CN102368030A - Flat copper cooling tube with film - Google Patents
Flat copper cooling tube with film Download PDFInfo
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- CN102368030A CN102368030A CN2011101759186A CN201110175918A CN102368030A CN 102368030 A CN102368030 A CN 102368030A CN 2011101759186 A CN2011101759186 A CN 2011101759186A CN 201110175918 A CN201110175918 A CN 201110175918A CN 102368030 A CN102368030 A CN 102368030A
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- flat tube
- cooling flat
- copper
- copper cooling
- film
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Abstract
The invention relates to a flat copper cooling tube with a film. The flat copper cooling tube is characterized in that: coating composite is coated on a copper or copper substrate surface of the flat copper cooling tube to form the film, and the coating composite is provided with Ag, methylphosphonic acid, polyacrylic ester, alcohol and water. The flat copper cooling tube with the film can guarantee sufficient hydrophily and corrosion resistance.
Description
Technical field
The present invention relates to a kind ofly form the copper of the outstanding organic film of hydrophily or the cooling flat tube material of copper alloy from the teeth outwards, but for example relate to for for the cooling flat tube material of heat exchanger etc., being the preferred long term maintenance dew copper cooling flat tube material of wetting surface texture easily.
Background technology
The heat exchanger outstanding copper materials such as heat conductivity, machinability, corrosion resistance that are widely used in order to carry out heat exchange effectively, in addition, also in order to make space compact (compact), adopt with the narrow interval and the structure of establishing copper cooling flat tube spare.Therefore, when the running of air conditioner, if the temperature of cooling flat tube material surface reaches below the dew point of air, the dew that then is attached on the cooling flat tube material surface condenses, and makes between the adjacent cooling flat tube inaccessible sometimes.At this moment, if the hydrophily of copper cooling flat tube material surface is low,,, thereby make the further variation of blocked state of cooling flat tube so that the dew that adheres to becomes is hemispherical then owing to become big with the contact angle of water.As a result, hot-swap feature receives known in the past problems such as the dew that hinders or cause owing to blast disperses outside air conditioner.
In order to improve the problem of above-mentioned dew, developed through surface and carried out hydrophilicity-imparting treatment copper coin self, so that when being processed into the cooling flat tube material and using, dew can not stop on the cooling flat tube surface and the technology that is removed easily, discharges.For example, disclose in the prior art and with the technology of synthetic silica and water paint.But if use synthetic silica, so add man-hour in the shaping of cooling flat tube material, there is the problem of the serious wear of instrument or metal mold etc. in the hardening of filming that then obtains.In addition, also have the distinctive cement of silica flavor or dust flavor, these stinks are considered to can bring unplessantness displeasure to human body owing to be adsorbed on that dispersing of material or silicon dioxide microparticle on the silica cause.Therefore, for example, the high-hydrophilic coating that uses cupric oxide colloidal sol replacement of silicon dioxide is disclosed in the prior art.In this technology, compare with the situation of using silica, although alleviate to some extent, still can observe stink, and if long-term the use, then stink increases, so still insufficient on this point that suppresses stink.
On the other hand; To disclose in the prior art that dew on the cooling flat tube material surface is long-time is detained and brings out hydration reaction or corrosion reaction in order suppressing to be attached to, to have used with the salt of carboxymethyl cellulose and N hydroxymethyl acrylamide technology as the surface conditioning agent of main component.In addition, disclose in the prior art in order to give corrosion resistance and hydrophily to the cooling flat tube material, using with polyvinyl alcohol and polyvinylpyrrolidone is effective as the surface conditioning agent of main component.At these in the past in the technology, owing to do not use silica etc., so can not cause the problem of wearing and tearing that stink or metal mold take place and so on.
In addition, the applicant continues the heat exchanger of the hydrophilic resin tunicle that is formed with organic system is inquired into copper cooling flat tube material.Formation is the method for the organic system resin coating layer of main component with polyvinyl alcohol and water-soluble nylon, water-soluble phenol etc., polyacrylic acid, polyethylene glycol etc.Unpleasant foul smell can not take place and keep hydrophily in these resin coating layer.
The processability of the hydrophilic tunicle of these organic system resin coating layer is outstanding and do not have a problem such as tool wear; In addition; The foul smell that does not also have silica to cause takes place, even but such serious unlike inorganic system, but the undeniable generation that has the slight foul smell in organic system resin source.
The organic system resin coating layer is utilized the coating that application contains the constituent of resin coating layer on copper coin such as glue spreader usually in the formation on the copper coin, carry out heat drying then and implement.Then, the hydrophily copper copper cooling flat tube that produces becomes heat exchanger through operation such as pressurization processing or copper pipe insertion, expander, soldering.Think in these a series of manufacturing processes, thus when resin coating layer forms or heat exchanger when making added heat can cause that the part generation thermal decomposition deterioration of resin coating layer produces foul smell.
Summary of the invention
The objective of the invention is to, a kind of copper cooling flat tube material that stops inorganic system to apply reliably is provided, and this cooling flat tube material can guarantee sufficient hydrophily, corrosion resistance.
For this reason, the invention provides a kind of can use for a long time also can protracted hydrophilicity or the copper cooling flat tube material with resin film of corrosion resistance.Technical scheme of the present invention is following:
A kind of copper cooling flat tube with film is characterized in that the copper cooling flat tube has application composition and forms film by on copper or copper substrate surface, being coated with, and this application composition has Ag, methylphosphonic acid, polyacrylate, alcohol and water.
Wherein, the content of Ag is 0.01-0.02 wt%, and the adding of Ag helps suppressing bacterium and kill bacteria; Thereby favourable inhibition the aging action of bacterium to film of the present invention, prevent the decline of film function, and eliminated the not generation of joyful gas.
Wherein, the content of methylphosphonic acid is 1.2-12.5 wt%; Preferably, the content of methylphosphonic acid is 2.5-10.5 wt%; More preferably, the content of methylphosphonic acid is 3.2-7.5 wt%.
Wherein, the content of described polyacrylate is 1.2-8.5 wt%; Preferably, the content of polyacrylate is 1.5-7.5 wt%; More preferably, the content of polyacrylate is 2.0-5.5 wt%.
Wherein, described alcohol can be selected from isopropyl alcohol, diethylene glycol (DEG), DPG, polyethylene glycol, 1,2-propane diols, 1,3-butanediol, 1, one or more of 4-butanediol, glycerine.And preferably, the content of described alcohol is 5.0-18.5 wt%; Preferably, the content of described alcohol is 7.5-15.5 wt%; More preferably, the content of described alcohol is 9.0-13.5wt%.
Wherein, the thickness of described film is preferably 0.2-2.0 μ m; Preferably, its content is 0.5-1.5 μ m; At thickness is under the situation below the lower limit, and hydrophily descends, and is being under the situation more than the higher limit, and heat exchange efficiency descends.
Copper product was the high material of corrosion resistance originally, but the copper cooling flat tube is under the moistening atmosphere owing to the existence of dew, so be exposed in the environment of easy generation corrosion.Can know in that any corrosion resistance layer is not set only to apply under the situation of hydrophilic resin layer that corrosion is carried out in the copper material under this hydrophilic resin layer easily, therefore cause the performance of film to reduce.Thereby, be added with polyacrylate among the present invention as corrosion-resistant component.
Methylphosphonic acid in the application composition of the present invention has water-soluble or certain hydrophily, so if on copper-based material, adhere to the film that cooperation contains methylphosphonic acid, then the hydrophily of this film can variation.Therefore; The condensate that takes place in the running of heat exchanger can adapt to the hydrophily on copper cooling flat tube surface well and flow easily; Thereby quicken the discharge of condensate, cooling flat tube can not block because of being condensed, thereby can stop the variation of heat exchange efficiency effectively.
When embodiment of the present invention, unqualified to the formation method of film, for example as long as form above-mentioned application composition, known method such as heat after coating it on copper coin then and apply and form film.In addition, when embodiment of the present invention, also unqualified to coating process.
In addition; Also can be in the scope that does not hinder performance of the present invention; In being used to form the composition of film, add the various coating additives that are used to improve coating or operability etc., for example at random appropriate table surface-active agent, Surface Machining agent, crosslinking agent, defoamer, levelling agent, antiseptic, other mould resistants etc. get final product.
The specific embodiment
Utilize existing manufacturing approach in the prior art, make the copper material matrix.Use alkaline rinse at first this copper material to be carried out oil removing.
The copper material that will pass through after the above-mentioned processing is used material as test, utilizes prior art to be processed into the copper cooling flat tube.Then, through applying application composition of the present invention, that is: according to the ratio of table 1 record, be coated on the inner surface of copper cooling flat tube, coating thickness is 0.5 mm, and the heat treated temperature is 180 ℃, forms described copper cooling flat tube with film.
Each copper cooling flat tube material to preparing carries out the test of following various performances.
The hydrophily test
At flow is 8 hours copper cooling flat tube materials of dipping in the running water of 1 L/min, then 80 ℃ dry 16 hours down, these operations as 1 circulation (cycle), are carried out 5 circulations.Then, the water droplet of about 0.5 microlitre of drippage (microliter) on the inner surface of copper cooling flat tube material uses the contact angle determination device to measure contact angle.
Then, carry out hydrophily evaluation according to following standard based on the copper cooling flat tube material of these measurement of contact angle values.
Outstanding: contact angle is less than 20 °
Well: contact angle is 20 ° to 40 ° (comprise 20 °, but do not comprise 40 °)
Qualified: contact angle is 40 ° to 60 ° (comprise 40 °, but do not comprise 60 °)
Bad: contact angle is more than 60 °.
Corrosion resistance is estimated
Each copper cooling flat tube material to trial-production is implemented neutral salt spray test (GB 6458-86), and be 720 h experimental period.After carrying out these tests, the outward appearance of each test piece of visualization, the long-pending ratio of all surfaces of the relative copper cooling flat tube of the area material of counting corrosion part according to criterion, is estimated the extent of corrosion of copper cooling flat tube material.
Well: the ratio of corroded area is less than 5%;
Qualified:The ratio of corroded area is 5%-10% (not comprising 10%);
Bad: the ratio of corroded area is more than 10%.
The constituent content of table 1 application composition (wt%), wherein surplus is a water.
| Experiment numbers | Ag | Methylphosphonic acid | Polyacrylate | Diethylene glycol (DEG) |
| 1 | 0.01 | 1.2 | 1.2 | 5.0 |
| 2 | 0.01 | 2.5 | 2.0 | 7.5 |
| 3 | 0.01 | 3.6 | 3.2 | 9.5 |
| 4 | 0.01 | 4.8 | 4.5 | 11.5 |
| 5 | 0.02 | 6.0 | 5.6 | 13.5 |
| 6 | 0.02 | 7.5 | 6.8 | 15.0 |
| 7 | 0.02 | 10.0 | 7.5 | 16.8 |
| 8 | 0.02 | 12.5 | 8.5 | 18.5 |
Table 2The test evaluation result
| Experiment numbers | Hydrophily | Corrosion resistance |
| 1 | Well | Well |
| 2 | Outstanding | Well |
| 3 | Outstanding | Well |
| 4 | Outstanding | Well |
| 5 | Outstanding | Well |
| 6 | Outstanding | Well |
| 7 | Outstanding | Well |
| 8 | Outstanding | Well |
Claims (7)
1. copper cooling flat tube with film is characterized in that the copper cooling flat tube has application composition and forms film by on copper or copper substrate surface, being coated with, and this application composition has Ag, methylphosphonic acid, polyacrylate, alcohol and water.
2. the described copper cooling flat tube of claim 1, the content that it is characterized in that described Ag is 0.01-0.02 wt%.
3. the described copper cooling flat tube of claim 1, the content that it is characterized in that described methylphosphonic acid is 1.2-12.5 wt%.
4. the described copper cooling flat tube of claim 1, the content that it is characterized in that described polyacrylate is 1.2-8.5 wt%.
5. the described copper cooling flat tube of claim 1 is characterized in that described alcohol is selected from isopropyl alcohol, diethylene glycol (DEG), DPG, polyethylene glycol, 1,2-propane diols, 1,3-butanediol, 1, one or more of 4-butanediol, glycerine.
6. the described copper cooling flat tube of claim 5, the content that it is characterized in that described alcohol is 5.0-18.5 wt%.
7. the described copper cooling flat tube of claim 1, the thickness that it is characterized in that described film is 0.2-2.0 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101759186A CN102368030A (en) | 2011-06-28 | 2011-06-28 | Flat copper cooling tube with film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101759186A CN102368030A (en) | 2011-06-28 | 2011-06-28 | Flat copper cooling tube with film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102368030A true CN102368030A (en) | 2012-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101759186A Pending CN102368030A (en) | 2011-06-28 | 2011-06-28 | Flat copper cooling tube with film |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486505A (en) * | 2001-01-16 | 2004-03-31 | Ammonium oxalate-containing polishing system and method | |
| CN1646639A (en) * | 2002-03-13 | 2005-07-27 | 罗狄亚化学公司 | Use of block copolymers bearing phosphate and/or phosphonate functions as adhesion promoters or as protecting agents against the corrosion of a metallic surface |
| US20070208119A1 (en) * | 2006-03-01 | 2007-09-06 | Ueda Ken-Ichi | Thermoplastic resin composition and production process thereof |
| CN101048135A (en) * | 2004-09-07 | 2007-10-03 | 3M创新有限公司 | Phenolic antiseptic compositions and methods of use |
| CN101175798A (en) * | 2005-05-13 | 2008-05-07 | 宝洁公司 | Functionalized films |
| EP2050796A1 (en) * | 2001-06-20 | 2009-04-22 | Rohm and Haas Company | Coating with improved hiding, compositions prepared therewith, and processes for the preparation thereof |
| WO2009119689A1 (en) * | 2008-03-25 | 2009-10-01 | 富士フイルム株式会社 | Hydrophilic member, fin member, aluminum fin member, heat exchanger and air conditioner |
-
2011
- 2011-06-28 CN CN2011101759186A patent/CN102368030A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486505A (en) * | 2001-01-16 | 2004-03-31 | Ammonium oxalate-containing polishing system and method | |
| EP2050796A1 (en) * | 2001-06-20 | 2009-04-22 | Rohm and Haas Company | Coating with improved hiding, compositions prepared therewith, and processes for the preparation thereof |
| CN1646639A (en) * | 2002-03-13 | 2005-07-27 | 罗狄亚化学公司 | Use of block copolymers bearing phosphate and/or phosphonate functions as adhesion promoters or as protecting agents against the corrosion of a metallic surface |
| CN101048135A (en) * | 2004-09-07 | 2007-10-03 | 3M创新有限公司 | Phenolic antiseptic compositions and methods of use |
| CN101175798A (en) * | 2005-05-13 | 2008-05-07 | 宝洁公司 | Functionalized films |
| US20070208119A1 (en) * | 2006-03-01 | 2007-09-06 | Ueda Ken-Ichi | Thermoplastic resin composition and production process thereof |
| WO2009119689A1 (en) * | 2008-03-25 | 2009-10-01 | 富士フイルム株式会社 | Hydrophilic member, fin member, aluminum fin member, heat exchanger and air conditioner |
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Application publication date: 20120307 |