JP3815921B2 - Liquid membrane plate heat exchanger and liquid distributor used therefor - Google Patents

Liquid membrane plate heat exchanger and liquid distributor used therefor Download PDF

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JP3815921B2
JP3815921B2 JP18543499A JP18543499A JP3815921B2 JP 3815921 B2 JP3815921 B2 JP 3815921B2 JP 18543499 A JP18543499 A JP 18543499A JP 18543499 A JP18543499 A JP 18543499A JP 3815921 B2 JP3815921 B2 JP 3815921B2
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liquid
plate
heat exchanger
fluid
plate heat
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JP2001012879A (en
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知行 内村
利男 松原
晃好 鈴木
智芳 入江
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荏原冷熱システム株式会社
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62—Absorption based systems

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Description

【０００１】
【発明の属する技術分野】
本発明は、液膜式プレート熱交換器に係り、特に、プレートの面を伝熱面として伝熱面に沿って流体を流す液膜式プレート熱交換器とそのプレートの外面へ液を流すための液分布器に関する。
【０００２】
【従来の技術】
シェルアンドチューブ型の熱交換器は、伝熱面積に比して容積がまだまだ大きく、吸収冷凍機の容積、設置面積をより縮小しようとすれば、たとえばプレート式熱交換器などの採用が検討される。特に、従来から吸収冷凍機の蒸発器、吸収器、凝縮器、低温再生器としては、液膜式のプレート熱交換器が好適であると考えられている。
液膜式のプレート熱交換器の技術的課題の一つとして、プレート内部及び液膜側への流体の供給が挙げられる。このうち、プレート内部への流体の供給については、いくつかの方法が提案されており、また、液膜側への流体の供給については、例えば、プレート上面に一体に形成したスリットを有する液分布器が知られているが、この液分布器は製作工数がかかり、必ずしも実用には適さない。
また、液が降下するにしたがって分布が不均一となるような場合、中途で再分布させようとする場合には適用できない。
【０００３】
【発明が解決しようとする課題】
本発明は、上記従来技術に鑑み、簡単な形状で、液膜側の流体を均一に分布でき、さらに液膜側の流体が一種類でない場合でも問題なく使用できる液分布器を備えた液膜式のプレート熱交換器と液分布器を提供することを課題とする。
【０００４】
【課題を解決するための手段】
上記課題を解決するために、本発明では、内側の密閉された空間を第１流体の通路とし、外面に沿って第２流体を流下させて、第１流体と第２流体の間で熱交換させるプレートを、伝熱面同士が互いに向い合うように、所定の隙間を隔てて複数配置した液膜式プレート熱交換器において、前記プレートの外面に、長方形でばね性を有する板状体を、ほぼ中央で曲げて側断面形状を逆Ｕ字又はＶ字型とし、その両端部にほぼ水平の縁部を設け、該縁部に液体が流下するスリットを設けた液分布器を配備することとしたものである。
前記液膜式プレート熱交換器において、プレートの外面には、液分布器が配備される凹部が形成されているのがよく、また、前記液分布器は、プレート外面に複数個配備され、最下部を液回収器とすることができる。
また、本発明では、長方形でばね性を有する板状体を、ほぼ中央で曲げて側断面形状をＵ字又はＶ字型とし、その両端部にほぼ直角の縁部を設け、該縁部にスリットを設けた液膜式プレート熱交換器に用いる液分布器としたものである。
【０００５】
【発明の実施の形態】
本発明では、液膜式プレート式熱交換器において、ばね性を有する板を曲げ板加工して形成し、曲げ板の両端にスリットを設けた液分布器を用いており、プレート外面へ自力でも固定されるが、ろう付けしてもよい。また、両端に設けたスリットの大きさと数によって、液の分布が調整でき、曲げ板の間隙が断熱の効果を有するので、左右に別種の液が溜まっても熱交換しないようになっている。この時、プレート側には位置決めのための溝（凹部)を設けておくのが良い。
また、液分布器の開口端は、必要な場合は閉止板を挿入して液の流出を防止できる。なお、この閉止板は、曲げ板と一体として成形してもよい。
さらに、液分布器は、プレート表面に複数設け、上部のみならず中途に設けてもよい。また、液分布器をスリットを切らないで最下部に設けると、液回収器としても使用できる。この時は、回収した液を排出する排出口を適当に設けると、下部の適当な位置で液膜側の流体を回収できる。
【０００６】
次に、図面を用いて本発明を詳細に説明する。
図１は、本発明の液膜式プレート熱交換器の一例を示す構成図であり、(ａ)は正面図、（ｂ）は（ａ）のＡ−Ａ断面図である。
図１では、二組の流体を同時に熱交換させる形式の液膜式プレート熱交換器１を示しており、２、２’はプレートで、内側をそれぞれ別の流体が流体導入部７、７’から通り、また、プレート２、２’外面をそれぞれ別の流体が流体導入路９、９’から供給されている。
６、６’、８、８’は、それぞれ７、７’、９、９’の導入路を形成するためのプレート間を通す連通管であり、１０は供給支路である。
プレート２、２’の向い合う二つの面では、互いに違う流体が供給されるため、これらが混ざり合わないように、液分布器３が４段設けられている。
【０００７】
図２に、本発明の液分布器の一例の構成図を示し、（ａ）は正面図、（ｂ）は平面図、（ｃ）は側面図である。図３は、この液分布器をプレート間に挿入した場合の断面説明図である。この時、プレート２、２’には位置決めのための溝１１を設けておくのが良い。図において、４は縁部、５はスリットである。
上部から供給された液は、プレート２、２’と液分布器３の間の隙間にたまり、液分布器３に設けられたスリット５からプレート面に供給される。この時、供給された流体は金属面を介して接していない（間に間隙１２がある)ため、互いに熱交換することはない。
【０００８】
この液分布器はろう付けなどでプレートに固定されてもよいが、ばね性を有しているため、挿入するだけでもよい。また、ろう付けする場合であっても治具等無しで位置決めが出来るため工数を削減できる。
また、図１のような熱交換器を成形する場合、プレートを積層して真空炉で溶接する工法を取ると、プレート間にスペーサーを挿入する必要があるため、プレートの中間にはろう付けするまで何者も挿入できない。したがって、本発明の液分布器のように後から挿入でき、ろう付け等の必要が無い液分布器が必要となる。
図４に、本発明の液分布器の他の例の構成図を示し、（ａ）は正面図、（ｂ）は平面図、（ｃ）は側面図である。このように液分布器３の両端のスリット５を大きくすると、液の分布する範囲を限定し、無効な液膜を作らないように出来る。
【０００９】
図５に、本発明の液分布器の別の例の構成図を示し、（ａ）は正面図、（ｂ）は平面図、（ｃ）は側面図、（ｄ）は展開図、（ｅ）は斜視図である。
本発明の液分布器では、必要に応じて、分布器の開口端は、閉止板で閉止することが出来る。図５では、閉止板１３と液分布器３を一体として形成している。
図６に本発明の液分布器のプレート上への取付けの別の例の説明図を示す。
図６は、液分布器３を複数、斜めにプレート２に取り付け、分布器として使用する例を示す。図６ではプレート２に斜めに溝を切り、これに沿って複数の分布器３を取り付けている。このように取り付けることで、液膜側の流体を左右に振って伝熱効率を向上させることができる。
【００１０】
図７に、本発明の液分布器を液回収器として使用する場合の説明図を示し、（ａ）は正面図、（ｂ）は平面図、（ｃ）は側面図を示す。
この場合、液を滴下する位置にのみ大き目のスリット５、５’を設ける。なお、二組の流体を同時に熱交換するものである場合、その滴下位置を変えることによって別の位置に液を振り分けることが可能である。
また、必要に応じてスリットを設けない分布器を斜めに取り付けることにより、液を一方に排出することも可能である。
【００１１】
【発明の効果】
本発明によれば、液膜式プレート熱交換器において、プレート間に液膜側の流体を均一に分布出来る、安価な液分布器を用いることができた。
また、この液分布器は、ばね性を有して曲げ板加工しており、プレート間に自力でも固定でき、スリットの大きさと数によって、液分布を容易に調節でき、また、左右が間隙を有しているので、熱交換せず、別々の液体を通すことができる。
【図面の簡単な説明】
【図１】本発明の液膜式プレート熱交換器の一例を示す構成図で、(ａ)正面図、（ｂ）（ａ）のＡ−Ａ断面図。
【図２】本発明の液分布器の一例を示す構成図で、（ａ）正面図、（ｂ）平面図、（ｃ）側面図。
【図３】本発明の液分布器を使用した場合の断面説明図。
【図４】本発明の液分布器の他の例を示す構成図で、（ａ）正面図、（ｂ）平面図、（ｃ）側面図。
【図５】本発明の液分布器の別の例を示す構成図で、（ａ）正面図、（ｂ）平面図、（ｃ）側面図、（ｄ）展開図、（ｅ）斜視図。
【図６】本発明の液分布器をプレート上に取付けた他の例の説明図。
【図７】本発明の液分布器を液回収器として使用する説明図で、（ａ）正面図、（ｂ）平面図、（ｃ）側面図。
【符号の説明】
１：液膜式プレート熱交換器、２：プレート、３：液分布器、４：縁部、５：、５’：スリット、６、６’：第一流体連通管、７、７’：第一流体導入路、８、８’：第２流体連通管、９、９’：第２流体導入管、１０：供給支路、１１：溝（凹部）、１２：間隙、１３：閉止板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid film type plate heat exchanger, and more particularly to a liquid film type plate heat exchanger that uses a plate surface as a heat transfer surface to flow fluid along the heat transfer surface and the liquid to the outer surface of the plate. This relates to a liquid distributor.
[0002]
[Prior art]
Shell-and-tube heat exchangers still have a large volume compared to the heat transfer area, and for example, adoption of a plate heat exchanger is considered if the capacity and installation area of the absorption refrigerator are to be further reduced. The In particular, it has been conventionally considered that a liquid film type plate heat exchanger is suitable as an evaporator, an absorber, a condenser, and a low temperature regenerator of an absorption refrigerator.
One of the technical problems of the liquid film type plate heat exchanger is supply of fluid to the inside of the plate and the liquid film side. Among these, several methods have been proposed for supplying fluid to the inside of the plate, and for supplying fluid to the liquid film side, for example, a liquid distribution having a slit integrally formed on the upper surface of the plate. Although the vessel is known, this liquid distributor requires a lot of manufacturing steps and is not necessarily suitable for practical use.
In addition, when the distribution becomes non-uniform as the liquid descends, it cannot be applied to the case of redistribution midway.
[0003]
[Problems to be solved by the invention]
In view of the above-described prior art, the present invention provides a liquid film provided with a liquid distributor that can be uniformly distributed with a simple shape and can be used without problems even when the liquid film side fluid is not one kind. It is an object to provide a plate heat exchanger and a liquid distributor.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the present invention, the inner sealed space is used as a passage for the first fluid, the second fluid flows down along the outer surface, and heat is exchanged between the first fluid and the second fluid. In the liquid film type plate heat exchanger in which a plurality of plates are arranged with a predetermined gap therebetween so that the heat transfer surfaces face each other, a rectangular plate-like body having a spring property is provided on the outer surface of the plate. A liquid distributor having a substantially U-shaped or V-shaped side cross-sectional shape bent at substantially the center, provided with substantially horizontal edges at both ends thereof, and slits through which the liquid flows down at the edges; It is a thing.
In the liquid film type plate heat exchanger, the outer surface of the plate is preferably formed with a recess in which the liquid distributor is disposed, and a plurality of the liquid distributors are disposed on the outer surface of the plate. The lower part can be a liquid collector.
Further, in the present invention, a rectangular plate-like body having a spring property is bent substantially at the center to have a U-shaped or V-shaped side cross-sectional shape, and substantially perpendicular edges are provided at both ends thereof. The liquid distributor is used in a liquid film plate heat exchanger provided with a slit.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, in the liquid film type plate heat exchanger, a plate having a spring property is formed by bending a plate, and a liquid distributor having slits at both ends of the bent plate is used. Fixed, but may be brazed. Further, the distribution of the liquid can be adjusted by the size and number of slits provided at both ends, and the gap between the bending plates has a heat insulating effect, so that heat exchange is not performed even if different types of liquid accumulate on the left and right. At this time, it is preferable to provide a groove (concave portion) for positioning on the plate side.
Moreover, the opening end of the liquid distributor can prevent the outflow of liquid by inserting a closing plate if necessary. Note that the closing plate may be formed integrally with the bending plate.
Furthermore, a plurality of liquid distributors may be provided on the plate surface, and may be provided not only in the upper part but also in the middle. Further, if the liquid distributor is provided at the lowermost part without cutting the slit, it can also be used as a liquid recovery device. At this time, if a discharge port for discharging the recovered liquid is appropriately provided, the fluid on the liquid film side can be recovered at an appropriate position below.
[0006]
Next, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a configuration diagram illustrating an example of a liquid film plate heat exchanger according to the present invention, in which (a) is a front view and (b) is a cross-sectional view taken along line AA of (a).
FIG. 1 shows a liquid film plate heat exchanger 1 of a type in which two sets of fluids are subjected to heat exchange at the same time. 2, 2 ′ are plates, and different fluids are fluid introduction parts 7, 7 ′ on the inside. Further, different fluids are supplied from the fluid introduction passages 9 and 9 ′ on the outer surfaces of the plates 2 and 2 ′, respectively.
Reference numerals 6, 6 ', 8, and 8' denote communication pipes that pass between the plates for forming introduction paths for 7, 7 ', 9, and 9', respectively, and 10 denotes a supply branch.
Since two different fluids are supplied to the two faces of the plates 2 and 2 'facing each other, four stages of liquid distributors 3 are provided so that they do not mix.
[0007]
FIG. 2 shows a configuration diagram of an example of the liquid distributor of the present invention, where (a) is a front view, (b) is a plan view, and (c) is a side view. FIG. 3 is a cross-sectional explanatory view when this liquid distributor is inserted between the plates. At this time, it is preferable to provide grooves 11 for positioning on the plates 2 and 2 '. In the figure, 4 is an edge, and 5 is a slit.
The liquid supplied from the upper part accumulates in a gap between the plates 2, 2 ′ and the liquid distributor 3, and is supplied to the plate surface from the slit 5 provided in the liquid distributor 3. At this time, since the supplied fluids are not in contact with each other through the metal surface (there is a gap 12 between them), they do not exchange heat with each other.
[0008]
Although this liquid distributor may be fixed to the plate by brazing or the like, it has a spring property and may be simply inserted. In addition, even when brazing, man-hours can be reduced because positioning can be performed without using a jig or the like.
In addition, when forming a heat exchanger as shown in FIG. 1, if a method of laminating plates and welding them in a vacuum furnace is taken, it is necessary to insert a spacer between the plates, so brazing between the plates No one can insert until. Therefore, there is a need for a liquid distributor that can be inserted later and that does not require brazing or the like, like the liquid distributor of the present invention.
FIG. 4 shows a configuration diagram of another example of the liquid distributor of the present invention, where (a) is a front view, (b) is a plan view, and (c) is a side view. Thus, if the slits 5 at both ends of the liquid distributor 3 are enlarged, the range in which the liquid is distributed can be limited so that an invalid liquid film is not formed.
[0009]
FIG. 5 shows a configuration diagram of another example of the liquid distributor of the present invention, where (a) is a front view, (b) is a plan view, (c) is a side view, (d) is a developed view, and (e) ) Is a perspective view.
In the liquid distributor of the present invention, the opening end of the distributor can be closed with a closing plate as required. In FIG. 5, the closing plate 13 and the liquid distributor 3 are integrally formed.
FIG. 6 shows an explanatory diagram of another example of mounting the liquid distributor of the present invention on a plate.
FIG. 6 shows an example in which a plurality of liquid distributors 3 are attached to the plate 2 obliquely and used as a distributor. In FIG. 6, a groove is cut obliquely in the plate 2, and a plurality of distributors 3 are attached along this. By mounting in this way, the heat transfer efficiency can be improved by shaking the fluid on the liquid film side to the left and right.
[0010]
FIG. 7 shows an explanatory diagram when the liquid distributor of the present invention is used as a liquid recovery device, where (a) is a front view, (b) is a plan view, and (c) is a side view.
In this case, the large slits 5 and 5 ′ are provided only at positions where the liquid is dropped. When two sets of fluids are subjected to heat exchange at the same time, the liquid can be distributed to different positions by changing the dropping position.
Moreover, it is also possible to discharge | emit a liquid to one side by attaching the distributor which does not provide a slit as needed diagonally.
[0011]
【The invention's effect】
According to the present invention, in a liquid film type plate heat exchanger, an inexpensive liquid distributor capable of uniformly distributing the fluid on the liquid film side between the plates can be used.
In addition, this liquid distributor has a spring property and is bent plate processed so that it can be fixed by itself between the plates, and the liquid distribution can be easily adjusted depending on the size and number of slits. As a result, separate liquids can be passed without heat exchange.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an example of a liquid film plate heat exchanger according to the present invention, (a) a front view and (b) a cross-sectional view taken along line AA of (a).
2A and 2B are configuration diagrams showing an example of a liquid distributor according to the present invention, wherein FIG. 2A is a front view, FIG. 2B is a plan view, and FIG. 2C is a side view.
FIG. 3 is a cross-sectional explanatory diagram when the liquid distributor of the present invention is used.
FIG. 4 is a configuration diagram showing another example of the liquid distributor of the present invention, (a) a front view, (b) a plan view, and (c) a side view.
FIG. 5 is a configuration diagram showing another example of the liquid distributor of the present invention, in which (a) a front view, (b) a plan view, (c) a side view, (d) a developed view, and (e) a perspective view.
FIG. 6 is an explanatory view of another example in which the liquid distributor of the present invention is mounted on a plate.
FIGS. 7A and 7B are explanatory views in which the liquid distributor of the present invention is used as a liquid recovery device, in which FIG. 7A is a front view, FIG. 7B is a plan view, and FIG.
[Explanation of symbols]
1: liquid film plate heat exchanger, 2: plate, 3: liquid distributor, 4: edge, 5: 5 ′: slit, 6, 6 ′: first fluid communication pipe, 7, 7 ′: first One fluid introduction path, 8, 8 ′: Second fluid communication pipe, 9, 9 ′: Second fluid introduction pipe, 10: Supply branch, 11: Groove (concave part), 12: Gap, 13: Closing plate

Claims (4)

内側の密閉された空間を第１流体の通路とし、外面に沿って第２流体を流下させて、第１流体と第２流体の間で熱交換させるプレートを、伝熱面同士が互いに向い合うように、所定の隙間を隔てて複数配置した液膜式プレート熱交換器において、前記プレートの外面に、長方形でばね性を有する板状体を、ほぼ中央で曲げて側断面形状を逆Ｕ字又はＶ字型とし、その両端部にほぼ水平の縁部を設け、該縁部に液体が流下するスリットを設けた液分布器を配備したことを特徴とする液膜式プレート熱交換器。The heat-transfer surfaces face each other in a plate that uses the inner sealed space as the first fluid passage and allows the second fluid to flow down along the outer surface to exchange heat between the first fluid and the second fluid. In this way, in the liquid film type plate heat exchanger arranged with a predetermined gap, a rectangular plate-like body is bent on the outer surface of the plate, and the side cross-sectional shape is inverted to be U-shaped. Alternatively, a liquid film plate heat exchanger characterized in that a liquid distributor having a V shape, provided with substantially horizontal edges at both ends thereof, and provided with slits through which liquid flows down at the edges is provided. 前記プレートの外面には、液分布器が配備される凹部が形成されていることを特徴とする請求項１記載の液膜式プレート熱交換器。The liquid film plate heat exchanger according to claim 1, wherein a concave portion in which a liquid distributor is disposed is formed on an outer surface of the plate. 前記液分布器は、プレート外面に複数個配備され、最下部を液回収器としたことを特徴とする請求項１又は２記載の液膜式プレート熱交換器。3. The liquid film plate heat exchanger according to claim 1, wherein a plurality of the liquid distributors are arranged on an outer surface of the plate, and a lowermost part is a liquid recovery unit. 長方形でばね性を有する板状体を、ほぼ中央で曲げて側断面形状をＵ字又はＶ字型とし、その両端部にほぼ直角の縁部を設け、該縁部にスリットを設けたことを特徴とする液膜式プレート熱交換器に用いる液分布器。A rectangular plate-like body having a spring property is bent substantially at the center to have a U-shaped or V-shaped side cross-section, provided with substantially right-angled edges at both ends thereof, and slits at the edges. A liquid distributor used in the liquid film plate heat exchanger.
JP18543499A 1999-06-30 1999-06-30 Liquid membrane plate heat exchanger and liquid distributor used therefor Expired - Fee Related JP3815921B2 (en)

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CN100365372C (en) * 2005-11-16 2008-01-30 杭州钦宝制冷设备有限公司 Three-way guidance tape typed heat exchanger
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