JPH02309153A - Hot water supply device - Google Patents
Hot water supply deviceInfo
- Publication number
- JPH02309153A JPH02309153A JP1127792A JP12779289A JPH02309153A JP H02309153 A JPH02309153 A JP H02309153A JP 1127792 A JP1127792 A JP 1127792A JP 12779289 A JP12779289 A JP 12779289A JP H02309153 A JPH02309153 A JP H02309153A
- Authority
- JP
- Japan
- Prior art keywords
- water
- heat exchanger
- water pipes
- generated
- stainless steel
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 8
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 239000010935 stainless steel Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 229910001566 austenite Inorganic materials 0.000 abstract 2
- 239000000126 substance Substances 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000010949 copper Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はガスを熱源とする給湯器、特に、大能力から小
能力までの給湯を１台の給湯器で行なう給湯器に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water heater that uses gas as a heat source, and particularly to a water heater that supplies hot water from a large capacity to a small capacity with a single water heater.
大能力から小能力までの給湯を行なう給湯器の一例を第
４図について説明する。An example of a water heater that supplies hot water from a large capacity to a small capacity will be explained with reference to FIG.
第４図において、１は給水管、２はその給水管の途中に
配設した流水スイッチ、３は燃焼胴、４は熱交換器、５
は出湯管、６はバーナ、７は比例制御弁、８はガス電磁
弁、９はファンを示し、図示を省略したコントローラに
より所望の能力（号数）を設定した後例えば給湯栓（図
示していない）を開くと１図示を省略したマイコン制御
部により比例制御弁７およびファン９を設定能力で給湯
し得るように制御して給湯するように構成されている。In Fig. 4, 1 is a water supply pipe, 2 is a water switch installed in the middle of the water supply pipe, 3 is a combustion shell, 4 is a heat exchanger, and 5 is a water supply pipe.
1 indicates a hot water outlet pipe, 6 indicates a burner, 7 indicates a proportional control valve, 8 indicates a gas solenoid valve, and 9 indicates a fan. After setting the desired capacity (number) using a controller (not shown), for example, a hot water tap (not shown) is set. When the opening (not shown) is opened, a microcomputer control section (not shown) controls the proportional control valve 7 and the fan 9 to supply hot water at a set capacity.
ところで、従来の給湯器は、熱効率および加工性などの
点から熱交換器および燃焼胴を脱酸銅で構成している。By the way, in conventional water heaters, the heat exchanger and combustion shell are made of deoxidized copper from the viewpoint of thermal efficiency and workability.
ところが、大能力から小能力までの給湯を１台の給湯器
で行なう給湯器においては、その能力比が例えば４〜５
倍となっており、小能力給湯の場合、熱交換器の伝熱面
積が相対的に過剰となって排気ガス中の水の露点温度よ
り低い部分が生じ、熱交換器の表面に凝縮水が生成する
。この凝縮水中には排気ガス中のＮＯｘ、ＳＯｘ成分が
溶解し、亜硝酸、硝酸、硫酸などの酸′性水となるため
、素材である銅が腐蝕を受け、腐蝕生成物（例えば、Ｃ
ｕ Ｓ○ａ ｒ ＣＩＪ（ＯＨ）２ ＋ Ｃｕ（Ｎ ０
ａ）ｚ） を生成し、熱交換器のフィンブロックを狭
め、熱効率の低下や不燃焼を引きおこすという問題があ
る。However, in a water heater that supplies hot water from large capacity to small capacity with one water heater, the capacity ratio is, for example, 4 to 5.
In the case of small-capacity hot water supply, the heat transfer area of the heat exchanger becomes relatively excessive, creating a portion whose temperature is lower than the dew point temperature of the water in the exhaust gas, and condensed water forms on the surface of the heat exchanger. generate. This condensed water dissolves NOx and SOx components in the exhaust gas, forming acidic water such as nitrous acid, nitric acid, and sulfuric acid, which causes corrosion of the copper material and produces corrosion products (such as carbon dioxide).
u S○a r CIJ(OH)2 + Cu(N 0
There is a problem in that it generates a)z), narrows the fin block of the heat exchanger, and causes a decrease in thermal efficiency and non-combustion.
さらに、最近の給湯器はコンパクト化が要求されており
、このため熱交換器内の水管の単位長さく１ｍ）あたり
の熱吸収量は従来は１０，０００ｋｃａｆＬ／ｈ程度で
あったものが２０，０００〜２５，０００ｋｃａＱ／ｈ
となって給湯オン・オフ時の熱応力が高まり、給湯オン
・オフの繰返しにより鋼管が金属疲労を生じ、亀裂に至
るという問題がある。Furthermore, recent water heaters are required to be more compact, and for this reason, the amount of heat absorbed per unit length (1 m) of water pipes in the heat exchanger has decreased from 10,000 kcafL/h to 20,000 kcafL/h. 000~25,000kcaQ/h
As a result, thermal stress increases when the hot water supply is turned on and off, and the repeated turning on and off of the hot water supply causes metal fatigue in the steel pipes, leading to cracks.
本発明は、前記の如き従来技術の問題点を改善し、排気
ガスの成分を含む凝縮水に対して耐蝕性を有すると共に
、金属疲労による亀裂が生じにくいようにして耐久性を
向上させることができる給湯器を提供せんとするもので
ある。The present invention improves the problems of the prior art as described above, has corrosion resistance against condensed water containing components of exhaust gas, and improves durability by preventing cracks from occurring due to metal fatigue. The aim is to provide water heaters that can.
本発明は、前記の如き目的を達成せんがため。 The present invention aims to achieve the above objects.
熱交換器の水管をオーステナイト系ステンレス鋼で構成
すると共に、熱交換器のフィンおよび燃焼胴をアルミニ
ウムで構成したことを特徴とする。It is characterized in that the water tubes of the heat exchanger are made of austenitic stainless steel, and the fins and combustion shell of the heat exchanger are made of aluminum.
アルミニウムおよびオーステナイト系ステンレスは、表
面に酸化皮膜を形成していて不８！１１態化しているた
め、硝酸、硫酸などに侵されに＜＜、耐蝕性を有し、し
かも水管に使用するオーステナイト系ステンレス管は鋼
管に比較して数倍以上の強度があるので、金属疲労によ
る亀裂が生じにくくなり、かくして大能力から小能力ま
での給湯を行なう給湯器の耐久性を顕著に向上させるこ
とができる。Aluminum and austenitic stainless steel have an oxide film formed on their surface and are in a non-8!11 state, so they are resistant to corrosion by nitric acid, sulfuric acid, etc. Stainless steel pipes are several times stronger than steel pipes, making them less likely to crack due to metal fatigue, and thus significantly improving the durability of water heaters that supply hot water from large to small capacities. .
以下、第１図ないし第３図について本発明の実施の一例
を説明する。An example of the implementation of the present invention will be described below with reference to FIGS. 1 to 3.
本発明は、第１図ないし第３図に示すように。The present invention is as shown in FIGS. 1 to 3.
熱交換器４のフィンブロックの水管４１および燃焼１１
ｊｌ ３の巻き水管４２を、オーステナイト系ステンレ
ス鋼で構成すると共に、熱交換器のフィンプレート４３
および燃焼胴３をアルミニウムにより構成する。Water pipes 41 and combustion 11 of the fin block of the heat exchanger 4
The water pipe 42 of the jl 3 is made of austenitic stainless steel, and the fin plate 43 of the heat exchanger is made of austenitic stainless steel.
The combustion shell 3 is made of aluminum.
本発明は、前記の如く、水管をオーステナイト系ステン
レス鋼で構成すると共に、熱交換器のフィンおよび燃焼
胴をアルミニウムにより構成したので、排気ガスの成分
を含む凝縮水が付着されるおそれがある熱交換器などの
表面は不動態化されて凝縮水に対する耐蝕性を有し、し
かも、疲労限界強度Ｎ＝１０’（繰り返し回数）が銅は
４ｋｇ／ｎｎ２であるの文に対し、オーステナイト系ス
テンレス／は２４ｋｇ／ｎｎ’であるので、水管に金属
疲労による亀裂が生じにくくなり、かくして、腐蝕によ
るフィンづまりが生ずるおそれや水管に亀裂が生ずるこ
とがないので、それだけ給湯器の耐久性を向上させるこ
とができる。As described above, in the present invention, the water tube is made of austenitic stainless steel, and the fins and combustion shell of the heat exchanger are made of aluminum. The surfaces of exchangers, etc. are passivated and have corrosion resistance against condensed water, and the fatigue limit strength N = 10' (number of repetitions) is 4 kg/nn2 for copper, whereas austenitic stainless steel/ Since it is 24 kg/nn', cracks due to metal fatigue are less likely to occur in the water pipes, and there is no risk of fin clogging due to corrosion or cracks in the water pipes, which can improve the durability of the water heater. can.
次に、前記の如き本発明の効果を実証するため。Next, in order to demonstrate the effects of the present invention as described above.
第５図に示す装置により凝縮水を採集して実験した結果
を述べる。The results of an experiment conducted by collecting condensed water using the apparatus shown in FIG. 5 will be described.
第５図に示すように、チャンバー中のバーナにてガス（
１３Ａ）を燃焼させ、その排気を真空ポンプで吸引し、
その途中、ガラス製の一次凝縮ジャケットおよび二次凝
縮ジャケットで排気ガスを水冷し、捕集フラスコに凝縮
水を採集した。As shown in Figure 5, the burner in the chamber produces gas (
13A) is burned, the exhaust gas is sucked in by a vacuum pump,
During this process, the exhaust gas was cooled with water using a glass primary condensation jacket and a secondary condensation jacket, and condensed water was collected in a collection flask.
得られた凝縮水は、 、 亜硝ｆｌｄ ＨＮＯ２６，ｌｐｐｍ 硝酸ＨＮＯ３０，７ＰＰｆｆｌ 硫 酸 Ｈ，８０４１，２ｐｐｍ 。The obtained condensed water is Nitrous fld HNO26, lppm Nitric acid HNO30,7PPffl Sulfuric acid H, 8041, 2ppm.
で、ＰＨは３．８であった。The pH was 3.8.
上記凝縮水をビー力に入れ、そのビーカ内の凝縮水に、
オーステナイト系ステンレス鋼、アルミニウム、銅、フ
ェライト系ステンレスｉ［（ＳＯ８４３０）をそれぞれ
別々に浸漬し、２５℃、４８時間後容疑縮水中の金属イ
オンの分析を行なった。その結果を下表に示す。Put the above condensed water into the beaker, and the condensed water in the beaker,
Austenitic stainless steel, aluminum, copper, and ferritic stainless steel (SO8430) were immersed separately, and after 48 hours at 25° C., metal ions in the condensed water were analyzed. The results are shown in the table below.
なお１分析は、原子吸光分析法により行なった。Note that one analysis was performed by atomic absorption spectrometry.
上記分析結果からも明らかなように、本発明に、より得
た給湯器の熱交換器などは、排ガスを含む凝縮水によっ
て腐蝕することがなく、がっ、金属疲労によって水管に
亀裂が生ずるおそれがないので、大能力から小能力まで
の給湯を行なう給湯器の耐久性を顕著に向上させること
ができる。As is clear from the above analysis results, the water heater heat exchanger obtained by the present invention is not corroded by condensed water containing exhaust gas, and there is a risk that cracks may occur in the water pipes due to metal fatigue. Therefore, the durability of water heaters that supply hot water from large to small capacities can be significantly improved.
第１図は本発明を適用した熱交換器および燃焼胴の斜視
図、第２図はフィンブロックの断面図、第３図は巻き水
管の断面図である。第４図は一般的な給湯器の構成図、
第５図は実験に使用した凝縮水採集装置の説明図である
。
３・・・燃焼胴、４・・・熱交換器、４１・・・フィン
ブロック水管、４２・・・燃焼ｊ）目巻き水管、４３・
・・フィン。
特許出願人 株式会社ガスター
代理人弁理士 秋 本 正 実
（外１名）
第１図
第２゛１
第４図FIG. 1 is a perspective view of a heat exchanger and combustion shell to which the present invention is applied, FIG. 2 is a sectional view of a fin block, and FIG. 3 is a sectional view of a winding water pipe. Figure 4 is a configuration diagram of a typical water heater.
FIG. 5 is an explanatory diagram of the condensed water collection device used in the experiment. 3... Combustion cylinder, 4... Heat exchanger, 41... Fin block water pipe, 42... Combustion j) Measuring water pipe, 43...
··fin. Patent applicant: Masami Akimoto, patent attorney representing Gaster Co., Ltd. (1 other person) Figure 1 Figure 2-1 Figure 4
Claims (1)
構成すると共に、熱交換器のフィンおよび燃焼胴をアル
ミニウムで構成したことを特徴とする給湯器。1. A water heater characterized in that the water tubes of the heat exchanger are made of austenitic stainless steel, and the fins and combustion shell of the heat exchanger are made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1127792A JPH02309153A (en) | 1989-05-23 | 1989-05-23 | Hot water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1127792A JPH02309153A (en) | 1989-05-23 | 1989-05-23 | Hot water supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02309153A true JPH02309153A (en) | 1990-12-25 |
Family
ID=14968794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1127792A Pending JPH02309153A (en) | 1989-05-23 | 1989-05-23 | Hot water supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02309153A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04335999A (en) * | 1991-05-09 | 1992-11-24 | Showa Alum Corp | Heat exchanger for supplying hot water of bath furnace, hot water supplying apparatus or the like |
| JP2007155310A (en) * | 2005-12-08 | 2007-06-21 | Chin Kuang Luo | Heat conductive assembly for water heater and manufacturing method of heat conductive assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4936043U (en) * | 1972-06-26 | 1974-03-30 | ||
| JPS5016707A (en) * | 1973-06-13 | 1975-02-21 |
-
1989
- 1989-05-23 JP JP1127792A patent/JPH02309153A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4936043U (en) * | 1972-06-26 | 1974-03-30 | ||
| JPS5016707A (en) * | 1973-06-13 | 1975-02-21 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04335999A (en) * | 1991-05-09 | 1992-11-24 | Showa Alum Corp | Heat exchanger for supplying hot water of bath furnace, hot water supplying apparatus or the like |
| JP2007155310A (en) * | 2005-12-08 | 2007-06-21 | Chin Kuang Luo | Heat conductive assembly for water heater and manufacturing method of heat conductive assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1600708B1 (en) | Method of producing a gas boiler, and gas boiler so produced | |
| WO2014044205A1 (en) | Forced spiral finned coil and finned serpentine coil condensation heat-supplying heat exchanger | |
| CN201210027Y (en) | Heat-transfer pipe applying to air preheater | |
| CN108286017A (en) | A kind of think gauge Q420 ranks high temperature high voltage resistant corrosion of sulfuric acid at dew point steel plate and its production method | |
| JPH02309153A (en) | Hot water supply device | |
| CN2831026Y (en) | Heat exchanger for condensing gas water heater | |
| GB1584053A (en) | Apparatus for concentrating a solution by evaporation | |
| JPH02309152A (en) | Hot water supply device | |
| CN201607138U (en) | Fume condenser | |
| CN100353136C (en) | Anti-corrosion copper condensing heat exchanger utilizing smoke heat energy, and manufacturing method thereof | |
| JP4100093B2 (en) | Method for producing austenitic stainless steel pipe | |
| KR200284927Y1 (en) | High Efficiency Heat Recovery Apparatus | |
| JP2002107068A (en) | Heat exchanger | |
| EP1052308B1 (en) | Process for coating of a heat exchanger | |
| CN213901503U (en) | Secondary condensation heat exchanger of gas water heating equipment | |
| JPS5978714A (en) | Production of corrosion resistant metallic tube | |
| Liang et al. | Research on dew point corrosion of materials | |
| JP2003185388A (en) | Latent heat recovery heat exchanger | |
| DeWerth et al. | Corrosive effects of condensate | |
| Ezhov et al. | Enhancement of Reliability and Efficiency of Heat Recovery of Off Gases and Ventilation Discharge | |
| GB2552523A (en) | Condensing boiler | |
| JPS63153399A (en) | Heat transfer tube for heat exchanger | |
| JPS6229896A (en) | Method of heat exchange for gaseous body | |
| DE10023218A1 (en) | Coating a heat exchanger comprises subjecting the heat exchanger to a plasma stream produced from a process gas to which silicon dioxide, aluminum oxide, silicon compounds and/or titanium compounds are added | |
| Okamoto et al. | Sulfuric acid dew resistant steel S-TEN 1 tube |