Solar water heater vacuum tube can be used to break the outer tube
1 inner glass tube used as water flowing pipe;2 copper oxide, black nickel, black chrome, black zinc, copper and other black solar selective absorbing coating is the outer surface by using vacuum deposition, sputtering and electrochemical process, evenly coated glass tube, used to absorb solar radiation;3 will be coated with a glass tube sealed in selective coating cover glass, then between the inner and outer glass tube vacuum to form a vacuum interlayer vacuum degree of 0.05Pa, in order to reduce the air convection and conduction caused by the heat loss, the principle and the thermos is similar
Solar water heater vacuum tube outer tube break can not be used.Will lead to internal pipe break the overall leakage.Solar water heater vacuum tube isThe whole structure of the glass vacuum tube from inside a glass tube, a solar selective absorbing coating, a vacuum interlayer, a cover glass pipe and a support member (spring clip), getter etc..
3 will be coated with a glass tube sealed in selective coating cover glass, then between the inner and outer glass tube vacuum to form a vacuum interlayer vacuum degree of 0.05Pa, in order to reduce the air convection and conduction caused by the heat loss, the principle and the thermos is similar;4 all glass vacuum tube using single end opening design, sealing ring up through the end of the inner tube and the outer tube, the inner tube is sealed at the other end of the hemispherical head, spring clip is used to the head supported on the cover glass tube inside end of the inner tube, the absorption of solar radiation and temperature rise, the formation of glass knob the free end of thermal expansion, and the buffer when the water heater works by vacuum tube open end of thermal stress;5 vacuum tube after being heated, the original is the adsorption of trace gases on the pipe wall (mainly water vapor) will be released, effect of vacuum getter and getter film is used to absorb the released gas, in order to maintain a high vacuum heat collecting tube
