The Chinese Market Is The All-glass Solar Water Heater Vacuum Collector Tube.

At present, the most common type in the Chinese market is the all-glass solar water heater vacuum collector tube. The structure is divided into outer tube and inner tube, and the outer wall of the inner tube is plated with selective absorption coating. The heat-collecting panel of the flat-plate collector is plated with black chromium and other heat-absorbing films, and the metal tube is welded on the heat-collecting plate. The cost of flat-plate collectors is slightly higher than that of evacuated tube collectors. In recent years, flat-plate collectors have shown an upward trend. , Especially in the balcony solar water heater of high-rise residential buildings has unique advantages. The all-glass solar water heater vacuum tube is generally made of high borosilicate 3.3 extra-hard glass, and the selective heat absorption film adopts the vacuum sputtering selective coating process.