JP3154837U - Heat dissipation fins for ceramic LED lighting fixtures - Google Patents

Abstract

A heat dissipating fin capable of effectively exhausting heat generated from the inside of an LED lighting apparatus is provided. A ceramic material has a heat conductivity lower than that of a metal material, but its heat radiation is about 10 to 20 times higher than that of a metal, and has an ability to radiate heat effectively. More effective heat radiation can be performed by combining the characteristics of this ceramic and the characteristics of aluminum. Specifically, by forming the ceramic thin film 4 on the surface of the aluminum fin 3, the ceramic can dissipate the heat that has been quickly transferred through the aluminum. As a result, internal heat generation can be effectively dissipated, so that the service life of the electronic components being used can be improved. [Selection] Figure 1

Description

  This is a technique for improving the heat dissipation characteristics of the heat dissipating fins so that heat generated from the inside of the LED lighting apparatus can be effectively exhausted.

  Ceramic materials are often used for substrates on which semiconductors are mounted due to their electrical insulation properties, and are often used in heat transfer circuits due to their heat resistance.

  As for the thermal characteristics of ceramic materials, there is the fact that the thermal conductivity is generally lower than that of metal materials, etc., but it is also well known that the spatial radiation, ie the emissivity, is 10 times that of metals. It is a fact.

  Usually, the thermal emissivity of many ceramic materials exceeds 0.9, compared with the thermal emissivity of metals, which is about 0.05-0.1. There are also materials.

  In order to smoothly drive the equipment, it may be necessary to effectively release the internal heat generation to the outside, and it is common practice to install a fan or use a heat dissipation fin That is.

  There are similar heat problems in LED lighting fixtures, such as heat generated during driving of the LED itself and heat generated from a converter circuit that converts a 100V or 200V AC power source to a 12V DC power source for LED driving. In order to effectively release the generated heat to the outside, a heat radiating plate or a heat radiating fin is installed on the back surface of the LED lighting fixture.

Means to solve the problem

  As mentioned above, in LED lighting fixtures, heat sinks or heat sink fins are installed from the viewpoint of ensuring the stability of the driving state and improving the life, but in most cases, aluminum is currently used, This needs to be a more effective structure.

  As described above, the thermal emissivity of a metal called aluminum is about 0.05 to 0.1, and although its thermal conductivity is high, it is a problem that it cannot effectively release the heat, which is solved. As a means to do so, it is possible to effectively carry out heat radiation by forming a ceramic thin film on the surface of the heat radiation fin made of aluminum for heat radiation.

  Specifically, a ceramic thin film is formed by applying and drying a ceramic paint on the surface of the heat radiation fin to be used, or a thin film is formed on the surface by vacuum deposition or sputtering. .

  By effectively combining the high heat conduction capability of the conventional aluminum with the high heat radiation performance of the ceramic, the overall heat dissipation can be effectively achieved. It becomes possible to carry out.

Effect of device

  The ceramic fins are used to paint the heat radiation fins of LED lighting fixtures to form a ceramic thin film with a thickness of about 10 microns. The surface temperature of the fins formed was 4.2-5.6 degrees lower than the surface temperature of the fins not formed.

  This temperature difference is considered to be a result of the effective release of internal heat by the thermal radioactivity possessed by the ceramic membrane itself, and its effectiveness can be confirmed.

  A ceramic paint with the product name Landex made by Dainichi Giken Kogyo Co., Ltd. is used for LED lighting fixtures, and the average curtain thickness is 10 using the spray method on the aluminum heat dissipating fin on the back of the 12W LED tube aimed at replacing the 40W fluorescent tube. When a micron ceramic film was formed and the heat dissipation characteristics were measured, it was confirmed that the surface temperature was reduced by 4.2 to 5.6 degrees as compared with an unpainted LED tube.

Sectional drawing of the LED lighting fixture implemented in the Example. 1. Light diffusion plate LED3. Radiation fins 4. Ceramic thin film

Claims (1)

  In order to effectively dissipate heat from the LED lighting fixtures, the ceramics film is formed on the surface of the radiator plate by a method such as ceramic coating or thin film formation technology, so that the heat dissipation performance is improved and the lighting fixtures themselves are used. The life of the LED lighting apparatus itself is improved by improving the life of the electronic component used by improving the life of the LED by lowering the temperature of the electronic component being lower than before. Heat radiation fin for ceramic LED lighting equipment.

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