Operating Principle:
Integral whole glass vacuum specification of solar water heater is that use vacuumed collecting-heat tubes absorbing-microcirculation-temperature holder box-measurement and control system-user. Vacuum tube is the core of the solar water heater, its structure is as a spin the inner tank of thermos, vacuum is between inside and outside layer. Inside the glass tube surface use of special process with the selective absorption spectrum coating, used to maximum absorb solar radiant energy. The sunshine illuminate, photon hit coating, the solar energy into heat energy, water from the absorption of coating, increased water temperatures, density decreases, and hot water to move up, and more than major of cold water drop. The light energy conversion to the hot water stored in the water heater can heat preservation of the water tank for the user of hot water use.