JP2645869B2 - Composition for absorption refrigerator - Google Patents
Composition for absorption refrigeratorInfo
- Publication number
- JP2645869B2 JP2645869B2 JP63252390A JP25239088A JP2645869B2 JP 2645869 B2 JP2645869 B2 JP 2645869B2 JP 63252390 A JP63252390 A JP 63252390A JP 25239088 A JP25239088 A JP 25239088A JP 2645869 B2 JP2645869 B2 JP 2645869B2
- Authority
- JP
- Japan
- Prior art keywords
- lithium
- absorption refrigerator
- composition
- lithium bromide
- solution
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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溶液と腐食抑制剤とを有した吸
収冷凍機用組成物に関する。The present invention relates to a composition for an absorption refrigerator having a lithium bromide solution and a corrosion inhibitor.
（ロ）従来の技術 例えば特開昭53−17589号公報には冷媒として水、吸
収剤として臭化リチウム（LiBr）溶液を用いた吸収冷凍
機が開示されており、腐食抑制剤としてモリブデン酸リ
チウムを溶液に添加した吸収冷凍機用組成物が存在して
いる。(B) Prior art For example, JP-A-53-17589 discloses an absorption refrigerator using water as a refrigerant and a lithium bromide (LiBr) solution as an absorbent, and lithium molybdate as a corrosion inhibitor. There is a composition for an absorption refrigerator in which is added to the solution.
（ハ）発明が解決しようとする課題 上記従来の吸収冷凍機用組成物において、腐食抑制剤
（M0O4 --）の濃度は臨界濃度以上でなければならず、腐
食抑制剤の濃度が臨界濃度以下の場合には、腐食抑制剤
は活発な復極材として作用し、腐食速度を増大させる虞
れがある。ここで、モリブデン酸リチウムの場合、溶解
度が低いため、臨界濃度以下（10-3〜10-4mol）になり
易い。このため、腐食抑制剤はその使用につれて吸収液
に鉄が溶解し、汚濁が発生して鉄等の水酸化物が析出
し、沈殿物が吸収冷凍機低温熱交換器、又は吸収液の散
布装置として用いられるトレイ内で詰まる虞れがあっ
た。(C) In the invention the problem above conventional absorption refrigeration composition to be solved, corrosion inhibitors (M 0 O 4 -) concentration must the critical concentration or more, the concentration of the corrosion inhibitor If the concentration is below the critical concentration, the corrosion inhibitor acts as an active reversing material, and may increase the corrosion rate. Here, in the case of lithium molybdate, since its solubility is low, it tends to be lower than the critical concentration (10 −3 to 10 −4 mol). Therefore, as the corrosion inhibitor is used, iron dissolves in the absorbing solution as it is used, polluting occurs, and hydroxides such as iron are precipitated, and the precipitate is absorbed in an absorption refrigerator, a low-temperature heat exchanger, or a device for spraying the absorbing solution. There is a risk of clogging in a tray used as a tray.
本発明は、上記従来技術の課題にかんがみてなされた
ものであり、腐食抑制剤としてモリブデン酸リチウムを
使用した場合の金属の腐食を防止し、吸収液中での沈殿
物の析出を極力防止することを目的とする。The present invention has been made in view of the above-mentioned problems of the related art, and prevents corrosion of a metal when lithium molybdate is used as a corrosion inhibitor, and prevents precipitation of a precipitate in an absorbing solution as much as possible. The purpose is to:
（ニ）課題を解決するための手段 本発明は上記課題を解決するために、吸収液として臭
化リチウム溶液を使用し、腐食抑制剤としてモリブデン
酸リチウムを使用した吸収冷凍機用組成物において、ホ
ウ素化合物を添加した吸収冷凍機用組成物を提供するも
のである。(D) Means for Solving the Problems In order to solve the above problems, the present invention provides a composition for an absorption refrigerator using a lithium bromide solution as an absorbing solution and lithium molybdate as a corrosion inhibitor. An object of the present invention is to provide a composition for an absorption refrigerator to which a boron compound has been added.
（ホ）作 用 本発明の吸収冷凍機用組成物にはホウ酸リチウム等の
ホウ素化合物が添加されているため、モリブデン酸リチ
ウムによる金属表面の不働態化皮膜の形成が促進され、
金属の溶解を防止でき、臭化リチウム溶液の汚濁、及び
沈殿物の発生を防止することが可能になり、又、モリブ
デン酸リチウムの臨界濃度以下の領域での金属表面の不
働態化皮膜の形成を助け、金属の腐食抑制を図ることが
可能になる。(E) Operation Since a boron compound such as lithium borate is added to the composition for an absorption refrigerator of the present invention, formation of a passivation film on a metal surface by lithium molybdate is promoted,
It is possible to prevent the dissolution of the metal, to prevent the contamination of the lithium bromide solution and the generation of a precipitate, and to form a passivation film on the metal surface in a region below the critical concentration of lithium molybdate. It is possible to suppress metal corrosion.
（ヘ）実施例 以下、本発明の一実施例を図面に基づいて詳細に説明
する。(F) Example Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
図において、（１），（２），（３），（４），
（５），（６），（７），（８），（９）はそれぞれ高
温発生器、低温発生器、凝縮器、蒸発器、吸収器、冷媒
ポンプ、吸収液ポンプ、高温熱交換器、低温熱交換器
で、それぞれが管路で接続されて冷媒〔水〕と吸収液
〔臭化リチウム溶液〕の循環路が形成されている。そし
て、臭化リチウム溶液中には腐食抑制剤としてモリブデ
ン酸リチウムが添加されている。In the figure, (1), (2), (3), (4),
(5), (6), (7), (8), and (9) are a high-temperature generator, a low-temperature generator, a condenser, an evaporator, an absorber, a refrigerant pump, an absorbent pump, a high-temperature heat exchanger, The low-temperature heat exchangers are connected by pipes to form a circulation path for the refrigerant [water] and the absorbing liquid [lithium bromide solution]. Then, lithium molybdate is added to the lithium bromide solution as a corrosion inhibitor.
以下、モリブデン酸リチウムの添加されている臭化リ
チウム水溶液にホウ酸リチウム（ホウ素化合物）を添加
して行った実験結果について説明する。第１表は実験の
ベースになった臭化リチウム水溶液の組成を示したもの
である。第２表は試験管に上記臭化リチウム水溶液を20
0℃容器に入れ、鉄片を浸漬し、さらに、ホウ酸リチウ
ムの粉末（Li2B4O7・3H2O）を添加せずに200時間加熱煮
沸させた場合（NO.1）と、ホウ酸リチウムを添加（ホウ
素の添加量は200PPM）し、200時間加熱煮沸させた場合
（NO.2）の実験結果を示したものである。ここで、臭化
リチウム水溶液を加熱する容器の上部には蒸発した冷媒
蒸気を凝縮させるための冷却器が設けられており、臭化
リチウム水溶液の濃度が吸収冷凍機の発生器内の臭化リ
チウム水溶液の濃度と略同一に保たれた。第２図に示し
たように、臭化リチウム水溶液にホウ酸リチウムを添加
することにより、臭化リチウム水溶液の汚濁が抑えら
れ、且つ、臭化リチウム水溶液への鉄の溶解が極く僅か
に抑えられ、鉄片の腐食が防止される。Hereinafter, the results of experiments performed by adding lithium borate (boron compound) to an aqueous solution of lithium bromide to which lithium molybdate has been added will be described. Table 1 shows the composition of the lithium bromide aqueous solution on which the experiment was based. Table 2 shows that 20 mL of the above aqueous solution of lithium bromide was placed in a test tube.
Placed in a 0 ℃ vessel was immersed iron, furthermore, if allowed to 200 hours under boiling without the addition of lithium borate powder (Li 2 B 4 O 7 · 3H 2 O) and (NO.1), boric This shows the experimental results when lithium oxide was added (the amount of boron added was 200 PPM) and the mixture was heated and boiled for 200 hours (NO.2). Here, a cooler for condensing the evaporated refrigerant vapor is provided at the upper part of the container for heating the lithium bromide aqueous solution, and the concentration of the lithium bromide aqueous solution is controlled by the concentration of the lithium bromide in the generator of the absorption refrigerator. The concentration of the aqueous solution was kept almost the same. As shown in FIG. 2, by adding lithium borate to the aqueous solution of lithium bromide, the contamination of the aqueous solution of lithium bromide is suppressed, and the dissolution of iron in the aqueous solution of lithium bromide is extremely suppressed. The corrosion of iron pieces is prevented.
上記実験結果のように臭化リチウム水溶液にホウ酸リ
チウムを添加することにより、モリブデン酸リチウムに
よる金属表面の不働態化皮膜形成が促進され、金属の腐
食を防止でき、臭化リチウム水溶液の汚濁及び沈殿物の
発生を抑えることができる。この結果、ホウ酸リチウム
が添加された臭化リチウム水溶液を吸収冷凍機に使用し
た場合には、金属の腐食を防止でき、析出物質による低
温熱交換器（９）又は吸収器（５）のトレイの詰まりを
回避でき、吸収冷凍機の冷凍能力を長期間にわたり良好
に保つことができる。又、モリブデン酸リチウムが臨界
濃度以下の場合にも、ホウ酸リチウムが加水分解し、吸
収液中に溶存酸素が存在し、吸収冷凍機の金属表面の不
働態化が助けられ、この結果、臨界濃度以下の場合にも
モリブデン酸リチウムの不働態化作用が保たれ、金属表
面の腐食抑制を図ることができる。 By adding lithium borate to the lithium bromide aqueous solution as in the above experimental results, the formation of a passivation film on the metal surface by lithium molybdate can be promoted, corrosion of the metal can be prevented, and contamination of the lithium bromide aqueous solution can be prevented. The generation of precipitate can be suppressed. As a result, when an aqueous solution of lithium bromide to which lithium borate is added is used for an absorption refrigerator, corrosion of metal can be prevented, and the tray of the low-temperature heat exchanger (9) or the absorber (5) due to the deposited substance can be prevented. Clogging can be avoided, and the refrigeration capacity of the absorption refrigerator can be kept good for a long period of time. Also, when lithium molybdate is below the critical concentration, lithium borate is hydrolyzed and dissolved oxygen is present in the absorbing solution, which helps passivation of the metal surface of the absorption refrigerator. Even when the concentration is not more than the concentration, the passivation effect of lithium molybdate is maintained, and corrosion of the metal surface can be suppressed.
（ト）発明の効果 上記本発明の吸収冷凍機用組成物によれば、ホウ素化
合物が吸収液に添加されているため、モリブデン酸リチ
ウムによる金属表面の不働態化皮膜の形成が促進され、
この結果金属の腐食を防止でき、又吸収液の汚濁、及び
沈殿物の発生を防止でき、この結果、吸収冷凍機の詰ま
りを回避して冷凍能力を長期間にわたり良好に保つこと
ができる。(G) Effect of the Invention According to the composition for an absorption refrigerator of the present invention, since a boron compound is added to the absorption liquid, formation of a passivation film on the metal surface by lithium molybdate is promoted,
As a result, corrosion of the metal can be prevented, and contamination of the absorbing solution and generation of sediment can be prevented. As a result, clogging of the absorption refrigerator can be avoided, and the refrigeration capacity can be kept good for a long period of time.
図面は本発明の一実施例を示す吸収冷凍機の回路構成図
である。The drawing is a circuit configuration diagram of an absorption refrigerator showing one embodiment of the present invention.
Claims (1)
腐食抑制剤としてモリブデン酸リチウムを使用した吸収
冷凍機用組成物において、ホウ素化合物を添加したこと
を特徴とする吸収冷凍機用組成物。1. A lithium bromide solution is used as an absorbing solution,
An absorption refrigerator composition using lithium molybdate as a corrosion inhibitor, wherein a boron compound is added to the composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63252390A JP2645869B2 (en) | 1988-10-06 | 1988-10-06 | Composition for absorption refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63252390A JP2645869B2 (en) | 1988-10-06 | 1988-10-06 | Composition for absorption refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02101352A JPH02101352A (en) | 1990-04-13 |
| JP2645869B2 true JP2645869B2 (en) | 1997-08-25 |
Family
ID=17236659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63252390A Expired - Fee Related JP2645869B2 (en) | 1988-10-06 | 1988-10-06 | Composition for absorption refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2645869B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0730969B2 (en) * | 1988-12-22 | 1995-04-10 | 株式会社日立製作所 | Absorption refrigerator and absorption liquid |
| US5547600A (en) * | 1995-05-05 | 1996-08-20 | Carrier Corporation | Absorption refrigeration system working fluid with molybdate, borate, silicate inhibitor blend |
-
1988
- 1988-10-06 JP JP63252390A patent/JP2645869B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02101352A (en) | 1990-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |