CN203479126U - Braze fin aluminum flat tube used for heat exchanger - Google Patents
Braze fin aluminum flat tube used for heat exchanger Download PDFInfo
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- CN203479126U CN203479126U CN201320505041.7U CN201320505041U CN203479126U CN 203479126 U CN203479126 U CN 203479126U CN 201320505041 U CN201320505041 U CN 201320505041U CN 203479126 U CN203479126 U CN 203479126U
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- fin
- base tube
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- flat tube
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Abstract
The utility model discloses a braze fin aluminum flat tube used for a heat exchanger. The braze fin aluminum flat tube comprises an aluminum base tube, aluminum inner fins and aluminum outer fins. The base tube is flat, and the cross section of the base tube is of the structure provided with two parallel flat tube walls, wherein the two ends of one flat tube wall are connected with the two ends of the other flat rube wall through bending of the tube walls. The inner fins are arranged in an inner cavity of the base tube, the inner fins divide the inner cavity of the base tube into a plurality of channels in the extension direction, the outer fins are arranged on the outer wall bodies of the two flat tube walls of the base tube and the outer fins are connected with the outer wall bodies of the base tube through braze. The braze fin aluminum flat tube is made of aluminum or aluminum alloy, the heat conduction coefficient is increased by 2-4 times, the inner fin is additionally arranged inside the base tube so that the stability and the strength of the base tube are enhanced, deformation, in the length direction, of the base tube is reduced, and the phenomenon of unstability caused by the difference of pressures inside the base tube and outside the base tube can be resisted; the inner fins can play a role in flow guiding, enable the flow speed, in the flat tube, of thermal mediums to be evener, turbulence flow can be formed at a low speed, when phase change heat transfer exists, phase change heat transfer is made to be more sufficient and the heat exchanging efficiency is better.
Description
Technical field
The utility model belongs to heat exchanger tube, relates in particular to a kind of brazing fin aluminum flat tube for heat exchanger.
Background technology
Finned tube is a kind of core heat transfer element in air cooler, also widely applies in other heat exchange products simultaneously.Existing finned tube has only considered that the design of the outer fin of pipe is with the heat transfer of strengthening gas side, and while undergoing phase transition in the mobility of tube fluid is particularly managed, heat conduction reinforced after phase transformation considered, owing to being subject to the restriction of the factors such as geometry of tube passage, after phase transformation, condensate liquid is difficult to be uniformly distributed in pipe, causes the decline of such air cooler cooling capacity; Interior without Phase cooling occasion for pipe, overall heat transfer effect is poorer; For traditional finned tube, generally adopt the materials such as stainless steel, carbon steel, steel combined with aluminum, Solid thermal conductivity is poor, and the structure of the interspersed fin bundle of finned tube employing, easily produces gap between fin bundle and heat exchanger tube, form thermal contact resistance, thereby heat exchange efficiency is lower.
Summary of the invention
The purpose of this utility model is the technical scheme that proposes a kind of brazing fin aluminum flat tube for heat exchanger.
To achieve these goals, the technical solution of the utility model is: a kind of brazing fin aluminum flat tube for heat exchanger, comprises aluminum base tube, aluminum inner fin, the outer fin of aluminum; Wherein, described base tube is pancake pipe, the section structure of base tube is that two ends are by crooked two the parallel flat tube walls that connect of tube wall, described inner fin is arranged in the inner chamber of base tube, the inwall of inner fin and base tube links into an integrated entity, inner fin is separated into a plurality of passages by the inner chamber of base tube in extension side, described outer fin is arranged on the outer wall of two flat tube walls of base tube, and the outer wall of outer fin and base tube passes through brazing.
Further, described inner fin is uniformly distributed in the inner chamber of base tube, and to be circle, ellipse, waveform, four jiaos connect a kind of in square by circular arc to the channel shape that described inner fin is separated into base tube inner chamber; The whole machine-shaping of inner fin and base tube.
Further, the cross sectional shape of described outer fin is a kind of in snakelike, waveform, LL shape, G shape, KL shape, and the bearing of trend of outer fin and the bearing of trend of described base tube are provided with angle.
Further, the bearing of trend of described outer fin and the bearing of trend of described base tube are provided with 90 ° of angles.
Further, the wall thickness of described base tube is 1.0mm～3.0mm, and the width of the flat tube wall of described base tube is 150mm～350mm, and the spacing of the interior flat tube wall of base tube is 4mm～22mm, and the length of base tube is 3m～15m.
Further, the thickness of described outer fin is 0.2mm～0.4mm, and the height that outer fin stretches out base tube outer wall is 5mm～40mm.
Further, the material of described base tube, inner fin is aluminum or aluminum alloy, by monolithic extruded moulding; The material of outer fin is aluminium foil, adopts rolling continuously shaped, and base tube adopts brazing mode to be connected with outer fin.
Further, the brazing of two of described flat tube parallel planes and outer fin is by the brazing of scolder and solder flux.
Further, the tube wall bending of described base tube two ends is a kind of in semicircle, ellipse, circular arc bending.
The beneficial effects of the utility model are: at the inner inner fin that increases of base tube, be conducive to strengthen stability and the intensity of base tube, reduce the distortion on base tube length direction, and can resist the poor unstable phenomenon causing of base tube external and internal pressure; It is that thermal medium is more even at the inner flow velocity of flat tube that inner fin can play drainage, can under low flow velocity, form turbulent flow, and when having phase-change heat transfer, make phase-change heat transfer more abundant, and heat transfer effect is better.
Between inner fin and base tube, adopt global formation, reduce welding cost, and avoid the generation of thermal contact resistance.
Between outer fin and base tube, adopt Welding, welding effect is good, more firm compared with other fin connected modes, and can not produce thermal contact resistance.
Base tube, inner fin, outer fin adopt aluminium and aluminium alloy, can effectively improve Welding Safety, and the fin obscission of avoiding different materials thermal coefficient of expansion difference to cause.
The selection of material is aluminium and aluminium alloy, lightweight, and resistance to corrosion is strong, and cost of investment is low.
The selection of material is aluminium and aluminium alloy, and Solid thermal conductivity increases by 2～4 times.
Below in conjunction with drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is the utility model structure chart;
Fig. 2 is that the utility model base tube passage is separated into square sectional drawing;
Fig. 3 is that the utility model base tube passage is separated conglobate sectional drawing;
Fig. 4 is that the utility model base tube passage is separated into corrugated sectional drawing.
The specific embodiment
As shown in Figure 1, Figure 2, a kind of brazing fin aluminum flat tube for heat exchanger, comprises base tube 1, inner fin 2, outer fin 3; Described base tube is pancake pipe, the section structure of base tube is two parallel flat tube walls that two ends are connected by Curved tube wall, the wall thickness of base tube is 1.0mm～3.0mm, the width W of the flat tube wall of described base tube is 150mm～350mm, the spacing B of the interior flat tube wall of base tube is 4mm～22mm, and the length of base tube is 3m～15m.
Wherein, described inner fin is arranged in the inner chamber of base tube, and inner fin is connected with the inwall of base tube, and inner fin is separated into a plurality of passages by the inner chamber of base tube in extension side, and channel shape is circle, waveform, a kind of in square (comprising that four jiaos are connected by circular arc); The whole machine-shaping of inner fin and base tube.
Wherein, described outer fin is arranged on the outer wall of two flat tube walls of base tube, and the outer wall of outer fin and base tube passes through brazing.The cross sectional shape of outer fin is a kind of in snakelike, LL shape, G shape, KL shape, and the bearing of trend of outer fin and the bearing of trend of described base tube are provided with included angle A; Normally 90 ° of described angles.The thickness of described outer fin is 0.2～0.4mm, and the height H that outer fin stretches out base tube outer wall is 5mm～40mm.
Wherein, it is continuously shaped that described outer fin machining mode adopts rolling.
Wherein, the material of described base tube, inner fin, outer fin be of the same race can brazing metal; Conventionally adopt aluminum or aluminum alloy.
Described flat tube inner chamber is the passage of fluid circulation, the uniformity distributing in flat tube in order to strengthen hot fluid, the rigidity of raising flat tube, inner fin is cut apart a plurality of unit by flat tube inner chamber, in order to reduce air thermal resistance, augmentation of heat transfer, fin outside soldering outside flat tube.
Described base tube can adopt the flat tube configuration form of different-diameter according to the difference for the treatment of media in pipe.Wherein large diameter for the treatment of gas phase without phase change medium or require the occasion that resistance drop is less; The flat tube of minor diameter is for the liquid occasion without phase transformation.
Embodiment mono-,
As shown in Figure 1, Figure 2, a kind of brazing fin aluminum flat tube for heat exchanger, comprises base tube 1, inner fin 2, outer fin 3; Described base tube is pancake pipe, the section structure of base tube is two parallel flat tube walls that two ends are connected by circular arc tube wall, the wall thickness of base tube is 1.0mm～3.0mm, the width W of the flat tube wall of described base tube is 150mm～350mm, the spacing B of two flat tube walls of base tube is 4mm～22mm, and the length of base tube is 3m～15m.
In embodiment, described inner fin is separated into a plurality of passages by the inner chamber of base tube in extension side, and channel shape is square.
In embodiment, the cross sectional shape of described outer fin is snakelike, and the bearing of trend of outer fin and the bearing of trend of described base tube are provided with included angle A=90 °, and the thickness of outer fin is 0.2mm～0.4mm, and the height H that outer fin stretches out base tube outer wall is 4mm～22mm.
In embodiment, the material of described base tube, inner fin, outer fin is aluminium and aluminium alloy.
Embodiment bis-,
As Fig. 3, a kind of brazing fin aluminum flat tube for heat exchanger, has the base tube identical with embodiment mono-and outer fin, and described inner fin is separated into a plurality of passages by the inner chamber of base tube in extension side, and channel shape is circular.
In embodiment, the material of described base tube, inner fin, outer fin is aluminium and aluminium alloy.
Embodiment tri-,
As Fig. 4, a kind of brazing fin aluminum flat tube for heat exchanger, has the base tube identical with embodiment mono-and outer fin, and described inner fin is separated into a plurality of passages by the inner chamber of base tube in extension side, and channel shape is waveform.
In embodiment, the material of described base tube, inner fin, outer fin is aluminium and aluminium alloy.
Claims (9)
1. for a brazing fin aluminum flat tube for heat exchanger, comprise aluminum base tube, aluminum inner fin, the outer fin of aluminum; It is characterized in that, described base tube is pancake pipe, the section structure of base tube is that two ends are by crooked two the parallel flat tube walls that connect of tube wall, described inner fin is arranged in the inner chamber of base tube, the inwall of inner fin and base tube links into an integrated entity, inner fin is separated into a plurality of passages by the inner chamber of base tube in extension side, described outer fin is arranged on the outer wall of two flat tube walls of base tube, and the outer wall of outer fin and base tube passes through brazing.
2. a kind of brazing fin aluminum flat tube for heat exchanger according to claim 1, it is characterized in that, described inner fin is uniformly distributed in the inner chamber of base tube, and to be circle, ellipse, waveform, four jiaos connect a kind of in square by circular arc to the channel shape that described inner fin is separated into base tube inner chamber; The whole machine-shaping of inner fin and base tube.
3. a kind of brazing fin aluminum flat tube for heat exchanger according to claim 1, it is characterized in that, the cross sectional shape of described outer fin is a kind of in snakelike, waveform, LL shape, G shape, KL shape, and the bearing of trend of outer fin and the bearing of trend of described base tube are provided with angle.
4. a kind of brazing fin aluminum flat tube for heat exchanger according to claim 3, is characterized in that, the bearing of trend of described outer fin and the bearing of trend of described base tube are provided with 90 ° of angles.
5. a kind of brazing fin aluminum flat tube for heat exchanger according to claim 1, it is characterized in that, the wall thickness of described base tube is 1.0mm～3.0mm, the width of the flat tube wall of described base tube is 150mm～350mm, the spacing of the interior flat tube wall of base tube is 4mm～22mm, and the length of base tube is 3m～15m.
6. a kind of brazing fin aluminum flat tube for heat exchanger according to claim 1, is characterized in that, the thickness of described outer fin is 0.2mm～0.4mm, and the height that outer fin stretches out base tube outer wall is 5mm～40mm.
7. a kind of brazing fin aluminum flat tube for heat exchanger according to claim 1, is characterized in that, the material of described base tube, inner fin is aluminum or aluminum alloy, by monolithic extruded moulding; The material of outer fin is aluminium foil, adopts rolling continuously shaped, and base tube adopts brazing mode to be connected with outer fin.
8. a kind of brazing fin aluminum flat tube for heat exchanger according to claim 1, is characterized in that, two parallel planes of described flat tube and the brazing of outer fin are by the brazing of scolder and solder flux.
9. a kind of brazing fin aluminum flat tube for heat exchanger according to claim 1, is characterized in that, the tube wall bending of described base tube two ends is a kind of in semicircle, ellipse, circular arc bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505041.7U CN203479126U (en) | 2013-08-19 | 2013-08-19 | Braze fin aluminum flat tube used for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505041.7U CN203479126U (en) | 2013-08-19 | 2013-08-19 | Braze fin aluminum flat tube used for heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203479126U true CN203479126U (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320505041.7U Expired - Lifetime CN203479126U (en) | 2013-08-19 | 2013-08-19 | Braze fin aluminum flat tube used for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203479126U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534899A (en) * | 2014-12-26 | 2015-04-22 | 无锡博利达换热器有限公司 | Steam cooler |
| CN104633938A (en) * | 2015-01-27 | 2015-05-20 | 泛亚维德新能源科技（北京）有限公司 | Electric boiler heat exchanger |
| CN105277035A (en) * | 2014-07-11 | 2016-01-27 | 财团法人金属工业研究发展中心 | Cooling plate and method for manufacturing same |
-
2013
- 2013-08-19 CN CN201320505041.7U patent/CN203479126U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277035A (en) * | 2014-07-11 | 2016-01-27 | 财团法人金属工业研究发展中心 | Cooling plate and method for manufacturing same |
| CN104534899A (en) * | 2014-12-26 | 2015-04-22 | 无锡博利达换热器有限公司 | Steam cooler |
| CN104633938A (en) * | 2015-01-27 | 2015-05-20 | 泛亚维德新能源科技（北京）有限公司 | Electric boiler heat exchanger |
| CN104633938B (en) * | 2015-01-27 | 2018-01-30 | 泛亚维德新能源科技（北京）有限公司 | Electric boiler heat exchanger |
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| GR01 | Patent grant | ||
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Granted publication date: 20140312 |
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| CX01 | Expiry of patent term |