阅读说明：本技术 一种翅片盘管换热器 (Finned coil heat exchanger ) 是由 威廉·杰拉尔德·林恩 于 2020-08-05 设计创作，主要内容包括：本发明涉及换热器技术领域,尤其涉及一种翅片盘管换热器,通过于换热器壳体内设置有翅片组,并于翅片组上分布有至少两排垂直贯穿该翅片组的换热管孔,且换热管孔于翅片组上交错排布,每个所述换热管孔中均设置有换热管,且该翅片组包括多个并列且间隔设置的波纹形翅片；该波纹形翅片上设置有多个多边形翼片,且多个多边形翼片均位于换热管的外侧周围,从而提升了换热效率,增加了传热系数,并在一定程度上提升了压降,且在相同压降情况下,传热系数比普通换热器高。(The invention relates to the technical field of heat exchangers, in particular to a fin coil heat exchanger, wherein a fin group is arranged in a heat exchanger shell, at least two rows of heat exchange tube holes vertically penetrating through the fin group are distributed on the fin group, the heat exchange tube holes are distributed on the fin group in a staggered manner, a heat exchange tube is arranged in each heat exchange tube hole, and the fin group comprises a plurality of parallel corrugated fins arranged at intervals; the corrugated fins are provided with a plurality of polygonal fins which are all positioned around the outer side of the heat exchange tube, so that the heat exchange efficiency is improved, the heat transfer coefficient is increased, the pressure drop is improved to a certain extent, and the heat transfer coefficient is higher than that of a common heat exchanger under the condition of the same pressure drop.)

1. A fin coil heat exchanger is characterized by comprising a heat exchanger shell;

the heat exchanger comprises a heat exchanger shell, and is characterized in that a fin group is arranged in the heat exchanger shell, at least two rows of heat exchange tube holes vertically penetrating through the fin group are distributed on the fin group, the heat exchange tube holes are arranged on the fin group in a staggered manner, a heat exchange tube is arranged in each heat exchange tube hole, and the fin group comprises a plurality of corrugated fins which are arranged in parallel at intervals;

the corrugated fins are provided with a plurality of polygonal fins which are all positioned around the outer side of the heat exchange tube.

2. The finned coil heat exchanger as claimed in claim 1, wherein the polygonal fins are located on the rear side of the heat exchange tube in the direction of the wind, and the starting points of the polygonal fins are each located at the intersection of the horizontal tangent and the vertical tangent to the outer circle of the cross-sectional circle of the heat exchange tube.

3. The finned coil heat exchanger of claim 1 wherein the heat exchange tube holes in the same row of the fin pack are in a sinusoidal arrangement.

4. The finned coil heat exchanger of claim 1, wherein the corrugated fins are sine wave corrugated fins.

5. The finned coil heat exchanger of claim 1 wherein the polygonal fins are triangular fins and the height of the triangular fins is 60% to 80% of the spacing between adjacent corrugated fins.

6. The finned coil heat exchanger of claim 1, wherein the polygonal fins are shark fin-shaped fins and the height of the shark fin-shaped fins is 70% to 90% of the spacing between adjacent corrugated fins.

7. The finned coil heat exchanger of claim 6, wherein said shark fin-shaped fins are formed by a method comprising:

step S1, providing a reference triangle, wherein the reference triangle is a right-angled triangle with a horizontal right-angled side and a vertical right-angled side;

step S2, drawing a first extension line horizontally in the direction far away from the hypotenuse of the reference triangle by taking the vertex of the vertical right-angle side as a starting point;

step S3, forming a first reference circle by taking a first radius as a radius, and enabling the vertex of the first reference circle to be positioned on the first extension line, wherein the first reference circle is intersected with the acute angle end of the horizontal right-angle side;

step S4, forming a second reference circle with a second radius as a radius, wherein the second radius is smaller than the first radius, and enabling the vertex of the second reference circle to intersect with the first extension line, and the second reference circle to intersect with the right-angle end of the horizontal right-angle side;

wherein, use the first reference circle in the summit of first reference circle with the camber line of the acute angle end of horizontal cathetus is the first side of shark fin-shaped fin, use the second reference circle in the summit of second reference circle with the camber line of horizontal cathetus is the second side of shark fin-shaped fin, use the straight line between the summit of vertical cathetus and the second reference circle is the top edge of shark fin-shaped fin, use horizontal cathetus is the base of shark fin-shaped fin.

8. The finned coil heat exchanger of claim 7, wherein said shark fin-shaped fins are formed by a method further comprising:

step S5, drawing a second extension line horizontally in a direction far away from the horizontal right-angle side by taking the acute angle end of the horizontal right-angle side as a starting point;

step S6, forming a third reference circle with a third radius as a radius, where a lowest point of the third reference circle is located on the second extension line, and the third reference circle borders the first side;

wherein a continuous line between a lowest point of the third reference circle and a vertex of the first reference circle is taken as a new first side edge of the shark fin-shaped fin.

9. The finned coil heat exchanger of claim 8, wherein the length of the first radius is 4-8 times the height of the vertical leg, the length of the second radius is 1-4 times the height of the vertical leg, and the length of the third radius is 2-4 times the height of the vertical leg.

10. The finned coil heat exchanger of claim 6, wherein the shark fin-shaped fins have an angle of attack of 20-35 °.

Technical Field

The invention relates to the technical field of air heat exchangers, in particular to a fin coil heat exchanger.

Background

At present, because fin coil heat exchanger need carry out the heat exchange through air and fin, can be because of passing through the heat exchange tube when the air passes through the fin clearance, can cause the heat exchange tube rear side to form the whirl air current because of the inside side extrusion of the air current in the outside when heat exchange tube both sides are through gathering, this whirl air current takes place and then can lead to both sides to stop in the pipeline rear by heat-conduction refrigerated air current in the heat exchanger, reduce coefficient of heat transfer, and then can lead to the whole heat exchange efficiency in the heat exchanger lower, this is that technical staff in the field does not want.

Disclosure of Invention

In view of the above existing problems, the present invention discloses a fin coil heat exchanger, which comprises a heat exchanger shell;

the heat exchanger comprises a heat exchanger shell, and is characterized in that a fin group is arranged in the heat exchanger shell, at least two rows of heat exchange tube holes vertically penetrating through the fin group are distributed on the fin group, the heat exchange tube holes are arranged on the fin group in a staggered manner, a heat exchange tube is arranged in each heat exchange tube hole, and the fin group comprises a plurality of corrugated fins which are arranged in parallel at intervals;

the corrugated fins are provided with a plurality of polygonal fins which are all positioned around the outer side of the heat exchange tube.

Preferably, the polygonal fin is located at the rear side of the heat exchange tube in the wind direction, and the starting point of the polygonal fin is located at the intersection point of the horizontal tangent and the vertical tangent of the excircle of the section ring of the heat exchange tube.

Preferably, the heat exchange tube holes in the same row on the fin group are arranged in a sine wave shape.

Preferably, the corrugated fins are sine wave corrugated fins.

Preferably, the polygonal fins are triangular fins, and the height of the triangular fins is 60% -80% of the distance between adjacent corrugated fins.

Preferably, the polygonal fins are shark fin-shaped fins, and the height of each shark fin-shaped fin is 70% -90% of the distance between adjacent corrugated fins.

Preferably, the shark fin shaped airfoil is constructed by a method comprising:

step S1, providing a reference triangle, wherein the reference triangle is a right-angled triangle with a horizontal right-angled side and a vertical right-angled side;

step S2, drawing a first extension line horizontally in the direction far away from the hypotenuse of the reference triangle by taking the vertex of the vertical right-angle side as a starting point;

step S3, forming a first reference circle by taking a first radius as a radius, and enabling the vertex of the first reference circle to be positioned on the first extension line, wherein the first reference circle is intersected with the acute angle end of the horizontal right-angle side;

step S4, forming a second reference circle with a second radius as a radius, wherein the second radius is smaller than the first radius, and enabling the vertex of the second reference circle to intersect with the first extension line, and the second reference circle to intersect with the right-angle end of the horizontal right-angle side;

wherein, use the first reference circle in the summit of first reference circle with the camber line of the acute angle end of horizontal cathetus is the first side of shark fin-shaped fin, use the second reference circle in the summit of second reference circle with the camber line of horizontal cathetus is the second side of shark fin-shaped fin, use the straight line between the summit of vertical cathetus and the second reference circle is the top edge of shark fin-shaped fin, use horizontal cathetus is the base of shark fin-shaped fin.

Preferably, the shark fin-shaped fin is formed by a method further comprising:

step S5, drawing a second extension line horizontally in a direction far away from the horizontal right-angle side by taking the acute angle end of the horizontal right-angle side as a starting point;

step S6, forming a third reference circle with a third radius as a radius, where a lowest point of the third reference circle is located on the second extension line, and the third reference circle borders the first side;

wherein a continuous line between a lowest point of the third reference circle and a vertex of the first reference circle is taken as a new first side edge of the shark fin-shaped fin.

Preferably, the length of the first radius is 4-8 times of the height of the vertical right-angle side, the length of the second radius is 1-4 times of the height of the vertical right-angle side, and the length of the third radius is 2-4 times of the height of the vertical right-angle side.

Preferably, the attack angle of the shark fin-shaped wing is 20-35 degrees.

The invention has the following advantages or beneficial effects:

the invention discloses a fin coil heat exchanger, wherein a fin group is arranged in a heat exchanger shell, at least two rows of heat exchange tube holes vertically penetrating the fin group are distributed on the fin group, the heat exchange tube holes are arranged on the fin group in a staggered manner, a heat exchange tube is arranged in each heat exchange tube hole, and the fin group comprises a plurality of parallel corrugated fins arranged at intervals; the corrugated fins are provided with a plurality of polygonal fins which are all positioned around the outer side of the heat exchange tube, so that the heat exchange efficiency is improved, the heat transfer coefficient is increased, the pressure drop is improved to a certain extent, and the heat transfer coefficient is higher than that of a common heat exchanger under the condition of the same pressure drop.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic structural diagram of a finned coil heat exchanger according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view at AA in an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the heat exchange tube and fins of FIG. 2;

FIG. 4 is a schematic view of a shark fin-shaped airfoil in accordance with an embodiment of the invention;

FIG. 5 is a schematic diagram of a reference triangle;

FIG. 6 is a schematic illustration of the formation of the shark fin-shaped airfoil of FIG. 4;

FIG. 7 is a schematic view of a shark fin-shaped airfoil in accordance with another embodiment of the invention;

FIG. 8 is a schematic illustration of the formation of the shark fin-shaped airfoil of FIG. 7.

Detailed Description

The invention discloses a fin coil heat exchanger, which is characterized in that a fin group is arranged in a shell of the heat exchanger, at least two rows of heat exchange tube holes which vertically penetrate through the fin group are distributed on the fin group, the heat exchange tube holes are arranged on the fin group in a staggered manner, a heat exchange tube is arranged in each heat exchange tube hole, and the fin group comprises a plurality of corrugated fins which are arranged in parallel at intervals; the corrugated fins are provided with a plurality of polygonal fins which are all positioned around the outer side of the heat exchange tube.

The present invention will be further described with reference to the following drawings and specific examples, but the present invention is not limited thereto.

As shown in fig. 1 to 8, the present embodiment discloses a fin coil heat exchanger, specifically, the fin coil heat exchanger includes a heat exchanger housing 1, and a first end plate 4 and a second end plate 5 disposed at two sides of the heat exchanger housing 1, in fig. 1 and 2, an air inlet of the heat exchanger is located at the bottom, an air outlet of the heat exchanger is located at the top, and an air direction moves upward from the bottom; the heat exchanger comprises a heat exchanger shell 1, wherein a fin group is arranged in the heat exchanger shell 1, at least two rows of heat exchange tube holes vertically penetrating through the fin group are distributed on the fin group, the heat exchange tube holes are arranged on the fin group in a staggered mode, a heat exchange tube 2 is arranged in each heat exchange tube hole, and the fin group comprises a plurality of corrugated fins 3 arranged in parallel from left to right (in other embodiments of the invention, the plurality of corrugated fins 3 in the fin group can also be arranged in parallel from top to bottom depending on whether the heat exchanger is transversely arranged or vertically arranged, in the embodiment, the heat exchanger is transversely arranged, the plurality of corrugated fins 3 in the fin group are arranged in parallel from left to right, and the distances between the adjacent corrugated fins 3 are equal); the corrugated fin 3 is provided with a plurality of polygonal fins 6, and the polygonal fins 6 are all positioned around the outer side of the heat exchange tube 2.

Specifically, this polygon fin 6 is located the rear side of the heat exchange tube 2 in the direction of the wind, this is in order logic with the air intake as the front side, the air outlet as the rear side, polygon fin 6 is located the rear side of heat exchange tube 2, and the starting point of polygon fin 6 all is located the horizontal tangent 71 and the intersection point of vertical tangent 72 of the section ring excircle of heat exchange tube 2 and the extension line that corresponds the pipeline central point in order to ensure the efficiency of defrosting, preferentially, the starting point of polygon fin 6 all is located the intersection point of horizontal tangent 71 and vertical tangent 72 of the section ring excircle of heat exchange tube 2, as the structure shown in fig. 3. The attack angle β of the polygonal wing 6 is an included angle between the polygonal wing 6 and the vertical tangent 72. β should be between 20 ° and 60 °, preferably 20 ° to 35 °; in fig. 3 β is 30 °.

In a preferred embodiment of the present invention, as shown in fig. 2, the heat exchange tube holes in the same row of the fin group are arranged in a sine wave, so that the heat exchange tubes 2 arranged therein are arranged in a sine wave in the same row, and in this arrangement, the distance between the tube and all the adjacent two tubes is the same, and the tube is in an equilateral triangle shape. The heat exchange tubes in the same row are arranged in a sine wave shape. The sine wave coil arrangement has higher heat exchange efficiency and heat transfer coefficient than the common staggered arrangement, and the staggered arrangement has higher heat exchange efficiency and heat transfer coefficient than the straight arrangement; wherein the cross-wires 31 between the heat exchange tubes are the spacing required to produce the desired fin slices.

In a preferred embodiment of the present invention, as shown in fig. 1, the corrugated fin 3 is a sine corrugated fin, that is, the corrugated fin is in a sine wave shape, the sine corrugated fin is similar to a sine wave in shape, and the heat exchange efficiency and the heat transfer coefficient of the sine corrugated fin are higher than those of a flat fin. In addition, the sine corrugated fin has less convoluted (retained) airflow behind the corrugation than the corrugated fin, so that the heat exchange efficiency and the heat transfer coefficient of the sine corrugated fin are higher than those of the corrugated fin.

In the invention, the circular coil pipe is used as the heat exchange pipe 2 for conveying the liquid working fluid in the heat exchanger, the polygonal fins are generated around the heat exchange pipe 2 as vortex generators by a numerical control die when the corrugated fins are punched, specifically, the polygonal fins 6 can be triangular fins, trapezoidal fins, semi-elliptical fins, rectangular fins or shark fin-shaped fins, and the like, the height of the polygonal fins 6 is 60-100% of the distance between the adjacent corrugated fins, wherein the height of the triangular fins is preferably 60-80%, and the height is favorable for production. The height of the triangular fin is preferably 60-80% of the distance between the adjacent corrugated fins 3; the corrugated fins 3 have a thickness of 0.18mm to 0.5mm and the polygonal fins 6 are generally perpendicular to the fins but may form other angles with the fins.

The above polygonal fin 6 is preferably a shark fin-shaped fin, and the height of the shark fin-shaped fin is preferably 70% to 90% of the distance between adjacent corrugated fins 3, which is specifically described by taking the shark fin-shaped fin as an example.

In a preferred embodiment of the present invention, as shown in FIGS. 4-6, a method of forming a conventional shark fin-shaped airfoil formed by two reference circles includes:

step S1, a reference triangle is provided, the reference triangle is a right triangle having a horizontal cathetus and a vertical cathetus.

And step S2, drawing a first extension line horizontally in the direction far away from the hypotenuse of the reference triangle by taking the vertex of the vertical cathetus as a starting point.

Step S3, a first reference circle C1 is formed with V (first radius) as a radius such that the vertex of the first reference circle C1 is located on the first extension line and the first reference circle C1 intersects the acute end of the horizontal leg.

Step S4, a second reference circle C2 is formed with U (second radius) as a radius, the vertex of the second reference circle C2 with the second radius U smaller than the first radius V intersects the first extension line, and the second reference circle C2 intersects the right-angled end of the horizontal cathetus.

Wherein, an arc line of the first reference circle C1 between the vertex of the first reference circle C1 and the acute angle end of the horizontal cathetus is taken as a first side edge of the shark fin-shaped fin, an arc line of the second reference circle C2 between the vertex of the second reference circle C2 and the right angle end of the horizontal cathetus is taken as a second side edge of the shark fin-shaped fin, a straight line between the vertical cathetus and the vertex of the second reference circle C2 is taken as a top edge, and the horizontal cathetus is taken as the bottom edge of the shark fin-shaped fin; the shark fin-shaped airfoil formed by the two reference circles may be used as a base airfoil; in an embodiment of the present invention, the arc generated by the second reference circle C2 may be replaced by a straight line. Because the shark fin-shaped fins have a larger surface area than the triangular fins, the resulting air resistance and pressure drop will be greater than for the triangular fins. Because the vortex is easier to form in fluid mechanics, the heat exchange efficiency and the heat transfer coefficient of the heat exchanger are higher than those of the triangular fin; the sharp corner at the upper part of the rear side of the shark fin-shaped fin can be changed into a fillet so as to reduce the production difficulty, the operation can not be realized on the triangular fin, and the fillet has weak effect on vortex generation.

Specifically, the length of the radius (V) of the first reference circle C1 is 2 to 8 times of the height of the vertical square edge (i.e. the height of the shark fin-shaped fin), and preferably, the length of the radius (V) of the first reference circle C1 is 4 to 8 times of the height of the vertical square edge; the length of the radius (U) of the second reference circle C2 is 1-6 times of the height of the vertical right-angle side, and preferably, the length of the radius (U) of the second reference circle C2 is 1-4 times of the height of the vertical right-angle side;

in another preferred embodiment of the present invention, as shown in fig. 7 and 8, the shark fin-shaped fin may also be deformed by three reference circles, which are performed based on the above steps S1 to S4, and specifically, the method for forming the deformed shark fin-shaped fin further includes, based on the above steps S1 to S4:

step S5, drawing a second extension line horizontally in a direction far away from the horizontal right-angle side by taking the acute angle end of the horizontal right-angle side as a starting point;

step S6, forming a third reference circle C3 with W (the third radius) as the radius, the lowest point of the third reference circle C3 being located on the second extension line, and the third reference circle C3 being bordered by the first side;

wherein, a continuous line between the lowest point of the third reference circle C3 and the top point of the first reference circle C1 is taken as a new first side edge of the shark fin-shaped fin.

Specifically, the length of the radius (W) of the third reference circle C3 is 1 to 4 times the height of the vertical square, and preferably, the length of the radius of the third reference circle C3 is 2 to 4 times the height of the vertical square.

In a preferred embodiment of the invention, the ratio of the length of the side of the shark fin to the corrugated fin 3 to the fin height is 1:1 to 8:1, preferably 2:1 for a triangular fin. For a quadrilateral tab, the ratio is preferably 5: 1. For a shark fin shape, the ratio is preferably 2: 1.

Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described herein in detail. Such variations do not affect the essence of the present invention and are not described herein.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.