Several major factors about the fire protection effect of LED display
It is decided that the fire prevention effect of the LED display is directly related to the display fireproof material and the box process. The raw materials in the display include the wire, power supply, plastic kit and external protective aluminum composite panel. Wire: In most display applications, the larger the display per unit area of ​​the display, the higher the power consumption, and the higher the stability of the wire. Among the many wire products, the wire can meet the requirements of the national standard to ensure its safety and stability. There are three requirements: the wire core is a copper wire conductive carrier, the wire core cross-sectional area tolerance is within the standard range value, and the rubber core of the wrapped wire core is insulated. And the flame retardancy reaches the standard. Compared with the general copper clad aluminum wire core, the wire core cross-sectional area is small, and the insulation rubber grade is not enough, the electric current performance is more stable, and the short circuit condition is not easy to occur; Power supply: The UL-certified power supply product is also the best choice when selecting the same kind of products. Its effective conversion rate can ensure the safety and stability of the power supply load, and it can work normally even under the external environment temperature. Plastic kit: There is also an important part of the display fireproof raw material, that is, the plastic kit. The plastic kit is mainly used for the bottom cover of the unit module mask. The main raw material is PC+ glass fiber material with flame retardant function, which not only has flame retardant. The function can not be deformed at high and low temperature and long-term use, and will not become brittle and cracked. At the same time, it can be combined with the glue with better sealing performance, which can effectively block the rainwater from the external environment from penetrating into the interior and causing a short circuit to cause fire. Aluminum-plastic composite panel: In the material of the outer protective structure of the display screen, most of the display products with high fire-proof grade on the market adopt fire-resistant aluminum-plastic composite board, which has excellent fire resistance, fire retardant and strong flame retardant. Aging performance is also very strong, melting point temperature 135 ° C, decomposition temperature ≥ 300 ° C, environmental performance, low smoke and halogen free, in line with SGS, flame retardant B-S1, d0, t0, reference standard UL94, GB/8624-2006. The aluminum-plastic panel of the general outdoor display product aging rapidly with high temperature and rain and cold heat shock, so that the rain dew easily penetrates into the screen body during a relatively humid climate season, causing a short circuit of the electronic component to cause a fire; The outside of the display is configured and dissipated. When the display is working, the exhaust fan and air conditioner are configured to cool down the inside of the screen. It is recommended to install 1P air conditioner every 8-10 squares to ensure that the temperature inside the screen maintains normal temperature, air conditioning or exhaust fan configuration. If it is not in place, the heat treatment will be uneven, which may cause safety hazards inside the screen due to temperature increase. At the same time, many LED companies simply test the spray waterproof test in the external environment when testing the protection level of the cabinet. The durability and strength of the waterproof effect are yet to be verified, so that after the display product has been used for some time, Water seepage occurs, which is an important reason why outdoor displays are prone to fire or have a short service life. In response to thunderstorms, the screen device arrester is also an indispensable tool to avoid lightning strikes and burn out the internal components of the screen. It can directly direct lightning into the ground without affecting the screen. In addition, we can't ignore the human factors caused by the post-maintenance process. For example, in the follow-up maintenance work, the operators did not follow the strict process flow (the module screws are not tightened, the wire polarity is reversed, and the conductive objects are left behind after the operation). ), easy to cause a fire house.
Siren speaker is a kind of micro speaker unit which uses a diaphragm made of Mylar material. Mylar speakers are of ultrathin design and lightweight and clear voice. It is widely used in security industry (e.g. siren, alarm, smoke detector..).
There are two types of Mylar speakers from the shapes:
1) Round shapes, we have products from 10mm to 57mm in diameter.
2) Oblong shape, we have products in sizes of 1510/1712/1813-..
FAQ
Q1. What is the MOQ? Siren Speaker Siren Speaker,Alarm Speaker,Smoke Detector Speaker,Siren Horn Speaker Shenzhen Xuanda Electronics Co., Ltd. , https://www.xdecspeaker.com
XDEC: 2000pcs for one model.
Q2. What is the delivery lead time?
XDEC: 15 days for normal orders, 10 days for urgent orders.
Q3. What are the payment methods?
XDEC: T/T, PayPal, Western Union, Money Gram.
Q4. Can you offer samples for testing?
XDEC: Yes, we offer free samples.
Q5. How soon can you send samples?
XDEC: We can send samples in 3-5 days.