JP3054646B2 - Plate heat exchanger - Google Patents
Plate heat exchangerInfo
- Publication number
- JP3054646B2 JP3054646B2 JP2071578A JP7157890A JP3054646B2 JP 3054646 B2 JP3054646 B2 JP 3054646B2 JP 2071578 A JP2071578 A JP 2071578A JP 7157890 A JP7157890 A JP 7157890A JP 3054646 B2 JP3054646 B2 JP 3054646B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- heat transfer
- heat
- heat exchanger
- plates
- 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
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、給湯用の熱交換器等として用いられるプレ
ート式熱交換器に関するものである。Description: TECHNICAL FIELD The present invention relates to a plate heat exchanger used as a heat exchanger or the like for hot water supply.
プレート式熱交換器は、複数の伝熱プレート（以下プ
レートと称す）を積層してプレート相互間に熱媒体の流
路を形成したもので、給湯用に用いる場合は熱媒として
熱水を、冷媒として常温水を用い、熱水と常温水とがプ
レートを介して交互に流れるようにそれぞれの流路を形
成することによって、プレートを介して熱水と常温水と
の熱交換を行なう。A plate heat exchanger is a device in which a plurality of heat transfer plates (hereinafter, referred to as plates) are laminated to form a flow path of a heat medium between the plates. When used for hot water supply, hot water is used as a heat medium, Room-temperature water is used as a refrigerant, and heat flow between room-temperature water and room-temperature water is performed through the plate by forming respective flow paths such that the room-temperature water and room-temperature water alternately flow through the plate.
プレート（３）は、第３図に示す様に、対向配置した
二枚の耐圧フレーム（以下フレームと称す）（1a）（1
b）間に積層配置された後、フレーム（1a）（1b）及び
プレート（３）を相互にロー材（２）で固定される。プ
レート（３）の中央部には、プレス成形によって波曲状
にした伝熱部（６）が形成されており、隣り合った伝熱
部（６）（６）によって挟まれた空間が熱水あるいは常
温水の流路となる。例えば、流入口（７）から供給され
た常温水は流路（Ｏ）へ流路１つおきに流れ、流入口
（８）から供給された熱水はその間の流路（Ｐ）に流れ
る。As shown in FIG. 3, the plate (3) includes two pressure-resistant frames (hereinafter, referred to as frames) (1a) (1
After being stacked and arranged between the b), the frames (1a) (1b) and the plate (3) are fixed to each other with the brazing material (2). At the center of the plate (3), a heat transfer portion (6) formed into a wave shape by press molding is formed, and the space sandwiched between the adjacent heat transfer portions (6) and (6) is hot water. Or it becomes a flow path of room temperature water. For example, room temperature water supplied from the inflow port (7) flows every other channel to the flow path (O), and hot water supplied from the inflow port (8) flows to the flow path (P) therebetween.
また、プレート（３）の外縁部（９）を折り曲げて、
積層したときにプレート（３）同士が外縁部（９）によ
って相互に嵌り込むようにすると共に、隣り合った伝熱
部（６）（６）の接触部（10）、および、フレーム（1
a）（1b）とこれに接するプレート（3d）（3e）との接
触部（4a）（4b）をろう付け等によって一体化してい
る。Also, bend the outer edge (9) of the plate (3),
When laminated, the plates (3) are fitted into each other by the outer edge (9), and the contact portions (10) of the adjacent heat transfer portions (6), (6), and the frame (1).
a) The contact portions (4a) and (4b) between (1b) and the plates (3d) and (3e) in contact therewith are integrated by brazing or the like.
運転を止めて暫くすると、フレームを含むプレート式
熱交換器全体が熱水温度近くまで熱せられることがあ
る。このような状態で運転を再開すると、フレーム（1
a）と接するプレート（3d）は常温水の供給によって急
速に降温するが、フレーム（1a）は板厚が厚いためプレ
ート（3d）に比べて熱容量が大きく、しかも常温水とは
直接接することがないため降温するまでに時間がかか
り、その間、両者間に温度差が生じる。この温度差によ
って両者間に熱膨張差が生じる結果、その接触部（4a）
に熱応力が発生し、この熱応力はプレート（3d）に対し
て引っ張り応力として作用する。そして、運転の停止、
再開をくり返しによってこの熱応力が繰り返し作用する
結果、接触部（4a）およびプレート（3d）に疲労が生
じ、ろう付け等の剥れあるいはプレート自体の破損の原
因となることがあった。また、この熱応力はプレート
（3d）のひずみによって、隣り合ったプレート（3f）と
の接触部（10）にも作用し、上記と同様の悪影響をもた
らす。尚、熱応力はフレーム（1b）とこれに接するプレ
ート（3e）との接触部（4b）にも同様に発生する。If the operation is stopped for a while, the entire plate heat exchanger including the frame may be heated to a temperature close to the hot water temperature. When operation is resumed in such a state, the frame (1
The temperature of the plate (3d) in contact with a) drops rapidly due to the supply of room temperature water. Therefore, it takes time to lower the temperature, during which a temperature difference occurs between the two. As a result of this temperature difference, a thermal expansion difference occurs between the two, and the contact portion (4a)
The plate (3d) acts as a tensile stress on the plate (3d). And stop driving,
As a result of repeated thermal stresses caused by repeated restarts, fatigue occurs in the contact portion (4a) and the plate (3d), which may cause peeling such as brazing or damage to the plate itself. The thermal stress also acts on the contact portion (10) with the adjacent plate (3f) due to the strain of the plate (3d), and has the same adverse effect as described above. The thermal stress also occurs in the contact portion (4b) between the frame (1b) and the plate (3e) in contact therewith.
本発明は上記問題点に鑑みて提案されたもので、フレ
ームとプレート間に発生する熱応力を緩和すると共に、
熱応力によるプレート自体の破損を防止することによっ
てプレート式熱交換器の耐久性を向上させることをその
目的とする。The present invention has been proposed in view of the above problems, and, while reducing the thermal stress generated between the frame and the plate,
It is an object of the present invention to improve the durability of a plate heat exchanger by preventing the plate itself from being damaged by thermal stress.
本発明では、対向配置した二枚の耐圧フレーム間に、
波曲状の伝熱部を有する複数の伝熱プレートを積層配置
し、伝熱プレート間に形成される流路に熱媒と冷媒とを
流すことにより、伝熱プレートを介して熱媒と冷媒との
熱交換を行うプレート式熱交換器において、少なくとも
耐圧フレームと接する伝熱プレートの板厚を他の伝熱プ
レートの板厚よりも厚くした。In the present invention, between the two pressure-resistant frames disposed opposite to each other,
A plurality of heat transfer plates having a wave-shaped heat transfer portion are stacked and arranged, and a heat medium and a coolant are caused to flow through a flow path formed between the heat transfer plates. In the plate heat exchanger for performing heat exchange with the heat transfer plate, at least the thickness of the heat transfer plate in contact with the pressure-resistant frame is made larger than the thickness of the other heat transfer plates.
プレートの板厚の増加は、プレートの熱容量の増大と
剛性の強化になる。熱容量の増大は運転の再開時、常温
水によってプレートが降温されるまでの時間を遅らせ、
プレートとフレームとの温度差を実質的に縮める。その
結果、両者間の熱膨張差が縮まるため接触部に発生する
熱応力が緩和される。また、剛性の強化は両者間の熱膨
張差から生じる熱応力の低減を計り繰り返し応力に対す
る抵抗力を高めプレートの破損を防止すると共に、応力
によるプレートのひずみを小さくして、隣り合ったプレ
ートとの接触部に応力が伝達されることを防ぐ。Increasing the plate thickness results in an increase in the heat capacity and rigidity of the plate. The increase in heat capacity delays the time until the temperature of the plate is lowered by normal-temperature water when restarting operation,
Substantially reduce the temperature difference between the plate and the frame. As a result, the difference in thermal expansion between the two is reduced, so that the thermal stress generated in the contact portion is reduced. In addition, reinforcement of rigidity measures thermal stress generated from the difference in thermal expansion between the two, increases resistance to repeated stress and prevents plate breakage, reduces plate distortion due to stress, and reduces adjacent plate To prevent the stress from being transmitted to the contact portion.
本発明に係るプレート式熱交換器は、第１図に示す様
に、対向配置した二枚のフレーム（1a）（1b）間に積層
挾持された複数のプレート（３）の内、フレーム（1a）
（1b）と接するプレート（3a）（3b）の板厚を他のプレ
ート（3c）より厚くしたものである。プレート（3a）お
よび（3b）の板厚は、接触部（4a）及び（4b）で発生す
る熱応力の大きさ、プレート材質等を勘案して決定す
る。尚、他の構成は第３図に示すものと同一とし、同一
部位は同一符号で示す。As shown in FIG. 1, the plate heat exchanger according to the present invention comprises a frame (1a) of a plurality of plates (3) laminated and sandwiched between two frames (1a) and (1b) arranged opposite to each other. )
The plates (3a) and (3b) in contact with (1b) are made thicker than the other plates (3c). The thickness of the plates (3a) and (3b) is determined in consideration of the magnitude of the thermal stress generated at the contact portions (4a) and (4b), the material of the plate, and the like. The other configuration is the same as that shown in FIG. 3, and the same parts are denoted by the same reference numerals.
第２図はプレート（３）の平面を示す。プレート
（３）は四隅に開口（５）を有し、中央部にプレス成形
した波曲状の伝熱部（６）を有するもので、プレート
（３）とプレート（３′）とを交互に積層して、対向す
る伝熱部（６）（６）の波曲が交差した状態になるよう
にする。第１図は、この波曲が交差した部分の断面を示
すもので、第２図におけるプレート（３）（３′）のＩ
−Ｉ断面を示す。勿論、第２図に示すプレート形状は一
例であって、本発明においてはプレート形状は特に問わ
ない。FIG. 2 shows the plane of the plate (3). The plate (3) has openings (5) at four corners and a press-formed wavy heat transfer section (6) at the center. The plate (3) and the plate (3 ') are alternately arranged. Lamination is performed so that the wave curves of the heat transfer units (6) and (6) facing each other intersect. FIG. 1 shows a cross section of a portion where the waves intersect, and shows the I (I) of the plate (3) (3 ') in FIG.
1 shows a cross section I. Of course, the plate shape shown in FIG. 2 is an example, and the plate shape is not particularly limited in the present invention.
尚、本実施においては、フレーム（1a）（1b）と接す
るプレート（3a）（3b）のみの板厚を他のプレート（3
c）の板厚より厚くしたが、この理由は、プレートの板
厚の増加が熱応力の緩和に寄与する反面、伝熱効率を低
下させる一因となるため、板厚の増加および板厚を厚く
したプレートの枚数は極力少なくするのが望ましい。従
って、本実施例は、フレームと接するプレート（3a）お
よび（3b）のみの板厚を厚くすることによって、プレー
ト全体の伝熱効率を低下させることなく熱応力の緩和お
よびプレートの破損防止をし得るものとした。無論、他
のプレート（3c）の板厚を厚くしてもかまわない。In this embodiment, the thickness of only the plates (3a) and (3b) in contact with the frames (1a) and (1b) is changed to the other plates (3
c) The reason for this is that the thickness of the plate is increased because the increase in the thickness of the plate contributes to the reduction of the thermal stress, but also contributes to the decrease in the heat transfer efficiency. It is desirable to reduce the number of plates as small as possible. Therefore, in this embodiment, by increasing the plate thickness of only the plates (3a) and (3b) in contact with the frame, it is possible to alleviate the thermal stress and prevent the plate from being damaged without lowering the heat transfer efficiency of the entire plate. It was taken. Of course, the thickness of the other plate (3c) may be increased.
本発明によって以下の効果が得られる。 The following effects can be obtained by the present invention.
プレートは板を厚くすることによって熱容量が増大
するため、運転再開直後の耐圧フレームと、それに接し
たプレートとの温度差が実質的に縮められる。その結
果、接触部に発生する熱応力が緩和される。Since the heat capacity of the plate is increased by increasing the thickness of the plate, the temperature difference between the pressure-resistant frame immediately after the restart of operation and the plate in contact with the frame is substantially reduced. As a result, the thermal stress generated at the contact portion is reduced.
板厚の増加はプレートの剛性を高めるため、熱応力
によるプレートの破損が防止できる。The increase in the thickness increases the rigidity of the plate, so that the plate can be prevented from being damaged by thermal stress.
およびによって装置自体の耐久性が向上する。 This improves the durability of the device itself.
第１図は本発明に係るプレート式熱交換器の断面図、 第２図はプレートの平面図である。 第３図は従来のプレート式熱交換器の断面図である。 （1a）（1b）……耐圧フレーム （２）……ロー材 （3a）（３）……伝熱プレート （3b）（３）……伝熱プレート （3c）（３）……伝熱プレート FIG. 1 is a sectional view of a plate heat exchanger according to the present invention, and FIG. 2 is a plan view of a plate. FIG. 3 is a sectional view of a conventional plate heat exchanger. (1a) (1b)… pressure-resistant frame (2)… brazing material (3a) (3)… heat transfer plate (3b) (3)… heat transfer plate (3c) (3)… heat transfer plate
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F28F 3/00 - 3/08 F28D 9/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) F28F 3/00-3/08 F28D 9/02
Claims (1)
曲状の伝熱部を有する複数の伝熱プレートを積層配置
し、伝熱プレート間に形成される流路に熱媒と冷媒とを
流すことにより、伝熱プレートを介して熱媒と冷媒との
熱交換を行うプレート式熱交換器において、 少なくとも前記耐圧フレームと接する伝熱プレートの板
厚を他の伝熱プレートの板厚よりも厚くしたことを特徴
とするプレート式熱交換器。1. A plurality of heat transfer plates having a wave-shaped heat transfer portion are stacked and arranged between two pressure-resistant frames disposed opposite to each other, and a heat medium and a coolant are provided in a flow path formed between the heat transfer plates. In the plate heat exchanger performing heat exchange between the heat medium and the refrigerant through the heat transfer plate by flowing the heat transfer plate, at least the plate thickness of the heat transfer plate in contact with the pressure-resistant frame is changed to the plate thickness of another heat transfer plate. A plate heat exchanger characterized by having a greater thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2071578A JP3054646B2 (en) | 1990-03-20 | 1990-03-20 | Plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2071578A JP3054646B2 (en) | 1990-03-20 | 1990-03-20 | Plate heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03271697A JPH03271697A (en) | 1991-12-03 |
| JP3054646B2 true JP3054646B2 (en) | 2000-06-19 |
Family
ID=13464720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2071578A Expired - Lifetime JP3054646B2 (en) | 1990-03-20 | 1990-03-20 | Plate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3054646B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7283802B2 (en) | 2002-08-30 | 2007-10-16 | Sony Corporation | Remote control system |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19711258C2 (en) * | 1997-03-18 | 1999-09-02 | Behr Gmbh & Co | Stacked disc oil cooler |
| SE9702420L (en) * | 1997-06-25 | 1998-12-26 | Alfa Laval Ab | plate heat exchangers |
| US8181695B2 (en) | 2005-10-05 | 2012-05-22 | Dana Canada Corporation | Reinforcement for dish plate heat exchangers |
| EP2647941A1 (en) | 2012-04-05 | 2013-10-09 | Alfa Laval Corporate AB | Plate heat exchanger |
| JP6079410B2 (en) * | 2013-04-24 | 2017-02-15 | 株式会社ノーリツ | Plate heat exchanger |
| DK3112788T3 (en) * | 2015-07-01 | 2019-05-20 | Alfa Laval Corp Ab | PLATE HEAT EXCHANGE |
| US10465992B2 (en) * | 2018-03-16 | 2019-11-05 | Hamilton Sundstrand Corporation | Parting sheet in heat exchanger core |
-
1990
- 1990-03-20 JP JP2071578A patent/JP3054646B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7283802B2 (en) | 2002-08-30 | 2007-10-16 | Sony Corporation | Remote control system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03271697A (en) | 1991-12-03 |
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