What should be paid attention to in the selection of heat-dissipating materials for outdoor LED lamps
What should be paid attention to in the selection of heat-dissipating materials for outdoor LED lamps: What should be paid attention to in the selection of heat-dissipating materials for outdoor LED lamps
Outdoor LED lamps should pay attention to the selection of heat dissipation materials. The outer casing and the heat sink are designed to be integrated to solve the heating problem of the LED. This method is better, generally aluminum or aluminum alloy, copper or copper alloy, and other alloys with good heat conductivity. The heat dissipation has air convection heat dissipation, strong wind cooling heat dissipation and heat pipe heat dissipation. (Jet cooling heat dissipation is also a kind of heat pipe cooling, but the structure is more complicated.
LED lamp radiator is a key component of LED lamp. Its shape, volume and heat dissipation surface area must be designed to be beneficial. The radiator is too small, the working temperature of LED lamp is too high, which affects luminous efficiency and life. Large, the consumption of materials increases product cost and weight, making the product competitive. It is important to design a suitable LED light radiator. The design of the heat sink has the following parts:
1. Identify the power that the LED lights need to dissipate heat.
2. Design some parameters for the heat sink: the specific heat of the metal, the thermal conductivity of the metal, the thermal resistance of the chip, the thermal resistance of the heat sink, and the thermal resistance of the surrounding air.
3. Determine the type of dispersion, (natural convection heat dissipation, strong wind cooling, heat pipe cooling, and other heat dissipation methods.) From the cost comparison: natural convection cooling lowest cost, strong wind cooling medium, heat pipe cooling cost is higher, jet cooling The highest cost.
4. Determine the maximum operating temperature allowed for the LED luminaire.
5. Calculate the volume and heat dissipation area of the heat sink. And determine the shape of the heat sink.
6. Combine the radiator and LED lamp into a complete luminaire, and work on it for more than eight hours. Check the temperature of the luminaire in the environment of room temperature 39 °C - 40 °C to see if the heat dissipation requirements are met to verify whether the calculation is correct, if not If the conditions of use are met, the parameters are recalculated and adjusted.
7. The seal of the radiator and the lampshade should be waterproof and dustproof. The rubber pad or silicone rubber pad should be padded against the aging between the lamp cover and the heat sink. It should be fastened with stainless steel bolts to make the seal waterproof and dustproof. Points to note, with reference to the latest outdoor lighting technical specifications promulgated by China, as well as urban road lighting design standards, this is the essential knowledge of outdoor lighting designers.
Due to the complicated working environment, ED outdoor lighting fixtures are affected by natural conditions such as temperature, ultraviolet light, humidity, rain, rain, sand, and chemical gases. Over time, the LED light is seriously degraded. The design of outdoor LED lighting fixtures is different from indoor lighting fixtures, and the technical requirements for heat dissipation are higher. Outdoor lighting designers must consider the working environment of outdoor LED lamps.
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Outdoor LED lamps should pay attention to the selection of heat dissipation materials. The outer casing and the heat sink are designed to be integrated to solve the heating problem of the LED. This method is better, generally aluminum or aluminum alloy, copper or copper alloy, and other alloys with good heat conductivity. The heat dissipation has air convection heat dissipation, strong wind cooling heat dissipation and heat pipe heat dissipation. (Jet cooling heat dissipation is also a kind of heat pipe cooling, but the structure is more complicated.
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LED lamp radiator is a key component of LED lamp. Its shape, volume and heat dissipation surface area must be designed to be beneficial. The radiator is too small, the working temperature of LED lamp is too high, which affects luminous efficiency and life. Large, the consumption of materials increases product cost and weight, making the product competitive. It is important to design a suitable LED light radiator. The design of the heat sink has the following parts:
1. Identify the power that the LED lights need to dissipate heat.
2. Design some parameters for the heat sink: the specific heat of the metal, the thermal conductivity of the metal, the thermal resistance of the chip, the thermal resistance of the heat sink, and the thermal resistance of the surrounding air.
3. Determine the type of dispersion, (natural convection heat dissipation, strong wind cooling, heat pipe cooling, and other heat dissipation methods.) From the cost comparison: natural convection cooling lowest cost, strong wind cooling medium, heat pipe cooling cost is higher, jet cooling The highest cost.
4. Determine the maximum operating temperature allowed for the LED luminaire.
5. Calculate the volume and heat dissipation area of the heat sink. And determine the shape of the heat sink.
6. Combine the radiator and LED lamp into a complete luminaire, and work on it for more than eight hours. Check the temperature of the luminaire in the environment of room temperature 39 °C - 40 °C to see if the heat dissipation requirements are met to verify whether the calculation is correct, if not If the conditions of use are met, the parameters are recalculated and adjusted.
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7. The seal of the radiator and the lampshade should be waterproof and dustproof. The rubber pad or silicone rubber pad should be padded against the aging between the lamp cover and the heat sink. It should be fastened with stainless steel bolts to make the seal waterproof and dustproof. Points to note, with reference to the latest outdoor lighting technical specifications promulgated by China, as well as urban road lighting design standards, this is the essential knowledge of outdoor lighting designers.
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