JPS6011096A - Fin type heat exchanger and manufacture thereof - Google Patents

Fin type heat exchanger and manufacture thereof

Info

Publication number
JPS6011096A
JPS6011096A JP12057183A JP12057183A JPS6011096A JP S6011096 A JPS6011096 A JP S6011096A JP 12057183 A JP12057183 A JP 12057183A JP 12057183 A JP12057183 A JP 12057183A JP S6011096 A JPS6011096 A JP S6011096A
Authority
JP
Japan
Prior art keywords
fins
refrigerant pipes
heat exchanger
plate fins
fin
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
JP12057183A
Other languages
Japanese (ja)
Inventor
「湧」水 照良
Teruyoshi Wakumizu
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP12057183A priority Critical patent/JPS6011096A/en
Publication of JPS6011096A publication Critical patent/JPS6011096A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/02Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B21D53/085Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes
    • 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

Abstract

PURPOSE:To improve the heat exchanging rate of the heat exchanger as well as the rigidity of fins and simplify the manufacturing work of the heat exchanger. CONSTITUTION:Fins 21 are inserted into the inside of the U-shaped support member 24 of aluminum through openings 25 as shown by the arrow sign 21 in the diagram. In this case, the fins 21 are inserted and piled alternately one by one so that the protuberances 23, formed on respective fins 21, are abutted against each other at the tip ends 23' thereof, whereby, the intervals between fins are kept in constant substantially. After all of the fins 21 are piled, refrigerant pipes 18, having outer diameters slightly smaller than the diameters of through ports 22, are penetrated through the through ports 22. Next, metallic piping members 18', whose diameter is larger than the inner diameter of the refrigerant pipes 18, are fitted to the refrigerant pipes 18 to engage respective refrigerant pipes 18 with the fns 21. Cool air flowing through the heat exchanger, is disturbed not only by the refrigerant pipes 18 but also by the protuberances 23 and the surface area of the fins 21 is increased by the protuberances 23, therefore, heat exchanging area between the cool air and the fins 21 may be increased.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 本発明は複数のプレートフィンと該プレートフィンを貫
通して配管された冷媒管とを備えたフィン型熱交換器に
関し、特に前記プレートフィンの形状及びフィン型熱交
換器の製造方法に関する。
Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a fin-type heat exchanger equipped with a plurality of plate fins and refrigerant pipes piped through the plate fins. The present invention relates to the shape of the fin-type heat exchanger and a method of manufacturing the fin-type heat exchanger.

(ロ)従来技術 以下、第1図乃至第7図に基づいて説明する。(b) Conventional technology The following will explain based on FIGS. 1 to 7.

(11は冷蔵ショーケース等の低温庫で、断熱壁(2)
により区画形成され前面開口(3)に開閉自在な透ツ」
扉(4)が設けられた庫内(5)は、複数の棚(6)及
び照明用庫内灯(7)が設けられた貯蔵室(8)と冷気
循環用送風機(9)及び熱交換器([が配設された冷気
通路01)とに仕切板(12)により仕切られている。
(11 is a low temperature storage such as a refrigerated showcase, with an insulated wall (2)
The front opening (3) is divided into sections and can be opened and closed freely.
The interior (5) with the door (4) is a storage room (8) equipped with a plurality of shelves (6) and an interior light (7) for illumination, a blower for cold air circulation (9), and a heat exchanger. A partition plate (12) separates the cold air passage 01 from the cold air passage 01 in which the cold air passage 01 is provided.

又、低温庫(1)下部にはユニット室(13)が形成さ
れ、ユニット室(1段には前記熱交換器(10)と共に
冷媒回路を構成する圧縮機α4)及び凝縮器05)等が
配設されている。
Further, a unit room (13) is formed in the lower part of the low-temperature storage (1), and the unit room (compressor α4 and condenser 05, which constitute a refrigerant circuit together with the heat exchanger (10) in the first stage), etc. It is arranged.

以下、従来の熱交換器(IOA)の構造について説明す
る。熱交換器(IOA)は左右に設けられた管板(16
)、06)と、管板06)、06)間に夫々間隔を存し
て設けられた複数のプレートフィン(以下フィンという
)(17)・・・と、これらフィン(1η・・・に形成
された開口(17)・・・を貫通し冷媒が通過して熱交
換が行われる冷媒管αgl・・・とから構成されている
。ここでフィン(17)・・・を所定間隔ごとに並べる
際には、第5図及び第6図に示した如(、夫々のフィン
の周囲が挿入されフィン間隔を保持する溝鱈・−・が形
成された箱治具(20)を用い、前記溝θ訃・・Kフィ
ンαD・・・を挿入して間隔の保持を図っていた。従っ
て、間隔寸法の精度を大幅に向上させることはできない
と共に、箱治具翰を使用しているため異なる寸法のフィ
ンごとに箱治具(201を製作する必要があり、又、複
数のフィン(17)・・・を一枚づつ箱治具@)・−・
の溝(19)・・・へ挿入するため製造作業性は非常に
悪(、熱交換器(IOA)の総合的な製造コストの上昇
を招いていた。
The structure of a conventional heat exchanger (IOA) will be described below. The heat exchanger (IOA) has tube plates (16
), 06), a plurality of plate fins (hereinafter referred to as fins) (17) provided at intervals between the tube plates 06), 06), and these fins (1η...) The fins (17) are arranged at predetermined intervals. In this case, as shown in FIGS. 5 and 6, a box jig (20) having grooves inserted around each fin to maintain the fin spacing is used to fill the grooves. θ... K fin αD... was inserted to maintain the spacing. Therefore, the accuracy of the spacing dimensions cannot be significantly improved, and since a box jig is used, different dimensions may be generated. It is necessary to manufacture a box jig (201) for each fin, and it is necessary to make a box jig (201) for each fin (17).
Because the heat exchanger (IOA) is inserted into the groove (19), the manufacturing workability is very poor (and the overall manufacturing cost of the heat exchanger (IOA) increases).

さらに、熱交換器(10A)は製造コスト削減のために
夫々のフィン0′7)・−・の板厚を極めて薄く形成し
ており、弾力性がなく折れ易く、又、除霜時の箱残り防
止のためフィン(17)・・・間隔を広くとっており、
熱交換面積は制限されると共に、フィン(171−間を
通る冷気の流れは第4図に示したように冷媒管(181
により僅かに乱される外はスムーズに熱交換器(10A
)を通過してしまうため、熱交換効率が小さいという欠
点が発生していた。
Furthermore, in order to reduce manufacturing costs, the heat exchanger (10A) has each fin 0'7) made extremely thin, so it has no elasticity and breaks easily. To prevent residue, fins (17) are spaced widely apart.
The heat exchange area is limited and the flow of cold air between the fins (171-
The heat exchanger (10A
), resulting in a disadvantage of low heat exchange efficiency.

(ハ)発明の目的 本発明は熱交換器の熱交換率、フィンの剛性を向上させ
ると共に、製造作業の簡素化を図ることを目的とする。
(c) Purpose of the Invention The purpose of the present invention is to improve the heat exchange efficiency of a heat exchanger and the rigidity of fins, and to simplify manufacturing operations.

に)発明の構成 本発明は、熱交換器を構成する夫々のフィン適所の両面
に相対向して複数の突出部を形成し、これら突出部の当
接により夫々のフィン間隔を確実に保持さぜ、製造作業
を極めて簡素化すると共に製造コストの低減を図り、さ
らに前記突出部を形成することにより前記フィンの熱交
換面積拡大、突出部による乱流の発生及び突出部同志の
当接による夫々のフィン間の熱伝導性の向上により熱交
換器の熱交換率の向上を図ったものである。
B) Structure of the Invention The present invention forms a plurality of protrusions facing each other on both sides of appropriate positions of each fin constituting a heat exchanger, and the spacing between the fins is reliably maintained by abutment of these protrusions. Furthermore, by forming the protrusions, the heat exchange area of the fins is increased, turbulence is generated by the protrusions, and the protrusions come into contact with each other. The aim is to improve the heat exchange efficiency of the heat exchanger by improving the thermal conductivity between the fins.

(ホ)実施例 以下本発明の一実施例を第7図乃至第12図に基づいて
説明する。尚、力1図乃至第6図と同符号のものは同様
なものとする。(IOB)は本発明に係るフィン型熱交
換器で管板(16)、(I6)間に複数のフィン(2υ
・−・が設けられている。フィン圓・・・の適所には複
数の冷媒管貫通口(22)・・・が表裏を貫通して形成
され、フィン0υの適所には表裏両面に前記貫通口(2
の・・・を避けて例えばプレス加工により複数の突出部
(ハ)・・−が形成されている。夫々の突出部(ハ)・
・・は例えはプレス加工により円すい台形に形成され、
先端には略平面円形の先端部(23+が形成されている
(E) Embodiment An embodiment of the present invention will be described below with reference to FIGS. 7 to 12. Note that the same reference numerals as in Figures 1 to 6 refer to the same elements. (IOB) is a fin-type heat exchanger according to the present invention, which has a plurality of fins (2υ
... is provided. A plurality of refrigerant pipe penetration holes (22) are formed at appropriate locations on the fin round, passing through the front and back sides, and at appropriate locations on the fin 0υ, the through holes (22) are formed on both the front and back surfaces.
A plurality of protrusions (c) are formed by, for example, press working, avoiding the.... Each protrusion (c)・
For example, it is formed into a trapezoidal shape by press processing,
A substantially planar circular tip portion (23+) is formed at the tip.

前記夫々のフィン(21)・・・は隣り合うフィンの突
出部Q;3)・・・ど5しが当接して並べられ、突出部
(23)・・−どぅしの当接によりフィン間隔は一定に
保たれると共に寸法精度の向上を図ることができる。又
、第11図に示したように熱交換器を流れる冷気は冷媒
管a&・・・たけでなく突出部(231−・・により乱
されると共に、突出部(ハ)・・・によりフィンCDの
表面積は増加するため、冷気とフィンCDとの熱交換面
積の増加を図ることができ、又突出部(23)・・・ど
うしの当接によりフィン(2I)・・・間にて熱の伝導
がありフィンH・・・ごとの温度は均一化されるため熱
交換効率の向上を図ることができる。
The respective fins (21) are arranged in such a way that the protrusions Q; The spacing can be kept constant and dimensional accuracy can be improved. In addition, as shown in Fig. 11, the cold air flowing through the heat exchanger is disturbed not only by the refrigerant pipes a&... but also by the protrusions (231-...), and by the protrusions (c)... Since the surface area of the fins CD increases, it is possible to increase the heat exchange area between the cold air and the fins CD, and the contact between the protrusions (23) and the fins (2I) allows heat to be transferred between the fins (2I). Since there is conduction and the temperature of each fin H is made uniform, it is possible to improve the heat exchange efficiency.

以下、本発明に係るフィン型熱交換器の製造方法につい
て説明する。第12図に示したように内側全幅がフィン
(2υの全幅と略等しい例えばアルミ製のコ字状支持部
材(24)の内部に開口(ハ)から矢印(2I)で示し
たようにフィン(21+・・・を入れる。このとき夫々
のフィン(2+)・・・に形成された突出部(ハ)・・
・の先端部(23)どうしが当接するようにフィン(2
1)・・・を交互に一枚づつ入れ重ねていくことにより
フィン間隔な略一定に保ち、フィンシυ・・・を全て重
ねた後に第9図に示した貫通口(22・・・の直径より
外径の僅かに小さい冷媒管08)・・・を夫々の貫通口
(22)・・・に貫通させる。
Hereinafter, a method for manufacturing a fin type heat exchanger according to the present invention will be explained. As shown in Fig. 12, the fin (2υ) whose inner full width is approximately equal to the full width of the fin (2υ) is inserted into the inside of the U-shaped supporting member (24) made of aluminum, for example, from the opening (C) to the fin (2I) as shown by the arrow (2I). 21+... At this time, the protrusion (c) formed on each fin (2+)...
・Insert the fins (2) so that their tips (23) are in contact with each other.
1) By alternately inserting and stacking the fins one by one, the fin spacing is kept approximately constant, and after stacking all the fins υ..., the diameter of the through hole (22...) shown in Figure 9 is A refrigerant pipe 08) having a slightly smaller outer diameter is passed through each of the through holes (22).

次に夫々の冷媒管f18)・・・に冷媒管(181・・
・の内径より直径の大きい例えば金属製の拡管部材(1
81・・・を挿入し、夫々の冷媒tf181・・・とフ
ィン(21)・・・とを係合させる。
Next, connect the refrigerant pipes (181...
・For example, a metal tube expansion member (1
81... are inserted, and the respective refrigerant tf181... and the fins (21)... are engaged with each other.

従って、フィン(21)・・・を重ねる際には従来のよ
うにフィン挿入用の溝が形成された箱治具を使用する必
要はなく、側面あて具(24A)、(24A)と背面あ
て具(24B)とからなる構造が極めて簡単な支持部材
(24)を使用するため、治具式の節約を図ることがで
きる。又、フィン(2])・・・を一枚づつ支持部材(
24+内部に入れ重ねることにより極めて容易に且つ短
時間にフィン間隔の精度の向上した熱交換器を製造する
ことができ、大幅な作業性の向上を図ることができ製造
コストの総合的な削減を図ることができる。尚、フィン
(21)・・・を支持部材(24)の上面開口c!4)
から入れ背面あイ具(24B)側から重ねることにより
上記と同様な作用効果を得ることができる。
Therefore, when stacking the fins (21), there is no need to use a conventional box jig with grooves for inserting the fins, and the side panels (24A), (24A) and the back panel Since the supporting member (24), which is composed of the tool (24B) and has an extremely simple structure, is used, it is possible to save on the number of jigs. In addition, the fins (2)... are supported one by one by the supporting member (
By stacking the heat exchangers inside the 24+, it is possible to manufacture heat exchangers with improved fin spacing accuracy extremely easily and in a short time, greatly improving workability and reducing overall manufacturing costs. can be achieved. Note that the fins (21)... are connected to the upper surface opening c of the supporting member (24)! 4)
The same effect as described above can be obtained by stacking from the back side (24B) side.

(へ)発明の効果 本発明は熱交換器を構成する複数のフィン適所両面に冷
媒管用の貫通口を避は相対向した複数の突出部が形成さ
れ、夫々相対向した突出部どうしが当接してフィン間隔
が保持されたプレートフィンを備えたフィン型熱交換器
であるから、フィン間隔の寸法精度の向上を図ることが
でき、フィン間隔が狭い部分に着霜が起き閉塞が発生す
ることを防止でき、又、熱交換器を流れる冷気は突出部
により乱されると共に、前記突出部により熱交換面積は
増加して熱交換効率の向上を図ることができる。さらに
熱交換器を製造する際には箱治具を使用する必要がなく
、前記プレートフィンを相対向した突出部どうしが当接
するように重ねてい(上を図り製造コストの総合的な削
減を図ることができる。
(F) Effects of the Invention The present invention is characterized in that a plurality of protrusions facing each other are formed on both sides of a plurality of fins constituting a heat exchanger at appropriate locations, avoiding the through holes for refrigerant pipes, and the respective protrusions facing each other are brought into contact with each other. Since this is a fin-type heat exchanger equipped with plate fins that maintain the fin spacing, it is possible to improve the dimensional accuracy of the fin spacing, and prevent frost formation and blockage in areas where the fin spacing is narrow. In addition, the cold air flowing through the heat exchanger is disturbed by the protrusions, and the heat exchange area is increased by the protrusions, thereby improving the heat exchange efficiency. Furthermore, when manufacturing a heat exchanger, there is no need to use a box jig, and the plate fins are stacked so that the opposing protrusions are in contact with each other (by stacking the plate fins on top of each other, it is possible to reduce manufacturing costs overall). be able to.

【図面の簡単な説明】 第1図は低温庫の縦断面図、第2図乃至6図は従来例を
示し、第2図はフィン型熱交換器の斜視図、第3図は第
2図に示した熱交換器の要部拡大図、第4図はフィン間
を流れる冷気の状態図、第5図はプレートフィンの位置
決め方法を示した斜視図、第6図はプレートフィンのセ
ット状態図、第7図乃至第12図は本発明の一実施例を
示し、第7図はフィン型熱交換器の斜視図、第8図はプ
レートフィンの上部斜視図、第9図はプレートフィンの
部分縦断面図、第10図は本発明に係るプレートフィン
を備えた熱交換器の部分前面図、第11図はフィン間を
流れる冷気の状態図、第12図はプレートフィンのセッ
ト状態図である。 (IOB)・・・フィン型熱交換器、 0か・・冷媒管
、(181・・・拡管部材、 Cυ・・・プレートフィ
ン、 (22)・・・冷媒管貫通口、 c!3)・・・
突出部、 (ハ)・・・先端部、 (24)・・支持部
材、(24A)、(24A)・・・側面あて具、(24
B)・・・背向あて具、 (ハ)・・・開口。 第1図 第4図 第6図 第7図 第10121 1111
[Brief explanation of the drawings] Fig. 1 is a vertical cross-sectional view of a low-temperature storage, Figs. 2 to 6 show a conventional example, Fig. 2 is a perspective view of a fin-type heat exchanger, and Fig. 3 is a Figure 4 is a state diagram of the cold air flowing between the fins, Figure 5 is a perspective view showing how to position the plate fins, and Figure 6 is a diagram of the set state of the plate fins. , Fig. 7 to Fig. 12 show an embodiment of the present invention, Fig. 7 is a perspective view of a fin type heat exchanger, Fig. 8 is a top perspective view of a plate fin, and Fig. 9 is a portion of the plate fin. 10 is a partial front view of a heat exchanger equipped with plate fins according to the present invention, FIG. 11 is a state diagram of cold air flowing between the fins, and FIG. 12 is a state diagram of plate fins set. . (IOB)...Fin type heat exchanger, 0...Refrigerant pipe, (181...Pipe expansion member, Cυ...Plate fin, (22)...Refrigerant pipe penetration port, c!3)・・・・
Projection part, (c)... Tip part, (24)... Support member, (24A), (24A)... Side support tool, (24
B)...Dorsal support tool, (C)...Opening. Figure 1 Figure 4 Figure 6 Figure 7 Figure 10121 1111

Claims (1)

【特許請求の範囲】 1゜複数のプレートフィンと該プレートフィンに形成さ
れた複数の貫通口を貫通して配管された冷媒管とを備え
たフィン型熱交換器において、前記夫々のフィン両面適
所に前記貫通口を避は相対向して複数の突出部が形成さ
れ、隣り合った前記プレートフィンの相対向した該突出
部の先端部が当接して前記フィン間隔が保持されたこと
を特徴とするフィン型熱交換器。 2、複数の冷媒管と、適所に前記冷媒管の貫通口を避は
複数の突出部が形成された複数のプレートフィンと、前
記グレートフィンの全幅と内側全幅が略等しく形成され
ると共に少なくとも一側面に開口が形成され、両側面あ
て具と前記側面開口に対向して設けられた背面あて具と
から成る支持部材と、前記冷媒管の内径より直径の犬さ
い拡管部材とな準備し、前記支持部材の開口から該支持
部材内部に前記プレートフィンを入れ、前記背面あて真
鯛から前記側面開口側へ前記プレートフィンを一枚づつ
隣り合った前記プレートフィンの夫々の突出部を当接さ
せ重ね合わせ、夫々の前記プレートフィンに前記冷媒管
を貫通させ、前記冷媒管に前記拡管部材を挿入して夫々
の冷媒管を拡管し夫々の前記プレートフィンと夫々の前
記冷媒管とを係合させてなることを特徴とするフィン型
熱交換器の製造方法。
[Claims] 1. A fin-type heat exchanger comprising a plurality of plate fins and refrigerant pipes piped through a plurality of through holes formed in the plate fins, wherein each of the fins is placed at an appropriate position on both surfaces of the plate fins. A plurality of protrusions are formed facing each other away from the through hole, and the tips of the opposed protrusions of adjacent plate fins abut against each other to maintain the fin spacing. Fin-type heat exchanger. 2. A plurality of refrigerant pipes, a plurality of plate fins formed with a plurality of protrusions formed in appropriate places to avoid the through holes of the refrigerant pipes, and a plurality of plate fins formed such that the overall width of the great fins is approximately equal to the inner full width thereof, and at least one A support member having an opening formed in a side surface and comprising both side side fittings and a back side fitting provided opposite to the side opening, and a pipe expanding member having a diameter larger than the inner diameter of the refrigerant pipe, Insert the plate fins into the support member through the opening of the support member, and move the plate fins one by one from the back facing red sea bream to the side opening side so that the protruding parts of the adjacent plate fins are brought into contact with each other and overlapped. , the refrigerant pipes are passed through each of the plate fins, the tube expansion member is inserted into the refrigerant pipes to expand the respective refrigerant pipes, and each of the plate fins is engaged with each of the refrigerant pipes. A method for manufacturing a fin-type heat exchanger, characterized in that:
JP12057183A 1983-07-01 1983-07-01 Fin type heat exchanger and manufacture thereof Pending JPS6011096A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12057183A JPS6011096A (en) 1983-07-01 1983-07-01 Fin type heat exchanger and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12057183A JPS6011096A (en) 1983-07-01 1983-07-01 Fin type heat exchanger and manufacture thereof

Publications (1)

Publication Number Publication Date
JPS6011096A true JPS6011096A (en) 1985-01-21

Family

ID=14789587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12057183A Pending JPS6011096A (en) 1983-07-01 1983-07-01 Fin type heat exchanger and manufacture thereof

Country Status (1)

Country Link
JP (1) JPS6011096A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02195154A (en) * 1989-01-21 1990-08-01 Takagi Ind Co Ltd Heat exchanger for instantaneous hot water heater
JPH04506180A (en) * 1989-03-23 1992-10-29 ケンナメタル インコーポレイテッド Wear-resistant steel
CN103925828A (en) * 2014-04-03 2014-07-16 东华大学 Radiating fin with spherical protrusions
CN108895876A (en) * 2018-07-24 2018-11-27 豫新汽车热管理科技有限公司 A kind of change caliber pipe plate type heat interchanger core body

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02195154A (en) * 1989-01-21 1990-08-01 Takagi Ind Co Ltd Heat exchanger for instantaneous hot water heater
JPH04506180A (en) * 1989-03-23 1992-10-29 ケンナメタル インコーポレイテッド Wear-resistant steel
CN103925828A (en) * 2014-04-03 2014-07-16 东华大学 Radiating fin with spherical protrusions
CN103925828B (en) * 2014-04-03 2017-01-04 东华大学 A kind of have the radiating fin that ball-type is protruding
CN108895876A (en) * 2018-07-24 2018-11-27 豫新汽车热管理科技有限公司 A kind of change caliber pipe plate type heat interchanger core body

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