CN102878850B - Foam metal fins and porous flat tube micro-channel heat exchanger with foam metal fins - Google Patents
Foam metal fins and porous flat tube micro-channel heat exchanger with foam metal fins Download PDFInfo
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- CN102878850B CN102878850B CN201210334055.7A CN201210334055A CN102878850B CN 102878850 B CN102878850 B CN 102878850B CN 201210334055 A CN201210334055 A CN 201210334055A CN 102878850 B CN102878850 B CN 102878850B
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Abstract
The invention discloses foam metal fins and a porous flat tube micro-channel heat exchanger with the foam metal fins. The fins are arranged between adjacent flat tubes of the micro-channel heat exchanger; the fins consist of first fins and second fins which are made of foam metal; the first fins comprise two parallel thin layer structures; the second fins which are arranged at intervals are uniformly distributed between the two thin layer structures; and the second fins can be one of triangular prisms of which the sections are isosceles triangles, triangular prisms of which the sections are analogous isosceles triangles and the waist lines are arcs, quadrangular prisms of which the sections are isosceles trapezoids, and quadrangular prisms of which the sections are analogous isosceles trapezoids and the waist lines are arcs. The foam metal is applied to the fins of the micro-channel heat exchanger; through the through holes inside the foam metal, flowing air can produce complex three-dimensional flow, the heat exchange area at an air side is increased, and exchange coefficient and unit heat exchange capacity of the fins are increased, so that heat exchange efficiency and comprehensive performance of the micro-channel heat exchanger are effectively improved.
Description
Technical field
The present invention relates to a kind of heat exchange or heat-transfer equipment and parts thereof, in particular, relate to increase heat exchange or heat-transfer equipment and the parts thereof of heat transfer area structure.
Background technology
Originally micro-channel heat exchanger is in electronic heating element and small size gas turbine, to apply morely, has now expanded to air conditioning for automobiles, central air-conditioning and domestic air conditioning field, and it has a extensive future.Micro-channel heat exchanger is applied in air-conditioning, to have following advantage: heat transfer efficiency is high; Can make the volume-diminished of air-conditioning, weight saving; Do not use copper material expensive, shortage of resources; Can reduce the filling quantity of cold-producing medium etc.
But the many aluminum sheet of the fin of existing micro-channel heat exchanger, easily bending, and conventionally make blinds punching form to increase heat transfer outside a tube area, however it is always limited in plane, to increase pipe outside heat exchange area.Particularly, for micro-channel heat exchanger, because its caliber is less, cause the long-pending fin area that can increase in tube outside very limited.
Therefore, how to improve the heat exchange property of micro-channel heat exchanger, become the focus of current micro-channel heat exchanger research.
Summary of the invention
The present invention will solve is the technical problem that the heat exchange property of existing micro-channel heat exchanger has much room for improvement, a kind of foam metal fin is provided and has there is the micro-channel heat exchanger of this fin, by novel fin configuration, can improve heat exchange efficiency and the combination property of micro-channel heat exchanger.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
A kind of foam metal fin, be arranged between the adjacent flat tube of micro-channel heat exchanger, the second fin that the first fin that this fin is made by foam metal and foam metal are made forms, described the first fin comprises two laminate structures that are parallel to each other, between two described laminate structures, be evenly equipped with spaced the second fin, described the second fin is selected from the tri-prismoid that cross section is isosceles triangle, cross section is the tri-prismoid that class isosceles triangle and its waist are camber line, cross section is the four prisms cylinder of isosceles trapezoid, cross section is wherein a kind of of class isosceles trapezoid and its waist four prisms cylinder that is camber line,
In the tri-prismoid of all described the second fins, the summit of isosceles triangle or class isosceles triangle is all between the side of two laminate structure the same faces of described the first fin, and base is all between the side of two laminate structure another sides of described the first fin; In four prisms cylinder, the shorter base of isosceles trapezoid or class isosceles trapezoid is all between the side of two laminate structure the same faces of described the first fin, and longer base is all between the side of two laminate structure another sides of described the first fin.
Described foam metal is wherein a kind of of foam copper, foamed aluminium, foam iron or nickel foam.
The aperture of described foam metal is 0.05 ~ 4mm.
The laminate structure thickness of described the first fin is 0.1 ~ 5mm.
The tri-prismoid of described the second fin or the height of column of four prisms cylinder are 5 ~ 20mm.
In the tri-prismoid of described the second fin, the base length of isosceles triangle or class isosceles triangle is 0.5 ~ 2mm; In the four prisms cylinder of described the second fin, the longer base length of isosceles trapezoid or class isosceles trapezoid is 0.5 ~ 2mm.
In the tri-prismoid of described the second fin, the summit of isosceles triangle or class isosceles triangle is 10 ~ 30mm to the vertical range on base; In the four prisms cylinder of described the second fin, the vertical range on the Dao compare Chang base, shorter base of isosceles trapezoid or class isosceles trapezoid is 10 ~ 30mm.
In the tri-prismoid of adjacent described the second fin, in isosceles triangle or class isosceles triangle, four prisms cylinder, the distance between the line of symmetry of isosceles trapezoid or class isosceles trapezoid is 1 ~ 2mm.
A micro-channel heat exchanger, comprises a plurality of flat tubes, is provided with above-mentioned foam metal fin between adjacent described flat tube.
The invention has the beneficial effects as follows:
Foam metal is comprised of rigid backbone and interior bone hole, has excellent physical characteristic and good mechanical performance, and its proportion is little, be difficult for bending, specific area is large, heat exchange heat-sinking capability is high.
The present invention is applied to foam metal the fin of micro-channel heat exchanger, mobile air is by the via holes of foam metal inside, can produce complicated Three-dimensional Flow, temperature field and Flow Field Distribution that air is formed are more rational, increase the heat exchange area of air side, improve the coefficient of heat transfer and the unit exchange capability of heat of fin, thereby effectively improve micro-channel heat exchanger heat exchange efficiency and combination property.
The present invention becomes fin design the fin shape of different cross section form and interval to arrange simultaneously, can reduce the flow resistance of foam metal, further increase air side heat exchange area, and between adjacent flat tube, form the passage of wedge shape, because the circulation area of air in passage is descending, air accelerates, and can strengthen heat exchange; The mutual use of the first fin and the second fin contributes to the integral manufacturing of fin, and the enhancing firmness of being combined with flat tube.
Accompanying drawing explanation
Fig. 1 is the shape schematic diagram of six kinds of forms of the second fin provided by the present invention;
Wherein, (a) be that cross section is the tri-prismoid of isosceles triangle;
(b) be that cross section is that class isosceles triangle and its waist are the tri-prismoid of concave arc line;
(c) be that cross section is that class isosceles triangle and its waist are the tri-prismoid of convex arc line;
(d) be that cross section is the four prisms cylinder of isosceles trapezoid;
(e) be that cross section is that class isosceles trapezoid and its waist are the four prisms cylinder of concave arc line;
(f) be that cross section is that class isosceles trapezoid and its waist are the four prisms cylinder of convex arc line;
Fig. 2 is the structural representation of micro-channel heat exchanger provided by the present invention;
Fig. 3 is the B-B profile of Fig. 2;
Fig. 4 is that in Fig. 2, the part of A part sends out figure large;
Fig. 5 is the side view of G direction in Fig. 4;
Fig. 6 is the C-C profile of Fig. 4;
Fig. 7 is when the second fin is Fig. 1 (a) form, the D-D profile of Fig. 4;
Fig. 8 is when the second fin is Fig. 1 (b) form, the D-D profile of Fig. 4;
Fig. 9 is when the second fin is Fig. 1 (e) form, and in Fig. 2, the part of A part sends out figure large;
Figure 10 is the side view of H direction in Fig. 9;
Figure 11 is the E-E profile of Fig. 9;
Figure 12 is the F-F profile of Fig. 9.
In figure: 1, flat tube; 2, fin; 21, the first fins; 22, the second fins; 3, liquid trap; 4, distributing pipe.
The specific embodiment
For further understanding summary of the invention of the present invention, feature and effect, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
The present embodiment has disclosed a kind of foam metal fin and has had the micro-channel heat exchanger of this fin, and as shown in Figure 2, micro-channel heat exchanger comprises liquid trap 3 and the distributing pipe 4 at two ends, and liquid trap 3 and distributing pipe 4 are that cylinder and bottom surface radius are 10 ~ 40mm.Between liquid trap 3 and distributing pipe 4, be provided with a plurality of flat tubes 1, the width of flat tube 1 is 10 ~ 30mm, is highly 1 ~ 2mm, and being shaped as of the hole on flat tube 1 is square or circular.
As shown in Figure 3, be provided with fin 2 provided by the invention between adjacent flat tube 1, this fin 2 consists of the first fin 21 and second fin 22 two parts.The whole height of fin 2, than the high 0.1 ~ 0.5mm of distance between adjacent flat tube 1, has certain magnitude of interference, fin 2 can be plugged between adjacent flat tube 1.In addition, the mounting means of fin 2 between adjacent flat tube 1 can also be local spot welding etc.
The material of the first fin 21 and the second fin 22 is foam metal, and foam metal can be selected foam copper, foamed aluminium, foam iron and nickel foam etc.Foam metal is comprised of rigid backbone and interior bone hole, has excellent physical characteristic and good mechanical performance, and its proportion is little, be difficult for bending, specific area is large, heat exchange heat-sinking capability is high.In the present invention, the aperture of foam metal is preferably 0.05 ~ 4mm.Foam metal can supply circulation of air, and mobile air, by the through hole of foam metal fin, can produce complicated Three-dimensional Flow, has increased the heat exchange area of heat exchanger air side, can effectively improve the heat exchange property of heat exchanger.
As shown in Figure 4, the first fin 21 comprises two laminate structures that are parallel to each other, the thickness e=0.1 ~ 5mm of laminate structure.Between the first 21 two of fins laminate structure, be provided with that the second fin 22, the second fins 22 are uniformly distributed and interval arranges.The first fin 21 and the second fin 22 are integrated while making.
As shown in Figure 1, the shape of the second fin 21 is various, and specifically can select cross section is the tri-prismoid of isosceles triangle, as shown in Fig. 1 (a); Cross section is the tri-prismoid that class isosceles triangle and its waist are camber line, and its mean camber line can be concave arc line, and the two sides of tri-prismoid are cancave cambered surface, as shown in Fig. 1 (b); Also can be convex arc line, the two sides of tri-prismoid be convex globoidal, as shown in Fig. 1 (c).It is the four prisms cylinder of isosceles trapezoid that the second fin 21 can also be selected cross section, as shown in Figure 1 (d) shows; Cross section is the four prisms cylinder that class isosceles trapezoid and its waist are camber line, and its mean camber line can be concave arc line, and the two sides of four prisms cylinder are cancave cambered surface, as shown in Fig. 1 (e); Also can be convex arc line, the two sides of four prisms cylinder be convex globoidal, as shown in Fig. 1 (f).
In conjunction with shown in Fig. 4 to Fig. 8, when the shape of the second fin 22 is that cross section is while being the tri-prismoid of isosceles triangle or class isosceles triangle, in tri-prismoid, the summit of isosceles triangle or class isosceles triangle is all positioned at a side of the first fin 21, and base is all positioned at the opposite side of the first fin 21.Now the basic parameter of the second fin 22 is as follows: the height a=5 ~ 20mm of tri-prismoid; The base length of isosceles triangle or class isosceles triangle, i.e. tri-prismoid bottom width c=0.5 ~ 2mm in tri-prismoid; In tri-prismoid, the summit of isosceles triangle or class isosceles triangle is to the vertical range d=10 ~ 30mm on base, identical with the width of flat tube 1; Distance b=1 ~ the 2mm of adjacent the second fin 22, is as the criterion with the distance between isosceles triangle in tri-prismoid or class isosceles triangle line of symmetry.
In conjunction with shown in Fig. 9 to Figure 12, when the shape of the second fin 22 is that cross section is while being the four prisms cylinder of isosceles trapezoid or class isosceles trapezoid, in prism, the shorter base of isosceles trapezoid or class isosceles trapezoid is all positioned at a side of the first fin 21, and longer base is all positioned at the opposite side of the first fin 21.Now the basic parameter of the second fin 22 is as follows: the height of four prisms cylinder is 5 ~ 20mm; The longer base length of isosceles trapezoid or class isosceles trapezoid in four prisms cylinder, four prisms cylinder bottom width is 0.5 ~ 2mm; In four prisms cylinder, the vertical range on the Dao compare Chang base, shorter base of isosceles trapezoid or class isosceles trapezoid is 10 ~ 30mm, identical with the width of flat tube 1; The distance of adjacent the second fin 22 is 1 ~ 2mm, with the distance between the line of symmetry of isosceles trapezoid in four prisms cylinder or class isosceles trapezoid, is as the criterion.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, can also make the concrete conversion of a lot of forms, within these all belong to protection scope of the present invention.
Claims (9)
1. a foam metal fin, be arranged between the adjacent flat tube of micro-channel heat exchanger, it is characterized in that, the second fin that the first fin that this fin is made by foam metal and foam metal are made forms, described the first fin comprises two laminate structures that are parallel to each other, between two described laminate structures, be evenly equipped with spaced the second fin, described the second fin is selected from the tri-prismoid that cross section is isosceles triangle, cross section is the tri-prismoid that class isosceles triangle and its waist are camber line, cross section is the four prisms cylinder of isosceles trapezoid, cross section is wherein a kind of of class isosceles trapezoid and its waist four prisms cylinder that is camber line,
In the tri-prismoid of all described the second fins, the summit of isosceles triangle or class isosceles triangle is all between the side of two laminate structure the same faces of described the first fin, and base is all between the side of two laminate structure another sides of described the first fin; In four prisms cylinder, the shorter base of isosceles trapezoid or class isosceles trapezoid is all between the side of two laminate structure the same faces of described the first fin, and longer base is all between the side of two laminate structure another sides of described the first fin.
2. a kind of foam metal fin according to claim 1, is characterized in that, described foam metal is wherein a kind of of foam copper, foamed aluminium, foam iron or nickel foam.
3. a kind of foam metal fin according to claim 1, is characterized in that, the aperture of described foam metal is 0.05 ~ 4mm.
4. a kind of foam metal fin according to claim 1, is characterized in that, the laminate structure thickness of described the first fin is 0.1 ~ 5mm.
5. a kind of foam metal fin according to claim 1, is characterized in that, the tri-prismoid of described the second fin or the height of column of four prisms cylinder are 5 ~ 20mm.
6. a kind of foam metal fin according to claim 1, is characterized in that, in the tri-prismoid of described the second fin, the base length of isosceles triangle or class isosceles triangle is 0.5 ~ 2mm; In the four prisms cylinder of described the second fin, the longer base length of isosceles trapezoid or class isosceles trapezoid is 0.5 ~ 2mm.
7. a kind of foam metal fin according to claim 1, is characterized in that, in the tri-prismoid of described the second fin, the summit of isosceles triangle or class isosceles triangle is 10 ~ 30mm to the vertical range on base; In the four prisms cylinder of described the second fin, the vertical range on the Dao compare Chang base, shorter base of isosceles trapezoid or class isosceles trapezoid is 10 ~ 30mm.
8. a kind of foam metal fin according to claim 1, it is characterized in that, in the tri-prismoid of adjacent described the second fin, in isosceles triangle or class isosceles triangle, four prisms cylinder, the distance between the line of symmetry of isosceles trapezoid or class isosceles trapezoid is 1 ~ 2mm.
9. a micro-channel heat exchanger, comprises a plurality of flat tubes, it is characterized in that, is provided with foam metal fin as claimed in claim 1 between adjacent described flat tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210334055.7A CN102878850B (en) | 2012-09-11 | 2012-09-11 | Foam metal fins and porous flat tube micro-channel heat exchanger with foam metal fins |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210334055.7A CN102878850B (en) | 2012-09-11 | 2012-09-11 | Foam metal fins and porous flat tube micro-channel heat exchanger with foam metal fins |
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| CN102878850A CN102878850A (en) | 2013-01-16 |
| CN102878850B true CN102878850B (en) | 2014-04-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103743280A (en) * | 2014-01-21 | 2014-04-23 | 广东志高空调有限公司 | Foam metal fin with irregular disturbance holes for parallel flow heat exchanger |
| CN103968613A (en) * | 2014-05-27 | 2014-08-06 | 广东志高空调有限公司 | Micro-channel heat exchanger |
| CN104896968A (en) * | 2015-06-16 | 2015-09-09 | 中国石油大学(华东) | Metal foam finned tube heat exchanger |
| CN108317774A (en) * | 2018-01-31 | 2018-07-24 | 天津商业大学 | A kind of CO based on foam metal2Cooling evaporator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050039894A1 (en) * | 2003-08-01 | 2005-02-24 | Viktor Brost | Vehicle radiator |
| US9891008B2 (en) * | 2007-01-25 | 2018-02-13 | The University Of Tokyo | Heat exchanger |
| JP4930413B2 (en) * | 2008-02-29 | 2012-05-16 | 日本軽金属株式会社 | Heat exchanger |
| CN201387254Y (en) * | 2009-03-19 | 2010-01-20 | 美的集团有限公司 | All-aluminum micro-channel heat exchanger |
| CN202734639U (en) * | 2012-09-11 | 2013-02-13 | 天津大学 | Foamed metal fin and porous flat tube micro-channel heat exchanger provided with same |
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