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JP3110197U - Refrigerant tube of heat exchanger - Google Patents

Refrigerant tube of heat exchanger Download PDF

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Publication number
JP3110197U
JP3110197U JP2004006819U JP2004006819U JP3110197U JP 3110197 U JP3110197 U JP 3110197U JP 2004006819 U JP2004006819 U JP 2004006819U JP 2004006819 U JP2004006819 U JP 2004006819U JP 3110197 U JP3110197 U JP 3110197U
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refrigerant
heat exchanger
refrigerant pipe
fin
pipe
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サイ ケー オー
ドン ヨン チャン
セ ヨーン オー
ウーク ヨン リー
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エルジー電子株式会社
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    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

【課題】 熱交換器のコスト低減及び小型化と空気側の圧力損失減少のような細径管の長所を有すると共に、熱伝達効率を向上させて熱交換性能を極大化させることが可能な冷媒管を提供すること。
【解決手段】 多数の冷却フィンが結合され、冷媒と空気とを熱交換させる熱交換器の冷媒管において、前記冷媒管５１は５．３ｍｍ以下の外径を有し、内周面に多数のフィン５３が螺旋状に突設されている。
【選択図】 図１PROBLEM TO BE SOLVED: To provide a refrigerant capable of maximizing heat exchange performance by improving heat transfer efficiency while having advantages of a small diameter tube such as cost reduction and downsizing of a heat exchanger and reduction of air side pressure loss. Providing tubes.
In a refrigerant tube of a heat exchanger in which a large number of cooling fins are coupled to exchange heat between the refrigerant and air, the refrigerant tube 51 has an outer diameter of 5.3 mm or less, and a large number of inner surfaces are arranged on the inner peripheral surface. The fin 53 is provided in a spiral shape.
[Selection] Figure 1

Description

本考案は熱交換器の冷媒管に係り、特に管の内周面に多数のフィンが螺旋状に突出し、冷媒が流れながら熱交換される空気調和器用熱交換器の冷媒管に関する。   The present invention relates to a refrigerant pipe of a heat exchanger, and more particularly, to a refrigerant pipe of a heat exchanger for an air conditioner in which a large number of fins protrude spirally on the inner peripheral surface of the pipe and heat is exchanged while the refrigerant flows.

一般的な空気調和器用熱交換器は、図３に示すように、内部に冷媒が流れる冷媒管１１と、前記冷媒管１１が貫いた状態に取り付けられた多数の冷却フィン３とからなり、前記冷媒管１１を流れる冷媒と冷媒管１１の周囲の空気とが熱交換されるように構成されている。   As shown in FIG. 3, a general heat exchanger for an air conditioner includes a refrigerant pipe 11 through which a refrigerant flows, and a plurality of cooling fins 3 attached in a state in which the refrigerant pipe 11 penetrates, The refrigerant flowing through the refrigerant pipe 11 and the air around the refrigerant pipe 11 are configured to exchange heat.

従来の熱交換器に用いられる冷媒管１１は、図４及び図５に示すように、７ｍｍまたは９ｍｍの外径を有し、その内周面に多数のフィン１３が突出し、前記フィン１３同士の間にグルーブがそれぞれ設けられ、前記フィン１３とグルーブ１５によって冷媒管１１内部の熱伝達面積が増大し、温度境界層が撹乱され、冷媒管１１を流れる冷媒と冷媒管１１の周囲の空気との熱交換を促進させる。   As shown in FIGS. 4 and 5, the refrigerant pipe 11 used in the conventional heat exchanger has an outer diameter of 7 mm or 9 mm, and a large number of fins 13 project on the inner peripheral surface thereof. Grooves are respectively provided between the fins 13 and the grooves 15, the heat transfer area inside the refrigerant pipe 11 is increased, the temperature boundary layer is disturbed, and the refrigerant flowing through the refrigerant pipe 11 and the air around the refrigerant pipe 11 are Promotes heat exchange.

即ち、前記フィン１３とグルーブ１５によって液状または蒸気状の冷媒と接触する冷媒管１１の面積が増大し、低流速の冷媒においても毛細管効果と剪断力によって管内に形成された液膜の乱流の強度も増加して熱交換効果が増大するが、前記フィン１３の個数及び形状によって、冷媒と管壁面との接触面積、液膜の乱流化度及び液膜の膜厚などが可変される。   That is, the fin 13 and the groove 15 increase the area of the refrigerant tube 11 in contact with the liquid or vapor refrigerant, and even in a low flow rate refrigerant, the turbulent flow of the liquid film formed in the tube due to the capillary effect and the shearing force. Although the strength increases and the heat exchange effect increases, the contact area between the refrigerant and the pipe wall surface, the degree of turbulence of the liquid film, the film thickness of the liquid film, and the like are varied depending on the number and shape of the fins 13.

従って、前記冷媒管１１を製造する際には、前記フィン１３がそれぞれの用途に合わせて最適化されるようにフィンの個数、フィンの高さ、フィンの突出角、フィンのねじれ角などの加工変数を選定しなければならない。前記フィンの形状を設計する方式には定型化されたものが未だ存在していないので、実験によって最適の組合を見出す方式で行われている実情である。   Accordingly, when manufacturing the refrigerant tube 11, the number of fins, fin height, fin protrusion angle, fin twist angle, etc. are processed so that the fin 13 is optimized for each application. Variables must be selected. There is no standardized method for designing the shape of the fins, so this is the actual situation in which an optimum combination is found through experiments.

つまり、前記フィンは各加工変数を変更しながら行う実験によって冷媒量や冷媒の種類、外部環境などの熱交換器の使用条件から最適の組合を見出す方式で設計されている。このような方式で設計された従来の熱交換器に用いられる冷媒管１１は、７ｍｍまたは９ｍｍの外径と０．２７ｍｍの管厚ｔ１を有するように形成されたもので、その内周面に突出しているフィン１３は６０個からなり、０．１５ｍｍの高さＨ１、５６°の突出角β１、１８°のねじれ角α１を有する。   In other words, the fins are designed in such a way as to find the optimum combination from the heat exchanger usage conditions such as the amount of refrigerant, the type of refrigerant and the external environment through experiments conducted while changing each processing variable. The refrigerant pipe 11 used in the conventional heat exchanger designed in such a manner is formed to have an outer diameter of 7 mm or 9 mm and a pipe thickness t1 of 0.27 mm, and has an inner peripheral surface thereof. The number of projecting fins 13 is 60, and has a height H1 of 0.15 mm, a projecting angle β1 of 56 °, and a twist angle α1 of 18 °.

ところで、最近、熱交換器の製造コストと空気側の圧力損失を低減させるために、前記冷媒管１１の外径を縮小して製造する必要性が台頭している。しかし、前記冷媒管１１の外径を縮小しながら、従来の冷媒管１１に形成していたフィン１３の形状をそのまま適用すると、むしろ前記冷媒の圧力損失が増加して熱交換効率が低減するだけでなく、フィン１３が加工可能な寸法を外れてしまい冷媒管１１の製造が難しくなるという問題がある。   By the way, recently, in order to reduce the manufacturing cost of the heat exchanger and the pressure loss on the air side, it is necessary to reduce the outer diameter of the refrigerant pipe 11 and manufacture it. However, if the shape of the fin 13 formed in the conventional refrigerant pipe 11 is applied as it is while reducing the outer diameter of the refrigerant pipe 11, the pressure loss of the refrigerant is increased and the heat exchange efficiency is reduced. In addition, there is a problem that it is difficult to manufacture the refrigerant pipe 11 because the fins 13 are out of the processable dimensions.

また、上述した従来の熱交換器に用いられる冷媒管１１は、冷媒を代替冷媒に変更する場合を考慮せずに設計したものなので、前記冷媒を変更すれば、冷媒の圧力損失及び熱伝達係数が変化され、性能を十分発揮できなくなるという問題がある。従って、前記冷媒管の外径を縮小させながら、前記冷媒管に設けられたフィンの形状及び個数を最適化することにより、冷媒の圧力損失を低減させると共に熱伝達係数のような熱伝達性能を向上させることができる冷媒管の開発が求められる。   In addition, the refrigerant pipe 11 used in the above-described conventional heat exchanger is designed without considering the case where the refrigerant is changed to an alternative refrigerant. Therefore, if the refrigerant is changed, the pressure loss and the heat transfer coefficient of the refrigerant are changed. Is changed, and there is a problem that the performance cannot be fully exhibited. Therefore, by optimizing the shape and number of fins provided in the refrigerant pipe while reducing the outer diameter of the refrigerant pipe, the pressure loss of the refrigerant is reduced and the heat transfer performance such as the heat transfer coefficient is improved. Development of refrigerant pipes that can be improved is required.

本考案はかかる問題点を解決するためのもので、その目的は冷媒管の外径を縮小させながら、冷媒管の内周面に突出しているフィンを縮小された外径の冷媒管に最も適するように形成することにより、熱交換器のコスト低減及び小型化と空気側の圧力損失減少のような細径管の長所を有すると共に、熱伝達効率を向上させて熱交換性能を極大化させることが可能な冷媒管を提供することにある。   The present invention is intended to solve such problems, and its purpose is most suitable for a refrigerant pipe having a reduced outer diameter with fins protruding from the inner peripheral surface of the refrigerant pipe reduced in the outer diameter of the refrigerant pipe. In this way, it has the advantages of small diameter tubes such as cost reduction and downsizing of heat exchangers and reduced pressure loss on the air side, and also improves heat transfer efficiency and maximizes heat exchange performance. An object of the present invention is to provide a refrigerant pipe capable of achieving the above.

請求項１に記載の本考案は、多数の冷却フィンが結合され、内周面に多数のフィンが螺旋状に突出され、内部に流れる冷媒と周辺の空気とを熱交換させる熱交換器の冷媒管において、前記冷媒管は５．３mm以下の外径と０．１６ｍｍ〜０．２ｍｍの管厚を有し、前記冷媒管の内部面に突出したフィンの個数は４０〜５０個、フィンの高さは０．１５〜０．１８mm、フィンの突出角は３８〜４２°、フィンのねじれ角は６〜２０°であるようにした熱交換器の冷媒管を要旨とする。   The present invention according to claim 1 is a heat exchanger refrigerant in which a large number of cooling fins are coupled, a large number of fins are spirally projected on the inner peripheral surface, and heat is exchanged between the refrigerant flowing inside and the surrounding air. In the pipe, the refrigerant pipe has an outer diameter of 5.3 mm or less and a pipe thickness of 0.16 mm to 0.2 mm, and the number of fins protruding from the inner surface of the refrigerant pipe is 40 to 50, The gist is a refrigerant tube of a heat exchanger having a thickness of 0.15 to 0.18 mm, a fin protrusion angle of 38 to 42 °, and a fin twist angle of 6 to 20 °.

本考案による熱交換器の冷媒管は、冷媒管の外径が縮小され、縮小された外径の冷媒管に適するようにフィンが形成され、熱交換器の製造コストの低減及び小型化と空気側の圧力損失減少のような細径管の長所を全て生かしながら、前記冷媒管による熱伝達効率を向上させて熱交換の性能を極大化させる利点がある。特に、本考案による冷媒管は、細径管に適した形態でフィンが設計され、前記フィンによる冷媒側圧力損失が最小化されると共に、冷媒管製造時の公差管理が容易であるという利点がある。   The refrigerant pipe of the heat exchanger according to the present invention has a reduced outer diameter of the refrigerant pipe, and fins are formed so as to be suitable for the reduced outer diameter refrigerant pipe. This has the advantage of maximizing the heat exchange performance by improving the heat transfer efficiency of the refrigerant tube while making full use of the advantages of the small-diameter tube such as reducing the pressure loss on the side. In particular, the refrigerant pipe according to the present invention has an advantage that the fin is designed in a form suitable for a small-diameter pipe, refrigerant side pressure loss due to the fin is minimized, and tolerance management at the time of manufacturing the refrigerant pipe is easy. is there.

以下、本考案の実施例を添付図に基づいて説明する。図１は本考案に係る熱交換器の冷媒管構造を示す一部切欠図、図２は本考案に係る冷媒管を拡大して示す一部断面図である。図１及び図２に示すように、本考案による熱交換器の冷媒管では、多数の冷却フィン（図示せず）を貫いた状態に取り付けられた冷媒管において、前記冷媒管５１は５．３ｍｍ以下の外径を有し、内周面に多数のフィン５３が突出しており、前記フィン５３同士の間にグルーブ５５がそれぞれ形成されている。   Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partially cutaway view showing a refrigerant tube structure of a heat exchanger according to the present invention. FIG. 2 is an enlarged partial sectional view showing a refrigerant tube according to the present invention. As shown in FIGS. 1 and 2, in the refrigerant pipe of the heat exchanger according to the present invention, the refrigerant pipe 51 is 5.3 mm in the refrigerant pipe attached in a state of penetrating a plurality of cooling fins (not shown). The fins 53 have the following outer diameters, a large number of fins 53 project from the inner peripheral surface, and grooves 55 are formed between the fins 53.

ここで、前記冷媒管５１は０．１６〜０．２ｍｍの管厚ｔを有するように形成され、前記フィン５３は冷媒管５１の内周面に４０〜５０個突設されると共に、ねじれ角（α）６〜２０°、高さ（Ｈ）０．１５〜０．１８ｍｍ、突出角（β）３８〜４２°を有する。前記フィンのねじれ角αは６〜１０°もしくは１６〜２０°とすることが好ましい。   Here, the refrigerant pipe 51 is formed to have a pipe thickness t of 0.16 to 0.2 mm, and 40 to 50 fins 53 project from the inner peripheral surface of the refrigerant pipe 51 and have a twist angle. (Α) 6 to 20 °, height (H) 0.15 to 0.18 mm, and protrusion angle (β) 38 to 42 °. The twist angle α of the fin is preferably 6 to 10 ° or 16 to 20 °.

このような本考案による冷媒管を用いた熱交換器では、冷媒管５１の外径が５．３ｍｍに縮小されて７ｍｍまたは９ｍｍの管径を有する冷媒管を使用した熱交換器に比べて、同一冷媒流量における冷媒側圧力損失が増加し且つ管厚ｔが減少するので、このような冷媒側圧力損失及び管厚ｔの減少を考慮し、縮小された外径の冷媒管に適するようにフィン５３が設計された。その結果、実験により、前記冷媒管５１の冷媒側圧力損失が減少して熱交換性能が向上し、冷媒管５１製造時のフィンの公差管理が可能となることが分った。   In such a heat exchanger using the refrigerant pipe according to the present invention, the outer diameter of the refrigerant pipe 51 is reduced to 5.3 mm, compared with a heat exchanger using a refrigerant pipe having a pipe diameter of 7 mm or 9 mm, Since the refrigerant-side pressure loss at the same refrigerant flow rate increases and the tube thickness t decreases, the fins are suitable for the reduced-diameter refrigerant tube in consideration of the refrigerant-side pressure loss and the decrease in the tube thickness t. 53 was designed. As a result, it has been found from experiments that the refrigerant-side pressure loss of the refrigerant pipe 51 is reduced, heat exchange performance is improved, and fin tolerance management is possible when the refrigerant pipe 51 is manufactured.

また、前記冷媒管５１の構造を同一にした状態で冷媒を代替冷媒に変更しても、その圧力損失及び熱伝達係数が変化するので、代替冷媒の使用も考慮して前記フィン５３の形状が設計された。   In addition, even if the refrigerant is changed to an alternative refrigerant with the refrigerant pipe 51 having the same structure, the pressure loss and the heat transfer coefficient change. Designed.

本考案の実施形態による熱交換器の冷媒管構造を示す一部切欠図である。It is a partially cutaway view showing a refrigerant tube structure of a heat exchanger according to an embodiment of the present invention. 本考案の実施形態による熱交換器の冷媒管を拡大して示す一部断面図である。It is a partial sectional view expanding and showing a refrigerant pipe of a heat exchanger by an embodiment of the present invention. 一般的な熱交換器を示す斜視図である。It is a perspective view which shows a general heat exchanger. 従来の技術による熱交換器の冷媒管構造を示す一部切欠図である。It is a partial notch figure which shows the refrigerant | coolant tube structure of the heat exchanger by a prior art. 従来の技術による熱交換器の冷媒管を拡大して示す一部断面図である。It is a partial cross section figure which expands and shows the refrigerant pipe of the heat exchanger by the prior art.

符号の説明Explanation of symbols

５１ 冷媒管
５３ フィン
５５ グルーブ
ｔ 冷媒管の管厚
Ｈ フィンの高さ
α フィンのねじれ角
β フィンの突出角51 Refrigerant tube 53 Fin 55 Groove t Refrigerant tube thickness H Fin height α Fin twist angle β Fin protrusion angle

Claims (3)

多数の冷却フィンが結合され、内周面に多数のフィンが螺旋状に突出され、内部に流れる冷媒と周辺の空気とを熱交換させる熱交換器の冷媒管において、
前記冷媒管は５．３mm以下の外径と０．１６ｍｍ〜０．２ｍｍの管厚を有し、前記冷媒管の内部面に突出したフィンの個数は４０〜５０個、フィンの高さは０．１５〜０．１８mm、フィンの突出角は３８〜４２°、フィンのねじれ角は６〜２０°であることを特徴とする熱交換器の冷媒管。In the refrigerant tube of the heat exchanger, in which a large number of cooling fins are coupled, and a large number of fins are spirally projected on the inner peripheral surface to exchange heat between the refrigerant flowing inside and the surrounding air.
The refrigerant pipe has an outer diameter of 5.3 mm or less and a pipe thickness of 0.16 mm to 0.2 mm, the number of fins protruding from the inner surface of the refrigerant pipe is 40 to 50, and the height of the fin is 0. A refrigerant tube for a heat exchanger, wherein the fin projection angle is 38 to 42 °, and the twist angle of the fin is 6 to 20 °. 前記フィンのねじれ角は６〜１０°であることを特徴とする請求項１記載の熱交換器の冷媒管。   The refrigerant pipe of the heat exchanger according to claim 1, wherein the twist angle of the fin is 6 to 10 °. 前記フィンのねじれ角は１６〜２０°であることを特徴とする請求項１記載の熱交換器の冷媒管。   The refrigerant pipe of the heat exchanger according to claim 1, wherein the twist angle of the fin is 16 to 20 °.
JP2004006819U 2000-07-06 2004-11-22 Refrigerant tube of heat exchanger Expired - Lifetime JP3110197U (en)

Applications Claiming Priority (1)

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KR10-2000-0038501A KR100382341B1 (en) 2000-07-06 2000-07-06 Heat exchanger

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JP (2) JP2002062077A (en)
KR (1) KR100382341B1 (en)
CN (1) CN1188652C (en)
ES (1) ES2228189A1 (en)
IT (1) ITRM20010384A1 (en)
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CN1332356A (en) 2002-01-23
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ITRM20010384A1 (en) 2002-01-07
CN1188652C (en) 2005-02-09
US20020011332A1 (en) 2002-01-31
ITRM20010384A0 (en) 2001-07-03
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TW526322B (en) 2003-04-01
KR100382341B1 (en) 2003-05-01

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