EP2791609A1 - Tubes de condenseur avec structure de flanc supplémentaire - Google Patents

Tubes de condenseur avec structure de flanc supplémentaire

Info

Publication number
EP2791609A1
EP2791609A1 EP12791425.7A EP12791425A EP2791609A1 EP 2791609 A1 EP2791609 A1 EP 2791609A1 EP 12791425 A EP12791425 A EP 12791425A EP 2791609 A1 EP2791609 A1 EP 2791609A1
Authority
EP
European Patent Office
Prior art keywords
rib
material projections
tube
projections
axial
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.)
Granted
Application number
EP12791425.7A
Other languages
German (de)
English (en)
Other versions
EP2791609B1 (fr
Inventor
Achim Gotterbarm
Jean El Hajal
Andreas Beutler
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.)
Wieland Werke AG
Original Assignee
Wieland Werke AG
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 Wieland Werke AG filed Critical Wieland Werke AG
Publication of EP2791609A1 publication Critical patent/EP2791609A1/fr
Application granted granted Critical
Publication of EP2791609B1 publication Critical patent/EP2791609B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/068—Shaving, skiving or scarifying for forming lifted portions, e.g. slices or barbs, on the surface of the material
    • 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
    • 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
    • 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
    • F28F1/26—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 being integral with the 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
    • F28F1/12—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
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0061—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for phase-change applications
    • F28D2021/0063—Condensers
    • 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
    • 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
    • F28F2215/00—Fins
    • F28F2215/10—Secondary fins, e.g. projections or recesses on main fins

Definitions

  • the invention relates to a metallic heat exchanger tube, in particular for the liquefaction or condensation of vapors on the tube outside, according to the preamble of each of claims 1, 7 and 9.
  • Heat transfer occurs in many technical processes, for example in refrigeration and air conditioning technology or in chemical and energy engineering.
  • heat exchangers heat is transferred from one medium to another.
  • the media are usually separated by a wall. This wall serves as a heat transfer surface and for separating the media.
  • the temperature of the heat-emitting medium must be higher than the temperature of the heat-absorbing medium. This temperature difference is called the driving temperature difference. The higher the driving temperature difference, the more heat per unit of heat transfer area
  • the structuring of the heat transfer surface can improve heat transfer. This can be achieved that more heat can be transmitted per unit of heat transfer surface than with a smooth surface. Furthermore, it is possible to reduce the driving temperature difference and thus make the process more efficient.
  • heat exchangers are shell and tube heat exchangers.
  • Structured heat exchanger tubes for shell-and-tube heat exchangers usually have at least one structured region and smooth end pieces and possibly smooth intermediate pieces. The smooth end or intermediate pieces
  • Shell and tube heat exchanger may be installed, the outer
  • Diameter of the structured areas should not be greater than the outer one
  • Diameter of the smooth end and intermediate pieces To increase the heat transfer during the condensation on the outside of the tube, various measures are known. Frequently, ribs are applied to the outer surface of the tube. As a result, the surface of the tube is primarily increased and thus the condensation intensified.
  • Nippled tubes in which the ribs have been formed from the wall material of a plain tube by means of a forming process are referred to as integrally rolled ribbed tubes.
  • a rib structure with a rib density of 30 to 45 ribs per inch On the outside of the tube, a rib structure with a rib density of 30 to 45 ribs per inch. This corresponds to a rib pitch of about 0.85 to 0.55 mm.
  • the further increase in performance by increasing the rib density are limited by the Inundations bin occurring in shell and tube heat exchangers limits: With decreasing distance of the ribs is due to the capillary action of the Interspace of the ribs flooded with condensate and the outflow of the
  • rib tip notches are known from US 3,326,283 and US 4,660,630. Furthermore, it is known that increases in performance can be achieved in the case of condenser tubes by introducing additional structural elements in the region of the rib flanks between the ribs while maintaining the rib density. Such structures can be formed by gear-like tools on the rib flanks. The resulting material projections protrude into the space between adjacent ribs. Embodiments of such
  • Rib edge shown extending in the axial and radial directions substantially. These material projections are arranged at the edges of the material projections in the circumferential direction and are formed approximately perpendicular to them. Consequently, each radially extending material projection has a common boundary line with a circumferentially extending material projection. Along this boundary line is the axial
  • Structures collects the condensate due to capillary forces
  • the invention has for its object to produce a comparison with the prior art performance-enhanced heat exchanger tube for the condensation of vapors on the outside of the pipe with the same tube-side heat transfer and pressure drop and the same production costs.
  • the invention is represented by the features of claims 1, 7 and 9.
  • the other dependent claims relate to advantageous embodiments and further developments of the invention.
  • the invention includes a heat exchanger tube with a tube axis, a tube wall and with circumferential on the tube outside ribs.
  • the ribs have a ribbed, rib flanks and a rib tip, wherein the
  • Rippenfuß substantially radially protrudes from the pipe wall.
  • the rib flanks are provided with additional structural elements, the side of the rib
  • Extension of the first material projections along this boundary line is smaller than the axial extent of the second material projections.
  • the present invention therefore relates to structured pipes for
  • the invention is based on the consideration that in condenser tubes performance increases can be achieved by the side of the
  • Rib edges forms additional structural elements in the form of material protrusions.
  • These material protrusions are formed from material of the upper rib flank by lifting and displacing material of the rib similar to a chip by means of a gear-like tool, but not separating it from the rib flank.
  • the material projections remain firmly connected to the rib.
  • the material projections extend in the axial direction of the rib edge in the space between two ribs. By the material projections, the surface of the tube is increased.
  • the edges of the material protrusions facing away from the rib flank represent convex edges on which the condensation process preferably takes place.
  • the teeth of the gear-like tool have in their work area a preferably symmetrical trapezoidal shape.
  • the internal angles at the cutting edge of the teeth are slightly larger than 90 °, preferably between 95 ° and 1 10 °. Due to the trapezoidal shape of the teeth, the material displacement takes place by the gear-like tool both in the radial direction and in the circumferential direction of the tube. Therefore, in one step, first lateral material protrusions extending substantially in the axial and radial directions and second lateral material protrusions extending substantially in the axial and circumferential directions of the tube are formed. Essentially here means that small deflections from the axial or radial or circumferential direction are included.
  • the first lateral material protrusions may be deviating by up to 20 ° from the radial direction.
  • the second material projections have a curved shape.
  • the second material projections are preferably arranged approximately at half the height of the ribs.
  • the height of the ribs is measured from the pipe wall to the fin tip and is preferably between 0.5 mm and 1.5 mm.
  • First material projections adjoin second material projections, wherein an angle of slightly greater than 90 ° is included at the boundary line.
  • pocket-like structures are created on the rib flank, which are delimited by the first and second lateral material projections. Since the condensate preferentially accumulates in these pocket-like structures due to capillary forces, the first and second lateral material protrusions must be designed to reduce the capillary forces. Large capillary forces that hold back the condensate occur on concave-shaped structures. Concave edges are formed where the first lateral material protrusions adjoin the second lateral material protrusions.
  • the aterialverlagerung by the gear-like tool in the radial direction is more pronounced than in the circumferential direction of the tube.
  • the first material projections in the radial direction can not extend further than the second material projections. Therefore, the radial extent of the first material protrusions is maximum when they start at the fin tip. The surface of the tube and the length of the convex edges are then greatly increased, but only small pocket-like structures formed.
  • a particularly advantageous embodiment is when the maximum axial extension of the first material projections in the rib tip is.
  • the surface of the tube is significantly increased by the first material protrusions, on the other hand, only small pocket-like structures are formed, which can hold back only a little condensate. It is particularly advantageous if the axial extent of the first material projections in the rib tip is.
  • Material projections from the rib tip to the second material protrusions is smaller.
  • the material projections thus taper in the direction of the tube axis.
  • the surface of the tube is significantly increased by the first material protrusions, on the other hand, the
  • the axial extension of the first material projections has a further local maximum between the fin tip and the second material projections.
  • the first material projections are achieved a large surface and a large length of the convex edge; the pocket-like structures in the region of the second material projections, however, only stretch over a small one
  • the axial extent of the first material projections along the boundary line is at most half as large as the axial extent of the second material projections. This ensures that the pocket-like structures on the rib side have only a small expression.
  • Another aspect of the invention includes a heat exchanger tube in which the first material projections in the direction of the tube axis in such a way
  • the first material protrusions may extend from the rib tip to the second material protrusions.
  • the achievable surface enlargement is particularly maximized when the first
  • Another aspect of the invention includes a heat exchanger tube in which the first material protrusions are spaced from the second material protrusions. This can be realized by the radial
  • the first material protrusions may extend radially from the fin tip and the radial extent of the first material protrusions may be less than the radial distance of the second material protrusions from the fin tip. Again, the achievable surface enlargement is maximized, especially when the first material projections begin at the fin tip.
  • Fig. 1 is a partial perspective view of a rib portion of a
  • FIG. 3 shows a section through the rib of a heat exchanger tube with a
  • FIG. 4 shows a section through the rib of a heat exchanger tube with a
  • FIG. 5 shows a section through the rib of a heat exchanger tube with a
  • first and second material protrusions 7 shows a section through the rib of a heat exchanger tube with spaced-apart first and second material projections
  • Fig. 1 shows a partial perspective view of a rib portion of a
  • Heat exchanger tube 1 with material projections 41 and 42 according to the invention. From the outside of the tube 21, only a part of one of the circumferential, integrally formed ribs 3 is shown.
  • the ribs 3 have one
  • Rib foot 31 which attaches to the pipe wall 2
  • rib flanks 32 and a
  • Rib tip 33 The ribs 3 protrude radially from the tube wall 2.
  • Rib flanks 32 are provided with additional structural elements, which are formed as material projections 41 and 42.
  • the material projections formed can be subdivided into two groups: First material projections 41 extend essentially in the axial and radial direction of the tube 1.
  • Second material projections 42 extend substantially in the axial and circumferential direction of the tube.
  • First material projections 41 adjoin second material projections 42, wherein an angle greater than 90 ° is included at the boundary line 43.
  • the surface of the tube 1 is increased.
  • convex edges 52 facing away from the rib edge edges of the material projections 41 and 42 are convex edges 52, where the condensation process preferably takes place.
  • the axial extent xi of the first material projections 41 along the boundary line 43 is smaller than the axial extent x 2 of the second material projections 42.
  • pocket-like structures are formed on the rib flank 32 51. Consequently, in a heat exchanger tube 1 according to the invention hardly Collect condensate in the pocket-like structures 51, but the
  • Fig. 2 shows in cross section an advantageous embodiment of the heat exchanger tube 1 according to the invention, in which the first material projections 41 begin near the rib tip 33 and extend in the radial direction of the tube 1 to the second material projections 42 out. Due to the manufacturing process, the first material protrusions 41 in
  • the radial extent of the first material protrusions 41 is maximum when they start at the rib tip 33.
  • the second material projections 42 are preferably mounted approximately halfway up the ribs 3.
  • the radial extension of the first material projections 41 is thus approximately equal to half the rib height in the case shown in FIG.
  • FIG. 3 shows in cross-section a particularly advantageous embodiment of the heat exchanger tube 1 according to the invention.
  • the maximum axial extent x m of the first material projections 41 is in the area of the rib tip 33. Furthermore, the axial extent xi of the first material projections 41 from the rib tip 33 is increased the second material protrusions 42 toward smaller.
  • the first material projections 41 thus taper in the direction of the tube axis.
  • the surface of the tube 1 is further enlarged by the first material projections 41 as in the case shown in Fig. 2, on the other hand, only small pocket-like structures 51 are formed, which can hold back only a little condensate.
  • Fig. 4 shows in cross-section a particularly advantageous embodiment of the heat exchanger tube 1 according to the invention.
  • the maximum axial extent x m of the first material projections 41 is in the area of the rib tip 33.
  • the axial extent xi of the first material projections 41 from the rib tip 33 is increased the second material protrusion
  • Heat exchanger tube 1 the first material projections 41 have the shape of an ear. They are similar in their mode of action to the first
  • the maximum axial extent x m of the first material projections 41 is located slightly farther from the fin tip 33 than in FIG. 3
  • Fig. 5 shows in cross section a further advantageous embodiment of the
  • the axial extent xi of the first material projections 41 has a further local maximum between the fin tip 33 and the second material projections 42.
  • the contour of the first material projections 41 is still selected so that the first material projections 41 from the rib tip 33 to the second
  • Material protrusions 42 tend to be tapered. In this advantageous
  • Another aspect of the invention includes a heat exchanger tube 1, in which the first material projections 41 taper in the direction of the tube axis such that they only adjoin the second material projections 42 at a point 44, as shown in FIG. 6.
  • This aspect of the invention provides so to speak the limiting case that the boundary line 43 shown in Fig. 1-5 is reduced between a first 41 and second 42 material protrusions to a point 44.
  • the axial extent xi of the first material projections 41 is zero at this boundary point 44. This further reduces the size of the bag-like structures 51. These can then accumulate even less condensate.
  • the surface enlargement achievable in this case is lower than in the cases shown in FIGS. 1-5. Therefore, it is advantageous that the first material projections 41 in the in Fig. 6
  • FIG. 7 Another aspect of the invention includes a heat exchanger tube 1 in which the first material protrusions 41 are spaced from the second material protrusions 42.
  • An advantageous embodiment of such a heat exchanger tube 1 according to the invention is shown in Fig. 7 in cross section.
  • the radial extension of the first material projections 41 does not extend from the rib tip 33 to the second material projections 42.
  • the first material projections 41 do not touch the second material projections 42 at any point.
  • the capillary forces that hold the condensate in the pocket-like structures 51 are minimal in this case.
  • only a smaller increase in surface area can be achieved in this case than in the cases illustrated in FIGS. 1-6. Therefore, it is particularly advantageous that the first material projections 41 begin in the case shown in Fig.
  • the solution according to the invention also includes that the structuring of the rib flanks described above is not only advantageous for the condensation of vapors, but can also have a performance-enhancing effect in other heat transfer processes. In particular, in evaporation of liquids, the evaporation process by the

Landscapes

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

Abstract

L'invention concerne un tube d'échangeur thermique (1) avec un axe de tube, une paroi de tube (2) et des nervures périphériques (3) sur le côté extérieur du tube (21). Les nervures (3) ont une base de nervure (31), des flancs de nervures (32) et un sommet de nervure (33), la base de nervure (31) faisant saillie sensiblement radialement par rapport à la paroi de tube (2). Les flancs de nervures (32) sont dotés d'éléments de structure supplémentaires, qui sont placés latéralement sur le flanc de nervure (32). Des premières saillies de matériau (41) qui s'étendent sensiblement axialement et radialement sont adjacentes à des deuxièmes saillies de matériau (42) qui s'étendent sensiblement dans le sens axial et circonférentiel du tube (1), les premières et deuxième saillies de matériau (41, 42) présentant une ligne de séparation commune (43). Selon l'invention, l'étendue axiale des premières saillies de matériau (41) le long de cette ligne de séparation (43) est plus petite que l'étendue axiale des deuxièmes saillies de matériau (42). Selon un autre aspect de l'invention, les premières saillies de matériau (41) sont chacune adjacentes en un point (44) aux deuxièmes saillies de matériau (42) et l'étendue axiale des premières saillies de matériau (41) est nulle en ce point (44). En outre, selon un autre aspect de l'invention, les premières saillies de matériau (41) sont disposées en étant espacées des deuxièmes saillies de matériau (42).
EP12791425.7A 2011-12-16 2012-11-13 Tuyaus pour condenseur avec structure de flanc complémentaire Active EP2791609B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011121436A DE102011121436A1 (de) 2011-12-16 2011-12-16 Verflüssigerrohre mit zusätzlicher Flankenstruktur
PCT/EP2012/004706 WO2013087140A1 (fr) 2011-12-16 2012-11-13 Tubes de condenseur avec structure de flanc supplémentaire

Publications (2)

Publication Number Publication Date
EP2791609A1 true EP2791609A1 (fr) 2014-10-22
EP2791609B1 EP2791609B1 (fr) 2017-10-11

Family

ID=47227753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12791425.7A Active EP2791609B1 (fr) 2011-12-16 2012-11-13 Tuyaus pour condenseur avec structure de flanc complémentaire

Country Status (8)

Country Link
US (2) US10094625B2 (fr)
EP (1) EP2791609B1 (fr)
JP (1) JP5961279B2 (fr)
DE (1) DE102011121436A1 (fr)
MX (1) MX364717B (fr)
PT (1) PT2791609T (fr)
TW (1) TWI586933B (fr)
WO (1) WO2013087140A1 (fr)

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CN101556124B (zh) * 2009-04-10 2011-11-16 金龙精密铜管集团股份有限公司 一种传热管
DE102009021334A1 (de) * 2009-05-14 2010-11-18 Wieland-Werke Ag Metallisches Wärmeaustauscherrohr
CN101949662B (zh) * 2010-09-28 2012-08-15 烟台恒辉铜业有限公司 一种电制冷机组冷凝器用换热管
DE102011121733A1 (de) * 2011-12-21 2013-06-27 Wieland-Werke Ag Verdampferrohr mit optimierter Außenstruktur

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US10974309B2 (en) 2021-04-13
EP2791609B1 (fr) 2017-10-11
JP2015500455A (ja) 2015-01-05
WO2013087140A1 (fr) 2013-06-20
TW201333409A (zh) 2013-08-16
PT2791609T (pt) 2018-01-02
US20140284036A1 (en) 2014-09-25
MX364717B (es) 2019-05-06
US20190033010A1 (en) 2019-01-31
DE102011121436A1 (de) 2013-06-20
US10094625B2 (en) 2018-10-09
MX2014005862A (es) 2014-08-27
JP5961279B2 (ja) 2016-08-02

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