CN102636068B - Asymmetric fin condenser pipe - Google Patents
Asymmetric fin condenser pipe Download PDFInfo
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- CN102636068B CN102636068B CN 201210140045 CN201210140045A CN102636068B CN 102636068 B CN102636068 B CN 102636068B CN 201210140045 CN201210140045 CN 201210140045 CN 201210140045 A CN201210140045 A CN 201210140045A CN 102636068 B CN102636068 B CN 102636068B
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Abstract
The invention discloses an asymmetric fin condenser pipe, which comprises a heat exchanging pipe body, fins arranged on the outer surface of the pipe body and a spiral groove arranged in the pipe body. The asymmetric fin condenser pipe is characterized in that the fin arranged on the outer surface of the pipe body is of a geometrical shape with asymmetric upper and lower parts; the upper part of each fin is a semi-circle fin; and at least two fan-shaped notches are arranged on the lower part of each fin, so that one or a plurality of ladder-shaped fins are formed. With the adoption of the asymmetric fin condenser pipe provided by the invention, the shortages of a common condenser pipe are overcome, so that the liquor drainage of the condenser heat exchanging pipe can be realized rapidly, the liquid film thickness of the condenser heat exchanging pipe can be reduced, and therefore, the better heat exchanging efficiency can be realized.
Description
Technical field
The present invention relates to a kind of condensing heat-exchanging pipe, especially a kind of design has the condenser pipe of asymmetric fin.
Background technology
Condenser is the visual plant in many industrial processes, for example, and the condenser in the central air conditioner system handpiece Water Chilling Units.The quality of condenser performance depends on the exchange performance quality to a great extent.
Condensing heat-exchanging pipe is the body with inner chamber, and inboard wall of tube body smooth surface or inner wall surface are axially arranged with the conduit of shape distribution in the shape of a spiral along body usually; The tube wall surface is for smooth surface or have the fin that distributes along the axial shape in the shape of a spiral of body, claims that usually the latter is finned tube.Generally speaking, the axisymmetric shape of fin shape centered by the tubular axis line is as garden shape fin; Be the symmetric shape of the plane of symmetry with tubular axis line plane perhaps, as elliptical tube.
When condenser working, cold water flows through in the condensing heat-exchanging pipe of horizontal positioned, by with the heat exchange of tube wall, reduced tube wall temperature.When the steam outside the heat exchanger tube with after tube wall contacts, produce condensation.The condensing fin heat exchanger tube can improve the coefficient of heat transfer of heat exchanger tube, its operation principle: fin can increase heat exchange area greatly on the one hand, has increased the heat exchange effect; In addition on the one hand, utilize the capillary force can reducer film thickness enhanced heat exchange.Specifically be described below: according to hydrodynamics and physics principle, the root of condensed fluid between two fins, and the interface between the vapor phase is curved surface, radius of curvature is oriented to the radius extending direction of heat exchanger tube, under the surface tension effects of liquid, the pressure of liquid will be lower than the pressure of extraneous vapor phase under the meniscus.There is one deck liquid film in fin surface by condensation because liquid film is very thin, and and vapor phase between the interface be flat, can think that the pressure in the liquid film equals the pressure of vapor phase.So the pressure in the fin surface liquid film will be higher than the pressure of liquid under the meniscus, therefore, under capillary effect, accelerated flowing of fin surface liquid, reduced the fin surface thickness of liquid film.In the condensing heat-exchange process, owing to have liquid film on the cold wall, steam can not directly contact with cold wall, carry out heat exchange but contact with liquid film, carry out heat exchange again by liquid film and cold wall then, in this process, liquid film becomes the thermal resistance of condensing heat-exchange, and liquid film is more thick, and thermal resistance is more big.As mentioned above, in the root of finned tube, there is meniscus, under the surface force effect, attenuate fin surface thickness of liquid film the time, improved the condensing heat-exchange coefficient of finned tube greatly.
But because the shape of fin is symmetrical, all can produce meniscus at the fin root, its radius of curvature direction all is outside radially pointing to, and the capillary force that produces is pointed to the axle center of pipe.For the fin on heat exchanger tube top, the liquid film on it flows to the fin root under the capillary force effect, attenuate the thickness of liquid film of fin surface; But for the fin of heat exchanger tube bottom, the liquid film on it is difficult for drippage by the capillary force effect, be deposited in the heat exchanger tube bottom, form viscous flow liquid, in this case, the fin of heat exchanger tube bottom is submerged in the liquid together with the parent tube sub-surface, greatly reduces heat exchange property.
In order to solve this deficiency, the following solution of special proposition.
Summary of the invention
The present invention seeks to: provide a kind of faster discharge opeing from the condensing heat-exchanging pipe, the thickness of liquid film of attenuate condensing heat-exchanging pipe, the consequently asymmetric fin condenser pipe of better heat exchange efficiency
Technical scheme of the present invention is: a kind of asymmetric fin condenser pipe, comprise heat exchange tube body, the spiral channel in the fin on the outer surface of tube body and the pipe is characterized in that, fin on the described outer surface of tube body is non-symmetrical geometries up and down, and described fin the first half is semicircle fin; At least two sector notch of described fin the latter half setting form one or more trapezoidal fins.
Further, the breach of the trapezoidal fin of described the latter half is up to the fin root, and the breach on a plurality of fins forms groove vertically.
Further, asymmetric fin axially evenly distributes along heat exchange tube body, and every meter arranges 750 ~ 1900.
Further, the height of described trapezoidal fin is 0.4 ~ 2.0mm.
Further, the gash depth 0.2-0.4mm of described pipe inside spin conduit, quantity is 20 ~ 60.
Operation principle of the present invention:
Condensing heat-exchanging pipe arranges fin, mainly be the interface formation meniscus by liquid and steam between the root of adjacent fins, under the surface tension of liquid effect, form radial load, because outside the radius of curvature direction point tube of meniscus, therefore, the action direction point tube axle center of capillary force.This active force radially is favourable for the fin of heat exchanger tube the first half, and capillary force direction and gravity direction are basic identical, and the liquid that it can accelerate fin surface flows to the fin root, and the thickness of liquid film of attenuate fin surface improves the condensing heat-exchange coefficient; In contrast, capillary force has radially played inhibition for the fin condensing heat-exchange of heat exchanger tube the latter half.The direction of capillary force is opposite with gravity direction, offset the gravity effect, make the liquid of fin surface of heat exchanger tube the latter half be not easy to break away from heat exchanger tube, be deposited in the heat exchanger tube bottom and cause the liquid film of fin surface of the latter half of heat exchanger tube very thick, influenced the heat exchange effect.The fin that the present invention proposes in the heat exchanger tube bottom processes sector notch, remaining fin shape
One of shape formation is trapezoidal or a plurality of trapezoidal.Cause fin shape asymmetric up and down, first half fin is kept semi-circular shape, the radial capillary power of still utilizing the meniscus at the liquids and gases interface between the fin to cause, and that accelerates fin surface liquid flows the reducer film thickness.The latter half fin is owing to be provided with at least two sector notch, and the degree of depth of breach reaches the fin root, and causing the sectorial area root is light pipe; Thereby destroyed liquid and gas interface shape, and can't form radial capillary power, strengthened the effect of gravity to liquid film, make liquid break away from heat exchanger tube as early as possible; Simultaneously, because sector notch causes one or more trapezoidal fin surfaces, the discharge opeing that trapezoidal geometry can accelerating liquid.
Advantage of the present invention is:
The asymmetric fin condenser pipe of the present invention has solved the deficiency of conventional condenser pipe, can be from faster discharge opeing on the condensing heat-exchanging pipe, and the thickness of liquid film of attenuate condensing heat-exchanging pipe, thus reach the beneficial effect of better heat exchange efficiency.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is the asymmetric fin condenser pipe of the present invention structural representation;
Fig. 2 is the A-A view of Fig. 1.
Wherein: 1, heat exchange tube body light pipe section, 2, semicircle fin, 3, trapezoidal fin, 4, pipe inside spin conduit.
The specific embodiment
Below in conjunction with specific embodiment such scheme is described further.Should be understood that these embodiment are not limited to limit the scope of the invention for explanation the present invention.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.
Embodiment:
As Fig. 1 ~ shown in Figure 2, a kind of asymmetric fin condensing heat-exchanging pipe, diameter equals 19mm, wall thickness 1.2mm.Its two ends are heat exchange tube body light pipe section 1, and its effect is after heat exchanger tube passes the both sides end plate of shell and tube exchanger, can be closely fixing with end plate.The first half of each fin is semicircle fin 2, and the latter half is that 3 trapezoidal fins 3 evenly distribute, and its trapezoidal height is 1.0mm, equates with the height of the semicircle fin on heat exchanger tube top.Trapezoidal fin thickness equates that with the first half fin thickness fin density is 1600/m.The gash depth 0.2-0.4mm of pipe inside spin conduit 4, quantity is 20 ~ 60.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.
Claims (5)
1. an asymmetric fin condenser pipe comprises heat exchange tube body, and the spiral channel in the fin on the outer surface of tube body and the pipe is characterized in that, the fin on the described outer surface of tube body is non-symmetrical geometries up and down, and described fin the first half is semicircle fin; At least two sector notch of described fin the latter half setting form one or more trapezoidal fins.
2. asymmetric fin condenser pipe according to claim 1 is characterized in that, the breach of the trapezoidal fin of described the latter half is up to the fin root, and the breach on a plurality of fins forms groove vertically.
3. asymmetric fin condenser pipe according to claim 1 is characterized in that, asymmetric fin axially evenly distributes along heat exchange tube body, and every meter arranges 750 ~ 1900.
4. asymmetric fin condenser pipe according to claim 1 is characterized in that, the height of described trapezoidal fin is 0.4 ~ 2.0mm.
5. asymmetric fin condenser pipe according to claim 1 is characterized in that, the gash depth 0.2-0.4mm of described pipe inside spin conduit, and quantity is 20 ~ 60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210140045 CN102636068B (en) | 2012-05-09 | 2012-05-09 | Asymmetric fin condenser pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210140045 CN102636068B (en) | 2012-05-09 | 2012-05-09 | Asymmetric fin condenser pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102636068A CN102636068A (en) | 2012-08-15 |
| CN102636068B true CN102636068B (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210140045 Active CN102636068B (en) | 2012-05-09 | 2012-05-09 | Asymmetric fin condenser pipe |
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| CN (1) | CN102636068B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225089B (en) * | 2018-01-09 | 2023-10-24 | 苏州新太铜高效管有限公司 | Condenser tube for reinforcing drainage and oil discharge |
| CN108759184B (en) * | 2018-08-13 | 2024-05-10 | 珠海格力电器股份有限公司 | Condenser pipe and condenser |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5659194A (en) * | 1979-10-20 | 1981-05-22 | Daikin Ind Ltd | Heat transfer tube |
| CN2336313Y (en) * | 1998-08-10 | 1999-09-01 | 深圳世能实业有限公司 | Axial finned coal saver tube |
| JP2005315556A (en) * | 2004-03-31 | 2005-11-10 | Kobelco & Materials Copper Tube Inc | Inner-grooved pipe |
| CN1789880A (en) * | 2005-12-16 | 2006-06-21 | 华南理工大学 | Integral external finned tube and method for manufacturing the same |
| JP2008309442A (en) * | 2007-06-18 | 2008-12-25 | Daikin Ind Ltd | Heat transfer pipe and heat exchanger |
| CN202582325U (en) * | 2012-05-09 | 2012-12-05 | 苏州新太铜高效管有限公司 | Asymmetric finned condensation pipe |
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2012
- 2012-05-09 CN CN 201210140045 patent/CN102636068B/en active Active
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| Publication number | Publication date |
|---|---|
| CN102636068A (en) | 2012-08-15 |
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