting rod for connecting the heat sink and the water supply portion. The illuminating device of claim 9, further comprising a second capillary structure located at the connecting rod for guiding the fluid to the first capillary structure. The illuminating device of claim 1, wherein the illuminating element comprises an LED.