JPH0641085Y2 - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JPH0641085Y2 JPH0641085Y2 JP1986024317U JP2431786U JPH0641085Y2 JP H0641085 Y2 JPH0641085 Y2 JP H0641085Y2 JP 1986024317 U JP1986024317 U JP 1986024317U JP 2431786 U JP2431786 U JP 2431786U JP H0641085 Y2 JPH0641085 Y2 JP H0641085Y2
- Authority
- JP
- Japan
- Prior art keywords
- water pipe
- water
- combustion
- heat
- flow
- 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 - Lifetime
Links
Landscapes
- Details Of Fluid Heaters (AREA)
Description
【考案の詳細な説明】 （利用分野及び考案の概要） 本考案は、熱交換器、特に、フィンを取付けた吸熱用水
管に関するものであり、水管の燃焼熱気流の下流側に位
置する部分に断熱域を形成することにより、水管を低温
域に結露水が生じる不都合を防止するものである。[Detailed Description of the Invention] (Field of Use and Outline of the Invention) The present invention relates to a heat exchanger, in particular, to a water pipe for heat absorption having fins attached to a portion of the water pipe located downstream of the combustion heat flow. By forming the heat insulating region, it is possible to prevent the inconvenience of dew condensation in the water pipe in the low temperature region.
（従来技術及びその問題点） 湯沸器における熱交換器は、第８図の如く、筒状の缶体
（１）の上端開口部に多数のフィン（２），（２）を取
付けた水管（３），（３）を並設し、しかも、これら水
管を連通させたものである。(Prior Art and Problems Thereof) A heat exchanger in a water heater is a water pipe in which a large number of fins (2) and (2) are attached to an upper end opening of a cylindrical can body (1) as shown in FIG. (3) and (3) are arranged side by side, and moreover, these water pipes are connected.
この形式の熱交換器では、水管（３）は燃焼熱気流中に
置かれ、直接又はフィン（２），（２）を介して、燃焼
熱が水管（３）内を通る水に吸収される。In this type of heat exchanger, the water pipe (3) is placed in the combustion heat flow and the heat of combustion is absorbed by the water passing through the water pipe (3) either directly or through the fins (2), (2). .
ところが、水管（３）における燃焼熱気流の下流域で
は、熱気流と水管との接触域が少なく、水温が低い場合
や水流の流速が速い場合、さらには、燃焼量を絞った場
合には、この部分の水管表面温度が燃焼ガスの露点温度
以上に上昇せず、水管表面の低温域に結露する不都合が
生じる。However, in the downstream region of the combustion heat flow in the water pipe (3), there is little contact region between the heat flow and the water pipe, and when the water temperature is low, the flow velocity of the water flow is high, or when the combustion amount is reduced, The temperature of the surface of the water pipe in this portion does not rise above the dew point temperature of the combustion gas, and there is a disadvantage that dew condensation occurs in the low temperature region of the surface of the water pipe.
かかる不都合は、実開昭56-13688号公報に開示の考案に
よってある程度緩和できる。Such inconvenience can be alleviated to some extent by the device disclosed in Japanese Utility Model Publication No. 56-13688.
この従来のものでは、第９図の如く、フィン（２），
（２）のそれぞれの水管（３），（３）間に位置する部
分に整流板（21），（21）を設け、これら整流板を水管
（３）の上方に向けて傾斜させてある。この構成によ
り、熱気流は水管（３）の上方で水管（３）の表面に沿
った方向に曲げられることとなり、熱気流と水管（３）
との接触域が広くなる。これにより、上記した低温域が
少なくなり、水管表面の結露域が少なくなるのである。In this conventional type, as shown in FIG. 9, the fins (2),
Rectifying plates (21) and (21) are provided at the portions located between the water pipes (3) and (3) of (2), and these rectifying plates are inclined toward the upper side of the water pipe (3). With this configuration, the hot air flow is bent above the water pipe (3) in a direction along the surface of the water pipe (3), and the hot air flow and the water pipe (3) are bent.
Wider contact area with. As a result, the above-mentioned low temperature region is reduced and the dew condensation region on the surface of the water pipe is reduced.
ところが、上記構成によっても、熱交換器の容量が大き
くなった場合等では、上記した結露は防止できない。水
管（３）内の流量が多い場合や水温が低い場合には、水
管（３）内に上記した低温域が生じ易く、この低温域の
水管の表面温度が燃焼ガスの露点温度以下となってしま
うからである。However, even with the above configuration, the above-mentioned dew condensation cannot be prevented when the capacity of the heat exchanger is increased. When the flow rate in the water pipe (3) is large or when the water temperature is low, the above-mentioned low temperature region is likely to occur in the water pipe (3), and the surface temperature of the water pipe in this low temperature region is below the dew point temperature of the combustion gas. Because it will be.
（技術的課題） 本考案は、『多数のフィンを装備した複数の水管（３）
（３）を燃焼熱気流内に並設した形式の熱交換器』にお
いて、吸熱用の水管への結露を防止するために、水管
（３）内の水流の低温域が燃焼熱気流と直接接触しない
ようにすることをその課題とする。(Technical problem) The present invention proposes “a plurality of water pipes (3) equipped with a large number of fins”.
In a heat exchanger of the type in which (3) is arranged side by side in the combustion heat flow ”, in order to prevent dew condensation on the water pipe for heat absorption, the low temperature region of the water flow in the water pipe (3) is in direct contact with the combustion heat flow. The task is not to do so.
（手段） 上記課題を解決するために講じた本考案の技術的手段
は、『水管（３）の断面における燃焼熱気流の下流側部
分にこの水管と接触する流体滞留層を形成した』ことで
ある。(Means) The technical means of the present invention taken to solve the above-mentioned problem is that "a fluid retention layer that is in contact with the water pipe (3) is formed at the downstream side portion of the combustion heat flow in the cross section of the water pipe (3)". is there.
（作用） 本考案の上記技術的手段は次のように作用する。熱交換
状態において、水管（３）における熱気流の下流側は低
温域となるが、水管（３）のこの部分には流体滞留層が
ある。この部分の流体は、滞留状態にあることから、定
常熱交換状態では、低温域の流水の温度よりも高温度と
なっている。従って、燃焼熱気流と直接接触する流体滞
留層の構成壁表面の温度は、さらに高温状態に保たれ、
結果的に燃焼熱気流の露点以上となる。(Operation) The technical means of the present invention operates as follows. In the heat exchange state, the downstream side of the heat flow in the water pipe (3) is in a low temperature region, but there is a fluid retention layer in this portion of the water pipe (3). Since the fluid in this portion is in the stagnant state, the temperature is higher than the temperature of the flowing water in the low temperature region in the steady heat exchange state. Therefore, the temperature of the constituent wall surface of the fluid retention layer, which is in direct contact with the combustion heat flow, is maintained at a higher temperature,
As a result, it becomes higher than the dew point of the combustion hot air flow.
（効果） 本考案は上記構成であるから、次の特有の効果を有す
る。(Effect) Since the present invention has the above configuration, it has the following unique effects.
水管における熱気流の下流側部分にある流体滞留層の構
成壁の表面温度は、燃焼熱気流の露点温度以上の条件に
保たれるから、水管（３）の表面及び流体滞留層構成壁
のいずれの部分でも結露が生じない。従って、結露水が
生じることによる不都合、例えば、フィン詰りや結露水
による水管の腐食が防止できる。Since the surface temperature of the constituent wall of the fluid retention layer at the downstream side of the heat flow in the water pipe is maintained at a temperature equal to or higher than the dew point temperature of the combustion heat flow, both the surface of the water pipe (3) and the fluid retention layer formation wall Condensation does not occur even in the area. Therefore, it is possible to prevent inconvenience caused by the generation of dew condensation water, for example, fin clogging or corrosion of the water pipe due to dew condensation water.
（実施例） 以下、本考案の実施例を第１図〜第７図に従って説明す
る。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.
第１図〜第３図に示す第１実施例のものは、水管（３）
内に水の滞留域（31）を形成したもので、この滞留域は
水管（３）における上部に位置し、缶体内に配設された
状態では、この缶体の下部に設けられるバーナとの関係
で、燃焼熱気流の下流側に位置する。The first embodiment shown in FIGS. 1 to 3 has a water pipe (3).
A water retention area (31) is formed inside, and this retention area is located at the upper part of the water pipe (3), and when installed inside the can body, it is connected to the burner provided at the bottom of this can body. Therefore, it is located on the downstream side of the combustion hot air flow.
この為、水管（３）のフィン（２），（２）取付域の直
線部に第２図に示す区画板（４）が水管（３）内に挿入
される。この区画板には、その両端に円弧状の周縁を持
ち且両端で区画板（４）の両側縁に一致する舌片（4
1），（41）を直立させ、他方、両側縁には水管（３）
に内接する円弧状の脚（42），（42）が一定間隔で配設
されている。For this reason, the partition plate (4) shown in FIG. 2 is inserted into the water pipe (3) at the straight portions of the fins (2) and (2) mounting areas of the water pipe (3). This partition plate has a tongue piece (4) that has arcuate peripheral edges at both ends and that matches both side edges of the partition plate (4) at both ends.
1), (41) upright, while water pipes (3) on both sides
Arc-shaped legs (42) and (42) inscribed in the are arranged at regular intervals.
従って、この区画板（４）を水管（３）内に挿入し、脚
（42），（42）を排気熱気流の上流側に位置するように
すれば、水管（３）における排気熱気流の下流側には、
水管壁面と、区画板（４）と、この区画板（４）の舌片
（41），（41）とにより囲まれた空室ができ、この空室
が水の滞留域（31）となる。Therefore, if this partition plate (4) is inserted into the water pipe (3) and the legs (42) and (42) are positioned on the upstream side of the exhaust heat air flow, the exhaust heat flow in the water pipe (3) will be reduced. On the downstream side,
A vacant chamber surrounded by the wall surface of the water pipe, the partition plate (4), and the tongues (41), (41) of the partition plate (4) is formed, and this vacant chamber becomes the water retention area (31). .
この滞留域（31）は、区画板（４）と舌片（41），（4
1）と、水管（３）の内面とのラフな接触によって形成
されるものであるから、水管（３）内に通水すると、こ
の滞留域（31）に水が充満する。This retention area (31) includes a partition plate (4) and tongue pieces (41), (4
Since it is formed by rough contact between 1) and the inner surface of the water pipe (3), when water is passed through the water pipe (3), the retention area (31) is filled with water.
この滞留域内の水は、定常熱交換状態では水管（３）内
の水流と熱交換されにくく、しかも、流動しないから、
燃焼熱気流によって加熱されて露点温度近く又は露点温
度以上に保たれ、少なくとも滞留域（31）の外壁となる
水管壁面の温度は露点以上に維持される。The water in this retention area is less likely to exchange heat with the water flow in the water pipe (3) in the steady heat exchange state, and furthermore, does not flow,
It is heated by the combustion hot air flow and kept near or above the dew point temperature, and at least the temperature of the wall surface of the water pipe which is the outer wall of the retention region (31) is maintained above the dew point.
次に、第４図に示す第２実施例は、水管（３）の外部に
空気滞留用の空室（32）を水管（３）の上部に連設し、
この空室が缶体（１）内の水管（３）の全域にわたって
配設されるようにし、さらに、前記空室（32）を一部の
小孔（33）を介してのみ缶体（１）内と連通させたもの
である。Next, in a second embodiment shown in FIG. 4, an air chamber (32) for retaining air is continuously provided outside the water pipe (3) at the upper part of the water pipe (3).
The empty space is arranged over the entire area of the water pipe (3) in the can body (1), and the empty space (32) is provided only through the small holes (33). ) It has been communicated with the inside.
このものでは、水管（３）の上部には低温域が生じる
が、この低温域と接触する管壁の外部は空室（32）内の
滞留空気層となり、この空気層は燃焼排気とは対流しな
い。従って、この滞留空気層内の空気は、燃焼排気にく
らべて大幅に乾燥空気層となり、空室（32）内の露点
は、燃焼排気接触部の露点にくらべて低くなる。In this structure, a low temperature region occurs in the upper part of the water pipe (3), but the outside of the pipe wall in contact with this low temperature region becomes a stagnant air layer in the empty chamber (32), and this air layer convection with the combustion exhaust gas. do not do. Therefore, the air in the staying air layer becomes a much dry air layer as compared with the combustion exhaust gas, and the dew point in the vacant chamber (32) becomes lower than the dew point of the combustion exhaust gas contact portion.
他方、この空室（32）内は、外部の燃焼排気によって加
熱されているから、ある程度昇温せしめられた状態にあ
る。On the other hand, since the inside of the chamber (32) is heated by the external combustion exhaust gas, the temperature is raised to some extent.
このことから、空室（32）の外壁は燃焼排気の露点以上
に昇温せしめられ、他方、空室（32）内の露点は低い状
態にあるから、空室（32）の内外のいずれでも結露しな
いものとなる。From this, the outer wall of the vacant chamber (32) is heated to a temperature above the dew point of the combustion exhaust gas, while the dew point in the vacant chamber (32) is low, so that it can be used inside or outside the vacant chamber (32). No condensation will occur.
尚、上記実施例において、空室（32）は、缶体（１）内
には開口せず、第５図の如く、缶体（１）の外部にのみ
開放する構成としてもよく、この場合にも、上記実施例
と同様に機能する。又、空室（32）の構成の仕方として
は、第６図のように、水管（３）にこの水管より曲率の
大きな円弧状断面のカバー（34）をロウ付けにより添設
する方法、あるいは、中空パイプを第4,5図のように水
管（３）にロウ付けにより添設する方法等が考えられ
る。又、通常、水管（３）をフィン（２），（２）に挿
通させたあと、この水管（３）を拡管するが、上記実施
例のものでは、カバー（34）及び中空パイプも同時に挿
入したあと水管（３）を拡管させればよい。In the above embodiment, the empty chamber (32) may not be opened in the can body (1) but may be opened only to the outside of the can body (1) as shown in FIG. Also, the same function as in the above-mentioned embodiment is obtained. Further, as a method for constructing the vacant chamber (32), as shown in FIG. 6, a cover (34) having an arcuate cross section having a larger curvature than the water pipe is attached to the water pipe (3) by brazing, or It is possible to add a hollow pipe to the water pipe (3) by brazing as shown in FIGS. Further, normally, after inserting the water pipe (3) through the fins (2) and (2), the water pipe (3) is expanded. In the above embodiment, the cover (34) and the hollow pipe are also inserted at the same time. After that, the water pipe (3) may be expanded.
さらに、第７図の如く、水管（３），（３）を缶体
（１）内で上下２段に並設した場合、燃焼排気の下流側
に位置する水管（３），（３）群、すなわち、上段の水
管（３），（３）群において既述の結露現象が生じ易
い。従って、このような形式の熱交換器の場合には、上
段の水管（３），（３）群にのみ、流体滞留層を形成す
るようにしてもよい。Further, as shown in FIG. 7, when the water pipes (3), (3) are arranged in parallel in the upper and lower two stages in the can body (1), the water pipes (3), (3) group located on the downstream side of the combustion exhaust gas. That is, the above-mentioned dew condensation phenomenon easily occurs in the upper water pipes (3) and (3) group. Therefore, in the case of such a type of heat exchanger, the fluid retention layer may be formed only in the upper water pipes (3) and (3) group.
又、同図の熱交換器では、フィン（２），（２）による
受熱域を水管（３）の上方に偏らせてあるから、水管
（３）の上部、すなわち、燃焼排気の下流側が従来のも
のにくらべて、加熱され易くなり、この点でも結露防止
効果が促進せしめられる。Further, in the heat exchanger of the same figure, since the heat receiving area by the fins (2), (2) is biased above the water pipe (3), the upper part of the water pipe (3), that is, the downstream side of the combustion exhaust is conventionally Compared with the above, it becomes easier to heat, and the dew condensation prevention effect can be promoted also in this respect.
第１図は本考案の実施例の要部断面図，第２図はこれに
用いる区画板（４）の斜視図，第３図は要部の側面図，
第４図は第２実施例の要部断面図，第５図はこれの変形
例の説明図，第６図は空室（32）の形成方法の説明図，
第７図は本考案を採用する熱交換器の説明図，第８図，
第９図は従来例の説明図であり、図中、 （１）……缶体、（２）……フィン （３）……水管、（31）……滞留域 （32）……空室1 is a sectional view of an essential part of an embodiment of the present invention, FIG. 2 is a perspective view of a partition plate (4) used for this, FIG. 3 is a side view of the essential part,
FIG. 4 is a sectional view of an essential part of the second embodiment, FIG. 5 is an explanatory view of a modified example thereof, and FIG. 6 is an explanatory view of a method of forming the vacant chamber (32),
FIG. 7 is an explanatory view of a heat exchanger adopting the present invention, FIG. 8,
FIG. 9 is an explanatory view of a conventional example. In the figure, (1) ... can body, (2) ... fin (3) ... water pipe, (31) ... retention area (32) ... empty room
Claims (1)
（３）を燃焼熱気流内に並設した形式の熱交換器におい
て、水管（３）の断面における燃焼熱気流の下流側部分
にこの水管と接触する流体滞留層を形成した熱交換器。1. A plurality of water pipes (3) equipped with a large number of fins.
A heat exchanger of the type in which (3) is arranged side by side in a combustion heat flow, in which a fluid retention layer that is in contact with the water heat flow is formed at the downstream side portion of the combustion heat flow in the cross section of the water pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986024317U JPH0641085Y2 (en) | 1986-02-20 | 1986-02-20 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986024317U JPH0641085Y2 (en) | 1986-02-20 | 1986-02-20 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62138148U JPS62138148U (en) | 1987-08-31 |
| JPH0641085Y2 true JPH0641085Y2 (en) | 1994-10-26 |
Family
ID=30823436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986024317U Expired - Lifetime JPH0641085Y2 (en) | 1986-02-20 | 1986-02-20 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0641085Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018096622A (en) * | 2016-12-14 | 2018-06-21 | 株式会社ノーリツ | Heat exchanger, water heater, and method of manufacturing heat exchanger |
| JP2020169759A (en) * | 2019-04-02 | 2020-10-15 | 株式会社パロマ | Heat exchanger and water heater |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49139649U (en) * | 1973-03-23 | 1974-12-02 | ||
| JPS57188960A (en) * | 1981-05-19 | 1982-11-20 | Matsushita Electric Ind Co Ltd | Heat exchanger for water heater |
| JPS6050749U (en) * | 1983-09-13 | 1985-04-10 | 株式会社ノーリツ | Can body for forced circulation bath pot |
-
1986
- 1986-02-20 JP JP1986024317U patent/JPH0641085Y2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018096622A (en) * | 2016-12-14 | 2018-06-21 | 株式会社ノーリツ | Heat exchanger, water heater, and method of manufacturing heat exchanger |
| US10408549B2 (en) | 2016-12-14 | 2019-09-10 | Noritz Corporation | Heat exchanger, hot water apparatus, and method of manufacturing heat exchanger |
| JP2020169759A (en) * | 2019-04-02 | 2020-10-15 | 株式会社パロマ | Heat exchanger and water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62138148U (en) | 1987-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2003343926A (en) | Heat exchanger arrangement structure for condensing gas boiler | |
| JPH0641085Y2 (en) | Heat exchanger | |
| JPS5842A (en) | Heat exchanger | |
| JP2864308B2 (en) | Heat exchanger | |
| JPH0122551B2 (en) | ||
| US3175540A (en) | Hot water boiler | |
| JPS6130123Y2 (en) | ||
| JPH0625796Y2 (en) | Heat exchanger for instant hot water heater | |
| JPS6017623Y2 (en) | hot air heater | |
| JPS642118Y2 (en) | ||
| JPH0330717Y2 (en) | ||
| JP2558360Y2 (en) | Boiler economizer | |
| JPH041271B2 (en) | ||
| JPH0120606Y2 (en) | ||
| JPH0243010Y2 (en) | ||
| JPH018909Y2 (en) | ||
| JPH0129406Y2 (en) | ||
| JPH06229694A (en) | Water heater heat exchanger | |
| JPS6130114Y2 (en) | ||
| JPS6143044Y2 (en) | ||
| JPS5816103A (en) | Fire tube for vertical type fire tube boiler | |
| JPS6344642Y2 (en) | ||
| JPS6231823Y2 (en) | ||
| JPS6143043Y2 (en) | ||
| JPS6093244A (en) | water tube boiler |