JPH03225198A - Manufacture of heat exchanger - Google Patents
Manufacture of heat exchangerInfo
- Publication number
- JPH03225198A JPH03225198A JP2307290A JP2307290A JPH03225198A JP H03225198 A JPH03225198 A JP H03225198A JP 2307290 A JP2307290 A JP 2307290A JP 2307290 A JP2307290 A JP 2307290A JP H03225198 A JPH03225198 A JP H03225198A
- Authority
- JP
- Japan
- Prior art keywords
- header body
- header
- fluid passage
- heat exchanger
- main body
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
- F28F9/0221—Header boxes or end plates formed by stacked elements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、産業用オイルクーラ、カーエアコン用コン
デンサおよびエバポレータなどに用いられる熱交換器を
製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for manufacturing a heat exchanger used in industrial oil coolers, car air conditioner condensers, evaporators, and the like.
この明細書において、上下、左右は第５図の上下、左右
をいうものとする。また、前とは第２図下側を指し、後
とはこれと反対側を指すものとする。In this specification, up and down, left and right refer to the top, bottom, left and right of FIG. Further, the front refers to the lower side in Figure 2, and the rear refers to the opposite side.
従来の技術と発明の課題
以下の説明において、全図面を通じて同一物および同一
部分には同一符号を付して説明を省略する。2. Description of the Related Art and Problems of the Invention In the following description, the same parts and parts are denoted by the same reference numerals throughout all the drawings, and the description thereof will be omitted.
上記のような熱交換器としては、第４図および第５図に
示すようなものが用いられている。As the heat exchanger described above, those shown in FIGS. 4 and 5 are used.
この熱交換器は、両端が開口するとともにその長さ方向
が左右を向くように並列状に配置された複数の流体流通
用偏平状中空体（１０）と、上下両端の中空体（１０）
の外側に、該中空体（１０）との間に所定間隔をおいて
配置されたアルミニウム製サイドプレート（１１）と、
隣り合う中空体くＩＯ）間の左右両端部間および上下両
端の中空体く１０）とサイドプレート（１１）との間の
左右両端部に配置されたスペーサバー（１２）とを有す
る熱交換部（１３）を備えている。熱交換部（１３）に
おける隣り合う中空体（１）どうしの間の部分および上
下両端の中空体（１０）とサイドプレート（１１）との
間の部分が、前後方向に空気を流通させる空気流路（Ｉ
４）となっており、各空気流路（Ｉ４）内にアルミニウ
ム製ルーバ付コルゲートフィン（Ｉ５）が配置されて中
空体くＩ０）にろう付されている。そして、空気流路（
Ｉ４）内に、強制送風または自然送風によって空気が流
れるようになっている。熱交換部（Ｉ３）の左右両端に
はヘッダ（Ｉ９）が取付られている。ヘッダ（１９）は
、横断面略Ｕ字形でがっ開口が熱交換部（Ｉ３）側を向
くように熱交換部（Ｉ３）の両端に接合されたヘッダ本
体（Ｉ６）と、ヘッダ本体く１６）の上下両端に接合さ
れた垂直方形閉鎖板（２０）とより形成されている。一
方のヘッダ（１９）には流体入口（２Ｉ）が、他方のヘ
ッダ（Ｉ９）には流体出口（２２）が設けられている。This heat exchanger includes a plurality of flat hollow bodies (10) for fluid circulation arranged in parallel so that both ends are open and their length directions face left and right, and hollow bodies (10) at both upper and lower ends.
an aluminum side plate (11) disposed on the outside of the hollow body (10) at a predetermined distance;
A heat exchange section having spacer bars (12) arranged between the left and right ends between adjacent hollow bodies (10) and between the hollow bodies (10) at both upper and lower ends and the side plates (11). (13). The portion between the adjacent hollow bodies (1) in the heat exchange section (13) and the portion between the hollow body (10) at both upper and lower ends and the side plate (11) create an air flow that circulates air in the front-rear direction. Road (I
4), and an aluminum corrugated fin (I5) with a louver is arranged in each air flow path (I4) and brazed to the hollow body I0). And the air flow path (
I4), air is allowed to flow through forced or natural ventilation. Headers (I9) are attached to both left and right ends of the heat exchange section (I3). The header (19) includes a header main body (I6) that has a substantially U-shaped cross section and is joined to both ends of the heat exchanger (I3) so that the opening faces the heat exchanger (I3) side, and a header main body (I6) that has a substantially U-shaped cross section. ) is formed by vertical rectangular closing plates (20) joined to both upper and lower ends. One header (19) is provided with a fluid inlet (2I), and the other header (I9) is provided with a fluid outlet (22).
流体流通用偏平状中空体（１０）は、両面がろう材で覆
われた上下一対のアルミニウムブレージングシート製平
板（Ｉ７）と、平板（１７）どうしの間に介在させられ
かつ平板（Ｉ７）にろう付されたアルミニウム押出型材
製の流体通路形成部材（Ｉ８）とによ７て形成されてい
る。流体通路形成部材（１８）は、上下の平板（］Ｉ７
の前後両側縁どうしを連結する１対の側壁部（１８ａ）
と、両側壁部（１８ａ）の幅の中央部どうしを連結する
平板（１７）と平行な連結壁部（１８ｂ）と、連結壁部
（１８ｂ）の上下両側面にそれぞれ前後方向に所定間隔
をおいて連結壁部（Ｌ８ｂ）に対して直角をなすように
設けられ、かつ先端が平板（１７）に接合された左右方
向に伸びるフィン部（＋８ｃ）とよりなる。流体流通用
偏平状中空体くｌＯ）の流体通路形成部材としては、両
平板（１７）間の前後両側縁に配置されるサイドバーお
よび平板間に配置される蛇行板を用いてもよい。The flat hollow body for fluid circulation (10) includes a pair of upper and lower aluminum brazing sheet flat plates (I7) whose both sides are covered with a brazing material, and a flat plate (17) that is interposed between the flat plates (17). It is formed by a fluid passage forming member (I8) made of a brazed aluminum extrusion material. The fluid passage forming member (18) has upper and lower flat plates (]I7
A pair of side walls (18a) connecting the front and rear edges of the
, a connecting wall (18b) parallel to the flat plate (17) that connects the center portions of the widths of both side walls (18a), and a predetermined interval in the front-rear direction on both upper and lower sides of the connecting wall (18b). The fin portion (+8c) is provided perpendicularly to the connecting wall portion (L8b) and extends in the left-right direction and whose tip end is joined to the flat plate (17). As the fluid passage forming member of the flat hollow body for fluid circulation (10), side bars disposed on both front and rear edges between both flat plates (17) and meandering plates disposed between the flat plates may be used.
この熱交換器は、従来、２枚のアルミニウムブレージン
グシート製平板（１７）と流体通路形成部材（１８）と
を組合せることによって中空体形成用ユニットをつくっ
た後、複数の中空体形成用ユニットを、左右両端部間に
スペーサバー（１２）を介在させた状態で重ね合わせて
熱交換部用組合せ体をつくり、ついで平板（１７）と流
体通路形成部材（１８）、平板（１７）とスペーサバー
（１２）、および平板（１７）とフィン（１５）とを炉
中において同時にろう付して熱交換部（１３）を形成し
、熱交換部（１３）にヘッダ本体（１６）および閉鎖板
（２０）を溶接することにより製造されていたが、ヘッ
ダ本体（１３）の熱交換部（１３）への溶接作業が面倒
であるとともに、コストが高くなるという問題があった
。Conventionally, this heat exchanger is manufactured by combining two aluminum brazing sheet flat plates (17) and a fluid passage forming member (18) to form a hollow body forming unit, and then forming a plurality of hollow body forming units. are stacked on top of each other with spacer bars (12) interposed between the left and right ends to create a heat exchange unit assembly, and then the flat plate (17) and the fluid passage forming member (18), and the flat plate (17) and the spacer The bar (12), the flat plate (17), and the fin (15) are simultaneously brazed in a furnace to form a heat exchange part (13), and the heat exchange part (13) is fitted with a header body (16) and a closing plate. (20), but there were problems in that welding the header body (13) to the heat exchange part (13) was troublesome and the cost was high.
そこで、熱交換部（１３）を炉中ろう付により形成する
さいに、ヘッダ本体（１６）も同時にろう付することも
考えられたが、熱交換部用組合せ体を炉中で加熱すると
平板（１７）の両面を覆っているろう材が溶けるために
、上下方向に縮み、このさいにヘッダ本体（１６）と熱
交換部用組合せ体との間に前後方向の位置すれが生じて
、出来上がった製品においてヘッダ本体（１６）と熱交
換部（１３）との接合部から洩れが生じたり、あるいは
極端な場合にはろう付できない場合もあった。Therefore, when forming the heat exchange part (13) by brazing in the furnace, it was considered to braze the header body (16) at the same time, but if the heat exchange part assembly was heated in the furnace, the flat plate ( As the brazing filler metal covering both sides of the header (17) melts, it shrinks in the vertical direction, and at this time, a positional misalignment occurs in the front and back direction between the header body (16) and the heat exchanger assembly, resulting in the completed header body (16) In the product, leakage occurred from the joint between the header body (16) and the heat exchange part (13), or in extreme cases, brazing could not be performed.
この発明の目的は、上記問題を解決した熱交換器の製造
方法を提供することにある。An object of the present invention is to provide a method for manufacturing a heat exchanger that solves the above problems.
課題を解決するための手段
この発明による熱交換器の製造方法は、両端が開口する
とともにその長さ方向が左右を向くように並列状に配置
された複数の流体流通用偏平状中空体、および隣り合う
中空体間の左右両端部間に配置されたスペーサバーより
形成されている熱交換部と、横断面略Ｕ字形でかつ開口
か中空体側を向くように熱交換部の両端に接合されてい
るヘッダ本体とを備えており、偏平状中空体が上下に所
定間隔をおいて配置された２枚のアルミニウムブレージ
ングシート製平板と両平板間に配置されて両平板にろう
付された流体通路形成部材とよりなる熱交換器を製造す
る方法であって、２枚のアルミニウムブレージングシー
ト製平板と流体通路形成部材とを組合せることによって
中空体形成用ユニットをつくること、複数の中空体形成
用ユニットを、左右両端部間にスペーサバーを介在させ
た状態で重ね合わせて熱交換部用組合せ体をつくること
、ヘッダ本体の前後両側壁の先端部内面に段部を介して
幅広部を設けておき、熱交換部用組合せ体の左右両端部
をヘッダ本体の幅広部内に嵌め人れるとともに、熱交換
部用組合せ体の端面と段部との間、および前後両側面と
幅広部の内面との間にそれぞれろう材を介在させること
、ならびに平板と流体通路形成部材、平板とスペーサバ
ー、平板とヘッダ本体、流体通路形成部材とヘッダ本体
、およびスペーサバーとヘッダ本体とをそれぞれ同時に
ろう付することを特徴とするものである。Means for Solving the Problems A method for manufacturing a heat exchanger according to the present invention comprises: a plurality of flat hollow bodies for fluid circulation arranged in parallel so that both ends are open and their length directions face left and right; A heat exchange section formed by a spacer bar arranged between the left and right ends of adjacent hollow bodies, and a heat exchange section formed by a spacer bar disposed between the left and right ends of adjacent hollow bodies, and a heat exchange section joined to both ends of the heat exchange section so that the cross section is approximately U-shaped and the opening faces the hollow body side. The header body includes a flat hollow body made of two aluminum brazing sheets arranged vertically at a predetermined interval, and a fluid passage formed by being placed between both flat plates and brazed to both flat plates. A method for manufacturing a heat exchanger comprising members, the method comprising: creating a hollow body forming unit by combining two flat plates made of aluminum brazing sheets and a fluid passage forming member; and a plurality of hollow body forming units. are placed one on top of the other with a spacer bar interposed between the left and right ends to form a heat exchange unit assembly, and a wide part is provided on the inner surface of the tip of both front and rear walls of the header body via a stepped part. , both left and right ends of the heat exchanger combination body are fitted into the wide part of the header body, and between the end face of the heat exchanger combination body and the stepped part, and between both front and rear sides and the inner surface of the wide part. and brazing the flat plate and the fluid passage forming member, the flat plate and the spacer bar, the flat plate and the header body, the fluid passage forming member and the header body, and the spacer bar and the header body at the same time. This is a characteristic feature.
実 施 例 以下、この発明の実施例を、図面を参照して説明する。Example Embodiments of the invention will be described below with reference to the drawings.
第１図〜第３図において、ヘッダ本体（１６）の前後両
側壁（ｌｅａ）の先端部内面に段部（１）を介して幅広
部（２）を設けておき、段部（１）および幅広部（２）
内面にまたがって横断面り字形のろう材（３）を配置す
る。そして、芯材（１７ａ）の両面がろう材（１７ｂ）
で覆われた２枚のアルミニウムブレージングシート製平
板（１７）と流体通路形成部材（１８）とを組合せるこ
とによって中空体形成用ユニット（４）をつくり、複数
の中空体形成用ユニット（４）を、左右両端部間にスペ
ーサバ（１２）を介在させた状態で重ね合わせて熱交換
部用組合せ体（５）をつくる。ヘッダ本体くＩ６）の長
さは、後工程の炉中ての加熱のさいの組合せ体（５）の
上下方向の縮みを考慮して決められる。In Figures 1 to 3, a wide part (2) is provided on the inner surface of the tip of the front and rear walls (lea) of the header body (16) via a step (1), and the step (1) and Wide part (2)
A brazing filler metal (3) having a square cross section is placed across the inner surface. Both sides of the core material (17a) are brazing material (17b).
A hollow body forming unit (4) is made by combining two aluminum brazing sheet flat plates (17) covered with a fluid passage forming member (18), and a plurality of hollow body forming units (4) are stacked on top of each other with a spacer bar (12) interposed between the left and right ends to form a heat exchanger assembly (5). The length of the header body (I6) is determined in consideration of vertical shrinkage of the assembly (5) during heating in a furnace in the subsequent process.
ついて、熱交換部用組合せ体（５）の左右両端部をヘッ
ダ本体（１Ｂ）の幅広部（２）内に、熱交換部用組合せ
体（５）の端面と段部（１）との間、および前後両側面
と幅広部（２）の内面との間にそれぞれろう材（３）が
介在させられるように嵌め入れる。このとき、ヘッダ本
体（１６）と組合せ体（５）とは、ヘッダ本体（１６）
を組合せ体（５）の左右両端面に押付けるようなばねの
弾性力を利用した治具（図示略）によって固定しておく
。その後、これらを炉中で加熱し、平板（１７）と流体
通路形成部材（１８）、平板（１７）とスペーサバー（
１２）、平板（１７）とヘッダ本体（１６）、流体通路
形成部材（１８）とヘッダ本体（１６）、およびスペー
サバー（１２）とヘッダ本体（１６）とをそれぞれ同時
にろう付する。こうして熱交換器が製造される。Then, place both left and right ends of the heat exchange part combination body (5) into the wide part (2) of the header body (1B), between the end surface of the heat exchange part combination body (5) and the stepped part (1). , and the brazing material (3) is inserted between both the front and rear sides and the inner surface of the wide portion (2). At this time, the header body (16) and the combination body (5) are the header body (16)
are fixed by a jig (not shown) that utilizes the elastic force of a spring to press against both left and right end surfaces of the combination body (5). Thereafter, these are heated in a furnace, and the flat plate (17) and the fluid passage forming member (18), the flat plate (17) and the spacer bar (
12) Simultaneously braze the flat plate (17) and the header body (16), the fluid passage forming member (18) and the header body (16), and the spacer bar (12) and the header body (16). A heat exchanger is thus manufactured.
熱交換部用組合せ体（５）を炉中で加熱したさいに、平
板（１７）の芯材（１７ａ）両面を覆っているろう材（
１７ｂ）が溶けて組合せ体（５）が上下方向に縮んだ場
合にも、組合せ体（５）の左右両端部はヘッダ本体（１
Ｂ）の段部（１）および幅広部（２）にガイドされて上
下方向に移動することとなり、熱交換部用組合せ体（５
）とヘッダ本体（１６）との間に前後方向の位置ずれが
生して、隙間が発生することが防止される。したがって
、出来上がった製品においてヘッダ本体（１６）と熱交
換部（１３）との接合部は良好にろう付されている。When the heat exchanger assembly (5) is heated in a furnace, the brazing filler metal (17a) covering both sides of the core material (17a) of the flat plate (17)
17b) melts and the combination body (5) shrinks in the vertical direction, both left and right ends of the combination body (5)
It moves vertically guided by the step part (1) and wide part (2) of B), and the heat exchange part combination (5
) and the header body (16) in the front-rear direction, thereby preventing the generation of a gap. Therefore, in the finished product, the joint between the header body (16) and the heat exchange section (13) is well brazed.
なお、上記方法で製造された熱交換器は、中空体の長さ
方向を上下に向けて使用されることもある。Note that the heat exchanger manufactured by the above method may be used with the length direction of the hollow body facing up and down.
発明の効果
この発明の熱交換器の製造方法によれば、上述のように
して、出来上がった製品においてヘッダ本体と熱交換部
とは良好にろう付されているので、このろう材部から洩
れが発生するのを防止できる。しかも、熱交換部の製造
とヘッダ本体の熱交換部への接合とを同時に行えるので
、作業が容易になる。Effects of the Invention According to the method of manufacturing a heat exchanger of the present invention, as described above, in the finished product, the header main body and the heat exchange part are well brazed, so that no leakage occurs from the brazing material part. This can be prevented from occurring. Moreover, the manufacturing of the heat exchange section and the joining of the header body to the heat exchange section can be performed at the same time, making the work easier.
第１図〜第３図はこの発明の実施例を示し、第１図は熱
交換部用組合せ体の左右両端部をヘッダ本体の幅広部内
に嵌め入れる前の状態を示す一部を切欠いた部分斜視図
、第２図は熱交換部用組合せ体の左右両端部をヘッダ本
体の幅広部内に嵌め入れた後の状態を示す一部を切欠い
た部分平面図、第３図は熱交換部用組合せ体の一部を拡
大して示す部分正面図である。第４図は従来の方法によ
って製造された熱交換器を示す一部を切欠いた部分斜視
図、第５図は従来の方法によって製造された熱交換器全
体を示す正面図である。
（１）・・・段部、（２）・・・幅広部、（３）・・・
ろう材、（４）・・・中空体形成用ユニット、（５）・
・・熱交換部用組合せ体、（１０）・・・流体流通用偏
平状中空体、（１２）・・・スペーサバー （１３）・
・・熱交換部、（１６）・・・ヘッダ本体、（１７）・
・・アルミニウムブレージングシート製平板、
（１８）・・・流体通路形成部材。
以
上
第１日
ｚ８
（」Figures 1 to 3 show an embodiment of the present invention, and Figure 1 is a partially cutaway portion showing the state before the left and right ends of the heat exchange unit assembly are fitted into the wide part of the header body. A perspective view, FIG. 2 is a partially cutaway plan view showing the state after the left and right ends of the heat exchange unit combination are fitted into the wide part of the header body, and FIG. 3 is a partially cutaway plan view of the heat exchange unit combination. It is a partial front view which expands and shows a part of a body. FIG. 4 is a partially cutaway perspective view showing a heat exchanger manufactured by a conventional method, and FIG. 5 is a front view showing the entire heat exchanger manufactured by a conventional method. (1)...Stepped part, (2)...Wide part, (3)...
Brazing filler metal, (4)... hollow body forming unit, (5)...
... Combination body for heat exchange part, (10) ... Flat hollow body for fluid circulation, (12) ... Spacer bar (13) ...
・・Heat exchange part, (16) ・・Header body, (17)・
... Flat plate made of aluminum brazing sheet, (18) ... Fluid passage forming member. That’s all for the first day z8 (”
Claims (1)
に並列状に配置された複数の流体流通用偏平状中空体、
および隣り合う中空体間の左右両端部間に配置されたス
ペーサバーより形成されている熱交換部と、横断面略Ｕ
字形でかつ開口が中空体側を向くように熱交換部の両端
に接合されているヘッダ本体とを備えており、偏平状中
空体が上下に所定間隔をおいて配置された２枚のアルミ
ニウムブレージングシート製平板と両平板間に配置され
て両平板にろう付された流体通路形成部材とよりなる熱
交換器を製造する方法であって、２枚のアルミニウムブ
レージングシート製平板と流体通路形成部材とを組合せ
ることによって中空体形成用ユニットをつくること、複
数の中空体形成用ユニットを、左右両端部間にスペーサ
バーを介在させた状態で重ね合わせて熱交換部用組合せ
体をつくること、ヘッダ本体の前後両側壁の先端部内面
に段部を介して幅広部を設けておき、熱交換部用組合せ
体の左右両端部をヘッダ本体の幅広部内に嵌め入れると
ともに、熱交換部用組合せ体の端面と段部との間、およ
び前後両側面と幅広部の内面との間にそれぞれろう材を
介在させること、ならびに平板と流体通路形成部材、平
板とスペーサバー、平板とヘッダ本体、流体通路形成部
材とヘッダ本体、およびスペーサバーとヘッダ本体とを
それぞれ同時にろう付することを特徴とする熱交換器の
製造方法。a plurality of flat hollow bodies for fluid circulation arranged in parallel so that both ends are open and the length directions thereof face left and right;
and a heat exchange section formed by spacer bars arranged between the left and right ends of the adjacent hollow bodies, and a cross section approximately U.
The header body is connected to both ends of the heat exchange part so that the opening faces the hollow body side, and the header body is made of two aluminum brazing sheets in which flat hollow bodies are arranged vertically at a predetermined interval. A method for manufacturing a heat exchanger comprising a flat plate and a fluid passage forming member disposed between the two flat plates and brazed to both flat plates, the method comprising: two flat plates made of aluminum brazing sheets and the fluid passage forming member. A unit for forming a hollow body is made by combining them, a unit for forming a heat exchange part is made by stacking a plurality of units for forming a hollow body with a spacer bar interposed between the left and right ends, and a header body. A wide part is provided on the inner surface of the tip of the front and rear walls of the header via a stepped part, and both left and right ends of the heat exchanger assembly are fitted into the wide parts of the header body, and the end faces of the heat exchanger assembly are fitted into the wide parts of the header body. and the stepped portion, and between both front and rear side surfaces and the inner surface of the wide portion, and the flat plate and the fluid passage forming member, the flat plate and the spacer bar, the flat plate and the header body, and the fluid passage forming member. A method for manufacturing a heat exchanger, comprising simultaneously brazing a spacer bar and a header body, and a spacer bar and a header body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307290A JPH03225198A (en) | 1990-01-31 | 1990-01-31 | Manufacture of heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307290A JPH03225198A (en) | 1990-01-31 | 1990-01-31 | Manufacture of heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03225198A true JPH03225198A (en) | 1991-10-04 |
Family
ID=12100198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2307290A Pending JPH03225198A (en) | 1990-01-31 | 1990-01-31 | Manufacture of heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03225198A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6173493B1 (en) * | 1998-10-15 | 2001-01-16 | Robert F. Dierbeck | Modular heat exchanger and method of making |
| KR100417538B1 (en) * | 2001-09-06 | 2004-02-05 | 백성룡 | Waste water heat collector by using heat exchange way |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0481114A (en) * | 1990-07-24 | 1992-03-13 | Canon Inc | Surface acoustic wave convolver |
-
1990
- 1990-01-31 JP JP2307290A patent/JPH03225198A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0481114A (en) * | 1990-07-24 | 1992-03-13 | Canon Inc | Surface acoustic wave convolver |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6173493B1 (en) * | 1998-10-15 | 2001-01-16 | Robert F. Dierbeck | Modular heat exchanger and method of making |
| KR100417538B1 (en) * | 2001-09-06 | 2004-02-05 | 백성룡 | Waste water heat collector by using heat exchange way |
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