JP2003314974A - Ammonia refrigerant refrigerating device - Google Patents
Ammonia refrigerant refrigerating deviceInfo
- Publication number
- JP2003314974A JP2003314974A JP2002118846A JP2002118846A JP2003314974A JP 2003314974 A JP2003314974 A JP 2003314974A JP 2002118846 A JP2002118846 A JP 2002118846A JP 2002118846 A JP2002118846 A JP 2002118846A JP 2003314974 A JP2003314974 A JP 2003314974A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- ammonia
- heat exchanger
- fin
- refrigerating apparatus
- 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
Links
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は主として冷凍食品の
凍結、冷蔵倉庫等の大型の業務用（すなわち一般家庭、
カーエアコン等における小型・一般的なものを除く）と
して使用されるアンモニア冷媒冷凍装置に係り、特にそ
の冷凍装置におけるフィンアンドチューブ型熱交換器を
改良したアンモニア冷媒冷凍装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to freezing frozen foods, large-scale commercial use such as refrigerating warehouses (that is, general households,
The present invention relates to an ammonia refrigerant refrigerating device used as a small and general type in car air conditioners and the like, and particularly to an ammonia refrigerant refrigerating device having an improved fin-and-tube heat exchanger in the refrigerating device.
【０００２】[0002]
【従来の技術】近時、オゾン層破壊、地球温暖化等の地
球環境を劣悪化する諸問題に対処するために、冷蔵・冷
凍用の従来から多用されてきたフルオロカーボン系冷媒
の使用が規制されてきている。そのためこのフルオロカ
ーボン系冷媒の代替冷媒として大型冷凍機においては、
地球環境を汚染しないこと、冷凍効果が大きいこと等の
多くの利点によってアンモニア冷媒を使用することが復
活してきている。2. Description of the Related Art Recently, in order to deal with various problems such as ozone depletion and global warming, which worsen the global environment, the use of fluorocarbon refrigerants that have been frequently used for refrigeration and freezing is regulated. Is coming. Therefore, in a large refrigerator as an alternative refrigerant of this fluorocarbon refrigerant,
The use of ammonia refrigerant has been revived due to many advantages such as not polluting the global environment and having a great refrigerating effect.
【０００３】このアンモニア冷媒による冷凍サイクルに
おいては、銅系材料はフルオロカーボン系冷媒には対応
可能であっても、アンモニア冷媒には腐食されるために
使用できないものである。そのため従来は鉄製チューブ
の外周に鉄フィンを巻き付けたフィンチューブ型または
鉄製チューブに鉄プレートフィンを圧入するフィンアン
ドチューブ型の構造のものとし、防食及び伝熱性等の向
上のために溶融金属亜鉛中にこれらを浸漬することで亜
鉛によって被覆した鉄製熱交換器とすることが主流であ
った。In the refrigeration cycle using the ammonia refrigerant, the copper-based material can be used for the fluorocarbon-based refrigerant but cannot be used because it is corroded by the ammonia refrigerant. Therefore, conventionally, a fin tube type in which iron fins are wound around the outer circumference of an iron tube or a fin-and-tube type structure in which iron plate fins are press-fitted into an iron tube is used, and in order to improve corrosion resistance and heat transfer, etc. It was the mainstream to make an iron heat exchanger coated with zinc by immersing them in the.
【０００４】[0004]
【発明が解決しようとする課題】ただこのようにして製
作された鉄製の大型熱交換器は非常に重くなるばかりで
なく、熱交換器自体の性能は従来の銅管製熱交換器に比
較して劣り、またコスト的に高いものになっていた。However, the large iron heat exchanger manufactured in this manner not only becomes very heavy, but the performance of the heat exchanger itself is higher than that of the conventional copper tube heat exchanger. It was inferior and costly.
【０００５】一方、アルミニウムを素材として使用した
アルミニウム製熱交換器はアンモニアとの腐食反応がな
いために材料として使用可能であるから、そのチューブ
のＵベンド接合は一部においてＴＩＧ（タングステンイ
ナートガス）溶接等により製作されてきた。しかしなが
ら、例えば海洋から捕獲された鮮魚類や塩分を含んだ冷
凍食品等を凍結する場合には、熱交換器が塩素イオンに
晒されるためにチューブ外面が腐食するという問題があ
った。また、野菜、果物等の保管用冷蔵倉庫では鮮度保
持のために０℃〜１０℃の温度で加湿されており、その
蒸発器は多湿状態の腐食され易い雰囲気に置かれている
から、チューブ外面の防食処理が必要であった。同様に
海浜地区に設置される冷蔵設備においても、屋外に設置
される凝縮器にあっては、そのチュ−ブ、フィンに堆積
する塩分によって腐蝕されるという問題があった。On the other hand, an aluminum heat exchanger using aluminum as a raw material can be used as a material because it does not have a corrosive reaction with ammonia. Therefore, the U-bend joint of the tube is partially TIG (tungsten inert gas) welded. Etc. have been produced. However, for example, when freezing fresh fish or salt-containing frozen foods captured from the ocean, there is a problem that the outer surface of the tube is corroded because the heat exchanger is exposed to chlorine ions. Also, in a refrigerated warehouse for storing vegetables, fruits, etc., the temperature is kept at 0 ° C to 10 ° C to maintain freshness, and the evaporator is placed in a humid and corrosive atmosphere. The anticorrosion treatment was required. Similarly, in the refrigeration equipment installed in the beach area, the condenser installed outdoors has a problem that it is corroded by the salt content accumulated on the tubes and fins.
【０００６】またチューブのＵベンド接合部について
は、ＴＩＧ溶接では溶接欠陥の完全回避が困難で、それ
は製品寿命とも関係する上に製作上の作業性にも問題が
あり、これらを解消できる接合法が望まれているのであ
る。Regarding the U-bend joint of the tube, it is difficult to completely avoid welding defects by TIG welding, which is related to the product life and also has a problem in workability in manufacturing. Is desired.
【０００７】更にインスタント冷凍食品の凍結処理に
は、−２５℃以下の低温となるように冷凍機を運転し、
その冷凍処理を終えると常温に戻される。それに伴って
蒸発熱交換器の表面は常温時には濡れた状態におかれ、
食品中の塩分の影響も加わってフィン表面には白色腐食
物が発生する。こうした冷凍運転、その停止による常温
への復帰等が繰り返されるとフィン表面に腐食生成物が
付着堆積し、その一部でも食品中に巻き込まれることに
なるのは好ましくはないから、フィン自体が腐食しない
ような耐食性の向上が求められているのである。Further, for freezing treatment of instant frozen foods, the refrigerator is operated at a low temperature of -25 ° C or lower,
When the freezing process is completed, the temperature is returned to room temperature. Along with that, the surface of the evaporative heat exchanger is kept wet at room temperature,
White corrosives are generated on the fin surface due to the influence of salt in food. When such freezing operation and returning to normal temperature due to its stop are repeated, it is not preferable that corrosion products adhere and accumulate on the fin surface and even a part of it is caught in the food, so the fin itself is corroded. There is a demand for improved corrosion resistance.
【０００８】このように大型冷凍機すなわちアンモニア
冷媒を使用する場合であっても、大型冷凍機には、チュ
ーブ及びＵベンド接合部の耐久性が高く、高熱性能、低
コスト、フィン表面における白色腐食物の発生防止等の
全ての点で対応できる大型熱交換器が求められているの
である。Even when a large refrigerator, that is, an ammonia refrigerant is used as described above, the large refrigerator has high durability of the tube and the U-bend joint, high thermal performance, low cost, and white corrosion on the fin surface. There is a need for a large heat exchanger that can handle all aspects of preventing the generation of objects.
【０００９】そこで本発明は叙上のような従来存した諸
事情に鑑み創出されたもので、冷媒管の表面をＪＩＳ規
格Ｈ４０８０−Ａ７０７２に規定するクラッド表面と
し、冷媒管に固着されるフィン材にはプレコートされた
電気絶縁層を形成することによって、フィン材表面の白
色腐食物の発生を防止し、従来から一般的に使用されて
きたフルオロカーボン系冷媒を使用せずにアンモニア冷
媒を使用するも、大気中または冷凍・冷蔵雰囲気中に存
する塩分によっても影響されず、それによる腐食進行も
なく、ひいては地球環境を保護し、食品への影響も低減
可能なものとした大型に構成可能なアンモニア冷媒冷凍
装置を提供することを目的とする。Therefore, the present invention has been made in view of the above existing circumstances, and the fin material fixed to the refrigerant pipe is formed by using the surface of the refrigerant pipe as a clad surface defined in JIS H4080-A7072. By forming a pre-coated electrical insulating layer on the surface of the fin material, white corrosion products on the surface of the fin material are prevented, and an ammonia refrigerant is used instead of the conventionally used fluorocarbon refrigerant. Ammonia refrigerant that can be constructed in a large size that is not affected by the salt content in the air or in the freezing / refrigerating atmosphere, does not cause corrosion progress, and thus protects the global environment and can reduce the effect on food. An object is to provide a refrigerating device.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、本発明においては、アンモニアを冷媒として使用す
るアンモニア冷媒冷凍装置において、母材をアルミニウ
ム製とし、外表面はＪＩＳ規格Ｈ４０８０（アルミニウ
ム及びアルミニウム合金継目無管）−Ａ７０７２（合金
番号）に規定するクラッド処理が施されることで保護被
覆層１Ａを形成した冷媒管１と、この冷媒管１が挿通固
着されるよう、ＪＩＳ規格Ｈ４０００（アルミニウム及
びアルミニウム合金の板及び条）−Ａ１０５０（合金番
号）または同じくＡ１１００（合金番号）に規定するア
ルミニウム材製で、表面に電気絶縁層２Ａがプレコート
されたフィン材２とから成る熱交換器を備えたことを特
徴するものである。電気絶縁層２Ａはアクリル系樹脂に
て形成することができる。またヘアピン状に折曲された
複数の隣接する冷媒管１相互を、Ｕ状に折曲されている
連結管３によって、その接合部分をＡｌ−Ｓｉ系ロウ材
４をフラックス材を介してトーチ５によってロウ付けす
ることで接合したものであり、フラックス材はフッ化物
系のものとすることができる。In order to achieve the above object, in the present invention, in an ammonia refrigerant refrigerating apparatus using ammonia as a refrigerant, the base material is made of aluminum, and the outer surface is JIS standard H4080 (aluminum and Aluminum alloy seamless pipe) -A7072 (alloy number) The refrigerant pipe 1 on which the protective coating layer 1A is formed by performing the clad treatment and JIS Standard H4000 (so that the refrigerant pipe 1 is inserted and fixed) Plates and strips of aluminum and aluminum alloy) -A heat exchanger comprising a fin material 2 made of an aluminum material specified in A1050 (alloy number) or A1100 (alloy number) and having an electric insulating layer 2A precoated on the surface thereof. It is characterized by having. The electric insulation layer 2A can be formed of acrylic resin. Further, a plurality of adjacent refrigerant tubes 1 bent in a hairpin shape are connected to each other by a connecting tube 3 bent in a U shape, and a joint portion thereof is connected to an Al-Si brazing material 4 and a torch 5 via a flux material. They are joined by brazing with, and the flux material can be made of fluoride.
【００１１】以上のように構成された本発明に係るアン
モニア冷媒冷凍装置にあって、冷媒管１の表面における
ＪＩＳ規格Ｈ４０８０−Ａ７０７２に規定するクラッド
処理の保護被覆層１Ａは、過剰に犠性防食層を消耗して
しまうことがなく、母材のアルミニウム材は十分に保護
される。また電気絶縁層２Ａによってプレコートされた
フィン材２は白色腐食物の発生を防止させ、冷媒管１の
保護被覆層１Ａと電気絶縁して犠牲防食層を長期に渡っ
て保護させる。冷媒管１と連結管３とは、Ａｌ−Ｓｉ系
ロウ材４のフッ化物系のフラックス材を介したトーチ５
による接合で、その接合状態は強固になり、腐食を生じ
させない。In the ammonia refrigerant refrigerating apparatus according to the present invention configured as described above, the protective coating layer 1A of the clad treatment defined in JIS H4080-A7072 on the surface of the refrigerant tube 1 is excessively sacrificial anticorrosion. The base aluminum material is well protected without wasting layers. Further, the fin material 2 pre-coated with the electric insulation layer 2A prevents the generation of white corrosive substances, and electrically insulates the protective coating layer 1A of the refrigerant tube 1 to protect the sacrificial anticorrosion layer for a long time. The refrigerant pipe 1 and the connecting pipe 3 are connected to the torch 5 through a fluoride-based flux material of the Al-Si brazing material 4.
With the joining by, the joining state becomes strong, and corrosion does not occur.
【００１２】[0012]
【発明の実施の形態】以下図面を参照して本発明におけ
る一実施の形態を説明するに、図において示される符号
１はアンモニア冷媒を流通させることで熱交換させるフ
ィンチューブ型のアルミニウム製熱交換器におけるヘア
ピン状に折曲加工された冷媒管であり、母材をアルミニ
ウム材製とし、外表面はＪＩＳ規格Ｈ４０８０（アルミ
ニウム及びアルミニウム合金継目無管）−Ａ７０７２
（合金番号）に規定するクラッド処理が施されることで
保護被覆層１Ａを形成してあり、外径は例えば１５．８
８ｍｍ、肉厚は例えば１．６ｍｍとしてある。この冷媒
管１自体は、この冷媒管１を挿通させる多数の挿通孔が
開穿されているプレス成形されたＪＩＳ規格Ｈ４０００
−Ａ１０５０（合金番号）または同じくＡ１１００（合
金番号）に規定するアルミニウム材製で、表面に電気絶
縁層２Ａがプレコートされたフィン材２に挿入されるよ
うにしてある。その挿入後ではマンドレル法または液圧
法を用いて冷媒管１が拡管されることによりフィン材２
としっかりと固着されることになって熱交換器が構成さ
れるものである。BEST MODE FOR CARRYING OUT THE INVENTION In the following, one embodiment of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 indicates a fin tube type aluminum heat exchanger for exchanging heat by circulating an ammonia refrigerant. It is a refrigerant pipe bent into a hairpin shape in a container, the base material is made of aluminum material, and the outer surface is JIS standard H4080 (aluminum and aluminum alloy seamless pipe) -A7072
The protective coating layer 1A is formed by performing the clad treatment specified in (alloy number), and the outer diameter is, for example, 15.8.
The thickness is 8 mm and the thickness is 1.6 mm, for example. The refrigerant tube 1 itself is a press-molded JIS standard H4000 in which a large number of insertion holes for inserting the refrigerant tube 1 are opened.
-A1050 (alloy number) or similarly made of an aluminum material specified by A1100 (alloy number), which is inserted into the fin material 2 having the surface pre-coated with the electric insulating layer 2A. After the insertion, the fin tube 2 is expanded by expanding the refrigerant tube 1 using the mandrel method or the hydraulic method.
The heat exchanger is firmly fixed to the heat exchanger.
【００１３】フィン材２表面のプレコートは、アクリル
系樹脂等によって形成されている電気絶縁層２Ａのもの
であり、この電気絶縁層２Ａによって冷媒管１の保護被
覆層１Ａとの間で電位差が発生しないようにしてある。The precoat on the surface of the fin material 2 is for the electric insulation layer 2A made of acrylic resin or the like, and this electric insulation layer 2A causes a potential difference with the protective coating layer 1A of the refrigerant tube 1. I try not to.
【００１４】なおフィン材２自体は、電気化学的防食か
らして冷媒管１における保護被覆層１Ａと同等ないし電
位の低い（卑な）材質によって形成される。すなわち保
護被覆層１Ａがアルミニウム素材等の電位が高い（貴
な）材料と接していると、材料間に発生する電位差のた
めに無駄に犠性防食層を消耗してしまうから、それを防
止するためである。また冷媒管１の露出面積がフィン材
２の面積よりも少ない場合には冷媒管１に電流集中があ
るために、過剰に保護被覆層１Ａ自体が消耗して長期に
冷媒管１の犠牲防食作用が得られなくなるからである。The fin material 2 itself is formed of a material having the same or a low electric potential (base) as the protective coating layer 1A of the refrigerant tube 1 in view of electrochemical corrosion protection. That is, when the protective coating layer 1A is in contact with a material having a high potential (noble) such as an aluminum material, the sacrificial anticorrosion layer is unnecessarily consumed due to the potential difference generated between the materials, which is prevented. This is because. Further, when the exposed area of the refrigerant pipe 1 is smaller than the area of the fin material 2, current concentration occurs in the refrigerant pipe 1, so that the protective coating layer 1A itself is excessively consumed and the sacrificial anticorrosive action of the refrigerant pipe 1 is prolonged. Is not obtained.
【００１５】また隣接する冷媒管１相互は、そのストレ
ートな先端部夫々が一部において拡開されるフレア加工
がなされ、その拡開部分に図２に示すようにＵ状に折曲
されているＵベント管と称される連結管３が隣接する冷
媒管１相互に跨って挿入されることで連通するよう連結
されるものであり、冷媒管１と連結管３とはフラックス
材を介してトーチ５によってロウ付けされるものとして
ある。すなわち冷媒管１と連結管３との接合にはＡｌ−
Ｓｉ系ロウ材４を使用するのであり、フラックス材はフ
ッ化物系のもので、ＡｌＦ3 とＫＦとの混合塩で主成分
がＫＡｌＦ4 あるいはＡｌＦ3 とＣｓＦとの混合塩で主
成分がＣｓＡｌＦ4 のいずれかまたは混合物が使用され
るのである。Further, the adjacent refrigerant tubes 1 are flared so that their straight tips are partially expanded, and the expanded portions are bent in a U shape as shown in FIG. A connecting pipe 3 referred to as a U-vent pipe is connected so as to communicate by being inserted across the adjacent refrigerant pipes 1. The refrigerant pipe 1 and the connecting pipe 3 are connected to each other by a torch via a flux material. 5 is to be brazed. That is, Al- is used for joining the refrigerant pipe 1 and the connecting pipe 3.
Since the Si-based brazing material 4 is used, the flux material is a fluoride-based material, and the mixed salt of AlF 3 and KF is the main component and the main component is KAlF 4 or the mixed salt of AlF 3 and CsF and the main component is CsAlF 4. Either of these or a mixture is used.
【００１６】次に冷媒管１に、電気絶縁層２Ａによって
プレコートされたフィン材２を固着した場合と、プレコ
ートされていないフィン材２を固着した場合との腐食機
構の相違を説明する。図３に示すように電気絶縁層２Ａ
によってプレコートされたフィン材２を冷媒管１に固着
した場合は、母材となる冷媒管１の心材はＪＩＳ規格Ｈ
４０８０−Ａ１１００または同じくＡ３００３（合金番
号）に規定するものであり、その皮材である保護被覆層
１ＡはＪＩＳ規格Ｈ４０８０−Ａ７０７２に規定するか
ら、各材料の電位はＪＩＳ規格Ｈ４０８０−Ａ１１００
に規定する心材は−０．７３Ｖ、同様にＪＩＳ規格Ｈ４
０８０−Ａ３００３に規定する心材は−０．７０Ｖ、Ｊ
ＩＳ規格Ｈ４０８０−Ａ７０７２に規定する電気絶縁層
２Ａでは−０．８８Ｖであり、これらの電位は２５℃の
５％ＮａＣｌ液中における飽和甘汞電極基準での測定値
である。この結果、心材がＪＩＳ規格Ｈ４０８０−Ａ３
００３に規定するものであると、ＪＩＳ規格Ｈ４０８０
−Ａ７０７２に規定する保護被覆層１Ａとの間にはΔ＝
０．１８Ｖの電位差が生じ、心材に孔食が発生すること
がない。このように電気絶縁層２Ａがプレコートされた
心材の場合には、フィン材２表面における腐食生成物の
発生は防止されるのである。なお図中符号Ｈは腐食穴で
ある。Next, the difference in corrosion mechanism between the case where the fin material 2 precoated with the electric insulating layer 2A is fixed and the case where the fin material 2 not precoated is fixed to the refrigerant pipe 1 will be described. As shown in FIG. 3, the electrical insulation layer 2A
When the fin material 2 precoated by the method is fixed to the refrigerant pipe 1, the core material of the refrigerant pipe 1 which is the base material is JIS standard H
4080-A1100 or similarly A3003 (alloy number), and the protective coating layer 1A which is the skin thereof is defined in JIS standard H4080-A7072, the potential of each material is JIS standard H4080-A1100.
The core material specified in 1. is -0.73V, similarly JIS standard H4
The core material specified in 080-A3003 is -0.70V, J
The electric insulating layer 2A specified in IS standard H4080-A7072 has a potential of −0.88 V, and these potentials are measured values in a 5% NaCl solution at 25 ° C. on the basis of a saturated sweet field electrode. As a result, the core material is JIS standard H4080-A3.
According to JIS standard H4080
-Δ707 between the protective coating layer 1A specified in A7072
A potential difference of 0.18 V is generated, and pitting does not occur in the core material. Thus, in the case of the core material pre-coated with the electric insulating layer 2A, generation of corrosion products on the surface of the fin material 2 is prevented. The symbol H in the figure is a corrosion hole.
【００１７】これに対し、図４に示すように電気絶縁層
２Ａがプレコートされていないフィン材２を冷媒管１に
固着した場合は、冷媒管１の表面における保護被覆層１
Ａでその犠性防食効果により貫通孔食は防止される。し
かしながら冷媒管１が犠牲防食する以前に、フィン材２
の電位が−０．７３Ｖで、接触しているＪＩＳ規格Ｈ４
０８０−Ａ７０７２に規定する保護被覆層１Ａが−０．
８８Ｖであるためこの間に電位差が生じ、冷媒管１にお
ける保護被覆層１Ａの大半は心材防食として作用するの
ではなく、比較的短期に有効犠性層を消耗してしまうこ
とになるのである。このため冷媒管１を犠牲防食する以
前に、防食寿命が短縮されてしまい、その腐食を進行さ
せてしまうのである。なお図中符号Ｃは腐食付着物であ
る。On the other hand, as shown in FIG. 4, when the fin material 2 not pre-coated with the electric insulation layer 2A is fixed to the refrigerant pipe 1, the protective coating layer 1 on the surface of the refrigerant pipe 1 is formed.
In A, through-pitting corrosion is prevented due to its sacrificial anticorrosion effect. However, before the sacrificial protection of the refrigerant pipe 1 is completed, the fin material 2
Has a potential of -0.73V and is in contact with JIS standard H4
The protective coating layer 1A specified in 080-A7072 is -0.
Since it is 88 V, a potential difference occurs during this period, and most of the protective coating layer 1A in the refrigerant tube 1 does not act as corrosion protection for the core material, but consumes the effective sacrificial layer in a relatively short period of time. For this reason, the anticorrosion life is shortened before the sacrificial anticorrosion of the refrigerant pipe 1, and the corrosion progresses. In addition, the symbol C in the figure is a corrosion deposit.
【００１８】[0018]
【発明の効果】本発明は以上のように構成されているた
めに、フィン材２表面の白色腐食物の発生を防止でき、
従来から一般的に使用されてきたフルオロカーボン系冷
媒を使用することなく、アンモニア冷媒を使用するも、
大気中または冷凍・冷蔵雰囲気中に存する塩分によって
も影響されず、それによる腐食進行も生じないのであ
り、ひいては地球環境を保護し、食品への影響も低減可
能なものとでき、大型の冷凍・冷却設備として十分に構
成可能なものとできる。Since the present invention is constructed as described above, it is possible to prevent the generation of white corrosive substances on the surface of the fin material 2.
Instead of using the fluorocarbon-based refrigerant that has been commonly used, ammonia gas refrigerant is used,
It is not affected by the salt content existing in the air or in the frozen / refrigerated atmosphere, and the corrosion does not progress due to it, which in turn protects the global environment and can reduce the impact on foods. The cooling equipment can be configured sufficiently.
【００１９】すなわちこれは本発明において、冷媒管１
の表面をＪＩＳ規格Ｈ４０８０−Ａ７０７２に規定する
クラッド処理された保護被覆層１Ａとし、冷媒管１に固
着されるフィン材２にはプレコートされた電気絶縁層２
Ａを形成したからであり、これによって、耐久性が高
く、熱性能に優れ、低コストであり、しかもフィン材２
の表面における白色腐食物発生防止が可能な安価な大型
熱交換器が得られるものである。That is, this is the refrigerant pipe 1 in the present invention.
The surface of is the clad-treated protective coating layer 1A defined in JIS H4080-A7072, and the fin material 2 fixed to the refrigerant tube 1 is pre-coated with the electrically insulating layer 2
This is because A is formed, so that the fin material 2 has high durability, excellent thermal performance, and low cost.
An inexpensive large-sized heat exchanger capable of preventing the generation of white corrosive substances on the surface of the is obtained.
【００２０】また冷媒管１の表面には、ＪＩＳ規格Ｈ４
０８０−Ａ７０７２に規定するクラッド処理の保護被覆
層１Ａが形成されているから、過剰に犠性防食層を消耗
してしまうことがないのであり、その母材でアルミニウ
ム材を十分に保護でき、フィン材２をプレコートしてい
る電気絶縁層２Ａによって白色腐食物の発生を防止で
き、冷媒管１の保護被覆層１Ａと電気絶縁して犠牲防食
層を長期に渡って保護させることができるのである。On the surface of the refrigerant pipe 1, JIS standard H4
Since the protective coating layer 1A for the clad treatment specified in 080-A7072 is formed, the sacrificial anticorrosive layer is not excessively consumed, and the base material can sufficiently protect the aluminum material, The electric insulating layer 2A pre-coated with the material 2 can prevent the generation of white corrosive substances, and can electrically insulate the protective coating layer 1A of the refrigerant tube 1 to protect the sacrificial anticorrosive layer for a long period of time.
【００２１】また冷媒管１と連結管３とは、トーチ５に
よるＡｌ−Ｓｉ系ロウ材４のフッ化物系のフラックス材
を介して接合してあるから、接合状態を強固にし、腐食
を生じさせないのである。Further, since the refrigerant pipe 1 and the connecting pipe 3 are joined by the torch 5 via the fluoride-based flux material of the Al-Si-based brazing material 4, the joined state is strengthened and corrosion is not caused. Of.
【図１】本発明の一実施の形態を示す熱交換器の要部に
おける一部の拡大図を含む正面図である。FIG. 1 is a front view including an enlarged view of a part of a main part of a heat exchanger according to an embodiment of the present invention.
【図２】同じく冷媒管と連結管との接合作業時における
正面図である。FIG. 2 is a front view of the refrigerant pipe and the connecting pipe at the time of joining work.
【図３】同じく本発明においての腐食機構を示す断面模
式図である。FIG. 3 is a schematic sectional view showing the corrosion mechanism of the present invention.
【図４】同じく比較例においての腐食機構を示す断面模
式図である。FIG. 4 is a schematic sectional view showing a corrosion mechanism in a comparative example.
１…冷媒管 １Ａ…保護被覆
層
２…フィン材 ２Ａ…電気絶縁
層
３…連結管 ４…Ａｌ−Ｓｉ
系ロウ材
５…トーチ
Ｃ…腐食付着物 Ｈ…腐食穴DESCRIPTION OF SYMBOLS 1 ... Refrigerant pipe 1A ... Protective coating layer 2 ... Fin material 2A ... Electrical insulating layer 3 ... Connection pipe 4 ... Al-Si
System brazing material 5 ... Torch C ... Corrosion deposits H ... Corrosion holes
Claims (4)
ニア冷媒冷凍装置において、母材をアルミニウム材製と
し、外表面はＪＩＳ規格Ｈ４０８０−Ａ７０７２に規定
するクラッド処理が施されることで保護被覆層を形成し
た冷媒管と、この冷媒管が挿通固着されるよう、ＪＩＳ
規格Ｈ４０００−Ａ１０５０または同じくＡ１１００に
規定するアルミニウム材製で、表面に電気絶縁層がプレ
コートされたフィン材とから成る熱交換器を備えたこと
を特徴とするアンモニア冷媒冷凍装置。1. An ammonia refrigerant refrigerating apparatus using ammonia as a refrigerant, the base material is made of aluminum material, and the outer surface is subjected to a clad treatment specified in JIS H4080-A7072 to form a protective coating layer. According to JIS, the refrigerant pipe and the refrigerant pipe are inserted and fixed.
An ammonia refrigerant refrigerating apparatus comprising a heat exchanger made of an aluminum material specified in the standard H4000-A1050 or A1100, and a fin material having an electric insulation layer precoated on the surface thereof.
る請求項１に記載のアンモニア冷媒冷凍装置。2. The ammonia refrigerant refrigerating apparatus according to claim 1, wherein the electric insulating layer is made of an acrylic resin.
ニア冷媒冷凍装置において、冷媒管をフィン材に挿通固
着すると共に、ヘアピン状に折曲された複数の隣接する
冷媒管相互を、Ｕ状に折曲されている連結管によって、
その接合部分をＡｌ−Ｓｉ系ロウ材をフラックス材を介
してトーチによってロウ付けすることで接合して成る熱
交換器を備えたことを特徴とするアンモニア冷媒冷凍装
置。3. An ammonia refrigerant refrigerating apparatus using ammonia as a refrigerant, wherein a refrigerant pipe is inserted and fixed to a fin member, and a plurality of adjacent hairpin-shaped refrigerant pipes are bent into a U shape. By connecting pipe
An ammonia-refrigerant refrigerating apparatus comprising a heat exchanger formed by joining the joined portions by brazing an Al-Si brazing material with a torch through a flux material.
ある請求項３に記載のアンモニア冷媒冷凍装置。4. The ammonia refrigerant refrigerating apparatus according to claim 3, wherein the flux material is of a fluoride type.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002118846A JP3650371B2 (en) | 2002-04-22 | 2002-04-22 | Ammonia refrigerant refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002118846A JP3650371B2 (en) | 2002-04-22 | 2002-04-22 | Ammonia refrigerant refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003314974A true JP2003314974A (en) | 2003-11-06 |
| JP3650371B2 JP3650371B2 (en) | 2005-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2002118846A Expired - Lifetime JP3650371B2 (en) | 2002-04-22 | 2002-04-22 | Ammonia refrigerant refrigeration equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101033470B1 (en) | 2010-07-26 | 2011-05-09 | 태성전기(주) | Heat exchange pipe manufacturing equipment for freezing cycle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014228235A (en) * | 2013-05-24 | 2014-12-08 | ホシザキ電機株式会社 | Heat exchanger and refrigerator using heat exchanger for condenser or evaporator |
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2002
- 2002-04-22 JP JP2002118846A patent/JP3650371B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101033470B1 (en) | 2010-07-26 | 2011-05-09 | 태성전기(주) | Heat exchange pipe manufacturing equipment for freezing cycle |
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| Publication number | Publication date |
|---|---|
| JP3650371B2 (en) | 2005-05-18 |
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