Solar flat-board heat collector plate core and heat collection plate selective absorption membrane plating method

Abstract

The present invention provides a plate core of solar plate heat collector and a metallic-membrane plating method of collecting plate selectively absorbing film, the plate core is welded by a copper foil heat collecting plate and a copper fluid medium arranged on the reverse of the heat collecting plate, an absorbing film is arranged on the front of the heat collecting plate, the absorbing film TiNxOy is a selective absorbing film. The absorbing film has a reasonable structure, better heat exchanging effect and high absorptivity etc. The metallic-membrane plating method adopts direct double targets vacuum sputter coater, using copper foil as basic material, titanium target as cathode, treating the front of the copper foil heat collecting plate in turns; drying the copper foil heat collecting plate; dried copper foil heat collecting plate is placed in the film coating room being vacuumized; the method adopts Ar bombarding the front of the copper foil heat collecting plate, processing twice cleaning; connecting DC to titanium target, inflating N2, O2 at the same time, TiNxOy selectively absorbing film is formed after reaction. The method has an advanced process, even cladding material, an even plane and high absorptivity and low emissivity, the heat collecting plate and the selectively absorbing film are agglutinated powerfully.

Description

technical field [0001] The invention relates to a plate core of a solar plate heat collector and a film coating method for a selective absorption film of a heat collecting plate, belonging to the technology of solar heat exchange equipment. Background technique [0002] The so-called selective absorption film in the present invention refers to the TiN film that can effectively selectively absorb the incident energy of the sun, and its own thermal radiation is small. x o y Titanium oxynitride selective absorption membrane. [0003] Most of the plate core heat collecting plates of solar flat heat collectors in the prior art adopt TxT paint as its absorbing film, and its absorption rate can reach 92% at the highest, but its emissivity is as high as 30-40%. There is also the use of electroless chrome plating process to plate cloth absorbing film, but it has been stopped because of the pollution of the environment during the process. Although aluminum / nitride aluminum coating ...

AI Technical Summary

Problems solved by technology

And can effectively absorb the wavelength of solar radiation in the range of 30 ~ 250nm, for the high absorption and low emission titanium oxynitride selective absorption film and coating method of solar flat collector plate core heat collector plate, there is no report so far

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