JPS5912251A - water heater - Google Patents
water heaterInfo
- Publication number
- JPS5912251A JPS5912251A JP57122306A JP12230682A JPS5912251A JP S5912251 A JPS5912251 A JP S5912251A JP 57122306 A JP57122306 A JP 57122306A JP 12230682 A JP12230682 A JP 12230682A JP S5912251 A JPS5912251 A JP S5912251A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- water heater
- alloy
- water
- secondary heat
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electroplating Methods And Accessories (AREA)
- Details Of Fluid Heaters (AREA)
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】
本発明は、都市ガス、液化ガスなどを熱源とする湯沸器
の熱交換器に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger for a water heater using city gas, liquefied gas, or the like as a heat source.
従来より、都市ガス、液化ガスなどを熱源とする湯沸器
では、熱効率が８０％前後である。しかし、最近の社会
情勢から省エネルギー、省資源である高効率形の湯沸器
の出現が望まれている。このため、従来の湯沸器では熱
交換器が一つであったが、燃焼排ガスの有効利用を図る
ため、燃焼排ガス後流部にさらに熱交換器を架設し、燃
焼排ガス中の潜熱を利用することによって熱効率を９０
％以上にすることが可能になる。Conventionally, water heaters that use city gas, liquefied gas, or the like as a heat source have a thermal efficiency of around 80%. However, due to recent social conditions, there is a desire for a highly efficient water heater that saves energy and resources. For this reason, conventional water heaters only have one heat exchanger, but in order to make effective use of the flue gas, we installed an additional heat exchanger downstream of the flue gas to utilize the latent heat in the flue gas. Thermal efficiency is increased to 90% by
% or more.
２ベーム゛
この高効率形湯沸器の概略を第１図に示す。この湯沸器
は、従来の湯沸器においても存在したバーナ直上の熱交
換器１（以下−次熱交換器と呼ぶ）と、燃焼排ガス後流
部に架設された熱交換器２（以下、二次熱交換器と呼ぶ
）およびガスバーナ３から構成されている。４は温湯取
り出し口、５は冷水導入口である。A schematic diagram of this high-efficiency water heater is shown in Figure 1. This water heater has a heat exchanger 1 directly above the burner (hereinafter referred to as the secondary heat exchanger), which was also present in conventional water heaters, and a heat exchanger 2 installed in the downstream part of the combustion exhaust gas (hereinafter referred to as the secondary heat exchanger). (referred to as a secondary heat exchanger) and a gas burner 3. 4 is a hot water outlet, and 5 is a cold water inlet.
二次熱交換器２を架設して燃焼排ガス中の潜熱を利用す
る第１図の湯沸器では、特に二次熱交換器２の表面で激
しい結露現象が生じる。この結露水には、ガス燃焼時に
発生する廃ガス成分である亜硝酸や亜硫酸などが溶解し
、酸性水溶液になる。In the water heater shown in FIG. 1 in which the secondary heat exchanger 2 is installed to utilize the latent heat in the combustion exhaust gas, severe dew condensation occurs particularly on the surface of the secondary heat exchanger 2. This dew condensation water dissolves waste gas components such as nitrous acid and sulfurous acid generated during gas combustion, and becomes an acidic aqueous solution.
従来より、熱交換器用表面処理材としてＰｂ−８ｎ系の
合金が用いられていた。しかし、高効率形湯沸器の二次
熱交換器２の表面では、前述のように酸性水溶液が生成
されるため、Ｐｂ−８ｎ系合金の表面処理材を用いると
著しく腐食される。Conventionally, Pb-8n alloys have been used as surface treatment materials for heat exchangers. However, since an acidic aqueous solution is generated on the surface of the secondary heat exchanger 2 of a high-efficiency water heater as described above, the use of a Pb-8n alloy surface treatment material causes significant corrosion.
また、−次熱交換器１では激しい結露現象による腐食が
生じないことがら、従来からの表面処理材であるＰｂ−
８ｎ系合金が用いられている。しか３ ・・
し、第１図の装置では、燃焼排ガスの後流部付近に配置
されている一次熱交換器１においても、バーナの点火お
よび消火時に僅かな結露現象が生じ腐食が進行し、腐食
生成物が出来る。この腐食生成物としては、塩基性炭酸
鉛、硝酸鉛および硫酸鉛などの鉛化合物が生成されてい
る。そして、第１図の湯沸器では、−成熱交換器表面で
生成された前述のような鉛化合物がガスバーナー燃焼時
に燃焼排ガス中に飛散し、二次熱交換器表面で生じる結
露水中に混入する。このため、通常結露水は酸性を呈す
ることから中和処理して機器外に排出するようになって
いる。しかし、結露水中に鉛化合物が混入すると、結露
水を中和処理して危険性を取り除いた状態で排出してい
るにもかかわらず。In addition, since corrosion due to severe dew condensation does not occur in the secondary heat exchanger 1, Pb-2, which is a conventional surface treatment material,
8n alloy is used. However, in the device shown in Fig. 1, even in the primary heat exchanger 1 located near the downstream part of the combustion exhaust gas, a slight condensation phenomenon occurs when the burner is ignited and extinguished, and corrosion progresses. Corrosion products are formed. Lead compounds such as basic lead carbonate, lead nitrate, and lead sulfate are produced as corrosion products. In the water heater shown in Figure 1, lead compounds such as those described above generated on the surface of the heat exchanger are scattered into the combustion exhaust gas during combustion by the gas burner, and are contained in the condensed water that forms on the surface of the secondary heat exchanger. Mixed. For this reason, since dew condensation water is usually acidic, it is neutralized and then discharged from the equipment. However, if lead compounds are mixed into the condensed water, even though the condensed water is neutralized and discharged to remove any danger.
鉛という有害元素を含んだ状態になっており、公害防止
という観点からは望ましくない。It contains lead, a harmful element, which is undesirable from the perspective of pollution prevention.
このように、第１図のような高効率湯沸器の一次熱交換
器に鉛系の表面処理材を使用すると、この表面処理材の
存在によっても二次熱交換器表面で生成される結露水中
に必ず鉛化合物が含まれることになる。In this way, when a lead-based surface treatment material is used in the primary heat exchanger of a high-efficiency water heater as shown in Figure 1, the presence of this surface treatment material also causes condensation to form on the surface of the secondary heat exchanger. There will always be lead compounds in the water.
本発明は、かかる問題の検討に鑑みてなされたもので、
熱交換器用の表面処理材として５ｎ−Ｂｉ系合金を用い
ることによって、結露水中に有害物質の混入を防止する
ものである。すなわち、本発明は、高効率形湯沸器の熱
交換器の表面処理材として５ｎ−Ｂｉ系合金を用いるこ
とによって、熱交換器の耐食性向上を図るとともに、結
露水中への有害物質の混入を防止するものである。The present invention was made in consideration of such problems, and
By using a 5n-Bi alloy as a surface treatment material for a heat exchanger, it is possible to prevent harmful substances from being mixed into condensed water. That is, the present invention improves the corrosion resistance of the heat exchanger by using a 5n-Bi alloy as a surface treatment material for the heat exchanger of a high-efficiency water heater, and also prevents harmful substances from being mixed into condensed water. It is intended to prevent
第２図は、５ｎ−Ｂｉ系合金と従来のＰｂ−８ｎ系合金
について、第１図のような高効率形湯沸器の二次熱交換
器表面で生成する結露水中に浸漬した場合の腐食減量を
比較したものである。ここで５ｎ−Ｂｉ系合金にはＢｉ
含含量５量量係ものを用いた。Figure 2 shows the corrosion of a 5n-Bi alloy and a conventional Pb-8n alloy when they are immersed in dew condensation water that forms on the surface of the secondary heat exchanger of a high-efficiency water heater as shown in Figure 1. This is a comparison of weight loss. Here, the 5n-Bi alloy has Bi
A material with a content of 5 quantities was used.
第３図はＢｉ含量の異なる５ｎ−Ｂｉ系合金についての
腐食減量を比較したものである。５ｎ−Ｂｉ系合金とし
ては、Ｂｉ含量が大きくなると腐食しガ
５ｎ−Ｂｉ系合金は、また、熱交換器の素材である銅と
の反応性がよく、銅と錫との合金を表面処理材と素材と
の境界に容易につくり、従ってｐｂ−８ｎ系合金より密
着性にすぐれるという利点もある。FIG. 3 compares the corrosion weight loss of 5n-Bi alloys having different Bi contents. 5n-Bi alloys corrode when the Bi content increases. 5n-Bi alloys also have good reactivity with copper, which is the material for heat exchangers, and are used as surface treatment materials for alloys of copper and tin. It also has the advantage that it can be easily formed at the boundary between the material and the material, and therefore has better adhesion than the pb-8n alloy.
このように、８ｎ−Ｂｉ系合金よりなる表面処理材を二
次熱交換器の表面に被覆することにより、耐食性が優れ
耐久性の向上が可能となる。さらに−次熱交換器にも５
ｎ−Ｂｉ系合金を被覆することによって、二次熱交換器
表面で生成される結露水中に有害物質が混入しないため
、生成された酸性結露水は中和処理するのみで排水する
ことができる。In this way, by coating the surface of the secondary heat exchanger with the surface treatment material made of the 8n-Bi alloy, it is possible to have excellent corrosion resistance and improve durability. Furthermore - 5 for the secondary heat exchanger
By coating with the n-Bi alloy, no harmful substances are mixed into the condensed water generated on the surface of the secondary heat exchanger, so that the generated acidic condensed water can be drained only by neutralization.
以上のように、本発明によれば、排ガスの後流部に設置
された熱交換器の腐食を防止でき、結露水中への有害物
質の混入をなくすることが可能となる。As described above, according to the present invention, it is possible to prevent corrosion of the heat exchanger installed in the downstream part of exhaust gas, and it is possible to eliminate the mixing of harmful substances into dew condensation water.
第１図は高効率形湯沸器の概略正面図、第２図は表面処
理材の耐食性の比較を示す図、第３図は６ページ
５ｎ−Ｂｉ系合金の耐食性を示す図である。
１・・・・・・−次熱交換器、２・・・・・・二次熱交
換器、３・・・・・・ガスバーナー。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
２
＠２図
（−５１四虻、天トζン（Ｅ辻ξ・σ手へｌ （Ｈ））
第３図
船館永凌ぜき時間（Ｈ＞）FIG. 1 is a schematic front view of a high-efficiency water heater, FIG. 2 is a diagram showing a comparison of the corrosion resistance of surface-treated materials, and FIG. 3 is a diagram showing the corrosion resistance of a 5n-Bi alloy on page 6. 1...-Secondary heat exchanger, 2...Secondary heat exchanger, 3...Gas burner. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 @Figure 2 (-51 four, Tenton ζ (E Tsuji ξ, σ hand (H))
Figure 3 Funatate Eiyo Zeki Time (H>)
Claims (1)
ｎ−Ｂｉ系合金で被覆してなる湯沸器。 に））前記５ｎ−Ｂｉ系合金（７）Ｂｉ含有量が０．１
〜４０重量％である特許請求の範囲第１項記載の湯沸器
。[Claims] 0) The surface of the heat exchanger installed at the downstream part of the combustion exhaust gas is
A water heater coated with an n-Bi alloy. )) The 5n-Bi alloy (7) Bi content is 0.1
The water heater according to claim 1, wherein the content is 40% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57122306A JPS5912251A (en) | 1982-07-13 | 1982-07-13 | water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57122306A JPS5912251A (en) | 1982-07-13 | 1982-07-13 | water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5912251A true JPS5912251A (en) | 1984-01-21 |
| JPS634097B2 JPS634097B2 (en) | 1988-01-27 |
Family
ID=14832687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57122306A Granted JPS5912251A (en) | 1982-07-13 | 1982-07-13 | water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5912251A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486725A (en) * | 2013-10-21 | 2014-01-01 | 郭昌平 | Novel energy-saving fuel gas water heating device |
-
1982
- 1982-07-13 JP JP57122306A patent/JPS5912251A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486725A (en) * | 2013-10-21 | 2014-01-01 | 郭昌平 | Novel energy-saving fuel gas water heating device |
| CN103486725B (en) * | 2013-10-21 | 2015-09-02 | 郭昌平 | A kind of New energy-conserving fuel gas hot water apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS634097B2 (en) | 1988-01-27 |
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