Standardization of radiator module to simplify high power lamp splicing

Aluminum matrix ceramic heat radiator stereo based on topological structure, is in the framework of three-dimensional radiating topology, in order to further enhance the efficiency and the development of new radiator, with independent intellectual property rights of the radiator, related patents have been made. Tape casting is one of the most effective methods for the preparation of large area and thin planar ceramic materials. It is characterized by low toxicity and low pollution. The porous Al2O3 ceramics with small aperture and through hole were prepared by multilayer low temperature casting method. In addition to the tape casting method, the method can be used to realize the aluminum matrix ceramic composite material by dry pressing, vacuum suction casting, micro arc oxidation, etc..

Based on aluminum matrix ceramic radiator heat dissipation structure based on the three-dimensional topology of low temperature casting prepared, applying the principle of structure function test of radiator thermal resistance and junction temperature, in the same condition the 60W radiator module performance by about 11%; the definition of standard stereo heat radiator module topology variety of power, the power source interface standard specification. The radiator module can be spliced to form larger modules, provides the basis for the manufacture and maintenance is simple and standardized, and does not affect the lamp shape, to be creative in the module on the basis of a different style shaped lamp.

Tape casting and micro arc oxidation

Aluminum matrix composite ceramics with high specific strength, specific stiffness, good wear resistance, originally derived from aerospace technology for the harsh requirements of materials technology. Generally, the aluminum matrix composite ceramic material has the characteristics of high temperature resistance, wear resistance, corrosion resistance and corrosion resistance.

Micro arc oxidation is one of the most widely used methods. Micro arc oxidation is a kind of method to deal with the material by using the plasma discharge from the surface of the liquid medium. The temperature of the plasma discharge channel can be up to 8000 DEG C, which can be analyzed by XRD and SEM. In the experiment, we prepared aluminum based composite ceramic radiator preparation, is used to obtain the best dispersion stability of alumina powder suspension, and then through ball milling, adding methyl cellulose and glycerol, longer time ball milling, and the milled ceramic slurry vacuum defoaming, thus obtained Al2O3 ceramic slurry. The ceramic slurry is cast on the low temperature cold zone, and the scraper gap is a thin layer, and a single layer casting sheet can be obtained. Freeze drying after a long time, high temperature sintering, heat preservation time, annealing furnace cooling to room temperature, you can get aluminum based porous alumina ceramics.

Higher heat dissipation efficiency

By the method of structure function, the thermal resistance curve can be obtained. Firstly, the voltage method, can be measured by light K coefficient is 13.386mv/K, 900J/Kg.K, ratio of material thermal conductivity specific heat capacity of aluminum materials for 6063 200W/ (m.K), and the thermal conductivity of alumina ceramic aluminum matrix ceramic radiator surface ratio was 25W/ (m.K), the specific heat capacity of 859 J/ Kg.K, thermal memory characteristics and aluminum based ceramic radiator has smaller, surface heat dissipation characteristics of porous ceramics, so the theory has better. Based on the above test data, we can know that the thermal resistance of aluminum based ceramic radiator is about 0.06 less than that of the 6063 aluminum material. It can be seen that at room temperature is about 25 DEG C under the condition of using 60W light under the same condition, the cooling efficiency of aluminum based ceramic radiator is higher, compared with the ordinary three-dimensional radiating radiator architecture efficiency can be raised about 11%.

Not only that, the aluminum based ceramic radiator as a result of the outer layer of Al2O3 ceramics, which makes the radiator more secure, more easily through the safety of the relevant test. The utility model has the advantages that the surface is not easy to corrode under the outdoor condition, thereby ensuring the long-term reliability of the lamp. In order to improve the adhesive viscosity of porous ceramics on the surface of aluminum based ceramics, Ren Zhongming and other methods were used to prepare porous aluminum based ceramic materials by dry pressing method. Similarly for the aluminum based ceramic radiator, it will also be used in harsh environments to consider further enhance its adhesion viscosity, which will be the focus of the next step.

The influence of the radiator and finally the overall thermal performance of different materials, the contact will be different, the following results based on TH3000K light source, the light source of the K coefficient is 13.79mv/K, when the heat conducting medium for thermal grease, cooling environment for cold plate, fixed by screws and the light paste on the cold plate test results show that:, for thermal grease, fastening force has little effect on the performance of heat dissipation, and the use of thermal grease when working under different light fastening force of the junction temperature also shows that in the light of work under two kinds of situations of the junction temperature difference. At the same time, we found that when the aluminum based flexible graphite sheet, the need for greater fastening force, otherwise it will make the thermal resistance of the thermal bonding layer increased significantly. For the same light source, the larger the thermal resistance means that the light source is operating at a higher node temperature, thus increasing the attenuation of the light source.

Modular assembly

The utility model can be assembled into a module radiator by a single radiating fin, and the standardization of the radiator module can also be realized, and the utility model can be spliced into a lamp with a higher power. Based on the modular design, as well as supporting the light source, standard lens, press plate, power supply, etc., can be achieved