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Hydrophilic modifying method and heat exchanger treated with it

一种亲水改性、热交换器的技术，应用在热交换设备、蓄热式换热器、传热改性等方向，能够解决表面很难亲水性、接触到恶劣条件等问题

Inactive Publication Date: 2002-11-06
NIPPON PAINT SURF CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned surface of the aluminum heat sink modified to impart hydrophilicity, etc., is exposed to harsh conditions, that is, subjected to repeated heating and cooling and condensed water and adhering of mixed dust and microorganisms in the atmosphere
Therefore, it is difficult for the surface to remain hydrophilic for a long time

Method used

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  • Hydrophilic modifying method and heat exchanger treated with it

Examples

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Embodiment 1-21

[0080] (Preparation of hydrophilic modifier)

[0081] According to the formula shown in Table 1, the hydrophilic modifier with each concentration (mass%) given in Table 1 is obtained by combining modified polyvinyl alcohol powder, phosphorus compound salt, boron compound salt, and hydrophilic It is prepared by blending organic compounds, crosslinking agents, etc. PVA-1 [degree of saponification 99%; number average molecular weight 50,000] is used as polyvinyl alcohol which does not have any group related to the above-mentioned general formula (I). Used as the modified polyvinyl alcohol are PVA-2, PVA-3 and PVA-4 [n in the above general formula (I) are 10, 10 and 20, respectively; the groups represented by the structural formula (I), respectively It accounts for 5 mol%, 1 mol% and 1 mol% relative to the hydroxyl and acetoxy groups in the molecule; the saponification degree is 99% and the number average molecular weight is 50,000, in each case]. The carboxylic acid-modified polyviny...

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Abstract

Hydrophilic modification method, including the step of forming a coating with a solid coating amount of 0.02-3g / m2 on a heat exchanger with a hydrophilic modifier after antirust treatment, wherein the hydrophilic modifier is included in its side chain Modified polyvinyl alcohol (A) having a group represented by the following structural formula (I), in the structural formula, n represents an integer from 1 to 500, R1 represents a hydrogen atom or an alkyl group containing 1-4 carbon atoms, and R2 represent a hydrogen atom or a methyl group, and at least one substance (B) selected from phosphorus compound salts and boron compound salts of Ca, Al, Mg, Fe and Zn, and the group represented by structural formula (I) accounts for 0.01-20 mole percent relative to the hydroxyl group and acetoxy group contained in the above-mentioned modified polyvinyl alcohol.

Description

Technical field [0001] The present invention relates to a modifier for obtaining hydrophilicity and a hydrophilic modification method for providing an evaporator and heat exchanger having good hydrophilicity and odor prevention ability even after long-term use. Background technique [0002] Evaporators and heat exchangers usually have a complicated structure, that is, they have aluminum fins arranged at short intervals for heat exchange and also have messy arrangements for feeding the cooling medium into these fins. Aluminum tube. Therefore, the discharge of condensed water after the cooling operation can be promoted by modifying the surface of the aluminum heat sink to be hydrophilic. However, the above-mentioned surface of the aluminum heat sink that has been modified to impart hydrophilicity, etc., is exposed to severe conditions, that is, undergoing repeated heating and cooling, as well as mixing and adhesion of condensed water, dust and microorganisms in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L71/02C09D7/80C09D129/04F28D17/00F28F13/04F28F13/18
CPCC08K3/32C08K3/38C08L29/04C08L71/02C08L2205/02C09D129/04F28D17/005F28F13/18F28F2245/02C08L2666/04C08L2666/14
Inventor 印部俊雄前川进牛尾朗斋藤宏一松井德纯加濑部修小林健吾菅原博好内山一寿
Owner NIPPON PAINT SURF CHEM
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