Anti-frosting method with low energy consumption

A low energy consumption, anti-frosting technology, applied in micro-structure technology, micro-structure devices, manufacturing micro-structure devices, etc., can solve the problem of not mentioning the problem of anti-frost, and achieve the effect of delaying the spreading speed

Inactive Publication Date: 2015-11-04
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology only considers low-humidity environments, and does not mention the anti-frost problem in high-humidity (RH > 50%)...

Method used

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  • Anti-frosting method with low energy consumption
  • Anti-frosting method with low energy consumption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Clean and remove organic grease and inorganic impurities on the surface of the copper sheet.

[0025] (2) Take the mixed solution of cobalt chloride and urea as the reaction solution, immerse the copper sheet in it, and put it in a water bath at 60 °C for 11 h. Take it out, wash it and dry it, put it in an oven with 5 μL of fluorosilane and bake it at 120 °C for 2 hours, and then you can get a nanocone array structure surface with droplet self-dispelling and bouncing properties (hereinafter referred to as "nanostructure surface") .

[0026] (3) see figure 2 Shown is the comparison of frosting on the nanostructured surface and the blank copper sheet (ordinary smooth copper sheet) under the conditions of high humidity (relative humidity 60%, ambient temperature 23 ℃) and wall temperature -10 ℃. It can be seen that on the surface of the nanostructure, there are only a small amount of frost crystals at the edge at 30 minutes, and the frost crystals cover an area of ​...

Embodiment 2

[0029] (1) Clean and remove organic grease and inorganic impurities on the surface of the copper sheet.

[0030] (2) Take the mixed solution of cobalt chloride and urea as the reaction solution, immerse the copper piece in it, and put it in a water bath at 60 °C for 6~7 h. After taking it out for cleaning and drying, put it in an oven with 5 μL of fluorosilane and bake it at 120 °C for 2 h to obtain a nanoneedle array structure surface with droplet self-dispelling and bouncing properties.

Embodiment 3

[0032] (1) Clean and remove organic grease and inorganic impurities on the surface of the copper sheet.

[0033] (2) Take the mixed solution of zinc nitrate and sodium hydroxide as the reaction solution, immerse the copper piece in it, and put it in a water bath at 60 °C for 2 h. After taking it out, washing it and blowing it dry, put it in an oven with 5 μL of fluorosilane and bake it at 120 °C for 2 h to obtain a nanoflower structure surface with droplet self-dispelling and bouncing properties.

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Abstract

The invention discloses an anti-frosting method with low energy consumption. The anti-frosting method is characterized by comprising the following steps: forming a nanostructure on the surface of a substrate, and modifying a low surface energy substance, so as to obtain a micro-droplet self-release surface capable of delaying frost crystal formation and/or accelerating frost crystal melting, and then realizing a frost-free surface by combining with an auxiliary method with micro-energy consumption under low energy consumption. According to the anti-frosting method disclosed by the invention, by a chemical deposition method, an electrochemical corrosion method and the like, various nanostructures (such as nanocones, nanoneedles, nanoflowers and multi-scale nanostructures) are prepared on the substrate material and the low surface energy substance is modified to obtain the micro-droplet self-release surface, such surface can effectively delay the frost crystal formation under the conditions of high humidity and wall temperature lower than the freezing point, and the frost crystal covering time of the surface is dozens of times that of a smooth surface; by further combining with the auxiliary means with micro-energy consumption, the frost-free surface can be realized for a long time under low energy consumption.

Description

technical field [0001] The invention relates to an anti-frost method, in particular to a method for realizing anti-frost with low energy consumption by forming a specific nanostructure on the surface of a substrate, and belongs to the technical field of energy-saving nanometer materials. Background technique [0002] Frosting generally exists in heat pumps, refrigerators, air conditioners and other equipment, as well as in the aerospace industry, and has a huge impact on energy consumption and safety in the aerospace industry. Taking a heat pump as an example, after the evaporator is frosted, it will not only reduce the heat transfer efficiency, but even make the heat pump unit unable to work normally. Therefore, in order to increase the service life of machinery and reduce energy consumption, it is very important to find materials or methods to inhibit frost formation. The defrosting methods commonly used in industry are: natural defrosting, spray defrosting, electric heat...

Claims

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Application Information

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IPC IPC(8): B81C1/00B82Y30/00B82Y40/00
Inventor 高雪峰徐倩李娟田健朱杰
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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