CN102112839A - Grooved tube for heat exchanger - Google Patents
Grooved tube for heat exchanger Download PDFInfo
- Publication number
- CN102112839A CN102112839A CN2009801301592A CN200980130159A CN102112839A CN 102112839 A CN102112839 A CN 102112839A CN 2009801301592 A CN2009801301592 A CN 2009801301592A CN 200980130159 A CN200980130159 A CN 200980130159A CN 102112839 A CN102112839 A CN 102112839A
- Authority
- CN
- China
- Prior art keywords
- heat
- heat exchanger
- trough
- pipe
- heat sink
- 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
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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
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
-
- 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
Abstract
The present invention discloses a grooved tube for a heat exchanger, wherein the grooved tube for a heat exchanger is made of 0.2% of a copper alloy having proof strength of 40 N/mm2 or more and is configured so as to satisfy the relationship of 8<bN/t<20, wherein b is the width of each of the heat sink strips, N is the number of the heat sink strips, and t is the bottom wall thickness of each of the grooves.
Description
Technical field
The present invention relates to a kind of heat exchanger trough of belt pipe, the measure that the groove when particularly how to suppress expander damages.
Background technology
Up to now, the heat-transfer pipe as the heat exchanger (so-called tube type heat exchanger) of refrigerating plant etc. uses to be formed with a plurality of grooves on the pipe internal surface in order to improve the tube having inner surface trough of heat transfer property more.For example, on the inner surface of the tube having inner surface trough of patent documentation 1, on tube axial direction, be formed with the heat sink strip of a lot of spiral extensions, between these heat sink strips, be formed with groove.Thus, compare than the so-called smooth tubes that does not have heat sink strip or groove, pipe internal surface is long-pending to be increased, and heat transfer effect is promoted.
Patent documentation 1: Japanese publication communique spy opens flat 8-174044 communique
Summary of the invention
-invent technical problem to be solved-
Yet, when the assembled heat interchanger,, expander is inserted in the tube having inner surface trough with instrument in order to allow the tube having inner surface trough that passes many fin plates be adjacent to fin plate, tube having inner surface trough is carried out expander.When this, the heat sink strip top of pipe internal surface is subjected to the extruding of expander with instrument, can be destroyed.
At this, when the critical pressure that the high pressure that is used in kind of refrigeration cycle when tube having inner surface trough surpasses cold-producing medium is so-called supercritical refrigeration cycle, height when its operating pressure is used in subcritical refrigeration cycle than this tube having inner surface trough, think that the intensity of guaranteeing pipe just needs to increase thickness.Yet if increase thickness, the expander power in the time of certainly will increasing expander again will cause that thus the pipe internal surface heat sink strip can suffer bigger destruction.The problem of obvious damage heat transfer property will appear in its result.
The present invention finishes in view of above each point.Its purpose is: the trough of belt pipe (tube having inner surface trough) that the inhibition heat exchanger is used is owing to expander destroys heat sink strip.
-be the technical solution problem technical scheme-
The invention of first aspect is to be prerequisite with the heat exchanger that forms a plurality of grooves and a plurality of prominent bars adjacent with this groove on inner surface with the trough of belt pipe.And heat exchanger of the present invention is by 0.2% endurance 40N/mm with the trough of belt pipe
2Above copper alloy is made, and the relation between the cardinal extremity width b of described prominent bar, described prominent bar quantity N and the described bottom land thickness t satisfies 8＜bN/t＜20.
In the described invention, because used the endurance copper alloy higher, so can reduce bottom land thickness t (valley bottom thickness t as shown in Figure 3) for identical design pressure (fluid pressure in the pipe) than existing phosphorized copper as material.Having, among the present invention, is that the relation that forms prominent bar cardinal extremity width b before the expander, prominent bar quantity N (being the quantity of groove) and bottom land thickness t satisfies bN/t greater than 8 and less than 20 trough of belt pipe again.As shown in Figure 6, have this relation by making it, prominent bar (heat sink strip) height behind the expander is with respect to the ratio (h/h of prominent bar (heat sink strip) height before the expander
0) be about more than 0.8.That is to say, suppressed the prominent bar damage degree that expander causes.
The invention of second aspect is in the invention of described first aspect, is used in carbon dioxide and reaches in the refrigerating circuit of the steam compression type refrigerating circulation more than the critical pressure of carbon dioxide as the cold-producing medium high pressure that circulates.
In the described invention, carrying out high pressure in refrigerating circuit, to reach overcritical pressure be so-called overcritical circulation.Therefore, the trough of belt pipe design pressure of heat exchanger uprises.Even if this situation also can reduce the bottom land thickness t of trough of belt pipe, the relation of 8＜bN/t＜20 is set up easily.
-invention effect-
Therefore, according to the present invention, be 40N/mm with 0.2% endurance because be
2Above copper alloy is made, so can reduce the bottom land thickness t, again because be that the relation that constitutes between prominent bar cardinal extremity width b, prominent bar quantity N and the bottom land thickness t satisfies 8＜bN/t＜20, wreck so suppress prominent bar (heat sink strip) really can carry out expander at pipe the time to virtually any size.
At this,, wreck for suppressing prominent bar height, as long as increase described bN/t as much as possible according to Fig. 6.Because the thick t of pipe diapire is by the design pressure decision, so in order to increase bN/t, as long as increase prominent bar cardinal extremity width b and prominent bar quantity N.Yet if increase prominent bar cardinal extremity width b, pipe internal surface is long-pending to diminish, and heat transfer property will reduce; And if increase the bar quantity N that dashes forward, pipe internal surface is long-pending can be increased, but can cause weight to increase and pressure loss increase.So, among the present invention, from suppressing the viewpoint that prominent bar height is damaged, the value of bN/t is set at greater than 8; From guaranteeing that suitable pipe internal surface is long-pending and suppress the viewpoint that weight increases and the pressure loss increases, the value of bN/t is set at less than 20.Therefore, according to the present invention,, can suppress prominent bar really and wreck guaranteeing that suitably pipe internal surface is long-pending and not causing in the scope that weight increases and the pressure loss increases.Its result can provide heat transfer property high trough of belt pipe, and then the heat exchanger that uses this trough of belt pipe is provided.
Also have, as the invention of second aspect, compare with the situation that is used in common subcritical refrigeration cycle, carry out being used in carbon dioxide circulation under the situation of refrigerating circuit of supercritical refrigeration cycle, high pressure is higher, design pressure is also high, but can restrain tank base thickness degree t thickening, and the relation of 8＜bN/t＜20 is necessarily set up.Thus, just can suppress prominent bar wrecks.Its result just can access high heat-transfer performance.
Description of drawings
Fig. 1 is the related heat-transfer pipe rip cutting profile of expression embodiment.
Fig. 2 is the related heat-transfer pipe crosscut profile of expression embodiment.
Fig. 3 is the crosscut profile at the related main position of heat-transfer pipe of expression embodiment.
Fig. 4 is enlarged areas rate and the hot curve map that transmits promotion rate relation in the expression evaporimeter.
Fig. 5 is enlarged areas rate and the hot curve map that transmits promotion rate relation in the expression radiator.
Fig. 6 is the curve map of expression bN/t and heat sink strip height change ratio relation.
-symbol description-
1 heat-transfer pipe (heat exchanger trough of belt pipe);
2 grooves;
3 heat sink strips (prominent bar)
The specific embodiment
Below, describe embodiments of the present invention in detail based on accompanying drawing.In addition, following embodiment is preferred example in essence, has no intention to limit the present invention and suitable thing thereof, or its purposes scope.
The heat exchanger of present embodiment trough of belt pipe, as the heat-transfer pipe usefulness of the heat exchanger (so-called section of jurisdiction type heat exchanger) that is arranged at refrigerating plant etc., cold-producing medium is in internal flow.Flow through the cold-producing medium of this heat exchanger, and flow through pipe ambient air or water and carry out heat exchange and evaporate or condensation with trough of belt pipe (hereinafter referred to as heat-transfer pipe 1).Also have, the heat-transfer pipe 1 of present embodiment is used for radiator or evaporimeter that carbon dioxide carries out the refrigerating circuit of steam compression type refrigerating circulation as the cold-producing medium circulation.And this refrigerating circuit is to carry out high pressure to be compressed to the above supercritical refrigeration cycle of the critical pressure of carbon dioxide.
As Fig. 1～shown in Figure 3, be formed with a plurality of heat sink strips 3 that extend spirally along tube axial direction on the inner surface of described heat-transfer pipe 1.This heat sink strip 3 constitutes section and forms the prominent bar of mountain top shape that the top attenuates.And, between described each heat sink strip 3, be formed with adjacent groove 2.The section of this groove 2 forms trapezoidal.These grooves 2 and heat sink strip 3, parallel formation, and with respect to only the tilt helical pitch angle [alpha] of regulation of tube axial direction.
At this, in the process of the heat exchanger that assembling is used as radiator or evaporimeter,, heat-transfer pipe 1 is carried out the expander operation with expanding tool for making the described heat-transfer pipe 1 and fin plate fluid-tight engagement that has passed many fin plates.The heat sink strip 3 of heat-transfer pipe 1 inner surface more or less can suffer the destruction of this expander operation.Particularly, high pressure is very high under the overcritical cycling condition, think the intensity of guaranteeing heat-transfer pipe 1, just be necessary to make valley bottom thickness t (with reference to Fig. 3) thicker than common subcritical cycle situation.If necessary expander power increases in the time of can making the expander operation so again, heat sink strip 3 further wrecks, and heat transfer property significantly descends.
So the heat-transfer pipe 1 of present embodiment is to be 40N/mm with 0.2% endurance
2Above copper alloy is made.That is to say that the heat-transfer pipe 1 employed material of present embodiment is an endurance than existing material: the good material of phosphorized copper (C1220-OL).Thus, just can reduce valley bottom thickness t for identical design pressure (flowing through the design pressure of the cold-producing medium of heat-transfer pipe 1).
Also have, the relation that the heat-transfer pipe 1 of present embodiment constitutes between the valley bottom thickness t of heat sink strip width b, heat sink strip 3 quantity N and groove 2 satisfies 8＜bN/t＜20.Heat sink strip width b constitutes prominent bar cardinal extremity width involved in the present invention.The quantity N of heat sink strip 3 constitutes prominent bar quantity involved in the present invention.Valley bottom thickness t constitutes base thickness degree involved in the present invention.
As shown in Figure 6, by above formation, because expander makes that the variation ratio of heat sink strip height h is about more than 0.8.This changes ratio, is heat sink strip height h behind the expander heat sink strip height h before than expander
0(h/h
0), its value is big more just more near " 1 ", has been subjected to inhibition with regard to representing the degree that the heat sink strip height wrecks.Value at bN/t reaches in 10 these scopes approximately, and this changes than (h/h
0) increase with this value, should change afterwards than (h/h. with being directly proportional
0) certain substantially.Like this, by bN/t being set at, just can suitably suppress the destruction of expander to heat sink strip 3 than 8 big values.Thus, reduction that just can the killer tube internal surface area, and then suppress the reduction of heat transfer property.
Its result as Fig. 4 and shown in Figure 5, compares with the heat-transfer pipe under the prior art that is formed by phosphorized copper, can improve heat and transmit promotion rate η.Specifically, in arbitrary heat exchanger of evaporimeter (Fig. 4) and radiator (Fig. 5), although compare with the enlarged areas rate σ (shown in enclosing in vain among the figure) before the expander, heat-transfer pipe 1 enlarged areas rate σ behind the expander (among the figure black triangle shown in) has reduced, but it is like that little not reduce to heat-transfer pipe under the prior art (among the figure shown in the stain).That is, compared with prior art, can suppress the reduction of enlarged areas rate σ.Therefore, also just can suppress the reduction that heat is transmitted promotion rate η.In addition, enlarged areas rate σ, be long-pending with the pipe internal surface of the smooth tubes of slotless be the long-pending increment rate of pipe internal surface of benchmark.Therefore, the enlarged areas rate σ before the expander is the highest.And the heat transmission promotion rate η of heat-transfer pipe 1 is a heat transfer property, and is basic and enlarged areas rate σ is in direct ratio.
Also have, the value that makes bN/t is less than 20 the reasons are as follows.Wreck in order to suppress the heat sink strip height, as shown in Figure 6, set the value of bN/t to such an extent that get final product more greatly as much as possible.Because valley bottom thickness t so will set bN/t bigger, will increase the quantity N of heat sink strip width b and heat sink strip by the design pressure decision in fact.Yet if heat sink strip width b is increased, pipe internal surface is long-pending to diminish, and heat transfer property will reduce.And if the quantity N of heat sink strip is increased, pipe internal surface is long-pending to be increased, but can cause the weight increase and the pressure loss to increase.So, in the present embodiment, from guaranteeing that suitable pipe internal surface is long-pending and suppress the viewpoint that weight increases and the pressure loss increases, the value of bN/t is set at less than 20.In addition, the value of the phosphorized copper heat-transfer pipe bN/t under the prior art is set at more than 20.
The effect of-embodiment-
According to aforesaid present embodiment, be to be 40N/mm with 0.2% endurance
2Above copper alloy is made, so can reduce valley bottom thickness t, also have, the quantity N and the valley bottom thickness t that constitute heat sink strip width b, heat sink strip satisfy the relation of 8＜bN/t＜20, so suitably guaranteed pipe internal surface long-pending and do not cause weight to increase and pressure loss increase scope in, can positively suppress heat sink strip 3 and wreck.Its result just can provide the high heat-transfer pipe of heat transfer property 1, and then the heat exchanger of evaporimeter and radiator etc. is provided.
Also have, be used for the carbon dioxide circulation and carry out the refrigerating circuit of supercritical refrigeration cycle, also uprise than the design pressure of the high pressure high pass heat pipe 1 of common subcritical refrigeration cycle, but can valley bottom thickness t thickening.Thus, just can suppress the fail in compression of heat sink strip 3 effectively.Its result just can obtain high heat-transfer performance.
Practicality on the-industry-
In sum, the present invention is useful to the grooved tube for heat exchanger that has a plurality of grooves on the inner surface.
Claims (2)
1. a heat exchanger trough of belt pipe is formed with a plurality of grooves and a plurality of prominent bars adjacent with this groove on the inner surface of this heat exchanger with the trough of belt pipe, it is characterized in that:
This trough of belt pipe is 40N/mm by 0.2% endurance
2Above copper alloy is made,
Satisfied 8＜bN/t＜20 that concern of the quantity N of the cardinal extremity width b of described prominent bar, described prominent bar and described bottom land thickness t.
2. heat exchanger trough of belt pipe according to claim 1 is characterized in that:
This heat exchanger is used for carbon dioxide with the trough of belt pipe and circulates as cold-producing medium, and high pressure reaches the refrigerating circuit of the above steam compression type refrigerating circulation of the critical pressure of carbon dioxide.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008200582A JP5446163B2 (en) | 2008-08-04 | 2008-08-04 | Grooved tube for heat exchanger |
| JP2008-200582 | 2008-08-04 | ||
| PCT/JP2009/003554 WO2010016198A1 (en) | 2008-08-04 | 2009-07-28 | Grooved tube for heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102112839A true CN102112839A (en) | 2011-06-29 |
| CN102112839B CN102112839B (en) | 2013-06-05 |
Family
ID=41663427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801301592A Active CN102112839B (en) | 2008-08-04 | 2009-07-28 | Grooved tube for heat exchanger |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20110132589A1 (en) |
| EP (1) | EP2320188A4 (en) |
| JP (1) | JP5446163B2 (en) |
| KR (1) | KR20110031241A (en) |
| CN (1) | CN102112839B (en) |
| AU (1) | AU2009278653B2 (en) |
| WO (1) | WO2010016198A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY166376A (en) * | 2011-08-04 | 2018-06-25 | Uacj Corp | Seamless pipe, level wound coil, cross fin tube-type heat exchanger, and method for producing cross fin tube-type heat exchanger |
| KR101881659B1 (en) * | 2016-11-14 | 2018-07-24 | 경희대학교 산학협력단 | Heat transfer tube having rare-earth oxide superhydrophobic surface and manufacturing method therefor |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2839662B2 (en) * | 1990-07-12 | 1998-12-16 | 株式会社東芝 | High thermal conductive copper alloy and heat exchanger using this copper alloy |
| MY110330A (en) * | 1991-02-13 | 1998-04-30 | Furukawa Electric Co Ltd | Heat-transfer small size tube and method of manufacturing the same |
| US6164370A (en) * | 1993-07-16 | 2000-12-26 | Olin Corporation | Enhanced heat exchange tube |
| US5381600A (en) * | 1993-10-06 | 1995-01-17 | Ford Motor Company | Heat exchanger and method of making the same |
| JPH085278A (en) * | 1994-06-20 | 1996-01-12 | Mitsubishi Shindoh Co Ltd | Heat transfer tube with inner surface grooves |
| JPH08174044A (en) | 1994-12-28 | 1996-07-09 | Kobe Steel Ltd | Production of small-diameter heat transfer tube with groove on inside surface |
| CA2179448A1 (en) * | 1995-07-12 | 1997-01-13 | Atsuyumi Ishikawa | Heat exchanger for refrigerating cycle |
| JP3414294B2 (en) * | 1999-01-07 | 2003-06-09 | 三菱マテリアル株式会社 | ERW welded copper alloy tube for heat exchanger with excellent 0.2% proof stress and fatigue strength |
| FR2837270B1 (en) * | 2002-03-12 | 2004-10-01 | Trefimetaux | GROOVED TUBES FOR REVERSIBLE USE FOR HEAT EXCHANGERS |
| JP3964244B2 (en) * | 2002-03-27 | 2007-08-22 | 株式会社コベルコ マテリアル銅管 | Internal grooved tube |
| JP3794341B2 (en) * | 2002-03-28 | 2006-07-05 | 株式会社コベルコ マテリアル銅管 | Internal grooved tube and manufacturing method thereof |
| CN2622656Y (en) * | 2003-04-03 | 2004-06-30 | 河南金龙精密铜管股份有限公司 | Slim tooth internal thread seamoless high efficiency heat transfer tube |
| JP4096824B2 (en) * | 2003-06-19 | 2008-06-04 | 株式会社デンソー | Vapor compression refrigerator |
| JP4339665B2 (en) * | 2003-10-31 | 2009-10-07 | 住友軽金属工業株式会社 | Manufacturing method of heat exchanger |
| DE102006013384B4 (en) * | 2006-03-23 | 2009-10-22 | Wieland-Werke Ag | Use of a heat exchanger tube |
| JP2007271123A (en) * | 2006-03-30 | 2007-10-18 | Kobelco & Materials Copper Tube Inc | Inner face-grooved heat transfer tube |
| JP2008020166A (en) * | 2006-07-14 | 2008-01-31 | Kobelco & Materials Copper Tube Inc | Inner surface grooved heat-transfer tube for evaporator |
| JP5006155B2 (en) * | 2006-10-19 | 2012-08-22 | 古河電気工業株式会社 | Heat transfer tube |
| ES2427863T3 (en) * | 2008-04-24 | 2013-11-04 | Mitsubishi Electric Corporation | Heat exchanger and air conditioning that uses the same |
-
2008
- 2008-08-04 JP JP2008200582A patent/JP5446163B2/en active Active
-
2009
- 2009-07-28 WO PCT/JP2009/003554 patent/WO2010016198A1/en active Application Filing
- 2009-07-28 US US13/057,304 patent/US20110132589A1/en not_active Abandoned
- 2009-07-28 EP EP09804685.7A patent/EP2320188A4/en not_active Withdrawn
- 2009-07-28 CN CN2009801301592A patent/CN102112839B/en active Active
- 2009-07-28 AU AU2009278653A patent/AU2009278653B2/en active Active
- 2009-07-28 KR KR1020117003585A patent/KR20110031241A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010016198A1 (en) | 2010-02-11 |
| AU2009278653A1 (en) | 2010-02-11 |
| CN102112839B (en) | 2013-06-05 |
| EP2320188A4 (en) | 2014-03-12 |
| AU2009278653B2 (en) | 2013-02-07 |
| KR20110031241A (en) | 2011-03-24 |
| JP2010038417A (en) | 2010-02-18 |
| EP2320188A1 (en) | 2011-05-11 |
| JP5446163B2 (en) | 2014-03-19 |
| US20110132589A1 (en) | 2011-06-09 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |