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Aluminum fins for heat exchangers

A technology for heat exchangers and aluminum fins, applied in the field of fin materials, can solve the problems of color spots, easy to be conspicuous, etc., and achieve the effects of improving hydrophilicity, preventing loss and preventing sticking

Inactive Publication Date: 2016-08-24
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, as long as the white appearance is slightly uneven, stains will form, which are easy to be eye-catching
[0019] That is, the technology of Patent Document 4 still has room for improvement in the adhesiveness in a humid environment, and it is necessary to prevent the productivity, processability, defrosting and re-frost prevention accompanying insufficient adhesion in a humid environment. There is also room for reduction in performance, and there is also room for improvement in appearance

Method used

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  • Aluminum fins for heat exchangers
  • Aluminum fins for heat exchangers
  • Aluminum fins for heat exchangers

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0055]

[0056] like figure 1 As shown in (a), an aluminum fin material for a heat exchanger (hereinafter, appropriately referred to as a fin material) 1A according to the first embodiment includes a substrate 2 and a corrosion-resistant film 3a (substrate treatment layer) formed on the surface of the substrate 2. 3) The hydrophilic treatment layer 4 formed on the surface of the corrosion-resistant film 3a.

[0057] (substrate)

[0058] The substrate 2 is a plate made of aluminum or an aluminum alloy, and since it has excellent thermal conductivity and workability, aluminum of the 1000 series specified in JIS H4000 is suitably used, and aluminum of alloy numbers 1050, 1070, and 1200 is more preferably used. In addition, as for the substrate 2, in the aluminum fin material 1 for a heat exchanger, one having a plate thickness of about 0.08 to 0.3 mm is used in consideration of strength, thermal conductivity, workability, and the like. In addition, the substrate 2 is manufact...

no. 2 approach

[0100]

[0101] like figure 1 As shown in (b), the aluminum fin material 1B for a heat exchanger according to the second embodiment includes a substrate 2, a hydrophobic coating layer 3b (base treatment layer 3) formed on the surface of the substrate 2, and a hydrophobic coating layer 3b formed on the surface of the substrate 2. Hydrophilic treatment of the surface of layer 3b to layer 4.

[0102] (basic processing layer)

[0103] The base treatment layer 3 is composed of a hydrophobic coating layer 3b, and the hydrophobic coating layer 3b is formed by at least one of polyurethane resin, epoxy resin, polyester resin and polyacrylic resin. Resin composition.

[0104] Formation of such a hydrophobic coating layer 3b prevents condensed water permeating the hydrophilic treatment layer 4 from coming into contact with the substrate 2 even in a severe humid environment such as an acidic atmosphere. As a result, the generation of aluminum oxide due to corrosion (oxidation) of the...

no. 3 approach

[0107]

[0108] like figure 1As shown in (c), the aluminum fin material 1C for a heat exchanger according to the third embodiment includes a substrate 2, a corrosion-resistant film 3a (primary treatment layer 3) formed on the surface of the substrate 2, and a corrosion-resistant film 3a formed on the surface of the substrate 2. The hydrophobic coating layer 3b (basic treatment layer 3) on the surface of the hydrophobic coating layer 3b, and the hydrophilic treatment layer 4 formed on the surface of the hydrophobic coating layer 3b.

[0109] In addition, when the base treatment layer 3 is made of the corrosion-resistant film 3a and the hydrophobic coating layer 3b, as figure 1 As shown in (c), it is preferable to form the corrosion-resistant film 3 a on the substrate 2 side.

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Abstract

The object of the present invention is to provide an aluminum fin material for heat exchangers that is excellent in the persistence of hydrophilicity and exhibits good adhesion even in a humid environment. An aluminum fin material for a heat exchanger, characterized in that it has a substrate (2), is formed on the surface of the substrate (2), and is composed of at least one of a corrosion-resistant film (3a) and a hydrophobic coating layer (3b). The base treatment layer (3) consisting of one layer is formed on the surface of the base treatment layer (3), and is composed of predetermined silica-based porous particles (4a), carboxyl group-containing polymers (4b) and hydroxyl group-containing polymers. A hydrophilic treatment layer (4) composed of a coating film of a mixture of molecules (4b), the adhered amount of the silica-based porous body particles (4a) is a predetermined amount, and the silica-based porous body particles (4a) The ratio of the solid content weight of the carboxyl group-containing polymer (4b) to the total solid content weight of the hydroxyl group-containing polymer (4b) is 1.0 to 3.5, and the solid content of the carboxyl group-containing polymer (4b) The ratio of the weight to the weight of the solid content of the hydroxyl-containing polymer (4b) is 0.1 to 10.0.

Description

technical field [0001] The present invention relates to a fin material for a heat exchanger, and more particularly to an aluminum fin material for a heat exchanger including a substrate made of aluminum or an aluminum alloy. Background technique [0002] Heat exchangers are used in products in various fields such as room air conditioners, combination air conditioners, refrigerated showcases, refrigerators, oil coolers, and radiators. [0003] When the heat exchanger is driven (condensing operation), water vapor in the air is liquefied (condensed), and water droplets generated by the liquefaction adhere to the fin surfaces of the heat exchanger. As a result, bridging of water droplets is formed between the fins, or frost is formed due to the use environment, clogging occurs between the fins, the ventilation resistance value increases, and the heat exchange rate (heat exchange efficiency) of the heat exchanger decreases. [0004] In order to prevent the reduction of the heat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F13/18C09D7/12C09D201/06C09D201/08C23C22/36C23C28/00
Inventor 丰田祐介太田阳介
Owner KOBE STEEL LTD