JP2021067441A

JP2021067441A - Stainless heat exchanger

Info

Publication number: JP2021067441A
Application number: JP2019195401A
Authority: JP
Inventors: 大友　昇; Noboru Otomo; 昇大友; 正信齋藤; Masanobu Saito
Original assignee: Atago Seisakusho Co Ltd
Current assignee: Atago Seisakusho Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2021-04-30
Anticipated expiration: 2039-10-28
Also published as: JP7345176B2

Abstract

To provide a stainless heat exchanger which can be made lightweight and reduce material cost.SOLUTION: A plurality of cylindrical water pipes 1 is disposed in parallel in such a manner that outer surfaces of adjacent water pipes 1 and 1 are in contact with each other, and the adjacent water pipes 1 and 1 are brazed to each other in a length direction. A cylindrical first header pipe 2 is connected to one end of the water pipe 1, and a cylindrical second header pipe 3 is connected to the other end of the water pipe 1. A plurality of disc-shaped partition wings 6 partitioning an internal space is disposed within the first and second header pipes 2 and 3. The partition wings 6 form a water channel in which water flowing in from a water inlet pipe 4 alternately reversely flows through the plurality of water pipes 1 and flows out of a water outlet pipe 5 while being turned between the first and second header pipes 2 and 3. Along the plurality of water pipes 1, a pair of coolant pipes 8 and 8 in a serpentine shape is brazed at both the sides.SELECTED DRAWING: Figure 1

Description

本発明は、冷媒（ＣＯ２を含む）と水との熱交換を行うステンレス製熱交換器に関する。 The present invention relates to a stainless steel heat exchanger that exchanges heat between a refrigerant (including CO2) and water.

従来、熱交換器は熱伝導率の高い銅材で作製されることが一般的であった。特許文献１、２には銅製のプレート式熱交換器が記載されている。 Conventionally, heat exchangers have generally been made of copper material having high thermal conductivity. Patent Documents 1 and 2 describe copper plate heat exchangers.

特開２０００−１８００７７号公報Japanese Unexamined Patent Publication No. 2000-180077 特開２００９−０７４７７２号公報Japanese Unexamined Patent Publication No. 2009-0747772

しかしながら、銅製熱交換器においては水等の圧力に対する耐圧を確保するために、銅材は相応の肉厚が必要であり、その結果として熱交換器の重量が大きくなり、また材料費が高くなるという問題があった。 However, in a copper heat exchanger, in order to secure a withstand voltage against pressure of water or the like, the copper material needs to have an appropriate wall thickness, and as a result, the weight of the heat exchanger becomes large and the material cost becomes high. There was a problem.

また、銅製熱交換器では孔食等の耐食性の問題があった。 Further, the copper heat exchanger has a problem of corrosion resistance such as pitting corrosion.

上述の課題に鑑み、本発明のステンレス製熱交換器は、長手方向に互いにロウ付けされた複数の円筒状の水管と、前記複数の水管の一方の端に接続された円筒状の第１のヘッダー管と、前記複数の水管の他方の端に接続された円筒状の第２のヘッダー管と、前記第１のヘッダー管の一方の端部に接続された水入口管と、前記第１のヘッダー管の他方の端部に接続された水出口管と、前記水入口管から流入した水が前記複数の水管を交互に逆方向に流れ、前記第１及び第２のヘッダー管の間で折り返されながら前記水出口管から流出する水流路を形成するように、前記第１及び第２のヘッダー管の内部を仕切る複数の円板状の仕切り羽と、前記複数の水管に沿って、水管の上面と裏面にそれぞれロウ付けされたサーペンタイン形状を有する一対の冷媒管と、前記一対の冷媒管の一方の端に接続された冷媒入口ヘッダー管と、前記一対の冷媒管の他方の端に接続された冷媒出口ヘッダー管と、を備えることを特徴とする。 In view of the above problems, the stainless steel heat exchanger of the present invention has a plurality of cylindrical water pipes brazed to each other in the longitudinal direction and a first cylindrical water pipe connected to one end of the plurality of water pipes. A header pipe, a cylindrical second header pipe connected to the other end of the plurality of water pipes, a water inlet pipe connected to one end of the first header pipe, and the first one. The water outlet pipe connected to the other end of the header pipe and the water flowing in from the water inlet pipe alternately flow in the opposite directions through the plurality of water pipes and fold back between the first and second header pipes. A plurality of disc-shaped partition blades partitioning the inside of the first and second header pipes and the water pipes along the plurality of water pipes so as to form a water flow path flowing out from the water outlet pipe. A pair of refrigerant pipes having a serpentine shape brazed on the upper surface and the back surface, a refrigerant inlet header pipe connected to one end of the pair of refrigerant pipes, and connected to the other end of the pair of refrigerant pipes. It is characterized by including a refrigerant outlet header pipe.

本発明のステンレス製熱交換器によれば、ステンレス材の材料強度が銅材より高く、その肉厚を小さくできるので、軽量化と材料費の削減化が可能になる。 According to the stainless steel heat exchanger of the present invention, the material strength of the stainless steel material is higher than that of the copper material, and the wall thickness thereof can be reduced, so that the weight and the material cost can be reduced.

また、ヘッダー管の内部に仕切り羽を設けて、水管の水流路を２つのヘッダー管の間で折り返すように構成したことで、水と冷媒との熱交換を促進し、銅製熱交換器に匹敵する熱交換効率を得ることができる。 In addition, a partition blade is provided inside the header pipe so that the water flow path of the water pipe is folded back between the two header pipes to promote heat exchange between water and the refrigerant, which is comparable to a copper heat exchanger. The heat exchange efficiency can be obtained.

本発明の実施形態によるステンレス製熱交換器の正面図である。It is a front view of the stainless steel heat exchanger according to the embodiment of this invention. 本発明の実施形態によるステンレス製熱交換器の各部を示す図である。（図２（ａ）は図１のＡ−Ａ線における断面図、図２（ｂ）は支持棒体の正面図、図２（ｃ）はステンレス製熱交換器の側面図）It is a figure which shows each part of the stainless steel heat exchanger according to the embodiment of this invention. (FIG. 2 (a) is a cross-sectional view taken along the line AA of FIG. 1, FIG. 2 (b) is a front view of the support rod, and FIG. 2 (c) is a side view of the stainless steel heat exchanger). 本発明の実施形態による２段ステンレス製熱交換器を示す平面図及び正面図である。It is a top view and the front view which shows the two-stage stainless steel heat exchanger according to the embodiment of this invention. 図３の２段ステンレス製熱交換器の側面図である。It is a side view of the two-stage stainless steel heat exchanger of FIG.

以下、本発明の実施形態によるステンレス製熱交換器の構成を説明する。先ず、ステンレス製熱交換器１００（１ユニット１段構成）について、図１及び図２に基づいて説明する。 Hereinafter, the configuration of the stainless steel heat exchanger according to the embodiment of the present invention will be described. First, the stainless steel heat exchanger 100 (one unit, one stage configuration) will be described with reference to FIGS. 1 and 2.

図１は、ステンレス製熱交換器１００の正面図である。図２は、ステンレス製熱交換器１００の各部を示す図であり、図２（ａ）は図１のＡ−Ａ線における断面図、図２（ｂ）は支持棒体７の正面図、図２（ｃ）はステンレス製熱交換器１００の側面図である。 FIG. 1 is a front view of the stainless steel heat exchanger 100. 2A and 2B are views showing each part of the stainless steel heat exchanger 100, FIG. 2A is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 2B is a front view and a view of the support rod 7. 2 (c) is a side view of the stainless steel heat exchanger 100.

複数（好ましくは数十本という多数）の円筒状の水管１は、隣接する水管１，１の外面が互いに接触するように並設されている。隣接する水管１，１は、長手方向に沿ってロウ付けされおり、これらの水管１が集まって一体化された剛体になっている。これらの水管１の一方の端には円筒状の第１のヘッダー管２が接続され、これらの水管１の他方の端には円筒状の第２のヘッダー管３が接続されている。 A plurality of (preferably a large number of several tens) cylindrical water pipes 1 are arranged side by side so that the outer surfaces of adjacent water pipes 1 and 1 are in contact with each other. The adjacent water pipes 1 and 1 are brazed along the longitudinal direction, and these water pipes 1 are gathered together to form a rigid body. A cylindrical first header pipe 2 is connected to one end of these water pipes 1, and a cylindrical second header pipe 3 is connected to the other end of these water pipes 1.

この場合、各水管１は、第１及び第２のヘッダー管２，３の長手方向に沿って開口された穴に挿入され、ロウ付け等により接続されている。第１のヘッダー管２の開口端は第１の蓋体２Ａ，２Ｂにより塞がれ、第２のヘッダー管３の開口端は第２の蓋体３Ａ，３Ｂにより塞がれている。また、第１のヘッダー管２の長手方向の一方の端部には水入口管４が接続され、第１のヘッダー管２の他方の端部には水出口管５が接続されている。 In this case, each water pipe 1 is inserted into a hole opened along the longitudinal direction of the first and second header pipes 2 and 3, and is connected by brazing or the like. The open end of the first header tube 2 is closed by the first lids 2A and 2B, and the open end of the second header tube 3 is closed by the second lids 3A and 3B. Further, a water inlet pipe 4 is connected to one end of the first header pipe 2 in the longitudinal direction, and a water outlet pipe 5 is connected to the other end of the first header pipe 2.

第１及び第２のヘッダー管２，３の内部には、管の内部空間を仕切る複数の円板状の仕切り羽６が配置されている。これらの仕切り羽６は、水入口管４から流入した水が複数の水管１を交互に逆方向に流れ、かつ第１及び第２のヘッダー管２，３の間で折り返されながら水出口管５から流出する水流路を形成する。 Inside the first and second header pipes 2 and 3, a plurality of disc-shaped partition blades 6 for partitioning the internal space of the pipes are arranged. In these partition blades 6, the water flowing from the water inlet pipe 4 flows alternately through the plurality of water pipes 1 in opposite directions, and the water outlet pipe 5 is folded back between the first and second header pipes 2 and 3. Form a water flow path that flows out of.

仕切り羽６の配置例を説明すると、第１のヘッダー管２については、水入口管４に最も近い仕切り羽６は、２本の水管１の束と、隣接する４本の水管４の束との間に設けられ、これに続く仕切り羽６は、４本の水管１毎に１枚設けられる。そして、水出口管５に最も近い仕切り羽６は、２本の水管１の束と、隣接する４本の水管１の束との間に設けられる。これに対して、第２のヘッダー管３については、仕切り羽６は４本の水管１毎に１枚設けられる。 Explaining an arrangement example of the partition blade 6, regarding the first header pipe 2, the partition blade 6 closest to the water inlet pipe 4 is a bundle of two water pipes 1 and a bundle of four adjacent water pipes 4. A partition blade 6 is provided between the two water pipes, and one partition blade 6 is provided for each of the four water pipes 1. The partition blade 6 closest to the water outlet pipe 5 is provided between the bundle of two water pipes 1 and the bundle of four adjacent water pipes 1. On the other hand, for the second header pipe 3, one partition blade 6 is provided for every four water pipes 1.

このように構成すると、第１のヘッダー管２の入口管４から流入した水は、水入口管５に最も近い仕切り羽６に堰き止められるとともに、２本の水管１を通って第２のヘッダー管３に流入する。 With this configuration, the water flowing in from the inlet pipe 4 of the first header pipe 2 is blocked by the partition blade 6 closest to the water inlet pipe 5, and the second header passes through the two water pipes 1. It flows into the pipe 3.

そして、第２のヘッダー管３に入った水は第２のヘッダー管３の１番目の仕切り羽６によって堰き止められるとともに、隣接する２本の水管１を通って逆方向に流れ、第１のヘッダー管２に還流する。そして、第１のヘッダー管２に還流した水は第１のヘッダー管２の２番目の仕切り羽６によって堰き止められるとともに、隣接する２本の水管１を通って逆方向に流れ、再び第２のヘッダー管３に流入する、という経路を繰り返す。 Then, the water that has entered the second header pipe 3 is blocked by the first partition blade 6 of the second header pipe 3 and flows in the opposite direction through the two adjacent water pipes 1, and the first Reflux to the header tube 2. Then, the water that has returned to the first header pipe 2 is blocked by the second partition blade 6 of the first header pipe 2, flows in the opposite direction through the two adjacent water pipes 1, and is again second. The route of flowing into the header pipe 3 of the above is repeated.

これにより、水入口管４から流入した水が複数の水管１を交互に逆方向に流れ、かつ第１及び第２のヘッダー管２，３の間で折り返されながら水出口管５から流出する水流路を形成することになる。このような仕切り羽６の配置例は一例であって、何本の水管１を１束とするかは、適宜変更することができる。 As a result, the water flowing in from the water inlet pipe 4 alternately flows through the plurality of water pipes 1 in opposite directions, and flows out from the water outlet pipe 5 while being folded back between the first and second header pipes 2 and 3. It will form a road. Such an arrangement example of the partition blades 6 is an example, and the number of water pipes 1 to be bundled can be appropriately changed.

図２（ｂ）に示すように、複数の円板状の仕切り羽６は、第１及び第２のヘッダー管２，３にそれぞれ挿入された支持棒体７，７の長手方向に沿って取り付けられることが好ましい。支持棒体７，７の両端はそれぞれ第１の蓋体２Ａ，２Ｂ、第２の蓋体３Ａ，３Ｂに挿通して固定することができる。これにより、複数の円板状の仕切り羽６を簡単に取り付けることができ、摩耗劣化の際の交換作業も容易である。 As shown in FIG. 2B, the plurality of disc-shaped partition blades 6 are attached along the longitudinal direction of the support rods 7 and 7 inserted into the first and second header pipes 2 and 3, respectively. It is preferable to be. Both ends of the support rods 7 and 7 can be inserted into and fixed to the first lids 2A and 2B and the second lids 3A and 3B, respectively. As a result, a plurality of disc-shaped partition blades 6 can be easily attached, and replacement work at the time of wear deterioration is also easy.

また、複数の水管１に沿って、その両側の外面にそれぞれサーペンタイン形状を有する一対の冷媒管８，８がロウ付けされている。この場合、一対の冷媒管８，８を複数の水管１に１本おきに重ね合せ、複数の水管１を流れる水と一対の冷媒管８，８を流れる冷媒とが互いに逆方向に流れるように構成することで、熱交換効率を高めることができる。 Further, a pair of refrigerant pipes 8 and 8 having a serpentine shape are brazed along the plurality of water pipes 1 on the outer surfaces on both sides thereof. In this case, the pair of refrigerant pipes 8 and 8 are superposed on the plurality of water pipes 1 every other one so that the water flowing through the plurality of water pipes 1 and the refrigerant flowing through the pair of refrigerant pipes 8 and 8 flow in opposite directions. By configuring it, the heat exchange efficiency can be improved.

図２（ｃ）に示すように、一対の冷媒管８，８の一方の端の冷媒入口８Ａ，８Ａには冷媒入口ヘッダー管９がロウ付け等により接続されている。これにより、冷媒は冷媒入口ヘッダー管９を介して一対の冷媒管８，８にそれぞれ分流するようになっている。 As shown in FIG. 2C, the refrigerant inlet header pipe 9 is connected to the refrigerant inlets 8A and 8A at one end of the pair of refrigerant pipes 8 and 8 by brazing or the like. As a result, the refrigerant is divided into the pair of refrigerant pipes 8 and 8 via the refrigerant inlet header pipe 9.

また、一対の冷媒管８，８の他方の端の冷媒出口８Ｂ，８Ｂには冷媒出口ヘッダー１０がロウ付け等により接続されている。一対の冷媒管８，８も耐圧を高めるため円筒状であることが好ましい。これにより、一対の冷媒管８，８を流れる冷媒は、冷媒出口ヘッダー１０を介して合流し外部に流出するようになっている。 Further, the refrigerant outlet header 10 is connected to the refrigerant outlets 8B and 8B at the other ends of the pair of refrigerant pipes 8 and 8 by brazing or the like. The pair of refrigerant pipes 8 and 8 are also preferably cylindrical in order to increase the pressure resistance. As a result, the refrigerant flowing through the pair of refrigerant pipes 8 and 8 merges through the refrigerant outlet header 10 and flows out to the outside.

また、第１及び第２のヘッダー管２，３の側面には、それぞれステンレス製熱交換器１００の本体を取り付け部に固定するための固定金具１１，１１が設けられている。 Further, fixing brackets 11 and 11 for fixing the main body of the stainless steel heat exchanger 100 to the mounting portion are provided on the side surfaces of the first and second header pipes 2 and 3, respectively.

ステンレス製熱交換器１００の主要構成部品である、水管１、第１のヘッダー管２、第１の蓋体２Ａ，２Ｂ、第２のヘッダー管３、第２の蓋体３Ａ，３Ｂ、水入口管４、水出口管５、仕切り羽６、支持棒体７、冷媒管８、冷媒入口ヘッダー管９、及び冷媒出口ヘッダー管１０は、すべてステンレス材で構成されている。 Water pipe 1, first header pipe 2, first lid 2A, 2B, second header pipe 3, second lid 3A, 3B, water inlet, which are the main components of the stainless steel heat exchanger 100. The pipe 4, the water outlet pipe 5, the partition blade 6, the support rod 7, the refrigerant pipe 8, the refrigerant inlet header pipe 9, and the refrigerant outlet header pipe 10 are all made of stainless steel.

このように、ステンレス製熱交換器１００よれば、ステンレス材の材料強度が銅材より高く、その肉厚を小さくできるので、軽量化と材料費の削減化が可能になる。 As described above, according to the stainless steel heat exchanger 100, the material strength of the stainless steel material is higher than that of the copper material, and the wall thickness thereof can be reduced, so that the weight and the material cost can be reduced.

また、第１及び第２のヘッダー管２，３の内部に仕切り羽６を設けて、水管１の水流路を第１及び第２のヘッダー管２，３の間で折り返すように構成したことで、水と冷媒との熱交換を促進し、銅製熱交換器に匹敵する熱交換効率を得ることができる。さらに、水管１、第１及び第２のヘッダー管２，３は円筒で構成されているので、管内を流れる水に対する耐圧を向上させることができる。 Further, by providing partition blades 6 inside the first and second header pipes 2 and 3, the water flow path of the water pipe 1 is configured to be folded back between the first and second header pipes 2 and 3. It promotes heat exchange between water and a refrigerant, and can obtain heat exchange efficiency comparable to that of a copper heat exchanger. Further, since the water pipes 1, 1st and 2nd header pipes 2 and 3 are formed of a cylinder, the pressure resistance to the water flowing in the pipes can be improved.

次に、２段ステンレス製熱交換器２００（２ユニット２段構成）について、図３及び図４に基づいて説明する。図３は、２段ステンレス製熱交換器２００を示す図であり、図３（ａ）はその平面図、図３（ｂ）はその正面図である。図４はこの２段ステンレス製熱交換器２００の側面図である。 Next, the two-stage stainless steel heat exchanger 200 (two-unit two-stage configuration) will be described with reference to FIGS. 3 and 4. 3A and 3B are views showing a two-stage stainless steel heat exchanger 200, FIG. 3A is a plan view thereof, and FIG. 3B is a front view thereof. FIG. 4 is a side view of the two-stage stainless steel heat exchanger 200.

２段ステンレス製熱交換器２００は上述のステンレス製熱交換器１００を上下２段に積み重ねたものである。図４に示すように、上下２段に積み重ねられた一対（２本）の第１のヘッダー管２の一端には水入口ヘッダー管１２が接続され、これらの第１のヘッダー管２の他方の端には水出口ヘッダー管１３が接続されている。 The two-stage stainless steel heat exchanger 200 is a stack of the above-mentioned stainless steel heat exchangers 100 in two upper and lower stages. As shown in FIG. 4, a water inlet header pipe 12 is connected to one end of a pair (two) of the first header pipes 2 stacked in two upper and lower stages, and the other of these first header pipes 2 is connected. A water outlet header pipe 13 is connected to the end.

これにより、水は水入口ヘッダー管１２を介して一対の第１のヘッダー管２にそれぞれ分流し、上述のように、複数の水管１を交互に逆方向に流れ、かつ第１及び第２のヘッダー管２，３の間で折り返されながら、水出口ヘッダー管１３を介して合流して外部に流出するようになっている。 As a result, the water is diverted to the pair of first header pipes 2 via the water inlet header pipe 12, respectively, and as described above, the water pipes 1 alternately flow in opposite directions, and the first and second head pipes 1 and 2 are used. While being folded back between the header pipes 2 and 3, they merge through the water outlet header pipe 13 and flow out to the outside.

また、図３及び図４に示すように、上下４段に積み重ねられた４本の冷媒管８の一端には、大型の冷媒入口ヘッダー管１４が接続され、これらの冷媒管８の他方の端には大型の冷媒出口ヘッダー管１５が接続されている。これにより、冷媒は大型の冷媒入口ヘッダー管１４を介して４本の冷媒管８にそれぞれ分流し、大型の冷媒出口ヘッダー管１５を介して合流して外部に流出するようになっている。 Further, as shown in FIGS. 3 and 4, a large refrigerant inlet header pipe 14 is connected to one end of four refrigerant pipes 8 stacked in four upper and lower stages, and the other end of these refrigerant pipes 8 is connected. A large refrigerant outlet header pipe 15 is connected to the pipe. As a result, the refrigerant is divided into four refrigerant pipes 8 via the large refrigerant inlet header pipe 14, merges through the large refrigerant outlet header pipe 15, and flows out to the outside.

また、２ユニットのステンレス製熱交換器１００を上下に重ねて保持するための保持金具１６がステンレス製熱交換器２００の側面に設けられている。 Further, a holding metal fitting 16 for holding the two units of the stainless steel heat exchanger 100 in an vertically stacked manner is provided on the side surface of the stainless steel heat exchanger 200.

このように、ステンレス製熱交換器１００を積み重ねて組み立てることにより、コンパクトな構成で熱交換能力を高めることができる。なお、ステンレス製熱交換器１００を３段以上に積み重ねて、多段ステンレス製熱交換器を構成することもできる。 By stacking and assembling the stainless steel heat exchangers 100 in this way, the heat exchange capacity can be enhanced in a compact configuration. It is also possible to stack the stainless steel heat exchangers 100 in three or more stages to form a multi-stage stainless steel heat exchanger.

１水管
２第１のヘッダー管
２Ａ，２Ｂ第１の蓋体
３第２のヘッダー管
３Ａ，３Ｂ第２の蓋体
４水入口管
５水出口管
６仕切り羽
７支持棒体
８冷媒管
９冷媒入口ヘッダー管
１０冷媒出口ヘッダー管
１１固定金具
１２水入口ヘッダー管
１３水出口ヘッダー管
１４大型の冷媒入口ヘッダー管
１５大型の冷媒出口ヘッダー管 1 Water pipe 2 1st header pipe 2A, 2B 1st lid 3 2nd header pipe 3A, 3B 2nd lid 4 Water inlet pipe 5 Water outlet pipe 6 Partition blade 7 Support rod 8 Refrigerator pipe 9 Refrigerator Inlet header pipe 10 Refrigerator outlet header pipe 11 Fixing bracket 12 Water inlet header pipe 13 Water outlet header pipe 14 Large refrigerant inlet header pipe 15 Large refrigerant outlet header pipe

Claims

Multiple cylindrical water pipes brazed to each other in the longitudinal direction,
A cylindrical first header pipe connected to one end of the plurality of water pipes,
A cylindrical second header pipe connected to the other end of the plurality of water pipes,
A water inlet pipe connected to one end of the first header pipe,
A water outlet pipe connected to the other end of the first header pipe,
The water flowing in from the water inlet pipe alternately flows in the opposite direction through the plurality of water pipes, and forms a water flow path that flows out from the water outlet pipe while being folded back between the first and second header pipes. , A plurality of disc-shaped partition blades that partition the inside of the first and second header pipes,
A pair of refrigerant pipes having a serpentine shape brazed on the upper surface and the back surface of the water pipes along the plurality of water pipes, respectively.
A refrigerant inlet header pipe connected to one end of the pair of refrigerant pipes,
A stainless steel heat exchanger comprising a refrigerant outlet header pipe connected to the other end of the pair of refrigerant pipes.

The stainless steel heat according to claim 1, wherein the plurality of disc-shaped partition blades are attached along the longitudinal direction of the support rod inserted into the first and second header tubes. Exchanger.