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Solar heat absorbing film layer and preparation method of solar heat absorbing film layer and solar heat absorbing plate and preparation method of solar heat absorbing plate

A technology of heat-absorbing film and solar energy, which is applied in the field of solar energy conversion, and can solve problems such as fading, poor selectivity of the film layer, and affecting the emission ratio of the film layer.

Active Publication Date: 2018-06-15
RICHU DONGFANG SOLAR ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic coatings are generally used in the paint film on the market at present, because ordinary resin materials are used as the binder of the film layer, which will cause: 1. The surface of the film layer has poor stain resistance and weather resistance, and the appearance of film layer pulverization and fading, and organic matter has obvious absorption peaks in the far infrared region, which in turn affects the emissivity of the film layer; 2. Since ordinary black fillers are used as the absorber of the film layer, the choice of film layer Poor performance, which leads to high thermal emission ratio of the film layer

Method used

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Examples

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preparation example Construction

[0022] Some embodiments of the present invention also provide a method for preparing the above-mentioned solar heat absorbing film layer, which includes: coating a titanium dioxide sol doped with silicon dioxide on the absorbing layer, and curing to form an anti-reflective self-cleaning layer.

[0023] According to some embodiments, the absorbing layer is baked at a temperature of 250-300° C. for 3-5 minutes before coating. After baking at this temperature, the sol can be better combined with the surface of the absorbing layer, so that the performance of the anti-reflective self-cleaning layer is better.

[0024] According to some embodiments, the absorption layer is prepared by rolling or spraying the inorganic nano-ceramic coating prepared by the film former, the heat absorber and the first solvent in a weight ratio of 4-5:5-6:8-10 . In some embodiments, the film former, the heat absorber and the first solvent are mixed and ground for 4-5 hours to obtain the inorganic nano-...

Embodiment 1

[0054] Clean the aluminum substrate with a degreasing agent for 3 minutes, spray it with deionized water for 2 minutes, and dry the substrate at a temperature of 100°C; passivate the cleaned substrate with fluorozirconate, and the passivation layer The thickness is 100nm.

[0055] The film-forming material is inorganic nano-ceramic resin, and the heat-absorbing body is copper-cobalt-manganese composite oxide. The solvent is a mixed solvent composed of ethylene glycol monomethyl ether, ethanol, and isopropanol. According to the weight ratio of the film-former to the heat absorber and the solvent is 4:5:8, it is mixed and ground for 4 hours to obtain an inorganic nano-ceramic coating; Inorganic nano-ceramic coatings are sprayed on the passivation layer to continue to prepare an absorbing layer with solar spectrum selective heat absorption, with a wet film thickness of 30 microns; then bake at a high temperature of 250°C for 3 minutes to cure, and the cured The dry film thicknes...

Embodiment 2

[0059] Clean the aluminum substrate with a degreasing agent for 2 minutes, spray it with deionized water for 1 minute, and dry the substrate at a temperature of 80°C; passivate the cleaned substrate with fluorozirconate, and the passivation layer Thickness between 50nm.

[0060] The film-forming material is inorganic nano-ceramic resin, the heat-absorbing body is copper-manganese-nickel composite oxide, and the solvent is a mixed solvent composed of ethylene glycol monomethyl ether, ethanol, and isopropanol. According to the film-forming material, heat-absorbing body and solvent The weight ratio is 5:6:10 and mixed and ground for 5 hours to obtain the inorganic nano-ceramic coating; the inorganic nano-ceramic coating is rolled on the passivation layer to continue to prepare an absorbing layer with solar spectrum selective heat absorption, and the wet film thickness 50 microns; and then bake at a high temperature of 300° C. for 3 minutes to cure, and ensure that the dry film th...

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Abstract

The invention relates to the technical field of solar energy conversion, in particular to a solar heat absorbing film layer and a preparation method of the solar heat absorbing film layer and a solarheat absorbing plate and preparation method of the solar heat absorbing plate. The solar heat absorbing film layer comprises an absorbing layer and an anti-reflection self-cleaning layer arranged on the absorbing layer, the anti-reflection self-cleaning layer is formed by curing titanium dioxide sol mixed with silicon dioxide. The preparation method of the solar heat absorbing film layer comprisesthat a titanium dioxide sol mixed with silicon dioxide is coated on the absorbing layer; and the anti-reflection self-cleaning layer is formed by curing. The solar heat absorbing plate comprises a base material and the solar heat absorbing film layer arranged on the surface of the base material. The preparation method of the solar heat absorbing plate comprises the following steps that the absorbing layer is formed on the surface of a base material; and an anti-reflection self-cleaning layer is formed on the absorbing layer. According to the invention, the anti-reflection self-cleaning layerformed by curing titanium dioxide sol mixed with silicon dioxide is arranged on an absorbing layer, so that the solar heat absorbing film layer can have a high absorbing ratio and a low emission ratio, and also has good anti-fouling capability and weather resistance.

Description

technical field [0001] The invention relates to the technical field of solar energy conversion, in particular to a solar heat absorbing film layer and a preparation method thereof, a solar heat absorbing plate and a preparation method thereof. Background technique [0002] With the acceleration of the urbanization process, the perfect combination of solar panel collectors and the integration of solar wall collector panels and buildings has become more and more popular among consumers. As the core component of flat plate heat collector and solar wall heat collector, the solar absorbing film layer directly affects the use effect and life of the entire heat collector. At present, the coatings on the market mainly include coating coatings, electroplating coatings and magnetron sputtering coatings. However, organic coatings are generally used in the paint film on the market at present, because ordinary resin materials are used as the binder of the film layer, which will cause: 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24S70/10
CPCY02E10/40
Inventor 焦青太魏加杰胡张顺
Owner RICHU DONGFANG SOLAR ENERGY
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