CN102564195A - Falling film type evaporation pipe - Google Patents
Falling film type evaporation pipe Download PDFInfo
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- CN102564195A CN102564195A CN2012100061311A CN201210006131A CN102564195A CN 102564195 A CN102564195 A CN 102564195A CN 2012100061311 A CN2012100061311 A CN 2012100061311A CN 201210006131 A CN201210006131 A CN 201210006131A CN 102564195 A CN102564195 A CN 102564195A
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- falling film
- film type
- type evaporation
- tooth
- evaporation pipe
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Abstract
The invention discloses a falling film type evaporation pipe, which comprises a smooth pipe (2). The smooth pipe (2) is connected with a fin section (8) through a transitional section (3) with helical fins outside a tube body. The falling film type evaporation pipe is characterized in that the fin section (8) comprises the tube body (1), the helical fins (4) are uniformly distributed outside the tube body (1), the upper portions of the helical fin (4) is uniformly provide with peripheral teeth (7) with grooves (5), and the inner wall of the tube body (1) is uniformly provided with inner teeth (6). Using the falling film type evaporation pipe can improve heat transfer efficiency to the maximum extent.
Description
Technical field:
The present invention relates to a kind of 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 cold-producing medium is bigger towards liquid measure; 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: a kind of 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 groove, 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 degree of depth h2 of groove is 0.05-0.15 mm.
In order further to realize the object of the invention, described groove 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 groove, 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 gasification 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 Fig. 1;
Fig. 5 is the A portion enlarged drawing of Fig. 4.
The specific embodiment:
Below in conjunction with accompanying drawing preferred forms of the present invention is elaborated:
Embodiment: a kind of falling film type evaporation pipe is (referring to Fig. 1-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 groove 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, and high h is 0.05 ~ 0.4mm, and the degree of depth h2 of groove 5 is 0.05-0.15 mm; Groove 5 is curved with the junction, top of circumferential tooth 7, and radius of the radian R is less than 0.3 mm.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 °.
Claims (5)
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 groove (5), and the inwall of body (1) evenly is provided with internal tooth (6).
2. a kind of 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. a kind of 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 degree of depth h2 of groove (5) is 0.05-0.15 mm.
4. according to claim 1 or 3 described a kind of falling film type evaporation pipes, it is characterized in that described groove (5) is curved with circumferential tooth (7) junction, top, radius of the radian R is less than 0.3 mm.
5. a kind of falling film type evaporation pipe according to claim 1; It is characterized in that described internal tooth (6) has 6 ~ 60; 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 |
|---|---|---|---|
| CN2012100061311A CN102564195A (en) | 2012-01-06 | 2012-01-06 | Falling film type evaporation pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100061311A CN102564195A (en) | 2012-01-06 | 2012-01-06 | Falling film type evaporation pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102564195A true CN102564195A (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100061311A Pending CN102564195A (en) | 2012-01-06 | 2012-01-06 | Falling film type evaporation pipe |
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| Country | Link |
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| CN (1) | CN102564195A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066761A (en) * | 2015-09-22 | 2015-11-18 | 烟台恒辉铜业有限公司 | Evaporating pipe with narrow-gap steam exhaust opening |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549606A (en) * | 1982-09-08 | 1985-10-29 | Kabushiki Kaisha Kobe Seiko Sho | Heat transfer pipe |
| CN1129316A (en) * | 1994-11-17 | 1996-08-21 | 运载器有限公司 | Heat transfer tube |
| 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 |
| WO2009009426A2 (en) * | 2007-07-06 | 2009-01-15 | Wolverine Tube, Inc. | Finned tube with stepped peaks |
| CN101498532A (en) * | 2008-02-01 | 2009-08-05 | 金龙精密铜管集团股份有限公司 | Evaporating tube for central air-conditioner |
| CN201787852U (en) * | 2010-08-11 | 2011-04-06 | 烟台恒辉铜业有限公司 | Y-shaped fin heat exchange tube |
| 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 |
| CN202393283U (en) * | 2012-01-06 | 2012-08-22 | 烟台恒辉铜业有限公司 | Falling-film-type evaporation tube |
-
2012
- 2012-01-06 CN CN2012100061311A patent/CN102564195A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549606A (en) * | 1982-09-08 | 1985-10-29 | Kabushiki Kaisha Kobe Seiko Sho | Heat transfer pipe |
| CN1129316A (en) * | 1994-11-17 | 1996-08-21 | 运载器有限公司 | Heat transfer tube |
| WO2009009426A2 (en) * | 2007-07-06 | 2009-01-15 | Wolverine Tube, Inc. | Finned tube with stepped peaks |
| CN101498532A (en) * | 2008-02-01 | 2009-08-05 | 金龙精密铜管集团股份有限公司 | Evaporating tube for central air-conditioner |
| 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 |
| CN201787852U (en) * | 2010-08-11 | 2011-04-06 | 烟台恒辉铜业有限公司 | Y-shaped fin heat exchange tube |
| 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 |
| CN202393283U (en) * | 2012-01-06 | 2012-08-22 | 烟台恒辉铜业有限公司 | Falling-film-type evaporation tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066761A (en) * | 2015-09-22 | 2015-11-18 | 烟台恒辉铜业有限公司 | Evaporating pipe with narrow-gap steam exhaust opening |
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Application publication date: 20120711 |