Pay attention to the suitability of choosing ppe

The development of domestic science and technology hardware is determined to a large extent by the demand of real estate in China, and now most of the marriage will choose to buy a new house to live alone, which will play a role in promoting the development of the furniture market and accelerate the pace of development of the industry. .

It is understood that there are more and more young people after the 80s who now have new houses. This part of the population is open-minded and does not stick to the selection of decorating materials. It is hoped that its own style will be different. In order to meet the market demand, many personalized decorative hardware products have been placed on the counter.

In the past, decorative hardware more emphasis on its mechanical properties, rust, moisture, life of moving parts. Today, decorative hardware is no longer suitable as a supporting role, ranging from door locks and door bumps to handles and hinges in cabinets, to towel racks in toilets, paper roll holders and coat hooks in living rooms. Different shapes, but still maintain the unity of artistic elements. In the hardware city market, it is not difficult to find a wide range of decorative hardware products that are elegant and fashionable.

According to Xie Mou, Nobel sanitary ware sales department, in the face of the ever-changing market, some professional hardware manufacturers will keep up with the trend of the times, and work hard at product design, rush to launch new products, constantly changing the face of products, to diversification, series The direction of development. Take the most common handles as an example, it has got rid of pure stainless steel, black, bronze, crystal clear and translucent, or dark, reserved, or elegant, these handles are full of expressive colors and become exquisite decoration. Hardware represents one of the products.

Shi Tao, owner of Botao Sanitary Ware Department, believes that the individual needs of consumers have prompted manufacturers to continue to develop products that are suitable for different levels of consumer preferences in order to win more consumers and win bigger markets.

High-power LED Lamp Beads

In the application process of high-power LED products and devices, heat dissipation, electrostatic protection, and welding have a great influence on their characteristics, and they need to be highly valued by application-side customers.

Heat dissipation

Due to the limitation of semiconductor light-emitting diode chip technology, the photoelectric conversion efficiency of LEDs needs to be improved, especially for high-power LEDs. Because of their higher power, about 60% of the electrical energy will be released as heat (with the development of semiconductor technology, The photoelectric conversion efficiency will gradually increase), which requires end customers to do a good job of heat dissipation when applying high-power LED products to ensure the normal operation of high-power LED products.

1. Heat sink requirements.

Appearance and material: If the sealing requirements of the finished product are not high, it can directly convection with the outside air environment. It is recommended to use finned aluminum or copper heat sinks.

2. Effective heat dissipation surface area:

For 1W high-power LED white light (other colors are basically the same), it is recommended that the total effective heat dissipation surface area of the heat sink is ≥50-60 square centimeters. For 3W products, it is recommended that the total effective heat dissipation surface area of the heat sink is ≥150 square centimeters. Higher power depends on the situation and test results. Try to ensure that the temperature of the heat sink does not exceed 60°C.

3. connection method:

When connecting the high-power LED substrate and the heat sink, please ensure that the two contact surfaces are flat and in good contact. In order to strengthen the combination of the two contact surfaces, it is recommended to coat the bottom of the LED substrate or the surface of the heat sink with a layer of thermal grease (thermal conductivity of thermal grease) ≥3.0W/mk), thermally conductive silicone grease shall be applied evenly and in an appropriate amount, and then fixed with screws.

welding

1. When soldering, please note that it is best to choose a constant temperature soldering iron, the soldering temperature is below 260℃, and the contact time between the soldering iron and the LED pad should not exceed 3S;

2. For high-power LEDs encapsulated by silicone, the maximum heat-resistant temperature of silicone is 180°C, so the soldering temperature of the LED should not exceed 170°C. Use low-temperature soldering iron and low-temperature solder paste (wire) for soldering, and the soldering iron is in contact with the LED pad at one time The time does not exceed 3S.

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Dongguan XIGE Electronics Co., Ltd. , https://www.gdxige.com