CN102538545A - Falling film type evaporation pipe - Google Patents
Falling film type evaporation pipe Download PDFInfo
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- CN102538545A CN102538545A CN2012100027113A CN201210002711A CN102538545A CN 102538545 A CN102538545 A CN 102538545A CN 2012100027113 A CN2012100027113 A CN 2012100027113A CN 201210002711 A CN201210002711 A CN 201210002711A CN 102538545 A CN102538545 A CN 102538545A
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- falling film
- film type
- tooth
- type evaporation
- pipe
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Abstract
The invention discloses a falling film type evaporation pipe, which comprises a smooth sleeve (2), wherein the smooth sleeve (2) is connected with a fin section (8) through a transition section (3) provided with spiral fins outside a pipe body. The falling film type evaporation pipe is characterized in that the fin section (8) comprises a pipe body (1), the spiral fins (4) are uniformly distributed outside the pipe body (1), the upper part of each spiral fin (4) is respectively provided with circumferential teeth (7) with lug bosses (5), and inner teeth (6) are uniformly arranged on the inner wall of the pipe body (1). The falling film type evaporation pipe has the advantage that the heat transfer efficiency is improved to the furthest degree.
Description
Technical field:
The present invention relates to the falling film type evaporation pipe, the new and effective heat exchanger tube of the outer evaporation heat transfer of especially a kind of enhanced tube belongs to the heat-transfer equipment technical field.
Background technology:
Because the problem of hydrostatic column height; In the evaporimeter of absorption refrigerating machine and absorber, extensively adopt the falling film type heat exchanger; Its housing moves under vacuum condition; Make the cold-producing medium spray on horizontal many rows heat-transfer pipe with certain mode, the interior refrigerating medium of pipe cools off or heats, and the refrigerating medium in utilizing the outer cold-producing medium of pipe and managing carries out heat exchange.Because the refrigerant side thermal resistance accounts for major part usually, must preferentially strengthen refrigerant side, it all is to be directed against refrigerant side reinforcement and design that a lot of heat-transfer pipes are arranged.The pipe of using at present of falling film type evaporation more widely and the cast of full-liquid type evaporation tube are similar, and it is to become wing, annular knurl through being machined into tube outer surface; Take turns roll extrusion with press polish again; So form loose structure, the core of nucleateboiling to be provided, the enhanced water evaporation heat exchange at tube-surface.This type of heat-transfer pipe generally has internal thread to strengthen intraductal heat exchange in pipe.This type heat-transfer pipe is level and smooth because of the top of its each tooth, and when refrigerant liquid sprayed manage surperficial, the cold-producing medium that has also got into the gasification core and just flows away, can not improve evaporation and heat-exchange efficient to greatest extent.
Because the problem of hydrostatic column height; In the absorber of absorption refrigerating machine, extensively adopt the falling film type heat exchanger; Its housing moves under vacuum condition; Make the cold-producing medium spray on horizontal many rows heat-transfer pipe with certain mode, the interior refrigerating medium of pipe cools off or heats, and the refrigerating medium in utilizing the outer cold-producing medium of pipe and managing carries out heat exchange.The evaporimeter of centrifugal, screw refrigerator then generally uses flooded evaporator, therefore also have the hydrostatic column height problem, and its refrigerant charging liquid measure is bigger; Be unfavorable for environmental protection, as heat-transfer pipe, the refrigerant side thermal resistance accounts for major part usually; Must preferentially strengthen refrigerant side, it all is to be directed against refrigerant side reinforcement and design that a lot of heat-transfer pipes are arranged, and the pipe of using at present of falling film type evaporation more widely and the cast of full-liquid type evaporation tube are similar; It is to become wing through being machined into tube outer surface, and annular knurl is taken turns roll extrusion with press polish again; So form loose structure, the nucleus of boiling of nucleate boiling to be provided, the enhanced water evaporation heat exchange at tube-surface.This type of heat-transfer pipe generally has internal thread to strengthen intraductal heat exchange in pipe.This type heat-transfer pipe is level and smooth because of the top of its each tooth; When refrigerant liquid sprays manage surperficial; The cold-producing medium that has does not also get into the gasification core and just flows away, the skewness of cold-producing medium, and when containing oil in the cold-producing medium; Diffusivity at tube-surface is very poor, can not improve evaporation and heat-exchange efficient to greatest extent.
Summary of the invention:
The objective of the invention is to overcome the deficiency of above-mentioned prior art and a kind of falling film type evaporation pipe that improves heat transfer efficiency to greatest extent is provided.
The object of the invention can reach through following measure: the falling film type evaporation pipe; It comprises plain tube; Plain tube is provided with helical fin outward through body changeover portion is connected with the fin section, it is characterized in that the fin section comprises body, and body is evenly distributed with helical fin outward; The top of each helical fin evenly is provided with the circumferential tooth that has boss, and the inwall of body evenly is provided with internal tooth.
In order further to realize the object of the invention, the thickness of described helical fin is 0.05 ~ 0.4mm, and the height H of helical fin is 0.3 ~ 1.5mm, and the axial spacing a of helical fin is 0.3 ~ 1.3mm.
In order further to realize the object of the invention, described circumferential tooth and tubular axis are 0 ° ~ 60 ° to angle γ, and circumferentially the circumferential spacing b between the tooth is 0.3 ~ 0.8mm, and high h is 0.05 ~ 0.4mm, and the height h2 of boss is 0.05-0.15 mm.
In order further to realize the object of the invention, described boss is vertical with the top of circumferential tooth.
In order further to realize the object of the invention, described boss is with circumferentially the tooth junction is curved, and radius of the radian R is less than 0.3 mm.
In order further to realize the object of the invention, described internal tooth has 6 ~ 60, and the height h1 of internal tooth is 0.2 ~ 0.5mm, and the pitch angle alpha will of internal tooth is 0 ° ~ 60 °, and the flute profile angle β of internal tooth is 30 ° ~ 90 °.
The present invention and existing compared with techniques have following good effect: when the present invention is used as the falling film evaporation pipe; Identical axial tooth spacing has bigger external surface area; Spray liquid is flowed down fast and form Secondary Flow simultaneously; Liquid film there are three attenuate effects, have reduced thermal resistance to greatest extent, very favourable to improving heat exchange property.Circumferentially the top of tooth is provided with boss, and this structure has further increased the external surface area of heat-transfer pipe, and makes circumferential tooth top increase more sharp point; The liquid film that makes tube surface is along the circumferential rapid diffusion of pipe, attenuate liquid film, and form Secondary Flow simultaneously; Liquid flows to the groove that constant slope is arranged of circumferential between cog, refrigerant liquid axially also can be spread what manage fast, and liquid film has been carried out the secondary attenuate; Liquid flows to axial groove liquid film is realized attenuate for the third time afterwards, and gets into vaporizationization core rapid evaporation, thereby has reduced thermal resistance to greatest extent; Strengthened evaporation heat transfer, heat exchange efficiency is improved greatly.Pipe internal surface can make tube fluid be turbulent condition with many helical tooths with certain helical angle, can obviously improve intraductal heat exchange efficient.The tooth type structures of above-mentioned uniqueness can make the existing cast of evaporation heat transfer efficient improve 10%.
Description of drawings:
Fig. 1 is an appearance assumption diagram of the present invention;
Fig. 2 is the circumferential profile of Fig. 1;
Fig. 3 is the A portion enlarged drawing of Fig. 2;
Fig. 4 is the axial section of a kind of embodiment of Fig. 1;
Fig. 5 is the A portion enlarged drawing of Fig. 4;
Fig. 6 is the axial section of the another kind of embodiment of Fig. 1;
Fig. 7 is the B portion enlarged drawing of Fig. 6.
The specific embodiment:
Below in conjunction with accompanying drawing preferred forms of the present invention is elaborated:
Embodiment 1: falling film type evaporation pipe (referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5); It comprises plain tube 2, and plain tube 2 is provided with helical fin outward through body changeover portion 3 is connected with fin section 8, and fin section 8 comprises body 1; The body 1 outer helical fin 4 that is evenly distributed with; The thickness of helical fin 4 is 0.05 ~ 0.4mm, and the height H of helical fin 4 is 0.3 ~ 1.5mm, and the axial spacing a of helical fin 4 is 0.3 ~ 1.3mm.The top of each helical fin 4 evenly is provided with the circumferential tooth 7 that has boss 5; Circumferentially tooth 7 is 0 ° ~ 60 ° with tubular axis to angle γ; Circumferentially the circumferential spacing b between the tooth 7 is 0.3 ~ 0.8mm; High h is 0.05 ~ 0.4mm, and the height h2 of boss 5 is 0.05-0.15 mm, and boss 5 is with circumferentially tooth 7 tops are vertical.The inwall of body 1 evenly is provided with 6 ~ 60 internal tooths 6, and the height h1 of internal tooth 6 is 0.2 ~ 0.5mm, and the pitch angle alpha will of internal tooth 6 is 0 ° ~ 60 °, and the flute profile angle β of internal tooth 6 is 30 ° ~ 90 °.
Embodiment 2: falling film type evaporation pipe (referring to Fig. 1, Fig. 2, Fig. 3, Fig. 6, Fig. 7), its structure are basically with embodiment 1, and its difference is that boss 5 is curved with the junction, top of circumferential tooth 7, and radius of the radian R is less than 0.3 mm.
Claims (6)
1. falling film type evaporation pipe; It comprises plain tube (2); Plain tube (2) is provided with helical fin outward through body changeover portion (3) is connected with fin section (8), it is characterized in that fin section (8) comprises body (1), the outer helical fin (4) that is evenly distributed with of body (1); The top of each helical fin (4) evenly is provided with the circumferential tooth (7) that has boss (5), and the inwall of body (1) evenly is provided with internal tooth (6).
2. falling film type evaporation pipe according to claim 1, the thickness that it is characterized in that described helical fin (4) is 0.05 ~ 0.4mm, and the height H of helical fin (4) is 0.3 ~ 1.5mm, and the axial spacing a of helical fin (4) is 0.3 ~ 1.3mm.
3. falling film type evaporation pipe according to claim 1; It is characterized in that described circumferential tooth (7) and tubular axis are 0 ° ~ 60 ° to angle γ; Circumferentially the circumferential spacing b between the tooth (7) is 0.3 ~ 0.8mm, and high h is 0.05 ~ 0.4mm, and the height h2 of boss (5) is 0.05-0.15 mm.
4. according to claim 1 or 3 described falling film type evaporation pipes, it is characterized in that described boss (5) is vertical with the top of circumferential tooth (7).
5. according to claim 1 or 3 described falling film type evaporation pipes, it is characterized in that described boss (5) is curved with circumferential tooth (7) junction, top, radius of the radian R is less than 0.3 mm.
6. falling film type evaporation pipe according to claim 1 is characterized in that described internal tooth (6) has 6 ~ 60, and the height h1 of internal tooth (6) is 0.2 ~ 0.5mm, and the pitch angle alpha will of internal tooth (6) is 0 ° ~ 60 °, and the flute profile angle β of internal tooth (6) is 30 ° ~ 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100027113A CN102538545A (en) | 2012-01-06 | 2012-01-06 | Falling film type evaporation pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100027113A CN102538545A (en) | 2012-01-06 | 2012-01-06 | Falling film type evaporation pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102538545A true CN102538545A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100027113A Pending CN102538545A (en) | 2012-01-06 | 2012-01-06 | Falling film type evaporation pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN102538545A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398617A (en) * | 2013-07-31 | 2013-11-20 | 无锡柯马机械有限公司 | High-pressure radiating pipe |
| CN103398618A (en) * | 2013-07-31 | 2013-11-20 | 无锡柯马机械有限公司 | Radiating pipe |
| CN109269337A (en) * | 2018-11-12 | 2019-01-25 | 烟台恒辉铜业有限公司 | A kind of flooded evaporator heat exchanger tube |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60144595A (en) * | 1984-01-06 | 1985-07-30 | Mitsubishi Heavy Ind Ltd | Structure of heat transfer tube of heat exchanger |
| JPH11118382A (en) * | 1997-10-14 | 1999-04-30 | Furukawa Electric Co Ltd:The | Heat transfer pipe for evaporator and manufacture thereof |
| CN2572325Y (en) * | 2002-09-28 | 2003-09-10 | 江苏萃隆铜业有限公司 | Heat-exchanging pipe for condenser |
| CN101004335A (en) * | 2007-01-15 | 2007-07-25 | 高克联管件(上海)有限公司 | Evaporation and condensation combined type heat-transfer pipe |
| CN101315260A (en) * | 2008-07-12 | 2008-12-03 | 烟台恒辉铜业有限公司 | High-efficiency heat exchange tube for heat exchanger in ammonia/carbon dioxide cascade refrigeration system |
| CN102121805A (en) * | 2011-04-07 | 2011-07-13 | 金龙精密铜管集团股份有限公司 | Enhanced heat transfer tube used for falling film evaporator |
| CN202393284U (en) * | 2012-01-06 | 2012-08-22 | 烟台恒辉铜业有限公司 | Falling-film type evaporating pipe |
-
2012
- 2012-01-06 CN CN2012100027113A patent/CN102538545A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60144595A (en) * | 1984-01-06 | 1985-07-30 | Mitsubishi Heavy Ind Ltd | Structure of heat transfer tube of heat exchanger |
| JPH11118382A (en) * | 1997-10-14 | 1999-04-30 | Furukawa Electric Co Ltd:The | Heat transfer pipe for evaporator and manufacture thereof |
| CN2572325Y (en) * | 2002-09-28 | 2003-09-10 | 江苏萃隆铜业有限公司 | Heat-exchanging pipe for condenser |
| CN101004335A (en) * | 2007-01-15 | 2007-07-25 | 高克联管件(上海)有限公司 | Evaporation and condensation combined type heat-transfer pipe |
| CN101315260A (en) * | 2008-07-12 | 2008-12-03 | 烟台恒辉铜业有限公司 | High-efficiency heat exchange tube for heat exchanger in ammonia/carbon dioxide cascade refrigeration system |
| CN102121805A (en) * | 2011-04-07 | 2011-07-13 | 金龙精密铜管集团股份有限公司 | Enhanced heat transfer tube used for falling film evaporator |
| CN202393284U (en) * | 2012-01-06 | 2012-08-22 | 烟台恒辉铜业有限公司 | Falling-film type evaporating pipe |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398617A (en) * | 2013-07-31 | 2013-11-20 | 无锡柯马机械有限公司 | High-pressure radiating pipe |
| CN103398618A (en) * | 2013-07-31 | 2013-11-20 | 无锡柯马机械有限公司 | Radiating pipe |
| CN109269337A (en) * | 2018-11-12 | 2019-01-25 | 烟台恒辉铜业有限公司 | A kind of flooded evaporator heat exchanger tube |
| CN109269337B (en) * | 2018-11-12 | 2024-01-26 | 山东恒辉节能技术集团有限公司 | Heat exchange tube for flooded evaporator |
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Application publication date: 20120704 |