Non-freezing hot water direct heating type natural circulation solar water heater

摘要

More particularly, the present invention relates to a header made of a copper or the like metal having a good thermal conductivity and an inner tube made of silicon rubber, polyurethane or polyethylene at a temperature of-20C-90C is equipped with a soft pressure reducing tube with proven heat resistance and elasticity within the solar heat utilization range, and the water inside the header and pipe compresses and decompresses the decompression tube, so that the header and pipe are frozen due to freezing in winter cold weather It is not only clean, but also can reduce the environmental pollution caused by the use of the heat medium such as antifreeze, and it is also necessary to install a separate heat exchange device in the heat storage tank to avoid the troubles It is much more economical and durable than conventional solar water heaters. There.;And a pipe (26) connecting the riser tube (10), the header (12), and the collector (14) of the collector (14) to the thermal storage tank (16).;A decompression tube 24 is inserted transversely to the inside center of the heat storage tank 16 and a decompression tube 24 is inserted inside the pipes 22 and 26 and the header 12 to separate the header 12 and the pipes 22, The pressure reducing tube 24 can be temporarily contracted to prevent the pipes 22 and 26 and the header 12 from being damaged even if the water passing through the pipes 26 and 26 is frozen due to the falling temperature. The pipe 102 connecting the collector and the heat storage tank is exposed to the outside but it is installed in the collector by the header portion 28 to prevent frozen water that is formed by the water inside the collector in the daytime to melt the water It is an all-weather solar water heater.