JPS59229192A - Heat exchanger - Google Patents

Heat exchanger

Info

Publication number
JPS59229192A
JPS59229192A JP10116484A JP10116484A JPS59229192A JP S59229192 A JPS59229192 A JP S59229192A JP 10116484 A JP10116484 A JP 10116484A JP 10116484 A JP10116484 A JP 10116484A JP S59229192 A JPS59229192 A JP S59229192A
Authority
JP
Japan
Prior art keywords
cooling medium
spiral groove
curvature
angle
tube
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
JP10116484A
Other languages
Japanese (ja)
Inventor
Takeshi Ishizaka
石坂　猛
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Refrigeration Co
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 Matsushita Refrigeration Co filed Critical Matsushita Refrigeration Co
Priority to JP10116484A priority Critical patent/JPS59229192A/en
Publication of JPS59229192A publication Critical patent/JPS59229192A/en
Pending legal-status Critical Current

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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular element
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element

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

PURPOSE:To increase a heating surface area and improve the turbulent flow of cooling medium inside of a tube of cooling medium, by providing a spiral groove over the interior wall of cooling medium tube. CONSTITUTION:A spiral groove 2d of a predetermined depth is formed over the interior wall of a cooling medium tube 2. The bevelled angle of this spiral groove 2d relative to the longitudinal length of cooling medium tube is arranged such that the angle alphab of portion which corresponds to a curvature 2a is sufficiently smaller than the angle alphaa of portion which corresponds to a linear portion 2b in a step of forming the spiral groove 2d, that is, prior to the formation of curvature 2a. By making small the bevelled angle alphab of curvature 2a, it becomes possible to make a portion which is less sharp acting to increase the flow resistance of cooling medium, and thereby allowing for the sufficient relaxation in the flow resistance to the cooling medium at the curvature where it is apt to increase, compared to the linear portion.

Description

【発明の詳細な説明】 本発明は冷凍機、空調機等の蒸発器、凝縮器として使用
される熱交換器に関し、特に熱交換器を構成する冷媒管
の管内壁面に管内伝熱面積の向上あるい（は管内冷媒流
の乱流促進のためにらせん溝を形成したものの改良に係
わる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger used as an evaporator or a condenser in refrigerators, air conditioners, etc., and in particular improves the heat transfer area within the tubes on the inner wall surfaces of refrigerant tubes constituting the heat exchanger. Alternatively, it relates to an improvement in a pipe in which spiral grooves are formed to promote turbulent flow of refrigerant inside the pipe.

通常、上述のらせん溝付冷媒管は伝熱面積の向」二とい
う点では非常に大きな効果を有することがわかっている
が、冷媒の流れに対するその傾斜角度、すなわち管の長
手方向に対する傾斜角度が太きすぎると逆に冷媒流れの
妨害［＆って熱交換効率が悪くなる。従って通常上記傾
斜角度（は７°〜２５°程度のものが多く用いられてい
る。Generally, it is known that the above-mentioned spiral grooved refrigerant tube has a very large effect in terms of the direction of the heat transfer area, but its inclination angle with respect to the refrigerant flow, that is, the inclination angle with respect to the longitudinal direction of the tube. If it is too thick, the refrigerant flow will be obstructed [and the heat exchange efficiency will deteriorate]. Therefore, the above-mentioned inclination angle (about 7° to 25°) is usually used.

一方、このらせん溝付冷媒管を用いてフィンチューブ型
の熱交換器を製造する場合、冷媒管を適宜彎曲して連続
した冷媒通路を形成するものであるが、この彎曲部は冷
媒の流れが円滑でない上、さらにらせん溝による抵抗が
増大し、全体熱交換器として決して効率の良いものが得
られないのが現状であった。On the other hand, when manufacturing a fin-tube heat exchanger using this spiral grooved refrigerant pipe, the refrigerant pipe is appropriately curved to form a continuous refrigerant passage, but this curved part prevents the flow of the refrigerant. In addition to not being smooth, the resistance due to the spiral grooves increases, and the current situation is that it is impossible to obtain an efficient overall heat exchanger.

本発明はこの様な点に鑑み考案されたもので、以下その
一実施例を添付図面に従い説明する。The present invention has been devised in view of these points, and one embodiment thereof will be described below with reference to the accompanying drawings.

第１図は熱交換器本体１の部分断面図を示し。FIG. 1 shows a partial sectional view of a heat exchanger main body 1.

冷媒管２と、この冷媒管２の両側に嵌合されたエツトプ
レー）３．３と、両エンドプレート３，３間に平行に配
列され嵌合された多数の放熱フィン４．４．４・・・・
・・・・・より成る。上記冷媒管２は一側において彎曲
した彎曲部２ａと、上記エツトプレー）３，３、放熱フ
ィン４，４・・・・・・・°・が直交状に嵌合される直
線部２ｂと、反響曲部側において開口するフランジ部２
Ｃ，２０より成り、このフランジ部２０，２Ｃｉ／ｌ：
Ｕベッド６．５を嵌合し、ろう付することで連続した冷
媒通路が形成さてしる。A refrigerant pipe 2, an etching plate 3.3 fitted on both sides of the refrigerant pipe 2, and a large number of radiation fins 4.4.4 arranged in parallel and fitted between both end plates 3, 3.・・・
It consists of... The refrigerant pipe 2 has a curved part 2a which is curved on one side, a straight part 2b in which the etching plates 3, 3, radiation fins 4, 4...°, are fitted orthogonally, and Flange part 2 that opens on the curved part side
C.20, this flange portion 20.2Ci/l:
By fitting and brazing the U-bed 6.5, a continuous refrigerant passage is formed.

一方上記冷媒管２の管内壁面ＴＫ、は第２図、第３図に
示す如く、所定深さのらせん溝２ｄが形成されており、
しかもこのらせん溝２ｄの管長手方向に対する傾斜角度
は第３図に示す如く、らせん溝２ｄの形成段階、すなわ
ち彎曲部２２Ｌの形成前において、直線部２Ｊ７？：相
当する部分の角度αａに対して彎曲部２ａに相当する部
分の角度αｂは十分小さくしである。この様にらせん溝
２ｄの角度を異ならせるためＶＣｔｌ−ｊらぜん溝２ｄ
影形成、所定の溝切り用カッター（図示せず）を管内に
配置して管を所定速度で回転させながら送る場合の彎曲
部２ａに相当する部分だけ回転速度を遅くすることで簡
単に形成される。On the other hand, the inner wall surface TK of the refrigerant pipe 2 is formed with a spiral groove 2d of a predetermined depth, as shown in FIGS. 2 and 3.
Moreover, as shown in FIG. 3, the inclination angle of the helical groove 2d with respect to the longitudinal direction of the pipe is determined by the straight portion 2J7? : The angle αb of the portion corresponding to the curved portion 2a is sufficiently smaller than the angle αa of the corresponding portion. In order to make the angles of the spiral grooves 2d different in this way, VCtl-j spiral grooves 2d
Shadow formation can be easily formed by placing a predetermined groove cutting cutter (not shown) inside the pipe and slowing down the rotation speed only in the portion corresponding to the curved portion 2a when the pipe is fed while rotating at a predetermined speed. Ru.

而して彎曲部２ａにおける傾斜角度αｂが小さいことは
、冷媒が流れる時の流通抵抗の増大する部分が和らげら
れることになる。Therefore, the small inclination angle αb of the curved portion 2a means that the portion where the flow resistance increases when the refrigerant flows is alleviated.

以上の説明からも明らかな如ぐ、本発明の熱交換器によ
れば、冷媒の流れの抵抗が増大しやすい彎曲部において
、その抵抗が直線部に比べて十分和らげることができ、
効率の良いものを得ることができる。As is clear from the above description, according to the heat exchanger of the present invention, in curved portions where resistance to the flow of refrigerant tends to increase, the resistance can be sufficiently softened compared to straight portions.
You can get something more efficient.

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

第１図は本発明一実施例の熱交換器の部分断面図、第２
図は同熱交換器の冷媒管の縦断面図、第３図は同冷媒管
の彎曲前の横断面図を示す。 ２・・・・・冷媒管％２ａ・・・・・彎曲部、２ｂ・・
・・・・直線部、２ｄ・・・・・・らせん溝、４・・・
・・・放熱フィン、αａ。 αｂ・・・・・・傾斜角度。Fig. 1 is a partial sectional view of a heat exchanger according to one embodiment of the present invention;
The figure shows a longitudinal cross-sectional view of the refrigerant pipe of the heat exchanger, and FIG. 3 shows a cross-sectional view of the refrigerant pipe before bending. 2... Refrigerant pipe% 2a... Curved part, 2b...
...Straight section, 2d...Spiral groove, 4...
...radiating fin, αa. αb...Inclination angle.

Claims (1)

【特許請求の範囲】[Claims] 略Ｕ字状に彎曲した彎曲部と直線部より成る冷媒管と、
前記直線部に直交するよう嵌合された多数の放熱フィン
より成り、前記冷媒管の管内壁面に所定深さのらせん溝
を形成するとともに、このらせん溝の管長手方向に対す
る傾斜角度を前記彎曲部において直線部より少なくした
ことを特徴とする熱交換器。A refrigerant pipe consisting of a curved part curved in a substantially U-shape and a straight part;
It consists of a large number of heat dissipation fins fitted perpendicularly to the straight part, and forms a spiral groove of a predetermined depth on the inner wall surface of the refrigerant pipe, and the angle of inclination of the spiral groove with respect to the longitudinal direction of the pipe is set to the curved part. A heat exchanger characterized in that the number of parts is smaller than that of a straight part.
JP10116484A 1984-05-18 1984-05-18 Heat exchanger Pending JPS59229192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10116484A JPS59229192A (en) 1984-05-18 1984-05-18 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10116484A JPS59229192A (en) 1984-05-18 1984-05-18 Heat exchanger

Publications (1)

Publication Number Publication Date
JPS59229192A true JPS59229192A (en) 1984-12-22

Family

ID=14293394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10116484A Pending JPS59229192A (en) 1984-05-18 1984-05-18 Heat exchanger

Country Status (1)

Country Link
JP (1) JPS59229192A (en)

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