Light-emitting diode (LED) lamp

Abstract

The invention relates to a light-emitting diode (LED) lamp, which comprises a radiating part, an optical part and an electrical part, wherein the radiating part comprises a heat exchanging loop device and a communicating pipe radiator arranged on the top of the radiating part; a heat exchanging loop device is internally provided with a sealed first cavity, and a second cavity the top of which is open is formed on the top of the heat exchanging loop device; a capillary structure is distributed on the inner wall of the first cavity and is filled with working fluid; the first cavity is internally provided with a heat insulation piece; the communicating pipe radiator comprises at least one communicating pipe and a plurality of fins on the communicating pipe; the tops of natural heat exchanging loop devices at two ends of the communicating pipe are inserted into the first cavity and are communicated with the first cavity; the optical part comprises an LED light source arranged on the heat absorption surface at the bottom of the heat exchanging loop device; and the electrical part comprises a circuit board connected with the LED light source.

Description

technical field [0001] The invention relates to a light-emitting diode lamp, in particular to a light-emitting diode lamp with high heat dissipation efficiency. Background technique [0002] People's long-term over-reliance on fossil fuels not only causes energy shortages and high oil prices and hinders economic development, but also increases the concentration of global carbon dioxide and harmful gas emissions, leading to climate abnormalities caused by global warming, ecological environment damage, And the harm to human survival is becoming more and more obvious. In order to sustainably manage the earth's ecological environment on which human beings depend, it is necessary to solve the energy crisis and environmental pollution problems at the same time. The development of new energy and renewable energy is the most important way to promote energy conservation and efficient use of energy. strategy, while traditional lighting consumes a considerable amount of energy, the dev...

AI Technical Summary

Problems solved by technology

[0003] Because LED converts 80% to 90% of the input electric energy into heat, only 10% to 20% is converted into light energy, and because the LED chip area is small and the heat density is high, the key to the development of LED lighting must first solve the problem of heat dissipation; excellent The LED light cooling system can obtain lower working temperature under the same input power, prolong the service life of LED and improve light efficiency, or increase the input power or chip density within the same temperature limit range, thereby increasing the brightness of LED lights; Junction temperature is an important technical indicator to measure the heat dissipation performance of LED lamps. The rise in junction temperature due to poor heat dissipation will seriously affect the luminous wavelength, light intensity, light efficiency and service life

[0004] The application of high-power and high-brightness LEDs in the new light source of lighting must be combined with a high-efficiency heat dissipation mechanism to minimize the junction temperature of the LEDs in order to take advantage of the above advantages, otherwise the luminous brightness, lighting quality, and service life of the lighting device will be greatly reduced. , the impact will make the energy-saving effect of the lighting device not obvious, and directly impact the reliability of the lighting device, causing serious light decay and even making the lighting device invalid

[0005] Existing semiconductor lighting devices try to achieve the heat released when the light source emits light by increasing the heat dissipation area, which also causes the radiator to be overweight and small in size; for large semiconductor lighting devices with high output power, such as street lights , high-hanging wide-angle projection lamps, searchlights, etc., how to quickly and evenly transfer the heat to the heat dissipation area within the limited space and weight of the lighting device, and how to transfer the heat to the heat dissipation area The rapid removal of the heat has become an important indicator for reducing the junction temperature of the LED light source; therefore, it provides a light weight, long-term stability, no need for external power, and can automatically adjust the heat removal capacity with the change of the heating temperature and output power of the light source. The spontaneous high-efficiency heat removal device that quickly dissipates the heat of the light source has become a challenge for the semiconductor lighting industry to meet the all-round heat dissipation requirements of the lamps.

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