Wall-mounted solar installations of solar water heaters Zhaotong early history emerged, primarily for wall-mounted solar water heaters, solar Zhaotong power plant, is mostly concentrating collectors, only a few uses flat plate collectors in the field of solar energy utilization low, flat plate collectors technical and economic performance of the collector than concentrating well, in order to improve efficiency, reduce costs, or to meet specific requirements, developed a wide variety of flat plate collectors. Divided by the working fluid and liquid air collector collector, is currently widely used special body collector; core material by absorbing plate divided into steel, iron pipes, copper, aluminum, copper and aluminum in line, stainless steel , plastic and other non-metallic collector, etc., according to the structure can be in charge of the plate, flat cassette, fin tube, finned heat pipe. Serpentine tube collectors, have yet to be flat and inverse mirror collectors flat plate collectors, etc., divided by a single layer or multi-layer cover glass, glass, steel or polymer transparent material, transparent insulation material collectors etc. At present, the domestic use of the more common is the all-copper and copper-aluminum collector conform collectors, copper and brass wings combined foreign generally use high-frequency welding, welding domestic media previously used, in order to reduce heat loss collector can be used hollow glass, polycarbonate and transparent solar panels and other cellular material as the cover. Wall-mounted solar water heaters Zhaotong