JP3670725B2 - Plate heat exchanger - Google Patents
Plate heat exchanger Download PDFInfo
- Publication number
- JP3670725B2 JP3670725B2 JP22938595A JP22938595A JP3670725B2 JP 3670725 B2 JP3670725 B2 JP 3670725B2 JP 22938595 A JP22938595 A JP 22938595A JP 22938595 A JP22938595 A JP 22938595A JP 3670725 B2 JP3670725 B2 JP 3670725B2
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- Prior art keywords
- plate
- heat exchanger
- passage hole
- plate heat
- oval
- 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 - Fee Related
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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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
- F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
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- 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)
Description
【０００１】
【発明の属する技術分野】
本発明は、四隅に液の出入口となる通路孔を設けた複数枚のプレートを積層してなるプレート式熱交換器に関するものである。
【０００２】
【従来の技術】
一般に、プレート式熱交換器は、複数枚のプレートをガスケットを介して積層してプレート相互間に複数の流路を形成し、これら流路に異種の液を交互に流通して両液間でプレートを介して熱交換を行なっている。
【０００３】
このようなプレート式熱交換器においては、図３に示す如き、プレート（11）が使用されている。このプレート（11）は、矩形状金属板の四隅に液の出入口となる通路孔（12）を設け、その中間に凹凸形状をした伝熱面（13）を設けたもので、一側上下の通路孔（12）（12）を伝熱面（13）と連通し、かつ、他側上下の通路孔（12）（12）を伝熱面（13）と２重に遮断するように合成ゴム等の耐熱性を有する弾性材から製作されたガスケット（14）を装着し、これを交互に平面上で１８０°回転させて、即ち、上下反転させて積層することにより複数の流路を有するプレート式熱交換器を形成している。
【０００４】
【発明が解決しようとする課題】
ところで、この種のプレート式熱交換器においては、処理流量が大きい場合には、通路孔（12）での流速に限界があるため、通路孔（12）の開口面積を大きく設計する必要がある。ところが、従来のプレート式熱交換器は、プレート（11）の通路孔（12）の平面形状が円形であるため、通路孔（12）の開口面積を大きくするためには、図４に示すように、通路孔（12）の径を大きくしなければならない。しかし、通路孔（12）の径を大きくすれば、通路孔（12）の縦寸法も必然的に大きくなり、図４に示すように、同じ寸法のプレート素材を用いても、伝熱面（13）の縦方向の寸法が減少するため、通路孔（12）の径が小さい図３に示すプレート（11）に比べ伝面収率（素材面積に対する伝熱面積の割合）が大幅に低下する。そのため、必要とする伝熱面積を確保するためには、プレート（11）の枚数を増枚しなければならず、コストの増大につながるという問題があった。
【０００５】
そこで、斯かる問題を解決するため、図５に示すように、プレート（11）の四隅に縦方向（プレート両側周縁と平行方向）よりも横方向（プレート上下周縁と平行方向）で大きな開口寸法を有する長円形の通路孔（12）を設けている。これでは、長円形の通路孔（12）の縦寸法が図３に示した円形の通路孔（12）と同じであるが、幅寸法が大きいため、伝熱面（13）の縦方向の寸法を減少させずに大きな開口面積を確保することができる。これにより、大きな処理流量に対応できるとともに、伝面収率の低下を防ぐことが可能である。しかし、長円形の通路孔（12）の長手の中心線が横方向に配置されているため、通路孔（12）の縁からプレート（11）の周縁に至るプレート周縁部（15）に幅の狭い部分（Ｓ）が長いスパン（Ｐ）にわたって存在する。そのため、プレート周縁部（15）の機械的強度が著しく低下してプレート（11）の取扱い上で損傷を引起こすとともに、このプレート（11）に大きな内圧がかかった場合には、長いスパン（Ｐ）にわたって存在するプレート周縁部（15）の幅の狭い部分（Ｓ）が変形してシール性能の低下を招く問題があった。
【０００６】
本発明は、プレート周縁部の強度向上と伝面収率の向上を両立させることを目的とする。
【０００７】
【課題を解決するための手段】
前述した目的を達成するために、本発明は、プレートの四隅に設けられた通路孔の平面形状が縦方向よりも横方向で大きな開口寸法を有する長円形あるいは概長円形であって、その長手の中心線が横方向に対して任意の角度で回転して配置されている。
【０００８】
本発明によれば、プレートの四隅に設けられた通路孔の平面形状を縦方向よりも横方向で大きな開口寸法を有する長円形あるいは概長円形にするとともに、その長手の中心線を横方向に対して任意の角度で回転して配置させているから、大きな処理流量を確保しながら伝面収率を大幅に向上することができるととに、通路孔の縁からプレートの周縁に至るプレート周縁部の幅の狭い部分を少なくすることができる。
【０００９】
【発明の実施の形態】
以下、本発明のプレート式熱交換器を図面に示す実施の形態に基づいて説明する。
【００１０】
図１は本発明のプレート式熱交換器において使用されるプレート（１）を示すものである。このプレート（１）は、矩形状金属板の四隅に液の出入口となる通路孔（２）を設け、この通路孔（２）の平面形状が縦方向よりも横方向で大きな開口寸法を有する長円形であって、その長手の中心線が上側左右の通路孔（２）（２）はプレート（１）の中央部から両側方に向って斜降し、かつ、下側左右の通路孔（２）（２）はプレート（１）の両側方から中央部に向って斜降するように横方向に対して任意の角度で回転して配置されている。このプレート（１）の中間には、凹凸形状をした伝熱面（３）が設けられるとともに、一側上下の通路孔（２）（２）を伝熱面（３）と連通し、かつ、他側上下の通路孔（２）（２）を伝熱面（３）と２重に遮断するように合成ゴム等の耐熱性を有する弾性材から製作されたガスケット（４）を装着している。
【００１１】
このようにプレート（１）の四隅に設けた通路孔（２）の平面形状を縦方向よりも横方向で大きな開口寸法を有する長円形としたことにより、図５に示した従来例とほぼ同等の伝面収率を確保することができる。即ち、大きな処理流量を確保するために伝面収率を犠牲にして通路孔（12）の径を大きく設計していた図４に示した従来例よりも同じ処理流量を確保しながら伝面収率を大幅に向上させることが可能となった。
【００１２】
また、長円形の平面形状を有する通路孔（２）をその長手の中心線を横方向に対して任意の角度で回転させて配置することにより、図５に示した従来例で問題となっていた長いスパン（Ｐ）にわたって存在していたプレート周縁部（５）の幅の狭い部分（Ｓ）を少なくすることができ、プレート周縁部（５）の機械的強度を向上するとともに、大きな内圧でも変形しない構造とすることできる。
【００１３】
さらに、図５に示した従来例に比べプレート（１）の中央部に向っての通路孔（２）の断面ぬれ長さ（Ｌ）が大きいため、液がプレート（１）の中央部に流れ易くなり、これにより偏流が減少して伝熱性能の向上が図れる。
【００１４】
図２は本発明の他の実施の形態を示すもので、プレート（１）の四隅に設けられた液の出入口となる長円形の平面形状を有する通路孔（２）の長手の中心線を、図１に示した実施の形態とは逆の方向、即ち、上側左右の通路孔（２）（２）はプレート（１）の両側方から中央部に向って斜降し、かつ、下側左右の通路孔（２）（２）はプレート（１）の中央部から両側方に向って斜降するように横方向に対して任意の角度で回転させたものであり、図１に示した実施の形態と同様の伝熱収率や機械的強度向上効果を有する。
【００１５】
尚、以上の実施の形態では、通路孔（２）の平面形状が長円形の場合について説明したが、通路孔（２）の平面形状は概長円形でもよい。
【００１６】
【発明の効果】
以上説明したように、本発明によれば、プレートの四隅に設けられた通路孔の平面形状を縦方向よりも横方向で大きな開口寸法を有する長円形あるいは概長円形にするとともに、その長手の中心線を横方向に対して任意の角度で回転して配置させているから、大きな処理流量を確保しながら伝面収率を大幅に向上することができるとともに、通路孔の縁からプレートの周縁に至るプレート周縁部の幅の狭い部分を少なくすることができ、これによりプレート周縁部の機械的強度を向上して大きな内圧でも変形しない構造とすることできるという優れた効果を有する。
【００１７】
また、プレートの中央部に向っての通路孔の断面ぬれ長さが大きいため、液がプレートの中央部に流れ易くなり、偏流が減少して伝熱性能の向上が図れるという優れた効果を有する。
【図面の簡単な説明】
【図１】本発明の実施の形態のプレート式熱交換器のプレートを示す平面図である。
【図２】本発明の他の実施の形態のプレート式熱交換器のプレートを示す平面図である。
【図３】従来のプレート式熱交換器のプレートを示す平面図である。
【図４】従来のプレート式熱交換器のプレートを示す平面図である。
【図５】従来のプレート式熱交換器のプレートを示す平面図である。
【符号の説明】
１ プレート
２ 通路孔
３ 伝熱面
４ ガスケット
５ プレート周縁部
Ｌ 断面ぬれ長さ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate-type heat exchanger formed by laminating a plurality of plates having passage holes serving as liquid inlets and outlets at four corners.
[0002]
[Prior art]
In general, a plate heat exchanger is formed by laminating a plurality of plates via gaskets to form a plurality of flow paths between the plates, and dissipating different liquids alternately in these flow paths between the two liquids. Heat exchange is performed through the plate.
[0003]
In such a plate heat exchanger, a plate (11) as shown in FIG. 3 is used. This plate (11) is provided with passage holes (12) that serve as liquid inlets and outlets at the four corners of a rectangular metal plate, and an uneven heat transfer surface (13) in the middle. Synthetic rubber so that the passage holes (12) and (12) communicate with the heat transfer surface (13), and the upper and lower passage holes (12) and (12) are double-blocked from the heat transfer surface (13). A plate having a plurality of flow paths by attaching gaskets (14) made of an elastic material having heat resistance such as, and alternately rotating them 180 degrees on a plane, that is, turning them upside down. A heat exchanger is formed.
[0004]
[Problems to be solved by the invention]
By the way, in this kind of plate heat exchanger, when the processing flow rate is large, there is a limit to the flow velocity in the passage hole (12), so it is necessary to design the opening area of the passage hole (12) to be large. . However, in the conventional plate heat exchanger, since the planar shape of the passage hole (12) of the plate (11) is circular, in order to increase the opening area of the passage hole (12), as shown in FIG. In addition, the diameter of the passage hole (12) must be increased. However, if the diameter of the passage hole (12) is increased, the vertical dimension of the passage hole (12) inevitably increases, and even if a plate material having the same dimensions is used as shown in FIG. Since the vertical dimension of 13) decreases, the surface transfer yield (ratio of heat transfer area to material area) is significantly lower than the plate (11) shown in FIG. 3 where the diameter of the passage hole (12) is small. . Therefore, in order to secure the necessary heat transfer area, the number of plates (11) must be increased, leading to an increase in cost.
[0005]
Therefore, in order to solve such a problem, as shown in FIG. 5, the opening size is larger in the lateral direction (parallel to the upper and lower peripheral edges of the plate) than in the vertical direction (parallel to the peripheral edges of the plates) at the four corners of the plate (11). An oval passage hole (12) having In this case, the vertical dimension of the oval passage hole (12) is the same as that of the circular passage hole (12) shown in FIG. 3, but since the width dimension is large, the vertical dimension of the heat transfer surface (13). A large opening area can be ensured without reducing the above. Thereby, it is possible to cope with a large processing flow rate and to prevent a decrease in the transmission yield. However, since the longitudinal center line of the oval passage hole (12) is arranged in the lateral direction, the width of the plate periphery (15) extending from the edge of the passage hole (12) to the periphery of the plate (11) A narrow portion (S) exists over a long span (P). Therefore, the mechanical strength of the plate peripheral portion (15) is remarkably lowered to cause damage in handling the plate (11). When a large internal pressure is applied to the plate (11), a long span (P ), The narrow portion (S) of the plate peripheral portion (15) existing over the surface is deformed, resulting in a decrease in sealing performance.
[0006]
An object of this invention is to make the improvement of the intensity | strength of a plate peripheral part, and the improvement of a propagation yield compatible.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides a planar shape of the passage hole provided at the four corners of the plate which is an oval or a substantially oval having a larger opening dimension in the lateral direction than in the longitudinal direction. The center line is rotated at an arbitrary angle with respect to the horizontal direction.
[0008]
According to the present invention, the planar shape of the passage holes provided at the four corners of the plate is made into an oval or an almost oval shape having a larger opening dimension in the horizontal direction than in the vertical direction, and the center line of the longitudinal direction is set in the horizontal direction. Since it is arranged to rotate at an arbitrary angle, the transmission yield can be greatly improved while ensuring a large processing flow rate, and the plate periphery from the edge of the passage hole to the periphery of the plate The narrow part of the part can be reduced.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a plate heat exchanger of the present invention will be described based on embodiments shown in the drawings.
[0010]
FIG. 1 shows a plate (1) used in the plate heat exchanger of the present invention. This plate (1) is provided with passage holes (2) serving as liquid inlets and outlets at the four corners of a rectangular metal plate, and the planar shape of the passage hole (2) has a larger opening dimension in the horizontal direction than in the vertical direction. The upper and left passage holes (2) and (2) have a circular center line, and the upper and left passage holes (2) and (2) are inclined downward from the center of the plate (1) toward both sides, and the lower left and right passage holes (2 ) (2) is arranged to rotate at an arbitrary angle with respect to the lateral direction so as to incline toward the center from both sides of the plate (1). An uneven heat transfer surface (3) is provided in the middle of the plate (1), and upper and lower passage holes (2) and (2) communicate with the heat transfer surface (3), and A gasket (4) made of a heat-resistant elastic material such as synthetic rubber is mounted so as to double the upper and lower passage holes (2) and (2) from the heat transfer surface (3). .
[0011]
Thus, the planar shape of the passage hole (2) provided at the four corners of the plate (1) is an oval having a larger opening dimension in the horizontal direction than in the vertical direction, so that it is substantially equivalent to the conventional example shown in FIG. It is possible to ensure the propagation yield of. In other words, in order to ensure a large processing flow rate, the surface yield is reduced while ensuring the same processing flow rate as in the conventional example shown in FIG. It became possible to improve the rate significantly.
[0012]
Further, by arranging the passage hole (2) having an oval planar shape by rotating its longitudinal center line at an arbitrary angle with respect to the lateral direction, there is a problem in the conventional example shown in FIG. The narrow portion (S) of the plate peripheral edge (5) existing over a long span (P) can be reduced, and the mechanical strength of the plate peripheral edge (5) can be improved, and even with a large internal pressure It can be set as the structure which does not deform | transform.
[0013]
Furthermore, since the cross-sectional wetting length (L) of the passage hole (2) toward the center of the plate (1) is larger than that of the conventional example shown in FIG. 5, the liquid flows to the center of the plate (1). As a result, drift is reduced and heat transfer performance can be improved.
[0014]
FIG. 2 shows another embodiment of the present invention. The longitudinal center line of the passage hole (2) having an oval planar shape serving as a liquid inlet / outlet provided at the four corners of the plate (1) is shown in FIG. The direction opposite to the embodiment shown in FIG. 1, that is, the upper left and right passage holes (2) and (2) are slanted from both sides of the plate (1) toward the center, and lower left and right The passage holes (2) and (2) are rotated at an arbitrary angle with respect to the lateral direction so as to incline toward both sides from the center of the plate (1), and are shown in FIG. It has the same heat transfer yield and mechanical strength improvement effect as the embodiment.
[0015]
In addition, although the above embodiment demonstrated the case where the planar shape of the passage hole (2) was an ellipse, the planar shape of the passage hole (2) may be a substantially oval shape.
[0016]
【The invention's effect】
As described above, according to the present invention, the planar shape of the passage holes provided at the four corners of the plate is made into an oval or an almost oval having a larger opening dimension in the lateral direction than in the longitudinal direction, and Since the center line is rotated at an arbitrary angle with respect to the transverse direction, the surface yield can be greatly improved while securing a large processing flow rate, and the edge of the plate can be improved from the edge of the passage hole. As a result, it is possible to reduce the narrow portion of the peripheral edge of the plate, thereby improving the mechanical strength of the peripheral edge of the plate, thereby providing an excellent effect that the structure does not deform even with a large internal pressure.
[0017]
Moreover, since the cross-sectional wetting length of the passage hole toward the central portion of the plate is large, the liquid easily flows to the central portion of the plate, and there is an excellent effect that the drift is reduced and the heat transfer performance can be improved. .
[Brief description of the drawings]
FIG. 1 is a plan view showing a plate of a plate heat exchanger according to an embodiment of the present invention.
FIG. 2 is a plan view showing a plate of a plate heat exchanger according to another embodiment of the present invention.
FIG. 3 is a plan view showing a plate of a conventional plate heat exchanger.
FIG. 4 is a plan view showing a plate of a conventional plate heat exchanger.
FIG. 5 is a plan view showing a plate of a conventional plate heat exchanger.
[Explanation of symbols]
1
Claims (1)
プレートの四隅に設けられた通路孔の平面形状が縦方向よりも横方向で大きな開口寸法を有する長円形あるいは概長円形であって、その通路孔の長手の中心線が横方向に対して任意の角度で回転して配置されていることを特徴とするプレート式熱交換器。In a plate heat exchanger formed by laminating a plurality of plates with passage holes serving as liquid inlets and outlets at the four corners,
The planar shape of the passage hole provided at the four corners of the plate is an oval or a substantially oval shape having a larger opening dimension in the lateral direction than in the longitudinal direction, and the longitudinal center line of the passage hole is arbitrary with respect to the lateral direction. A plate heat exchanger, wherein the plate heat exchanger is arranged rotated at an angle of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22938595A JP3670725B2 (en) | 1995-09-06 | 1995-09-06 | Plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22938595A JP3670725B2 (en) | 1995-09-06 | 1995-09-06 | Plate heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0972685A JPH0972685A (en) | 1997-03-18 |
| JP3670725B2 true JP3670725B2 (en) | 2005-07-13 |
Family
ID=16891366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22938595A Expired - Fee Related JP3670725B2 (en) | 1995-09-06 | 1995-09-06 | Plate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3670725B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6681844B1 (en) | 1998-10-15 | 2004-01-27 | Ebara Corporation | Plate type heat exchanger |
| DE102004036951A1 (en) | 2003-08-01 | 2005-05-25 | Behr Gmbh & Co. Kg | Heat exchanger used as an oil cooler in vehicles has plates with profiles and contact sites structured so that the flow of a first and second medium between the plates from a supply line to a discharge line does not follow a linear path |
| ES2234414B1 (en) * | 2003-09-24 | 2006-11-01 | Valeo Termico, S.A. | HEAT EXCHANGER OF STACKED PLATES. |
| JP5106453B2 (en) | 2009-03-18 | 2012-12-26 | 三菱電機株式会社 | Plate heat exchanger and refrigeration air conditioner |
| CN102261861B (en) * | 2011-07-16 | 2013-07-31 | 山东安源水产股份有限公司 | Plate-type heat exchanger and application thereof to mariculture |
| DK2728293T3 (en) * | 2012-10-30 | 2017-02-27 | Alfa Laval Corp Ab | HEAT EXCHANGER PLATE AND PLATE HEAT EXCHANGERS INCLUDING SUCH A HEAT EXCHANGE PLATE |
| WO2014067674A1 (en) | 2012-10-30 | 2014-05-08 | Alfa Laval Corporate Ab | Gasket and assembly |
-
1995
- 1995-09-06 JP JP22938595A patent/JP3670725B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0972685A (en) | 1997-03-18 |
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