High-power LED lamp with pulsating heat pipe type honeycomb radiator and radiating method of high-power LED lamp

Abstract

The invention discloses a high-power LED lamp with a pulsating heat pipe type honeycomb radiator and a radiating method of the high-power LED lamp. The high-power LED lamp comprises an LED chip, a pulsating heat pipe component, a honeycomb radiating fin, a substrate and a filling pipe, wherein the pulsating heat pipe component is in plug-in connection with the honeycomb radiating fin to form a radiating component; the radiating component is fixed on the upper side of the substrate; the pulsating heat pipe component is a closed loop; the filling pipe communicates with the closed loop to fill the closed loop with a flowing working medium; and the LED chip is mounted on the lower side of the substrate. The high-power LED lamp has the advantages of large convective surface heat transfer coefficient, large heat flux, high radiating efficiency, long service life and high reliability, and can transfer heat at a large angle for a long distance in an opposite direction of gravity.

Description

technical field [0001] The invention relates to the field of heat dissipation of LED lamps, in particular to a high-power LED lamp of a pulsating heat pipe type honeycomb radiator and a heat dissipation method. Background technique [0002] As a new generation of solid-state energy-saving lighting sources, LEDs are gradually used in key lighting places such as factories, roads, and various venues due to their small size, low power consumption, long service life, and environmental protection. However, with the development of LEDs in the direction of high light intensity, high power, and high heat flux, the problem of heat dissipation becomes more and more prominent. [0003] At present, most of the LED lamps on the market adopt the heat dissipation method of the traditional heat pipe with fins. This method has the following disadvantages: [0004] Although the mainstream flat fins have a large heat transfer area, the surface convection coefficient of the fins is not high, wh...

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Problems solved by technology

[0004] Although the mainstream flat fins have a large heat transfer area, the surface convection coefficient of the fins is not high, which makes the thermal resistance ratio of the fins to the atmospheric environment very large.

At the same time, there are many disadvantages in the use of traditional heat pipes: First, the maximum transmission power of the heat transfer heat pipe is relatively small. Once the maximum transmission power is exceeded, the heat pipe will evaporate and the temperature of the heating end will rise sharply. If you want to obtain greater power, Just need to use the thicker heat pipe of diameter, make structure bulky, appearance is not attractive in appearance

However, the heat pipe works in a high-temperature environment for a long time, and it is inevitable to produce non-condensable gas. The existence of non-condensable gas greatly affects the normal operation of traditional heat pipes. As time goes by, the non-condensable gas increases, and the heat pipe eventually fails.

Finally, the state or placement of traditional heat pipes is greatly affected by gravity. No matter what type of traditional heat pipe is, it is difficult to transmit heat in the direction of gravity, or it can only transmit extremely small power over a small distance. Therefore, once Anti-gravity transmission, traditional heat pipes lose their meaning

At present, the method of using traditional heat pipes with heat sinks often makes the temperature of the lamp bead too high, which leads to LED light decay and short life, which seriously affects the wide-scale promotion and use of LEDs.

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