Straight through type vacuum solar energy thermal-collecting tube
A solar collector tube and straight-through technology, which is applied to solar collectors, solar collector safety, solar thermal energy, etc., can solve the problems of limited application range, inability to withstand higher temperatures, etc., to improve heat collection efficiency and use Effect of service life and buffering thermal expansion pressure
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[0009] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0010] As shown in Fig. 1 and Fig. 2, the present invention comprises a glass tube 1, a metal heat absorbing tube 2 is sheathed in the glass tube 1, and the two ends of the glass tube 1 are sealed together with the glass through a metal end cap 3 respectively, The outer surface of the metal heat-absorbing pipe 2 is coated with a solar selective heat-absorbing coating. A corrugated tube 4 is arranged at both ends of the gap between the glass tube 1 and the metal heat-absorbing tube 2, and the outer end of each corrugated tube 4 is welded into one body with the metal end cap 3 of the end through a transition ring 5, and each corrugated tube The inner end of the tube 4 is connected with a transition tube 6 , the transition tube 6 passes through the corrugated tube 4 , and the metal end cap 3 passing through the end is welded to the outer end of the metal...
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