CN100451530C - Copper heat-exchanging pipe of condenser for bromine refrigerator set - Google Patents
Copper heat-exchanging pipe of condenser for bromine refrigerator set Download PDFInfo
- Publication number
- CN100451530C CN100451530C CNB2005101320402A CN200510132040A CN100451530C CN 100451530 C CN100451530 C CN 100451530C CN B2005101320402 A CNB2005101320402 A CN B2005101320402A CN 200510132040 A CN200510132040 A CN 200510132040A CN 100451530 C CN100451530 C CN 100451530C
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- Prior art keywords
- fin
- heat
- exchange tube
- wing
- scope
- 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.)
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title abstract description 9
- 229910052802 copper Inorganic materials 0.000 title abstract description 9
- 239000010949 copper Substances 0.000 title abstract description 9
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 title description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 title description 3
- 229910052794 bromium Inorganic materials 0.000 title description 3
- 230000007704 transition Effects 0.000 claims description 11
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 11
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 10
- 230000005494 condensation Effects 0.000 description 7
- 238000009833 condensation Methods 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229940059936 lithium bromide Drugs 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Images
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
- F28F1/12—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
- 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
- F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
- F28D2021/0071—Evaporators
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A copper heat-exchange tube for condensers of bromide refrigerating units is made up of at least one set of adjacent polish rod part and fins part. On the outside surface of the fins part are disposed continuous single-spiral fins and the section of the fin is triangle. The ratio of the fin width to the width of the fin slot bottom is 1/3-1/5, so as to extend the cooling area of the heat-exchange tube.
Description
Technical field
The present invention relates to a kind of copper pipe, relate in particular to a kind of copper heat-exchanging pipe that is used for condenser for bromine refrigerator set.
Background technology
Determine in the London CFC (Cholrofluorocarbons from June nineteen ninety, fluorine Lyons) restriction table service time in advance, developed country mustn't use before 2000, after developing country can prolong 10 years again, the research of no CFC substitute and application, develop rapidly, no CFC substitute green, environmental protection has obtained using widely gradually, and lithium-bromide absorption-type refrigerating machine is exactly one of them.Along with the progress of science and technology, the constantly bringing forth new ideas of new technology, new method bromizated lithium formula refrigeration machine to high efficiency, miniaturization, lightweight development, also should improve as the condenser tube of refrigeration critical component in the lithium-bromide absorption-type refrigerating machine thereupon.Condenser that prior art is produced is generally bronzing facial canal or other modified heat exchanger tube on this basis with pipe at present, can not satisfy the requirement of raising the efficiency, reducing cost, saving aspects such as the energy fully.Mainly there is following defective in existing condenser with pipe: 1. the copper pipe of prior art production mostly is the special-purpose copper pipe of non-lithium-bromide absorption-type refrigerating machine, the flowing law of incompatibility lithium-bromide absorption-type refrigerating machine inner fluid, therefore heat exchange property and energy exchange are unreasonable, and efficient is lower; 2. though some heat exchanger tube increases than normal optical face copper pipe heat transfer efficiency, the overall weight that has increased unit has also increased whole manufacturing cost; Though and some heat exchanger tube wall is thin, tooth depth, light weight, unit heat exchange area strengthen, fatigue resistance is poor, easily leak, and is easy to influence unit service life, and cost is higher, and therefore the quality of existing heat exchanger tube is more unreasonable than calculating with performance; 3. for the cold rolling moulding pipe with low fin, the wing height of the outer wing of pipe and does not have wing height more than the 1.4mm on the basis of 1.2 following diapires below 1.0mm at present, so the area of dissipation of fin is less, is unfavorable for improving radiating efficiency; 4. the length that has at present the transition portion of imperfect fin between the light face of pipe and the face with fin is about about 60mm, and the transition length of imperfect fin is big more, and incomplete fin is many more, just is unfavorable for the raising of condensation performance more; 5. under the condensation of refrigerant occasion, the continuous liquid refrigerant film that condensed refrigerant forms on the outer surface of heat-transfer pipe is thick more, then the heat transfer efficiency of heat-transfer pipe is low more, and that the cross section of the fin of present heat-exchange tube is is trapezoidal, cold-producing medium is difficult for downward landing on fin, and on the outer surface of heat-exchange tube, form thicker liquid refrigerant film, therefore be unfavorable for improving heat transfer efficiency.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of liquid refrigerant film, heat-exchange tube that rate of heat exchange is high of be difficult for forming on fin.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: heat-exchange tube of the present invention is made up of at least one group of adjacent polished rod portion and fin portion, the outer surface of described fin portion is provided with fin, described fin is continuous single-screw fin, and the cross section of fin is a triangle, and the wide scope with the wide ratio of wing bottom land of described wing is 1/3-1/5; The external diameter scope of the polished rod portion of described heat-exchange tube is 15-20mm, and wall thickness range is 0.9-1.2mm, has transition part between described polished rod portion and the fin portion, and the length range of described transition part is 5-25mm.
Preferably, the wide width range of described wing is 0.25-0.65mm, and the wide width range of described wing bottom land is 0.55-0.85mm
Preferably, the wing height of described fin is 2.5-3.5 with the ratio scope of the bottom wall thickness of fin portion.
Preferably, the altitude range of described fin is 1.4-1.6mm, and the thickness range of fin portion diapire is 0.5-0.7mm.
Preferably, the scope of the normal direction angle between the axis of described single-screw fin and heat-exchange tube is 1-1.5 °.
Preferably, the pitch of described single-screw fin is a per inch 19-40 fin.
Compared with prior art, the present invention has following technological merit: 1) point and high triangle wing, when effectively increasing the outer surface heat transfer area condensate film can't be formed, condensing steam condenses into tiny drop and accumulates pearl through wing groove width place and drip rapidly and accelerate condensation rate under the situation that can't form condensate film; 2) the continuous single-screw fin and the normal direction angle (helical angle) of tubular axis line are 1～1.5 °, so little helical angle makes following rapidly of the condensation globule that converge at the wing trench bottom, avoid because of helical angle is big, drop is detained (being equivalent to the increasing of condensate film thickness) and reduces condensation effect at spiral place, capillary effect lower edge; 3) less (L is 5～25mm) to plain end, and the decreased number of imperfect fin has been equivalent to strengthen the size of radiator portion, has increased area of dissipation, improved the utilization rate of tubing, thereby radiating efficiency improves with becoming excessive section L between the wing; 4) heat-exchange tube of the present invention is according to the outer wing of instructions for use optimization, wall ratio (outer wing height/wall thickness is 2.5～3.5) and the wide ratio wide with the wing bottom land of wing (wing wide/bottom land is wide to be 1/3～1/5), the outer wing of this ratio and wall thickness, wing is wide and the wide ratio of wing bottom land can increase heat exchange area significantly, the fluid flow state of having strengthened disturbance, attenuate temperature limit interlayer has improved heat transfer efficiency; 5) heat-exchange tube of the present invention processes the fin of wing height at 1.4-1.6mm on the basis of the following bottom wall thickness of 1.2mm, therefore improve the fatigue resistance and the resistance to pressure of heat-exchange tube, had smaller volume, lighter weight and higher service life when making condenser have high heat transfer efficiency.
Description of drawings
Fig. 1 is the schematic diagram of heat-exchange tube of the present invention.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 is the partial enlarged drawing of A part among Fig. 2.
The specific embodiment
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is described in detail.
Please refer to shown in Figure 1ly, heat-exchange tube 100 of the present invention comprises the some polished rods portion 1 that is provided with at interval, fin portion 3, the transition part 11 from polished rod portion 1 to 3 transition of fin portion of band fin 31.Preferably, heat-exchange tube of the present invention 100 is made by copper product.
Please refer to shown in Figure 2ly, the scope of the outer diameter D of polished rod of the present invention portion 1 is 15-20mm, and wall thickness T is 0.9-1.2mm, and the length L scope of described transition part 11 is 5-25mm.Because the length of the transition part of existing heat-exchange tube is at least 30mm, generally be 60mm, therefore the number of the imperfect fin at transition part 11 places of heat-exchange tube 100 of the present invention is few compared to the imperfect fin number of existing heat-exchange tube, therefore strengthened the size of heat exchange section, thereby increased area of dissipation, improve the tubing utilization rate of heat-exchange tube, the efficient of heat exchange is higher.
Please refer to shown in Figure 3, the fin 31 of heat-exchange tube 100 of the present invention is for being that the combination rolling with outside system fin cutter group processes through inner core print for the tube wall of 15-20mm in outer diameter D, described fin 31 is the continuous single-screw fin around the pipe periphery, the scope of the normal direction angle (being helical angle) between the axis of described single-screw fin 31 and exchange pipe 100 is 1 °-1.5 °, in heat-exchange tube, the big more globule that then is condensate in the wing trench bottom of spiral angle is detained at spiral place, surface tension effects lower edge easily, and the helical angle number of degrees that the present invention is provided with are very little, therefore the condensation globule that converges at the wing trench bottom is following rapidly, thereby help reducing the thickness of condensate film, thereby increase condensation effect.
The scope of the pitch FPI of described fin 31 is per inch 19-40, and the scope of the thickness T f of tube wall is 0.5-0.7mm after fin 31 moulding.The scope of the drift angle B of described fin 31 is 10 °-30 °, its shape is roughly point and high triangle, point and high triangle fin 31 help its lip-deep condensing agent and flow down and hinder the formation of condensate film to the wing trench bottom, and triangle fin 31 has bigger heat transfer area, the thickness of liquid refrigerant film usually will be much smaller than the thickness of the liquid refrigerant film on the tube-surface major part on the fin 31, thereby the obstruction that heat is transmitted reduces greatly, greatly improves the heat transfer property of heat-transfer pipe.
The scope of the outer height FH of triangle fin 31 is 1.4-1.6mm, the scope of the wide W1 of wing is 0.25-0.65mm, the scope of the wide W2 of wing bottom land is 0.55-0.85mm, the wide W1 of described wing is 1.3-1/5 with the ratio range of the ratio of the wide W2 of wing bottom land, and the high FH of above-mentioned wing is 2.5-3.5 with the ratio range of the ratio of wall thickness T f, the typical structure of above-mentioned optimization can significantly increase the exchange area of heat exchange, and help improving fatigue resistance, and have certain effect for the fluidised form of disturbance liquid, therefore improved the efficient of conducting heat.
Therefore heat-exchange tube 100 of the present invention at the design of lithium-bromide absorption-type refrigerating machine inner fluid flowing law, helps improving the condenser heat exchange efficiency specially, reduces the volume of condenser, alleviates the weight of condenser, improves the service life of condenser.
When the working media of the pipe internal circulation of heat-exchange tube 100 of the present invention is water, in order to prevent to have incrustation scale on the inside pipe wall, internal tooth is not set, certainly on the inwall, if the working media of internal circulation is not water or good apparatus for eliminating sludge is arranged, then can be provided with internal tooth on the inside pipe wall.
The above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (6)
1. heat-exchange tube, form by at least one group of adjacent polished rod portion and fin portion, the outer surface of described fin portion is provided with fin, it is characterized in that: described fin is continuous single-screw fin, and the cross section of fin is a triangle, and the wide scope with the wide ratio of wing bottom land of the wing of described fin is 1/3-1/5; The external diameter scope of the polished rod portion of described heat-exchange tube is 15-20mm, and wall thickness range is 0.9-1.2mm, has transition part between described polished rod portion and the fin portion, and the length range of described transition part is 5-25mm.
2. heat-exchange tube as claimed in claim 1 is characterized in that: the wide width range of described wing is 0.25-0.65mm, and the wide width range of described wing bottom land is 0.55-0.85mm.
3. heat-exchange tube as claimed in claim 1 is characterized in that: the wing height of described fin is 2.5-3.5 with the thickness of the diapire of fin portion than scope.
4. heat-exchange tube as claimed in claim 3 is characterized in that: the altitude range of described fin is 1.4-1.6mm, and the thickness range of fin portion diapire is 0.5-0.7mm.
5. heat-exchange tube as claimed in claim 1 is characterized in that: the scope of the normal direction angle between the axis of described single-screw fin and heat-exchange tube is 1-1.5 °.
6. heat-exchange tube as claimed in claim 5 is characterized in that: the pitch of described single-screw fin is a per inch 19-40 fin.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101320402A CN100451530C (en) | 2005-12-16 | 2005-12-16 | Copper heat-exchanging pipe of condenser for bromine refrigerator set |
| JP2006105770A JP2007163119A (en) | 2005-12-16 | 2006-04-07 | Copper heat transfer tube for bromine cooling unit condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101320402A CN100451530C (en) | 2005-12-16 | 2005-12-16 | Copper heat-exchanging pipe of condenser for bromine refrigerator set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1982829A CN1982829A (en) | 2007-06-20 |
| CN100451530C true CN100451530C (en) | 2009-01-14 |
Family
ID=38165523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101320402A Active CN100451530C (en) | 2005-12-16 | 2005-12-16 | Copper heat-exchanging pipe of condenser for bromine refrigerator set |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007163119A (en) |
| CN (1) | CN100451530C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5255241B2 (en) * | 2007-07-30 | 2013-08-07 | 古河電気工業株式会社 | Heat transfer tube |
| CN103837031A (en) * | 2012-11-23 | 2014-06-04 | 宜兴市汇富机械设备有限公司 | Threaded fin heat exchange tube |
| CN112179198A (en) * | 2020-10-10 | 2021-01-05 | 东方电气(广州)重型机器有限公司 | Finned tube and heat exchanger |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049753U (en) * | 1988-09-07 | 1989-12-20 | 辽宁省抚顺市华山辽宁省石油公司抚顺分公司机械厂 | Double-side strengthened heat-transfer pipe |
| CN2164538Y (en) * | 1993-07-14 | 1994-05-11 | 无锡县金城散热管厂 | evaporation heat transfer pipe |
| CN2226744Y (en) * | 1995-01-08 | 1996-05-08 | 江苏远东波纹管集团公司 | Extrusion type joint continuous wave-shaped heat exchange tube |
| CN2240704Y (en) * | 1995-08-28 | 1996-11-20 | 华南理工大学 | Internal and external spiral tuberculated pipe with small spiral angle |
| JP2002270745A (en) * | 2001-03-12 | 2002-09-20 | Hitachi Cable Ltd | Heat radiating material with fin, and method for manufacturing the same |
| CN2572324Y (en) * | 2002-09-28 | 2003-09-10 | 江苏萃隆铜业有限公司 | Heat exchanging pipe for evaporator |
| CN2602333Y (en) * | 2002-11-05 | 2004-02-04 | 华南理工大学 | Helical fin intensiveheat transfer pipe |
| CN1143119C (en) * | 1995-07-12 | 2004-03-24 | 三洋电机株式会社 | Heat exchanger of refrigerating circulation |
-
2005
- 2005-12-16 CN CNB2005101320402A patent/CN100451530C/en active Active
-
2006
- 2006-04-07 JP JP2006105770A patent/JP2007163119A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049753U (en) * | 1988-09-07 | 1989-12-20 | 辽宁省抚顺市华山辽宁省石油公司抚顺分公司机械厂 | Double-side strengthened heat-transfer pipe |
| CN2164538Y (en) * | 1993-07-14 | 1994-05-11 | 无锡县金城散热管厂 | evaporation heat transfer pipe |
| CN2226744Y (en) * | 1995-01-08 | 1996-05-08 | 江苏远东波纹管集团公司 | Extrusion type joint continuous wave-shaped heat exchange tube |
| CN1143119C (en) * | 1995-07-12 | 2004-03-24 | 三洋电机株式会社 | Heat exchanger of refrigerating circulation |
| CN2240704Y (en) * | 1995-08-28 | 1996-11-20 | 华南理工大学 | Internal and external spiral tuberculated pipe with small spiral angle |
| JP2002270745A (en) * | 2001-03-12 | 2002-09-20 | Hitachi Cable Ltd | Heat radiating material with fin, and method for manufacturing the same |
| CN2572324Y (en) * | 2002-09-28 | 2003-09-10 | 江苏萃隆铜业有限公司 | Heat exchanging pipe for evaporator |
| CN2602333Y (en) * | 2002-11-05 | 2004-02-04 | 华南理工大学 | Helical fin intensiveheat transfer pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007163119A (en) | 2007-06-28 |
| CN1982829A (en) | 2007-06-20 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20070620 Assignee: Chongqing Longyu Precision Copper Tube Co., Ltd. Assignor: Jinlong Precision Copper Pipe Group Co., Ltd. Contract record no.: 2010500000001 Denomination of invention: Copper heat-exchanging pipe of condenser for bromine refrigerator set Granted publication date: 20090114 License type: Exclusive License Record date: 20100322 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Copper heat-exchanging pipe of condenser for bromine refrigerator set Effective date of registration: 20171215 Granted publication date: 20090114 Pledgee: China Minsheng Banking Corp Zhengzhou branch Pledgor: Wuxi Golden Dragon Kawamura Precision Tube Co., Ltd.|Chongqing Longyu Precision Copper Tube Co., Ltd.|Henan Longhui Copper Industry Co., Ltd.|Xinxiang Jinxiang Precision Pipe Fittings Co., Ltd.|Xinxiang Longteng Refrigeration Technology Co.,Ltd.|Jiangsu Canghuan Copper Industry Co.,Ltd.|Jinlong Precision Copper Pipe Group Co., Ltd.|Guangdong Longfeng Precise Copper Tube Co., Ltd. Registration number: 2017990001045 |
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| CP02 | Change in the address of a patent holder |
Address after: 404000 588 Airport Road, Wanzhou District, Chongqing (Wanzhou Economic Development Zone) Patentee after: Jinlong Precision Copper Pipe Group Co., Ltd. Address before: 453000 No. 191 Renmin West Road, Henan, Xinxiang Patentee before: Jinlong Precision Copper Pipe Group Co., Ltd. |
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Date of cancellation: 20190814 Granted publication date: 20090114 Pledgee: China Minsheng Banking Corp Zhengzhou branch Pledgor: Jinlong Precision Copper Pipe Group Co., Ltd. Registration number: 2017990001045 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Copper heat-exchanging pipe of condenser for bromine refrigerator set Effective date of registration: 20190830 Granted publication date: 20090114 Pledgee: China Minsheng Banking Corp Zhengzhou branch Pledgor: Jinlong Precision Copper Pipe Group Co., Ltd. Registration number: Y2019990000127 |
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