As a led advertising vehicle, its biggest advantage is to use huge screens, colorful colors to attract the attention of many passersby. At this time, the quality of the big screen led advertising car plays a crucial role, if its quality is excellent, then the color of the screen animation is gorgeous, playback is no problem. And if the screen quality of the led advertising car is not up to standard, the color of the broadcast will be biased, affecting the visual appreciation. How to observe the led advertising car screen and judge the quality? First, we first look at the surface of the led advertising car to see how smooth it is. If the screen appears convex or concave, it will cause the image to appear distorted. In order to ensure the vision, the flatness of Led's advertising screen cannot exceed one millimeter. Second, we can pay attention to the brightness of led advertising vehicles. If it is sometimes outdoors, and the brightness of the screen is not high enough, people will not be able to see the content on the screen, which will hinder the promotion of the product. According to the actual situation of indoor and outdoor to adjust the brightness of led advertising car. Third, we can pay attention to the color of led advertising vehicles. If the proportions of the three primary colors of red, green, and blue are not correct, then the white color displayed on the screen will be biased and appear yellowish green. At this time, it shows that the white balance effect of the led advertising car is not good. But also to observe its color, take a look at the led advertising car screen has not restored the color. Finally, we can pay attention to the image effect of led advertising. Pay attention to whether the led advertising car screen displays mosaic or black spots, or it is a case of color blocks. These are factors that hinder people's viewing and affect the viewing effect. We can determine the screen quality of led advertising car from the appearance of led advertising car, its brightness, its color, and its image effect. A screen with good quality can play colorful videos smoothly and unobstructedly, giving a visual enjoyment.
U-tube refers to a heat exchange tube shaped like a U, which is an important part of a U Type heat exchanger. Advantages of U-shaped tube: The U-shaped tube heat exchanger has only one tube plate, both ends of the tube are fixed on the same tube plate, the tube can be stretched freely, no thermal stress, and the thermal compensation performance is good; the tube side adopts double tube side, The process is longer, the flow rate is higher, the heat transfer performance is better, and the pressure bearing capacity is strong. The tube bundle can be drawn out from the shell, which is convenient for maintenance and cleaning, and the structure is simple and the cost is cheap. The disadvantage of the U-shaped tube is that due to the limitation of the radius of curvature of the bend tube, the arrangement of the heat exchange tubes is less, the innermost tube spacing of the tube bundle is relatively large, the utilization rate of the Tube Sheet is low, and the shell-side fluid is easy to form a short circuit, which is harmful to the transmission. When the tubes are leaked and damaged, only the U-shaped tubes at the periphery of the tube bundle are easy to replace. If the inner heat exchange tube is damaged, it cannot be replaced, but can only be blocked. Moreover, one damaged U-shaped tube is equivalent to two damaged tubes, and the scrap rate is relatively high.
U-tube,U Shaped Tube,Bundle Tubes,U Tube Bundle Guangdong Jiema Energy Saving Technology Co.,Ltd , https://www.heatexchangerjiema.com