LED light fitting and light engine thereof

Abstract

The invention relates to an LED light fitting and a light engine thereof; the LED light fitting comprises an optical part, an electrical part and a heat dissipation part, wherein the optical part comprises an LED light source and a light-emitting channel; the electrical part comprises a protecting cover and a circuit board; the heat dissipation part comprises a radiator and at least one heat pipe which are arranged between the protecting cover and the optical part; the radiator comprises a ring-shaped radiating base, a plurality of fins which are distributed on the outer surface of the radiating base in a radial way, and a heat absorbing plate positioned on the radiating base close to one end of the optical part; the radiating base is internally provided with a cavity body provided with an opening towards one end of the protecting cover; the LED light source is in thermal contact with the outer surface of the heat absorbing plate facing the optical part; and the heat pipe is arranged inside the cavity body of the radiating base and comprises an evaporation section and a condensation section, wherein the evaporation section is in thermal contact with the inner surface of the heat absorbing plate facing the electrical part, and the condensation section is in thermal contact with the inner surface of the radiating base.

Description

technical field [0001] The invention relates to a semiconductor lighting device, in particular to a light emitting diode lamp and a light engine used therein. Background technique [0002] People's long-term over-reliance on fossil fuels not only causes energy shortages and high oil prices, which affects economic development, but also increases the concentration of global carbon dioxide and harmful gas emissions, leading to climate anomalies caused by global warming, ecological environment damage, and The harm to human existence 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 strategy to promote energy conservation and efficient use of energy , and the energy consumed by traditional lighting is extremely considerable, the dev...

AI Technical Summary

Problems solved by technology

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

[0005] Existing semiconductor lighting devices try to achieve the heat released when the light source emits light by opening a large heat dissipation area at the end of the fins in contact with the lower temperature air outside. The airflow channel and the heat conduction channel with low thermal resistance make it difficult to quickly and evenly transfer the heat to the heat dissipation area, and it is not easy to quickly remove the heat transferred to the heat dissipation area, so that the overall heat dissipation effect cannot be demonstrated , resulting in light decay and affecting the stability of lighting quality due to long-term high junction temperature

Images