Novel LED heat dissipating lamp shell for daily lighting and production method thereof

Abstract

The invention discloses a novel LED heat dissipating lamp shell for daily lighting and a production method thereof. The novel LED heat dissipating lamp shell comprises a plastic lamp shell, and the inner surface of the plastic lamp shell is coated with a carbon-based heat-conduction material layer. A carbon-based heat-conduction material of the carbon-based heat-conduction material layer is prepared through the following steps that a heat-conduction material, water and a substance A are taken and mixed to be added into a container to be mixed and stirred, and evenly-mixed viscous mixed liquidis obtained; and part of a solvent in the viscous mixed liquid is removed to enable the viscosity range to be within 1-5000 cP, and then the carbon-based heat-conduction material is obtained. According to the novel LED heat dissipating lamp shell, heat of a luminous LED chip can be effectively and rapidly transmitted to the whole plastic surface to achieve the extremely good heat dissipating effect so that an internally-arranged aluminum cup heat dissipating structure of a traditional LED lamp shell can be completely substituted, the cost is greatly reduced, and the unavoidable difficult problems of cracking of outer-layer plastics and the like which are caused by the thermal expansion coefficient difference between an inner-layer aluminum cup and the outer-layer plastics are solved.

Description

technical field [0001] The invention belongs to the technical field of LED heat dissipation, and in particular relates to a novel LED heat dissipation lamp housing for daily lighting and a production method thereof. Background technique [0002] As a new energy-saving light source product, LED has the advantages of energy saving and environmental protection, small size, friendly luminous color temperature, and long life, and has been widely used in various fields of production and life. The electro-optical conversion efficiency of white LED light sources is generally about 30%, and 70% of the energy is converted into heat energy. These heat energy have a huge side effect on the LED. If the heat cannot be effectively dissipated, the internal temperature of the LED will increase, resulting in a decrease in the luminous efficiency of the LED. It affects the life of the LED chip, so heat dissipation is the key to the application of high-power LEDs. The existing LED manufacturin...

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Problems solved by technology

At present, LED cooling devices are mainly made of aluminum alloy materials. Although aluminum alloy materials have advantages in heat conduction, the problems of aluminum alloy materials as heat sinks cannot be ignored, such as relatively high cost, complicated manufacturing process, and long production cycle. , Environmental pollution caused by electrolytic aluminum and its surface treatment process, cracking of the lamp housing caused by different thermal expansion coefficients when the temperature difference is too large, etc.

For example, the Chinese patent CN104595873A, the invention described in this patent is a one-piece stamped aluminum cup heat sink, although the contact surface and the heat dissipation surface are integrated, and the heat dissipation effect is good, but the electrolytic aluminum and aluminum forming process of the above patent are caused during the implementation process. Environmental pollution and energy waste cannot be ignored, and at the same time, it is faced with the fatal problem that the lamp housing cracks due to the difference in thermal expansion coefficient between the plastic lamp housing and the stamped aluminum cup; another example is the Chinese patent CN102130231 A. The invention described in this patent is an aluminum Fin-type LED radiators, although the above-mentioned patents have flexible design and good heat dissipation effect, their preparation process is complex and the production cycle is long; Chinese patent CN 103899991 A discloses a PAR56 for swimming pool water lighting using a graphene heat-conducting film - LED light bulbs, but the graphene heat-conducting film used in this patented method is attached to the outer surface of the bulb body, which has the following problems: (1) There are serious safety hazards. The graphene film on the outer surface of the cup is due to the graphene itself The high conductivity can easily lead to dangerous consequences such as electric leakage, and it is difficult to meet the safety standards of many LED lamp housing products. (2) Although graphene has a high thermal conductivity, placing the graphene thermal film on the outermost surface of the cup body and It cannot transfer the heat generated by the LED light board inside the cup body to the outside of the cup body as soon as possible, because the heat conduction path is LED light-emitting chip → lamp housing plastic and heat-conducting silicone sheet → graphene heat-conducting film → air, graphene heat-conducting film At the end of the heat conduction path of the entire cup, in this patented method, it plays more of a role of heat radiation rather than heat conduction, and the heat transfer generated by the LED light board is still largely restricted by the plastic in the heat conduction path (3) Since it is on the outermost surface of the cup, as a commodity, the appearance requirements such as flatness and color of the graphene thermal film on the outer surface must be considered. For example, LED bulbs for daily use are extremely It is rare to see an actual product with a black casing. (4) Since it is located on the outermost surface of the LED bulb, the requirements for the humidity resistance, anti-ultraviolet and other aging resistance of the graphene thermal film are also greatly increased. Therefore, the patented method The use of graphene thermal film is difficult to meet the safety standards of commonly used LED lamp products, and it is difficult to have practical commercial value due to inappropriate use

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