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Aluminum fin material

A technology of fins and aluminum plates, which is applied in the field of aluminum fin materials for heat exchangers, can solve the problems of reduced hydrophilicity, easy blockage of fins, and hindrance of heat exchange function of heat exchangers, and achieves the effect of improving stamping processability

Inactive Publication Date: 2014-09-03
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in the invention of the above-mentioned patent document, if the hydrophilic resin film is in contact with water, the hydrophilicity decreases with time, and it is difficult to maintain the hydrophilicity of the fin surface for a long time.
That is, with long-term use, the dew condensation water adhering to the fins tends to become hemispherical, and as a result, the fins tend to be clogged.
Therefore, it is difficult to say that the problem of the heat exchange function of the heat exchanger being hindered has been solved.

Method used

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  • Aluminum fin material
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0032]

[0033] like figure 1 As shown, the aluminum fin material (hereinafter referred to as the fin material) 10A of the present invention includes in order: an aluminum plate or an aluminum alloy plate (hereinafter referred to as the aluminum plate) 1 , and a hydrophilic film layer 2 formed on the surface of the aluminum plate 1 and a lubricating film layer3. In addition, the lubricating film layer 3 includes a resin composition containing a lubricating resin and a crosslinking agent 6, and the ratio of the solid content of the crosslinking agent 6 to the total solid content of the lubricating resin and the crosslinking agent 6 is 0.2 to 70%. % by mass, the hydrophilic film layer 2 contains a resin composition containing a polymer having a carboxyl group or the like. Each configuration will be described below.

[0034] (aluminum plate)

[0035] The aluminum plate 1 used in the present invention is a plate material made of aluminum or an aluminum alloy. Such aluminum o...

no. 2 Embodiment approach

[0050] like figure 2 As shown, the fin material 10B preferably further includes a corrosion-resistant coating layer 5 containing a resin composition (corrosion-resistant resin composition) containing a corrosion-resistant resin between the aluminum plate 1 and the hydrophilic coating layer 2 .

[0051] (corrosion-resistant film layer)

[0052] The corrosion-resistant coating layer 5 improves the corrosion resistance of the fin material 10B, and also improves the adhesion of the hydrophilic coating layer 2 . In addition, since the corrosion-resistant film layer 5 is hydrophobic, it is possible to suppress the generation of unpleasant smell due to sub-film corrosion (corrosion of the aluminum plate 1 ) caused by water penetrating into the aluminum plate 1 .

[0053] The corrosion-resistant resin constituting the corrosion-resistant film layer 5 contains one or more types selected from polyester-based resins, polyolefin-based resins, epoxy-based resins, acrylic resins, and poly...

no. 3 Embodiment approach

[0057] like image 3 As shown, the fin material 10C preferably includes the chemical conversion treatment film layer 4 between the aluminum plate 1 and the hydrophilic film layer 2 .

[0058] (Chemical treatment film layer)

[0059] The presence of the chemical conversion treatment film layer 4 improves the corrosion resistance of the fin material 10C, and further improves the adhesion of the hydrophilic film layer 2 to the aluminum plate 1 . Therefore, the durability of the heat exchanger can be improved. In addition, the chemical conversion treatment film layer 4 is formed by subjecting the surface of the aluminum plate 1 to a chemical conversion treatment before forming the hydrophilic film layer 2 .

[0060] The chemical conversion treatment film layer 4 is preferably formed by performing an inorganic oxide treatment such as phosphoric acid chromate treatment or coating type zirconium treatment, or a known chemical conversion treatment such as organic-inorganic composite...

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Abstract

Provided is an aluminum fin material in which the hydrophilicity of a fin material surface is sustained for a long period time. A fin material (10A) having a hydrophilic film layer (2) and a lubricant film layer (3) provided to the surface of an aluminum plate (1) in the stated order, the fin material being characterized in that: the hydrophilic film layer (2) is composed of a polymer configured solely from a monomer having a carboxyl group, a copolymer containing a monomer having a carboxyl group, or a resin substance containing a hydrophilic resin as a mixture thereof; and the lubricant film layer (3) is composed of a resin composition in which a crosslinking agent (6) has a solids ratio of 0.2 to 70 mass%, the lubricant film layer (3) containing one or more lubricant resins selected from the group consisting of polyethylene glycol, carboxymethyl cellulose, and an alkali metal salt of carboxymethyl cellulose, and one or more crosslinking agents (6) selected from the group consisting of a water-soluble epoxy resin, a water-soluble carbodiimide compound, a water-dispersible carbodiimide compound, and a water-soluble oxazoline group-containing resin.

Description

technical field [0001] The present invention relates to an aluminum fin material made of aluminum or an aluminum alloy having a film layer formed on its surface, and particularly relates to an aluminum fin material for heat exchangers suitable for use in heat exchangers such as air conditioners. Background technique [0002] Due to global warming and the rapid increase in resource prices in recent years, there has been an increasing demand for performance improvements such as high efficiency and miniaturization of air conditioners. Aluminum plates excellent in thermal conductivity, workability, corrosion resistance, etc. (hereinafter, aluminum alloy plates are suitably included) are widely used in heat exchangers of air conditioners that reflect such demands. In addition, in order to reduce the volume of the heat exchanger of the air conditioner, fins are arranged side by side at narrow intervals. [0003] However, when the temperature of the surface of the fins falls below...

Claims

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Application Information

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IPC IPC(8): F28F13/18C10M107/34C10M107/36C10M177/00F28F1/32F28F19/04C10N30/00C10N40/00C10N70/00
CPCF28F13/18F28F1/32C10M2209/1023C10M2209/1045F28F17/005C10N2250/141C10M177/00C10M2209/123F28F1/12F28F2245/02F28F21/084C10M159/12F28F19/04C10M2217/0403C10N2050/025
Inventor 馆山庆太太田阳介
Owner KOBE STEEL LTD
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