JPS61110861A - Heat exchanger for absorption refrigerator - Google Patents
Heat exchanger for absorption refrigeratorInfo
- Publication number
- JPS61110861A JPS61110861A JP23055984A JP23055984A JPS61110861A JP S61110861 A JPS61110861 A JP S61110861A JP 23055984 A JP23055984 A JP 23055984A JP 23055984 A JP23055984 A JP 23055984A JP S61110861 A JPS61110861 A JP S61110861A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- stainless steel
- absorption refrigerator
- brazing
- joints
- 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は臭化リチウ・ム水溶液や塩化カリウム水溶液な
どの塩類溶液を吸収液に用いる吸収冷凍機、吸収ヒート
ポンプあるいは吸収冷温水機（以下、この種の吸収冷凍
機という）用の熱交換器の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is applicable to absorption refrigerators, absorption heat pumps, or absorption chiller-heaters (hereinafter referred to as , this type of absorption refrigerator).
（ロ）従来の技術
この種の吸収冷凍機用熱交換器は、臭化リチウム水溶液
によって腐食されやすいため、その部材に耐食性の秀れ
たステンレス鋼を用いて製作されることか多い。そして
、このステンレス鋼部材間の接合（例えば、熱交換器の
ステンレス鋼製管板とステンレス鋼製伝熱管との接合や
ステンレス鋼製平板間の接合など）は、従来、特公昭５
５−４８９０８号公報、特公昭５７−２１４１６号公報
、実開昭５３−８６６４８号公報などにみられるように
、銅ろう付けもしくはＴＩＧ溶接、シーム溶接などの溶
接でなされたり、あるいはバクキングを介して重ね合わ
せる等の成形によってなされている。(b) Prior Art This type of heat exchanger for an absorption refrigerator is easily corroded by an aqueous lithium bromide solution, so its members are often manufactured using stainless steel, which has excellent corrosion resistance. The bonding between these stainless steel members (for example, the bonding between a stainless steel tube sheet and a stainless steel heat exchanger tube of a heat exchanger, the bonding between stainless steel flat plates, etc.) has been conventionally
As seen in Japanese Patent Publication No. 5-48908, Japanese Patent Publication No. 57-21416, Japanese Utility Model Publication No. 53-86648, etc., it is done by copper brazing, TIG welding, seam welding, etc., or through backking. It is made by forming such as overlapping.
（ハ）発明が解決しようとする問題点
吸収冷凍機用熱交換器のステンレス鋼部材間を銅ろう付
けや溶接により接合する従来の技術においては、その接
合部が吸収液（臭化リチウム水溶液）によって腐食され
やすいため、熱交換器の耐久性に劣るという欠点を有し
ていた。また、バクキングを介してステンレス鋼製の平
板を重ね合わせる従来の技術においては、重ね合わせ部
に隙間腐食を生じやすく、かつ、吸収冷凍機用熱交換器
上しての気密性に劣る欠点があった。(c) Problems to be solved by the invention In the conventional technology of joining the stainless steel members of the heat exchanger for absorption refrigerators by copper brazing or welding, the joints are filled with an absorbing liquid (lithium bromide aqueous solution). Since it is easily corroded by heat exchangers, it has the disadvantage of being inferior in durability. In addition, the conventional technique of overlapping stainless steel flat plates through backking tends to cause crevice corrosion in the overlapped parts, and has the drawback of poor airtightness over the heat exchanger for absorption refrigerators. Ta.
本発明ぼ、このような問題点に鑑み、気密性および耐久
性に秀れたこの種の吸収冷凍機用熱交換器の提供を目的
としたものである。In view of these problems, the present invention aims to provide a heat exchanger for an absorption refrigerator of this type that is excellent in airtightness and durability.
に）問題点を解決するためのチ段
本発明は、上記の問題点を解決する手段として、この種
の吸収冷凍機用熱交換器のステンレス鋼部材間の接合部
をＪＩＳ規格によるＢＮｉ−５（１８，０〜２０．０％
のクロム、９．７５〜１０．５％のシリコンおよび０．
１５％以下の炭素を含有する耐熱性ニッケルろ５）でろ
う付けする構成としたものである。2) Steps to Solve the Problems The present invention, as a means to solve the above problems, is directed to the joints between the stainless steel members of this type of absorption chiller heat exchanger using BNi-5 according to the JIS standard. (18.0~20.0%
of chromium, 9.75-10.5% silicon and 0.
It is configured to be brazed with a heat-resistant nickel filter 5) containing 15% or less of carbon.
（ホ）作用
本発明による熱交換器においては、そのステンレス鋼部
材間の接合部におけるＢＮｉ−５（ろう）の濡れ性が良
好であり、かつまた、ステンレス鋼部材とＢ Ｎ ｉ
−５とのろう付ゆ′によって形成される合金部が塩類溶
液（臭化リチウム水浴液）に対する耐食性に秀れた機能
（作用）をもつことも実験で確認された。(E) Function In the heat exchanger according to the present invention, the wettability of BNi-5 (wax) at the joint between the stainless steel members is good, and the stainless steel member and the BNi
It was also confirmed through experiments that the alloy part formed by brazing with -5 has excellent corrosion resistance against salt solutions (lithium bromide water bath).
また、合金部には脆い相が形成されないことも確認され
た。It was also confirmed that no brittle phase was formed in the alloy part.
このように、ステンレス鋼部材間の接合部が、良好にろ
う付ゆされ、かつ、塩類溶液によって腐食されるおそれ
も少なく、また、ろう付は時に割れることもないので、
本発明によれば気密性および耐久性に秀れたこの種の吸
収冷凍機用熱交換器を得ることができる。In this way, the joints between stainless steel members are well brazed, and there is little risk of corrosion from salt solutions, and the brazing does not sometimes crack.
According to the present invention, it is possible to obtain this type of heat exchanger for an absorption refrigerator that is excellent in airtightness and durability.
（へ）実施例
第１図は、本発明によるこの種の吸収冷凍機用熱交換器
の一実施例を示した概略構成図で、溶液熱交換器用のシ
ェルアンドチューブ型式熱交換器の一部切欠断面図を示
したものである。第１図において、（１）、（１１・・
・は高温の吸収液が流通するステンレス鋼製の伝熱管、
（２）、（２）はステンレス鋼製の管板、（３）、（４
）は低温の吸収液の出入口用の管、（５）は出口側ヘッ
ダー、（６）は入口側ヘソグー、（７）、（８）は高温
の吸収液の出入口用の管であり、（９）、（９）・・・
は管板（２）、（２）と伝熱管（１）、（１）・・・間
の接合部におけるろう付は部である。(F) Embodiment Figure 1 is a schematic diagram showing an embodiment of this type of heat exchanger for an absorption refrigerator according to the present invention, and is a part of a shell-and-tube type heat exchanger for a solution heat exchanger. It shows a cutaway sectional view. In Figure 1, (1), (11...
- is a stainless steel heat transfer tube through which high-temperature absorption liquid flows;
(2), (2) are stainless steel tube sheets, (3), (4
) is the pipe for the inlet and outlet of the low temperature absorption liquid, (5) is the outlet side header, (6) is the header on the inlet side, (7) and (8) are the pipes for the inlet and outlet of the high temperature absorption liquid, (9 ), (9)...
is the brazing at the joints between the tube sheets (2), (2) and the heat exchanger tubes (1), (1)...
また、第２図は本発明による吸収冷凍機用熱交換器の他
の実施例を示す図であり、溶液熱交換器や吸収器や発生
器などに用いる熱交換器の要部切欠断面を示した概略構
成説明図である。第２図において、α０、ｅｌｌ・・・
はステンレス鋼製のプレートであり、αυ、（１１１・
・・はこれらプレート（１１，（ＩＣｊ・・・を重ね合
わせた接合部におけるろう付は部である。Further, FIG. 2 is a diagram showing another embodiment of the heat exchanger for an absorption refrigerator according to the present invention, and shows a cutaway cross section of the main part of the heat exchanger used for a solution heat exchanger, an absorber, a generator, etc. FIG. 2 is a schematic configuration explanatory diagram. In Fig. 2, α0, ell...
is a stainless steel plate, αυ, (111・
. . . indicates the brazing at the joint where these plates (11, (ICj . . . ) are overlapped.
そして、これら熱交換器のステンレス鋼部材の接合部は
ＪＩＳ規格によるＢＮｉ−５を用いてろう付けされてい
る。The joints of the stainless steel members of these heat exchangers are brazed using BNi-5 according to the JIS standard.
次に、これら熱交換器のステンレス鋼部材の接合部にお
けるろう付は方法の一例を簡単に説明する。Next, an example of a method for brazing the joints of stainless steel members of these heat exchangers will be briefly explained.
先ス、ペースト状のＢＮｉ−５をステンレス鋼部材の接
合部に塗布し、これを水素ガスやアンモニア分解ガスで
成る還元性雰囲気炉において、所定温度で所定の時間、
炉中ろう付けを行なった後、炉から取出して大気中にて
常温になるまで冷却することによってろう付けが完了す
る。なお、真空雰囲気炉中でろう付けすることも可能で
ある。First, paste-like BNi-5 is applied to the joints of stainless steel parts, and it is heated at a predetermined temperature for a predetermined time in a reducing atmosphere furnace containing hydrogen gas or ammonia decomposition gas.
After performing furnace brazing, the material is taken out from the furnace and cooled to room temperature in the atmosphere, thereby completing the brazing. Note that brazing can also be performed in a vacuum atmosphere furnace.
下記９表は、上記のようにしてろう付けを行なつたもの
のテスト結果を示したもので、ろうにはＪＩＳ規格によ
るＢＮｉ−２、ＢＮｉ−４、ＢＮｉ−５、Ｂ Ｎ ｉ
−６およびＢ Ｎ ｉ −７を用いたもので、これらろ
５付は部のろう付は時における割れの有無および臭化リ
チウム水溶液中での腐食の有無を試験した結果の表であ
る。なお、腐食テストにおいては温度１７５℃、濃度５
５％の臭化リチウム水溶液中にろう付は部を１０００時
間浸した場合の結果を示している。Table 9 below shows the test results of brazing performed as described above.
-6 and B N i -7, and the table shows the results of tests for the presence or absence of cracks during brazing of these filter parts and the presence or absence of corrosion in a lithium bromide aqueous solution. In addition, in the corrosion test, the temperature was 175℃ and the concentration was 5.
The results are shown when the brazing part was immersed in a 5% lithium bromide aqueous solution for 1000 hours.
上記の表から、ろうにはＢＮｉ−５を用いれば良いこと
が分かる。なお、テストの結果、ＢＮｉ−６およびＢＮ
ｉ−７を用いた場合にはろう付け部にニッケルとリンと
の化合物による脆い相が形成されるため割れを生じるこ
とが確認され、また、ＢＮｉ−２およびＢ Ｎ ｉ −
４を用いた場合にはろう付は部にポロンとクロムとの化
合物が形成され、これが臭化リチウム水溶液によって腐
食されることも確認された。From the table above, it can be seen that BNi-5 may be used as the solder. In addition, as a result of the test, BNi-6 and BN
It has been confirmed that when BNi-7 is used, cracks occur due to the formation of a brittle phase due to a compound of nickel and phosphorus in the brazed part, and BNi-2 and BN i -
It was also confirmed that when No. 4 was used, a compound of poron and chromium was formed in the brazing part, and this was corroded by the lithium bromide aqueous solution.
なおまた、ろうには銀ろうや銅ろうを用いることも考え
られるものの、銀ろうな用いた場合には高価となる難点
があり、また、銅ろうを用いた場合にはろう付は部にお
いて電位差腐食を起こす欠点がある。それ故、これらの
ろうは好適ではない。Furthermore, although it is possible to use silver solder or copper solder as the solder, there is a drawback in that it is expensive when using silver solder, and when using copper solder, brazing is caused by the potential difference at the parts. It has the disadvantage of causing corrosion. These waxes are therefore not suitable.
このように、市販されている安価なりＮｉ−５を用いて
ステンレス鋼部材間の接合部をろう付けした熱交換器は
、ろう付は部の割れがないことと、ろう付は部が臭化リ
チウム水溶液によってほとんど腐食されないことと併せ
て、ＢＮｉ−５のステンレス鋼に対する濡れ性〔親和性
〕が秀れているので、接合部での隙間腐食も防止され、
この種の吸収冷凍機用熱交換器として好適である。In this way, a heat exchanger in which the joints between stainless steel members are brazed using commercially available inexpensive Ni-5 has the advantage that there is no cracking in the brazed parts, and that the brazed parts are free from bromination. In addition to being hardly corroded by lithium aqueous solutions, BNi-5 has excellent wettability (affinity) for stainless steel, which prevents crevice corrosion at joints.
It is suitable as a heat exchanger for this type of absorption refrigerator.
（ト）発明の効果
以上のように、本発明の熱交換器は、そのステンレス鋼
部材間の接合部をＪＩＳ規格によるＢＮｉ−５でろう付
けしたものであるから、接合部（ろう付は部）の塩類溶
液に対する耐食性に秀れ、かつ、接合部（ろう付は部）
のろうの濡れも良く、接合部（ろう付は部）に割れを起
こすこともほとんどなく、安価で耐久性、気密性に秀れ
たこの種の吸収冷凍機用熱交換器として実用的価値の高
いものである。(g) Effects of the invention As described above, in the heat exchanger of the present invention, the joints between the stainless steel members are brazed with BNi-5 according to the JIS standard. ) has excellent corrosion resistance against salt solutions, and the joints (brazed parts)
It has good wettability and almost no cracking at joints (brazed parts), and is of practical value as a heat exchanger for this type of absorption refrigerator that is inexpensive, durable, and airtight. It's expensive.
第１図は本発明によるこの種の吸収冷凍機用熱交換器の
一実施例の概略構成を示した一部切欠断面図、第２図は
本発明による熱交換器の他の実施例の要部切欠断面図で
ある。
（１）・・・伝熱管、 （２）・・・管板、 （９）・
・・ろう付は部、αト・・プレート、 （１１）・・・
ろう付は部。FIG. 1 is a partially cutaway sectional view showing a schematic configuration of one embodiment of this type of heat exchanger for an absorption refrigerator according to the present invention, and FIG. 2 is a schematic diagram of another embodiment of the heat exchanger according to the present invention. FIG. (1)... Heat exchanger tube, (2)... Tube plate, (9)...
... Brazing is part, α... plate, (11)...
Brazing is the department.
Claims (1)
用いる吸収冷凍機の熱交換器におけるステンレス鋼部材
間の接合部を１８．０〜２０．０％のクロム、９．７５
〜１０．５％のシリコンおよび０．１５％以下の炭素の
含まれているニッケルろうによりろう付けして成る吸収
冷凍機用熱交換器。(1) The joints between stainless steel members in the heat exchanger of an absorption refrigerator that uses lithium bromide aqueous solution or other salt solution as the absorption liquid are made of 18.0 to 20.0% chromium, 9.75%
A heat exchanger for an absorption refrigerator brazed with nickel solder containing ~10.5% silicon and 0.15% or less carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23055984A JPS61110861A (en) | 1984-11-01 | 1984-11-01 | Heat exchanger for absorption refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23055984A JPS61110861A (en) | 1984-11-01 | 1984-11-01 | Heat exchanger for absorption refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61110861A true JPS61110861A (en) | 1986-05-29 |
Family
ID=16909650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23055984A Pending JPS61110861A (en) | 1984-11-01 | 1984-11-01 | Heat exchanger for absorption refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61110861A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63273767A (en) * | 1987-05-06 | 1988-11-10 | 三洋電機株式会社 | Plate type heat exchanger for absorption type water heater and chiller |
| JP2005030673A (en) * | 2003-07-11 | 2005-02-03 | Mayekawa Mfg Co Ltd | Heat exchanger and manufacturing method therefor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911746A (en) * | 1972-05-15 | 1974-02-01 |
-
1984
- 1984-11-01 JP JP23055984A patent/JPS61110861A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911746A (en) * | 1972-05-15 | 1974-02-01 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63273767A (en) * | 1987-05-06 | 1988-11-10 | 三洋電機株式会社 | Plate type heat exchanger for absorption type water heater and chiller |
| JP2005030673A (en) * | 2003-07-11 | 2005-02-03 | Mayekawa Mfg Co Ltd | Heat exchanger and manufacturing method therefor |
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