JPS6146898A - Heat exchanger with fins - Google Patents
Heat exchanger with finsInfo
- Publication number
- JPS6146898A JPS6146898A JP16834584A JP16834584A JPS6146898A JP S6146898 A JPS6146898 A JP S6146898A JP 16834584 A JP16834584 A JP 16834584A JP 16834584 A JP16834584 A JP 16834584A JP S6146898 A JPS6146898 A JP S6146898A
- Authority
- JP
- Japan
- Prior art keywords
- frost
- fins
- fin
- heat exchanger
- plate
- 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
Links
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
- 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
- F28F1/12—Tubular 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
- F28F1/24—Tubular 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
- F28F1/32—Tubular 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、空気調和機の室外機の熱交換器に利用するも
ので、ヒートポンプ運転時の着霜防止を目的としている
。。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used in a heat exchanger for an outdoor unit of an air conditioner, and is aimed at preventing frost formation during heat pump operation. .
従来例の構成とその問題点
従来のフィン付熱交換器は、第5図に示すように並列す
る多数のプレートフィン1と、このプレートフィンに直
交する多数の伝熱管2から構成されている。3はエンド
プレートである。そして伝熱管内を流通する熱源流体と
矢印の向きに流れる空気とがこのフィン付熱交換器を介
して熱交換を行っている。Structure of a conventional example and its problems A conventional finned heat exchanger is composed of a large number of parallel plate fins 1 and a large number of heat exchanger tubes 2 orthogonal to the plate fins, as shown in FIG. 3 is an end plate. The heat source fluid flowing in the heat transfer tube and the air flowing in the direction of the arrow exchange heat via this finned heat exchanger.
このような従来のフィン付熱交換器を空気調和機の室外
機の熱交換器に使用し、ヒートポンプとして運転すると
、第6図(第5図を矢印入方向から見た図)に見られる
ように、プレートフィン1の気流に対する上流側端部4
より霜5がプレートフィン1に着霜する。そして、運転
時間が経過するにつれ、第6図に示すように霜5が発達
して、プレートフィン間6を閉塞する。When such a conventional heat exchanger with fins is used as a heat exchanger for an outdoor unit of an air conditioner and operated as a heat pump, as shown in Figure 6 (view of Figure 5 from the direction of the arrow). , the upstream end 4 of the plate fin 1 with respect to the airflow
As a result, the frost 5 forms on the plate fins 1. Then, as the operating time elapses, frost 5 develops as shown in FIG. 6 and blocks the space between the plate fins 6.
第6図において2は伝熱管であり、矢印は気流の向きを
示す。第7図は第6図を矢印Bから見た図であり、プレ
ートフィン1の上流側端部4に着霜する霜の発達具合を
詳細に示したものである。In FIG. 6, 2 is a heat exchanger tube, and the arrow indicates the direction of air flow. FIG. 7 is a view of FIG. 6 viewed from the arrow B, and shows in detail the development of frost forming on the upstream end portion 4 of the plate fin 1.
伝熱管2の気流に対する上流側に位置するフィン部7で
は、伝熱管2からの距離が短いため、プレートフィン表
面温度が伝熱管温度に近い為プレートフィンと空気との
温度差が大きくなり、その結果フィン表面の局所熱交換
量が大きくなって霜5の発達が早く霜の厚みも大きい。In the fin section 7 located on the upstream side of the heat exchanger tube 2 with respect to the air flow, the distance from the heat exchanger tube 2 is short, so the plate fin surface temperature is close to the heat exchanger tube temperature, so the temperature difference between the plate fin and the air becomes large. As a result, the amount of local heat exchange on the fin surface becomes large, and the frost 5 develops quickly and becomes thick.
一方体熱管2と伝熱管20間に位置するフィン部8では
、伝熱管2からの距離が遠くなり、従ってプレートフィ
ン表向温度が伝熱管温度よりも高くなってプレートフィ
ン1と空気との温度差が小さくなる結果、フィン表面で
の局所熱交換量が小さく霜があまり発達せず、霜の厚み
も小さい。このように従来のフィン付熱交換器では、プ
レートフィンに付着する霜の厚みが一様でなく、局所的
に霜の厚みが大きい部分と小さい部分とに分れていた。On the other hand, in the fin portion 8 located between the body heat tube 2 and the heat exchanger tube 20, the distance from the heat exchanger tube 2 is long, and therefore the plate fin surface temperature becomes higher than the heat exchanger tube temperature, and the temperature between the plate fin 1 and the air increases. As a result of the smaller difference, the amount of local heat exchange on the fin surface is small, frost does not develop much, and the thickness of the frost is also small. As described above, in the conventional heat exchanger with fins, the thickness of the frost adhering to the plate fins is not uniform, and the frost is locally divided into areas where the thickness is large and areas where the thickness is small.
そして霜の厚みが大きい部公程、プレートフィン間が霜
で目詰りしやすいため、早い時間でフィン間が霜で閉塞
されていた。In areas where the frost is thicker, the spaces between the plate fins tend to become clogged with frost, so the spaces between the fins become clogged with frost quickly.
フィン間が霜で閉塞されると、伝熱管内を流れる熱源流
体と空気との熱交換が出来なくなるので、ヒートポンプ
として継続的に運転する為には、定期的にプレートフィ
ンに付着した霜を融解する必要がある。従来のフィン付
熱交換器であるとL記説明した様に、フィン間の霜の目
詰りが早いという欠点を有する為、1時間に1回程霜を
融解しないと、ヒートポンプの運転ができず、エネルギ
ー効率の面で良くなかった。If the space between the fins becomes clogged with frost, heat exchange between the heat source fluid flowing inside the heat transfer tube and the air becomes impossible, so in order to operate the heat pump continuously, it is necessary to periodically melt the frost that has adhered to the plate fins. There is a need to. As explained in Section L, conventional heat exchangers with fins have the disadvantage that the frost between the fins gets clogged quickly, so the heat pump cannot operate unless the frost is melted about once every hour. It was not good in terms of energy efficiency.
発明の目的
本発明は、上記従来の欠点を解消する為に、プレートフ
ィン上に着霜する霜の厚さを一様にして、プレートフィ
ン間の閉塞時間を従来より長時間としだ着霜防止のフィ
ン付熱交換器を提供するものである。Purpose of the Invention In order to eliminate the above-mentioned conventional drawbacks, the present invention makes the thickness of the frost that forms on the plate fins uniform and prevents frost formation by making the closing time between the plate fins longer than before. The present invention provides a heat exchanger with fins.
発明の構成
この目的を達成するために本発明は、プレートフィンの
気流に対する上流側端部に凸凹状切欠き部を設け、さら
にこの凸凹状切欠き部の凹部を、伝熱管と対向するよう
位置させたものである。Structure of the Invention In order to achieve this object, the present invention provides a convex-concave notch at the upstream end of the plate fin relative to the airflow, and further positions the concave part of the concave-concave notch so as to face the heat exchanger tube. This is what I did.
この構成により、伝熱管近辺の熱交換量が減少し、着霜
量が減少するものである。With this configuration, the amount of heat exchange near the heat exchanger tubes is reduced, and the amount of frost formation is reduced.
実施例の説明
以下、本発明の一実施例について第1図と第2図を参考
に説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
図において、1は並列する多数のプレートフィン、2は
このプレートフィンに直交する多数の伝熱管、3はエン
ドプレートである。そしてプレートフィン1には、第2
図に示すように、上流側端部4に、凸凹状切り欠き部9
か設けてあり、しかも、伝熱管2の気流に対する上流側
に位置するフィン部7に前記凸凹状切り欠き部9の凹部
10が配置されている。In the figure, 1 is a large number of parallel plate fins, 2 is a large number of heat exchanger tubes orthogonal to the plate fins, and 3 is an end plate. And the plate fin 1 has a second
As shown in the figure, a concave-convex notch 9 is provided at the upstream end 4.
Furthermore, the concave portion 10 of the uneven notch portion 9 is arranged in the fin portion 7 located on the upstream side of the heat exchanger tube 2 with respect to the air flow.
上記構成による熱交換器の作用を第3図にて説明する。The operation of the heat exchanger with the above configuration will be explained with reference to FIG.
上記構成からなるフィン付熱交換器を空気調和機の室外
機に使用してヒートポンプ運転すると、フィン部7が四
部10となっているためこの部分でのフィン面積が従来
に比較して減少し、その結果フィン部7での局所熱交換
量が減り、霜の着霜量も減少する。When a heat exchanger with fins having the above configuration is used in an outdoor unit of an air conditioner to operate a heat pump, the fin area in this part is reduced compared to the conventional one because the fin part 7 is divided into four parts 10. As a result, the amount of local heat exchange in the fin portion 7 is reduced, and the amount of frost formed is also reduced.
従ってフィン部7ての霜の発達は防止される結果、第3
図に示す様に、プレートフィン1上に霜5は一様の厚さ
て着霜する。その結果プレートフィン間6が霜で閉塞さ
れる時間が長くなり、ヒートポンプ運転時間が長くなっ
て、霜を融解する回数が減ってエネルギー効率の面でも
飛躍的に向上する。Therefore, the development of frost on the fin portion 7 is prevented, and as a result, the third
As shown in the figure, frost 5 forms on the plate fin 1 with a uniform thickness. As a result, the time during which the space between the plate fins 6 is blocked by frost becomes longer, the heat pump operating time becomes longer, the number of times the frost is melted is reduced, and energy efficiency is also dramatically improved.
他の実施例としては、第4図に示す様な波形状の凸凹状
切り欠き部11を有するフィン付熱交換器でも第2図に
示す実施例と同様の効果を有するのは言うまでもない。As another embodiment, it goes without saying that a heat exchanger with fins having a corrugated concave-convex notch 11 as shown in FIG. 4 has the same effect as the embodiment shown in FIG. 2.
発明の詳細
な説明で明らかな様に本発明は、並列する多数のプレー
トフィンと、このプレートフィンに直交する多数の伝熱
管を備え、前記プレートフィンの気流に対する上流側端
部に凸凹状の切り欠き部を設け、さらに前記伝熱管の気
流に対する上流側に位置するフィン部に前記凸凹状切り
欠き部の凹部を配置したもので、このようなフィン付熱
交換器を、空気調和機の室外機に使用してヒートポンプ
運転すると、伝熱管の上流部フィン部が凹部となってフ
ィン面積が減少している結果、この部分での局所の熱交
換量が減少し、霜の着霜も減る。As is clear from the detailed description of the invention, the present invention includes a large number of parallel plate fins and a large number of heat transfer tubes perpendicular to the plate fins, and has an uneven cut at the upstream end of the plate fin with respect to the airflow. A notch is provided, and the concave part of the uneven notch is arranged in the fin part located upstream of the heat exchanger tube with respect to the air flow, and such a heat exchanger with fins is used as an outdoor unit of an air conditioner. When operated as a heat pump, the upstream fin portion of the heat transfer tube becomes a concave portion and the fin area is reduced, resulting in a decrease in the amount of local heat exchange in this portion and a reduction in frost formation.
その結果、前記フィン部での霜の発達が防止されプレー
トフィン上に霜が一様な厚さで着霜する。As a result, the development of frost on the fin portions is prevented, and frost forms on the plate fins with a uniform thickness.
従ってプレートフィン間が霜で閉塞される時間が長くな
って、ヒートポンプ運転時間が長くなり、霜を融解する
回数が減り、エネルギー効率の面でも飛躍的に向上する
。Therefore, the time during which the space between the plate fins is blocked by frost becomes longer, the heat pump operating time becomes longer, the number of times frost is melted is reduced, and energy efficiency is also dramatically improved.
第1図は本発明の一実施例によるフィン付熱交換器の斜
視図、第2図は同熱交換器の要部断面図、第3図は同熱
交換器におけるフィンへの着霜状態を示す断面図、第4
図は本発明の他の実施例を示す第2図相当図、第5図は
従来のフィン付熱交換器の斜視図、第6図は従来のフィ
ン付熱交換器の着霜状態を示す断面図、第7図は従来の
フィン付熱交換器の異なる角度から見た着霜状態を示す
断面図である。
1・・・・・・プレートフィン、2・・・・・・伝熱管
、9・11・・・・・・凸凹状切り欠き部。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図
第2(2)
筆 3 図
第4図
第5図Fig. 1 is a perspective view of a heat exchanger with fins according to an embodiment of the present invention, Fig. 2 is a sectional view of the main part of the heat exchanger, and Fig. 3 shows the state of frost on the fins of the heat exchanger. Sectional view shown, No. 4
The figure is a diagram equivalent to Figure 2 showing another embodiment of the present invention, Figure 5 is a perspective view of a conventional finned heat exchanger, and Figure 6 is a cross section showing the frosting state of a conventional finned heat exchanger. 7 are cross-sectional views showing the frosting state of a conventional finned heat exchanger viewed from different angles. 1... Plate fin, 2... Heat exchanger tube, 9/11... Concave and convex cutout portion. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 (2) Brush 3 Figure 4 Figure 5
Claims (1)
に直交する多数の伝熱管を備え、前記プレートフィンの
気流に対する上流側端部に凸凹状切り欠き部を設け、さ
らに前記伝熱管の気流に対する上流側に位置するフィン
部に前記凸凹状切り欠き部の凹部を配置したフィン付熱
交換器。A large number of parallel plate fins and a large number of heat transfer tubes perpendicular to the plate fins are provided, an uneven cutout is provided at the upstream end of the plate fin with respect to the air flow, and a concave and convex cutout is provided on the upstream side of the heat transfer tube with respect to the air flow. A heat exchanger with fins, in which a concave portion of the uneven cutout portion is arranged in a fin portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16834584A JPS6146898A (en) | 1984-08-10 | 1984-08-10 | Heat exchanger with fins |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16834584A JPS6146898A (en) | 1984-08-10 | 1984-08-10 | Heat exchanger with fins |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6146898A true JPS6146898A (en) | 1986-03-07 |
Family
ID=15866333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16834584A Pending JPS6146898A (en) | 1984-08-10 | 1984-08-10 | Heat exchanger with fins |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6146898A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008002760A (en) * | 2006-06-23 | 2008-01-10 | Sharp Corp | Refrigerator |
US7578339B2 (en) * | 2003-05-23 | 2009-08-25 | Mitsubishi Denki Kabushiki Kaisha | Heat exchanger of plate fin and tube type |
-
1984
- 1984-08-10 JP JP16834584A patent/JPS6146898A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7578339B2 (en) * | 2003-05-23 | 2009-08-25 | Mitsubishi Denki Kabushiki Kaisha | Heat exchanger of plate fin and tube type |
US8162041B2 (en) | 2003-05-23 | 2012-04-24 | Mitsubishi Denki Kabushiki Kaisha | Heat exchanger of plate fin and tube type |
JP2008002760A (en) * | 2006-06-23 | 2008-01-10 | Sharp Corp | Refrigerator |
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