JPH0345894A - Fin material for heat exchanger - Google Patents

Fin material for heat exchanger

Info

Publication number
JPH0345894A
JPH0345894A JP18106589A JP18106589A JPH0345894A JP H0345894 A JPH0345894 A JP H0345894A JP 18106589 A JP18106589 A JP 18106589A JP 18106589 A JP18106589 A JP 18106589A JP H0345894 A JPH0345894 A JP H0345894A
Authority
JP
Japan
Prior art keywords
fin material
heat exchanger
aluminum
film
fin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP18106589A
Other languages
Japanese (ja)
Other versions
JP2690151B2 (en
Inventor
Akiko Iwamoto
岩本 明子
Yoshiyuki Tsuda
津田 善之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Refrigeration Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Refrigeration Co filed Critical Matsushita Refrigeration Co
Priority to JP18106589A priority Critical patent/JP2690151B2/en
Publication of JPH0345894A publication Critical patent/JPH0345894A/en
Application granted granted Critical
Publication of JP2690151B2 publication Critical patent/JP2690151B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To reduce a decrease in room heating and cooling capacity of a heat pump by employing a fin material provided with a thin film to follow rough surface of an aluminum film material having an uneven parts of specific surface roughness as a fin material for a heat exchanger on the fin material. CONSTITUTION:An aluminum fin material for a heat exchanger is composed of an aluminum alloy plate imparted with surface roughness of 0.2 - 5mum to its surface, and a water repellent thin film so coated as to follow the uneven part of the surface. Thus, since droplets adhered to the surface are easily rolled to be dropped without remain due to small contact of the droplet with the surface in addition to the water repellent effect of the thin film, a fin material for a heat exchanger having high performance can be obtained. For example, carbon tetrafluoride plasma polymerized coating resin film is formed on an aluminum alloy plate added directly with an uneven part on its surface to obtain an aluminum film material. In this case, the rough surface may be formed by rolling or ceramic coating, or a coating may be formed of a LB film, by a sputtering, a depositing method.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、熱交換器用フィン材に関するもので、特にそ
の表面に凝縮水が溜まらないようにした熱交換器用フィ
ン材に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fin material for a heat exchanger, and more particularly to a fin material for a heat exchanger that prevents condensed water from accumulating on its surface.

従来の技術 近年、空気調和機における、空気熱源ヒートポンプ式空
気調和機(以下単にヒートポンプと呼ぶ)のしめる割合
が急増してきており、家庭用ルールエアコン、業務用ル
ームエアコン等については、半数以上を占めている。又
、これらヒートポンプに用いられる熱交換器の大部分は
、アルミフィンと、これに直行する冷媒管から構成され
ているフィンチューブ型熱交換器である。ヒートポンプ
にふ・いて、冷房時には室内側熱交換器のフィン表面に
水分の凝縮が起こり、フィン間に釦ける凝縮水のブリッ
ジ現象によシ、室内側熱交換器通過風量の低下を招き、
ひいては冷房能力の低下の原因となる。一方、暖房時に
は、室外側熱交換器にかいて、前述した冷房時の室内側
熱交換器と同様の現象が起こる。喧た暖房時にかいては
、外気温度によって、室外側熱交換器に着霜が起こる。
Conventional technology In recent years, the proportion of air-source heat pump type air conditioners (hereinafter simply referred to as heat pumps) among air conditioners has rapidly increased, and they now account for more than half of household rule air conditioners, commercial room air conditioners, etc. ing. Furthermore, most of the heat exchangers used in these heat pumps are fin-tube heat exchangers that are composed of aluminum fins and refrigerant pipes that run perpendicularly to the aluminum fins. When a heat pump is used for cooling, moisture condenses on the fin surface of the indoor heat exchanger, causing a bridging phenomenon of condensed water between the fins, resulting in a decrease in the amount of air passing through the indoor heat exchanger.
This in turn causes a decrease in cooling capacity. On the other hand, during heating, the same phenomenon occurs in the outdoor heat exchanger as in the aforementioned indoor heat exchanger during cooling. During noisy heating, frost builds up on the outdoor heat exchanger due to the outside temperature.

室外側熱交換器に着霜した場合は、通風抵抗が増加し、
暖房能力の低下の原因となシ、さらに進むと、着霜によ
るフィンの目づlりが生じ、その場合暖房運転を一時停
止し、除霜を行なう必要があるため、暖房の快適性を損
なう原因にもなる。従って前記冷房能力、暖房能力の低
下を減少させるため、及び、暖房時に釦ける室外機熱交
換器の着霜を減少し除霜回数を減らし快適性を向上させ
るためには、室内機及び、室外機の熱交換器のフィン表
面の凝縮水を常に取シ除けば良いわけである。その方法
として、フィン表面を撥水化して凝縮水を転がシ落とす
方法がある。
If frost forms on the outdoor heat exchanger, ventilation resistance increases,
This will cause a decrease in heating capacity, and if the heating progresses further, the fins will become clogged due to frost formation, in which case heating operation will need to be temporarily stopped and defrosted, which will impair the comfort of heating. It can also be a cause. Therefore, in order to reduce the decline in the cooling capacity and heating capacity, and to reduce frost formation on the outdoor unit heat exchanger that is pressed during heating, reduce the number of times of defrosting, and improve comfort, it is necessary to All you have to do is constantly remove the condensed water on the fin surface of the machine's heat exchanger. One way to do this is to make the fin surface water repellent so that the condensed water rolls off.

その方法として例えば、実開昭48−11414号公報
、実開昭51−15261号公報で提案されているよう
に、4フツ化エチレン樹脂、塩化3フツ化エチレン樹脂
などのコーティングが知られている。
As a method for this, coating with tetrafluoroethylene resin, trifluoroethylene chloride resin, etc. is known, as proposed in, for example, Japanese Utility Model Application Publication No. 48-11414 and Japanese Utility Model Application Publication No. 51-15261. .

発明が解決しようとする課題 前記撥水性に優れた樹脂を塗布したフィン材表面におい
ては、直径約2細以上の比較的大きな凝縮水をフィン表
面から転がり落とすことが可能であシ、熱交換器用フィ
ン材としである程度の効果が期待できる。しかし、最近
の熱交換器は、高能力化を目的とし、フィン総表面積を
増やすべくそのフィン間隔が狭くなる傾向にある。現在
の熱交換器のフィン間隔は、約2〜3Mが一般的であシ
、前記の撥水性に優れた樹脂を塗布する方法では、直径
1■程度の微細な液滴をフィン表面から落とすことはで
きないため、フィン表面に残存した水滴が、フィン間に
ブリッジを起こし溜るため、通風抵抗となったblその
筐ま氷結し霜となるなど。
Problems to be Solved by the Invention On the surface of the fin material coated with the resin with excellent water repellency, it is possible to roll off relatively large condensed water with a diameter of about 2 microns or more from the fin surface. It can be expected to have some effect as a fin material. However, in recent heat exchangers, the fin spacing tends to become narrower in order to increase the total fin surface area in order to increase the capacity. The fin spacing of current heat exchangers is generally about 2 to 3 m, and the method of applying resin with excellent water repellency described above involves dropping fine droplets of about 1 inch in diameter from the fin surface. Since water droplets remaining on the fin surface create bridges between the fins and accumulate, this creates ventilation resistance and freezes on the casing, forming frost.

その撥水効果が不十分であった。従って、ヒートポンプ
の冷房暖房能力を低下させないようフィン表面の凝縮水
を常に取り除くことが可能な高性能な熱交換器用フィン
材を提供するものである。
Its water repellent effect was insufficient. Therefore, it is an object of the present invention to provide a high-performance fin material for a heat exchanger that can constantly remove condensed water on the surface of the fins so as not to reduce the cooling/heating capacity of the heat pump.

課題を解決するための手段 この目的を達成するために本発明の熱交換器用アルミフ
ィン材は、その表面に0.2μm〜5μmの表面粗度を
付与した7ルミニウム合金板と、その表面の凹凸に追随
するようにコーティングした撥水性の薄膜から構成され
てしる。
Means for Solving the Problems To achieve this object, the aluminum fin material for heat exchangers of the present invention consists of a 7-luminium alloy plate whose surface has been given a surface roughness of 0.2 μm to 5 μm, and an uneven surface. It is composed of a water-repellent thin film coated to conform to the water.

作  用 上記構成により、表面に付着した水滴は、薄膜の撥水効
果に加え、表面と水滴との接触面積が小さいことから容
易に転がジ落ち残溜することがないため、高性能な熱交
換器用フィン材を得ることができる。
Effect With the above structure, water droplets adhering to the surface not only have the water-repellent effect of the thin film, but also the contact area between the surface and the water droplets is small, so they easily roll off and do not remain behind, allowing for high-performance heat treatment. Fin material for exchangers can be obtained.

実施例 以下本発明の一実施例について説明する。Example An embodiment of the present invention will be described below.

表は、実施例として薬品処理によって、表面に直接凹凸
を付加したアルミニウム合金板上にその凹凸に追随する
ように47フ化炭素のデヲズマ重合コーティング樹脂膜
を形成したアルミニウムフィン材、比較例として通常の
アルミニウム合金板(表面粗成約0.1μm)及び、実
施例と同様に薬品処理をして表面に10μmの凹凸を付
与したアルミニウム合金上に47フ化炭素のプラズマx
合コーティング樹脂膜を形成したアルミニウムフィン材
、表面に直接凹凸を付与したアルミニウム合金板上にフ
ッソ樹脂をスプレーコーティングしたアルミニウムフィ
ン材に、直径約1鴫の水滴を落とした時の転落角を示す
。転落角は試料表面を傾斜させ表面に滴下した液滴がす
ベシ始める時点での試料板の傾斜角度をいう。転落角が
小さい程試料表面と液滴との相互作用が小さい、すなわ
ち液滴が落下しやすいことを意味する。一方、試料表面
と液滴との相互作用が大き過ぎると試料表面を90度傾
斜させても転落しない。
The table shows, as an example, an aluminum fin material in which a 47 fluorocarbon deosma polymerization coating resin film was formed on an aluminum alloy plate whose surface was directly roughened by chemical treatment, so as to follow the roughness, and as a comparative example, an aluminum fin material was used. 47 fluorocarbon plasma
This figure shows the falling angle when a water droplet with a diameter of about 1 drop is dropped on an aluminum fin material with a coating resin film formed on it, and an aluminum fin material with a fluorocarbon resin spray-coated on an aluminum alloy plate whose surface is directly textured. The falling angle refers to the angle of inclination of the sample plate at the point when the sample surface is tilted and droplets dropped onto the surface begin to fall. The smaller the falling angle, the smaller the interaction between the sample surface and the droplet, which means that the droplet falls more easily. On the other hand, if the interaction between the sample surface and the droplet is too large, the droplet will not fall even if the sample surface is tilted 90 degrees.

表でも判るように、比較例は試料表面を90度傾斜させ
ても液滴は転落しなかったが、本実施例では転落角度が
大幅に小さくなっている。これは、プラズマ重合膜によ
シ表面が撥水性になっているのに加えて、フィン上の凹
凸によシ液滴との接触面積が小さくなう、液滴をフィン
表面に留めておくことができないためである。面粗度0
.1μmでば、比較例罵1に示すように、その効果が得
られなかったことから0.2μm以上は必要である。ま
た、表面粗度5μm以上例えば10μmでも比較例点2
に示すように、その効果が得られず、5μm以下である
ことが必要である。さた、通常のコーティング方法を用
いた場合基板を粗面化しても付与した凹凸に沿わずコー
ティング面粗度0.1μm程度になシ、微視的に見ると
平滑面となるため効果カナイ。尚、本実施例はアルミニ
ウムフィン材上に凹凸を付ける方法としては薬品処理を
行なったが、その他、ロール加工によって圧延時に直接
凹凸を付ける方法、會た、セラミックコーティングによ
シ粗面を形成する方法なども同様の効果が得られる。更
に、薄膜コーティングとして本実施例テハ、プラズマ重
合を行ったが、アルミニウム基板の凹凸に追随するもの
であればよく、例えば、LB膜、スパッタリング、蒸着
法も同様の効果が得られる。
As can be seen from the table, in the comparative example, the droplet did not fall even when the sample surface was tilted 90 degrees, but in this example, the falling angle was significantly smaller. This is because, in addition to the plasma-polymerized film making the surface water-repellent, the unevenness on the fins reduces the contact area with droplets and keeps the droplets on the fin surface. This is because it is not possible. Surface roughness 0
.. If the thickness was 1 μm, the effect could not be obtained as shown in Comparative Example 1, so a thickness of 0.2 μm or more is required. In addition, even if the surface roughness is 5 μm or more, for example 10 μm, Comparative Example 2
As shown in Figure 2, this effect cannot be obtained, and the thickness needs to be 5 μm or less. Furthermore, when using a normal coating method, even if the surface of the substrate is roughened, the surface roughness of the coating does not conform to the provided unevenness and is only about 0.1 μm, but when viewed microscopically, it becomes a smooth surface, so it is not effective. In this example, chemical treatment was used as a method of forming unevenness on the aluminum fin material, but other methods include forming unevenness directly during rolling by roll processing, forming a rough surface by using ceramic coating, etc. A similar effect can be obtained by other methods. Furthermore, although plasma polymerization was used as a thin film coating in this embodiment, any method that follows the irregularities of the aluminum substrate may be used, and similar effects can be obtained by, for example, an LB film, sputtering, or vapor deposition method.

発明の効果 本発明では、表面粗度0.2μm〜5μmの凹凸を有す
るアルミニウムフィン材上に、その粗面に追随するよう
に薄膜を施したフィン材を熱交換器用フィン材として用
いることによシ、フィン間隔が2m!1程度と狭い場合
でもフィン表面に凝縮した水滴を、転がシ落とすために
有効な性能を有する。
Effects of the Invention In the present invention, a fin material in which a thin film is applied to an aluminum fin material having irregularities with a surface roughness of 0.2 μm to 5 μm so as to follow the rough surface is used as a fin material for a heat exchanger. Shi, the fin spacing is 2m! It has effective performance in rolling off water droplets condensed on the fin surface even when the width is as narrow as 1.

したがってヒートポンプ熱交換器の着霜によるフィン間
の目づ1シを遅らせることによシ、ヒートポンプとして
冷房能力、暖房能力の低下を減少させると共に、暖房時
室外機熱交換の除霜間隔を延長することができ、快適性
を向上させることができるO
Therefore, by delaying the cracking between the fins of the heat pump heat exchanger due to frost formation, it is possible to reduce the decrease in the cooling and heating capacities of the heat pump, and to extend the defrosting interval for outdoor unit heat exchange during heating. O that can improve comfort

Claims (1)

【特許請求の範囲】[Claims] 表面粗度0.2μm〜5μmのアルミニウム合金板と、
その粗面に追随するような撥水性薄膜を有する熱交換器
用フィン材。
An aluminum alloy plate with a surface roughness of 0.2 μm to 5 μm,
A fin material for heat exchangers that has a water-repellent thin film that follows the rough surface.
JP18106589A 1989-07-12 1989-07-12 Fin material for heat exchanger Expired - Lifetime JP2690151B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18106589A JP2690151B2 (en) 1989-07-12 1989-07-12 Fin material for heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18106589A JP2690151B2 (en) 1989-07-12 1989-07-12 Fin material for heat exchanger

Publications (2)

Publication Number Publication Date
JPH0345894A true JPH0345894A (en) 1991-02-27
JP2690151B2 JP2690151B2 (en) 1997-12-10

Family

ID=16094180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18106589A Expired - Lifetime JP2690151B2 (en) 1989-07-12 1989-07-12 Fin material for heat exchanger

Country Status (1)

Country Link
JP (1) JP2690151B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001525493A (en) * 1997-12-04 2001-12-11 コリア インスティテュート オブ サイエンス アンド テクノロジー Improvement of metal surfaces by plasma polymerization for use in cooling and air conditioning

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001525493A (en) * 1997-12-04 2001-12-11 コリア インスティテュート オブ サイエンス アンド テクノロジー Improvement of metal surfaces by plasma polymerization for use in cooling and air conditioning
US7178584B2 (en) 1997-12-04 2007-02-20 Korea Institute Of Science And Technology Plasma polymerization enhancement of surface of metal for use in refrigerating and air conditioning

Also Published As

Publication number Publication date
JP2690151B2 (en) 1997-12-10

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