For the heat dissipation of LED lamps, it is said that the temperature difference is large and the heat dissipation is large, so the surface temperature of the heat sink is high. This is true, it is not right. Why is there such an answer? The reason is because it cannot be generalized. In reality, the environment in which the lamps dissipate heat is diverse, and it is necessary to make a specific analysis according to the specific situation, and then it is determined whether the heat dissipation is really good. 
There are two reasons for heat dissipation. One is to transfer the heat of the heat source to the environment, and to heat the environment to raise the ambient temperature, such as a heating system; one is to transfer the heat of the heat source to transfer the heat of the heat source, so that the temperature of the heat source is reduced as much as possible. . For example, the heat dissipation of LEDs.
For heating systems, the surrounding environment needs to be heated to a sufficiently high temperature. Since the heat carrier in the heating pipe is flowing, the contact time of the fluid unit time with a certain pipe is limited. To transfer heat to the radiator as much as possible in a unit time, it is necessary to increase the temperature of the fluid, that is, a radiator is required. There is a large temperature difference between the air and the air. The price is that a large amount of energy is needed to heat the fluid at the far end of the heat, thereby increasing the temperature of the fluid to maintain the temperature of the heat sink, without lowering the temperature of the heat sink, and transferring a large amount of heat to the space environment per unit time. purpose. If the temperature at the heat sink end is insufficient, it is necessary to continuously increase the power at the heat source end to ensure.
The heat dissipation of LED products is different from the purpose of heat dissipation. The purpose of electronic heat dissipation is not to maintain the temperature of the heat sink, nor to heat the ambient temperature, but to reduce the temperature of the heat source. Because of the heat dissipation, the temperature of the LED can be lowered, and the LED product can work normally. Because the purpose is to be completely different from the heating system, the temperature of the radiator is naturally not high. For LED lamps and other products, good heat dissipation design, after heat balance, the temperature difference between the heat source and the heat sink is small, and the temperature difference between the heat sink and the space is also small.
Thermal design is actually a process of dialectical thinking. In the design process, the heat dissipation amount of the relevant formula that must not be viewed unilaterally is proportional to the temperature or temperature difference, and the temperature of the heat sink is increased based on this. When the heat source power is constant, to increase the temperature of the heat sink, it is necessary to reduce the size or radiation capability of the heat sink. However, the temperature of the radiator is increased, although the temperature difference between the radiator and the air is large, but the temperature difference between the heat source and the radiator is reduced, and the loss is lost. Moreover, the amount of heat dissipation is proportional to the effective area, which reduces the area of ​​heat dissipation and reduces the amount of heat dissipation. The result of this is that the temperature of the heat sink rises and the temperature of the heat source rises accordingly. This does not meet the original intention of LED thermal design.
Moreover, the temperature difference between the radiator and the air cannot be compared in general, and the principle of specific analysis of specific facts must still be adhered to. If the fins of the heat sink are very thin and high, heat is difficult to transfer to the top of the fins, and the temperature at the top is low. Although it appears that the temperature difference between the distal end of the heat sink and the heat source is actually large, the heat is not well transferred to the distal end of the heat sink. Such a large temperature difference, a small area, and a long distance heat path actually have a large thermal resistance, and the amount of heat transmitted to the distal end per unit time is small. All said the temperature of the radiator, we should pay attention to the temperature of the position on the radiator. Since the structure of the heat sink is different and the temperature on the heat sink is not uniform, it is difficult to say where the temperature of the heat sink can represent the temperature of the heat sink.
The thermal design of LED products is by no means a prerequisite for temperature differences. That is to say, at the beginning of the design, we are required to control the temperature of the heat source to a certain degree or less, and use this temperature as a precondition to develop the design of the heat dissipation system. Regardless of the final shape of the heat sink system, the result must be that the heat source temperature does not exceed a predetermined target. Compared to the heating system, it is necessary to keep the temperature of the heat source above a certain temperature. In the design, the radiator is often required to be small, and there are many factors in terms of heating design, such as users and energy saving.
Usually design LED cooling, can not only focus on a point, can not be one-sided only want a method, to comprehensive analysis, combined with various factors. The heat dissipation design is a system design, not only determined by a temperature or temperature difference parameter. For the heat dissipation of LED products, the concept of large temperature difference or high temperature can not be used to design the heat dissipation system, and the temperature of the heat sink cannot be used. Make a drop to determine if the radiator is good.
Win 3 Cap Lamps are made of high intensity engineering plastic. With optimized construction structure, the lamps are explosion proof, impact proof, water proof, dust proof, flame proof. The high quality Cree LED has a lifespan of more than 30,000 hours and the phosphate technology battery more than 1000 cycles.
3 color options to be customized, pure white color, cool white color, warm color.
2 lighting models available, primary light and auxiliary light.
Mining Lights,Led Mining Light,Coal Mining Lights,Rechargeable Mining Cap Lamps
ZHEJIANG HUACAI OPTIC-TECHNOLOGY CO LTD , https://www.win3safety.com