CN1193722A - Heat transfer tube and method of manufacturing same - Google Patents

Heat transfer tube and method of manufacturing same Download PDF

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Publication number
CN1193722A
CN1193722A CN98104188A CN98104188A CN1193722A CN 1193722 A CN1193722 A CN 1193722A CN 98104188 A CN98104188 A CN 98104188A CN 98104188 A CN98104188 A CN 98104188A CN 1193722 A CN1193722 A CN 1193722A
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China
Prior art keywords
fin
pipe
notch
circle
tube
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Granted
Application number
CN98104188A
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Chinese (zh)
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CN100347512C (en
Inventor
N·S·古普特
S·J·斯潘塞
D·P·加芬尼
刘新
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Carrier Corp
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Carrier Corp
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Priority claimed from US08/814,471 external-priority patent/US5933953A/en
Application filed by Carrier Corp filed Critical Carrier Corp
Publication of CN1193722A publication Critical patent/CN1193722A/en
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Publication of CN100347512C publication Critical patent/CN100347512C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
    • F28F13/187—Heat-exchange surfaces provided with microstructures or with porous coatings especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
    • 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
    • F28F1/34—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 obliquely
    • F28F1/36—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 obliquely the means being helically wound fins or wire spirals
    • 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
    • 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
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Metal Extraction Processes (AREA)

Abstract

A heat transfer tube and a manufacturing method are provided. The outer surface of the tube is constructed to be capable of improving the heat transmission property under the occasions of evaporating and condensing refrigerant and is applicable to a flooding evaporator, a membrane dropping evaporator or the combination of the flooding evaporator and the membrane dropping evaporator of a casing-tube air conditioning condenser. The tube is equipped with at least one fin cycle which spirally extends around the outer surface. A notch pattern passes through the fin cycle around the tube in an oblique angle with certain interval to extend. A fin body with a hacking port is arranged between every pair of adjacent notches. The fin cycle, the notches and the fin body with the hacking port are formed through rolling the tube wall among a core bar and a fin making disk group, a notch groove wheel and a hacking port wheel. The fin making disk group, the notch groove wheel and the hacking port wheel are successively arranged.

Description

Heat-transfer pipe and manufacture method thereof
The present invention relates generally to heat-transfer pipe.More particularly, the present invention relates to a kind of heat-transfer pipe and manufacture method thereof that all is applicable to air-conditioning and refrigeration system under evaporation and the condensation occasion that be configured in of its cold-producing medium surface.
Shell and tube exchanger contains many pipes at a housing.A kind of fluid that these pipes normally are set to carry out in two kinds of fluids of heat exchange provides many parallel flow channels.In a kind of fooded evaporator, pipe is immersed in the second kind of fluid that flows through heat exchanger shell.Many air-conditioning systems contain shell and tube exchanger.Under the air conditioning occasion, the fluid that is generally water flows through pipe, and cold-producing medium flows through heat exchanger shell.Under a kind of evaporimeter occasion, the cold-producing medium utilization comes cooling fluid from fluid by the conduction heat that tube wall transmitted.This conduction heat makes the cold-producing medium evaporation that contacts with outer tube surface.Under a kind of condenser occasion, the cold-producing medium utilization is delivered to the cooling of conduction heat and the condensation of fluid by tube wall.The heat-transfer capability of this heat exchanger depends on the heat-transfer character of each pipe to a great extent.The external structure of each pipe is very important for the foundation of its total heat-transfer character.
The method of heat transfer efficiency that is used to improve heat-transfer pipe that some known per se are arranged at present.Having a kind of in them is the heat transfer area that increases pipe.One of the prevailing method that is used for increasing the heat transfer area of Tube Sheet of Heat Exchanger is that fin is set on outer tube surface.Fin can be made separately and be connected on the outer surface of pipe, perhaps, can process tube wall by some technology and form fin on outer tube surface.
Under a kind of condensation of refrigerant occasion, except heat transfer area increased, the pipe that also has a reason to make to be shaped on fin had higher condensation heat transfer performance than the pipe of smooth outer surface.Condensed refrigerant forms the continuous liquid refrigerant film of one deck on the outer surface of smooth pipe.The existence of this film can reduce the coefficient of overall heat transmission through tube wall.Increase with film thickness increases this film to the obstruction of heat transmission.Because surface tension effects, the thickness of the film on the fin is less than the thickness of the film on the tube-surface major part usually, thereby can reduce the heat transmission of fin is hindered.
Under a kind of cold-producing medium evaporation occasion, the heat transfer area that increases tube-surface also can improve the heat transfer property of heat-transfer pipe.In addition, can promote with the contacted tube surface of boiling liquid on the surface structure that nuclear boiling is arranged can improve performance.In the nuclear boiling process is arranged, make the liquid evaporation that contacts with this surface from being heated the heat that transmits on the surface, steam forms bubble.From the steam in this surperficial heat superheated bubble, it is big that the size of bubble becomes.When the size of bubble was enough big, surface tension was overcome, the bubble disengagement tube-surface.Leave the surface with bubble, liquid enters the space that bubble is vacateed, and the steam that residues in this space has just had a liquid make-up source, thereby can evaporate and form another bubble.Form bubble, bubble disengagement surface continuously from the teeth outwards and surperficial become wet again and steam bubbles rises and the convection action of agitated liquid, can improve the coefficient of overall heat transmission of heating surface.
Heating surface is constructed with and can holds back the nucleating point that the position is provided and promotes steam bubbles formation for steam, can strengthen that the nuclear evaporation process is arranged.For example, cutter hair heating surface may be provided in epipole simply, makes the heat-transfer character on surface be better than similar smooth surface.Cavity type nucleating point can produce stable bubble post and surface of good heat-transfer character.Cavity type nucleating point is the surperficial depression of a kind of depression opening less than depression volume under the surface.But surrounding liquid flows into spill-over cavity type nucleating point too much, makes it inoperative.By heating surface being constructed with the surperficial lower channel of relatively large connection, and they to lead to the opening on surface less relatively, can reduce or prevent that steam from holding back or the spill-over of nucleating point, improve the heat transfer property on surface.
In a kind of downward film evaporator, liquid film on heating surface spread with the development of film be very important for improving heat-transfer capability.
Viewpoint from logistics and manufacture view, need a kind of external heat transfer surfaces spread unchecked with the condensation of refrigerant of downward film evaporator and evaporation occasion under all have good heat transfer capacity heat-transfer pipe, thereby in condenser and fooded evaporator, can all use with a kind of tube configurations.
The present invention is the manufacture method of a kind of heat-transfer pipe and a kind of heat-transfer pipe, and the outer surface of this heat-transfer pipe is configured to improve simultaneously in condensation of refrigerant, spreads unchecked the heat transfer property under evaporation and the film evaporation occasion.
This pipe is formed with one or the multi-turn fin on its outer surface.Notch oblique angle at certain intervals passes the fin circle and extends around the periphery of pipe.Fin circle part between the adjacent notch in this fin circle forms a fin.The tip of fin is split into two tip portions.Each tip portion is from outside most advanced and sophisticated extension of fin of splitting mouthful towards the adjacent fins circle of immediate fin base portion.
Compare with traditional finned tube, notch and the tip of riving can further increase the exterior surface area of pipe.Be extended with the fin tip of riving above the groove between the adjacent fins circle, formation can promote the cavity of the cold-producing medium pool boiling in the fooded evaporator.
Under a kind of condensation and falling film evaporation occasion, relatively sharper tip can promote cold-producing medium to discharge and spread from fin.In most of devices, the pipe in the shell-tube type air-condition heat exchanger is flatly or near flatly extending.For the pipe of level, notch and the structure of splitting mouthful fin can promote condensed refrigerant to enter the groove between the fin on tube-surface top from fin, also can promote the cold-producing medium that is condensed to discharge from the bottom of tube-surface.In film evaporation pattern, sharp keen tip and notch and lower cold-producing medium surface tension help liquid to spread on tube-surface and along tubular axis.This can make horizontal shell-tube type falling film evaporator have good wettable.
Utilization makes tube wall form the system fin machine of fin on the outer surface at pipe in rolling between inner core bar and the outside system fin dish, in its set of tools, increase one or more cutting dish and one or more splits a mouthful dish, just can make things convenient for and finish the trough of belt mouth economically and split mouthful manufacturing of most advanced and sophisticated finned tube.Cutting mouth tool configuration becomes to apply one on the fin of circle to be reversed, so that rived in the tip of this fin.
Accompanying drawing constitutes the part of this specification.In all these accompanying drawings, identical label is represented identical parts.
Fig. 1 represents pipe of the present invention.
Fig. 2 represents how pipe of the present invention is made.
Fig. 3 is the vertical view of a part of outer surface of pipe of the present invention.
Fig. 4 is the vertical view of the part in the individual pen fin of pipe of the present invention.
Fig. 5 is the class cutaway view of two adjacent fin circles of pipe of the present invention.
Fig. 1 shows heat-transfer pipe 10.Pipe 10 comprises tube wall 11, pipe internal surface 12 and tube outer surface 13.What extend out from the outer surface of tube wall 11 is fin 22.Pipe 10 has the outer diameter D of measuring from tube outer surface 13 o, it does not comprise the height (H of fin 22 f).
Pipe of the present invention can be made by a technique for rolling at an easy rate.Fig. 2 shows a kind of like this technology.In Fig. 2, system fin machine 60 is being processed the pipe of being made by the ductile metal such as copper 10, thereby produces interior ribs and outside fin on pipe.System fin machine 60 has one or more tool spindle, and every tool spindle contains a set of tools 62, and this set of tools is made fin dishes 63, cutting dish 66 by some and split a mouthful dish 67 and form.Extending in the pipe is core bar axle 65, and core bar 64 is housed above.
Tube wall 11 is pressed between core bar 64 and the system fin machine 63 with the rotation of pipe 10.Under pressure, the metal flow enters in the groove of making between the fin dish, forms rib or fin on the outer surface of pipe.Along with rotation, pipe 10 feeding between core bar 64 and set of tools 62 (in Fig. 2 from left to right), thereby on pipe, form the fin circle of some spirals.The number of turns is system fin dish 63 quantity in the set of tools 62 and the function of making tool spindle 61 quantity used on the fin machine 60.On same route, after forming the fin circle on the pipe 10, cutting wheel 66 is suppressed the notch at oblique angle on the metal of fin circle in set of tools 62.After the notch at oblique angle forms, split mouthful dish 67 fin and be split into two parts each fin circle.
Core bar 64 can be constructed by a kind of like this mode, and as shown in Figure 2, it applies the pattern of some type on the inner surface 12 through the tube wall above it.Typical pattern is the rib circle of one or more spiral.This pattern can improve the fluid that flows through pipe and the coefficient of overall heat transmission between the tube wall.
Fig. 3 shows a part of outer surface of pipe with the form of vertical view.What extend out from the outer surface 13 of pipe 10 is some fin circles 20.Pass each fin circle and what extend with a determining deviation oblique angle is groove 30 patterns.Between a pair of adjacent notch in formed fin circle is a fin 22, and it has two tips 23.
Fig. 4 is the vertical view of the part in the single fin circle of pipe of the present invention.Notch base portion 31 is with respect to the pipe longitudinal axis A TThe inclination angle be α.The tip 23 of fin 22 is with respect to the pipe longitudinal axis A TThe inclination angle be β.(see figure 2) in the manufacture process of pipe, interaction between swivel feeding pipe 10 and the cutting dish 66 can make the axis of fin 22 slightly leave the tooth of cutting wheel and the angle between the fin circle, tip axis line angle β is tilted, i.e. β ≠ α with respect to angle α.But under special circumstances, β=α also is possible.Just because of this rotation of fin, just allow to split mouthful dish 67 fin of riving reliably because carve fin provided for the surface ratio of splitting mouthful fin circle wideer of cutting not.
Have been found that if the angle of cutting wheel greater than 40 °, and the cutting wheel goes up interval between the adjacent tooth less than 0.0125 inch, then fin will twist.The reversing of fin can make splitting of fin mouthful can more effectively carry out.More particularly, if do not reverse, the thickness at fin tip is with the too little so that fin of can't riving reliably.By reversing, splitting mouthful shape of preceding fin after the cutting is parallelogram substantially.After splitting mouth, this parallelogram is rived along its diagonal, forms two triangles.
Fig. 5 is the pseudo-cutaway view of two adjacent fin circles of pipe of the present invention.Use term " puppet " to be because the cutaway view that intercepts along fin circle any part seems all unlikely cutaway view shown in Figure 5 that resembles.Yet this accompanying drawing can be used for illustrating many characteristics of pipe.Fin circle 20A and 20B stretch out from tube wall 11.Fin circle 20A and 20B have proximal part 21 and fin part 22.What extend through fin circle 20A is a notch base portion 32.The height overall of fin circle 20A and 20B is H fThe width of proximal part 21 is W r, the width of size the widest part of fin part 22 is W tThe outer end of fin 22 has two tips 23.Notch is carved into the fin circle and arrives inner wall surface 13 top H nThe place.
Should be understood that, that in manufacture process cutting wheel 66 (Fig. 2) cut notch from the fin circle, but by material is shifted out the cutting district notch are pressed into the fin circle.Move into the zone between the adjacent notch simultaneously and outwards move from the excess stock of the cutting of fin circle part, and move towards the tube wall 11 of fin circle sidepiece from the sidepiece of fin circle.Therefore, W tGreater than W rDistance between the identical point on the adjacent fins circle or title fin pitch are P fBicker split in angle between two tips on the fin part 22 or title is δ.Extend towards the adjacent fin circle of this side from the tip that the sidepiece of a fin circle extends out, leave gap g between two tips.
When pipe is used for a kind of condensation occasion following time, the pointed tip of a greater number can promote the condensation on the tube surface relatively.Because therefore the most advanced and sophisticated volume that covers between the adjacent fins circle forms a kind of cavity, so also just formed and to have promoted the tube-surface that evaporates.
We test the pipe according to two groups of main types of the use cold-producing medium R-134a of technology manufacturing of the present invention.The relevant parameter of the pipe of these two kinds of main types is:
Main type group A-
Nominal outside diameter (D o)-1.9 centimetre (3/4 inch),
Fin pitch (P f)-0.6 millimeter (0.024 inch) or 16.5 every centimetre fin (per inch 42
Individual fin),
Fin height (H f)-.0.79 millimeter (0.031 inch),
Notch base portion height (H n)-0.58 millimeter (0.023 inch),
Notch angle (α)-50 degree, 30 degree, 45 degree,
Split bicker (δ)-70 degree, 90 degree, 110 degree,
Notch density, or the notch quantity-80,140 in each pipe fin circle Monday.
Main type group B-
Nominal outside diameter (D o)-1.9 centimetre (3/4 inch),
Fin pitch (P f)-0.45 millimeter (0.018 inch) or 22 every centimetre fin (per inch 56
Individual fin),
Fin height (H f)-0.58 millimeter (0.024 inch),
Notch base portion height (H n)-0.35 millimeter (0.014 inch),
Notch angle (α)-50 degree,
Split bicker (δ)-90 degree,
Notch density, or the notch quantity-140 in each pipe fin circle Monday.
We compare the performance of the pipe of the performance of the pipe of these two kinds of main types and a kind of smooth outer surface in the scope of heat flux conditions.Under a kind of evaporation occasion, the performance of main type group A on average is about 2.5 times of performance of smooth pipe, and the performance of main type group B is about 3 times of performance of smooth pipe.Under a kind of condensation occasion, the performance of main type group A on average is about 19 times of performance of smooth pipe, and the performance of main type group B is about 23 times of performance of smooth pipe.
Going out from the test data deducibility, is that 12.5 millimeters (1/2 inches) can obtain similar performance in the pipe of 25 millimeters (1 inches) at nominal outside diameter, wherein:
A) the fin pitch is 0.038 to 0.76 millimeter (0.015 to 0.030 inch), or
0.038mm≤P f(0.015 inch≤P of≤0.76mm f≤ 0.030 inch);
B) ratio of fin height and external diameter of pipe is between 0.026 to 0.067, or
0.026≤H f/D o≤0.067；
C) notch density is 60 to 190;
D) angle between notch axis and the pipe longitudinal axis is spent between 65 degree 20, or
20°≤α≤65°；
E) height of notch base portion be fin height 0.50 to 0.8 between, or
0.50≤H n/H f≤0.8；
F) angle between two tips on fin is spent between 130 degree 70, or
70°≤δ≤130°。
The main type pipe of being tested has three circles or " head ".When determining the optimal number of fin circle or head, to be far more than the consideration of quantity to the heat transfer property influence to the consideration of easily manufactured degree.Number is many more, and the expense that the fin cast is formed on the tube-surface is also high more.

Claims (8)

1. method that on the outer wall of pipe, forms heating surface, it comprises following operation:
With the rolling between an inner core bar and one group system fin dish of described tube wall, to form the fin circle;
Around the circumference cutting on described fin circle at certain intervals of described pipe, in described fin circle, to form fin; And
The described fin of riving is to form two tips on each fin.
2. the method for claim 1 is characterized in that,
The notch that is formed by described cutting operation has a notch base shaft line angle,
Described tip has a tip axis line angle;
Described cutting operation comprises reverses described tip, makes described tip axis line angle favour described notch base shaft line angle.
3. method as claimed in claim 2 is characterized in that, described cutting operation mobile material and form described tip, and the material of described displacement forms the width W of described fin in its end r
4. the heating surface of making by the described method of claim 1.
5. an improved heat-transfer pipe (10), it has an outer surface, wherein improves to comprise:
At least one centers on described outer surface and the fin circle (20) of spiral setting;
The circumference that centers on described pipe radially extends into the notch (30) of described fin circle at certain intervals, and each notch has a longitudinal axis (A with respect to described pipe T) become the base portion axis at an angle (α);
Described notch is divided into mouthful fin of splitting that a proximal part (21) and has two tips (23) with described fin circle,
The described mouthful fin of splitting between a pair of adjacent described notch, its Breadth Maximum (W t) greater than the Breadth Maximum (W of described proximal part r).
6. pipe as claimed in claim 5 is characterized in that,
Fin pitch (P f) be between 0.38 to 0.76 millimeter (0.015 to 0.030 inch);
Described pipe has an external diameter (D o), described fin circle has a fin height (H f), the ratio (H of described height and described external diameter f/ D o) between 0.026 to 0.067;
The quantity of the described notch in the fin circle in each pipe week is between 60 to 190;
Angle between described notch axis and the described pipe longitudinal axis is between 30 to 65 degree;
Described notch has a base portion (32), its notch base portion height (H n) be described fin height 0.50 to 0.80 between;
Described tip is split bicker (δ) with one and is extended outwardly away from each other; And
Described fin tip axis line angle (β) is between 20 to 65 degree.
7. heat-transfer pipe as claimed in claim 6 is characterized in that, described split bicker (δ) 70 to 130 the degree between.
8. heat-transfer pipe as claimed in claim 6 is characterized in that,
Described fin pitch is 0.42 to 0.60 millimeter,
Described notch angle is 50 degree,
Notch quantity in the fin circle in each pipe week is 110 to 140, and
Described notch base portion height is 0.50 to 0.80 of a described fin height.
CNB981041884A 1997-03-17 1998-03-16 Heat transfer tube and method of manufacturing same Expired - Fee Related CN100347512C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US82047297A 1997-03-17 1997-03-17
US08/820472 1997-03-17
US08/814471 1997-03-17
US08/820,472 1997-03-17
US08/814,471 1997-03-17
US08/814,471 US5933953A (en) 1997-03-17 1997-03-17 Method of manufacturing a heat transfer tube

Publications (2)

Publication Number Publication Date
CN1193722A true CN1193722A (en) 1998-09-23
CN100347512C CN100347512C (en) 2007-11-07

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EP (1) EP0865838B1 (en)
JP (1) JP2945649B2 (en)
KR (1) KR100324065B1 (en)
CN (1) CN100347512C (en)
AU (1) AU722999B2 (en)
CA (1) CA2230213C (en)
ES (1) ES2174408T3 (en)

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US20060112535A1 (en) 2004-05-13 2006-06-01 Petur Thors Retractable finning tool and method of using
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CN108431538A (en) * 2015-12-23 2018-08-21 布莱姆巴那和洛利有限公司 Shell-and-tube heat exchanger, the finned tube for this heat exchanger and corresponding method
CN106391914A (en) * 2016-11-10 2017-02-15 华南理工大学 Rolling and ploughing-extrusion device and method for manufacturing three-dimensional internal and external finned tubes
CN106391914B (en) * 2016-11-10 2018-07-20 华南理工大学 Three-dimensional internal and external finned tubes manufacturing equipment and method are cut-squeezed to a kind of roll with plough
CN107774849A (en) * 2017-10-27 2018-03-09 华南理工大学 A kind of forming tool and manufacturing process of evaporative condenser two-purpose ladder palace lattice finned tube
CN111788021A (en) * 2017-11-28 2020-10-16 利勃海尔比伯拉赫零部件有限公司 Rope reel and method for manufacturing the same
CN111788021B (en) * 2017-11-28 2024-01-16 利勃海尔比伯拉赫零部件有限公司 Rope reel and method for manufacturing same
CN108168353A (en) * 2017-12-28 2018-06-15 无锡市欣明换热新材料科技有限公司 The condenser pipe and its processing unit (plant) of a kind of condenser

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CA2230213C (en) 2003-05-06
AU5842698A (en) 1998-09-17
JP2945649B2 (en) 1999-09-06
AU722999B2 (en) 2000-08-17
CN100347512C (en) 2007-11-07
CA2230213A1 (en) 1998-09-17
KR19980080288A (en) 1998-11-25
KR100324065B1 (en) 2002-08-08
EP0865838B1 (en) 2002-05-08
EP0865838A1 (en) 1998-09-23
ES2174408T3 (en) 2002-11-01
JPH10263734A (en) 1998-10-06

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