JPH03282192A - Heat exchanger - Google Patents

Heat exchanger

Info

Publication number
JPH03282192A
JPH03282192A JP8390590A JP8390590A JPH03282192A JP H03282192 A JPH03282192 A JP H03282192A JP 8390590 A JP8390590 A JP 8390590A JP 8390590 A JP8390590 A JP 8390590A JP H03282192 A JPH03282192 A JP H03282192A
Authority
JP
Japan
Prior art keywords
fins
fin
slit
distance
heat exchanger
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
Application number
JP8390590A
Other languages
Japanese (ja)
Inventor
Takao Hoshi
隆夫 星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP8390590A priority Critical patent/JPH03282192A/en
Publication of JPH03282192A publication Critical patent/JPH03282192A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F28F1/325Fins with openings

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Abstract

PURPOSE:To eliminate easy frosting due to narrowed distance between a slit fin and a fin when the slit fin is cut and raised on the fin by a method wherein the distance between the tip end rim of the slit fin, which is positioned on the upstream side of the flowing direction of air, and the fin is designed so as to be substantially equal to or longer than the distance between the fins provided in parallel. CONSTITUTION:Slit fins 4 are fine belt type along the up-and-down direction of fins 2 while the widthwise direction of the slit fin is along the flow direction of heat exchanging air. Notches 5 are formed at the side of one end of widthwise direction, which is positioned at the upstream side of heat exchanging air for the slit fins 4, while a distance H between the tip end rims 4a of the slit fins 4 and the end rims 2a of the fins 2 is designed so as to be substantially equal to or longer than a distance P between the fins 2.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) この発明はたとえば空気調和機などに用いられる熱交換
器に関し、とくにフィンにスリットフィンが切り起こさ
れた熱交換器に関する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a heat exchanger used, for example, in an air conditioner, and more particularly to a heat exchanger in which slit fins are cut into the fins.

(従来の技術) たとえば、ヒートポンプ式の冷凍サイクルを備えた空気
調和機においては、室内側熱交換器あるいは室外側熱交
換器として熱交換器が用いられる。この熱交換器は多数
枚のフィンを所定の間隔で並設し、これらフィンに複数
の熱交換パイプを貫通させて形成されている。
(Prior Art) For example, in an air conditioner equipped with a heat pump type refrigeration cycle, a heat exchanger is used as an indoor heat exchanger or an outdoor heat exchanger. This heat exchanger is formed by arranging a large number of fins in parallel at predetermined intervals and passing a plurality of heat exchange pipes through these fins.

従来、上記構成の熱交換器の性能向上を図るためには、
フィンの間隔を狭めて熱交換面積の増大を図ったり、フ
ィンにスリットフィンを切り起こすことで熱交換パイプ
から熱交換空気への熱伝達率の向上を図るなどのことが
行われていた。
Conventionally, in order to improve the performance of the heat exchanger with the above configuration,
Efforts have been made to increase the heat exchange area by narrowing the spacing between the fins, and by cutting slit fins into the fins to improve the heat transfer coefficient from the heat exchange pipe to the heat exchange air.

(発明が解決しようとする課題) しかしながら、これらの手段は乾き条件や結露条件上で
の性能向上が主である。そのため、熱交換器を蒸発器と
して利用した場合、低温になって蒸発器に@霜するよう
な条件下においては、霜が空気流通方向の先端側より付
着成長するから、フィンの間隔が狭いと、早期に目詰ま
りが発生して送風抵抗が増大し、熱交換器の性能低下を
招く。
(Problems to be Solved by the Invention) However, these means mainly improve performance under dry conditions or dew condensation conditions. Therefore, when a heat exchanger is used as an evaporator, under conditions where the temperature becomes low and frost forms on the evaporator, frost will adhere and grow from the tip side in the air flow direction, so if the fin spacing is narrow, , clogging occurs early, increasing air blowing resistance and causing a decline in heat exchanger performance.

とくに、フィンにスリットフィンを切り起こすことで熱
交換バイブから熱交換空気への熱伝達率の向上を図るよ
うにした場合、スリットフィンの空気流通方向先端とフ
ィンとの間の距離が、丁度、並設されたフィンの間隔の
ほぼ半分となるから、着霜による目詰まり現象が顕著に
なるということがあった。
In particular, when the heat transfer coefficient from the heat exchange vibe to the heat exchange air is improved by cutting and raising slit fins on the fins, the distance between the tips of the slit fins in the air flow direction and the fins is exactly Since the spacing between the fins arranged in parallel is approximately half, the phenomenon of clogging due to frost formation becomes noticeable.

この発明は上記事情にもとずきなされたもので、その目
的とするところは、フィンにスリットフィンを切り起こ
した場合、このスリットフィンとフィンとの間の距離が
狭くなって着霜し易いということがないようにした熱交
換器を提供することにある。
This invention was made based on the above-mentioned circumstances, and its purpose is that when slit fins are cut and raised on the fins, the distance between the slit fins becomes narrow and frost is likely to form. An object of the present invention is to provide a heat exchanger that prevents this from happening.

[発明の構成コ (課題を解決するための手段及び作用)上記課題を解決
するためにこの発明は、多数のフィンを所定間隔で並設
し、これらフィンに熱交換バイブを貫通させるとともに
、上記フィンの一部を幅方向が空気流通方向に沿うよう
切り起こしてスリットフィンを設けた熱交換器において
、上記スリットフィンの空気流通方向の上流側に位置す
る先端縁と、上記フィンとの間の距離を、並設されたフ
ィン間の間隔とほぼ同じあるいはそれ以上に設定したこ
とを特徴とする。
[Structure of the Invention (Means and Effects for Solving the Problems) In order to solve the above problems, the present invention provides a large number of fins arranged in parallel at predetermined intervals, a heat exchange vibrator passing through these fins, and In a heat exchanger in which a slit fin is provided by cutting and raising a part of the fin so that the width direction thereof is along the air flow direction, there is a gap between the tip edge of the slit fin located on the upstream side in the air flow direction and the fin. It is characterized in that the distance is set to be approximately the same as or greater than the spacing between the fins arranged in parallel.

このような構成によれば、スリットフィンの先端縁とフ
ィンとの間の距離がフィン間の間隔よりも小さくなると
いうことがないから、スリットフィンを設けることによ
って着霜し易くなることがない。
According to such a configuration, the distance between the tip edge of the slit fin and the fin does not become smaller than the interval between the fins, so the provision of the slit fin does not cause frost formation to occur easily.

(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 present invention will be described below with reference to the drawings.

第1図乃至第4図はこの発明の第1の実施例を示し、第
4図は熱交換器1の一部を概略的に示す斜視図である。
1 to 4 show a first embodiment of the present invention, and FIG. 4 is a perspective view schematically showing a part of a heat exchanger 1. FIG.

この熱交換器1は所定の間隔で並設された多数のフィン
2を備えている。フィン2はたとえばアルミニュウムな
どの熱伝導率の高い材料によって薄い板状に形成されて
いる。これらフィン2には、板面に対してほぼ直交する
方向に複数の熱交換バイブ3が貫通されている。この熱
交換バイブ3には図示しない送風機によって矢印方向に
流通される熱交換空気と熱交換する冷媒が流れるように
なっている。熱交換器1が蒸発器として用いられる場合
、フィン2間に流れる熱交換空気は上記熱交換バイブ3
に流れる冷媒によって冷却されるようになっている。
This heat exchanger 1 includes a large number of fins 2 arranged in parallel at predetermined intervals. The fins 2 are made of a material with high thermal conductivity, such as aluminum, and are formed into a thin plate shape. A plurality of heat exchange vibes 3 are passed through these fins 2 in a direction substantially perpendicular to the plate surface. A refrigerant flows through the heat exchange vibe 3 to exchange heat with heat exchange air that is circulated in the direction of the arrow by a blower (not shown). When the heat exchanger 1 is used as an evaporator, the heat exchange air flowing between the fins 2 is transferred to the heat exchange vibe 3.
It is designed to be cooled by a refrigerant flowing through.

上記フィン2には、大きさの異なる多数の帯状のスリッ
トフィン4が切り起こされている。このスリットフィン
4は、第1図乃至第3図に示すようにフィン2の上下方
向に沿って細長い帯状をなし、その幅方向を熱交換空気
の流通方向に沿わせている。スリットフィン4の熱交換
空気の上流側に位置する幅方向一端側には切欠部5が形
成され、この切欠部5によってスリットフィン4の先端
縁4aとフィン2との最も近い部分であるスリットフィ
ン4が切り起こされた箇所の端縁2aとの距離が後述す
るように所定寸法以上に設定されている。
A large number of band-shaped slit fins 4 of different sizes are cut and raised in the fin 2. As shown in FIGS. 1 to 3, the slit fins 4 are shaped like elongated strips along the vertical direction of the fins 2, and the width direction of the slit fins 4 is aligned with the flow direction of the heat exchange air. A notch 5 is formed at one end in the width direction of the slit fin 4 located on the upstream side of the heat exchange air. The distance from the edge 2a of the cut-up portion 4 is set to be greater than a predetermined dimension, as will be described later.

上記スリットフィン4の幅方向上流側に位置する先端縁
4aと、フィン2のスリットフィン4が切り起こされた
箇所の端縁2aとの距離Hは以下のように設定される。
The distance H between the tip edge 4a of the slit fin 4 located on the upstream side in the width direction and the edge 2a of the fin 2 where the slit fin 4 is cut and raised is set as follows.

つまり、第1図乃至第3図に示すように切り起こされた
スリットフィン4の高さをh1切欠部5によるスリット
フィン4の切欠幅をWとすると、スリットフィン4の先
端縁4aとフィン2の端縁2aとの間の距離Hは、H−
ハフ下J    ・・・(1)式 で求めることができる。第3図に示すようにフィン2の
間隔をPとした場合、スリットフィン4の高さhは、h
≦P/2の範囲に設定する。そして、上記距離HがH≧
Pとなるようスリットフィン4の高さhとスリットフィ
ン4の切欠幅Wを設定すれば、上記距離Hをフィン2間
の間隔Pとほぼ同じあるいはそれ以上にすることができ
る。つまり、スリットフィン4を切り起こしても、その
先端縁4aとフィン2の端縁2aとの距離Hがフィン2
間の間隔Pよりも小さくなるのを防止できる。
In other words, if the height of the slit fin 4 cut and raised as shown in FIGS. The distance H between the edge 2a and the edge 2a is H-
Huff's lower J can be determined using equation (1). As shown in FIG. 3, when the distance between the fins 2 is P, the height h of the slit fins 4 is h
Set within the range of ≦P/2. Then, the distance H is H≧
By setting the height h of the slit fins 4 and the notch width W of the slit fins 4 so that P, the distance H can be made approximately equal to or greater than the distance P between the fins 2. In other words, even if the slit fin 4 is cut and raised, the distance H between the tip edge 4a and the edge 2a of the fin 2 is
It is possible to prevent the interval from becoming smaller than the interval P between them.

つぎに、上記構成の熱交換器1の動作を説明する。熱交
換器1が蒸発器として作用する場合には、熱交換バイブ
3を流れる冷媒からの熱伝導によってフィン2が冷却さ
れる。一方、図示しない送風機によって熱交換空気が第
2図あるいは第4図に矢印で示す方向に流通され、その
熱交換空気がフィン2と熱交換して冷却される。このと
き、熱交換空気中の水蒸気が逆昇華して上記フィン2お
よびスリットフィン4に霜となって成長してゆく。
Next, the operation of the heat exchanger 1 having the above configuration will be explained. When the heat exchanger 1 acts as an evaporator, the fins 2 are cooled by heat conduction from the refrigerant flowing through the heat exchange vibe 3. On the other hand, heat exchange air is circulated by a blower (not shown) in the direction shown by the arrow in FIG. 2 or FIG. 4, and the heat exchange air is cooled by exchanging heat with the fins 2. At this time, water vapor in the heat exchange air sublimes and grows as frost on the fins 2 and slit fins 4.

フィン2およびスリットフィン4に付着する霜は、熱交
換空気の流れ方向上流側の端縁から成長してゆく。また
、霜はフィン2とスリットフィン4とで同じように成長
する。
Frost adhering to the fins 2 and slit fins 4 grows from the edges on the upstream side in the flow direction of the heat exchange air. Furthermore, frost grows in the same way on the fins 2 and slit fins 4.

ところで、上記スリットフィン4の先端縁4aと、フィ
ン2の端縁2aとの距離Hは、フィン2間の間隔Pとほ
ぼ同じあるいはそれ以上に設定されている。そのため、
フィン2の先端において霜が成長する空間と、スリット
フィン4の先端縁4aにおいて霜が成長する空間とはほ
ぼ同じであるがら、スリットフィン4の先端縁4aの箇
所がフィン2の他の箇所よりも先に目詰まりするという
ことが防止される。つまり、フィン2にスリットフィン
4を形成しても、霜による目詰まりが生じやずいという
ことがない。
Incidentally, the distance H between the tip edge 4a of the slit fin 4 and the edge 2a of the fin 2 is set to be approximately the same as or greater than the distance P between the fins 2. Therefore,
Although the space where frost grows at the tip of the fin 2 and the space where frost grows at the tip edge 4a of the slit fin 4 are almost the same, the tip edge 4a of the slit fin 4 has a larger area than the other areas of the fin 2. This also prevents clogging in advance. In other words, even if the slit fins 4 are formed on the fins 2, there is no risk of clogging due to frost.

第5図乃至第7図はこの発明の他の実施例を示す。この
実施例はフィン2に切り起こされるスリットフィン41
の変形例である。すなわち、スリットフィン41はフィ
ン2の板面に対して斜め後方(熱交換空気の流れ方向下
流側)に切り起こし、それによってスリットフィン41
の先端縁41gとフィン2の端縁2aとの間の距離Hを
上記一実施例と同様フィン2間の間隔Pとほぼ同じある
いはそれ以上に設定するようにしたものである。
5 to 7 show other embodiments of the invention. In this embodiment, a slit fin 41 is cut and raised on the fin 2.
This is a modified example. That is, the slit fins 41 are cut and raised diagonally backward (downstream in the flow direction of the heat exchange air) with respect to the plate surface of the fin 2, so that the slit fins 41
The distance H between the tip edge 41g of the fin 2 and the edge 2a of the fin 2 is set to be approximately the same as or greater than the distance P between the fins 2, as in the above embodiment.

[発明の効果] 以上述べたようにこの発明は、フィンに切り起こされる
スリットフィンの空気流通方向の上流に位置する先端縁
と、上記フィンとの間の距離を、並設されたフィン間の
間隔とほぼ同じあるいはそれ以上に設定するようにした
。そのため、スリットフィンの先端縁とフィンとの間の
距離を、フィン間の間隔と同じあるいはそれ以上に確保
することができる。したがって、熱交換器を蒸発器とし
て利用した場合、熱交換空気の流れ方向上流側から着霜
し始めても、スリットフィンの先端縁の箇所が他の箇所
よりも先に目詰まりするのを防ぐことができる。
[Effects of the Invention] As described above, the present invention allows the distance between the fin and the tip edge of the slit fin cut up in the fin, which is located upstream in the air flow direction, to be adjusted by adjusting the distance between the fins arranged in parallel. I set it to almost the same or more than the interval. Therefore, the distance between the tip edge of the slit fin and the fin can be ensured to be equal to or greater than the spacing between the fins. Therefore, when the heat exchanger is used as an evaporator, even if frost begins to form from the upstream side in the flow direction of the heat exchange air, the tip edges of the slit fins can be prevented from becoming clogged before other parts. I can do it.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例を示すフィンの平面図、第
2図は同じく側面図1、第3図は同じく複数枚のフィン
の配置状態の断面図、第4図は熱交換器の一部の概略的
構成を示す斜視図、第5図はこの発明の他の実施例を示
すフィンの平面図、第6図は同じく側面図、第7図は同
じく複数枚のフィンベスの配置状態の断面図である。 2・・・フィン、3・・・熱交換バイブ、4.41・・
・スリットフィン。
Fig. 1 is a plan view of a fin showing an embodiment of the present invention, Fig. 2 is a side view 1, Fig. 3 is a sectional view of a plurality of fins arranged, and Fig. 4 is a diagram of a heat exchanger. FIG. 5 is a plan view of a fin showing another embodiment of the present invention, FIG. 6 is a side view, and FIG. FIG. 2...Fin, 3...Heat exchange vibe, 4.41...
・Slit fin.

Claims (1)

【特許請求の範囲】[Claims] 多数のフィンを所定間隔で並設し、これらフィンに熱交
換パイプを貫通させるとともに、上記フィンの一部を幅
方向が空気流通方向に沿うよう切り起こしてスリットフ
ィンを設けた熱交換器において、上記スリットフィンの
空気流通方向の上流側に位置する先端縁と、上記フィン
との間の距離を、並設されたフィン間の間隔とほぼ同じ
あるいはそれ以上に設定したことを特徴とする熱交換器
A heat exchanger in which a large number of fins are arranged side by side at predetermined intervals, a heat exchange pipe is passed through the fins, and slit fins are provided by cutting and raising a part of the fins so that the width direction thereof is along the air flow direction, A heat exchanger characterized in that the distance between the tip edge of the slit fin located on the upstream side in the air flow direction and the fin is set to be approximately the same as or greater than the spacing between the fins arranged in parallel. vessel.
JP8390590A 1990-03-30 1990-03-30 Heat exchanger Pending JPH03282192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8390590A JPH03282192A (en) 1990-03-30 1990-03-30 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8390590A JPH03282192A (en) 1990-03-30 1990-03-30 Heat exchanger

Publications (1)

Publication Number Publication Date
JPH03282192A true JPH03282192A (en) 1991-12-12

Family

ID=13815639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8390590A Pending JPH03282192A (en) 1990-03-30 1990-03-30 Heat exchanger

Country Status (1)

Country Link
JP (1) JPH03282192A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015015545A1 (en) * 2013-07-29 2015-02-05 株式会社日立製作所 Heat exchanger and air conditioner
US11448472B2 (en) * 2018-12-28 2022-09-20 Kyungdong Navien Co., Ltd. Heat transfer fin and fin-tube type heat exchanger unit using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015015545A1 (en) * 2013-07-29 2015-02-05 株式会社日立製作所 Heat exchanger and air conditioner
US11448472B2 (en) * 2018-12-28 2022-09-20 Kyungdong Navien Co., Ltd. Heat transfer fin and fin-tube type heat exchanger unit using the same

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